dlls/msi/sql.y

   1 %{
   2
   3 /*
   4  * Implementation of the Microsoft Installer (msi.dll)
   5  *
   6  * Copyright 2002-2004 Mike McCormack for CodeWeavers
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23
  24 #include "config.h"
  25
  26 #include <stdarg.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29
  30 #include "windef.h"
  31 #include "winbase.h"
  32 #include "query.h"
  33 #include "wine/list.h"
  34 #include "wine/debug.h"
  35
  36 #define YYLEX_PARAM info
  37 #define YYPARSE_PARAM info
  38
  39 static int sql_error(const char *str);
  40
  41 WINE_DEFAULT_DEBUG_CHANNEL(msi);
  42
  43 typedef struct tag_SQL_input
  44 {
  45     MSIDATABASE *db;
  46     LPCWSTR command;
  47     DWORD n, len;
  48     MSIVIEW **view;  /* view structure for the resulting query */
  49     struct list *mem;
  50 } SQL_input;
  51
  52 static LPWSTR SQL_getstring( void *info, const struct sql_str *str );
  53 static INT SQL_getint( void *info );
  54 static int sql_lex( void *SQL_lval, SQL_input *info );
  55
  56 static LPWSTR parser_add_table( LPWSTR list, LPWSTR table );
  57 static void *parser_alloc( void *info, unsigned int sz );
  58 static column_info *parser_alloc_column( void *info, LPCWSTR table, LPCWSTR column );
  59
  60 static BOOL SQL_MarkPrimaryKeys( column_info *cols, column_info *keys);
  61
  62 static struct expr * EXPR_complex( void *info, struct expr *l, UINT op, struct expr *r );
  63 static struct expr * EXPR_unary( void *info, struct expr *l, UINT op );
  64 static struct expr * EXPR_column( void *info, const column_info *column );
  65 static struct expr * EXPR_ival( void *info, int val );
  66 static struct expr * EXPR_sval( void *info, const struct sql_str *str );
  67 static struct expr * EXPR_wildcard( void *info );
  68
  69 %}
  70
  71 %pure-parser
  72
  73 %union
  74 {
  75     struct sql_str str;
  76     LPWSTR string;
  77     column_info *column_list;
  78     MSIVIEW *query;
  79     struct expr *expr;
  80     USHORT column_type;
  81     int integer;
  82 }
  83
  84 %token TK_ALTER TK_AND TK_BY TK_CHAR TK_COMMA TK_CREATE TK_DELETE TK_DROP
  85 %token TK_DISTINCT TK_DOT TK_EQ TK_FREE TK_FROM TK_GE TK_GT TK_HOLD TK_ADD
  86 %token <str> TK_ID
  87 %token TK_ILLEGAL TK_INSERT TK_INT
  88 %token <str> TK_INTEGER
  89 %token TK_INTO TK_IS TK_KEY TK_LE TK_LONG TK_LONGCHAR TK_LP TK_LT
  90 %token TK_LOCALIZABLE TK_MINUS TK_NE TK_NOT TK_NULL
  91 %token TK_OBJECT TK_OR TK_ORDER TK_PRIMARY TK_RP
  92 %token TK_SELECT TK_SET TK_SHORT TK_SPACE TK_STAR
  93 %token <str> TK_STRING
  94 %token TK_TABLE TK_TEMPORARY TK_UPDATE TK_VALUES TK_WHERE TK_WILDCARD
  95
  96 /*
  97  * These are extra tokens used by the lexer but never seen by the
  98  * parser.  We put them in a rule so that the parser generator will
  99  * add them to the parse.h output file.
