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functioncmds.c
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1 /*-------------------------------------------------------------------------
2  *
3  * functioncmds.c
4  *
5  * Routines for CREATE and DROP FUNCTION commands and CREATE and DROP
6  * CAST commands.
7  *
8  * Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
9  * Portions Copyright (c) 1994, Regents of the University of California
10  *
11  *
12  * IDENTIFICATION
13  * src/backend/commands/functioncmds.c
14  *
15  * DESCRIPTION
16  * These routines take the parse tree and pick out the
17  * appropriate arguments/flags, and pass the results to the
18  * corresponding "FooDefine" routines (in src/catalog) that do
19  * the actual catalog-munging. These routines also verify permission
20  * of the user to execute the command.
21  *
22  * NOTES
23  * These things must be defined and committed in the following order:
24  * "create function":
25  * input/output, recv/send procedures
26  * "create type":
27  * type
28  * "create operator":
29  * operators
30  *
31  *-------------------------------------------------------------------------
32  */
33 #include "postgres.h"
34 
35 #include "access/genam.h"
36 #include "access/htup_details.h"
37 #include "access/sysattr.h"
38 #include "access/table.h"
39 #include "catalog/catalog.h"
40 #include "catalog/dependency.h"
41 #include "catalog/indexing.h"
42 #include "catalog/objectaccess.h"
43 #include "catalog/pg_aggregate.h"
44 #include "catalog/pg_cast.h"
45 #include "catalog/pg_language.h"
46 #include "catalog/pg_namespace.h"
47 #include "catalog/pg_proc.h"
48 #include "catalog/pg_transform.h"
49 #include "catalog/pg_type.h"
50 #include "commands/alter.h"
51 #include "commands/defrem.h"
52 #include "commands/extension.h"
53 #include "commands/proclang.h"
54 #include "executor/execdesc.h"
55 #include "executor/executor.h"
56 #include "executor/functions.h"
57 #include "funcapi.h"
58 #include "miscadmin.h"
59 #include "optimizer/optimizer.h"
60 #include "parser/analyze.h"
61 #include "parser/parse_coerce.h"
62 #include "parser/parse_collate.h"
63 #include "parser/parse_expr.h"
64 #include "parser/parse_func.h"
65 #include "parser/parse_type.h"
66 #include "pgstat.h"
67 #include "tcop/pquery.h"
68 #include "tcop/utility.h"
69 #include "utils/acl.h"
70 #include "utils/builtins.h"
71 #include "utils/fmgroids.h"
72 #include "utils/guc.h"
73 #include "utils/lsyscache.h"
74 #include "utils/memutils.h"
75 #include "utils/rel.h"
76 #include "utils/snapmgr.h"
77 #include "utils/syscache.h"
78 #include "utils/typcache.h"
79 
80 /*
81  * Examine the RETURNS clause of the CREATE FUNCTION statement
82  * and return information about it as *prorettype_p and *returnsSet.
83  *
84  * This is more complex than the average typename lookup because we want to
85  * allow a shell type to be used, or even created if the specified return type
86  * doesn't exist yet. (Without this, there's no way to define the I/O procs
87  * for a new type.) But SQL function creation won't cope, so error out if
88  * the target language is SQL. (We do this here, not in the SQL-function
89  * validator, so as not to produce a NOTICE and then an ERROR for the same
90  * condition.)
91  */
92 static void
93 compute_return_type(TypeName *returnType, Oid languageOid,
94  Oid *prorettype_p, bool *returnsSet_p)
95 {
96  Oid rettype;
97  Type typtup;
98  AclResult aclresult;
99 
100  typtup = LookupTypeName(NULL, returnType, NULL, false);
101 
102  if (typtup)
103  {
104  if (!((Form_pg_type) GETSTRUCT(typtup))->typisdefined)
105  {
106  if (languageOid == SQLlanguageId)
107  ereport(ERROR,
108  (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
109  errmsg("SQL function cannot return shell type %s",
110  TypeNameToString(returnType))));
111  else
112  ereport(NOTICE,
113  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
114  errmsg("return type %s is only a shell",
115  TypeNameToString(returnType))));
116  }
117  rettype = typeTypeId(typtup);
118  ReleaseSysCache(typtup);
119  }
120  else
121  {
122  char *typnam = TypeNameToString(returnType);
123  Oid namespaceId;
124  AclResult aclresult;
125  char *typname;
126  ObjectAddress address;
127 
128  /*
129  * Only C-coded functions can be I/O functions. We enforce this
130  * restriction here mainly to prevent littering the catalogs with
131  * shell types due to simple typos in user-defined function
132  * definitions.
133  */
134  if (languageOid != INTERNALlanguageId &&
135  languageOid != ClanguageId)
136  ereport(ERROR,
137  (errcode(ERRCODE_UNDEFINED_OBJECT),
138  errmsg("type \"%s\" does not exist", typnam)));
139 
140  /* Reject if there's typmod decoration, too */
141  if (returnType->typmods != NIL)
142  ereport(ERROR,
143  (errcode(ERRCODE_SYNTAX_ERROR),
144  errmsg("type modifier cannot be specified for shell type \"%s\"",
145  typnam)));
146 
147  /* Otherwise, go ahead and make a shell type */
148  ereport(NOTICE,
149  (errcode(ERRCODE_UNDEFINED_OBJECT),
150  errmsg("type \"%s\" is not yet defined", typnam),
151  errdetail("Creating a shell type definition.")));
152  namespaceId = QualifiedNameGetCreationNamespace(returnType->names,
153  &typname);
154  aclresult = pg_namespace_aclcheck(namespaceId, GetUserId(),
155  ACL_CREATE);
156  if (aclresult != ACLCHECK_OK)
157  aclcheck_error(aclresult, OBJECT_SCHEMA,
158  get_namespace_name(namespaceId));
159  address = TypeShellMake(typname, namespaceId, GetUserId());
160  rettype = address.objectId;
161  Assert(OidIsValid(rettype));
162  }
163 
164  aclresult = pg_type_aclcheck(rettype, GetUserId(), ACL_USAGE);
165  if (aclresult != ACLCHECK_OK)
166  aclcheck_error_type(aclresult, rettype);
167 
168  *prorettype_p = rettype;
169  *returnsSet_p = returnType->setof;
170 }
171 
172 /*
173  * Interpret the function parameter list of a CREATE FUNCTION,
174  * CREATE PROCEDURE, or CREATE AGGREGATE statement.
