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funcapi.c
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1 /*-------------------------------------------------------------------------
2  *
3  * funcapi.c
4  * Utility and convenience functions for fmgr functions that return
5  * sets and/or composite types.
6  *
7  * Copyright (c) 2002-2017, PostgreSQL Global Development Group
8  *
9  * IDENTIFICATION
10  * src/backend/utils/fmgr/funcapi.c
11  *
12  *-------------------------------------------------------------------------
13  */
14 #include "postgres.h"
15 
16 #include "access/htup_details.h"
17 #include "catalog/namespace.h"
18 #include "catalog/pg_proc.h"
19 #include "catalog/pg_type.h"
20 #include "funcapi.h"
21 #include "nodes/nodeFuncs.h"
22 #include "parser/parse_coerce.h"
23 #include "utils/array.h"
24 #include "utils/builtins.h"
25 #include "utils/lsyscache.h"
26 #include "utils/memutils.h"
27 #include "utils/regproc.h"
28 #include "utils/rel.h"
29 #include "utils/syscache.h"
30 #include "utils/typcache.h"
31 
32 
33 static void shutdown_MultiFuncCall(Datum arg);
35  Node *call_expr,
36  ReturnSetInfo *rsinfo,
37  Oid *resultTypeId,
38  TupleDesc *resultTupleDesc);
39 static bool resolve_polymorphic_tupdesc(TupleDesc tupdesc,
40  oidvector *declared_args,
41  Node *call_expr);
43 
44 
45 /*
46  * init_MultiFuncCall
47  * Create an empty FuncCallContext data structure
48  * and do some other basic Multi-function call setup
49  * and error checking
50  */
53 {
54  FuncCallContext *retval;
55 
56  /*
57  * Bail if we're called in the wrong context
58  */
59  if (fcinfo->resultinfo == NULL || !IsA(fcinfo->resultinfo, ReturnSetInfo))
60  ereport(ERROR,
61  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
62  errmsg("set-valued function called in context that cannot accept a set")));
63 
64  if (fcinfo->flinfo->fn_extra == NULL)
65  {
66  /*
67  * First call
68  */
69  ReturnSetInfo *rsi = (ReturnSetInfo *) fcinfo->resultinfo;
70  MemoryContext multi_call_ctx;
71 
72  /*
73  * Create a suitably long-lived context to hold cross-call data
74  */
75  multi_call_ctx = AllocSetContextCreate(fcinfo->flinfo->fn_mcxt,
76  "SRF multi-call context",
78 
79  /*
80  * Allocate suitably long-lived space and zero it
81  */
82  retval = (FuncCallContext *)
83  MemoryContextAllocZero(multi_call_ctx,
84  sizeof(FuncCallContext));
85 
86  /*
87  * initialize the elements
88  */
89  retval->call_cntr = 0;
90  retval->max_calls = 0;
91  retval->slot = NULL;
92  retval->user_fctx = NULL;
93  retval->attinmeta = NULL;
94  retval->tuple_desc = NULL;
95  retval->multi_call_memory_ctx = multi_call_ctx;
96 
97  /*
98  * save the pointer for cross-call use
99  */
100  fcinfo->flinfo->fn_extra = retval;
101 
102  /*
103  * Ensure we will get shut down cleanly if the exprcontext is not run
104  * to completion.
105  */
108  PointerGetDatum(fcinfo->flinfo));
109  }
110  else
111  {
112  /* second and subsequent calls */
113  elog(ERROR, "init_MultiFuncCall cannot be called more than once");
114 
115  /* never reached, but keep compiler happy */
116  retval = NULL;
117  }
118 
119  return retval;
120 }
121 
122 /*
123  * per_MultiFuncCall
124  *
125  * Do Multi-function per-call setup
126  */
129 {
130  FuncCallContext *retval = (FuncCallContext *) fcinfo->flinfo->fn_extra;
131 
132  /*
133  * Clear the TupleTableSlot, if present. This is for safety's sake: the
134  * Slot will be in a long-lived context (it better be, if the
135  * FuncCallContext is pointing to it), but in most usage patterns the
136  * tuples stored in it will be in the function's per-tuple context. So at
137  * the beginning of each call, the Slot will hold a dangling pointer to an
138  * already-recycled tuple. We clear it out here.
139  *
140  * Note: use of retval->slot is obsolete as of 8.0, and we expect that it
141  * will always be NULL. This is just here for backwards compatibility in
142  * case someone creates a slot anyway.
143  */
144  if (retval->slot != NULL)
145  ExecClearTuple(retval->slot);
146 
147  return retval;
148 }
149 
150 /*
151  * end_MultiFuncCall
152  * Clean up after init_MultiFuncCall
153  */
154 void
156 {
157  ReturnSetInfo *rsi = (ReturnSetInfo *) fcinfo->resultinfo;
158 
159  /* Deregister the shutdown callback */
162  PointerGetDatum(fcinfo->flinfo));
163 
164  /* But use it to do the real work */
165  shutdown_MultiFuncCall(PointerGetDatum(fcinfo->flinfo));
166 }
167 
168 /*
169  * shutdown_MultiFuncCall
170  * Shutdown function to clean up after init_MultiFuncCall
171  */
172 static void
174 {
175  FmgrInfo *flinfo = (FmgrInfo *) DatumGetPointer(arg);
176  FuncCallContext *funcctx = (FuncCallContext *) flinfo->fn_extra;
177 
178  /* unbind from flinfo */
179  flinfo->fn_extra = NULL;
180 
181  /*
182  * Delete context that holds all multi-call data, including the
183  * FuncCallContext itself
184  */
186 }
187 
188 
189 /*
190  * get_call_result_type
191  * Given a function's call info record, determine the kind of datatype
192  * it is supposed to return. If resultTypeId isn't NULL, *resultTypeId
193  * receives the actual datatype OID (this is mainly useful for scalar
194  * result types). If resultTupleDesc isn't NULL, *resultTupleDesc
195  * receives a pointer to a TupleDesc when the result is of a composite
196  * type, or NULL when it's a scalar result.
197  *
198  * One hard case that this handles is resolution of actual rowtypes for
199  * functions returning RECORD (from either the function's OUT parameter
200  * list, or a ReturnSetInfo context node). TYPEFUNC_RECORD is returned
201  * only when we couldn't resolve the actual rowtype for lack of information.
202  *
203  * The other hard case that this handles is resolution of polymorphism.
204  * We will never return polymorphic pseudotypes (ANYELEMENT etc), either
205  * as a scalar result type or as a component of a rowtype.
206  *
207  * This function is relatively expensive --- in a function returning set,
208  * try to call it only the first time through.