 100  *
 101  */
 102 %nonassoc END_OF_FILE ILLEGAL SPACE UNCLOSED_STRING COMMENT FUNCTION
 103           COLUMN AGG_FUNCTION.
 104
 105 %type <string> table tablelist id
 106 %type <column_list> selcollist column column_and_type column_def table_def
 107 %type <column_list> column_assignment update_assign_list constlist
 108 %type <query> query from fromtable selectfrom unorderedsel
 109 %type <query> oneupdate onedelete oneselect onequery onecreate oneinsert onealter onedrop
 110 %type <expr> expr val column_val const_val
 111 %type <column_type> column_type data_type data_type_l data_count
 112 %type <integer> number alterop
 113
 114 /* Reference: http://mates.ms.mff.cuni.cz/oracle/doc/ora815nt/server.815/a67779/operator.htm */
 115 %left TK_OR
 116 %left TK_AND
 117 %left TK_NOT
 118 %left TK_EQ TK_NE TK_LT TK_GT TK_LE TK_GE TK_LIKE
 119 %right TK_NEGATION
 120
 121 %%
 122
 123 query:
 124     onequery
 125     {
 126         SQL_input* sql = (SQL_input*) info;
 127         *sql->view = $1;
 128     }
 129     ;
 130
 131 onequery:
 132     oneselect
 133   | onecreate
 134   | oneinsert
 135   | oneupdate
 136   | onedelete
 137   | onealter
 138   | onedrop
 139     ;
 140
 141 oneinsert:
 142     TK_INSERT TK_INTO table TK_LP selcollist TK_RP TK_VALUES TK_LP constlist TK_RP
 143         {
 144             SQL_input *sql = (SQL_input*) info;
 145             MSIVIEW *insert = NULL;
 146
 147             INSERT_CreateView( sql->db, &insert, $3, $5, $9, FALSE );
 148             if( !insert )
 149                 YYABORT;
 150             $$ = insert;
 151         }
 152   | TK_INSERT TK_INTO table TK_LP selcollist TK_RP TK_VALUES TK_LP constlist TK_RP TK_TEMPORARY
 153         {
 154             SQL_input *sql = (SQL_input*) info;
 155             MSIVIEW *insert = NULL;
 156
 157             INSERT_CreateView( sql->db, &insert, $3, $5, $9, TRUE );
 158             if( !insert )
 159                 YYABORT;
 160             $$ = insert;
 161         }
 162     ;
 163
 164 onecreate:
 165     TK_CREATE TK_TABLE table TK_LP table_def TK_RP
 166         {
 167             SQL_input* sql = (SQL_input*) info;
 168             MSIVIEW *create = NULL;
 169
 170             if( !$5 )
 171                 YYABORT;
 172             CREATE_CreateView( sql->db, &create, $3, $5, FALSE );
 173             if( !create )
 174                 YYABORT;
 175             $$ = create;
 176         }
 177   | TK_CREATE TK_TABLE table TK_LP table_def TK_RP TK_HOLD
 178         {
 179             SQL_input* sql = (SQL_input*) info;
 180             MSIVIEW *create = NULL;
 181
 182             if( !$5 )
 183                 YYABORT;
 184             CREATE_CreateView( sql->db, &create, $3, $5, TRUE );
 185             if( !create )
 186                 YYABORT;
 187             $$ = create;
 188         }
 189     ;
 190
 191 oneupdate:
 192     TK_UPDATE table TK_SET update_assign_list TK_WHERE expr
 193         {
 194             SQL_input* sql = (SQL_input*) info;
 195             MSIVIEW *update = NULL;
 196
 197             UPDATE_CreateView( sql->db, &update, $2, $4, $6 );
 198             if( !update )
 199                 YYABORT;
 200             $$ = update;
 201         }
 202   | TK_UPDATE table TK_SET update_assign_list
 203         {
 204             SQL_input* sql = (SQL_input*) info;
 205             MSIVIEW *update = NULL;
 206
 207             UPDATE_CreateView( sql->db, &update, $2, $4, NULL );
 208             if( !update )
 209                 YYABORT;
