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Consistently use "superuser" instead of "super user"
[pgsql.git] / src / pl / plperl / plperl.c
blob6299adf71ad8eeef777bf52d4d7689c51d7737a2
1 /**********************************************************************
2 * plperl.c - perl as a procedural language for PostgreSQL
3 *
4 * src/pl/plperl/plperl.c
5 *
6 **********************************************************************/
7
8 #include "postgres.h"
9
10 /* system stuff */
11 #include <ctype.h>
12 #include <fcntl.h>
13 #include <limits.h>
14 #include <unistd.h>
15
16 /* postgreSQL stuff */
17 #include "access/htup_details.h"
18 #include "access/xact.h"
19 #include "catalog/pg_language.h"
20 #include "catalog/pg_proc.h"
21 #include "catalog/pg_type.h"
22 #include "commands/event_trigger.h"
23 #include "commands/trigger.h"
24 #include "executor/spi.h"
25 #include "funcapi.h"
26 #include "mb/pg_wchar.h"
27 #include "miscadmin.h"
28 #include "nodes/makefuncs.h"
29 #include "parser/parse_type.h"
30 #include "storage/ipc.h"
31 #include "tcop/tcopprot.h"
32 #include "utils/builtins.h"
33 #include "utils/fmgroids.h"
34 #include "utils/guc.h"
35 #include "utils/hsearch.h"
36 #include "utils/lsyscache.h"
37 #include "utils/memutils.h"
38 #include "utils/rel.h"
39 #include "utils/syscache.h"
40 #include "utils/typcache.h"
41
42 /* define our text domain for translations */
43 #undef TEXTDOMAIN
44 #define TEXTDOMAIN PG_TEXTDOMAIN("plperl")
45
46 /* perl stuff */
47 /* string literal macros defining chunks of perl code */
48 #include "perlchunks.h"
49 #include "plperl.h"
50 #include "plperl_helpers.h"
51 /* defines PLPERL_SET_OPMASK */
52 #include "plperl_opmask.h"
53
54 EXTERN_C void boot_DynaLoader(pTHX_ CV *cv);
55 EXTERN_C void boot_PostgreSQL__InServer__Util(pTHX_ CV *cv);
56 EXTERN_C void boot_PostgreSQL__InServer__SPI(pTHX_ CV *cv);
57
58 PG_MODULE_MAGIC;
59
60 /**********************************************************************
61 * Information associated with a Perl interpreter. We have one interpreter
62 * that is used for all plperlu (untrusted) functions. For plperl (trusted)
63 * functions, there is a separate interpreter for each effective SQL userid.
64 * (This is needed to ensure that an unprivileged user can't inject Perl code
65 * that'll be executed with the privileges of some other SQL user.)
66 *
67 * The plperl_interp_desc structs are kept in a Postgres hash table indexed
68 * by userid OID, with OID 0 used for the single untrusted interpreter.
69 * Once created, an interpreter is kept for the life of the process.
70 *
71 * We start out by creating a "held" interpreter, which we initialize
72 * only as far as we can do without deciding if it will be trusted or
73 * untrusted. Later, when we first need to run a plperl or plperlu
74 * function, we complete the initialization appropriately and move the
75 * PerlInterpreter pointer into the plperl_interp_hash hashtable. If after
76 * that we need more interpreters, we create them as needed if we can, or
77 * fail if the Perl build doesn't support multiple interpreters.
78 *
79 * The reason for all the dancing about with a held interpreter is to make
80 * it possible for people to preload a lot of Perl code at postmaster startup
81 * (using plperl.on_init) and then use that code in backends. Of course this
82 * will only work for the first interpreter created in any backend, but it's
83 * still useful with that restriction.
84 **********************************************************************/
85 typedef struct plperl_interp_desc
86 {
87 Oid user_id; /* Hash key (must be first!) */
88 PerlInterpreter *interp; /* The interpreter */
89 HTAB *query_hash; /* plperl_query_entry structs */
90 } plperl_interp_desc;
91
92
93 /**********************************************************************
94 * The information we cache about loaded procedures
95 *
96 * The fn_refcount field counts the struct's reference from the hash table
97 * shown below, plus one reference for each function call level that is using
98 * the struct. We can release the struct, and the associated Perl sub, when
99 * the fn_refcount goes to zero. Releasing the struct itself is done by
100 * deleting the fn_cxt, which also gets rid of all subsidiary data.
101 **********************************************************************/
102 typedef struct plperl_proc_desc
103 {
104 char *proname; /* user name of procedure */
105 MemoryContext fn_cxt; /* memory context for this procedure */
106 unsigned long fn_refcount; /* number of active references */
107 TransactionId fn_xmin; /* xmin/TID of procedure's pg_proc tuple */
108 ItemPointerData fn_tid;
109 SV *reference; /* CODE reference for Perl sub */
110 plperl_interp_desc *interp; /* interpreter it's created in */
111 bool fn_readonly; /* is function readonly (not volatile)? */
112 Oid lang_oid;
113 List *trftypes;
114 bool lanpltrusted; /* is it plperl, rather than plperlu? */
115 bool fn_retistuple; /* true, if function returns tuple */
116 bool fn_retisset; /* true, if function returns set */
117 bool fn_retisarray; /* true if function returns array */
118 /* Conversion info for function's result type: */
119 Oid result_oid; /* Oid of result type */
120 FmgrInfo result_in_func; /* I/O function and arg for result type */
121 Oid result_typioparam;
122 /* Per-argument info for function's argument types: */
123 int nargs;
124 FmgrInfo *arg_out_func; /* output fns for arg types */
125 bool *arg_is_rowtype; /* is each arg composite? */
126 Oid *arg_arraytype; /* InvalidOid if not an array */
127 } plperl_proc_desc;
128
129 #define increment_prodesc_refcount(prodesc) \
130 ((prodesc)->fn_refcount++)
131 #define decrement_prodesc_refcount(prodesc) \
132 do { \
133 Assert((prodesc)->fn_refcount > 0); \
134 if (--((prodesc)->fn_refcount) == 0) \
135 free_plperl_function(prodesc); \
136 } while(0)
137
138 /**********************************************************************
139 * For speedy lookup, we maintain a hash table mapping from
140 * function OID + trigger flag + user OID to plperl_proc_desc pointers.
141 * The reason the plperl_proc_desc struct isn't directly part of the hash
142 * entry is to simplify recovery from errors during compile_plperl_function.
143 *
144 * Note: if the same function is called by multiple userIDs within a session,
145 * there will be a separate plperl_proc_desc entry for each userID in the case
146 * of plperl functions, but only one entry for plperlu functions, because we
147 * set user_id = 0 for that case. If the user redeclares the same function
148 * from plperl to plperlu or vice versa, there might be multiple
149 * plperl_proc_ptr entries in the hashtable, but only one is valid.
150 **********************************************************************/
151 typedef struct plperl_proc_key
152 {
153 Oid proc_id; /* Function OID */
154
155 /*
156 * is_trigger is really a bool, but declare as Oid to ensure this struct
157 * contains no padding
158 */
159 Oid is_trigger; /* is it a trigger function? */
160 Oid user_id; /* User calling the function, or 0 */
161 } plperl_proc_key;
162
163 typedef struct plperl_proc_ptr
164 {
165 plperl_proc_key proc_key; /* Hash key (must be first!) */
166 plperl_proc_desc *proc_ptr;
167 } plperl_proc_ptr;
168
169 /*
170 * The information we cache for the duration of a single call to a
171 * function.
172 */
173 typedef struct plperl_call_data
174 {
175 plperl_proc_desc *prodesc;
176 FunctionCallInfo fcinfo;
177 /* remaining fields are used only in a function returning set: */
178 Tuplestorestate *tuple_store;
179 TupleDesc ret_tdesc;
180 Oid cdomain_oid; /* 0 unless returning domain-over-composite */
181 void *cdomain_info;
182 MemoryContext tmp_cxt;
183 } plperl_call_data;
184
185 /**********************************************************************
186 * The information we cache about prepared and saved plans
187 **********************************************************************/
188 typedef struct plperl_query_desc
189 {
190 char qname[24];
191 MemoryContext plan_cxt; /* context holding this struct */
192 SPIPlanPtr plan;
193 int nargs;
194 Oid *argtypes;
195 FmgrInfo *arginfuncs;
196 Oid *argtypioparams;
197 } plperl_query_desc;
198
199 /* hash table entry for query desc */
200
201 typedef struct plperl_query_entry
202 {
203 char query_name[NAMEDATALEN];
204 plperl_query_desc *query_data;
205 } plperl_query_entry;
206
207 /**********************************************************************
208 * Information for PostgreSQL - Perl array conversion.
209 **********************************************************************/
210 typedef struct plperl_array_info
211 {
212 int ndims;
213 bool elem_is_rowtype; /* 't' if element type is a rowtype */
214 Datum *elements;
215 bool *nulls;
216 int *nelems;
217 FmgrInfo proc;
218 FmgrInfo transform_proc;
219 } plperl_array_info;
220
221 /**********************************************************************
222 * Global data
223 **********************************************************************/
224
225 static HTAB *plperl_interp_hash = NULL;
226 static HTAB *plperl_proc_hash = NULL;
227 static plperl_interp_desc *plperl_active_interp = NULL;
228
229 /* If we have an unassigned "held" interpreter, it's stored here */
230 static PerlInterpreter *plperl_held_interp = NULL;
231
232 /* GUC variables */
233 static bool plperl_use_strict = false;
234 static char *plperl_on_init = NULL;
235 static char *plperl_on_plperl_init = NULL;
236 static char *plperl_on_plperlu_init = NULL;
237
238 static bool plperl_ending = false;
239 static OP *(*pp_require_orig) (pTHX) = NULL;
240 static char plperl_opmask[MAXO];
241
242 /* this is saved and restored by plperl_call_handler */
243 static plperl_call_data *current_call_data = NULL;
244
245 /**********************************************************************
246 * Forward declarations
247 **********************************************************************/
248 void _PG_init(void);
249
250 static PerlInterpreter *plperl_init_interp(void);
251 static void plperl_destroy_interp(PerlInterpreter **);
252 static void plperl_fini(int code, Datum arg);
253 static void set_interp_require(bool trusted);
254
255 static Datum plperl_func_handler(PG_FUNCTION_ARGS);
256 static Datum plperl_trigger_handler(PG_FUNCTION_ARGS);
257 static void plperl_event_trigger_handler(PG_FUNCTION_ARGS);
258
259 static void free_plperl_function(plperl_proc_desc *prodesc);
260
261 static plperl_proc_desc *compile_plperl_function(Oid fn_oid,
262 bool is_trigger,
263 bool is_event_trigger);
264
265 static SV *plperl_hash_from_tuple(HeapTuple tuple, TupleDesc tupdesc, bool include_generated);
266 static SV *plperl_hash_from_datum(Datum attr);
267 static SV *plperl_ref_from_pg_array(Datum arg, Oid typid);
268 static SV *split_array(plperl_array_info *info, int first, int last, int nest);
269 static SV *make_array_ref(plperl_array_info *info, int first, int last);
270 static SV *get_perl_array_ref(SV *sv);
271 static Datum plperl_sv_to_datum(SV *sv, Oid typid, int32 typmod,
272 FunctionCallInfo fcinfo,
273 FmgrInfo *finfo, Oid typioparam,
274 bool *isnull);
275 static void _sv_to_datum_finfo(Oid typid, FmgrInfo *finfo, Oid *typioparam);
276 static Datum plperl_array_to_datum(SV *src, Oid typid, int32 typmod);
277 static void array_to_datum_internal(AV *av, ArrayBuildState *astate,
278 int *ndims, int *dims, int cur_depth,
279 Oid arraytypid, Oid elemtypid, int32 typmod,
280 FmgrInfo *finfo, Oid typioparam);
281 static Datum plperl_hash_to_datum(SV *src, TupleDesc td);
282
283 static void plperl_init_shared_libs(pTHX);
284 static void plperl_trusted_init(void);
285 static void plperl_untrusted_init(void);
286 static HV *plperl_spi_execute_fetch_result(SPITupleTable *, uint64, int);
287 static void plperl_return_next_internal(SV *sv);
288 static char *hek2cstr(HE *he);
289 static SV **hv_store_string(HV *hv, const char *key, SV *val);
290 static SV **hv_fetch_string(HV *hv, const char *key);
291 static void plperl_create_sub(plperl_proc_desc *desc, const char *s, Oid fn_oid);
292 static SV *plperl_call_perl_func(plperl_proc_desc *desc,
293 FunctionCallInfo fcinfo);
294 static void plperl_compile_callback(void *arg);
295 static void plperl_exec_callback(void *arg);
296 static void plperl_inline_callback(void *arg);
297 static char *strip_trailing_ws(const char *msg);
298 static OP *pp_require_safe(pTHX);
299 static void activate_interpreter(plperl_interp_desc *interp_desc);
300
301 #ifdef WIN32
302 static char *setlocale_perl(int category, char *locale);
303 #endif
304
305 /*
306 * Decrement the refcount of the given SV within the active Perl interpreter
307 *
308 * This is handy because it reloads the active-interpreter pointer, saving
309 * some notation in callers that switch the active interpreter.
310 */
311 static inline void
312 SvREFCNT_dec_current(SV *sv)
313 {
314 dTHX;
315
316 SvREFCNT_dec(sv);
317 }
318
319 /*
320 * convert a HE (hash entry) key to a cstr in the current database encoding
321 */
322 static char *
323 hek2cstr(HE *he)
324 {
325 dTHX;
326 char *ret;
327 SV *sv;
328
329 /*
330 * HeSVKEY_force will return a temporary mortal SV*, so we need to make
331 * sure to free it with ENTER/SAVE/FREE/LEAVE
332 */
333 ENTER;
334 SAVETMPS;
335
336 /*-------------------------
337 * Unfortunately, while HeUTF8 is true for most things > 256, for values
338 * 128..255 it's not, but perl will treat them as unicode code points if
339 * the utf8 flag is not set ( see The "Unicode Bug" in perldoc perlunicode
340 * for more)
341 *
342 * So if we did the expected:
343 * if (HeUTF8(he))
344 * utf_u2e(key...);
345 * else // must be ascii
346 * return HePV(he);
347 * we won't match columns with codepoints from 128..255
348 *
349 * For a more concrete example given a column with the name of the unicode
350 * codepoint U+00ae (registered sign) and a UTF8 database and the perl
351 * return_next { "\N{U+00ae}=>'text } would always fail as heUTF8 returns
352 * 0 and HePV() would give us a char * with 1 byte contains the decimal
353 * value 174
354 *
355 * Perl has the brains to know when it should utf8 encode 174 properly, so
356 * here we force it into an SV so that perl will figure it out and do the
357 * right thing
358 *-------------------------
359 */
360
361 sv = HeSVKEY_force(he);
362 if (HeUTF8(he))
363 SvUTF8_on(sv);
364 ret = sv2cstr(sv);
365
366 /* free sv */
367 FREETMPS;
368 LEAVE;
369
370 return ret;
371 }
372
373
374 /*
375 * _PG_init() - library load-time initialization
376 *
377 * DO NOT make this static nor change its name!
378 */
379 void
380 _PG_init(void)
381 {
382 /*
383 * Be sure we do initialization only once.
384 *
385 * If initialization fails due to, e.g., plperl_init_interp() throwing an
386 * exception, then we'll return here on the next usage and the user will
387 * get a rather cryptic: ERROR: attempt to redefine parameter
388 * "plperl.use_strict"
389 */
390 static bool inited = false;
391 HASHCTL hash_ctl;
392
393 if (inited)
394 return;
395
396 /*
397 * Support localized messages.
398 */
399 pg_bindtextdomain(TEXTDOMAIN);
400
401 /*
402 * Initialize plperl's GUCs.
403 */
404 DefineCustomBoolVariable("plperl.use_strict",
405 gettext_noop("If true, trusted and untrusted Perl code will be compiled in strict mode."),
406 NULL,
407 &plperl_use_strict,
408 false,
409 PGC_USERSET, 0,
410 NULL, NULL, NULL);
411
412 /*
413 * plperl.on_init is marked PGC_SIGHUP to support the idea that it might
414 * be executed in the postmaster (if plperl is loaded into the postmaster
415 * via shared_preload_libraries). This isn't really right either way,
416 * though.
417 */
418 DefineCustomStringVariable("plperl.on_init",
419 gettext_noop("Perl initialization code to execute when a Perl interpreter is initialized."),
420 NULL,
421 &plperl_on_init,
422 NULL,
423 PGC_SIGHUP, 0,
424 NULL, NULL, NULL);
425
426 /*
427 * plperl.on_plperl_init is marked PGC_SUSET to avoid issues whereby a
428 * user who might not even have USAGE privilege on the plperl language
429 * could nonetheless use SET plperl.on_plperl_init='...' to influence the
430 * behaviour of any existing plperl function that they can execute (which
431 * might be SECURITY DEFINER, leading to a privilege escalation). See
432 * http://archives.postgresql.org/pgsql-hackers/2010-02/msg00281.php and
433 * the overall thread.
434 *
435 * Note that because plperl.use_strict is USERSET, a nefarious user could
436 * set it to be applied against other people's functions. This is judged
437 * OK since the worst result would be an error. Your code oughta pass
438 * use_strict anyway ;-)
439 */
440 DefineCustomStringVariable("plperl.on_plperl_init",
441 gettext_noop("Perl initialization code to execute once when plperl is first used."),
442 NULL,
443 &plperl_on_plperl_init,
444 NULL,
445 PGC_SUSET, 0,
446 NULL, NULL, NULL);
447
448 DefineCustomStringVariable("plperl.on_plperlu_init",
449 gettext_noop("Perl initialization code to execute once when plperlu is first used."),
450 NULL,
451 &plperl_on_plperlu_init,
452 NULL,
453 PGC_SUSET, 0,
454 NULL, NULL, NULL);
455
456 EmitWarningsOnPlaceholders("plperl");
457
458 /*
459 * Create hash tables.
460 */
461 hash_ctl.keysize = sizeof(Oid);
462 hash_ctl.entrysize = sizeof(plperl_interp_desc);
463 plperl_interp_hash = hash_create("PL/Perl interpreters",
464 8,
465 &hash_ctl,
466 HASH_ELEM | HASH_BLOBS);
467
468 hash_ctl.keysize = sizeof(plperl_proc_key);
469 hash_ctl.entrysize = sizeof(plperl_proc_ptr);
470 plperl_proc_hash = hash_create("PL/Perl procedures",
471 32,
472 &hash_ctl,
473 HASH_ELEM | HASH_BLOBS);
474
475 /*
476 * Save the default opmask.