209  */
212  Oid *resultTypeId,
213  TupleDesc *resultTupleDesc)
214 {
215  return internal_get_result_type(fcinfo->flinfo->fn_oid,
216  fcinfo->flinfo->fn_expr,
217  (ReturnSetInfo *) fcinfo->resultinfo,
218  resultTypeId,
219  resultTupleDesc);
220 }
221 
222 /*
223  * get_expr_result_type
224  * As above, but work from a calling expression node tree
225  */
228  Oid *resultTypeId,
229  TupleDesc *resultTupleDesc)
230 {
231  TypeFuncClass result;
232 
233  if (expr && IsA(expr, FuncExpr))
234  result = internal_get_result_type(((FuncExpr *) expr)->funcid,
235  expr,
236  NULL,
237  resultTypeId,
238  resultTupleDesc);
239  else if (expr && IsA(expr, OpExpr))
240  result = internal_get_result_type(get_opcode(((OpExpr *) expr)->opno),
241  expr,
242  NULL,
243  resultTypeId,
244  resultTupleDesc);
245  else
246  {
247  /* handle as a generic expression; no chance to resolve RECORD */
248  Oid typid = exprType(expr);
249 
250  if (resultTypeId)
251  *resultTypeId = typid;
252  if (resultTupleDesc)
253  *resultTupleDesc = NULL;
254  result = get_type_func_class(typid);
255  if (result == TYPEFUNC_COMPOSITE && resultTupleDesc)
256  *resultTupleDesc = lookup_rowtype_tupdesc_copy(typid, -1);
257  }
258 
259  return result;
260 }
261 
262 /*
263  * get_func_result_type
264  * As above, but work from a function's OID only
265  *
266  * This will not be able to resolve pure-RECORD results nor polymorphism.
267  */
270  Oid *resultTypeId,
271  TupleDesc *resultTupleDesc)
272 {
273  return internal_get_result_type(functionId,
274  NULL,
275  NULL,
276  resultTypeId,
277  resultTupleDesc);
278 }
279 
280 /*
281  * internal_get_result_type -- workhorse code implementing all the above
282  *
283  * funcid must always be supplied. call_expr and rsinfo can be NULL if not
284  * available. We will return TYPEFUNC_RECORD, and store NULL into
285  * *resultTupleDesc, if we cannot deduce the complete result rowtype from
286  * the available information.
287  */
288 static TypeFuncClass
290  Node *call_expr,
291  ReturnSetInfo *rsinfo,
292  Oid *resultTypeId,
293  TupleDesc *resultTupleDesc)
294 {
295  TypeFuncClass result;
296  HeapTuple tp;
297  Form_pg_proc procform;
298  Oid rettype;
299  TupleDesc tupdesc;
300 
301  /* First fetch the function's pg_proc row to inspect its rettype */
303  if (!HeapTupleIsValid(tp))
304  elog(ERROR, "cache lookup failed for function %u", funcid);
305  procform = (Form_pg_proc) GETSTRUCT(tp);
306 
307  rettype = procform->prorettype;
308 
309  /* Check for OUT parameters defining a RECORD result */
310  tupdesc = build_function_result_tupdesc_t(tp);
311  if (tupdesc)
312  {
313  /*
314  * It has OUT parameters, so it's basically like a regular composite
315  * type, except we have to be able to resolve any polymorphic OUT
316  * parameters.
317  */
318  if (resultTypeId)
319  *resultTypeId = rettype;
320 
321  if (resolve_polymorphic_tupdesc(tupdesc,
322  &procform->proargtypes,
323  call_expr))
324  {
325  if (tupdesc->tdtypeid == RECORDOID &&
326  tupdesc->tdtypmod < 0)
327  assign_record_type_typmod(tupdesc);
328  if (resultTupleDesc)
329  *resultTupleDesc = tupdesc;
330  result = TYPEFUNC_COMPOSITE;
331  }
332  else
333  {
334  if (resultTupleDesc)
335  *resultTupleDesc = NULL;
336  result = TYPEFUNC_RECORD;
337  }
338 
339  ReleaseSysCache(tp);
340 
341  return result;
342  }
343 
344  /*
345  * If scalar polymorphic result, try to resolve it.
346  */
347  if (IsPolymorphicType(rettype))
348  {
349  Oid newrettype = exprType(call_expr);
350 
351  if (newrettype == InvalidOid) /* this probably should not happen */
352  ereport(ERROR,
353  (errcode(ERRCODE_DATATYPE_MISMATCH),
354  errmsg("could not determine actual result type for function \"%s\" declared to return type %s",
355  NameStr(procform->proname),
356  format_type_be(rettype))));
357  rettype = newrettype;
358  }
359 
360  if (resultTypeId)
361  *resultTypeId = rettype;
362  if (resultTupleDesc)
363  *resultTupleDesc = NULL; /* default result */
364 
365  /* Classify the result type */
366  result = get_type_func_class(rettype);
367  switch (result)
368  {
369  case TYPEFUNC_COMPOSITE:
370  if (resultTupleDesc)
371  *resultTupleDesc = lookup_rowtype_tupdesc_copy(rettype, -1);
372  /* Named composite types can't have any polymorphic columns */
373  break;
374  case TYPEFUNC_SCALAR:
375  break;
376  case TYPEFUNC_RECORD:
377  /* We must get the tupledesc from call context */
378  if (rsinfo && IsA(rsinfo, ReturnSetInfo) &&
379  rsinfo->expectedDesc != NULL)
380  {
381  result = TYPEFUNC_COMPOSITE;
382  if (resultTupleDesc)
383  *resultTupleDesc = rsinfo->expectedDesc;
384  /* Assume no polymorphic columns here, either */
385  }
386  break;
387  default:
388  break;
389  }
390 
391  ReleaseSysCache(tp);
392 
393  return result;
394 }
395 
396 /*
397  * Given the result tuple descriptor for a function with OUT parameters,
398  * replace any polymorphic columns (ANYELEMENT etc) with correct data types
399  * deduced from the input arguments. Returns TRUE if able to deduce all types,
400  * FALSE if not.
401  */
402 static bool
404  Node *call_expr)
405 {
406  int natts = tupdesc->natts;
407  int nargs = declared_args->dim1;
408  bool have_anyelement_result = false;
409  bool have_anyarray_result = false;
410  bool have_anyrange_result = false;
411  bool have_anynonarray = false;
412  bool have_anyenum = false;
413  Oid anyelement_type = InvalidOid;
414  Oid anyarray_type = InvalidOid;
415  Oid anyrange_type = InvalidOid;
416  Oid anycollation = InvalidOid;
417  int i;
418 
419  /* See if there are any polymorphic outputs; quick out if not */
420  for (i = 0; i < natts; i++)
421  {
422  switch (TupleDescAttr(tupdesc, i)->atttypid)
423  {
424  case ANYELEMENTOID:
425  have_anyelement_result = true;
426  break;
427  case ANYARRAYOID:
428  have_anyarray_result = true;
429  break;
430  case ANYNONARRAYOID:
431  have_anyelement_result = true;
432  have_anynonarray = true;
433  break;
434  case ANYENUMOID:
435  have_anyelement_result = true;
436  have_anyenum = true;
437  break;
438  case ANYRANGEOID:
439  have_anyrange_result = true;
440  break;
441  default:
442  break;
443  }
444  }
445  if (!have_anyelement_result && !have_anyarray_result &&
446  !have_anyrange_result)
447  return true;
448 
449  /*
450  * Otherwise, extract actual datatype(s) from input arguments. (We assume
451  * the parser already validated consistency of the arguments.)