 210             $$ = update;
 211         }
 212     ;
 213
 214 onedelete:
 215     TK_DELETE from
 216         {
 217             SQL_input* sql = (SQL_input*) info;
 218             MSIVIEW *delete = NULL;
 219
 220             DELETE_CreateView( sql->db, &delete, $2 );
 221             if( !delete )
 222                 YYABORT;
 223             $$ = delete;
 224         }
 225     ;
 226
 227 onealter:
 228     TK_ALTER TK_TABLE table alterop
 229         {
 230             SQL_input* sql = (SQL_input*) info;
 231             MSIVIEW *alter = NULL;
 232
 233             ALTER_CreateView( sql->db, &alter, $3, NULL, $4 );
 234             if( !alter )
 235                 YYABORT;
 236             $$ = alter;
 237         }
 238   | TK_ALTER TK_TABLE table TK_ADD column_and_type
 239         {
 240             SQL_input *sql = (SQL_input *)info;
 241             MSIVIEW *alter = NULL;
 242
 243             ALTER_CreateView( sql->db, &alter, $3, $5, 0 );
 244             if (!alter)
 245                 YYABORT;
 246             $$ = alter;
 247         }
 248   | TK_ALTER TK_TABLE table TK_ADD column_and_type TK_HOLD
 249         {
 250             SQL_input *sql = (SQL_input *)info;
 251             MSIVIEW *alter = NULL;
 252
 253             ALTER_CreateView( sql->db, &alter, $3, $5, 1 );
 254             if (!alter)
 255                 YYABORT;
 256             $$ = alter;
 257         }
 258     ;
 259
 260 alterop:
 261     TK_HOLD
 262         {
 263             $$ = 1;
 264         }
 265   | TK_FREE
 266         {
 267             $$ = -1;
 268         }
 269   ;
 270
 271 onedrop:
 272     TK_DROP TK_TABLE table
 273         {
 274             SQL_input* sql = (SQL_input*) info;
 275             UINT r;
 276
 277             $$ = NULL;
 278             r = DROP_CreateView( sql->db, &$$, $3 );
 279             if( r != ERROR_SUCCESS || !$$ )
 280                 YYABORT;
 281         }
 282   ;
 283
 284 table_def:
 285     column_def TK_PRIMARY TK_KEY selcollist
 286         {
 287             if( SQL_MarkPrimaryKeys( $1, $4 ) )
 288                 $$ = $1;
 289             else
 290                 $$ = NULL;
 291         }
 292     ;
 293
 294 column_def:
 295     column_def TK_COMMA column_and_type
 296         {
 297             column_info *ci;
 298
 299             for( ci = $1; ci->next; ci = ci->next )
 300                 ;
 301
 302             ci->next = $3;
 303             $$ = $1;
 304         }
 305   | column_and_type
 306         {
 307             $$ = $1;
 308         }
 309     ;
 310
 311 column_and_type:
 312     column column_type
 313         {
 314             $$ = $1;
 315             $$->type = ($2 | MSITYPE_VALID);
 316             $$->temporary = $2 & MSITYPE_TEMPORARY ? TRUE : FALSE;
 317         }
 318     ;
 319
 320 column_type:
 321     data_type_l
 322         {
 323             $$ = $1;
 324         }
 325   | data_type_l TK_LOCALIZABLE
 326         {
 327             $$ = $1 | MSITYPE_LOCALIZABLE;
 328         }
 329   | data_type_l TK_TEMPORARY
 330         {
 331             $$ = $1 | MSITYPE_TEMPORARY;
 332         }
 333     ;
 334
 335 data_type_l:
 336     data_type
 337         {
 338             $$ |= MSITYPE_NULLABLE;
 339         }
 340   | data_type TK_NOT TK_NULL
 341         {
 342             $$ = $1;
 343         }
 344     ;
 345
 346 data_type:
 347     TK_CHAR
 348         {
 349             $$ = MSITYPE_STRING | 1;
 350         }
 351   | TK_CHAR TK_LP data_count TK_RP
 352         {