175  *
176  * Input parameters:
177  * parameters: list of FunctionParameter structs
178  * languageOid: OID of function language (InvalidOid if it's CREATE AGGREGATE)
179  * objtype: identifies type of object being created
180  *
181  * Results are stored into output parameters. parameterTypes must always
182  * be created, but the other arrays/lists can be NULL pointers if not needed.
183  * variadicArgType is set to the variadic array type if there's a VARIADIC
184  * parameter (there can be only one); or to InvalidOid if not.
185  * requiredResultType is set to InvalidOid if there are no OUT parameters,
186  * else it is set to the OID of the implied result type.
187  */
188 void
190  List *parameters,
191  Oid languageOid,
192  ObjectType objtype,
193  oidvector **parameterTypes,
194  List **parameterTypes_list,
195  ArrayType **allParameterTypes,
196  ArrayType **parameterModes,
197  ArrayType **parameterNames,
198  List **inParameterNames_list,
199  List **parameterDefaults,
200  Oid *variadicArgType,
201  Oid *requiredResultType)
202 {
203  int parameterCount = list_length(parameters);
204  Oid *inTypes;
205  int inCount = 0;
206  Datum *allTypes;
207  Datum *paramModes;
208  Datum *paramNames;
209  int outCount = 0;
210  int varCount = 0;
211  bool have_names = false;
212  bool have_defaults = false;
213  ListCell *x;
214  int i;
215 
216  *variadicArgType = InvalidOid; /* default result */
217  *requiredResultType = InvalidOid; /* default result */
218 
219  inTypes = (Oid *) palloc(parameterCount * sizeof(Oid));
220  allTypes = (Datum *) palloc(parameterCount * sizeof(Datum));
221  paramModes = (Datum *) palloc(parameterCount * sizeof(Datum));
222  paramNames = (Datum *) palloc0(parameterCount * sizeof(Datum));
223  *parameterDefaults = NIL;
224 
225  /* Scan the list and extract data into work arrays */
226  i = 0;
227  foreach(x, parameters)
228  {
230  TypeName *t = fp->argType;
231  FunctionParameterMode fpmode = fp->mode;
232  bool isinput = false;
233  Oid toid;
234  Type typtup;
235  AclResult aclresult;
236 
237  /* For our purposes here, a defaulted mode spec is identical to IN */
238  if (fpmode == FUNC_PARAM_DEFAULT)
239  fpmode = FUNC_PARAM_IN;
240 
241  typtup = LookupTypeName(NULL, t, NULL, false);
242  if (typtup)
243  {
244  if (!((Form_pg_type) GETSTRUCT(typtup))->typisdefined)
245  {
246  /* As above, hard error if language is SQL */
247  if (languageOid == SQLlanguageId)
248  ereport(ERROR,
249  (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
250  errmsg("SQL function cannot accept shell type %s",
251  TypeNameToString(t))));
252  /* We don't allow creating aggregates on shell types either */
253  else if (objtype == OBJECT_AGGREGATE)
254  ereport(ERROR,
255  (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
256  errmsg("aggregate cannot accept shell type %s",
257  TypeNameToString(t))));
258  else
259  ereport(NOTICE,
260  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
261  errmsg("argument type %s is only a shell",
262  TypeNameToString(t))));
263  }
264  toid = typeTypeId(typtup);
265  ReleaseSysCache(typtup);
266  }
267  else
268  {
269  ereport(ERROR,
270  (errcode(ERRCODE_UNDEFINED_OBJECT),
271  errmsg("type %s does not exist",
272  TypeNameToString(t))));
273  toid = InvalidOid; /* keep compiler quiet */
274  }
275 
276  aclresult = pg_type_aclcheck(toid, GetUserId(), ACL_USAGE);
277  if (aclresult != ACLCHECK_OK)
278  aclcheck_error_type(aclresult, toid);
279 
280  if (t->setof)
281  {
282  if (objtype == OBJECT_AGGREGATE)
283  ereport(ERROR,
284  (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
285  errmsg("aggregates cannot accept set arguments")));
286  else if (objtype == OBJECT_PROCEDURE)
287  ereport(ERROR,
288  (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
289  errmsg("procedures cannot accept set arguments")));
290  else
291  ereport(ERROR,
292  (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
293  errmsg("functions cannot accept set arguments")));
294  }
295 
296  /* handle input parameters */
297  if (fpmode != FUNC_PARAM_OUT && fpmode != FUNC_PARAM_TABLE)
298  {
299  /* other input parameters can't follow a VARIADIC parameter */
300  if (varCount > 0)
301  ereport(ERROR,
302  (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
303  errmsg("VARIADIC parameter must be the last input parameter")));
304  inTypes[inCount++] = toid;
305  isinput = true;
306  if (parameterTypes_list)
307  *parameterTypes_list = lappend_oid(*parameterTypes_list, toid);
308  }
309 
310  /* handle output parameters */
311  if (fpmode != FUNC_PARAM_IN && fpmode != FUNC_PARAM_VARIADIC)
312  {
313  if (objtype == OBJECT_PROCEDURE)
314  {
315  /*
316  * We disallow OUT-after-VARIADIC only for procedures. While
317  * such a case causes no confusion in ordinary function calls,
318  * it would cause confusion in a CALL statement.
319  */
320  if (varCount > 0)
321  ereport(ERROR,
322  (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
323  errmsg("VARIADIC parameter must be the last parameter")));
324  /* Procedures with output parameters always return RECORD */
325  *requiredResultType = RECORDOID;
326  }
327  else if (outCount == 0) /* save first output param's type */
328  *requiredResultType = toid;
329  outCount++;
330  }
331 
332  if (fpmode == FUNC_PARAM_VARIADIC)
333  {
334  *variadicArgType = toid;
335  varCount++;
336  /* validate variadic parameter type */
337  switch (toid)
338  {
339  case ANYARRAYOID:
340  case ANYCOMPATIBLEARRAYOID:
341  case ANYOID:
342  /* okay */
343  break;
344  default:
345  if (!OidIsValid(get_element_type(toid)))
346  ereport(ERROR,
347  (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
348  errmsg("VARIADIC parameter must be an array")));
349  break;
350  }
351  }
352 
353  allTypes[i] = ObjectIdGetDatum(toid);
354 
355  paramModes[i] = CharGetDatum(fpmode);
356 
357  if (fp->name && fp->name[0])
358  {
359  ListCell *px;
360 
361  /*
362  * As of Postgres 9.0 we disallow using the same name for two
363  * input or two output function parameters. Depending on the
364  * function's language, conflicting input and output names might
365  * be bad too, but we leave it to the PL to complain if so.