452  */
453  if (!call_expr)
454  return false; /* no hope */
455 
456  for (i = 0; i < nargs; i++)
457  {
458  switch (declared_args->values[i])
459  {
460  case ANYELEMENTOID:
461  case ANYNONARRAYOID:
462  case ANYENUMOID:
463  if (!OidIsValid(anyelement_type))
464  anyelement_type = get_call_expr_argtype(call_expr, i);
465  break;
466  case ANYARRAYOID:
467  if (!OidIsValid(anyarray_type))
468  anyarray_type = get_call_expr_argtype(call_expr, i);
469  break;
470  case ANYRANGEOID:
471  if (!OidIsValid(anyrange_type))
472  anyrange_type = get_call_expr_argtype(call_expr, i);
473  break;
474  default:
475  break;
476  }
477  }
478 
479  /* If nothing found, parser messed up */
480  if (!OidIsValid(anyelement_type) && !OidIsValid(anyarray_type) &&
481  !OidIsValid(anyrange_type))
482  return false;
483 
484  /* If needed, deduce one polymorphic type from others */
485  if (have_anyelement_result && !OidIsValid(anyelement_type))
486  {
487  if (OidIsValid(anyarray_type))
488  anyelement_type = resolve_generic_type(ANYELEMENTOID,
489  anyarray_type,
490  ANYARRAYOID);
491  if (OidIsValid(anyrange_type))
492  {
494  anyrange_type,
495  ANYRANGEOID);
496 
497  /* check for inconsistent array and range results */
498  if (OidIsValid(anyelement_type) && anyelement_type != subtype)
499  return false;
500  anyelement_type = subtype;
501  }
502  }
503 
504  if (have_anyarray_result && !OidIsValid(anyarray_type))
505  anyarray_type = resolve_generic_type(ANYARRAYOID,
506  anyelement_type,
507  ANYELEMENTOID);
508 
509  /*
510  * We can't deduce a range type from other polymorphic inputs, because
511  * there may be multiple range types for the same subtype.
512  */
513  if (have_anyrange_result && !OidIsValid(anyrange_type))
514  return false;
515 
516  /* Enforce ANYNONARRAY if needed */
517  if (have_anynonarray && type_is_array(anyelement_type))
518  return false;
519 
520  /* Enforce ANYENUM if needed */
521  if (have_anyenum && !type_is_enum(anyelement_type))
522  return false;
523 
524  /*
525  * Identify the collation to use for polymorphic OUT parameters. (It'll
526  * necessarily be the same for both anyelement and anyarray.) Note that
527  * range types are not collatable, so any possible internal collation of a
528  * range type is not considered here.
529  */
530  if (OidIsValid(anyelement_type))
531  anycollation = get_typcollation(anyelement_type);
532  else if (OidIsValid(anyarray_type))
533  anycollation = get_typcollation(anyarray_type);
534 
535  if (OidIsValid(anycollation))
536  {
537  /*
538  * The types are collatable, so consider whether to use a nondefault
539  * collation. We do so if we can identify the input collation used
540  * for the function.
541  */
542  Oid inputcollation = exprInputCollation(call_expr);
543 
544  if (OidIsValid(inputcollation))
545  anycollation = inputcollation;
546  }
547 
548  /* And finally replace the tuple column types as needed */
549  for (i = 0; i < natts; i++)
550  {
551  Form_pg_attribute att = TupleDescAttr(tupdesc, i);
552 
553  switch (att->atttypid)
554  {
555  case ANYELEMENTOID:
556  case ANYNONARRAYOID:
557  case ANYENUMOID:
558  TupleDescInitEntry(tupdesc, i + 1,
559  NameStr(att->attname),
560  anyelement_type,
561  -1,
562  0);
563  TupleDescInitEntryCollation(tupdesc, i + 1, anycollation);
564  break;
565  case ANYARRAYOID:
566  TupleDescInitEntry(tupdesc, i + 1,
567  NameStr(att->attname),
568  anyarray_type,
569  -1,
570  0);
571  TupleDescInitEntryCollation(tupdesc, i + 1, anycollation);
572  break;
573  case ANYRANGEOID:
574  TupleDescInitEntry(tupdesc, i + 1,
575  NameStr(att->attname),
576  anyrange_type,
577  -1,
578  0);
579  /* no collation should be attached to a range type */
580  break;
581  default:
582  break;
583  }
584  }
585 
586  return true;
587 }
588 
589 /*
590  * Given the declared argument types and modes for a function, replace any
591  * polymorphic types (ANYELEMENT etc) with correct data types deduced from the
592  * input arguments. Returns TRUE if able to deduce all types, FALSE if not.
593  * This is the same logic as resolve_polymorphic_tupdesc, but with a different
594  * argument representation.
595  *
596  * argmodes may be NULL, in which case all arguments are assumed to be IN mode.
597  */
598 bool
599 resolve_polymorphic_argtypes(int numargs, Oid *argtypes, char *argmodes,
600  Node *call_expr)
601 {
602  bool have_anyelement_result = false;
603  bool have_anyarray_result = false;
604  bool have_anyrange_result = false;
605  Oid anyelement_type = InvalidOid;
606  Oid anyarray_type = InvalidOid;
607  Oid anyrange_type = InvalidOid;
608  int inargno;
609  int i;
610 
611  /* First pass: resolve polymorphic inputs, check for outputs */
612  inargno = 0;
613  for (i = 0; i < numargs; i++)
614  {
615  char argmode = argmodes ? argmodes[i] : PROARGMODE_IN;
616 
617  switch (argtypes[i])
618  {
619  case ANYELEMENTOID:
620  case ANYNONARRAYOID:
621  case ANYENUMOID:
622  if (argmode == PROARGMODE_OUT || argmode == PROARGMODE_TABLE)
623  have_anyelement_result = true;
624  else
625  {
626  if (!OidIsValid(anyelement_type))
627  {
628  anyelement_type = get_call_expr_argtype(call_expr,
629  inargno);
630  if (!OidIsValid(anyelement_type))
631  return false;
632  }
633  argtypes[i] = anyelement_type;
634  }
635  break;
636  case ANYARRAYOID:
637  if (argmode == PROARGMODE_OUT || argmode == PROARGMODE_TABLE)
638  have_anyarray_result = true;
639  else
640  {
641  if (!OidIsValid(anyarray_type))
642  {
643  anyarray_type = get_call_expr_argtype(call_expr,
644  inargno);
645  if (!OidIsValid(anyarray_type))
646  return false;
647  }
648  argtypes[i] = anyarray_type;
649  }
650  break;
651  case ANYRANGEOID:
652  if (argmode == PROARGMODE_OUT || argmode == PROARGMODE_TABLE)
653  have_anyrange_result = true;
654  else
655  {
656  if (!OidIsValid(anyrange_type))
657  {
658  anyrange_type = get_call_expr_argtype(call_expr,
659  inargno);
660  if (!OidIsValid(anyrange_type))
661  return false;
662  }
663  argtypes[i] = anyrange_type;
664  }
665  break;
666  default:
667  break;
668  }
669  if (argmode != PROARGMODE_OUT && argmode != PROARGMODE_TABLE)
670  inargno++;
671  }
672 
673  /* Done? */
674  if (!have_anyelement_result && !have_anyarray_result &&
675  !have_anyrange_result)
676  return true;
677 
678  /* If no input polymorphics, parser messed up */
679  if (!OidIsValid(anyelement_type) && !OidIsValid(anyarray_type) &&
680  !OidIsValid(anyrange_type))
681  return false;
682 
683  /* If needed, deduce one polymorphic type from others */
684  if (have_anyelement_result && !OidIsValid(anyelement_type))
685  {
686  if (OidIsValid(anyarray_type))
687  anyelement_type = resolve_generic_type(ANYELEMENTOID,
688  anyarray_type,
689  ANYARRAYOID);
690  if (OidIsValid(anyrange_type))
691  {
693  anyrange_type,
694  ANYRANGEOID);
695 
696  /* check for inconsistent array and range results */
697  if (OidIsValid(anyelement_type) && anyelement_type != subtype)
698  return false;
699  anyelement_type = subtype;
700  }
701  }
702 
703  if (have_anyarray_result && !OidIsValid(anyarray_type))
704  anyarray_type = resolve_generic_type(ANYARRAYOID,
705  anyelement_type,
706  ANYELEMENTOID);
707 
708  /*
709  * We can't deduce a range type from other polymorphic inputs, because
710  * there may be multiple range types for the same subtype.