 353             $$ = MSITYPE_STRING | 0x400 | $3;
 354         }
 355   | TK_LONGCHAR
 356         {
 357             $$ = 2;
 358         }
 359   | TK_SHORT
 360         {
 361             $$ = 2;
 362         }
 363   | TK_INT
 364         {
 365             $$ = 2;
 366         }
 367   | TK_LONG
 368         {
 369             $$ = 4;
 370         }
 371   | TK_OBJECT
 372         {
 373             $$ = MSITYPE_STRING | MSITYPE_VALID;
 374         }
 375     ;
 376
 377 data_count:
 378     number
 379         {
 380             if( ( $1 > 255 ) || ( $1 < 0 ) )
 381                 YYABORT;
 382             $$ = $1;
 383         }
 384     ;
 385
 386 oneselect:
 387     unorderedsel TK_ORDER TK_BY selcollist
 388         {
 389             UINT r;
 390
 391             if( $4 )
 392             {
 393                 r = $1->ops->sort( $1, $4 );
 394                 if ( r != ERROR_SUCCESS)
 395                     YYABORT;
 396             }
 397
 398             $$ = $1;
 399         }
 400   | unorderedsel
 401     ;
 402
 403 unorderedsel:
 404     TK_SELECT selectfrom
 405         {
 406             $$ = $2;
 407         }
 408   | TK_SELECT TK_DISTINCT selectfrom
 409         {
 410             SQL_input* sql = (SQL_input*) info;
 411             UINT r;
 412
 413             $$ = NULL;
 414             r = DISTINCT_CreateView( sql->db, &$$, $3 );
 415             if (r != ERROR_SUCCESS)
 416             {
 417                 $3->ops->delete($3);
 418                 YYABORT;
 419             }
 420         }
 421     ;
 422
 423 selectfrom:
 424     selcollist from
 425         {
 426             SQL_input* sql = (SQL_input*) info;
 427             UINT r;
 428
 429             $$ = NULL;
 430             if( $1 )
 431             {
 432                 r = SELECT_CreateView( sql->db, &$$, $2, $1 );
 433                 if (r != ERROR_SUCCESS)
 434                 {
 435                     $2->ops->delete($2);
 436                     YYABORT;
 437                 }
 438             }
 439             else
 440                 $$ = $2;
 441         }
 442     ;
 443
 444 selcollist:
 445     column
 446   | column TK_COMMA selcollist
 447         {
 448             $1->next = $3;
 449         }
 450   | TK_STAR
 451         {
 452             $$ = NULL;
 453         }
 454     ;
 455
 456 from:
 457     fromtable
 458   | fromtable TK_WHERE expr
 459         {
 460             SQL_input* sql = (SQL_input*) info;
 461             UINT r;
 462
 463             $$ = NULL;
 464             r = WHERE_CreateView( sql->db, &$$, $1, $3 );
 465             if( r != ERROR_SUCCESS )
 466             {
 467                 $1->ops->delete( $1 );
 468                 YYABORT;
 469             }
 470         }
 471     ;
 472
 473 fromtable:
 474     TK_FROM table
 475         {
 476             SQL_input* sql = (SQL_input*) info;
 477             UINT r;
 478
 479             $$ = NULL;
 480             r = TABLE_CreateView( sql->db, $2, &$$ );
 481             if( r != ERROR_SUCCESS || !$$ )
 482                 YYABORT;
 483         }
 484   | TK_FROM tablelist
 485         {
 486             SQL_input* sql = (SQL_input*) info;
 487             UINT r;
 488
 489             r = JOIN_CreateView( sql->db, &$$, $2 );
 490             msi_free( $2 );
 491             if( r != ERROR_SUCCESS )
 492                 YYABORT;
 493         }
 494     ;
 495
 496 tablelist:
 497     table
 498         {
 499             $$ = strdupW($1);
 500         }
 501   |