366  */
367  foreach(px, parameters)
368  {
370  FunctionParameterMode prevfpmode;
371 
372  if (prevfp == fp)
373  break;
374  /* as above, default mode is IN */
375  prevfpmode = prevfp->mode;
376  if (prevfpmode == FUNC_PARAM_DEFAULT)
377  prevfpmode = FUNC_PARAM_IN;
378  /* pure in doesn't conflict with pure out */
379  if ((fpmode == FUNC_PARAM_IN ||
380  fpmode == FUNC_PARAM_VARIADIC) &&
381  (prevfpmode == FUNC_PARAM_OUT ||
382  prevfpmode == FUNC_PARAM_TABLE))
383  continue;
384  if ((prevfpmode == FUNC_PARAM_IN ||
385  prevfpmode == FUNC_PARAM_VARIADIC) &&
386  (fpmode == FUNC_PARAM_OUT ||
387  fpmode == FUNC_PARAM_TABLE))
388  continue;
389  if (prevfp->name && prevfp->name[0] &&
390  strcmp(prevfp->name, fp->name) == 0)
391  ereport(ERROR,
392  (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
393  errmsg("parameter name \"%s\" used more than once",
394  fp->name)));
395  }
396 
397  paramNames[i] = CStringGetTextDatum(fp->name);
398  have_names = true;
399  }
400 
401  if (inParameterNames_list)
402  *inParameterNames_list = lappend(*inParameterNames_list, makeString(fp->name ? fp->name : pstrdup("")));
403 
404  if (fp->defexpr)
405  {
406  Node *def;
407 
408  if (!isinput)
409  ereport(ERROR,
410  (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
411  errmsg("only input parameters can have default values")));
412 
413  def = transformExpr(pstate, fp->defexpr,
415  def = coerce_to_specific_type(pstate, def, toid, "DEFAULT");
416  assign_expr_collations(pstate, def);
417 
418  /*
419  * Make sure no variables are referred to (this is probably dead
420  * code now that add_missing_from is history).
421  */
422  if (list_length(pstate->p_rtable) != 0 ||
423  contain_var_clause(def))
424  ereport(ERROR,
425  (errcode(ERRCODE_INVALID_COLUMN_REFERENCE),
426  errmsg("cannot use table references in parameter default value")));
427 
428  /*
429  * transformExpr() should have already rejected subqueries,
430  * aggregates, and window functions, based on the EXPR_KIND_ for a
431  * default expression.
432  *
433  * It can't return a set either --- but coerce_to_specific_type
434  * already checked that for us.
435  *
436  * Note: the point of these restrictions is to ensure that an
437  * expression that, on its face, hasn't got subplans, aggregates,
438  * etc cannot suddenly have them after function default arguments
439  * are inserted.
440  */
441 
442  *parameterDefaults = lappend(*parameterDefaults, def);
443  have_defaults = true;
444  }
445  else
446  {
447  if (isinput && have_defaults)
448  ereport(ERROR,
449  (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
450  errmsg("input parameters after one with a default value must also have defaults")));
451 
452  /*
453  * For procedures, we also can't allow OUT parameters after one
454  * with a default, because the same sort of confusion arises in a
455  * CALL statement.
456  */
457  if (objtype == OBJECT_PROCEDURE && have_defaults)
458  ereport(ERROR,
459  (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
460  errmsg("procedure OUT parameters cannot appear after one with a default value")));
461  }
462 
463  i++;
464  }
465 
466  /* Now construct the proper outputs as needed */
467  *parameterTypes = buildoidvector(inTypes, inCount);
468 
469  if (outCount > 0 || varCount > 0)
470  {
471  *allParameterTypes = construct_array(allTypes, parameterCount, OIDOID,
472  sizeof(Oid), true, TYPALIGN_INT);
473  *parameterModes = construct_array(paramModes, parameterCount, CHAROID,
474  1, true, TYPALIGN_CHAR);
475  if (outCount > 1)
476  *requiredResultType = RECORDOID;
477  /* otherwise we set requiredResultType correctly above */
478  }
479  else
480  {
481  *allParameterTypes = NULL;
482  *parameterModes = NULL;
483  }
484 
485  if (have_names)
486  {
487  for (i = 0; i < parameterCount; i++)
488  {
489  if (paramNames[i] == PointerGetDatum(NULL))
490  paramNames[i] = CStringGetTextDatum("");
491  }
492  *parameterNames = construct_array(paramNames, parameterCount, TEXTOID,
493  -1, false, TYPALIGN_INT);
494  }
495  else
496  *parameterNames = NULL;
497 }
498 
499 
500 /*
501  * Recognize one of the options that can be passed to both CREATE
502  * FUNCTION and ALTER FUNCTION and return it via one of the out
503  * parameters. Returns true if the passed option was recognized. If
504  * the out parameter we were going to assign to points to non-NULL,
505  * raise a duplicate-clause error. (We don't try to detect duplicate
506  * SET parameters though --- if you're redundant, the last one wins.)