711  */
712  if (have_anyrange_result && !OidIsValid(anyrange_type))
713  return false;
714 
715  /* XXX do we need to enforce ANYNONARRAY or ANYENUM here? I think not */
716 
717  /* And finally replace the output column types as needed */
718  for (i = 0; i < numargs; i++)
719  {
720  switch (argtypes[i])
721  {
722  case ANYELEMENTOID:
723  case ANYNONARRAYOID:
724  case ANYENUMOID:
725  argtypes[i] = anyelement_type;
726  break;
727  case ANYARRAYOID:
728  argtypes[i] = anyarray_type;
729  break;
730  case ANYRANGEOID:
731  argtypes[i] = anyrange_type;
732  break;
733  default:
734  break;
735  }
736  }
737 
738  return true;
739 }
740 
741 /*
742  * get_type_func_class
743  * Given the type OID, obtain its TYPEFUNC classification.
744  *
745  * This is intended to centralize a bunch of formerly ad-hoc code for
746  * classifying types. The categories used here are useful for deciding
747  * how to handle functions returning the datatype.
748  */
749 static TypeFuncClass
751 {
752  switch (get_typtype(typid))
753  {
754  case TYPTYPE_COMPOSITE:
755  return TYPEFUNC_COMPOSITE;
756  case TYPTYPE_BASE:
757  case TYPTYPE_DOMAIN:
758  case TYPTYPE_ENUM:
759  case TYPTYPE_RANGE:
760  return TYPEFUNC_SCALAR;
761  case TYPTYPE_PSEUDO:
762  if (typid == RECORDOID)
763  return TYPEFUNC_RECORD;
764 
765  /*
766  * We treat VOID and CSTRING as legitimate scalar datatypes,
767  * mostly for the convenience of the JDBC driver (which wants to
768  * be able to do "SELECT * FROM foo()" for all legitimately
769  * user-callable functions).
770  */
771  if (typid == VOIDOID || typid == CSTRINGOID)
772  return TYPEFUNC_SCALAR;
773  return TYPEFUNC_OTHER;
774  }
775  /* shouldn't get here, probably */
776  return TYPEFUNC_OTHER;
777 }
778 
779 
780 /*
781  * get_func_arg_info
782  *
783  * Fetch info about the argument types, names, and IN/OUT modes from the
784  * pg_proc tuple. Return value is the total number of arguments.
785  * Other results are palloc'd. *p_argtypes is always filled in, but
786  * *p_argnames and *p_argmodes will be set NULL in the default cases
787  * (no names, and all IN arguments, respectively).
788  *
789  * Note that this function simply fetches what is in the pg_proc tuple;
790  * it doesn't do any interpretation of polymorphic types.
791  */
792 int
794  Oid **p_argtypes, char ***p_argnames, char **p_argmodes)
795 {
796  Form_pg_proc procStruct = (Form_pg_proc) GETSTRUCT(procTup);
797  Datum proallargtypes;
798  Datum proargmodes;
799  Datum proargnames;
800  bool isNull;
801  ArrayType *arr;
802  int numargs;
803  Datum *elems;
804  int nelems;
805  int i;
806 
807  /* First discover the total number of parameters and get their types */
808  proallargtypes = SysCacheGetAttr(PROCOID, procTup,
810  &isNull);
811  if (!isNull)
812  {
813  /*
814  * We expect the arrays to be 1-D arrays of the right types; verify
815  * that. For the OID and char arrays, we don't need to use
816  * deconstruct_array() since the array data is just going to look like
817  * a C array of values.
818  */
819  arr = DatumGetArrayTypeP(proallargtypes); /* ensure not toasted */
820  numargs = ARR_DIMS(arr)[0];
821  if (ARR_NDIM(arr) != 1 ||
822  numargs < 0 ||
823  ARR_HASNULL(arr) ||
824  ARR_ELEMTYPE(arr) != OIDOID)
825  elog(ERROR, "proallargtypes is not a 1-D Oid array");
826  Assert(numargs >= procStruct->pronargs);
827  *p_argtypes = (Oid *) palloc(numargs * sizeof(Oid));
828  memcpy(*p_argtypes, ARR_DATA_PTR(arr),
829  numargs * sizeof(Oid));
830  }
831  else
832  {
833  /* If no proallargtypes, use proargtypes */
834  numargs = procStruct->proargtypes.dim1;
835  Assert(numargs == procStruct->pronargs);
836  *p_argtypes = (Oid *) palloc(numargs * sizeof(Oid));
837  memcpy(*p_argtypes, procStruct->proargtypes.values,
838  numargs * sizeof(Oid));
839  }
840 
841  /* Get argument names, if available */
842  proargnames = SysCacheGetAttr(PROCOID, procTup,
844  &isNull);
845  if (isNull)
846  *p_argnames = NULL;
847  else
848  {
850  TEXTOID, -1, false, 'i',
851  &elems, NULL, &nelems);
852  if (nelems != numargs) /* should not happen */
853  elog(ERROR, "proargnames must have the same number of elements as the function has arguments");
854  *p_argnames = (char **) palloc(sizeof(char *) * numargs);
855  for (i = 0; i < numargs; i++)
856  (*p_argnames)[i] = TextDatumGetCString(elems[i]);
857  }
858 
859  /* Get argument modes, if available */
860  proargmodes = SysCacheGetAttr(PROCOID, procTup,
862  &isNull);
863  if (isNull)
864  *p_argmodes = NULL;
865  else
866  {
867  arr = DatumGetArrayTypeP(proargmodes); /* ensure not toasted */
868  if (ARR_NDIM(arr) != 1 ||
869  ARR_DIMS(arr)[0] != numargs ||
870  ARR_HASNULL(arr) ||
871  ARR_ELEMTYPE(arr) != CHAROID)
872  elog(ERROR, "proargmodes is not a 1-D char array");
873  *p_argmodes = (char *) palloc(numargs * sizeof(char));
874  memcpy(*p_argmodes, ARR_DATA_PTR(arr),
875  numargs * sizeof(char));
876  }
877 
878  return numargs;
879 }
880 
881 /*
882  * get_func_trftypes
883  *
884  * Returns the number of transformed types used by function.
885  */
886 int
888  Oid **p_trftypes)
889 {
890  Datum protrftypes;
891  ArrayType *arr;
892  int nelems;
893  bool isNull;
894 
895  protrftypes = SysCacheGetAttr(PROCOID, procTup,
897  &isNull);
898  if (!isNull)
899  {
900  /*
901  * We expect the arrays to be 1-D arrays of the right types; verify
902  * that. For the OID and char arrays, we don't need to use
903  * deconstruct_array() since the array data is just going to look like
904  * a C array of values.