477 */
478 PLPERL_SET_OPMASK(plperl_opmask);
479
480 /*
481 * Create the first Perl interpreter, but only partially initialize it.
482 */
483 plperl_held_interp = plperl_init_interp();
484
485 inited = true;
486 }
487
488
489 static void
490 set_interp_require(bool trusted)
491 {
492 if (trusted)
493 {
494 PL_ppaddr[OP_REQUIRE] = pp_require_safe;
495 PL_ppaddr[OP_DOFILE] = pp_require_safe;
496 }
497 else
498 {
499 PL_ppaddr[OP_REQUIRE] = pp_require_orig;
500 PL_ppaddr[OP_DOFILE] = pp_require_orig;
501 }
502 }
503
504 /*
505 * Cleanup perl interpreters, including running END blocks.
506 * Does not fully undo the actions of _PG_init() nor make it callable again.
507 */
508 static void
509 plperl_fini(int code, Datum arg)
510 {
511 HASH_SEQ_STATUS hash_seq;
512 plperl_interp_desc *interp_desc;
513
514 elog(DEBUG3, "plperl_fini");
515
516 /*
517 * Indicate that perl is terminating. Disables use of spi_* functions when
518 * running END/DESTROY code. See check_spi_usage_allowed(). Could be
519 * enabled in future, with care, using a transaction
520 * http://archives.postgresql.org/pgsql-hackers/2010-01/msg02743.php
521 */
522 plperl_ending = true;
523
524 /* Only perform perl cleanup if we're exiting cleanly */
525 if (code)
526 {
527 elog(DEBUG3, "plperl_fini: skipped");
528 return;
529 }
530
531 /* Zap the "held" interpreter, if we still have it */
532 plperl_destroy_interp(&plperl_held_interp);
533
534 /* Zap any fully-initialized interpreters */
535 hash_seq_init(&hash_seq, plperl_interp_hash);
536 while ((interp_desc = hash_seq_search(&hash_seq)) != NULL)
537 {
538 if (interp_desc->interp)
539 {
540 activate_interpreter(interp_desc);
541 plperl_destroy_interp(&interp_desc->interp);
542 }
543 }
544
545 elog(DEBUG3, "plperl_fini: done");
546 }
547
548
549 /*
550 * Select and activate an appropriate Perl interpreter.
551 */
552 static void
553 select_perl_context(bool trusted)
554 {
555 Oid user_id;
556 plperl_interp_desc *interp_desc;
557 bool found;
558 PerlInterpreter *interp = NULL;
559
560 /* Find or create the interpreter hashtable entry for this userid */
561 if (trusted)
562 user_id = GetUserId();
563 else
564 user_id = InvalidOid;
565
566 interp_desc = hash_search(plperl_interp_hash, &user_id,
567 HASH_ENTER,
568 &found);
569 if (!found)
570 {
571 /* Initialize newly-created hashtable entry */
572 interp_desc->interp = NULL;
573 interp_desc->query_hash = NULL;
574 }
575
576 /* Make sure we have a query_hash for this interpreter */
577 if (interp_desc->query_hash == NULL)
578 {
579 HASHCTL hash_ctl;
580
581 hash_ctl.keysize = NAMEDATALEN;
582 hash_ctl.entrysize = sizeof(plperl_query_entry);
583 interp_desc->query_hash = hash_create("PL/Perl queries",
584 32,
585 &hash_ctl,
586 HASH_ELEM | HASH_STRINGS);
587 }
588
589 /*
590 * Quick exit if already have an interpreter
591 */
592 if (interp_desc->interp)
593 {
594 activate_interpreter(interp_desc);
595 return;
596 }
597
598 /*
599 * adopt held interp if free, else create new one if possible
600 */
601 if (plperl_held_interp != NULL)
602 {
603 /* first actual use of a perl interpreter */
604 interp = plperl_held_interp;
605
606 /*
607 * Reset the plperl_held_interp pointer first; if we fail during init
608 * we don't want to try again with the partially-initialized interp.
609 */
610 plperl_held_interp = NULL;
611
612 if (trusted)
613 plperl_trusted_init();
614 else
615 plperl_untrusted_init();
616
617 /* successfully initialized, so arrange for cleanup */
618 on_proc_exit(plperl_fini, 0);
619 }
620 else
621 {
622 #ifdef MULTIPLICITY
623
624 /*
625 * plperl_init_interp will change Perl's idea of the active
626 * interpreter. Reset plperl_active_interp temporarily, so that if we
627 * hit an error partway through here, we'll make sure to switch back
628 * to a non-broken interpreter before running any other Perl
629 * functions.
630 */
631 plperl_active_interp = NULL;
632
633 /* Now build the new interpreter */
634 interp = plperl_init_interp();
635
636 if (trusted)
637 plperl_trusted_init();
638 else
639 plperl_untrusted_init();
640 #else
641 ereport(ERROR,
642 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
643 errmsg("cannot allocate multiple Perl interpreters on this platform")));
644 #endif
645 }
646
647 set_interp_require(trusted);
648
649 /*
650 * Since the timing of first use of PL/Perl can't be predicted, any
651 * database interaction during initialization is problematic. Including,
652 * but not limited to, security definer issues. So we only enable access
653 * to the database AFTER on_*_init code has run. See
654 * http://archives.postgresql.org/pgsql-hackers/2010-01/msg02669.php
655 */
656 {
657 dTHX;
658
659 newXS("PostgreSQL::InServer::SPI::bootstrap",
660 boot_PostgreSQL__InServer__SPI, __FILE__);
661
662 eval_pv("PostgreSQL::InServer::SPI::bootstrap()", FALSE);
663 if (SvTRUE(ERRSV))
664 ereport(ERROR,
665 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
666 errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV))),
667 errcontext("while executing PostgreSQL::InServer::SPI::bootstrap")));
668 }
669
670 /* Fully initialized, so mark the hashtable entry valid */
671 interp_desc->interp = interp;
672
673 /* And mark this as the active interpreter */
674 plperl_active_interp = interp_desc;
675 }
676
677 /*
678 * Make the specified interpreter the active one
679 *
680 * A call with NULL does nothing. This is so that "restoring" to a previously
681 * null state of plperl_active_interp doesn't result in useless thrashing.
682 */
683 static void
684 activate_interpreter(plperl_interp_desc *interp_desc)
685 {
686 if (interp_desc && plperl_active_interp != interp_desc)
687 {
688 Assert(interp_desc->interp);
689 PERL_SET_CONTEXT(interp_desc->interp);
690 /* trusted iff user_id isn't InvalidOid */
691 set_interp_require(OidIsValid(interp_desc->user_id));
692 plperl_active_interp = interp_desc;
693 }
694 }
695
696 /*
697 * Create a new Perl interpreter.
698 *
699 * We initialize the interpreter as far as we can without knowing whether
700 * it will become a trusted or untrusted interpreter; in particular, the
701 * plperl.on_init code will get executed. Later, either plperl_trusted_init
702 * or plperl_untrusted_init must be called to complete the initialization.
703 */
704 static PerlInterpreter *
705 plperl_init_interp(void)
706 {
707 PerlInterpreter *plperl;
708
709 static char *embedding[3 + 2] = {
710 "", "-e", PLC_PERLBOOT
711 };
712 int nargs = 3;
713
714 #ifdef WIN32
715
716 /*
717 * The perl library on startup does horrible things like call
718 * setlocale(LC_ALL,""). We have protected against that on most platforms
719 * by setting the environment appropriately. However, on Windows,
720 * setlocale() does not consult the environment, so we need to save the
721 * existing locale settings before perl has a chance to mangle them and
722 * restore them after its dirty deeds are done.
723 *
724 * MSDN ref:
725 * http://msdn.microsoft.com/library/en-us/vclib/html/_crt_locale.asp
726 *
727 * It appears that we only need to do this on interpreter startup, and
728 * subsequent calls to the interpreter don't mess with the locale
729 * settings.
730 *
731 * We restore them using setlocale_perl(), defined below, so that Perl
732 * doesn't have a different idea of the locale from Postgres.
733 *
734 */
735
736 char *loc;
737 char *save_collate,
738 *save_ctype,
739 *save_monetary,
740 *save_numeric,
741 *save_time;
742
743 loc = setlocale(LC_COLLATE, NULL);
744 save_collate = loc ? pstrdup(loc) : NULL;
745 loc = setlocale(LC_CTYPE, NULL);
746 save_ctype = loc ? pstrdup(loc) : NULL;
747 loc = setlocale(LC_MONETARY, NULL);
748 save_monetary = loc ? pstrdup(loc) : NULL;
749 loc = setlocale(LC_NUMERIC, NULL);
750 save_numeric = loc ? pstrdup(loc) : NULL;
751 loc = setlocale(LC_TIME, NULL);
752 save_time = loc ? pstrdup(loc) : NULL;
753
754 #define PLPERL_RESTORE_LOCALE(name, saved) \
755 STMT_START { \
756 if (saved != NULL) { setlocale_perl(name, saved); pfree(saved); } \
757 } STMT_END
758 #endif /* WIN32 */
759
760 if (plperl_on_init && *plperl_on_init)
761 {
762 embedding[nargs++] = "-e";
763 embedding[nargs++] = plperl_on_init;
764 }
765
766 /*
767 * The perl API docs state that PERL_SYS_INIT3 should be called before
768 * allocating interpreters. Unfortunately, on some platforms this fails in
769 * the Perl_do_taint() routine, which is called when the platform is using
770 * the system's malloc() instead of perl's own. Other platforms, notably
771 * Windows, fail if PERL_SYS_INIT3 is not called. So we call it if it's
772 * available, unless perl is using the system malloc(), which is true when
773 * MYMALLOC is set.
774 */
775 #if defined(PERL_SYS_INIT3) && !defined(MYMALLOC)
776 {
777 static int perl_sys_init_done;
778
779 /* only call this the first time through, as per perlembed man page */
780 if (!perl_sys_init_done)
781 {
782 char *dummy_env[1] = {NULL};
783
784 PERL_SYS_INIT3(&nargs, (char ***) &embedding, (char ***) &dummy_env);
785
786 /*
787 * For unclear reasons, PERL_SYS_INIT3 sets the SIGFPE handler to
788 * SIG_IGN. Aside from being extremely unfriendly behavior for a
789 * library, this is dumb on the grounds that the results of a
790 * SIGFPE in this state are undefined according to POSIX, and in
791 * fact you get a forced process kill at least on Linux. Hence,
792 * restore the SIGFPE handler to the backend's standard setting.
793 * (See Perl bug 114574 for more information.)
794 */
795 pqsignal(SIGFPE, FloatExceptionHandler);
796
797 perl_sys_init_done = 1;
798 /* quiet warning if PERL_SYS_INIT3 doesn't use the third argument */
799 dummy_env[0] = NULL;
800 }
801 }
802 #endif
803
804 plperl = perl_alloc();
805 if (!plperl)
806 elog(ERROR, "could not allocate Perl interpreter");
807
808 PERL_SET_CONTEXT(plperl);
809 perl_construct(plperl);
810
811 /*
812 * Run END blocks in perl_destruct instead of perl_run. Note that dTHX
813 * loads up a pointer to the current interpreter, so we have to postpone
814 * it to here rather than put it at the function head.
815 */
816 {
817 dTHX;
818
819 PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
820
821 /*
822 * Record the original function for the 'require' and 'dofile'
823 * opcodes. (They share the same implementation.) Ensure it's used
824 * for new interpreters.
825 */
826 if (!pp_require_orig)
827 pp_require_orig = PL_ppaddr[OP_REQUIRE];
828 else
829 {
830 PL_ppaddr[OP_REQUIRE] = pp_require_orig;
831 PL_ppaddr[OP_DOFILE] = pp_require_orig;
832 }
833
834 #ifdef PLPERL_ENABLE_OPMASK_EARLY
835
836 /*
837 * For regression testing to prove that the PLC_PERLBOOT and
838 * PLC_TRUSTED code doesn't even compile any unsafe ops. In future
839 * there may be a valid need for them to do so, in which case this
840 * could be softened (perhaps moved to plperl_trusted_init()) or
841 * removed.
842 */
843 PL_op_mask = plperl_opmask;
844 #endif
845
846 if (perl_parse(plperl, plperl_init_shared_libs,
847 nargs, embedding, NULL) != 0)
848 ereport(ERROR,
849 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
850 errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV))),
851 errcontext("while parsing Perl initialization")));
852
853 if (perl_run(plperl) != 0)
854 ereport(ERROR,
855 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
856 errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV))),
857 errcontext("while running Perl initialization")));
858
859 #ifdef PLPERL_RESTORE_LOCALE
860 PLPERL_RESTORE_LOCALE(LC_COLLATE, save_collate);
861 PLPERL_RESTORE_LOCALE(LC_CTYPE, save_ctype);
862 PLPERL_RESTORE_LOCALE(LC_MONETARY, save_monetary);
863 PLPERL_RESTORE_LOCALE(LC_NUMERIC, save_numeric);
864 PLPERL_RESTORE_LOCALE(LC_TIME, save_time);
865 #endif
866 }
867
868 return plperl;
869 }
870
871
872 /*
873 * Our safe implementation of the require opcode.
874 * This is safe because it's completely unable to load any code.
875 * If the requested file/module has already been loaded it'll return true.
876 * If not, it'll die.
877 * So now "use Foo;" will work iff Foo has already been loaded.
878 */
879 static OP *
880 pp_require_safe(pTHX)
881 {
882 dVAR;
883 dSP;
884 SV *sv,
885 **svp;
886 char *name;
887 STRLEN len;
888
889 sv = POPs;
890 name = SvPV(sv, len);
891 if (!(name && len > 0 && *name))
892 RETPUSHNO;
893
894 svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
895 if (svp && *svp != &PL_sv_undef)
896 RETPUSHYES;
897
898 DIE(aTHX_ "Unable to load %s into plperl", name);
899
900 /*
901 * In most Perl versions, DIE() expands to a return statement, so the next
902 * line is not necessary. But in versions between but not including
903 * 5.11.1 and 5.13.3 it does not, so the next line is necessary to avoid a
904 * "control reaches end of non-void function" warning from gcc. Other
905 * compilers such as Solaris Studio will, however, issue a "statement not
906 * reached" warning instead.
907 */
908 return NULL;
909 }
910
911
912 /*
913 * Destroy one Perl interpreter ... actually we just run END blocks.
914 *
915 * Caller must have ensured this interpreter is the active one.
916 */
917 static void
918 plperl_destroy_interp(PerlInterpreter **interp)
919 {
920 if (interp && *interp)
921 {
922 /*
923 * Only a very minimal destruction is performed: - just call END
924 * blocks.
925 *
926 * We could call perl_destruct() but we'd need to audit its actions
927 * very carefully and work-around any that impact us. (Calling
928 * sv_clean_objs() isn't an option because it's not part of perl's
929 * public API so isn't portably available.) Meanwhile END blocks can
930 * be used to perform manual cleanup.