507  */
508 static bool
510  bool is_procedure,
511  DefElem *defel,
512  DefElem **volatility_item,
513  DefElem **strict_item,
514  DefElem **security_item,
515  DefElem **leakproof_item,
516  List **set_items,
517  DefElem **cost_item,
518  DefElem **rows_item,
519  DefElem **support_item,
520  DefElem **parallel_item)
521 {
522  if (strcmp(defel->defname, "volatility") == 0)
523  {
524  if (is_procedure)
525  goto procedure_error;
526  if (*volatility_item)
527  errorConflictingDefElem(defel, pstate);
528 
529  *volatility_item = defel;
530  }
531  else if (strcmp(defel->defname, "strict") == 0)
532  {
533  if (is_procedure)
534  goto procedure_error;
535  if (*strict_item)
536  errorConflictingDefElem(defel, pstate);
537 
538  *strict_item = defel;
539  }
540  else if (strcmp(defel->defname, "security") == 0)
541  {
542  if (*security_item)
543  errorConflictingDefElem(defel, pstate);
544 
545  *security_item = defel;
546  }
547  else if (strcmp(defel->defname, "leakproof") == 0)
548  {
549  if (is_procedure)
550  goto procedure_error;
551  if (*leakproof_item)
552  errorConflictingDefElem(defel, pstate);
553 
554  *leakproof_item = defel;
555  }
556  else if (strcmp(defel->defname, "set") == 0)
557  {
558  *set_items = lappend(*set_items, defel->arg);
559  }
560  else if (strcmp(defel->defname, "cost") == 0)
561  {
562  if (is_procedure)
563  goto procedure_error;
564  if (*cost_item)
565  errorConflictingDefElem(defel, pstate);
566 
567  *cost_item = defel;
568  }
569  else if (strcmp(defel->defname, "rows") == 0)
570  {
571  if (is_procedure)
572  goto procedure_error;
573  if (*rows_item)
574  errorConflictingDefElem(defel, pstate);
575 
576  *rows_item = defel;
577  }
578  else if (strcmp(defel->defname, "support") == 0)
579  {
580  if (is_procedure)
581  goto procedure_error;
582  if (*support_item)
583  errorConflictingDefElem(defel, pstate);
584 
585  *support_item = defel;
586  }
587  else if (strcmp(defel->defname, "parallel") == 0)
588  {
589  if (is_procedure)
590  goto procedure_error;
591  if (*parallel_item)
592  errorConflictingDefElem(defel, pstate);
593 
594  *parallel_item = defel;
595  }
596  else
597  return false;
598 
599  /* Recognized an option */
600  return true;
601 
602 procedure_error:
603  ereport(ERROR,
604  (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
605  errmsg("invalid attribute in procedure definition"),
606  parser_errposition(pstate, defel->location)));
607  return false;
608 }
609 
610 static char
612 {
613  char *str = strVal(defel->arg);
614 
615  if (strcmp(str, "immutable") == 0)
616  return PROVOLATILE_IMMUTABLE;
617  else if (strcmp(str, "stable") == 0)
618  return PROVOLATILE_STABLE;
619  else if (strcmp(str, "volatile") == 0)
620  return PROVOLATILE_VOLATILE;
621  else
622  {
623  elog(ERROR, "invalid volatility \"%s\"", str);
624  return 0; /* keep compiler quiet */
625  }
626 }
627 
628 static char
630 {
631  char *str = strVal(defel->arg);
632 
633  if (strcmp(str, "safe") == 0)
634  return PROPARALLEL_SAFE;
635  else if (strcmp(str, "unsafe") == 0)
636  return PROPARALLEL_UNSAFE;
637  else if (strcmp(str, "restricted") == 0)
638  return PROPARALLEL_RESTRICTED;
639  else
640  {
641  ereport(ERROR,
642  (errcode(ERRCODE_SYNTAX_ERROR),
643  errmsg("parameter \"parallel\" must be SAFE, RESTRICTED, or UNSAFE")));
644  return PROPARALLEL_UNSAFE; /* keep compiler quiet */
645  }
646 }
647 
648 /*
649  * Update a proconfig value according to a list of VariableSetStmt items.
650  *
651  * The input and result may be NULL to signify a null entry.
652  */
653 static ArrayType *
655 {
656  ListCell *l;
657 
658  foreach(l, set_items)
659  {
661 
662  if (sstmt->kind == VAR_RESET_ALL)
663  a = NULL;
664  else
665  {
666  char *valuestr = ExtractSetVariableArgs(sstmt);
667 
668  if (valuestr)
669  a = GUCArrayAdd(a, sstmt->name, valuestr);
670  else /* RESET */
671  a = GUCArrayDelete(a, sstmt->name);
672  }
673  }
674 
675  return a;
676 }
677 
678 static Oid
680 {
681  List *procName = defGetQualifiedName(defel);
682  Oid procOid;
683  Oid argList[1];
684 
685  /*
686  * Support functions always take one INTERNAL argument and return
687  * INTERNAL.
688  */
689  argList[0] = INTERNALOID;
690 
691  procOid = LookupFuncName(procName, 1, argList, true);
692  if (!OidIsValid(procOid))
693  ereport(ERROR,
694  (errcode(ERRCODE_UNDEFINED_FUNCTION),
695  errmsg("function %s does not exist",
696  func_signature_string(procName, 1, NIL, argList))));
697 
698  if (get_func_rettype(procOid) != INTERNALOID)
699  ereport(ERROR,
700  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
701  errmsg("support function %s must return type %s",
702  NameListToString(procName), "internal")));
703 
704  /*
705  * Someday we might want an ACL check here; but for now, we insist that
706  * you be superuser to specify a support function, so privilege on the
707  * support function is moot.
708  */
709  if (!superuser())
710  ereport(ERROR,
711  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
712  errmsg("must be superuser to specify a support function")));
713 
714  return procOid;
715 }
716 
717 
718 /*
719  * Dissect the list of options assembled in gram.y into function
720  * attributes.