905  */
906  arr = DatumGetArrayTypeP(protrftypes); /* ensure not toasted */
907  nelems = ARR_DIMS(arr)[0];
908  if (ARR_NDIM(arr) != 1 ||
909  nelems < 0 ||
910  ARR_HASNULL(arr) ||
911  ARR_ELEMTYPE(arr) != OIDOID)
912  elog(ERROR, "protrftypes is not a 1-D Oid array");
913  Assert(nelems >= ((Form_pg_proc) GETSTRUCT(procTup))->pronargs);
914  *p_trftypes = (Oid *) palloc(nelems * sizeof(Oid));
915  memcpy(*p_trftypes, ARR_DATA_PTR(arr),
916  nelems * sizeof(Oid));
917 
918  return nelems;
919  }
920  else
921  return 0;
922 }
923 
924 /*
925  * get_func_input_arg_names
926  *
927  * Extract the names of input arguments only, given a function's
928  * proargnames and proargmodes entries in Datum form.
929  *
930  * Returns the number of input arguments, which is the length of the
931  * palloc'd array returned to *arg_names. Entries for unnamed args
932  * are set to NULL. You don't get anything if proargnames is NULL.
933  */
934 int
935 get_func_input_arg_names(Datum proargnames, Datum proargmodes,
936  char ***arg_names)
937 {
938  ArrayType *arr;
939  int numargs;
940  Datum *argnames;
941  char *argmodes;
942  char **inargnames;
943  int numinargs;
944  int i;
945 
946  /* Do nothing if null proargnames */
947  if (proargnames == PointerGetDatum(NULL))
948  {
949  *arg_names = NULL;
950  return 0;
951  }
952 
953  /*
954  * We expect the arrays to be 1-D arrays of the right types; verify that.
955  * For proargmodes, we don't need to use deconstruct_array() since the
956  * array data is just going to look like a C array of values.
957  */
958  arr = DatumGetArrayTypeP(proargnames); /* ensure not toasted */
959  if (ARR_NDIM(arr) != 1 ||
960  ARR_HASNULL(arr) ||
961  ARR_ELEMTYPE(arr) != TEXTOID)
962  elog(ERROR, "proargnames is not a 1-D text array");
963  deconstruct_array(arr, TEXTOID, -1, false, 'i',
964  &argnames, NULL, &numargs);
965  if (proargmodes != PointerGetDatum(NULL))
966  {
967  arr = DatumGetArrayTypeP(proargmodes); /* ensure not toasted */
968  if (ARR_NDIM(arr) != 1 ||
969  ARR_DIMS(arr)[0] != numargs ||
970  ARR_HASNULL(arr) ||
971  ARR_ELEMTYPE(arr) != CHAROID)
972  elog(ERROR, "proargmodes is not a 1-D char array");
973  argmodes = (char *) ARR_DATA_PTR(arr);
974  }
975  else
976  argmodes = NULL;
977 
978  /* zero elements probably shouldn't happen, but handle it gracefully */
979  if (numargs <= 0)
980  {
981  *arg_names = NULL;
982  return 0;
983  }
984 
985  /* extract input-argument names */
986  inargnames = (char **) palloc(numargs * sizeof(char *));
987  numinargs = 0;
988  for (i = 0; i < numargs; i++)
989  {
990  if (argmodes == NULL ||
991  argmodes[i] == PROARGMODE_IN ||
992  argmodes[i] == PROARGMODE_INOUT ||
993  argmodes[i] == PROARGMODE_VARIADIC)
994  {
995  char *pname = TextDatumGetCString(argnames[i]);
996 
997  if (pname[0] != '\0')
998  inargnames[numinargs] = pname;
999  else
1000  inargnames[numinargs] = NULL;
1001  numinargs++;
1002  }
1003  }
1004 
1005  *arg_names = inargnames;
1006  return numinargs;
1007 }
1008 
1009 
1010 /*
1011  * get_func_result_name
1012  *
1013  * If the function has exactly one output parameter, and that parameter
1014  * is named, return the name (as a palloc'd string). Else return NULL.
1015  *
1016  * This is used to determine the default output column name for functions
1017  * returning scalar types.
1018  */
1019 char *
1021 {
1022  char *result;
1023  HeapTuple procTuple;
1024  Datum proargmodes;
1025  Datum proargnames;
1026  bool isnull;
1027  ArrayType *arr;
1028  int numargs;
1029  char *argmodes;
1030  Datum *argnames;
1031  int numoutargs;
1032  int nargnames;
1033  int i;
1034 
1035  /* First fetch the function's pg_proc row */
1036  procTuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(functionId));
1037  if (!HeapTupleIsValid(procTuple))
1038  elog(ERROR, "cache lookup failed for function %u", functionId);
1039 
1040  /* If there are no named OUT parameters, return NULL */
1041  if (heap_attisnull(procTuple, Anum_pg_proc_proargmodes) ||
1043  result = NULL;
1044  else
1045  {
1046  /* Get the data out of the tuple */
1047  proargmodes = SysCacheGetAttr(PROCOID, procTuple,
1049  &isnull);
1050  Assert(!isnull);
1051  proargnames = SysCacheGetAttr(PROCOID, procTuple,
1053  &isnull);
1054  Assert(!isnull);
1055 
1056  /*
1057  * We expect the arrays to be 1-D arrays of the right types; verify
1058  * that. For the char array, we don't need to use deconstruct_array()
1059  * since the array data is just going to look like a C array of
1060  * values.
1061  */
1062  arr = DatumGetArrayTypeP(proargmodes); /* ensure not toasted */
1063  numargs = ARR_DIMS(arr)[0];
1064  if (ARR_NDIM(arr) != 1 ||
1065  numargs < 0 ||
1066  ARR_HASNULL(arr) ||
1067  ARR_ELEMTYPE(arr) != CHAROID)
1068  elog(ERROR, "proargmodes is not a 1-D char array");
1069  argmodes = (char *) ARR_DATA_PTR(arr);
1070  arr = DatumGetArrayTypeP(proargnames); /* ensure not toasted */
1071  if (ARR_NDIM(arr) != 1 ||
1072  ARR_DIMS(arr)[0] != numargs ||
1073  ARR_HASNULL(arr) ||
1074  ARR_ELEMTYPE(arr) != TEXTOID)
1075  elog(ERROR, "proargnames is not a 1-D text array");
1076  deconstruct_array(arr, TEXTOID, -1, false, 'i',
1077  &argnames, NULL, &nargnames);
1078  Assert(nargnames == numargs);
1079 
1080  /* scan for output argument(s) */
1081  result = NULL;
1082  numoutargs = 0;
1083  for (i = 0; i < numargs; i++)
1084  {
1085  if (argmodes[i] == PROARGMODE_IN ||
1086  argmodes[i] == PROARGMODE_VARIADIC)
1087  continue;
1088  Assert(argmodes[i] == PROARGMODE_OUT ||
1089  argmodes[i] == PROARGMODE_INOUT ||
1090  argmodes[i] == PROARGMODE_TABLE);
1091  if (++numoutargs > 1)
1092  {
1093  /* multiple out args, so forget it */
1094  result = NULL;
1095  break;
1096  }
1097  result = TextDatumGetCString(argnames[i]);
1098  if (result == NULL || result[0] == '\0')
1099  {
1100  /* Parameter is not named, so forget it */
1101  result = NULL;
1102  break;
1103  }
1104  }
1105  }
1106 
1107  ReleaseSysCache(procTuple);
1108 
1109  return result;
1110 }
1111 
1112 
1113 /*
1114  * build_function_result_tupdesc_t
1115  *
1116  * Given a pg_proc row for a function, return a tuple descriptor for the
1117  * result rowtype, or NULL if the function does not have OUT parameters.
1118  *
1119  * Note that this does not handle resolution of polymorphic types;
1120  * that is deliberate.