931 */
932 dTHX;
933
934 /* Run END blocks - based on perl's perl_destruct() */
935 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END)
936 {
937 dJMPENV;
938 int x = 0;
939
940 JMPENV_PUSH(x);
941 PERL_UNUSED_VAR(x);
942 if (PL_endav && !PL_minus_c)
943 call_list(PL_scopestack_ix, PL_endav);
944 JMPENV_POP;
945 }
946 LEAVE;
947 FREETMPS;
948
949 *interp = NULL;
950 }
951 }
952
953 /*
954 * Initialize the current Perl interpreter as a trusted interp
955 */
956 static void
957 plperl_trusted_init(void)
958 {
959 dTHX;
960 HV *stash;
961 SV *sv;
962 char *key;
963 I32 klen;
964
965 /* use original require while we set up */
966 PL_ppaddr[OP_REQUIRE] = pp_require_orig;
967 PL_ppaddr[OP_DOFILE] = pp_require_orig;
968
969 eval_pv(PLC_TRUSTED, FALSE);
970 if (SvTRUE(ERRSV))
971 ereport(ERROR,
972 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
973 errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV))),
974 errcontext("while executing PLC_TRUSTED")));
975
976 /*
977 * Force loading of utf8 module now to prevent errors that can arise from
978 * the regex code later trying to load utf8 modules. See
979 * http://rt.perl.org/rt3/Ticket/Display.html?id=47576
980 */
981 eval_pv("my $a=chr(0x100); return $a =~ /\\xa9/i", FALSE);
982 if (SvTRUE(ERRSV))
983 ereport(ERROR,
984 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
985 errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV))),
986 errcontext("while executing utf8fix")));
987
988 /*
989 * Lock down the interpreter
990 */
991
992 /* switch to the safe require/dofile opcode for future code */
993 PL_ppaddr[OP_REQUIRE] = pp_require_safe;
994 PL_ppaddr[OP_DOFILE] = pp_require_safe;
995
996 /*
997 * prevent (any more) unsafe opcodes being compiled PL_op_mask is per
998 * interpreter, so this only needs to be set once
999 */
1000 PL_op_mask = plperl_opmask;
1001
1002 /* delete the DynaLoader:: namespace so extensions can't be loaded */
1003 stash = gv_stashpv("DynaLoader", GV_ADDWARN);
1004 hv_iterinit(stash);
1005 while ((sv = hv_iternextsv(stash, &key, &klen)))
1006 {
1007 if (!isGV_with_GP(sv) || !GvCV(sv))
1008 continue;
1009 SvREFCNT_dec(GvCV(sv)); /* free the CV */
1010 GvCV_set(sv, NULL); /* prevent call via GV */
1011 }
1012 hv_clear(stash);
1013
1014 /* invalidate assorted caches */
1015 ++PL_sub_generation;
1016 hv_clear(PL_stashcache);
1017
1018 /*
1019 * Execute plperl.on_plperl_init in the locked-down interpreter
1020 */
1021 if (plperl_on_plperl_init && *plperl_on_plperl_init)
1022 {
1023 eval_pv(plperl_on_plperl_init, FALSE);
1024 /* XXX need to find a way to determine a better errcode here */
1025 if (SvTRUE(ERRSV))
1026 ereport(ERROR,
1027 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
1028 errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV))),
1029 errcontext("while executing plperl.on_plperl_init")));
1030 }
1031 }
1032
1033
1034 /*
1035 * Initialize the current Perl interpreter as an untrusted interp
1036 */
1037 static void
1038 plperl_untrusted_init(void)
1039 {
1040 dTHX;
1041
1042 /*
1043 * Nothing to do except execute plperl.on_plperlu_init
1044 */
1045 if (plperl_on_plperlu_init && *plperl_on_plperlu_init)
1046 {
1047 eval_pv(plperl_on_plperlu_init, FALSE);
1048 if (SvTRUE(ERRSV))
1049 ereport(ERROR,
1050 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
1051 errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV))),
1052 errcontext("while executing plperl.on_plperlu_init")));
1053 }
1054 }
1055
1056
1057 /*
1058 * Perl likes to put a newline after its error messages; clean up such
1059 */
1060 static char *
1061 strip_trailing_ws(const char *msg)
1062 {
1063 char *res = pstrdup(msg);
1064 int len = strlen(res);
1065
1066 while (len > 0 && isspace((unsigned char) res[len - 1]))
1067 res[--len] = '\0';
1068 return res;
1069 }
1070
1071
1072 /* Build a tuple from a hash. */
1073
1074 static HeapTuple
1075 plperl_build_tuple_result(HV *perlhash, TupleDesc td)
1076 {
1077 dTHX;
1078 Datum *values;
1079 bool *nulls;
1080 HE *he;
1081 HeapTuple tup;
1082
1083 values = palloc0(sizeof(Datum) * td->natts);
1084 nulls = palloc(sizeof(bool) * td->natts);
1085 memset(nulls, true, sizeof(bool) * td->natts);
1086
1087 hv_iterinit(perlhash);
1088 while ((he = hv_iternext(perlhash)))
1089 {
1090 SV *val = HeVAL(he);
1091 char *key = hek2cstr(he);
1092 int attn = SPI_fnumber(td, key);
1093 Form_pg_attribute attr = TupleDescAttr(td, attn - 1);
1094
1095 if (attn == SPI_ERROR_NOATTRIBUTE)
1096 ereport(ERROR,
1097 (errcode(ERRCODE_UNDEFINED_COLUMN),
1098 errmsg("Perl hash contains nonexistent column \"%s\"",
1099 key)));
1100 if (attn <= 0)
1101 ereport(ERROR,
1102 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1103 errmsg("cannot set system attribute \"%s\"",
1104 key)));
1105
1106 values[attn - 1] = plperl_sv_to_datum(val,
1107 attr->atttypid,
1108 attr->atttypmod,
1109 NULL,
1110 NULL,
1111 InvalidOid,
1112 &nulls[attn - 1]);
1113
1114 pfree(key);
1115 }
1116 hv_iterinit(perlhash);
1117
1118 tup = heap_form_tuple(td, values, nulls);
1119 pfree(values);
1120 pfree(nulls);
1121 return tup;
1122 }
1123
1124 /* convert a hash reference to a datum */
1125 static Datum
1126 plperl_hash_to_datum(SV *src, TupleDesc td)
1127 {
1128 HeapTuple tup = plperl_build_tuple_result((HV *) SvRV(src), td);
1129
1130 return HeapTupleGetDatum(tup);
1131 }
1132
1133 /*
1134 * if we are an array ref return the reference. this is special in that if we
1135 * are a PostgreSQL::InServer::ARRAY object we will return the 'magic' array.
1136 */
1137 static SV *
1138 get_perl_array_ref(SV *sv)
1139 {
1140 dTHX;
1141
1142 if (SvOK(sv) && SvROK(sv))
1143 {
1144 if (SvTYPE(SvRV(sv)) == SVt_PVAV)
1145 return sv;
1146 else if (sv_isa(sv, "PostgreSQL::InServer::ARRAY"))
1147 {
1148 HV *hv = (HV *) SvRV(sv);
1149 SV **sav = hv_fetch_string(hv, "array");
1150
1151 if (*sav && SvOK(*sav) && SvROK(*sav) &&
1152 SvTYPE(SvRV(*sav)) == SVt_PVAV)
1153 return *sav;
1154
1155 elog(ERROR, "could not get array reference from PostgreSQL::InServer::ARRAY object");
1156 }
1157 }
1158 return NULL;
1159 }
1160
1161 /*
1162 * helper function for plperl_array_to_datum, recurses for multi-D arrays
1163 */
1164 static void
1165 array_to_datum_internal(AV *av, ArrayBuildState *astate,
1166 int *ndims, int *dims, int cur_depth,
1167 Oid arraytypid, Oid elemtypid, int32 typmod,
1168 FmgrInfo *finfo, Oid typioparam)
1169 {
1170 dTHX;
1171 int i;
1172 int len = av_len(av) + 1;
1173
1174 for (i = 0; i < len; i++)
1175 {
1176 /* fetch the array element */
1177 SV **svp = av_fetch(av, i, FALSE);
1178
1179 /* see if this element is an array, if so get that */
1180 SV *sav = svp ? get_perl_array_ref(*svp) : NULL;
1181
1182 /* multi-dimensional array? */
1183 if (sav)
1184 {
1185 AV *nav = (AV *) SvRV(sav);
1186
1187 /* dimensionality checks */
1188 if (cur_depth + 1 > MAXDIM)
1189 ereport(ERROR,
1190 (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
1191 errmsg("number of array dimensions (%d) exceeds the maximum allowed (%d)",
1192 cur_depth + 1, MAXDIM)));
1193
1194 /* set size when at first element in this level, else compare */
1195 if (i == 0 && *ndims == cur_depth)
1196 {
1197 dims[*ndims] = av_len(nav) + 1;
1198 (*ndims)++;
1199 }
1200 else if (av_len(nav) + 1 != dims[cur_depth])
1201 ereport(ERROR,
1202 (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
1203 errmsg("multidimensional arrays must have array expressions with matching dimensions")));
1204
1205 /* recurse to fetch elements of this sub-array */
1206 array_to_datum_internal(nav, astate,
1207 ndims, dims, cur_depth + 1,
1208 arraytypid, elemtypid, typmod,
1209 finfo, typioparam);
1210 }
1211 else
1212 {
1213 Datum dat;
1214 bool isnull;
1215
1216 /* scalar after some sub-arrays at same level? */
1217 if (*ndims != cur_depth)
1218 ereport(ERROR,
1219 (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
1220 errmsg("multidimensional arrays must have array expressions with matching dimensions")));
1221
1222 dat = plperl_sv_to_datum(svp ? *svp : NULL,
1223 elemtypid,
1224 typmod,
1225 NULL,
1226 finfo,
1227 typioparam,
1228 &isnull);
1229
1230 (void) accumArrayResult(astate, dat, isnull,
1231 elemtypid, CurrentMemoryContext);
1232 }
1233 }
1234 }
1235
1236 /*
1237 * convert perl array ref to a datum
1238 */
1239 static Datum
1240 plperl_array_to_datum(SV *src, Oid typid, int32 typmod)
1241 {
1242 dTHX;
1243 ArrayBuildState *astate;
1244 Oid elemtypid;
1245 FmgrInfo finfo;
1246 Oid typioparam;
1247 int dims[MAXDIM];
1248 int lbs[MAXDIM];
1249 int ndims = 1;
1250 int i;
1251
1252 elemtypid = get_element_type(typid);
1253 if (!elemtypid)
1254 ereport(ERROR,
1255 (errcode(ERRCODE_DATATYPE_MISMATCH),
1256 errmsg("cannot convert Perl array to non-array type %s",
1257 format_type_be(typid))));
1258
1259 astate = initArrayResult(elemtypid, CurrentMemoryContext, true);
1260
1261 _sv_to_datum_finfo(elemtypid, &finfo, &typioparam);
1262
1263 memset(dims, 0, sizeof(dims));
1264 dims[0] = av_len((AV *) SvRV(src)) + 1;
1265
1266 array_to_datum_internal((AV *) SvRV(src), astate,
1267 &ndims, dims, 1,
1268 typid, elemtypid, typmod,
1269 &finfo, typioparam);
1270
1271 /* ensure we get zero-D array for no inputs, as per PG convention */
1272 if (dims[0] <= 0)
1273 ndims = 0;
1274
1275 for (i = 0; i < ndims; i++)
1276 lbs[i] = 1;
1277
1278 return makeMdArrayResult(astate, ndims, dims, lbs,
1279 CurrentMemoryContext, true);
1280 }
1281
1282 /* Get the information needed to convert data to the specified PG type */
1283 static void
1284 _sv_to_datum_finfo(Oid typid, FmgrInfo *finfo, Oid *typioparam)
1285 {
1286 Oid typinput;
1287
1288 /* XXX would be better to cache these lookups */
1289 getTypeInputInfo(typid,
1290 &typinput, typioparam);
1291 fmgr_info(typinput, finfo);
1292 }
1293
1294 /*
1295 * convert Perl SV to PG datum of type typid, typmod typmod
1296 *
1297 * Pass the PL/Perl function's fcinfo when attempting to convert to the
1298 * function's result type; otherwise pass NULL. This is used when we need to
1299 * resolve the actual result type of a function returning RECORD.
1300 *
1301 * finfo and typioparam should be the results of _sv_to_datum_finfo for the
1302 * given typid, or NULL/InvalidOid to let this function do the lookups.
1303 *
1304 * *isnull is an output parameter.
1305 */
1306 static Datum
1307 plperl_sv_to_datum(SV *sv, Oid typid, int32 typmod,
1308 FunctionCallInfo fcinfo,
1309 FmgrInfo *finfo, Oid typioparam,
1310 bool *isnull)
1311 {
1312 FmgrInfo tmp;
1313 Oid funcid;
1314
1315 /* we might recurse */
1316 check_stack_depth();
1317
1318 *isnull = false;
1319
1320 /*
1321 * Return NULL if result is undef, or if we're in a function returning
1322 * VOID. In the latter case, we should pay no attention to the last Perl
1323 * statement's result, and this is a convenient means to ensure that.
1324 */
1325 if (!sv || !SvOK(sv) || typid == VOIDOID)
1326 {
1327 /* look up type info if they did not pass it */
1328 if (!finfo)
1329 {
1330 _sv_to_datum_finfo(typid, &tmp, &typioparam);
1331 finfo = &tmp;
1332 }
1333 *isnull = true;
1334 /* must call typinput in case it wants to reject NULL */
1335 return InputFunctionCall(finfo, NULL, typioparam, typmod);
1336 }
1337 else if ((funcid = get_transform_tosql(typid, current_call_data->prodesc->lang_oid, current_call_data->prodesc->trftypes)))
1338 return OidFunctionCall1(funcid, PointerGetDatum(sv));
1339 else if (SvROK(sv))
1340 {
1341 /* handle references */
1342 SV *sav = get_perl_array_ref(sv);
1343
1344 if (sav)
1345 {
1346 /* handle an arrayref */
1347 return plperl_array_to_datum(sav, typid, typmod);
1348 }
1349 else if (SvTYPE(SvRV(sv)) == SVt_PVHV)
1350 {
1351 /* handle a hashref */
1352 Datum ret;
1353 TupleDesc td;
1354 bool isdomain;
1355
1356 if (!type_is_rowtype(typid))
1357 ereport(ERROR,
1358 (errcode(ERRCODE_DATATYPE_MISMATCH),
1359 errmsg("cannot convert Perl hash to non-composite type %s",
1360 format_type_be(typid))));
1361
1362 td = lookup_rowtype_tupdesc_domain(typid, typmod, true);
1363 if (td != NULL)
1364 {
1365 /* Did we look through a domain? */
1366 isdomain = (typid != td->tdtypeid);
1367 }
1368 else
1369 {
1370 /* Must be RECORD, try to resolve based on call info */
1371 TypeFuncClass funcclass;
1372
1373 if (fcinfo)
1374 funcclass = get_call_result_type(fcinfo, &typid, &td);
1375 else
1376 funcclass = TYPEFUNC_OTHER;
1377 if (funcclass != TYPEFUNC_COMPOSITE &&
1378 funcclass != TYPEFUNC_COMPOSITE_DOMAIN)
1379 ereport(ERROR,
1380 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1381 errmsg("function returning record called in context "
1382 "that cannot accept type record")));
1383 Assert(td);
1384 isdomain = (funcclass == TYPEFUNC_COMPOSITE_DOMAIN);
1385 }
1386
1387 ret = plperl_hash_to_datum(sv, td);
1388
1389 if (isdomain)
1390 domain_check(ret, false, typid, NULL, NULL);
1391
1392 /* Release on the result of get_call_result_type is harmless */
1393 ReleaseTupleDesc(td);
1394
1395 return ret;
1396 }
1397
1398 /*
1399 * If it's a reference to something else, such as a scalar, just
1400 * recursively look through the reference.
1401 */
1402 return plperl_sv_to_datum(SvRV(sv), typid, typmod,
1403 fcinfo, finfo, typioparam,
1404 isnull);
1405 }
1406 else
1407 {
1408 /* handle a string/number */
1409 Datum ret;
1410 char *str = sv2cstr(sv);
1411
1412 /* did not pass in any typeinfo? look it up */
1413 if (!finfo)
1414 {
1415 _sv_to_datum_finfo(typid, &tmp, &typioparam);
1416 finfo = &tmp;
1417 }
1418
1419 ret = InputFunctionCall(finfo, str, typioparam, typmod);
1420 pfree(str);
1421
1422 return ret;
1423 }
1424 }
1425
1426 /* Convert the perl SV to a string returned by the type output function */
1427 char *
1428 plperl_sv_to_literal(SV *sv, char *fqtypename)
1429 {
1430 Datum str = CStringGetDatum(fqtypename);
1431 Oid typid = DirectFunctionCall1(regtypein, str);
1432 Oid typoutput;
1433 Datum datum;
1434 bool typisvarlena,
1435 isnull;
1436
1437 if (!OidIsValid(typid))
1438 ereport(ERROR,
1439 (errcode(ERRCODE_UNDEFINED_OBJECT),
1440 errmsg("lookup failed for type %s", fqtypename)));
1441
1442 datum = plperl_sv_to_datum(sv,
1443 typid, -1,
1444 NULL, NULL, InvalidOid,
1445 &isnull);
1446
1447 if (isnull)
1448 return NULL;
1449
1450 getTypeOutputInfo(typid,
1451 &typoutput, &typisvarlena);
1452
1453 return OidOutputFunctionCall(typoutput, datum);
1454 }
1455
1456 /*
1457 * Convert PostgreSQL array datum to a perl array reference.
1458 *
1459 * typid is arg's OID, which must be an array type.
1460 */
1461 static SV *
1462 plperl_ref_from_pg_array(Datum arg, Oid typid)
1463 {
1464 dTHX;
1465 ArrayType *ar = DatumGetArrayTypeP(arg);
1466 Oid elementtype = ARR_ELEMTYPE(ar);
1467 int16 typlen;
1468 bool typbyval;
1469 char typalign,
1470 typdelim;
1471 Oid typioparam;
1472 Oid typoutputfunc;
1473 Oid transform_funcid;
1474 int i,
1475 nitems,
1476 *dims;
1477 plperl_array_info *info;
1478 SV *av;
1479 HV *hv;
1480
1481 /*
1482 * Currently we make no effort to cache any of the stuff we look up here,
1483 * which is bad.
1484 */
1485 info = palloc0(sizeof(plperl_array_info));
1486
1487 /* get element type information, including output conversion function */
1488 get_type_io_data(elementtype, IOFunc_output,
1489 &typlen, &typbyval, &typalign,
1490 &typdelim, &typioparam, &typoutputfunc);
1491
1492 /* Check for a transform function */
1493 transform_funcid = get_transform_fromsql(elementtype,
1494 current_call_data->prodesc->lang_oid,
1495 current_call_data->prodesc->trftypes);
1496
1497 /* Look up transform or output function as appropriate */
1498 if (OidIsValid(transform_funcid))
1499 fmgr_info(transform_funcid, &info->transform_proc);
1500 else
1501 fmgr_info(typoutputfunc, &info->proc);
1502
1503 info->elem_is_rowtype = type_is_rowtype(elementtype);
1504
1505 /* Get the number and bounds of array dimensions */
1506 info->ndims = ARR_NDIM(ar);
1507 dims = ARR_DIMS(ar);
1508
1509 /* No dimensions? Return an empty array */
1510 if (info->ndims == 0)
1511 {
1512 av = newRV_noinc((SV *) newAV());
1513 }
1514 else
1515 {
1516 deconstruct_array(ar, elementtype, typlen, typbyval,
1517 typalign, &info->elements, &info->nulls,
1518 &nitems);
1519
1520 /* Get total number of elements in each dimension */
1521 info->nelems = palloc(sizeof(int) * info->ndims);
1522 info->nelems[0] = nitems;
1523 for (i = 1; i < info->ndims; i++)
1524 info->nelems[i] = info->nelems[i - 1] / dims[i - 1];
1525
1526 av = split_array(info, 0, nitems, 0);
1527 }
1528
1529 hv = newHV();
1530 (void) hv_store(hv, "array", 5, av, 0);
1531 (void) hv_store(hv, "typeoid", 7, newSVuv(typid), 0);
1532
1533 return sv_bless(newRV_noinc((SV *) hv),
1534 gv_stashpv("PostgreSQL::InServer::ARRAY", 0));
1535 }
1536
1537 /*
1538 * Recursively form array references from splices of the initial array
1539 */
1540 static SV *
1541 split_array(plperl_array_info *info, int first, int last, int nest)
1542 {
1543 dTHX;
1544 int i;
1545 AV *result;
1546
1547 /* we should only be called when we have something to split */
1548 Assert(info->ndims > 0);
1549
1550 /* since this function recurses, it could be driven to stack overflow */
1551 check_stack_depth();
1552
1553 /*
1554 * Base case, return a reference to a single-dimensional array
1555 */
1556 if (nest >= info->ndims - 1)
1557 return make_array_ref(info, first, last);
1558
1559 result = newAV();
1560 for (i = first; i < last; i += info->nelems[nest + 1])
1561 {
1562 /* Recursively form references to arrays of lower dimensions */
1563 SV *ref = split_array(info, i, i + info->nelems[nest + 1], nest + 1);
1564
1565 av_push(result, ref);
1566 }
1567 return newRV_noinc((SV *) result);
1568 }
1569
1570 /*
1571 * Create a Perl reference from a one-dimensional C array, converting
1572 * composite type elements to hash references.