721  */
722 static void
724  bool is_procedure,
725  List *options,
726  List **as,
727  char **language,
728  Node **transform,
729  bool *windowfunc_p,
730  char *volatility_p,
731  bool *strict_p,
732  bool *security_definer,
733  bool *leakproof_p,
734  ArrayType **proconfig,
735  float4 *procost,
736  float4 *prorows,
737  Oid *prosupport,
738  char *parallel_p)
739 {
740  ListCell *option;
741  DefElem *as_item = NULL;
742  DefElem *language_item = NULL;
743  DefElem *transform_item = NULL;
744  DefElem *windowfunc_item = NULL;
745  DefElem *volatility_item = NULL;
746  DefElem *strict_item = NULL;
747  DefElem *security_item = NULL;
748  DefElem *leakproof_item = NULL;
749  List *set_items = NIL;
750  DefElem *cost_item = NULL;
751  DefElem *rows_item = NULL;
752  DefElem *support_item = NULL;
753  DefElem *parallel_item = NULL;
754 
755  foreach(option, options)
756  {
757  DefElem *defel = (DefElem *) lfirst(option);
758 
759  if (strcmp(defel->defname, "as") == 0)
760  {
761  if (as_item)
762  errorConflictingDefElem(defel, pstate);
763  as_item = defel;
764  }
765  else if (strcmp(defel->defname, "language") == 0)
766  {
767  if (language_item)
768  errorConflictingDefElem(defel, pstate);
769  language_item = defel;
770  }
771  else if (strcmp(defel->defname, "transform") == 0)
772  {
773  if (transform_item)
774  errorConflictingDefElem(defel, pstate);
775  transform_item = defel;
776  }
777  else if (strcmp(defel->defname, "window") == 0)
778  {
779  if (windowfunc_item)
780  errorConflictingDefElem(defel, pstate);
781  if (is_procedure)
782  ereport(ERROR,
783  (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
784  errmsg("invalid attribute in procedure definition"),
785  parser_errposition(pstate, defel->location)));
786  windowfunc_item = defel;
787  }
788  else if (compute_common_attribute(pstate,
789  is_procedure,
790  defel,
791  &volatility_item,
792  &strict_item,
793  &security_item,
794  &leakproof_item,
795  &set_items,
796  &cost_item,
797  &rows_item,
798  &support_item,
799  &parallel_item))
800  {
801  /* recognized common option */
802  continue;
803  }
804  else
805  elog(ERROR, "option \"%s\" not recognized",
806  defel->defname);
807  }
808 
809  if (as_item)
810  *as = (List *) as_item->arg;
811  if (language_item)
812  *language = strVal(language_item->arg);
813  if (transform_item)
814  *transform = transform_item->arg;
815  if (windowfunc_item)
816  *windowfunc_p = boolVal(windowfunc_item->arg);
817  if (volatility_item)
818  *volatility_p = interpret_func_volatility(volatility_item);
819  if (strict_item)
820  *strict_p = boolVal(strict_item->arg);
821  if (security_item)
822  *security_definer = boolVal(security_item->arg);
823  if (leakproof_item)
824  *leakproof_p = boolVal(leakproof_item->arg);
825  if (set_items)
826  *proconfig = update_proconfig_value(NULL, set_items);
827  if (cost_item)
828  {
829  *procost = defGetNumeric(cost_item);
830  if (*procost <= 0)
831  ereport(ERROR,
832  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
833  errmsg("COST must be positive")));
834  }
835  if (rows_item)
836  {
837  *prorows = defGetNumeric(rows_item);
838  if (*prorows <= 0)
839  ereport(ERROR,
840  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
841  errmsg("ROWS must be positive")));
842  }
843  if (support_item)
844  *prosupport = interpret_func_support(support_item);
845  if (parallel_item)
846  *parallel_p = interpret_func_parallel(parallel_item);
847 }
848 
849 
850 /*
851  * For a dynamically linked C language object, the form of the clause is
852  *
853  * AS <object file name> [, <link symbol name> ]
854  *
855  * In all other cases
856  *
857  * AS <object reference, or sql code>
858  */
859 static void
860 interpret_AS_clause(Oid languageOid, const char *languageName,
861  char *funcname, List *as, Node *sql_body_in,
862  List *parameterTypes, List *inParameterNames,
863  char **prosrc_str_p, char **probin_str_p,
864  Node **sql_body_out,
865  const char *queryString)
866 {
867  if (!sql_body_in && !as)
868  ereport(ERROR,
869  (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
870  errmsg("no function body specified")));
871 
872  if (sql_body_in && as)
873  ereport(ERROR,
874  (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
875  errmsg("duplicate function body specified")));
876 
877  if (sql_body_in && languageOid != SQLlanguageId)
878  ereport(ERROR,
879  (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
880  errmsg("inline SQL function body only valid for language SQL")));
881 
882  *sql_body_out = NULL;
883 
884  if (languageOid == ClanguageId)
885  {
886  /*
887  * For "C" language, store the file name in probin and, when given,
888  * the link symbol name in prosrc. If link symbol is omitted,
889  * substitute procedure name. We also allow link symbol to be
890  * specified as "-", since that was the habit in PG versions before
891  * 8.4, and there might be dump files out there that don't translate
892  * that back to "omitted".
893  */
894  *probin_str_p = strVal(linitial(as));
895  if (list_length(as) == 1)
896  *prosrc_str_p = funcname;
897  else
898  {
899  *prosrc_str_p = strVal(lsecond(as));
900  if (strcmp(*prosrc_str_p, "-") == 0)
901  *prosrc_str_p = funcname;
902  }
903  }
904  else if (sql_body_in)
905  {
907 
909 
910  pinfo->fname = funcname;
911  pinfo->nargs = list_length(parameterTypes);
912  pinfo->argtypes = (Oid *) palloc(pinfo->nargs * sizeof(Oid));
913  pinfo->argnames = (char **) palloc(pinfo->nargs * sizeof(char *));
914  for (int i = 0; i < list_length(parameterTypes); i++)
915  {
916  char *s = strVal(list_nth(inParameterNames, i));
917 
918  pinfo->argtypes[i] = list_nth_oid(parameterTypes, i);
919  if (IsPolymorphicType(pinfo->argtypes[i]))
920  ereport(ERROR,
921  (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
922  errmsg("SQL function with unquoted function body cannot have polymorphic arguments")));
923 
924  if (s[0] != '\0')
925  pinfo->argnames[i] = s;
926  else
927  pinfo->argnames[i] = NULL;
928  }
929 
930  if (IsA(sql_body_in, List))
931  {
932  List *stmts = linitial_node(List, castNode(List, sql_body_in));
933  ListCell *lc;
934  List *transformed_stmts = NIL;
935 
936  foreach(lc, stmts)
937  {
938  Node *stmt = lfirst(lc);
939  Query *q;
940  ParseState *pstate = make_parsestate(NULL);
941 
942  pstate->p_sourcetext = queryString;
943  sql_fn_parser_setup(pstate, pinfo);
944  q = transformStmt(pstate, stmt);
945  if (q->commandType == CMD_UTILITY)
946  ereport(ERROR,
947  errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
948  errmsg("%s is not yet supported in unquoted SQL function body",
950  transformed_stmts = lappend(transformed_stmts, q);
951  free_parsestate(pstate);
952  }
953 
954  *sql_body_out = (Node *) list_make1(transformed_stmts);
955  }
956  else
957  {
958  Query *q;
959  ParseState *pstate = make_parsestate(NULL);
960 
961  pstate->p_sourcetext = queryString;
962  sql_fn_parser_setup(pstate, pinfo);
963  q = transformStmt(pstate, sql_body_in);
964  if (q->commandType == CMD_UTILITY)
965  ereport(ERROR,
966  errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
967  errmsg("%s is not yet supported in unquoted SQL function body",
969  free_parsestate(pstate);
970 
971  *sql_body_out = (Node *) q;
972  }
973 
974  /*
975  * We must put something in prosrc. For the moment, just record an
976  * empty string. It might be useful to store the original text of the
977  * CREATE FUNCTION statement --- but to make actual use of that in
978  * error reports, we'd also have to adjust readfuncs.c to not throw
979  * away node location fields when reading prosqlbody.