1121  */
1122 TupleDesc
1124 {
1125  Form_pg_proc procform = (Form_pg_proc) GETSTRUCT(procTuple);
1126  Datum proallargtypes;
1127  Datum proargmodes;
1128  Datum proargnames;
1129  bool isnull;
1130 
1131  /* Return NULL if the function isn't declared to return RECORD */
1132  if (procform->prorettype != RECORDOID)
1133  return NULL;
1134 
1135  /* If there are no OUT parameters, return NULL */
1136  if (heap_attisnull(procTuple, Anum_pg_proc_proallargtypes) ||
1138  return NULL;
1139 
1140  /* Get the data out of the tuple */
1141  proallargtypes = SysCacheGetAttr(PROCOID, procTuple,
1143  &isnull);
1144  Assert(!isnull);
1145  proargmodes = SysCacheGetAttr(PROCOID, procTuple,
1147  &isnull);
1148  Assert(!isnull);
1149  proargnames = SysCacheGetAttr(PROCOID, procTuple,
1151  &isnull);
1152  if (isnull)
1153  proargnames = PointerGetDatum(NULL); /* just to be sure */
1154 
1155  return build_function_result_tupdesc_d(proallargtypes,
1156  proargmodes,
1157  proargnames);
1158 }
1159 
1160 /*
1161  * build_function_result_tupdesc_d
1162  *
1163  * Build a RECORD function's tupledesc from the pg_proc proallargtypes,
1164  * proargmodes, and proargnames arrays. This is split out for the
1165  * convenience of ProcedureCreate, which needs to be able to compute the
1166  * tupledesc before actually creating the function.
1167  *
1168  * Returns NULL if there are not at least two OUT or INOUT arguments.
1169  */
1170 TupleDesc
1172  Datum proargmodes,
1173  Datum proargnames)
1174 {
1175  TupleDesc desc;
1176  ArrayType *arr;
1177  int numargs;
1178  Oid *argtypes;
1179  char *argmodes;
1180  Datum *argnames = NULL;
1181  Oid *outargtypes;
1182  char **outargnames;
1183  int numoutargs;
1184  int nargnames;
1185  int i;
1186 
1187  /* Can't have output args if columns are null */
1188  if (proallargtypes == PointerGetDatum(NULL) ||
1189  proargmodes == PointerGetDatum(NULL))
1190  return NULL;
1191 
1192  /*
1193  * We expect the arrays to be 1-D arrays of the right types; verify that.
1194  * For the OID and char arrays, we don't need to use deconstruct_array()
1195  * since the array data is just going to look like a C array of values.
1196  */
1197  arr = DatumGetArrayTypeP(proallargtypes); /* ensure not toasted */
1198  numargs = ARR_DIMS(arr)[0];
1199  if (ARR_NDIM(arr) != 1 ||
1200  numargs < 0 ||
1201  ARR_HASNULL(arr) ||
1202  ARR_ELEMTYPE(arr) != OIDOID)
1203  elog(ERROR, "proallargtypes is not a 1-D Oid array");
1204  argtypes = (Oid *) ARR_DATA_PTR(arr);
1205  arr = DatumGetArrayTypeP(proargmodes); /* ensure not toasted */
1206  if (ARR_NDIM(arr) != 1 ||
1207  ARR_DIMS(arr)[0] != numargs ||
1208  ARR_HASNULL(arr) ||
1209  ARR_ELEMTYPE(arr) != CHAROID)
1210  elog(ERROR, "proargmodes is not a 1-D char array");
1211  argmodes = (char *) ARR_DATA_PTR(arr);
1212  if (proargnames != PointerGetDatum(NULL))
1213  {
1214  arr = DatumGetArrayTypeP(proargnames); /* ensure not toasted */
1215  if (ARR_NDIM(arr) != 1 ||
1216  ARR_DIMS(arr)[0] != numargs ||
1217  ARR_HASNULL(arr) ||
1218  ARR_ELEMTYPE(arr) != TEXTOID)
1219  elog(ERROR, "proargnames is not a 1-D text array");
1220  deconstruct_array(arr, TEXTOID, -1, false, 'i',
1221  &argnames, NULL, &nargnames);
1222  Assert(nargnames == numargs);
1223  }
1224 
1225  /* zero elements probably shouldn't happen, but handle it gracefully */
1226  if (numargs <= 0)
1227  return NULL;
1228 
1229  /* extract output-argument types and names */
1230  outargtypes = (Oid *) palloc(numargs * sizeof(Oid));
1231  outargnames = (char **) palloc(numargs * sizeof(char *));
1232  numoutargs = 0;
1233  for (i = 0; i < numargs; i++)
1234  {
1235  char *pname;
1236 
1237  if (argmodes[i] == PROARGMODE_IN ||
1238  argmodes[i] == PROARGMODE_VARIADIC)
1239  continue;
1240  Assert(argmodes[i] == PROARGMODE_OUT ||
1241  argmodes[i] == PROARGMODE_INOUT ||
1242  argmodes[i] == PROARGMODE_TABLE);
1243  outargtypes[numoutargs] = argtypes[i];
1244  if (argnames)
1245  pname = TextDatumGetCString(argnames[i]);
1246  else
1247  pname = NULL;
1248  if (pname == NULL || pname[0] == '\0')
1249  {
1250  /* Parameter is not named, so gin up a column name */
1251  pname = psprintf("column%d", numoutargs + 1);
1252  }
1253  outargnames[numoutargs] = pname;
1254  numoutargs++;
1255  }
1256 
1257  /*
1258  * If there is no output argument, or only one, the function does not
1259  * return tuples.
1260  */
1261  if (numoutargs < 2)
1262  return NULL;
1263 
1264  desc = CreateTemplateTupleDesc(numoutargs, false);
1265  for (i = 0; i < numoutargs; i++)
1266  {
1267  TupleDescInitEntry(desc, i + 1,
1268  outargnames[i],
1269  outargtypes[i],
1270  -1,
1271  0);
1272  }
1273 
1274  return desc;
1275 }
1276 
1277 
1278 /*
1279  * RelationNameGetTupleDesc
1280  *
1281  * Given a (possibly qualified) relation name, build a TupleDesc.
1282  *
1283  * Note: while this works as advertised, it's seldom the best way to
1284  * build a tupdesc for a function's result type. It's kept around
1285  * only for backwards compatibility with existing user-written code.
1286  */
1287 TupleDesc
1288 RelationNameGetTupleDesc(const char *relname)
1289 {
1290  RangeVar *relvar;
1291  Relation rel;
1292  TupleDesc tupdesc;
1293  List *relname_list;
1294 
1295  /* Open relation and copy the tuple description */
1296  relname_list = stringToQualifiedNameList(relname);
1297  relvar = makeRangeVarFromNameList(relname_list);
1298  rel = relation_openrv(relvar, AccessShareLock);
1299  tupdesc = CreateTupleDescCopy(RelationGetDescr(rel));
1301 
1302  return tupdesc;
1303 }
1304 
1305 /*
1306  * TypeGetTupleDesc
1307  *
1308  * Given a type Oid, build a TupleDesc. (In most cases you should be
1309  * using get_call_result_type or one of its siblings instead of this
1310  * routine, so that you can handle OUT parameters, RECORD result type,
1311  * and polymorphic results.)
1312  *
1313  * If the type is composite, *and* a colaliases List is provided, *and*
1314  * the List is of natts length, use the aliases instead of the relation
1315  * attnames. (NB: this usage is deprecated since it may result in
1316  * creation of unnecessary transient record types.)