 502     table TK_COMMA tablelist
 503         {
 504             $$ = parser_add_table($3, $1);
 505             if (!$$)
 506                 YYABORT;
 507         }
 508     ;
 509
 510 expr:
 511     TK_LP expr TK_RP
 512         {
 513             $$ = $2;
 514             if( !$$ )
 515                 YYABORT;
 516         }
 517   | expr TK_AND expr
 518         {
 519             $$ = EXPR_complex( info, $1, OP_AND, $3 );
 520             if( !$$ )
 521                 YYABORT;
 522         }
 523   | expr TK_OR expr
 524         {
 525             $$ = EXPR_complex( info, $1, OP_OR, $3 );
 526             if( !$$ )
 527                 YYABORT;
 528         }
 529   | column_val TK_EQ val
 530         {
 531             $$ = EXPR_complex( info, $1, OP_EQ, $3 );
 532             if( !$$ )
 533                 YYABORT;
 534         }
 535   | column_val TK_GT val
 536         {
 537             $$ = EXPR_complex( info, $1, OP_GT, $3 );
 538             if( !$$ )
 539                 YYABORT;
 540         }
 541   | column_val TK_LT val
 542         {
 543             $$ = EXPR_complex( info, $1, OP_LT, $3 );
 544             if( !$$ )
 545                 YYABORT;
 546         }
 547   | column_val TK_LE val
 548         {
 549             $$ = EXPR_complex( info, $1, OP_LE, $3 );
 550             if( !$$ )
 551                 YYABORT;
 552         }
 553   | column_val TK_GE val
 554         {
 555             $$ = EXPR_complex( info, $1, OP_GE, $3 );
 556             if( !$$ )
 557                 YYABORT;
 558         }
 559   | column_val TK_NE val
 560         {
 561             $$ = EXPR_complex( info, $1, OP_NE, $3 );
 562             if( !$$ )
 563                 YYABORT;
 564         }
 565   | column_val TK_IS TK_NULL
 566         {
 567             $$ = EXPR_unary( info, $1, OP_ISNULL );
 568             if( !$$ )
 569                 YYABORT;
 570         }
 571   | column_val TK_IS TK_NOT TK_NULL
 572         {
 573             $$ = EXPR_unary( info, $1, OP_NOTNULL );
 574             if( !$$ )
 575                 YYABORT;
 576         }
 577     ;
 578
 579 val:
 580     column_val
 581   | const_val
 582     ;
 583
 584 constlist:
 585     const_val
 586         {
 587             $$ = parser_alloc_column( info, NULL, NULL );
 588             if( !$$ )
 589                 YYABORT;
 590             $$->val = $1;
 591         }
 592   | const_val TK_COMMA constlist
 593         {
 594             $$ = parser_alloc_column( info, NULL, NULL );
 595             if( !$$ )
 596                 YYABORT;
 597             $$->val = $1;
 598             $$->next = $3;
 599         }
 600     ;
 601
 602 update_assign_list:
 603     column_assignment
 604   | column_assignment TK_COMMA update_assign_list
 605         {
 606             $$ = $1;
 607             $$->next = $3;
 608         }
 609     ;
 610
 611 column_assignment:
 612     column TK_EQ const_val
 613         {
 614             $$ = $1;
 615             $$->val = $3;
 616         }
 617     ;
 618
 619 const_val:
 620     number
 621         {
 622             $$ = EXPR_ival( info, $1 );
 623             if( !$$ )
 624                 YYABORT;
 625         }
 626   | TK_MINUS number %prec TK_NEGATION
 627         {
 628             $$ = EXPR_ival( info, -$2 );
 629             if( !$$ )
 630                 YYABORT;
 631         }
 632   | TK_STRING
 633         {
 634             $$ = EXPR_sval( info, &$1 );
 635             if( !$$ )
 636                 YYABORT;
 637         }