980  */
981  *prosrc_str_p = pstrdup("");
982 
983  /* But we definitely don't need probin. */
984  *probin_str_p = NULL;
985  }
986  else
987  {
988  /* Everything else wants the given string in prosrc. */
989  *prosrc_str_p = strVal(linitial(as));
990  *probin_str_p = NULL;
991 
992  if (list_length(as) != 1)
993  ereport(ERROR,
994  (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
995  errmsg("only one AS item needed for language \"%s\"",
996  languageName)));
997 
998  if (languageOid == INTERNALlanguageId)
999  {
1000  /*
1001  * In PostgreSQL versions before 6.5, the SQL name of the created
1002  * function could not be different from the internal name, and
1003  * "prosrc" wasn't used. So there is code out there that does
1004  * CREATE FUNCTION xyz AS '' LANGUAGE internal. To preserve some
1005  * modicum of backwards compatibility, accept an empty "prosrc"
1006  * value as meaning the supplied SQL function name.
1007  */
1008  if (strlen(*prosrc_str_p) == 0)
1009  *prosrc_str_p = funcname;
1010  }
1011  }
1012 }
1013 
1014 
1015 /*
1016  * CreateFunction
1017  * Execute a CREATE FUNCTION (or CREATE PROCEDURE) utility statement.
1018  */
1021 {
1022  char *probin_str;
1023  char *prosrc_str;
1024  Node *prosqlbody;
1025  Oid prorettype;
1026  bool returnsSet;
1027  char *language;
1028  Oid languageOid;
1029  Oid languageValidator;
1030  Node *transformDefElem = NULL;
1031  char *funcname;
1032  Oid namespaceId;
1033  AclResult aclresult;
1034  oidvector *parameterTypes;
1035  List *parameterTypes_list = NIL;
1036  ArrayType *allParameterTypes;
1037  ArrayType *parameterModes;
1038  ArrayType *parameterNames;
1039  List *inParameterNames_list = NIL;
1040  List *parameterDefaults;
1041  Oid variadicArgType;
1042  List *trftypes_list = NIL;
1043  ArrayType *trftypes;
1044  Oid requiredResultType;
1045  bool isWindowFunc,
1046  isStrict,
1047  security,
1048  isLeakProof;
1049  char volatility;
1050  ArrayType *proconfig;
1051  float4 procost;
1052  float4 prorows;
1053  Oid prosupport;
1054  HeapTuple languageTuple;
1055  Form_pg_language languageStruct;
1056  List *as_clause;
1057  char parallel;
1058 
1059  /* Convert list of names to a name and namespace */
1060  namespaceId = QualifiedNameGetCreationNamespace(stmt->funcname,
1061  &funcname);
1062 
1063  /* Check we have creation rights in target namespace */
1064  aclresult = pg_namespace_aclcheck(namespaceId, GetUserId(), ACL_CREATE);
1065  if (aclresult != ACLCHECK_OK)
1066  aclcheck_error(aclresult, OBJECT_SCHEMA,
1067  get_namespace_name(namespaceId));
1068 
1069  /* Set default attributes */
1070  as_clause = NIL;
1071  language = NULL;
1072  isWindowFunc = false;
1073  isStrict = false;
1074  security = false;
1075  isLeakProof = false;
1076  volatility = PROVOLATILE_VOLATILE;
1077  proconfig = NULL;
1078  procost = -1; /* indicates not set */
1079  prorows = -1; /* indicates not set */
1080  prosupport = InvalidOid;
1081  parallel = PROPARALLEL_UNSAFE;
1082 
1083  /* Extract non-default attributes from stmt->options list */
1085  stmt->is_procedure,
1086  stmt->options,
1087  &as_clause, &language, &transformDefElem,
1088  &isWindowFunc, &volatility,
1089  &isStrict, &security, &isLeakProof,
1090  &proconfig, &procost, &prorows,
1091  &prosupport, &parallel);
1092 
1093  if (!language)
1094  {
1095  if (stmt->sql_body)
1096  language = "sql";
1097  else
1098  ereport(ERROR,
1099  (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
1100  errmsg("no language specified")));
1101  }
1102 
1103  /* Look up the language and validate permissions */
1104  languageTuple = SearchSysCache1(LANGNAME, PointerGetDatum(language));
1105  if (!HeapTupleIsValid(languageTuple))
1106  ereport(ERROR,
1107  (errcode(ERRCODE_UNDEFINED_OBJECT),
1108  errmsg("language \"%s\" does not exist", language),
1109  (extension_file_exists(language) ?
1110  errhint("Use CREATE EXTENSION to load the language into the database.") : 0)));
1111 
1112  languageStruct = (Form_pg_language) GETSTRUCT(languageTuple);
1113  languageOid = languageStruct->oid;
1114 
1115  if (languageStruct->lanpltrusted)
1116  {
1117  /* if trusted language, need USAGE privilege */
1118  AclResult aclresult;
1119 
1120  aclresult = pg_language_aclcheck(languageOid, GetUserId(), ACL_USAGE);
1121  if (aclresult != ACLCHECK_OK)
1122  aclcheck_error(aclresult, OBJECT_LANGUAGE,
1123  NameStr(languageStruct->lanname));
1124  }
1125  else
1126  {
1127  /* if untrusted language, must be superuser */
1128  if (!superuser())
1130  NameStr(languageStruct->lanname));
1131  }
1132 
1133  languageValidator = languageStruct->lanvalidator;
1134 
1135  ReleaseSysCache(languageTuple);
1136 
1137  /*
1138  * Only superuser is allowed to create leakproof functions because
1139  * leakproof functions can see tuples which have not yet been filtered out
1140  * by security barrier views or row-level security policies.