1573 */
1574 static SV *
1575 make_array_ref(plperl_array_info *info, int first, int last)
1576 {
1577 dTHX;
1578 int i;
1579 AV *result = newAV();
1580
1581 for (i = first; i < last; i++)
1582 {
1583 if (info->nulls[i])
1584 {
1585 /*
1586 * We can't use &PL_sv_undef here. See "AVs, HVs and undefined
1587 * values" in perlguts.
1588 */
1589 av_push(result, newSV(0));
1590 }
1591 else
1592 {
1593 Datum itemvalue = info->elements[i];
1594
1595 if (info->transform_proc.fn_oid)
1596 av_push(result, (SV *) DatumGetPointer(FunctionCall1(&info->transform_proc, itemvalue)));
1597 else if (info->elem_is_rowtype)
1598 /* Handle composite type elements */
1599 av_push(result, plperl_hash_from_datum(itemvalue));
1600 else
1601 {
1602 char *val = OutputFunctionCall(&info->proc, itemvalue);
1603
1604 av_push(result, cstr2sv(val));
1605 }
1606 }
1607 }
1608 return newRV_noinc((SV *) result);
1609 }
1610
1611 /* Set up the arguments for a trigger call. */
1612 static SV *
1613 plperl_trigger_build_args(FunctionCallInfo fcinfo)
1614 {
1615 dTHX;
1616 TriggerData *tdata;
1617 TupleDesc tupdesc;
1618 int i;
1619 char *level;
1620 char *event;
1621 char *relid;
1622 char *when;
1623 HV *hv;
1624
1625 hv = newHV();
1626 hv_ksplit(hv, 12); /* pre-grow the hash */
1627
1628 tdata = (TriggerData *) fcinfo->context;
1629 tupdesc = tdata->tg_relation->rd_att;
1630
1631 relid = DatumGetCString(DirectFunctionCall1(oidout,
1632 ObjectIdGetDatum(tdata->tg_relation->rd_id)));
1633
1634 hv_store_string(hv, "name", cstr2sv(tdata->tg_trigger->tgname));
1635 hv_store_string(hv, "relid", cstr2sv(relid));
1636
1637 /*
1638 * Note: In BEFORE trigger, stored generated columns are not computed yet,
1639 * so don't make them accessible in NEW row.
1640 */
1641
1642 if (TRIGGER_FIRED_BY_INSERT(tdata->tg_event))
1643 {
1644 event = "INSERT";
1645 if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
1646 hv_store_string(hv, "new",
1647 plperl_hash_from_tuple(tdata->tg_trigtuple,
1648 tupdesc,
1649 !TRIGGER_FIRED_BEFORE(tdata->tg_event)));
1650 }
1651 else if (TRIGGER_FIRED_BY_DELETE(tdata->tg_event))
1652 {
1653 event = "DELETE";
1654 if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
1655 hv_store_string(hv, "old",
1656 plperl_hash_from_tuple(tdata->tg_trigtuple,
1657 tupdesc,
1658 true));
1659 }
1660 else if (TRIGGER_FIRED_BY_UPDATE(tdata->tg_event))
1661 {
1662 event = "UPDATE";
1663 if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
1664 {
1665 hv_store_string(hv, "old",
1666 plperl_hash_from_tuple(tdata->tg_trigtuple,
1667 tupdesc,
1668 true));
1669 hv_store_string(hv, "new",
1670 plperl_hash_from_tuple(tdata->tg_newtuple,
1671 tupdesc,
1672 !TRIGGER_FIRED_BEFORE(tdata->tg_event)));
1673 }
1674 }
1675 else if (TRIGGER_FIRED_BY_TRUNCATE(tdata->tg_event))
1676 event = "TRUNCATE";
1677 else
1678 event = "UNKNOWN";
1679
1680 hv_store_string(hv, "event", cstr2sv(event));
1681 hv_store_string(hv, "argc", newSViv(tdata->tg_trigger->tgnargs));
1682
1683 if (tdata->tg_trigger->tgnargs > 0)
1684 {
1685 AV *av = newAV();
1686
1687 av_extend(av, tdata->tg_trigger->tgnargs);
1688 for (i = 0; i < tdata->tg_trigger->tgnargs; i++)
1689 av_push(av, cstr2sv(tdata->tg_trigger->tgargs[i]));
1690 hv_store_string(hv, "args", newRV_noinc((SV *) av));
1691 }
1692
1693 hv_store_string(hv, "relname",
1694 cstr2sv(SPI_getrelname(tdata->tg_relation)));
1695
1696 hv_store_string(hv, "table_name",
1697 cstr2sv(SPI_getrelname(tdata->tg_relation)));
1698
1699 hv_store_string(hv, "table_schema",
1700 cstr2sv(SPI_getnspname(tdata->tg_relation)));
1701
1702 if (TRIGGER_FIRED_BEFORE(tdata->tg_event))
1703 when = "BEFORE";
1704 else if (TRIGGER_FIRED_AFTER(tdata->tg_event))
1705 when = "AFTER";
1706 else if (TRIGGER_FIRED_INSTEAD(tdata->tg_event))
1707 when = "INSTEAD OF";
1708 else
1709 when = "UNKNOWN";
1710 hv_store_string(hv, "when", cstr2sv(when));
1711
1712 if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
1713 level = "ROW";
1714 else if (TRIGGER_FIRED_FOR_STATEMENT(tdata->tg_event))
1715 level = "STATEMENT";
1716 else
1717 level = "UNKNOWN";
1718 hv_store_string(hv, "level", cstr2sv(level));
1719
1720 return newRV_noinc((SV *) hv);
1721 }
1722
1723
1724 /* Set up the arguments for an event trigger call. */
1725 static SV *
1726 plperl_event_trigger_build_args(FunctionCallInfo fcinfo)
1727 {
1728 dTHX;
1729 EventTriggerData *tdata;
1730 HV *hv;
1731
1732 hv = newHV();
1733
1734 tdata = (EventTriggerData *) fcinfo->context;
1735
1736 hv_store_string(hv, "event", cstr2sv(tdata->event));
1737 hv_store_string(hv, "tag", cstr2sv(GetCommandTagName(tdata->tag)));
1738
1739 return newRV_noinc((SV *) hv);
1740 }
1741
1742 /* Construct the modified new tuple to be returned from a trigger. */
1743 static HeapTuple
1744 plperl_modify_tuple(HV *hvTD, TriggerData *tdata, HeapTuple otup)
1745 {
1746 dTHX;
1747 SV **svp;
1748 HV *hvNew;
1749 HE *he;
1750 HeapTuple rtup;
1751 TupleDesc tupdesc;
1752 int natts;
1753 Datum *modvalues;
1754 bool *modnulls;
1755 bool *modrepls;
1756
1757 svp = hv_fetch_string(hvTD, "new");
1758 if (!svp)
1759 ereport(ERROR,
1760 (errcode(ERRCODE_UNDEFINED_COLUMN),
1761 errmsg("$_TD->{new} does not exist")));
1762 if (!SvOK(*svp) || !SvROK(*svp) || SvTYPE(SvRV(*svp)) != SVt_PVHV)
1763 ereport(ERROR,
1764 (errcode(ERRCODE_DATATYPE_MISMATCH),
1765 errmsg("$_TD->{new} is not a hash reference")));
1766 hvNew = (HV *) SvRV(*svp);
1767
1768 tupdesc = tdata->tg_relation->rd_att;
1769 natts = tupdesc->natts;
1770
1771 modvalues = (Datum *) palloc0(natts * sizeof(Datum));
1772 modnulls = (bool *) palloc0(natts * sizeof(bool));
1773 modrepls = (bool *) palloc0(natts * sizeof(bool));
1774
1775 hv_iterinit(hvNew);
1776 while ((he = hv_iternext(hvNew)))
1777 {
1778 char *key = hek2cstr(he);
1779 SV *val = HeVAL(he);
1780 int attn = SPI_fnumber(tupdesc, key);
1781 Form_pg_attribute attr = TupleDescAttr(tupdesc, attn - 1);
1782
1783 if (attn == SPI_ERROR_NOATTRIBUTE)
1784 ereport(ERROR,
1785 (errcode(ERRCODE_UNDEFINED_COLUMN),
1786 errmsg("Perl hash contains nonexistent column \"%s\"",
1787 key)));
1788 if (attn <= 0)
1789 ereport(ERROR,
1790 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1791 errmsg("cannot set system attribute \"%s\"",
1792 key)));
1793 if (attr->attgenerated)
1794 ereport(ERROR,
1795 (errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
1796 errmsg("cannot set generated column \"%s\"",
1797 key)));
1798
1799 modvalues[attn - 1] = plperl_sv_to_datum(val,
1800 attr->atttypid,
1801 attr->atttypmod,
1802 NULL,
1803 NULL,
1804 InvalidOid,
1805 &modnulls[attn - 1]);
1806 modrepls[attn - 1] = true;
1807
1808 pfree(key);
1809 }
1810 hv_iterinit(hvNew);
1811
1812 rtup = heap_modify_tuple(otup, tupdesc, modvalues, modnulls, modrepls);
1813
1814 pfree(modvalues);
1815 pfree(modnulls);
1816 pfree(modrepls);
1817
1818 return rtup;
1819 }
1820
1821
1822 /*
1823 * There are three externally visible pieces to plperl: plperl_call_handler,
1824 * plperl_inline_handler, and plperl_validator.
1825 */
1826
1827 /*
1828 * The call handler is called to run normal functions (including trigger
1829 * functions) that are defined in pg_proc.
1830 */
1831 PG_FUNCTION_INFO_V1(plperl_call_handler);
1832
1833 Datum
1834 plperl_call_handler(PG_FUNCTION_ARGS)
1835 {
1836 Datum retval = (Datum) 0;
1837 plperl_call_data *volatile save_call_data = current_call_data;
1838 plperl_interp_desc *volatile oldinterp = plperl_active_interp;
1839 plperl_call_data this_call_data;
1840
1841 /* Initialize current-call status record */
1842 MemSet(&this_call_data, 0, sizeof(this_call_data));
1843 this_call_data.fcinfo = fcinfo;
1844
1845 PG_TRY();
1846 {
1847 current_call_data = &this_call_data;
1848 if (CALLED_AS_TRIGGER(fcinfo))
1849 retval = PointerGetDatum(plperl_trigger_handler(fcinfo));
1850 else if (CALLED_AS_EVENT_TRIGGER(fcinfo))
1851 {
1852 plperl_event_trigger_handler(fcinfo);
1853 retval = (Datum) 0;
1854 }
1855 else
1856 retval = plperl_func_handler(fcinfo);
1857 }
1858 PG_FINALLY();
1859 {
1860 current_call_data = save_call_data;
1861 activate_interpreter(oldinterp);
1862 if (this_call_data.prodesc)
1863 decrement_prodesc_refcount(this_call_data.prodesc);
1864 }
1865 PG_END_TRY();
1866
1867 return retval;
1868 }
1869
1870 /*
1871 * The inline handler runs anonymous code blocks (DO blocks).
1872 */
1873 PG_FUNCTION_INFO_V1(plperl_inline_handler);
1874
1875 Datum
1876 plperl_inline_handler(PG_FUNCTION_ARGS)
1877 {
1878 LOCAL_FCINFO(fake_fcinfo, 0);
1879 InlineCodeBlock *codeblock = (InlineCodeBlock *) PG_GETARG_POINTER(0);
1880 FmgrInfo flinfo;
1881 plperl_proc_desc desc;
1882 plperl_call_data *volatile save_call_data = current_call_data;
1883 plperl_interp_desc *volatile oldinterp = plperl_active_interp;
1884 plperl_call_data this_call_data;
1885 ErrorContextCallback pl_error_context;
1886
1887 /* Initialize current-call status record */
1888 MemSet(&this_call_data, 0, sizeof(this_call_data));
1889
1890 /* Set up a callback for error reporting */
1891 pl_error_context.callback = plperl_inline_callback;
1892 pl_error_context.previous = error_context_stack;
1893 pl_error_context.arg = NULL;
1894 error_context_stack = &pl_error_context;
1895
1896 /*
1897 * Set up a fake fcinfo and descriptor with just enough info to satisfy
1898 * plperl_call_perl_func(). In particular note that this sets things up
1899 * with no arguments passed, and a result type of VOID.
1900 */
1901 MemSet(fake_fcinfo, 0, SizeForFunctionCallInfo(0));
1902 MemSet(&flinfo, 0, sizeof(flinfo));
1903 MemSet(&desc, 0, sizeof(desc));
1904 fake_fcinfo->flinfo = &flinfo;
1905 flinfo.fn_oid = InvalidOid;
1906 flinfo.fn_mcxt = CurrentMemoryContext;
1907
1908 desc.proname = "inline_code_block";
1909 desc.fn_readonly = false;
1910
1911 desc.lang_oid = codeblock->langOid;
1912 desc.trftypes = NIL;
1913 desc.lanpltrusted = codeblock->langIsTrusted;
1914
1915 desc.fn_retistuple = false;
1916 desc.fn_retisset = false;
1917 desc.fn_retisarray = false;
1918 desc.result_oid = InvalidOid;
1919 desc.nargs = 0;
1920 desc.reference = NULL;
1921
1922 this_call_data.fcinfo = fake_fcinfo;
1923 this_call_data.prodesc = &desc;
1924 /* we do not bother with refcounting the fake prodesc */
1925
1926 PG_TRY();
1927 {
1928 SV *perlret;
1929
1930 current_call_data = &this_call_data;
1931
1932 if (SPI_connect_ext(codeblock->atomic ? 0 : SPI_OPT_NONATOMIC) != SPI_OK_CONNECT)
1933 elog(ERROR, "could not connect to SPI manager");
1934
1935 select_perl_context(desc.lanpltrusted);
1936
1937 plperl_create_sub(&desc, codeblock->source_text, 0);
1938
1939 if (!desc.reference) /* can this happen? */
1940 elog(ERROR, "could not create internal procedure for anonymous code block");
1941
1942 perlret = plperl_call_perl_func(&desc, fake_fcinfo);
1943
1944 SvREFCNT_dec_current(perlret);
1945
1946 if (SPI_finish() != SPI_OK_FINISH)
1947 elog(ERROR, "SPI_finish() failed");
1948 }
1949 PG_FINALLY();
1950 {
1951 if (desc.reference)
1952 SvREFCNT_dec_current(desc.reference);
1953 current_call_data = save_call_data;
1954 activate_interpreter(oldinterp);
1955 }
1956 PG_END_TRY();
1957
1958 error_context_stack = pl_error_context.previous;
1959
1960 PG_RETURN_VOID();
1961 }
1962
1963 /*
1964 * The validator is called during CREATE FUNCTION to validate the function
1965 * being created/replaced. The precise behavior of the validator may be
1966 * modified by the check_function_bodies GUC.
1967 */
1968 PG_FUNCTION_INFO_V1(plperl_validator);
1969
1970 Datum
1971 plperl_validator(PG_FUNCTION_ARGS)
1972 {
1973 Oid funcoid = PG_GETARG_OID(0);
1974 HeapTuple tuple;
1975 Form_pg_proc proc;
1976 char functyptype;
1977 int numargs;
1978 Oid *argtypes;
1979 char **argnames;
1980 char *argmodes;
1981 bool is_trigger = false;
1982 bool is_event_trigger = false;
1983 int i;
1984
1985 if (!CheckFunctionValidatorAccess(fcinfo->flinfo->fn_oid, funcoid))
1986 PG_RETURN_VOID();
1987
1988 /* Get the new function's pg_proc entry */
1989 tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcoid));
1990 if (!HeapTupleIsValid(tuple))
1991 elog(ERROR, "cache lookup failed for function %u", funcoid);
1992 proc = (Form_pg_proc) GETSTRUCT(tuple);
1993
1994 functyptype = get_typtype(proc->prorettype);
1995
1996 /* Disallow pseudotype result */
1997 /* except for TRIGGER, EVTTRIGGER, RECORD, or VOID */
1998 if (functyptype == TYPTYPE_PSEUDO)
1999 {
2000 if (proc->prorettype == TRIGGEROID)
2001 is_trigger = true;
2002 else if (proc->prorettype == EVENT_TRIGGEROID)
2003 is_event_trigger = true;
2004 else if (proc->prorettype != RECORDOID &&
2005 proc->prorettype != VOIDOID)
2006 ereport(ERROR,
2007 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2008 errmsg("PL/Perl functions cannot return type %s",
2009 format_type_be(proc->prorettype))));
2010 }
2011
2012 /* Disallow pseudotypes in arguments (either IN or OUT) */
2013 numargs = get_func_arg_info(tuple,
2014 &argtypes, &argnames, &argmodes);
2015 for (i = 0; i < numargs; i++)
2016 {
2017 if (get_typtype(argtypes[i]) == TYPTYPE_PSEUDO &&
2018 argtypes[i] != RECORDOID)
2019 ereport(ERROR,
2020 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2021 errmsg("PL/Perl functions cannot accept type %s",
2022 format_type_be(argtypes[i]))));
2023 }
2024
2025 ReleaseSysCache(tuple);
2026
2027 /* Postpone body checks if !check_function_bodies */
2028 if (check_function_bodies)
2029 {
2030 (void) compile_plperl_function(funcoid, is_trigger, is_event_trigger);
2031 }
2032
2033 /* the result of a validator is ignored */
2034 PG_RETURN_VOID();
2035 }
2036
2037
2038 /*
2039 * plperlu likewise requires three externally visible functions:
2040 * plperlu_call_handler, plperlu_inline_handler, and plperlu_validator.
2041 * These are currently just aliases that send control to the plperl
2042 * handler functions, and we decide whether a particular function is
2043 * trusted or not by inspecting the actual pg_language tuple.