1317  *
1318  * If the type is a base type, a single item alias List is required.
1319  */
1320 TupleDesc
1321 TypeGetTupleDesc(Oid typeoid, List *colaliases)
1322 {
1323  TypeFuncClass functypclass = get_type_func_class(typeoid);
1324  TupleDesc tupdesc = NULL;
1325 
1326  /*
1327  * Build a suitable tupledesc representing the output rows
1328  */
1329  if (functypclass == TYPEFUNC_COMPOSITE)
1330  {
1331  /* Composite data type, e.g. a table's row type */
1332  tupdesc = lookup_rowtype_tupdesc_copy(typeoid, -1);
1333 
1334  if (colaliases != NIL)
1335  {
1336  int natts = tupdesc->natts;
1337  int varattno;
1338 
1339  /* does the list length match the number of attributes? */
1340  if (list_length(colaliases) != natts)
1341  ereport(ERROR,
1342  (errcode(ERRCODE_DATATYPE_MISMATCH),
1343  errmsg("number of aliases does not match number of columns")));
1344 
1345  /* OK, use the aliases instead */
1346  for (varattno = 0; varattno < natts; varattno++)
1347  {
1348  char *label = strVal(list_nth(colaliases, varattno));
1349  Form_pg_attribute attr = TupleDescAttr(tupdesc, varattno);
1350 
1351  if (label != NULL)
1352  namestrcpy(&(attr->attname), label);
1353  }
1354 
1355  /* The tuple type is now an anonymous record type */
1356  tupdesc->tdtypeid = RECORDOID;
1357  tupdesc->tdtypmod = -1;
1358  }
1359  }
1360  else if (functypclass == TYPEFUNC_SCALAR)
1361  {
1362  /* Base data type, i.e. scalar */
1363  char *attname;
1364 
1365  /* the alias list is required for base types */
1366  if (colaliases == NIL)
1367  ereport(ERROR,
1368  (errcode(ERRCODE_DATATYPE_MISMATCH),
1369  errmsg("no column alias was provided")));
1370 
1371  /* the alias list length must be 1 */
1372  if (list_length(colaliases) != 1)
1373  ereport(ERROR,
1374  (errcode(ERRCODE_DATATYPE_MISMATCH),
1375  errmsg("number of aliases does not match number of columns")));
1376 
1377  /* OK, get the column alias */
1378  attname = strVal(linitial(colaliases));
1379 
1380  tupdesc = CreateTemplateTupleDesc(1, false);
1381  TupleDescInitEntry(tupdesc,
1382  (AttrNumber) 1,
1383  attname,
1384  typeoid,
1385  -1,
1386  0);
1387  }
1388  else if (functypclass == TYPEFUNC_RECORD)
1389  {
1390  /* XXX can't support this because typmod wasn't passed in ... */
1391  ereport(ERROR,
1392  (errcode(ERRCODE_DATATYPE_MISMATCH),
1393  errmsg("could not determine row description for function returning record")));
1394  }
1395  else
1396  {
1397  /* crummy error message, but parser should have caught this */
1398  elog(ERROR, "function in FROM has unsupported return type");
1399  }
1400 
1401  return tupdesc;
1402 }
bool resolve_polymorphic_argtypes(int numargs, Oid *argtypes, char *argmodes, Node *call_expr)
Definition: funcapi.c:599
uint64 call_cntr
Definition: funcapi.h:65
#define ANYNONARRAYOID
Definition: pg_type.h:704
#define NIL
Definition: pg_list.h:69
Definition: c.h:472
#define TYPTYPE_DOMAIN
Definition: pg_type.h:722
Relation relation_openrv(const RangeVar *relation, LOCKMODE lockmode)
Definition: heapam.c:1198
Definition: fmgr.h:56
TupleDesc CreateTupleDescCopy(TupleDesc tupdesc)
Definition: tupdesc.c:102
#define IsA(nodeptr, _type_)
Definition: nodes.h:561
void MemoryContextDelete(MemoryContext context)
Definition: mcxt.c:200
TupleTableSlot * slot
Definition: funcapi.h:82
Oid tdtypeid
Definition: tupdesc.h:74
TypeFuncClass get_call_result_type(FunctionCallInfo fcinfo, Oid *resultTypeId, TupleDesc *resultTupleDesc)
Definition: funcapi.c:211
#define GETSTRUCT(TUP)
Definition: htup_details.h:656
Oid resolve_generic_type(Oid declared_type, Oid context_actual_type, Oid context_declared_type)
#define TYPTYPE_BASE
Definition: pg_type.h:720
#define RelationGetDescr(relation)
Definition: rel.h:428
#define TYPTYPE_COMPOSITE
Definition: pg_type.h:721
#define OIDOID
Definition: pg_type.h:328
#define TEXTOID
Definition: pg_type.h:324
void UnregisterExprContextCallback(ExprContext *econtext, ExprContextCallbackFunction function, Datum arg)
Definition: execUtils.c:763
#define PointerGetDatum(X)
Definition: postgres.h:562
#define TupleDescAttr(tupdesc, i)
Definition: tupdesc.h:84
#define ANYELEMENTOID
Definition: pg_type.h:702
char * psprintf(const char *fmt,...)
Definition: psprintf.c:46
#define ALLOCSET_SMALL_SIZES
Definition: memutils.h:175
TupleDesc build_function_result_tupdesc_d(Datum proallargtypes, Datum proargmodes, Datum proargnames)
Definition: funcapi.c:1171
TupleTableSlot * ExecClearTuple(TupleTableSlot *slot)
Definition: execTuples.c:439
int get_func_arg_info(HeapTuple procTup, Oid **p_argtypes, char ***p_argnames, char **p_argmodes)
Definition: funcapi.c:793
#define AccessShareLock
Definition: lockdefs.h:36
Definition: nodes.h:510
#define strVal(v)
Definition: value.h:54
int errcode(int sqlerrcode)
Definition: elog.c:575
char get_typtype(Oid typid)
Definition: lsyscache.c:2379
void relation_close(Relation relation, LOCKMODE lockmode)
Definition: heapam.c:1266
Oid get_call_expr_argtype(Node *expr, int argnum)
Definition: fmgr.c:1923
char * format_type_be(Oid type_oid)
Definition: format_type.c:94
#define Anum_pg_proc_protrftypes
Definition: pg_proc.h:114
RangeVar * makeRangeVarFromNameList(List *names)
Definition: namespace.c:3023
#define PROARGMODE_VARIADIC
Definition: pg_proc.h:5554
unsigned int Oid
Definition: postgres_ext.h:31
int namestrcpy(Name name, const char *str)
Definition: name.c:216
TypeFuncClass get_expr_result_type(Node *expr, Oid *resultTypeId, TupleDesc *resultTupleDesc)
Definition: funcapi.c:227
#define OidIsValid(objectId)
Definition: c.h:532
int natts
Definition: tupdesc.h:73
#define PROARGMODE_INOUT
Definition: pg_proc.h:5553
int32 tdtypmod
Definition: tupdesc.h:75
static void shutdown_MultiFuncCall(Datum arg)
Definition: funcapi.c:173
#define PROARGMODE_OUT
Definition: pg_proc.h:5552
TupleDesc tuple_desc
Definition: funcapi.h:120
void assign_record_type_typmod(TupleDesc tupDesc)
Definition: typcache.c:1652