1141  */
1142  if (isLeakProof && !superuser())
1143  ereport(ERROR,
1144  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
1145  errmsg("only superuser can define a leakproof function")));
1146 
1147  if (transformDefElem)
1148  {
1149  ListCell *lc;
1150 
1151  foreach(lc, castNode(List, transformDefElem))
1152  {
1153  Oid typeid = typenameTypeId(NULL,
1154  lfirst_node(TypeName, lc));
1155  Oid elt = get_base_element_type(typeid);
1156 
1157  typeid = elt ? elt : typeid;
1158 
1159  get_transform_oid(typeid, languageOid, false);
1160  trftypes_list = lappend_oid(trftypes_list, typeid);
1161  }
1162  }
1163 
1164  /*
1165  * Convert remaining parameters of CREATE to form wanted by
1166  * ProcedureCreate.
1167  */
1169  stmt->parameters,
1170  languageOid,
1172  &parameterTypes,
1173  &parameterTypes_list,
1174  &allParameterTypes,
1175  &parameterModes,
1176  &parameterNames,
1177  &inParameterNames_list,
1178  &parameterDefaults,
1179  &variadicArgType,
1180  &requiredResultType);
1181 
1182  if (stmt->is_procedure)
1183  {
1184  Assert(!stmt->returnType);
1185  prorettype = requiredResultType ? requiredResultType : VOIDOID;
1186  returnsSet = false;
1187  }
1188  else if (stmt->returnType)
1189  {
1190  /* explicit RETURNS clause */
1191  compute_return_type(stmt->returnType, languageOid,
1192  &prorettype, &returnsSet);
1193  if (OidIsValid(requiredResultType) && prorettype != requiredResultType)
1194  ereport(ERROR,
1195  (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
1196  errmsg("function result type must be %s because of OUT parameters",
1197  format_type_be(requiredResultType))));
1198  }
1199  else if (OidIsValid(requiredResultType))
1200  {
1201  /* default RETURNS clause from OUT parameters */
1202  prorettype = requiredResultType;
1203  returnsSet = false;
1204  }
1205  else
1206  {
1207  ereport(ERROR,
1208  (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
1209  errmsg("function result type must be specified")));
1210  /* Alternative possibility: default to RETURNS VOID */
1211  prorettype = VOIDOID;
1212  returnsSet = false;
1213  }
1214 
1215  if (list_length(trftypes_list) > 0)
1216  {
1217  ListCell *lc;
1218  Datum *arr;
1219  int i;
1220 
1221  arr = palloc(list_length(trftypes_list) * sizeof(Datum));
1222  i = 0;
1223  foreach(lc, trftypes_list)
1224  arr[i++] = ObjectIdGetDatum(lfirst_oid(lc));
1225  trftypes = construct_array(arr, list_length(trftypes_list),
1226  OIDOID, sizeof(Oid), true, TYPALIGN_INT);
1227  }
1228  else
1229  {
1230  /* store SQL NULL instead of empty array */
1231  trftypes = NULL;
1232  }
1233 
1234  interpret_AS_clause(languageOid, language, funcname, as_clause, stmt->sql_body,
1235  parameterTypes_list, inParameterNames_list,
1236  &prosrc_str, &probin_str, &prosqlbody,
1237  pstate->p_sourcetext);
1238 
1239  /*
1240  * Set default values for COST and ROWS depending on other parameters;
1241  * reject ROWS if it's not returnsSet. NB: pg_dump knows these default
1242  * values, keep it in sync if you change them.
1243  */
1244  if (procost < 0)
1245  {
1246  /* SQL and PL-language functions are assumed more expensive */
1247  if (languageOid == INTERNALlanguageId ||
1248  languageOid == ClanguageId)
1249  procost = 1;
1250  else
1251  procost = 100;
1252  }
1253  if (prorows < 0)
1254  {
1255  if (returnsSet)
1256  prorows = 1000;
1257  else
1258  prorows = 0; /* dummy value if not returnsSet */
1259  }
1260  else if (!returnsSet)
1261  ereport(ERROR,
1262  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1263  errmsg("ROWS is not applicable when function does not return a set")));
1264 
1265  /*
1266  * And now that we have all the parameters, and know we're permitted to do
1267  * so, go ahead and create the function.
1268  */
1269  return ProcedureCreate(funcname,
1270  namespaceId,
1271  stmt->replace,
1272  returnsSet,
1273  prorettype,
1274  GetUserId(),
1275  languageOid,
1276  languageValidator,
1277  prosrc_str, /* converted to text later */
1278  probin_str, /* converted to text later */
1279  prosqlbody,
1280  stmt->is_procedure ? PROKIND_PROCEDURE : (isWindowFunc ? PROKIND_WINDOW : PROKIND_FUNCTION),
1281  security,
1282  isLeakProof,
1283  isStrict,
1284  volatility,
1285  parallel,
1286  parameterTypes,
1287  PointerGetDatum(allParameterTypes),
1288  PointerGetDatum(parameterModes),
1289  PointerGetDatum(parameterNames),
1290  parameterDefaults,
1291  PointerGetDatum(trftypes),
1292  PointerGetDatum(proconfig),
1293  prosupport,
1294  procost,
1295  prorows);
1296 }
1297 
1298 /*
1299  * Guts of function deletion.
1300  *
1301  * Note: this is also used for aggregate deletion, since the OIDs of
1302  * both functions and aggregates point to pg_proc.
1303  */
1304 void
1306 {
1307  Relation relation;
1308  HeapTuple tup;
1309  char prokind;
1310 
1311  /*
1312  * Delete the pg_proc tuple.
