src/include/access/tupconvert.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * tupconvert.h
   4  *        Tuple conversion support.
   5  *
   6  *
   7  * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
   8  * Portions Copyright (c) 1994, Regents of the University of California
   9  *
  10  * src/include/access/tupconvert.h
  11  *
  12  *-------------------------------------------------------------------------
  13  */
  14 #ifndef TUPCONVERT_H
  15 #define TUPCONVERT_H
  16
  17 #include "access/attmap.h"
  18 #include "access/htup.h"
  19 #include "access/tupdesc.h"
  20 #include "executor/tuptable.h"
  21 #include "nodes/bitmapset.h"
  22
  23
  24 typedef struct TupleConversionMap
  25 {
  26         TupleDesc       indesc;                 /* tupdesc for source rowtype */
  27         TupleDesc       outdesc;                /* tupdesc for result rowtype */
  28         AttrMap    *attrMap;            /* indexes of input fields, or 0 for null */
  29         Datum      *invalues;           /* workspace for deconstructing source */
  30         bool       *inisnull;
  31         Datum      *outvalues;          /* workspace for constructing result */
  32         bool       *outisnull;
  33 } TupleConversionMap;
  34
  35
  36 extern TupleConversionMap *convert_tuples_by_position(TupleDesc indesc,
  37                                                                                                           TupleDesc outdesc,
  38                                                                                                           const char *msg);
  39
  40 extern TupleConversionMap *convert_tuples_by_name(TupleDesc indesc,
  41                                                                                                   TupleDesc outdesc);
  42
  43 extern HeapTuple execute_attr_map_tuple(HeapTuple tuple, TupleConversionMap *map);
  44 extern TupleTableSlot *execute_attr_map_slot(AttrMap *attrMap,
  45                                                                                          TupleTableSlot *in_slot,
  46                                                                                          TupleTableSlot *out_slot);
  47 extern Bitmapset *execute_attr_map_cols(AttrMap *attrMap, Bitmapset *inbitmap);
  48
  49 extern void free_conversion_map(TupleConversionMap *map);
  50
  51 #endif                                                  /* TUPCONVERT_H */