 638   | TK_WILDCARD
 639         {
 640             $$ = EXPR_wildcard( info );
 641             if( !$$ )
 642                 YYABORT;
 643         }
 644     ;
 645
 646 column_val:
 647     column
 648         {
 649             $$ = EXPR_column( info, $1 );
 650             if( !$$ )
 651                 YYABORT;
 652         }
 653     ;
 654
 655 column:
 656     table TK_DOT id
 657         {
 658             $$ = parser_alloc_column( info, $1, $3 );
 659             if( !$$ )
 660                 YYABORT;
 661         }
 662   | id
 663         {
 664             $$ = parser_alloc_column( info, NULL, $1 );
 665             if( !$$ )
 666                 YYABORT;
 667         }
 668     ;
 669
 670 table:
 671     id
 672         {
 673             $$ = $1;
 674         }
 675     ;
 676
 677 id:
 678     TK_ID
 679         {
 680             $$ = SQL_getstring( info, &$1 );
 681             if( !$$ )
 682                 YYABORT;
 683         }
 684     ;
 685
 686 number:
 687     TK_INTEGER
 688         {
 689             $$ = SQL_getint( info );
 690         }
 691     ;
 692
 693 %%
 694
 695 static LPWSTR parser_add_table(LPWSTR list, LPWSTR table)
 696 {
 697     DWORD size = lstrlenW(list) + lstrlenW(table) + 2;
 698     static const WCHAR space[] = {' ',0};
 699
 700     list = msi_realloc(list, size * sizeof(WCHAR));
 701     if (!list) return NULL;
 702
 703     lstrcatW(list, space);
 704     lstrcatW(list, table);
 705     return list;
 706 }
 707
 708 static void *parser_alloc( void *info, unsigned int sz )
 709 {
 710     SQL_input* sql = (SQL_input*) info;
 711     struct list *mem;
 712
 713     mem = msi_alloc( sizeof (struct list) + sz );
 714     list_add_tail( sql->mem, mem );
 715     return &mem[1];
 716 }
 717
 718 static column_info *parser_alloc_column( void *info, LPCWSTR table, LPCWSTR column )
 719 {
 720     column_info *col;
 721
 722     col = parser_alloc( info, sizeof (*col) );
 723     if( col )
 724     {
 725         col->table = table;
 726         col->column = column;
 727         col->val = NULL;
 728         col->type = 0;
 729         col->next = NULL;
 730     }
 731
 732     return col;
 733 }
 734
 735 static int sql_lex( void *SQL_lval, SQL_input *sql )
 736 {
 737     int token;
 738     struct sql_str * str = SQL_lval;
 739
 740     do
 741     {
 742         sql->n += sql->len;
 743         if( ! sql->command[sql->n] )
 744             return 0;  /* end of input */
 745
 746         /* TRACE("string : %s\n", debugstr_w(&sql->command[sql->n])); */
 747         sql->len = sqliteGetToken( &sql->command[sql->n], &token );
 748         if( sql->len==0 )
 749             break;
 750         str->data = &sql->command[sql->n];
 751         str->len = sql->len;
 752     }
 753     while( token == TK_SPACE );
 754
 755     /* TRACE("token : %d (%s)\n", token, debugstr_wn(&sql->command[sql->n], sql->len)); */
 756
 757     return token;
 758 }
 759
 760 LPWSTR SQL_getstring( void *info, const struct sql_str *strdata )
 761 {
 762     LPCWSTR p = strdata->data;
 763     UINT len = strdata->len;
 764     LPWSTR str;
 765
 766     /* if there's quotes, remove them */
 767     if( ( (p[0]=='`') && (p[len-1]=='`') ) ||
 768         ( (p[0]=='\'') && (p[len-1]=='\'') ) )
 769     {
 770         p++;
 771         len -= 2;
 772     }
 773     str = parser_alloc( info, (len + 1)*sizeof(WCHAR) );
 774     if( !str )
 775         return str;
 776     memcpy( str, p, len*sizeof(WCHAR) );
 777     str[len]=0;
 778
 779     return str;