2044 */
2045
2046 PG_FUNCTION_INFO_V1(plperlu_call_handler);
2047
2048 Datum
2049 plperlu_call_handler(PG_FUNCTION_ARGS)
2050 {
2051 return plperl_call_handler(fcinfo);
2052 }
2053
2054 PG_FUNCTION_INFO_V1(plperlu_inline_handler);
2055
2056 Datum
2057 plperlu_inline_handler(PG_FUNCTION_ARGS)
2058 {
2059 return plperl_inline_handler(fcinfo);
2060 }
2061
2062 PG_FUNCTION_INFO_V1(plperlu_validator);
2063
2064 Datum
2065 plperlu_validator(PG_FUNCTION_ARGS)
2066 {
2067 /* call plperl validator with our fcinfo so it gets our oid */
2068 return plperl_validator(fcinfo);
2069 }
2070
2071
2072 /*
2073 * Uses mkfunc to create a subroutine whose text is
2074 * supplied in s, and returns a reference to it
2075 */
2076 static void
2077 plperl_create_sub(plperl_proc_desc *prodesc, const char *s, Oid fn_oid)
2078 {
2079 dTHX;
2080 dSP;
2081 char subname[NAMEDATALEN + 40];
2082 HV *pragma_hv = newHV();
2083 SV *subref = NULL;
2084 int count;
2085
2086 sprintf(subname, "%s__%u", prodesc->proname, fn_oid);
2087
2088 if (plperl_use_strict)
2089 hv_store_string(pragma_hv, "strict", (SV *) newAV());
2090
2091 ENTER;
2092 SAVETMPS;
2093 PUSHMARK(SP);
2094 EXTEND(SP, 4);
2095 PUSHs(sv_2mortal(cstr2sv(subname)));
2096 PUSHs(sv_2mortal(newRV_noinc((SV *) pragma_hv)));
2097
2098 /*
2099 * Use 'false' for $prolog in mkfunc, which is kept for compatibility in
2100 * case a module such as PostgreSQL::PLPerl::NYTprof replaces the function
2101 * compiler.
2102 */
2103 PUSHs(&PL_sv_no);
2104 PUSHs(sv_2mortal(cstr2sv(s)));
2105 PUTBACK;
2106
2107 /*
2108 * G_KEEPERR seems to be needed here, else we don't recognize compile
2109 * errors properly. Perhaps it's because there's another level of eval
2110 * inside mksafefunc?
2111 */
2112 count = perl_call_pv("PostgreSQL::InServer::mkfunc",
2113 G_SCALAR | G_EVAL | G_KEEPERR);
2114 SPAGAIN;
2115
2116 if (count == 1)
2117 {
2118 SV *sub_rv = (SV *) POPs;
2119
2120 if (sub_rv && SvROK(sub_rv) && SvTYPE(SvRV(sub_rv)) == SVt_PVCV)
2121 {
2122 subref = newRV_inc(SvRV(sub_rv));
2123 }
2124 }
2125
2126 PUTBACK;
2127 FREETMPS;
2128 LEAVE;
2129
2130 if (SvTRUE(ERRSV))
2131 ereport(ERROR,
2132 (errcode(ERRCODE_SYNTAX_ERROR),
2133 errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV)))));
2134
2135 if (!subref)
2136 ereport(ERROR,
2137 (errcode(ERRCODE_SYNTAX_ERROR),
2138 errmsg("didn't get a CODE reference from compiling function \"%s\"",
2139 prodesc->proname)));
2140
2141 prodesc->reference = subref;
2142 }
2143
2144
2145 /**********************************************************************
2146 * plperl_init_shared_libs() -
2147 **********************************************************************/
2148
2149 static void
2150 plperl_init_shared_libs(pTHX)
2151 {
2152 char *file = __FILE__;
2153
2154 newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
2155 newXS("PostgreSQL::InServer::Util::bootstrap",
2156 boot_PostgreSQL__InServer__Util, file);
2157 /* newXS for...::SPI::bootstrap is in select_perl_context() */
2158 }
2159
2160
2161 static SV *
2162 plperl_call_perl_func(plperl_proc_desc *desc, FunctionCallInfo fcinfo)
2163 {
2164 dTHX;
2165 dSP;
2166 SV *retval;
2167 int i;
2168 int count;
2169 Oid *argtypes = NULL;
2170 int nargs = 0;
2171
2172 ENTER;
2173 SAVETMPS;
2174
2175 PUSHMARK(SP);
2176 EXTEND(sp, desc->nargs);
2177
2178 /* Get signature for true functions; inline blocks have no args. */
2179 if (fcinfo->flinfo->fn_oid)
2180 get_func_signature(fcinfo->flinfo->fn_oid, &argtypes, &nargs);
2181 Assert(nargs == desc->nargs);
2182
2183 for (i = 0; i < desc->nargs; i++)
2184 {
2185 if (fcinfo->args[i].isnull)
2186 PUSHs(&PL_sv_undef);
2187 else if (desc->arg_is_rowtype[i])
2188 {
2189 SV *sv = plperl_hash_from_datum(fcinfo->args[i].value);
2190
2191 PUSHs(sv_2mortal(sv));
2192 }
2193 else
2194 {
2195 SV *sv;
2196 Oid funcid;
2197
2198 if (OidIsValid(desc->arg_arraytype[i]))
2199 sv = plperl_ref_from_pg_array(fcinfo->args[i].value, desc->arg_arraytype[i]);
2200 else if ((funcid = get_transform_fromsql(argtypes[i], current_call_data->prodesc->lang_oid, current_call_data->prodesc->trftypes)))
2201 sv = (SV *) DatumGetPointer(OidFunctionCall1(funcid, fcinfo->args[i].value));
2202 else
2203 {
2204 char *tmp;
2205
2206 tmp = OutputFunctionCall(&(desc->arg_out_func[i]),
2207 fcinfo->args[i].value);
2208 sv = cstr2sv(tmp);
2209 pfree(tmp);
2210 }
2211
2212 PUSHs(sv_2mortal(sv));
2213 }
2214 }
2215 PUTBACK;
2216
2217 /* Do NOT use G_KEEPERR here */
2218 count = perl_call_sv(desc->reference, G_SCALAR | G_EVAL);
2219
2220 SPAGAIN;
2221
2222 if (count != 1)
2223 {
2224 PUTBACK;
2225 FREETMPS;
2226 LEAVE;
2227 ereport(ERROR,
2228 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2229 errmsg("didn't get a return item from function")));
2230 }
2231
2232 if (SvTRUE(ERRSV))
2233 {
2234 (void) POPs;
2235 PUTBACK;
2236 FREETMPS;
2237 LEAVE;
2238 /* XXX need to find a way to determine a better errcode here */
2239 ereport(ERROR,
2240 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2241 errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV)))));
2242 }
2243
2244 retval = newSVsv(POPs);
2245
2246 PUTBACK;
2247 FREETMPS;
2248 LEAVE;
2249
2250 return retval;
2251 }
2252
2253
2254 static SV *
2255 plperl_call_perl_trigger_func(plperl_proc_desc *desc, FunctionCallInfo fcinfo,
2256 SV *td)
2257 {
2258 dTHX;
2259 dSP;
2260 SV *retval,
2261 *TDsv;
2262 int i,
2263 count;
2264 Trigger *tg_trigger = ((TriggerData *) fcinfo->context)->tg_trigger;
2265
2266 ENTER;
2267 SAVETMPS;
2268
2269 TDsv = get_sv("main::_TD", 0);
2270 if (!TDsv)
2271 ereport(ERROR,
2272 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2273 errmsg("couldn't fetch $_TD")));
2274
2275 save_item(TDsv); /* local $_TD */
2276 sv_setsv(TDsv, td);
2277
2278 PUSHMARK(sp);
2279 EXTEND(sp, tg_trigger->tgnargs);
2280
2281 for (i = 0; i < tg_trigger->tgnargs; i++)
2282 PUSHs(sv_2mortal(cstr2sv(tg_trigger->tgargs[i])));
2283 PUTBACK;
2284
2285 /* Do NOT use G_KEEPERR here */
2286 count = perl_call_sv(desc->reference, G_SCALAR | G_EVAL);
2287
2288 SPAGAIN;
2289
2290 if (count != 1)
2291 {
2292 PUTBACK;
2293 FREETMPS;
2294 LEAVE;
2295 ereport(ERROR,
2296 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2297 errmsg("didn't get a return item from trigger function")));
2298 }
2299
2300 if (SvTRUE(ERRSV))
2301 {
2302 (void) POPs;
2303 PUTBACK;
2304 FREETMPS;
2305 LEAVE;
2306 /* XXX need to find a way to determine a better errcode here */
2307 ereport(ERROR,
2308 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2309 errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV)))));
2310 }
2311
2312 retval = newSVsv(POPs);
2313
2314 PUTBACK;
2315 FREETMPS;
2316 LEAVE;
2317
2318 return retval;
2319 }
2320
2321
2322 static void
2323 plperl_call_perl_event_trigger_func(plperl_proc_desc *desc,
2324 FunctionCallInfo fcinfo,
2325 SV *td)
2326 {
2327 dTHX;
2328 dSP;
2329 SV *retval,
2330 *TDsv;
2331 int count;
2332
2333 ENTER;
2334 SAVETMPS;
2335
2336 TDsv = get_sv("main::_TD", 0);
2337 if (!TDsv)
2338 ereport(ERROR,
2339 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2340 errmsg("couldn't fetch $_TD")));
2341
2342 save_item(TDsv); /* local $_TD */
2343 sv_setsv(TDsv, td);
2344
2345 PUSHMARK(sp);
2346 PUTBACK;
2347
2348 /* Do NOT use G_KEEPERR here */
2349 count = perl_call_sv(desc->reference, G_SCALAR | G_EVAL);
2350
2351 SPAGAIN;
2352
2353 if (count != 1)
2354 {
2355 PUTBACK;
2356 FREETMPS;
2357 LEAVE;
2358 ereport(ERROR,
2359 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2360 errmsg("didn't get a return item from trigger function")));
2361 }
2362
2363 if (SvTRUE(ERRSV))
2364 {
2365 (void) POPs;
2366 PUTBACK;
2367 FREETMPS;
2368 LEAVE;
2369 /* XXX need to find a way to determine a better errcode here */
2370 ereport(ERROR,
2371 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2372 errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV)))));
2373 }
2374
2375 retval = newSVsv(POPs);
2376 (void) retval; /* silence compiler warning */
2377
2378 PUTBACK;
2379 FREETMPS;
2380 LEAVE;
2381 }
2382
2383 static Datum
2384 plperl_func_handler(PG_FUNCTION_ARGS)
2385 {
2386 bool nonatomic;
2387 plperl_proc_desc *prodesc;
2388 SV *perlret;
2389 Datum retval = 0;
2390 ReturnSetInfo *rsi;
2391 ErrorContextCallback pl_error_context;
2392
2393 nonatomic = fcinfo->context &&
2394 IsA(fcinfo->context, CallContext) &&
2395 !castNode(CallContext, fcinfo->context)->atomic;
2396
2397 if (SPI_connect_ext(nonatomic ? SPI_OPT_NONATOMIC : 0) != SPI_OK_CONNECT)
2398 elog(ERROR, "could not connect to SPI manager");
2399
2400 prodesc = compile_plperl_function(fcinfo->flinfo->fn_oid, false, false);
2401 current_call_data->prodesc = prodesc;
2402 increment_prodesc_refcount(prodesc);
2403
2404 /* Set a callback for error reporting */
2405 pl_error_context.callback = plperl_exec_callback;
2406 pl_error_context.previous = error_context_stack;
2407 pl_error_context.arg = prodesc->proname;
2408 error_context_stack = &pl_error_context;
2409
2410 rsi = (ReturnSetInfo *) fcinfo->resultinfo;
2411
2412 if (prodesc->fn_retisset)
2413 {
2414 /* Check context before allowing the call to go through */
2415 if (!rsi || !IsA(rsi, ReturnSetInfo) ||
2416 (rsi->allowedModes & SFRM_Materialize) == 0)
2417 ereport(ERROR,
2418 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2419 errmsg("set-valued function called in context that "
2420 "cannot accept a set")));
2421 }
2422
2423 activate_interpreter(prodesc->interp);
2424
2425 perlret = plperl_call_perl_func(prodesc, fcinfo);
2426
2427 /************************************************************
2428 * Disconnect from SPI manager and then create the return
2429 * values datum (if the input function does a palloc for it
2430 * this must not be allocated in the SPI memory context
2431 * because SPI_finish would free it).
2432 ************************************************************/
2433 if (SPI_finish() != SPI_OK_FINISH)
2434 elog(ERROR, "SPI_finish() failed");
2435
2436 if (prodesc->fn_retisset)
2437 {
2438 SV *sav;
2439
2440 /*
2441 * If the Perl function returned an arrayref, we pretend that it
2442 * called return_next() for each element of the array, to handle old
2443 * SRFs that didn't know about return_next(). Any other sort of return
2444 * value is an error, except undef which means return an empty set.
2445 */
2446 sav = get_perl_array_ref(perlret);
2447 if (sav)
2448 {
2449 dTHX;
2450 int i = 0;
2451 SV **svp = 0;
2452 AV *rav = (AV *) SvRV(sav);
2453
2454 while ((svp = av_fetch(rav, i, FALSE)) != NULL)
2455 {
2456 plperl_return_next_internal(*svp);
2457 i++;
2458 }
2459 }
2460 else if (SvOK(perlret))
2461 {
2462 ereport(ERROR,
2463 (errcode(ERRCODE_DATATYPE_MISMATCH),
2464 errmsg("set-returning PL/Perl function must return "
2465 "reference to array or use return_next")));
2466 }
2467
2468 rsi->returnMode = SFRM_Materialize;
2469 if (current_call_data->tuple_store)
2470 {
2471 rsi->setResult = current_call_data->tuple_store;
2472 rsi->setDesc = current_call_data->ret_tdesc;
2473 }
2474 retval = (Datum) 0;
2475 }
2476 else if (prodesc->result_oid)
2477 {
2478 retval = plperl_sv_to_datum(perlret,
2479 prodesc->result_oid,
2480 -1,
2481 fcinfo,
2482 &prodesc->result_in_func,
2483 prodesc->result_typioparam,
2484 &fcinfo->isnull);
2485
2486 if (fcinfo->isnull && rsi && IsA(rsi, ReturnSetInfo))
2487 rsi->isDone = ExprEndResult;
2488 }
2489
2490 /* Restore the previous error callback */
2491 error_context_stack = pl_error_context.previous;
2492
2493 SvREFCNT_dec_current(perlret);
2494
2495 return retval;
2496 }
2497
2498
2499 static Datum
2500 plperl_trigger_handler(PG_FUNCTION_ARGS)
2501 {
2502 plperl_proc_desc *prodesc;
2503 SV *perlret;
2504 Datum retval;
2505 SV *svTD;
2506 HV *hvTD;
2507 ErrorContextCallback pl_error_context;
2508 TriggerData *tdata;
2509 int rc PG_USED_FOR_ASSERTS_ONLY;
2510
2511 /* Connect to SPI manager */
2512 if (SPI_connect() != SPI_OK_CONNECT)
2513 elog(ERROR, "could not connect to SPI manager");
2514
2515 /* Make transition tables visible to this SPI connection */
2516 tdata = (TriggerData *) fcinfo->context;
2517 rc = SPI_register_trigger_data(tdata);
2518 Assert(rc >= 0);
2519
2520 /* Find or compile the function */
2521 prodesc = compile_plperl_function(fcinfo->flinfo->fn_oid, true, false);
2522 current_call_data->prodesc = prodesc;
2523 increment_prodesc_refcount(prodesc);
2524
2525 /* Set a callback for error reporting */
2526 pl_error_context.callback = plperl_exec_callback;
2527 pl_error_context.previous = error_context_stack;
2528 pl_error_context.arg = prodesc->proname;
2529 error_context_stack = &pl_error_context;
2530
2531 activate_interpreter(prodesc->interp);
2532
2533 svTD = plperl_trigger_build_args(fcinfo);
2534 perlret = plperl_call_perl_trigger_func(prodesc, fcinfo, svTD);
2535 hvTD = (HV *) SvRV(svTD);
2536
2537 /************************************************************
2538 * Disconnect from SPI manager and then create the return
2539 * values datum (if the input function does a palloc for it
2540 * this must not be allocated in the SPI memory context
2541 * because SPI_finish would free it).
2542 ************************************************************/
2543 if (SPI_finish() != SPI_OK_FINISH)
2544 elog(ERROR, "SPI_finish() failed");
2545
2546 if (perlret == NULL || !SvOK(perlret))
2547 {
2548 /* undef result means go ahead with original tuple */
2549 TriggerData *trigdata = ((TriggerData *) fcinfo->context);
2550
2551 if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
2552 retval = (Datum) trigdata->tg_trigtuple;
2553 else if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
2554 retval = (Datum) trigdata->tg_newtuple;
2555 else if (TRIGGER_FIRED_BY_DELETE(trigdata->tg_event))
2556 retval = (Datum) trigdata->tg_trigtuple;
2557 else if (TRIGGER_FIRED_BY_TRUNCATE(trigdata->tg_event))
2558 retval = (Datum) trigdata->tg_trigtuple;
2559 else
2560 retval = (Datum) 0; /* can this happen? */
2561 }
2562 else
2563 {
2564 HeapTuple trv;
2565 char *tmp;
2566
2567 tmp = sv2cstr(perlret);
2568
2569 if (pg_strcasecmp(tmp, "SKIP") == 0)
2570 trv = NULL;
2571 else if (pg_strcasecmp(tmp, "MODIFY") == 0)
2572 {
2573 TriggerData *trigdata = (TriggerData *) fcinfo->context;
2574
2575 if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
2576 trv = plperl_modify_tuple(hvTD, trigdata,
2577 trigdata->tg_trigtuple);
2578 else if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
2579 trv = plperl_modify_tuple(hvTD, trigdata,
2580 trigdata->tg_newtuple);
2581 else
2582 {
2583 ereport(WARNING,
2584 (errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
2585 errmsg("ignoring modified row in DELETE trigger")));
2586 trv = NULL;
2587 }
2588 }
2589 else
2590 {
2591 ereport(ERROR,
2592 (errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
2593 errmsg("result of PL/Perl trigger function must be undef, "
2594 "\"SKIP\", or \"MODIFY\"")));
2595 trv = NULL;
2596 }
2597 retval = PointerGetDatum(trv);
2598 pfree(tmp);
2599 }
2600
2601 /* Restore the previous error callback */
2602 error_context_stack = pl_error_context.previous;
2603
2604 SvREFCNT_dec_current(svTD);
2605 if (perlret)
2606 SvREFCNT_dec_current(perlret);
2607
2608 return retval;
2609 }
2610
2611
2612 static void
2613 plperl_event_trigger_handler(PG_FUNCTION_ARGS)
2614 {
2615 plperl_proc_desc *prodesc;
2616 SV *svTD;
2617 ErrorContextCallback pl_error_context;
2618
2619 /* Connect to SPI manager */
2620 if (SPI_connect() != SPI_OK_CONNECT)
2621 elog(ERROR, "could not connect to SPI manager");
2622
2623 /* Find or compile the function */
2624 prodesc = compile_plperl_function(fcinfo->flinfo->fn_oid, false, true);
2625 current_call_data->prodesc = prodesc;
2626 increment_prodesc_refcount(prodesc);
2627
2628 /* Set a callback for error reporting */
2629 pl_error_context.callback = plperl_exec_callback;
2630 pl_error_context.previous = error_context_stack;
2631 pl_error_context.arg = prodesc->proname;
2632 error_context_stack = &pl_error_context;
2633
2634 activate_interpreter(prodesc->interp);
2635
2636 svTD = plperl_event_trigger_build_args(fcinfo);
2637 plperl_call_perl_event_trigger_func(prodesc, fcinfo, svTD);
2638
2639 if (SPI_finish() != SPI_OK_FINISH)
2640 elog(ERROR, "SPI_finish() failed");
2641
2642 /* Restore the previous error callback */
2643 error_context_stack = pl_error_context.previous;
2644
2645 SvREFCNT_dec_current(svTD);
2646 }
2647
2648
2649 static bool
2650 validate_plperl_function(plperl_proc_ptr *proc_ptr, HeapTuple procTup)
2651 {
2652 if (proc_ptr && proc_ptr->proc_ptr)
2653 {
2654 plperl_proc_desc *prodesc = proc_ptr->proc_ptr;
2655 bool uptodate;
2656
2657 /************************************************************
2658 * If it's present, must check whether it's still up to date.
