src/include/executor/spi.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * spi.h
   4  *                              Server Programming Interface public declarations
   5  *
   6  * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
   7  * Portions Copyright (c) 1994, Regents of the University of California
   8  *
   9  * $PostgreSQL$
  10  *
  11  *-------------------------------------------------------------------------
  12  */
  13 #ifndef SPI_H
  14 #define SPI_H
  15
  16 #include "nodes/parsenodes.h"
  17 #include "utils/portal.h"
  18 #include "utils/relcache.h"
  19 #include "utils/snapshot.h"
  20
  21
  22 typedef struct SPITupleTable
  23 {
  24         MemoryContext tuptabcxt;        /* memory context of result table */
  25         uint32          alloced;                /* # of alloced vals */
  26         uint32          free;                   /* # of free vals */
  27         TupleDesc       tupdesc;                /* tuple descriptor */
  28         HeapTuple  *vals;                       /* tuples */
  29 } SPITupleTable;
  30
  31 /* Plans are opaque structs for standard users of SPI */
  32 typedef struct _SPI_plan *SPIPlanPtr;
  33
  34 #define SPI_ERROR_CONNECT               (-1)
  35 #define SPI_ERROR_COPY                  (-2)
  36 #define SPI_ERROR_OPUNKNOWN             (-3)
  37 #define SPI_ERROR_UNCONNECTED   (-4)
  38 #define SPI_ERROR_CURSOR                (-5)    /* not used anymore */
  39 #define SPI_ERROR_ARGUMENT              (-6)
  40 #define SPI_ERROR_PARAM                 (-7)
  41 #define SPI_ERROR_TRANSACTION   (-8)
  42 #define SPI_ERROR_NOATTRIBUTE   (-9)
  43 #define SPI_ERROR_NOOUTFUNC             (-10)
  44 #define SPI_ERROR_TYPUNKNOWN    (-11)
  45
  46 #define SPI_OK_CONNECT                  1
  47 #define SPI_OK_FINISH                   2
  48 #define SPI_OK_FETCH                    3
  49 #define SPI_OK_UTILITY                  4
  50 #define SPI_OK_SELECT                   5
  51 #define SPI_OK_SELINTO                  6
  52 #define SPI_OK_INSERT                   7
  53 #define SPI_OK_DELETE                   8
  54 #define SPI_OK_UPDATE                   9
  55 #define SPI_OK_CURSOR                   10
  56 #define SPI_OK_INSERT_RETURNING 11
  57 #define SPI_OK_DELETE_RETURNING 12
  58 #define SPI_OK_UPDATE_RETURNING 13
  59 #define SPI_OK_REWRITTEN                14
  60
  61 extern PGDLLIMPORT uint32 SPI_processed;
  62 extern PGDLLIMPORT Oid SPI_lastoid;
  63 extern PGDLLIMPORT SPITupleTable *SPI_tuptable;
  64 extern PGDLLIMPORT int SPI_result;
  65
  66 extern int      SPI_connect(void);
  67 extern int      SPI_finish(void);
  68 extern void SPI_push(void);
  69 extern void SPI_pop(void);
  70 extern bool SPI_push_conditional(void);
  71 extern void SPI_pop_conditional(bool pushed);
  72 extern void SPI_restore_connection(void);
  73 extern int      SPI_execute(const char *src, bool read_only, long tcount);
  74 extern int SPI_execute_plan(SPIPlanPtr plan, Datum *Values, const char *Nulls,
  75                                  bool read_only, long tcount);
  76 extern int      SPI_exec(const char *src, long tcount);
  77 extern int SPI_execp(SPIPlanPtr plan, Datum *Values, const char *Nulls,
  78                   long tcount);
  79 extern int SPI_execute_snapshot(SPIPlanPtr plan,
  80                                          Datum *Values, const char *Nulls,
  81                                          Snapshot snapshot,
  82                                          Snapshot crosscheck_snapshot,
  83                                          bool read_only, bool fire_triggers, long tcount);
  84 extern int      SPI_execute_with_args(const char *src,
  85                                                                   int nargs, Oid *argtypes,
  86                                                                   Datum *Values, const char *Nulls,
  87                                                                   bool read_only, long tcount);
  88 extern SPIPlanPtr SPI_prepare(const char *src, int nargs, Oid *argtypes);
  89 extern SPIPlanPtr SPI_prepare_cursor(const char *src, int nargs, Oid *argtypes,
  90                                    int cursorOptions);
  91 extern SPIPlanPtr SPI_saveplan(SPIPlanPtr plan);
  92 extern int      SPI_freeplan(SPIPlanPtr plan);
  93
  94 extern Oid      SPI_getargtypeid(SPIPlanPtr plan, int argIndex);
  95 extern int      SPI_getargcount(SPIPlanPtr plan);
  96 extern bool SPI_is_cursor_plan(SPIPlanPtr plan);
  97 extern bool SPI_plan_is_valid(SPIPlanPtr plan);
  98 extern const char *SPI_result_code_string(int code);
  99
 100 extern HeapTuple SPI_copytuple(HeapTuple tuple);
 101 extern HeapTupleHeader SPI_returntuple(HeapTuple tuple, TupleDesc tupdesc);
 102 extern HeapTuple SPI_modifytuple(Relation rel, HeapTuple tuple, int natts,
 103                                 int *attnum, Datum *Values, const char *Nulls);
 104 extern int      SPI_fnumber(TupleDesc tupdesc, const char *fname);
 105 extern char *SPI_fname(TupleDesc tupdesc, int fnumber);
 106 extern char *SPI_getvalue(HeapTuple tuple, TupleDesc tupdesc, int fnumber);
 107 extern Datum SPI_getbinval(HeapTuple tuple, TupleDesc tupdesc, int fnumber, bool *isnull);
 108 extern char *SPI_gettype(TupleDesc tupdesc, int fnumber);
 109 extern Oid      SPI_gettypeid(TupleDesc tupdesc, int fnumber);
 110 extern char *SPI_getrelname(Relation rel);
 111 extern char *SPI_getnspname(Relation rel);
 112 extern void *SPI_palloc(Size size);
 113 extern void *SPI_repalloc(void *pointer, Size size);
 114 extern void SPI_pfree(void *pointer);
 115 extern void SPI_freetuple(HeapTuple pointer);
 116 extern void SPI_freetuptable(SPITupleTable *tuptable);
 117
 118 extern Portal SPI_cursor_open(const char *name, SPIPlanPtr plan,
 119                                 Datum *Values, const char *Nulls, bool read_only);
 120 extern Portal SPI_cursor_open_with_args(const char *name,
 121                                                                                 const char *src,
 122                                                                                 int nargs, Oid *argtypes,
 123                                                                                 Datum *Values, const char *Nulls,
 124                                                                                 bool read_only, int cursorOptions);
 125 extern Portal SPI_cursor_find(const char *name);
 126 extern void SPI_cursor_fetch(Portal portal, bool forward, long count);
 127 extern void SPI_cursor_move(Portal portal, bool forward, long count);
 128 extern void SPI_scroll_cursor_fetch(Portal, FetchDirection direction, long count);
 129 extern void SPI_scroll_cursor_move(Portal, FetchDirection direction, long count);
 130 extern void SPI_cursor_close(Portal portal);
 131
 132 extern void AtEOXact_SPI(bool isCommit);
 133 extern void AtEOSubXact_SPI(bool isCommit, SubTransactionId mySubid);
 134
 135 #endif   /* SPI_H */