 780 }
 781
 782 INT SQL_getint( void *info )
 783 {
 784     SQL_input* sql = (SQL_input*) info;
 785     LPCWSTR p = &sql->command[sql->n];
 786     INT i, r = 0;
 787
 788     for( i=0; i<sql->len; i++ )
 789     {
 790         if( '0' > p[i] || '9' < p[i] )
 791         {
 792             ERR("should only be numbers here!\n");
 793             break;
 794         }
 795         r = (p[i]-'0') + r*10;
 796     }
 797
 798     return r;
 799 }
 800
 801 static int sql_error( const char *str )
 802 {
 803     return 0;
 804 }
 805
 806 static struct expr * EXPR_wildcard( void *info )
 807 {
 808     struct expr *e = parser_alloc( info, sizeof *e );
 809     if( e )
 810     {
 811         e->type = EXPR_WILDCARD;
 812     }
 813     return e;
 814 }
 815
 816 static struct expr * EXPR_complex( void *info, struct expr *l, UINT op, struct expr *r )
 817 {
 818     struct expr *e = parser_alloc( info, sizeof *e );
 819     if( e )
 820     {
 821         e->type = EXPR_COMPLEX;
 822         e->u.expr.left = l;
 823         e->u.expr.op = op;
 824         e->u.expr.right = r;
 825     }
 826     return e;
 827 }
 828
 829 static struct expr * EXPR_unary( void *info, struct expr *l, UINT op )
 830 {
 831     struct expr *e = parser_alloc( info, sizeof *e );
 832     if( e )
 833     {
 834         e->type = EXPR_UNARY;
 835         e->u.expr.left = l;
 836         e->u.expr.op = op;
 837         e->u.expr.right = NULL;
 838     }
 839     return e;
 840 }
 841
 842 static struct expr * EXPR_column( void *info, const column_info *column )
 843 {
 844     struct expr *e = parser_alloc( info, sizeof *e );
 845     if( e )
 846     {
 847         e->type = EXPR_COLUMN;
 848         e->u.sval = column->column;
 849     }
 850     return e;
 851 }
 852
 853 static struct expr * EXPR_ival( void *info, int val )
 854 {
 855     struct expr *e = parser_alloc( info, sizeof *e );
 856     if( e )
 857     {
 858         e->type = EXPR_IVAL;
 859         e->u.ival = val;
 860     }
 861     return e;
 862 }
 863
 864 static struct expr * EXPR_sval( void *info, const struct sql_str *str )
 865 {
 866     struct expr *e = parser_alloc( info, sizeof *e );
 867     if( e )
 868     {
 869         e->type = EXPR_SVAL;
 870         e->u.sval = SQL_getstring( info, str );
 871     }
 872     return e;
 873 }
 874
 875 static BOOL SQL_MarkPrimaryKeys( column_info *cols,
 876                                  column_info *keys )
 877 {
 878     column_info *k;
 879     BOOL found = TRUE;
 880
 881     for( k = keys; k && found; k = k->next )
 882     {
 883         column_info *c;
 884
 885         found = FALSE;
 886         for( c = cols; c && !found; c = c->next )
 887         {
 888              if( lstrcmpW( k->column, c->column ) )
 889                  continue;
 890              c->type |= MSITYPE_KEY;
 891              found = TRUE;
 892         }
 893     }
 894
 895     return found;
 896 }
 897
 898 UINT MSI_ParseSQL( MSIDATABASE *db, LPCWSTR command, MSIVIEW **phview,
 899                    struct list *mem )
 900 {
 901     SQL_input sql;
 902     int r;
 903
 904     *phview = NULL;
 905
 906     sql.db = db;
 907     sql.command = command;
 908     sql.n = 0;
 909     sql.len = 0;
 910     sql.view = phview;
 911     sql.mem = mem;
 912
 913     r = sql_parse(&sql);
 914
 915     TRACE("Parse returned %d\n", r);
 916     if( r )
 917     {
 918         *sql.view = NULL;
 919         return ERROR_BAD_QUERY_SYNTAX;
 920     }
 921
 922     return ERROR_SUCCESS;
 923 }