2659 * This is needed because CREATE OR REPLACE FUNCTION can modify the
2660 * function's pg_proc entry without changing its OID.
2661 ************************************************************/
2662 uptodate = (prodesc->fn_xmin == HeapTupleHeaderGetRawXmin(procTup->t_data) &&
2663 ItemPointerEquals(&prodesc->fn_tid, &procTup->t_self));
2664
2665 if (uptodate)
2666 return true;
2667
2668 /* Otherwise, unlink the obsoleted entry from the hashtable ... */
2669 proc_ptr->proc_ptr = NULL;
2670 /* ... and release the corresponding refcount, probably deleting it */
2671 decrement_prodesc_refcount(prodesc);
2672 }
2673
2674 return false;
2675 }
2676
2677
2678 static void
2679 free_plperl_function(plperl_proc_desc *prodesc)
2680 {
2681 Assert(prodesc->fn_refcount == 0);
2682 /* Release CODE reference, if we have one, from the appropriate interp */
2683 if (prodesc->reference)
2684 {
2685 plperl_interp_desc *oldinterp = plperl_active_interp;
2686
2687 activate_interpreter(prodesc->interp);
2688 SvREFCNT_dec_current(prodesc->reference);
2689 activate_interpreter(oldinterp);
2690 }
2691 /* Release all PG-owned data for this proc */
2692 MemoryContextDelete(prodesc->fn_cxt);
2693 }
2694
2695
2696 static plperl_proc_desc *
2697 compile_plperl_function(Oid fn_oid, bool is_trigger, bool is_event_trigger)
2698 {
2699 HeapTuple procTup;
2700 Form_pg_proc procStruct;
2701 plperl_proc_key proc_key;
2702 plperl_proc_ptr *proc_ptr;
2703 plperl_proc_desc *volatile prodesc = NULL;
2704 volatile MemoryContext proc_cxt = NULL;
2705 plperl_interp_desc *oldinterp = plperl_active_interp;
2706 ErrorContextCallback plperl_error_context;
2707
2708 /* We'll need the pg_proc tuple in any case... */
2709 procTup = SearchSysCache1(PROCOID, ObjectIdGetDatum(fn_oid));
2710 if (!HeapTupleIsValid(procTup))
2711 elog(ERROR, "cache lookup failed for function %u", fn_oid);
2712 procStruct = (Form_pg_proc) GETSTRUCT(procTup);
2713
2714 /*
2715 * Try to find function in plperl_proc_hash. The reason for this
2716 * overcomplicated-seeming lookup procedure is that we don't know whether
2717 * it's plperl or plperlu, and don't want to spend a lookup in pg_language
2718 * to find out.
2719 */
2720 proc_key.proc_id = fn_oid;
2721 proc_key.is_trigger = is_trigger;
2722 proc_key.user_id = GetUserId();
2723 proc_ptr = hash_search(plperl_proc_hash, &proc_key,
2724 HASH_FIND, NULL);
2725 if (validate_plperl_function(proc_ptr, procTup))
2726 {
2727 /* Found valid plperl entry */
2728 ReleaseSysCache(procTup);
2729 return proc_ptr->proc_ptr;
2730 }
2731
2732 /* If not found or obsolete, maybe it's plperlu */
2733 proc_key.user_id = InvalidOid;
2734 proc_ptr = hash_search(plperl_proc_hash, &proc_key,
2735 HASH_FIND, NULL);
2736 if (validate_plperl_function(proc_ptr, procTup))
2737 {
2738 /* Found valid plperlu entry */
2739 ReleaseSysCache(procTup);
2740 return proc_ptr->proc_ptr;
2741 }
2742
2743 /************************************************************
2744 * If we haven't found it in the hashtable, we analyze
2745 * the function's arguments and return type and store
2746 * the in-/out-functions in the prodesc block,
2747 * then we load the procedure into the Perl interpreter,
2748 * and last we create a new hashtable entry for it.
2749 ************************************************************/
2750
2751 /* Set a callback for reporting compilation errors */
2752 plperl_error_context.callback = plperl_compile_callback;
2753 plperl_error_context.previous = error_context_stack;
2754 plperl_error_context.arg = NameStr(procStruct->proname);
2755 error_context_stack = &plperl_error_context;
2756
2757 PG_TRY();
2758 {
2759 HeapTuple langTup;
2760 HeapTuple typeTup;
2761 Form_pg_language langStruct;
2762 Form_pg_type typeStruct;
2763 Datum protrftypes_datum;
2764 Datum prosrcdatum;
2765 bool isnull;
2766 char *proc_source;
2767 MemoryContext oldcontext;
2768
2769 /************************************************************
2770 * Allocate a context that will hold all PG data for the procedure.
2771 ************************************************************/
2772 proc_cxt = AllocSetContextCreate(TopMemoryContext,
2773 "PL/Perl function",
2774 ALLOCSET_SMALL_SIZES);
2775
2776 /************************************************************
2777 * Allocate and fill a new procedure description block.
2778 * struct prodesc and subsidiary data must all live in proc_cxt.
2779 ************************************************************/
2780 oldcontext = MemoryContextSwitchTo(proc_cxt);
2781 prodesc = (plperl_proc_desc *) palloc0(sizeof(plperl_proc_desc));
2782 prodesc->proname = pstrdup(NameStr(procStruct->proname));
2783 MemoryContextSetIdentifier(proc_cxt, prodesc->proname);
2784 prodesc->fn_cxt = proc_cxt;
2785 prodesc->fn_refcount = 0;
2786 prodesc->fn_xmin = HeapTupleHeaderGetRawXmin(procTup->t_data);
2787 prodesc->fn_tid = procTup->t_self;
2788 prodesc->nargs = procStruct->pronargs;
2789 prodesc->arg_out_func = (FmgrInfo *) palloc0(prodesc->nargs * sizeof(FmgrInfo));
2790 prodesc->arg_is_rowtype = (bool *) palloc0(prodesc->nargs * sizeof(bool));
2791 prodesc->arg_arraytype = (Oid *) palloc0(prodesc->nargs * sizeof(Oid));
2792 MemoryContextSwitchTo(oldcontext);
2793
2794 /* Remember if function is STABLE/IMMUTABLE */
2795 prodesc->fn_readonly =
2796 (procStruct->provolatile != PROVOLATILE_VOLATILE);
2797
2798 /* Fetch protrftypes */
2799 protrftypes_datum = SysCacheGetAttr(PROCOID, procTup,
2800 Anum_pg_proc_protrftypes, &isnull);
2801 MemoryContextSwitchTo(proc_cxt);
2802 prodesc->trftypes = isnull ? NIL : oid_array_to_list(protrftypes_datum);
2803 MemoryContextSwitchTo(oldcontext);
2804
2805 /************************************************************
2806 * Lookup the pg_language tuple by Oid
2807 ************************************************************/
2808 langTup = SearchSysCache1(LANGOID,
2809 ObjectIdGetDatum(procStruct->prolang));
2810 if (!HeapTupleIsValid(langTup))
2811 elog(ERROR, "cache lookup failed for language %u",
2812 procStruct->prolang);
2813 langStruct = (Form_pg_language) GETSTRUCT(langTup);
2814 prodesc->lang_oid = langStruct->oid;
2815 prodesc->lanpltrusted = langStruct->lanpltrusted;
2816 ReleaseSysCache(langTup);
2817
2818 /************************************************************
2819 * Get the required information for input conversion of the
2820 * return value.
2821 ************************************************************/
2822 if (!is_trigger && !is_event_trigger)
2823 {
2824 Oid rettype = procStruct->prorettype;
2825
2826 typeTup = SearchSysCache1(TYPEOID, ObjectIdGetDatum(rettype));
2827 if (!HeapTupleIsValid(typeTup))
2828 elog(ERROR, "cache lookup failed for type %u", rettype);
2829 typeStruct = (Form_pg_type) GETSTRUCT(typeTup);
2830
2831 /* Disallow pseudotype result, except VOID or RECORD */
2832 if (typeStruct->typtype == TYPTYPE_PSEUDO)
2833 {
2834 if (rettype == VOIDOID ||
2835 rettype == RECORDOID)
2836 /* okay */ ;
2837 else if (rettype == TRIGGEROID ||
2838 rettype == EVENT_TRIGGEROID)
2839 ereport(ERROR,
2840 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2841 errmsg("trigger functions can only be called "
2842 "as triggers")));
2843 else
2844 ereport(ERROR,
2845 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2846 errmsg("PL/Perl functions cannot return type %s",
2847 format_type_be(rettype))));
2848 }
2849
2850 prodesc->result_oid = rettype;
2851 prodesc->fn_retisset = procStruct->proretset;
2852 prodesc->fn_retistuple = type_is_rowtype(rettype);
2853 prodesc->fn_retisarray = IsTrueArrayType(typeStruct);
2854
2855 fmgr_info_cxt(typeStruct->typinput,
2856 &(prodesc->result_in_func),
2857 proc_cxt);
2858 prodesc->result_typioparam = getTypeIOParam(typeTup);
2859
2860 ReleaseSysCache(typeTup);
2861 }
2862
2863 /************************************************************
2864 * Get the required information for output conversion
2865 * of all procedure arguments
2866 ************************************************************/
2867 if (!is_trigger && !is_event_trigger)
2868 {
2869 int i;
2870
2871 for (i = 0; i < prodesc->nargs; i++)
2872 {
2873 Oid argtype = procStruct->proargtypes.values[i];
2874
2875 typeTup = SearchSysCache1(TYPEOID, ObjectIdGetDatum(argtype));
2876 if (!HeapTupleIsValid(typeTup))
2877 elog(ERROR, "cache lookup failed for type %u", argtype);
2878 typeStruct = (Form_pg_type) GETSTRUCT(typeTup);
2879
2880 /* Disallow pseudotype argument, except RECORD */
2881 if (typeStruct->typtype == TYPTYPE_PSEUDO &&
2882 argtype != RECORDOID)
2883 ereport(ERROR,
2884 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2885 errmsg("PL/Perl functions cannot accept type %s",
2886 format_type_be(argtype))));
2887
2888 if (type_is_rowtype(argtype))
2889 prodesc->arg_is_rowtype[i] = true;
2890 else
2891 {
2892 prodesc->arg_is_rowtype[i] = false;
2893 fmgr_info_cxt(typeStruct->typoutput,
2894 &(prodesc->arg_out_func[i]),
2895 proc_cxt);
2896 }
2897
2898 /* Identify array-type arguments */
2899 if (IsTrueArrayType(typeStruct))
2900 prodesc->arg_arraytype[i] = argtype;
2901 else
2902 prodesc->arg_arraytype[i] = InvalidOid;
2903
2904 ReleaseSysCache(typeTup);
2905 }
2906 }
2907
2908 /************************************************************
2909 * create the text of the anonymous subroutine.
2910 * we do not use a named subroutine so that we can call directly
2911 * through the reference.
2912 ************************************************************/
2913 prosrcdatum = SysCacheGetAttr(PROCOID, procTup,
2914 Anum_pg_proc_prosrc, &isnull);
2915 if (isnull)
2916 elog(ERROR, "null prosrc");
2917 proc_source = TextDatumGetCString(prosrcdatum);
2918
2919 /************************************************************
2920 * Create the procedure in the appropriate interpreter
2921 ************************************************************/
2922
2923 select_perl_context(prodesc->lanpltrusted);
2924
2925 prodesc->interp = plperl_active_interp;
2926
2927 plperl_create_sub(prodesc, proc_source, fn_oid);
2928
2929 activate_interpreter(oldinterp);
2930
2931 pfree(proc_source);
2932
2933 if (!prodesc->reference) /* can this happen? */
2934 elog(ERROR, "could not create PL/Perl internal procedure");
2935
2936 /************************************************************
2937 * OK, link the procedure into the correct hashtable entry.
2938 * Note we assume that the hashtable entry either doesn't exist yet,
2939 * or we already cleared its proc_ptr during the validation attempts
2940 * above. So no need to decrement an old refcount here.
2941 ************************************************************/
2942 proc_key.user_id = prodesc->lanpltrusted ? GetUserId() : InvalidOid;
2943
2944 proc_ptr = hash_search(plperl_proc_hash, &proc_key,
2945 HASH_ENTER, NULL);
2946 /* We assume these two steps can't throw an error: */
2947 proc_ptr->proc_ptr = prodesc;
2948 increment_prodesc_refcount(prodesc);
2949 }
2950 PG_CATCH();
2951 {
2952 /*
2953 * If we got as far as creating a reference, we should be able to use
2954 * free_plperl_function() to clean up. If not, then at most we have
2955 * some PG memory resources in proc_cxt, which we can just delete.
2956 */
2957 if (prodesc && prodesc->reference)
2958 free_plperl_function(prodesc);
2959 else if (proc_cxt)
2960 MemoryContextDelete(proc_cxt);
2961
2962 /* Be sure to restore the previous interpreter, too, for luck */
2963 activate_interpreter(oldinterp);
2964
2965 PG_RE_THROW();
2966 }
2967 PG_END_TRY();
2968
2969 /* restore previous error callback */
2970 error_context_stack = plperl_error_context.previous;
2971
2972 ReleaseSysCache(procTup);
2973
2974 return prodesc;
2975 }
2976
2977 /* Build a hash from a given composite/row datum */
2978 static SV *
2979 plperl_hash_from_datum(Datum attr)
2980 {
2981 HeapTupleHeader td;
2982 Oid tupType;
2983 int32 tupTypmod;
2984 TupleDesc tupdesc;
2985 HeapTupleData tmptup;
2986 SV *sv;
2987
2988 td = DatumGetHeapTupleHeader(attr);
2989
2990 /* Extract rowtype info and find a tupdesc */
2991 tupType = HeapTupleHeaderGetTypeId(td);
2992 tupTypmod = HeapTupleHeaderGetTypMod(td);
2993 tupdesc = lookup_rowtype_tupdesc(tupType, tupTypmod);
2994
2995 /* Build a temporary HeapTuple control structure */
2996 tmptup.t_len = HeapTupleHeaderGetDatumLength(td);
2997 tmptup.t_data = td;
2998
2999 sv = plperl_hash_from_tuple(&tmptup, tupdesc, true);
3000 ReleaseTupleDesc(tupdesc);
3001
3002 return sv;
3003 }
3004
3005 /* Build a hash from all attributes of a given tuple. */
3006 static SV *
3007 plperl_hash_from_tuple(HeapTuple tuple, TupleDesc tupdesc, bool include_generated)
3008 {
3009 dTHX;
3010 HV *hv;
3011 int i;
3012
3013 /* since this function recurses, it could be driven to stack overflow */
3014 check_stack_depth();
3015
3016 hv = newHV();
3017 hv_ksplit(hv, tupdesc->natts); /* pre-grow the hash */
3018
3019 for (i = 0; i < tupdesc->natts; i++)
3020 {
3021 Datum attr;
3022 bool isnull,
3023 typisvarlena;
3024 char *attname;
3025 Oid typoutput;
3026 Form_pg_attribute att = TupleDescAttr(tupdesc, i);
3027
3028 if (att->attisdropped)
3029 continue;
3030
3031 if (att->attgenerated)
3032 {
3033 /* don't include unless requested */
3034 if (!include_generated)
3035 continue;
3036 }
3037
3038 attname = NameStr(att->attname);
3039 attr = heap_getattr(tuple, i + 1, tupdesc, &isnull);
3040
3041 if (isnull)
3042 {
3043 /*
3044 * Store (attname => undef) and move on. Note we can't use
3045 * &PL_sv_undef here; see "AVs, HVs and undefined values" in
3046 * perlguts for an explanation.