FmgrInfo * flinfo
Definition: fmgr.h:79
TupleDesc expectedDesc
Definition: execnodes.h:267
TupleDesc build_function_result_tupdesc_t(HeapTuple procTuple)
Definition: funcapi.c:1123
#define linitial(l)
Definition: pg_list.h:111
#define VOIDOID
Definition: pg_type.h:690
#define ObjectIdGetDatum(X)
Definition: postgres.h:513
#define ERROR
Definition: elog.h:43
static TypeFuncClass get_type_func_class(Oid typid)
Definition: funcapi.c:750
#define IsPolymorphicType(typid)
Definition: pg_type.h:745
#define ANYRANGEOID
Definition: pg_type.h:714
#define ARR_DIMS(a)
Definition: array.h:279
#define PROARGMODE_TABLE
Definition: pg_proc.h:5555
void TupleDescInitEntryCollation(TupleDesc desc, AttrNumber attributeNumber, Oid collationid)
Definition: tupdesc.c:664
#define ARR_DATA_PTR(a)
Definition: array.h:307
void * list_nth(const List *list, int n)
Definition: list.c:410
#define ANYENUMOID
Definition: pg_type.h:706
Oid values[FLEXIBLE_ARRAY_MEMBER]
Definition: c.h:480
bool heap_attisnull(HeapTuple tup, int attnum)
Definition: heaptuple.c:296
int dim1
Definition: c.h:478
AttInMetadata * attinmeta
Definition: funcapi.h:99
fmNodePtr resultinfo
Definition: fmgr.h:81
FormData_pg_attribute * Form_pg_attribute
Definition: pg_attribute.h:187
#define ARR_HASNULL(a)
Definition: array.h:276
#define Anum_pg_proc_proargmodes
Definition: pg_proc.h:111
#define RECORDOID
Definition: pg_type.h:680
TypeFuncClass
Definition: funcapi.h:150
int get_func_trftypes(HeapTuple procTup, Oid **p_trftypes)
Definition: funcapi.c:887
void TupleDescInitEntry(TupleDesc desc, AttrNumber attributeNumber, const char *attributeName, Oid oidtypeid, int32 typmod, int attdim)
Definition: tupdesc.c:505
#define ereport(elevel, rest)
Definition: elog.h:122
#define PROARGMODE_IN
Definition: pg_proc.h:5551
TypeFuncClass get_func_result_type(Oid functionId, Oid *resultTypeId, TupleDesc *resultTupleDesc)
Definition: funcapi.c:269
#define Anum_pg_proc_proargnames
Definition: pg_proc.h:112
#define TYPTYPE_RANGE
Definition: pg_type.h:725
HeapTuple SearchSysCache1(int cacheId, Datum key1)
Definition: syscache.c:1112
int get_func_input_arg_names(Datum proargnames, Datum proargmodes, char ***arg_names)
Definition: funcapi.c:935
#define TextDatumGetCString(d)
Definition: builtins.h:92
#define ANYARRAYOID
Definition: pg_type.h:688
MemoryContext AllocSetContextCreate(MemoryContext parent, const char *name, Size minContextSize, Size initBlockSize, Size maxBlockSize)
Definition: aset.c:322
uintptr_t Datum
Definition: postgres.h:372
void ReleaseSysCache(HeapTuple tuple)
Definition: syscache.c:1160
Datum SysCacheGetAttr(int cacheId, HeapTuple tup, AttrNumber attributeNumber, bool *isNull)
Definition: syscache.c:1368
static char * label
Definition: pg_basebackup.c:82
FuncCallContext * per_MultiFuncCall(PG_FUNCTION_ARGS)
Definition: funcapi.c:128
#define CHAROID
Definition: pg_type.h:296
FormData_pg_proc * Form_pg_proc
Definition: pg_proc.h:83
void * MemoryContextAllocZero(MemoryContext context, Size size)
Definition: mcxt.c:741
void end_MultiFuncCall(PG_FUNCTION_ARGS, FuncCallContext *funcctx)
Definition: funcapi.c:155
#define InvalidOid
Definition: postgres_ext.h:36
RegProcedure get_opcode(Oid opno)
Definition: lsyscache.c:1094
Oid fn_oid
Definition: fmgr.h:59
Oid get_typcollation(Oid typid)
Definition: lsyscache.c:2781
Oid exprInputCollation(const Node *expr)
Definition: nodeFuncs.c:921
#define HeapTupleIsValid(tuple)
Definition: htup.h:77
#define CSTRINGOID
Definition: pg_type.h:684
#define Assert(condition)
Definition: c.h:681
void RegisterExprContextCallback(ExprContext *econtext, ExprContextCallbackFunction function, Datum arg)
Definition: execUtils.c:737
fmNodePtr fn_expr
Definition: fmgr.h:66
MemoryContext multi_call_memory_ctx
Definition: funcapi.h:109
bool type_is_enum(Oid typid)
Definition: lsyscache.c:2414
Oid exprType(const Node *expr)
Definition: nodeFuncs.c:42
static int list_length(const List *l)
Definition: pg_list.h:89
#define type_is_array(typid)
Definition: lsyscache.h:180
void * fn_extra
Definition: fmgr.h:64
TupleDesc CreateTemplateTupleDesc(int natts, bool hasoid)
Definition: tupdesc.c:43
#define ARR_NDIM(a)
Definition: array.h:275
#define TYPTYPE_PSEUDO
Definition: pg_type.h:724
#define DatumGetPointer(X)
Definition: postgres.h:555
TupleDesc TypeGetTupleDesc(Oid typeoid, List *colaliases)
Definition: funcapi.c:1321
void deconstruct_array(ArrayType *array, Oid elmtype, int elmlen, bool elmbyval, char elmalign, Datum **elemsp, bool **nullsp, int *nelemsp)
Definition: arrayfuncs.c:3449
ExprContext * econtext
Definition: execnodes.h:266
#define Anum_pg_proc_proallargtypes
Definition: pg_proc.h:110
List * stringToQualifiedNameList(const char *string)
Definition: regproc.c:1687
void * user_fctx
Definition: funcapi.h:90
FuncCallContext * init_MultiFuncCall(PG_FUNCTION_ARGS)
Definition: funcapi.c:52
void * palloc(Size size)
Definition: mcxt.c:848
int errmsg(const char *fmt,...)
Definition: elog.c:797
int i
#define NameStr(name)
Definition: c.h:493
#define TYPTYPE_ENUM
Definition: pg_type.h:723
void * arg
TupleDesc RelationNameGetTupleDesc(const char *relname)
Definition: funcapi.c:1288
#define PG_FUNCTION_ARGS
Definition: fmgr.h:158
#define elog
Definition: elog.h:219
static bool resolve_polymorphic_tupdesc(TupleDesc tupdesc, oidvector *declared_args, Node *call_expr)
Definition: funcapi.c:403
static TypeFuncClass internal_get_result_type(Oid funcid, Node *call_expr, ReturnSetInfo *rsinfo, Oid *resultTypeId, TupleDesc *resultTupleDesc)
Definition: funcapi.c:289
Definition: pg_list.h:45
#define ARR_ELEMTYPE(a)
Definition: array.h:277
int16 AttrNumber
Definition: attnum.h:21
uint64 max_calls
Definition: funcapi.h:74
char * get_func_result_name(Oid functionId)
Definition: funcapi.c:1020
TupleDesc lookup_rowtype_tupdesc_copy(Oid type_id, int32 typmod)
Definition: typcache.c:1613
#define DatumGetArrayTypeP(X)
Definition: array.h:246