3047 */
3048 hv_store_string(hv, attname, newSV(0));
3049 continue;
3050 }
3051
3052 if (type_is_rowtype(att->atttypid))
3053 {
3054 SV *sv = plperl_hash_from_datum(attr);
3055
3056 hv_store_string(hv, attname, sv);
3057 }
3058 else
3059 {
3060 SV *sv;
3061 Oid funcid;
3062
3063 if (OidIsValid(get_base_element_type(att->atttypid)))
3064 sv = plperl_ref_from_pg_array(attr, att->atttypid);
3065 else if ((funcid = get_transform_fromsql(att->atttypid, current_call_data->prodesc->lang_oid, current_call_data->prodesc->trftypes)))
3066 sv = (SV *) DatumGetPointer(OidFunctionCall1(funcid, attr));
3067 else
3068 {
3069 char *outputstr;
3070
3071 /* XXX should have a way to cache these lookups */
3072 getTypeOutputInfo(att->atttypid, &typoutput, &typisvarlena);
3073
3074 outputstr = OidOutputFunctionCall(typoutput, attr);
3075 sv = cstr2sv(outputstr);
3076 pfree(outputstr);
3077 }
3078
3079 hv_store_string(hv, attname, sv);
3080 }
3081 }
3082 return newRV_noinc((SV *) hv);
3083 }
3084
3085
3086 static void
3087 check_spi_usage_allowed(void)
3088 {
3089 /* see comment in plperl_fini() */
3090 if (plperl_ending)
3091 {
3092 /* simple croak as we don't want to involve PostgreSQL code */
3093 croak("SPI functions can not be used in END blocks");
3094 }
3095 }
3096
3097
3098 HV *
3099 plperl_spi_exec(char *query, int limit)
3100 {
3101 HV *ret_hv;
3102
3103 /*
3104 * Execute the query inside a sub-transaction, so we can cope with errors
3105 * sanely
3106 */
3107 MemoryContext oldcontext = CurrentMemoryContext;
3108 ResourceOwner oldowner = CurrentResourceOwner;
3109
3110 check_spi_usage_allowed();
3111
3112 BeginInternalSubTransaction(NULL);
3113 /* Want to run inside function's memory context */
3114 MemoryContextSwitchTo(oldcontext);
3115
3116 PG_TRY();
3117 {
3118 int spi_rv;
3119
3120 pg_verifymbstr(query, strlen(query), false);
3121
3122 spi_rv = SPI_execute(query, current_call_data->prodesc->fn_readonly,
3123 limit);
3124 ret_hv = plperl_spi_execute_fetch_result(SPI_tuptable, SPI_processed,
3125 spi_rv);
3126
3127 /* Commit the inner transaction, return to outer xact context */
3128 ReleaseCurrentSubTransaction();
3129 MemoryContextSwitchTo(oldcontext);
3130 CurrentResourceOwner = oldowner;
3131 }
3132 PG_CATCH();
3133 {
3134 ErrorData *edata;
3135
3136 /* Save error info */
3137 MemoryContextSwitchTo(oldcontext);
3138 edata = CopyErrorData();
3139 FlushErrorState();
3140
3141 /* Abort the inner transaction */
3142 RollbackAndReleaseCurrentSubTransaction();
3143 MemoryContextSwitchTo(oldcontext);
3144 CurrentResourceOwner = oldowner;
3145
3146 /* Punt the error to Perl */
3147 croak_cstr(edata->message);
3148
3149 /* Can't get here, but keep compiler quiet */
3150 return NULL;
3151 }
3152 PG_END_TRY();
3153
3154 return ret_hv;
3155 }
3156
3157
3158 static HV *
3159 plperl_spi_execute_fetch_result(SPITupleTable *tuptable, uint64 processed,
3160 int status)
3161 {
3162 dTHX;
3163 HV *result;
3164
3165 check_spi_usage_allowed();
3166
3167 result = newHV();
3168
3169 hv_store_string(result, "status",
3170 cstr2sv(SPI_result_code_string(status)));
3171 hv_store_string(result, "processed",
3172 (processed > (uint64) UV_MAX) ?
3173 newSVnv((NV) processed) :
3174 newSVuv((UV) processed));
3175
3176 if (status > 0 && tuptable)
3177 {
3178 AV *rows;
3179 SV *row;
3180 uint64 i;
3181
3182 /* Prevent overflow in call to av_extend() */
3183 if (processed > (uint64) AV_SIZE_MAX)
3184 ereport(ERROR,
3185 (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
3186 errmsg("query result has too many rows to fit in a Perl array")));
3187
3188 rows = newAV();
3189 av_extend(rows, processed);
3190 for (i = 0; i < processed; i++)
3191 {
3192 row = plperl_hash_from_tuple(tuptable->vals[i], tuptable->tupdesc, true);
3193 av_push(rows, row);
3194 }
3195 hv_store_string(result, "rows",
3196 newRV_noinc((SV *) rows));
3197 }
3198
3199 SPI_freetuptable(tuptable);
3200
3201 return result;
3202 }
3203
3204
3205 /*
3206 * plperl_return_next catches any error and converts it to a Perl error.
3207 * We assume (perhaps without adequate justification) that we need not abort
3208 * the current transaction if the Perl code traps the error.
3209 */
3210 void
3211 plperl_return_next(SV *sv)
3212 {
3213 MemoryContext oldcontext = CurrentMemoryContext;
3214
3215 PG_TRY();
3216 {
3217 plperl_return_next_internal(sv);
3218 }
3219 PG_CATCH();
3220 {
3221 ErrorData *edata;
3222
3223 /* Must reset elog.c's state */
3224 MemoryContextSwitchTo(oldcontext);
3225 edata = CopyErrorData();
3226 FlushErrorState();
3227
3228 /* Punt the error to Perl */
3229 croak_cstr(edata->message);
3230 }
3231 PG_END_TRY();
3232 }
3233
3234 /*
3235 * plperl_return_next_internal reports any errors in Postgres fashion
3236 * (via ereport).
3237 */
3238 static void
3239 plperl_return_next_internal(SV *sv)
3240 {
3241 plperl_proc_desc *prodesc;
3242 FunctionCallInfo fcinfo;
3243 ReturnSetInfo *rsi;
3244 MemoryContext old_cxt;
3245
3246 if (!sv)
3247 return;
3248
3249 prodesc = current_call_data->prodesc;
3250 fcinfo = current_call_data->fcinfo;
3251 rsi = (ReturnSetInfo *) fcinfo->resultinfo;
3252
3253 if (!prodesc->fn_retisset)
3254 ereport(ERROR,
3255 (errcode(ERRCODE_SYNTAX_ERROR),
3256 errmsg("cannot use return_next in a non-SETOF function")));
3257
3258 if (!current_call_data->ret_tdesc)
3259 {
3260 TupleDesc tupdesc;
3261
3262 Assert(!current_call_data->tuple_store);
3263
3264 /*
3265 * This is the first call to return_next in the current PL/Perl
3266 * function call, so identify the output tuple type and create a
3267 * tuplestore to hold the result rows.
3268 */
3269 if (prodesc->fn_retistuple)
3270 {
3271 TypeFuncClass funcclass;
3272 Oid typid;
3273
3274 funcclass = get_call_result_type(fcinfo, &typid, &tupdesc);
3275 if (funcclass != TYPEFUNC_COMPOSITE &&
3276 funcclass != TYPEFUNC_COMPOSITE_DOMAIN)
3277 ereport(ERROR,
3278 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
3279 errmsg("function returning record called in context "
3280 "that cannot accept type record")));
3281 /* if domain-over-composite, remember the domain's type OID */
3282 if (funcclass == TYPEFUNC_COMPOSITE_DOMAIN)
3283 current_call_data->cdomain_oid = typid;
3284 }
3285 else
3286 {
3287 tupdesc = rsi->expectedDesc;
3288 /* Protect assumption below that we return exactly one column */
3289 if (tupdesc == NULL || tupdesc->natts != 1)
3290 elog(ERROR, "expected single-column result descriptor for non-composite SETOF result");
3291 }
3292
3293 /*
3294 * Make sure the tuple_store and ret_tdesc are sufficiently
3295 * long-lived.
3296 */
3297 old_cxt = MemoryContextSwitchTo(rsi->econtext->ecxt_per_query_memory);
3298
3299 current_call_data->ret_tdesc = CreateTupleDescCopy(tupdesc);
3300 current_call_data->tuple_store =
3301 tuplestore_begin_heap(rsi->allowedModes & SFRM_Materialize_Random,
3302 false, work_mem);
3303
3304 MemoryContextSwitchTo(old_cxt);
3305 }
3306
3307 /*
3308 * Producing the tuple we want to return requires making plenty of
3309 * palloc() allocations that are not cleaned up. Since this function can
3310 * be called many times before the current memory context is reset, we
3311 * need to do those allocations in a temporary context.
3312 */
3313 if (!current_call_data->tmp_cxt)
3314 {
3315 current_call_data->tmp_cxt =
3316 AllocSetContextCreate(CurrentMemoryContext,
3317 "PL/Perl return_next temporary cxt",
3318 ALLOCSET_DEFAULT_SIZES);
3319 }
3320
3321 old_cxt = MemoryContextSwitchTo(current_call_data->tmp_cxt);
3322
3323 if (prodesc->fn_retistuple)
3324 {
3325 HeapTuple tuple;
3326
3327 if (!(SvOK(sv) && SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVHV))
3328 ereport(ERROR,
3329 (errcode(ERRCODE_DATATYPE_MISMATCH),
3330 errmsg("SETOF-composite-returning PL/Perl function "
3331 "must call return_next with reference to hash")));
3332
3333 tuple = plperl_build_tuple_result((HV *) SvRV(sv),
3334 current_call_data->ret_tdesc);
3335
3336 if (OidIsValid(current_call_data->cdomain_oid))
3337 domain_check(HeapTupleGetDatum(tuple), false,
3338 current_call_data->cdomain_oid,
3339 &current_call_data->cdomain_info,
3340 rsi->econtext->ecxt_per_query_memory);
3341
3342 tuplestore_puttuple(current_call_data->tuple_store, tuple);
3343 }
3344 else if (prodesc->result_oid)
3345 {
3346 Datum ret[1];
3347 bool isNull[1];
3348
3349 ret[0] = plperl_sv_to_datum(sv,
3350 prodesc->result_oid,
3351 -1,
3352 fcinfo,
3353 &prodesc->result_in_func,
3354 prodesc->result_typioparam,
3355 &isNull[0]);
3356
3357 tuplestore_putvalues(current_call_data->tuple_store,
3358 current_call_data->ret_tdesc,
3359 ret, isNull);
3360 }
3361
3362 MemoryContextSwitchTo(old_cxt);
3363 MemoryContextReset(current_call_data->tmp_cxt);
3364 }
3365
3366
3367 SV *
3368 plperl_spi_query(char *query)
3369 {
3370 SV *cursor;
3371
3372 /*
3373 * Execute the query inside a sub-transaction, so we can cope with errors
3374 * sanely
3375 */
3376 MemoryContext oldcontext = CurrentMemoryContext;
3377 ResourceOwner oldowner = CurrentResourceOwner;
3378
3379 check_spi_usage_allowed();
3380
3381 BeginInternalSubTransaction(NULL);
3382 /* Want to run inside function's memory context */
3383 MemoryContextSwitchTo(oldcontext);
3384
3385 PG_TRY();
3386 {
3387 SPIPlanPtr plan;
3388 Portal portal;
3389
3390 /* Make sure the query is validly encoded */
3391 pg_verifymbstr(query, strlen(query), false);
3392
3393 /* Create a cursor for the query */
3394 plan = SPI_prepare(query, 0, NULL);
3395 if (plan == NULL)
3396 elog(ERROR, "SPI_prepare() failed:%s",
3397 SPI_result_code_string(SPI_result));
3398
3399 portal = SPI_cursor_open(NULL, plan, NULL, NULL, false);
3400 SPI_freeplan(plan);
3401 if (portal == NULL)
3402 elog(ERROR, "SPI_cursor_open() failed:%s",
3403 SPI_result_code_string(SPI_result));
3404 cursor = cstr2sv(portal->name);
3405
3406 PinPortal(portal);
3407
3408 /* Commit the inner transaction, return to outer xact context */
3409 ReleaseCurrentSubTransaction();
3410 MemoryContextSwitchTo(oldcontext);
3411 CurrentResourceOwner = oldowner;
3412 }
3413 PG_CATCH();
3414 {
3415 ErrorData *edata;
3416
3417 /* Save error info */
3418 MemoryContextSwitchTo(oldcontext);
3419 edata = CopyErrorData();
3420 FlushErrorState();
3421
3422 /* Abort the inner transaction */
3423 RollbackAndReleaseCurrentSubTransaction();
3424 MemoryContextSwitchTo(oldcontext);
3425 CurrentResourceOwner = oldowner;
3426
3427 /* Punt the error to Perl */
3428 croak_cstr(edata->message);
3429
3430 /* Can't get here, but keep compiler quiet */
3431 return NULL;
3432 }
3433 PG_END_TRY();
3434
3435 return cursor;
3436 }
3437
3438
3439 SV *
3440 plperl_spi_fetchrow(char *cursor)
3441 {
3442 SV *row;
3443
3444 /*
3445 * Execute the FETCH inside a sub-transaction, so we can cope with errors
3446 * sanely
3447 */
3448 MemoryContext oldcontext = CurrentMemoryContext;
3449 ResourceOwner oldowner = CurrentResourceOwner;
3450
3451 check_spi_usage_allowed();
3452
3453 BeginInternalSubTransaction(NULL);
3454 /* Want to run inside function's memory context */
3455 MemoryContextSwitchTo(oldcontext);
3456
3457 PG_TRY();
3458 {
3459 dTHX;
3460 Portal p = SPI_cursor_find(cursor);
3461
3462 if (!p)
3463 {
3464 row = &PL_sv_undef;
3465 }
3466 else
3467 {
3468 SPI_cursor_fetch(p, true, 1);
3469 if (SPI_processed == 0)
3470 {
3471 UnpinPortal(p);
3472 SPI_cursor_close(p);
3473 row = &PL_sv_undef;
3474 }
3475 else
3476 {
3477 row = plperl_hash_from_tuple(SPI_tuptable->vals[0],
3478 SPI_tuptable->tupdesc,
3479 true);
3480 }
3481 SPI_freetuptable(SPI_tuptable);
3482 }
3483
3484 /* Commit the inner transaction, return to outer xact context */
3485 ReleaseCurrentSubTransaction();
3486 MemoryContextSwitchTo(oldcontext);
3487 CurrentResourceOwner = oldowner;
3488 }
3489 PG_CATCH();
3490 {
3491 ErrorData *edata;
3492
3493 /* Save error info */
3494 MemoryContextSwitchTo(oldcontext);
3495 edata = CopyErrorData();
3496 FlushErrorState();
3497
3498 /* Abort the inner transaction */
3499 RollbackAndReleaseCurrentSubTransaction();
3500 MemoryContextSwitchTo(oldcontext);
3501 CurrentResourceOwner = oldowner;
3502
3503 /* Punt the error to Perl */
3504 croak_cstr(edata->message);
3505
3506 /* Can't get here, but keep compiler quiet */
3507 return NULL;
3508 }
3509 PG_END_TRY();
3510
3511 return row;
3512 }
3513
3514 void
3515 plperl_spi_cursor_close(char *cursor)
3516 {
3517 Portal p;
3518
3519 check_spi_usage_allowed();
3520
3521 p = SPI_cursor_find(cursor);
3522
3523 if (p)
3524 {
3525 UnpinPortal(p);
3526 SPI_cursor_close(p);
3527 }
3528 }
3529
3530 SV *
3531 plperl_spi_prepare(char *query, int argc, SV **argv)
3532 {
3533 volatile SPIPlanPtr plan = NULL;
3534 volatile MemoryContext plan_cxt = NULL;
3535 plperl_query_desc *volatile qdesc = NULL;
3536 plperl_query_entry *volatile hash_entry = NULL;
3537 MemoryContext oldcontext = CurrentMemoryContext;
3538 ResourceOwner oldowner = CurrentResourceOwner;
3539 MemoryContext work_cxt;
3540 bool found;
3541 int i;
3542
3543 check_spi_usage_allowed();
3544
3545 BeginInternalSubTransaction(NULL);
3546 MemoryContextSwitchTo(oldcontext);
3547
3548 PG_TRY();
3549 {
3550 CHECK_FOR_INTERRUPTS();
3551
3552 /************************************************************
3553 * Allocate the new querydesc structure
3554 *
3555 * The qdesc struct, as well as all its subsidiary data, lives in its
3556 * plan_cxt. But note that the SPIPlan does not.
3557 ************************************************************/
3558 plan_cxt = AllocSetContextCreate(TopMemoryContext,
3559 "PL/Perl spi_prepare query",
3560 ALLOCSET_SMALL_SIZES);
3561 MemoryContextSwitchTo(plan_cxt);
3562 qdesc = (plperl_query_desc *) palloc0(sizeof(plperl_query_desc));
3563 snprintf(qdesc->qname, sizeof(qdesc->qname), "%p", qdesc);
3564 qdesc->plan_cxt = plan_cxt;
3565 qdesc->nargs = argc;
3566 qdesc->argtypes = (Oid *) palloc(argc * sizeof(Oid));
3567 qdesc->arginfuncs = (FmgrInfo *) palloc(argc * sizeof(FmgrInfo));
3568 qdesc->argtypioparams = (Oid *) palloc(argc * sizeof(Oid));
3569 MemoryContextSwitchTo(oldcontext);
3570
3571 /************************************************************
3572 * Do the following work in a short-lived context so that we don't
3573 * leak a lot of memory in the PL/Perl function's SPI Proc context.
3574 ************************************************************/
3575 work_cxt = AllocSetContextCreate(CurrentMemoryContext,
3576 "PL/Perl spi_prepare workspace",
3577 ALLOCSET_DEFAULT_SIZES);
3578 MemoryContextSwitchTo(work_cxt);
3579
3580 /************************************************************
3581 * Resolve argument type names and then look them up by oid
3582 * in the system cache, and remember the required information
3583 * for input conversion.
3584 ************************************************************/
3585 for (i = 0; i < argc; i++)
3586 {
3587 Oid typId,
3588 typInput,
3589 typIOParam;
3590 int32 typmod;
3591 char *typstr;
3592
3593 typstr = sv2cstr(argv[i]);
3594 parseTypeString(typstr, &typId, &typmod, false);
3595 pfree(typstr);
3596
3597 getTypeInputInfo(typId, &typInput, &typIOParam);
3598
3599 qdesc->argtypes[i] = typId;
3600 fmgr_info_cxt(typInput, &(qdesc->arginfuncs[i]), plan_cxt);
3601 qdesc->argtypioparams[i] = typIOParam;
3602 }
3603
3604 /* Make sure the query is validly encoded */
3605 pg_verifymbstr(query, strlen(query), false);
3606
3607 /************************************************************
3608 * Prepare the plan and check for errors
3609 ************************************************************/
3610 plan = SPI_prepare(query, argc, qdesc->argtypes);
3611
3612 if (plan == NULL)
3613 elog(ERROR, "SPI_prepare() failed:%s",
3614 SPI_result_code_string(SPI_result));
3615
3616 /************************************************************
3617 * Save the plan into permanent memory (right now it's in the
3618 * SPI procCxt, which will go away at function end).
3619 ************************************************************/
3620 if (SPI_keepplan(plan))
3621 elog(ERROR, "SPI_keepplan() failed");
3622 qdesc->plan = plan;
3623
3624 /************************************************************
3625 * Insert a hashtable entry for the plan.
3626 ************************************************************/
3627 hash_entry = hash_search(plperl_active_interp->query_hash,
3628 qdesc->qname,
3629 HASH_ENTER, &found);
3630 hash_entry->query_data = qdesc;
3631
3632 /* Get rid of workspace */
3633 MemoryContextDelete(work_cxt);
3634
3635 /* Commit the inner transaction, return to outer xact context */
3636 ReleaseCurrentSubTransaction();
3637 MemoryContextSwitchTo(oldcontext);
3638 CurrentResourceOwner = oldowner;
3639 }
3640 PG_CATCH();
3641 {
3642 ErrorData *edata;
3643
3644 /* Save error info */
3645 MemoryContextSwitchTo(oldcontext);
3646 edata = CopyErrorData();
3647 FlushErrorState();
3648
3649 /* Drop anything we managed to allocate */
3650 if (hash_entry)
3651 hash_search(plperl_active_interp->query_hash,
3652 qdesc->qname,
3653 HASH_REMOVE, NULL);
3654 if (plan_cxt)
3655 MemoryContextDelete(plan_cxt);
3656 if (plan)
3657 SPI_freeplan(plan);
3658
3659 /* Abort the inner transaction */
3660 RollbackAndReleaseCurrentSubTransaction();
3661 MemoryContextSwitchTo(oldcontext);
3662 CurrentResourceOwner = oldowner;
3663
3664 /* Punt the error to Perl */
3665 croak_cstr(edata->message);
3666
3667 /* Can't get here, but keep compiler quiet */
3668 return NULL;
3669 }
3670 PG_END_TRY();
3671
3672 /************************************************************
3673 * Return the query's hash key to the caller.
3674 ************************************************************/
3675 return cstr2sv(qdesc->qname);
3676 }
3677
3678 HV *
3679 plperl_spi_exec_prepared(char *query, HV *attr, int argc, SV **argv)
3680 {
3681 HV *ret_hv;
3682 SV **sv;
3683 int i,
3684 limit,
3685 spi_rv;
3686 char *nulls;
3687 Datum *argvalues;
3688 plperl_query_desc *qdesc;
3689 plperl_query_entry *hash_entry;
3690
3691 /*
3692 * Execute the query inside a sub-transaction, so we can cope with errors
3693 * sanely
3694 */
3695 MemoryContext oldcontext = CurrentMemoryContext;
3696 ResourceOwner oldowner = CurrentResourceOwner;
3697
3698 check_spi_usage_allowed();
3699
3700 BeginInternalSubTransaction(NULL);
3701 /* Want to run inside function's memory context */
3702 MemoryContextSwitchTo(oldcontext);
3703
3704 PG_TRY();
3705 {
3706 dTHX;
3707
3708 /************************************************************
3709 * Fetch the saved plan descriptor, see if it's o.k.
3710 ************************************************************/
3711 hash_entry = hash_search(plperl_active_interp->query_hash, query,
3712 HASH_FIND, NULL);
3713 if (hash_entry == NULL)
3714 elog(ERROR, "spi_exec_prepared: Invalid prepared query passed");
3715
3716 qdesc = hash_entry->query_data;
3717 if (qdesc == NULL)
3718 elog(ERROR, "spi_exec_prepared: plperl query_hash value vanished");
3719
3720 if (qdesc->nargs != argc)
3721 elog(ERROR, "spi_exec_prepared: expected %d argument(s), %d passed",
3722 qdesc->nargs, argc);
3723
3724 /************************************************************
3725 * Parse eventual attributes
3726 ************************************************************/
3727 limit = 0;
3728 if (attr != NULL)
3729 {
3730 sv = hv_fetch_string(attr, "limit");
3731 if (sv && *sv && SvIOK(*sv))
3732 limit = SvIV(*sv);
3733 }
3734 /************************************************************
3735 * Set up arguments
3736 ************************************************************/
3737 if (argc > 0)
3738 {
3739 nulls = (char *) palloc(argc);
3740 argvalues = (Datum *) palloc(argc * sizeof(Datum));
3741 }
3742 else
3743 {
3744 nulls = NULL;
3745 argvalues = NULL;
3746 }
3747
3748 for (i = 0; i < argc; i++)
3749 {
3750 bool isnull;
3751
3752 argvalues[i] = plperl_sv_to_datum(argv[i],
3753 qdesc->argtypes[i],
3754 -1,
3755 NULL,
3756 &qdesc->arginfuncs[i],
3757 qdesc->argtypioparams[i],
3758 &isnull);
3759 nulls[i] = isnull ? 'n' : ' ';
3760 }
3761
3762 /************************************************************
3763 * go
3764 ************************************************************/
3765 spi_rv = SPI_execute_plan(qdesc->plan, argvalues, nulls,
3766 current_call_data->prodesc->fn_readonly, limit);
3767 ret_hv = plperl_spi_execute_fetch_result(SPI_tuptable, SPI_processed,
3768 spi_rv);
3769 if (argc > 0)
3770 {
3771 pfree(argvalues);
3772 pfree(nulls);
3773 }
3774
3775 /* Commit the inner transaction, return to outer xact context */
3776 ReleaseCurrentSubTransaction();
3777 MemoryContextSwitchTo(oldcontext);
3778 CurrentResourceOwner = oldowner;
3779 }
3780 PG_CATCH();
3781 {
3782 ErrorData *edata;
3783
3784 /* Save error info */
3785 MemoryContextSwitchTo(oldcontext);
3786 edata = CopyErrorData();
3787 FlushErrorState();
3788
3789 /* Abort the inner transaction */
3790 RollbackAndReleaseCurrentSubTransaction();
3791 MemoryContextSwitchTo(oldcontext);
3792 CurrentResourceOwner = oldowner;
3793
3794 /* Punt the error to Perl */
3795 croak_cstr(edata->message);
3796
3797 /* Can't get here, but keep compiler quiet */
3798 return NULL;
3799 }
3800 PG_END_TRY();
3801
3802 return ret_hv;
3803 }
3804
3805 SV *
3806 plperl_spi_query_prepared(char *query, int argc, SV **argv)
3807 {
3808 int i;
3809 char *nulls;
3810 Datum *argvalues;
3811 plperl_query_desc *qdesc;
3812 plperl_query_entry *hash_entry;
3813 SV *cursor;
3814 Portal portal = NULL;
3815
3816 /*
3817 * Execute the query inside a sub-transaction, so we can cope with errors
3818 * sanely
3819 */
3820 MemoryContext oldcontext = CurrentMemoryContext;
3821 ResourceOwner oldowner = CurrentResourceOwner;
3822
3823 check_spi_usage_allowed();
3824
3825 BeginInternalSubTransaction(NULL);
3826 /* Want to run inside function's memory context */
3827 MemoryContextSwitchTo(oldcontext);
3828
3829 PG_TRY();
3830 {
3831 /************************************************************
3832 * Fetch the saved plan descriptor, see if it's o.k.
3833 ************************************************************/
3834 hash_entry = hash_search(plperl_active_interp->query_hash, query,
3835 HASH_FIND, NULL);
3836 if (hash_entry == NULL)
3837 elog(ERROR, "spi_query_prepared: Invalid prepared query passed");
3838
3839 qdesc = hash_entry->query_data;
3840 if (qdesc == NULL)
3841 elog(ERROR, "spi_query_prepared: plperl query_hash value vanished");
3842
3843 if (qdesc->nargs != argc)
3844 elog(ERROR, "spi_query_prepared: expected %d argument(s), %d passed",
3845 qdesc->nargs, argc);
3846
3847 /************************************************************
3848 * Set up arguments
3849 ************************************************************/
3850 if (argc > 0)
3851 {
3852 nulls = (char *) palloc(argc);
3853 argvalues = (Datum *) palloc(argc * sizeof(Datum));
3854 }
3855 else
3856 {
3857 nulls = NULL;
3858 argvalues = NULL;
3859 }
3860
3861 for (i = 0; i < argc; i++)
3862 {
3863 bool isnull;
3864
3865 argvalues[i] = plperl_sv_to_datum(argv[i],
3866 qdesc->argtypes[i],
3867 -1,
3868 NULL,
3869 &qdesc->arginfuncs[i],
3870 qdesc->argtypioparams[i],
3871 &isnull);
3872 nulls[i] = isnull ? 'n' : ' ';
3873 }
3874
3875 /************************************************************
3876 * go
3877 ************************************************************/
3878 portal = SPI_cursor_open(NULL, qdesc->plan, argvalues, nulls,
3879 current_call_data->prodesc->fn_readonly);
3880 if (argc > 0)
3881 {
3882 pfree(argvalues);
3883 pfree(nulls);
3884 }
3885 if (portal == NULL)
3886 elog(ERROR, "SPI_cursor_open() failed:%s",
3887 SPI_result_code_string(SPI_result));
3888
3889 cursor = cstr2sv(portal->name);
3890
3891 PinPortal(portal);
3892
3893 /* Commit the inner transaction, return to outer xact context */
3894 ReleaseCurrentSubTransaction();
3895 MemoryContextSwitchTo(oldcontext);
3896 CurrentResourceOwner = oldowner;
3897 }
3898 PG_CATCH();
3899 {
3900 ErrorData *edata;
3901
3902 /* Save error info */
3903 MemoryContextSwitchTo(oldcontext);
3904 edata = CopyErrorData();
3905 FlushErrorState();
3906
3907 /* Abort the inner transaction */
3908 RollbackAndReleaseCurrentSubTransaction();
3909 MemoryContextSwitchTo(oldcontext);
3910 CurrentResourceOwner = oldowner;
3911
3912 /* Punt the error to Perl */
3913 croak_cstr(edata->message);
3914
3915 /* Can't get here, but keep compiler quiet */
3916 return NULL;
3917 }
3918 PG_END_TRY();
3919
3920 return cursor;
3921 }
3922
3923 void
3924 plperl_spi_freeplan(char *query)
3925 {
3926 SPIPlanPtr plan;
3927 plperl_query_desc *qdesc;
3928 plperl_query_entry *hash_entry;
3929
3930 check_spi_usage_allowed();
3931
3932 hash_entry = hash_search(plperl_active_interp->query_hash, query,
3933 HASH_FIND, NULL);
3934 if (hash_entry == NULL)
3935 elog(ERROR, "spi_freeplan: Invalid prepared query passed");
3936
3937 qdesc = hash_entry->query_data;
3938 if (qdesc == NULL)
3939 elog(ERROR, "spi_freeplan: plperl query_hash value vanished");
3940 plan = qdesc->plan;
3941
3942 /*
3943 * free all memory before SPI_freeplan, so if it dies, nothing will be
3944 * left over
3945 */
3946 hash_search(plperl_active_interp->query_hash, query,
3947 HASH_REMOVE, NULL);
3948
3949 MemoryContextDelete(qdesc->plan_cxt);
3950
3951 SPI_freeplan(plan);
3952 }
3953
3954 void
3955 plperl_spi_commit(void)
3956 {
3957 MemoryContext oldcontext = CurrentMemoryContext;
3958
3959 PG_TRY();
3960 {
3961 SPI_commit();
3962 SPI_start_transaction();
3963 }
3964 PG_CATCH();
3965 {
3966 ErrorData *edata;
3967
3968 /* Save error info */
3969 MemoryContextSwitchTo(oldcontext);
3970 edata = CopyErrorData();
3971 FlushErrorState();
3972
3973 /* Punt the error to Perl */
3974 croak_cstr(edata->message);
3975 }
3976 PG_END_TRY();
3977 }
3978
3979 void
3980 plperl_spi_rollback(void)
3981 {
3982 MemoryContext oldcontext = CurrentMemoryContext;
3983
3984 PG_TRY();
3985 {
3986 SPI_rollback();
3987 SPI_start_transaction();
3988 }
3989 PG_CATCH();
3990 {
3991 ErrorData *edata;
3992
3993 /* Save error info */
3994 MemoryContextSwitchTo(oldcontext);
3995 edata = CopyErrorData();
3996 FlushErrorState();
3997
3998 /* Punt the error to Perl */
3999 croak_cstr(edata->message);
4000 }
4001 PG_END_TRY();
4002 }
4003
4004 /*
4005 * Implementation of plperl's elog() function
4006 *
4007 * If the error level is less than ERROR, we'll just emit the message and
4008 * return. When it is ERROR, elog() will longjmp, which we catch and
4009 * turn into a Perl croak(). Note we are assuming that elog() can't have
4010 * any internal failures that are so bad as to require a transaction abort.
4011 *
4012 * The main reason this is out-of-line is to avoid conflicts between XSUB.h
4013 * and the PG_TRY macros.
4014 */
4015 void
4016 plperl_util_elog(int level, SV *msg)
4017 {
4018 MemoryContext oldcontext = CurrentMemoryContext;
4019 char *volatile cmsg = NULL;
4020
4021 PG_TRY();
4022 {
4023 cmsg = sv2cstr(msg);
4024 elog(level, "%s", cmsg);
4025 pfree(cmsg);
4026 }
4027 PG_CATCH();
4028 {
4029 ErrorData *edata;
4030
4031 /* Must reset elog.c's state */
4032 MemoryContextSwitchTo(oldcontext);
4033 edata = CopyErrorData();
4034 FlushErrorState();
4035
4036 if (cmsg)
4037 pfree(cmsg);
4038
4039 /* Punt the error to Perl */
4040 croak_cstr(edata->message);
4041 }
4042 PG_END_TRY();
4043 }
4044
4045 /*
4046 * Store an SV into a hash table under a key that is a string assumed to be
4047 * in the current database's encoding.
4048 */
4049 static SV **
4050 hv_store_string(HV *hv, const char *key, SV *val)
4051 {
4052 dTHX;
4053 int32 hlen;
4054 char *hkey;
4055 SV **ret;
4056
4057 hkey = pg_server_to_any(key, strlen(key), PG_UTF8);
4058
4059 /*
4060 * hv_store() recognizes a negative klen parameter as meaning a UTF-8
4061 * encoded key.
4062 */
4063 hlen = -(int) strlen(hkey);
4064 ret = hv_store(hv, hkey, hlen, val, 0);
4065
4066 if (hkey != key)
4067 pfree(hkey);
4068
4069 return ret;
4070 }
4071
4072 /*
4073 * Fetch an SV from a hash table under a key that is a string assumed to be
4074 * in the current database's encoding.
4075 */
4076 static SV **
4077 hv_fetch_string(HV *hv, const char *key)
4078 {
4079 dTHX;
4080 int32 hlen;
4081 char *hkey;
4082 SV **ret;
4083
4084 hkey = pg_server_to_any(key, strlen(key), PG_UTF8);
4085
4086 /* See notes in hv_store_string */
4087 hlen = -(int) strlen(hkey);
4088 ret = hv_fetch(hv, hkey, hlen, 0);
4089
4090 if (hkey != key)
4091 pfree(hkey);
4092
4093 return ret;
4094 }
4095
4096 /*
4097 * Provide function name for PL/Perl execution errors
4098 */
4099 static void
4100 plperl_exec_callback(void *arg)
4101 {
4102 char *procname = (char *) arg;
4103
4104 if (procname)
4105 errcontext("PL/Perl function \"%s\"", procname);
4106 }
4107
4108 /*
4109 * Provide function name for PL/Perl compilation errors
4110 */
4111 static void
4112 plperl_compile_callback(void *arg)
4113 {
4114 char *procname = (char *) arg;
4115
4116 if (procname)
4117 errcontext("compilation of PL/Perl function \"%s\"", procname);
4118 }
4119
4120 /*
4121 * Provide error context for the inline handler
4122 */
4123 static void
4124 plperl_inline_callback(void *arg)
4125 {
4126 errcontext("PL/Perl anonymous code block");
4127 }
4128
4129
4130 /*
4131 * Perl's own setlocale(), copied from POSIX.xs
4132 * (needed because of the calls to new_*())
4133 */
4134 #ifdef WIN32
4135 static char *
4136 setlocale_perl(int category, char *locale)
4137 {
4138 dTHX;
4139 char *RETVAL = setlocale(category, locale);
4140
4141 if (RETVAL)
4142 {
4143 #ifdef USE_LOCALE_CTYPE
4144 if (category == LC_CTYPE
4145 #ifdef LC_ALL
4146 || category == LC_ALL
4147 #endif
4148 )
4149 {
4150 char *newctype;
4151
4152 #ifdef LC_ALL
4153 if (category == LC_ALL)
4154 newctype = setlocale(LC_CTYPE, NULL);
4155 else
4156 #endif
4157 newctype = RETVAL;
4158 new_ctype(newctype);
4159 }
4160 #endif /* USE_LOCALE_CTYPE */
4161 #ifdef USE_LOCALE_COLLATE
4162 if (category == LC_COLLATE
4163 #ifdef LC_ALL
4164 || category == LC_ALL
4165 #endif
4166 )
4167 {
4168 char *newcoll;
4169
4170 #ifdef LC_ALL
4171 if (category == LC_ALL)
4172 newcoll = setlocale(LC_COLLATE, NULL);
4173 else
4174 #endif
4175 newcoll = RETVAL;
4176 new_collate(newcoll);
4177 }
4178 #endif /* USE_LOCALE_COLLATE */
4179
4180 #ifdef USE_LOCALE_NUMERIC
4181 if (category == LC_NUMERIC
4182 #ifdef LC_ALL
4183 || category == LC_ALL
4184 #endif
4185 )
4186 {
4187 char *newnum;
4188
4189 #ifdef LC_ALL
4190 if (category == LC_ALL)
4191 newnum = setlocale(LC_NUMERIC, NULL);
4192 else
4193 #endif
4194 newnum = RETVAL;
4195 new_numeric(newnum);
4196 }
4197 #endif /* USE_LOCALE_NUMERIC */
4198 }
4199
4200 return RETVAL;
4201 }
4202
4203 #endif /* WIN32 */
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