1313  */
1314  relation = table_open(ProcedureRelationId, RowExclusiveLock);
1315 
1316  tup = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcOid));
1317  if (!HeapTupleIsValid(tup)) /* should not happen */
1318  elog(ERROR, "cache lookup failed for function %u", funcOid);
1319 
1320  prokind = ((Form_pg_proc) GETSTRUCT(tup))->prokind;
1321 
1322  CatalogTupleDelete(relation, &tup->t_self);
1323 
1324  ReleaseSysCache(tup);
1325 
1326  table_close(relation, RowExclusiveLock);
1327 
1328  pgstat_drop_function(funcOid);
1329 
1330  /*
1331  * If there's a pg_aggregate tuple, delete that too.
1332  */
1333  if (prokind == PROKIND_AGGREGATE)
1334  {
1335  relation = table_open(AggregateRelationId, RowExclusiveLock);
1336 
1337  tup = SearchSysCache1(AGGFNOID, ObjectIdGetDatum(funcOid));
1338  if (!HeapTupleIsValid(tup)) /* should not happen */
1339  elog(ERROR, "cache lookup failed for pg_aggregate tuple for function %u", funcOid);
1340 
1341  CatalogTupleDelete(relation, &tup->t_self);
1342 
1343  ReleaseSysCache(tup);
1344 
1345  table_close(relation, RowExclusiveLock);
1346  }
1347 }
1348 
1349 /*
1350  * Implements the ALTER FUNCTION utility command (except for the
1351  * RENAME and OWNER clauses, which are handled as part of the generic
1352  * ALTER framework).
1353  */
1356 {
1357  HeapTuple tup;
1358  Oid funcOid;
1359  Form_pg_proc procForm;
1360  bool is_procedure;
1361  Relation rel;
1362  ListCell *l;
1363  DefElem *volatility_item = NULL;
1364  DefElem *strict_item = NULL;
1365  DefElem *security_def_item = NULL;
1366  DefElem *leakproof_item = NULL;
1367  List *set_items = NIL;
1368  DefElem *cost_item = NULL;
1369  DefElem *rows_item = NULL;
1370  DefElem *support_item = NULL;
1371  DefElem *parallel_item = NULL;
1372  ObjectAddress address;
1373 
1374  rel = table_open(ProcedureRelationId, RowExclusiveLock);
1375 
1376  funcOid = LookupFuncWithArgs(stmt->objtype, stmt->func, false);
1377 
1378  ObjectAddressSet(address, ProcedureRelationId, funcOid);
1379 
1380  tup = SearchSysCacheCopy1(PROCOID, ObjectIdGetDatum(funcOid));
1381  if (!HeapTupleIsValid(tup)) /* should not happen */
1382  elog(ERROR, "cache lookup failed for function %u", funcOid);
1383 
1384  procForm = (Form_pg_proc) GETSTRUCT(tup);
1385 
1386  /* Permission check: must own function */
1387  if (!pg_proc_ownercheck(funcOid, GetUserId()))
1389  NameListToString(stmt->func->objname));
1390 
1391  if (procForm->prokind == PROKIND_AGGREGATE)
1392  ereport(ERROR,
1393  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1394  errmsg("\"%s\" is an aggregate function",
1395  NameListToString(stmt->func->objname))));
1396 
1397  is_procedure = (procForm->prokind == PROKIND_PROCEDURE);
1398 
1399  /* Examine requested actions. */
1400  foreach(l, stmt->actions)
1401  {
1402  DefElem *defel = (DefElem *) lfirst(l);
1403 
1404  if (compute_common_attribute(pstate,
1405  is_procedure,
1406  defel,
1407  &volatility_item,
1408  &strict_item,
1409  &security_def_item,
1410  &leakproof_item,
1411  &set_items,
1412  &cost_item,
1413  &rows_item,
1414  &support_item,
1415  &parallel_item) == false)
1416  elog(ERROR, "option \"%s\" not recognized", defel->defname);
1417  }
1418 
1419  if (volatility_item)
1420  procForm->provolatile = interpret_func_volatility(volatility_item);
1421  if (strict_item)
1422  procForm->proisstrict = boolVal(strict_item->arg);
1423  if (security_def_item)
1424  procForm->prosecdef = boolVal(security_def_item->arg);
1425  if (leakproof_item)
1426  {
1427  procForm->proleakproof = boolVal(leakproof_item->arg);
1428  if (procForm->proleakproof && !superuser())
1429  ereport(ERROR,
1430  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
1431  errmsg("only superuser can define a leakproof function")));
1432  }
1433  if (cost_item)
1434  {
1435  procForm->procost = defGetNumeric(cost_item);
1436  if (procForm->procost <= 0)
1437  ereport(ERROR,
1438  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1439  errmsg("COST must be positive")));
1440  }
1441  if (rows_item)
1442  {
1443  procForm->prorows = defGetNumeric(rows_item);
1444  if (procForm->prorows <= 0)
1445  ereport(ERROR,
1446  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1447  errmsg("ROWS must be positive")));
1448  if (!procForm->proretset)
1449  ereport(ERROR,
1450  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1451  errmsg("ROWS is not applicable when function does not return a set")));
1452  }
1453  if (support_item)
1454  {
1455  /* interpret_func_support handles the privilege check */
1456  Oid newsupport = interpret_func_support(support_item);
1457 
1458  /* Add or replace dependency on support function */
1459  if (OidIsValid(procForm->prosupport))
1460  changeDependencyFor(ProcedureRelationId, funcOid,
1461  ProcedureRelationId, procForm->prosupport,
1462  newsupport);
1463  else
1464  {
1465  ObjectAddress referenced;
1466 
1467  referenced.classId = ProcedureRelationId;
1468  referenced.objectId = newsupport;
1469  referenced.objectSubId = 0;
1470  recordDependencyOn(&address, &referenced, DEPENDENCY_NORMAL);
1471  }
1472 
1473  procForm->prosupport = newsupport;
1474  }
1475  if (parallel_item)
1476  procForm->proparallel = interpret_func_parallel(parallel_item);
1477  if (set_items)
1478  {
1479  Datum datum;
1480  bool isnull;
1481  ArrayType *a;
1482  Datum repl_val[Natts_pg_proc];
1483  bool repl_null[Natts_pg_proc];
1484  bool repl_repl[Natts_pg_proc];
1485 
1486  /* extract existing proconfig setting */
1487  datum = SysCacheGetAttr(PROCOID, tup, Anum_pg_proc_proconfig, &isnull);
1488  a = isnull ? NULL : DatumGetArrayTypeP(datum);
1489 
1490  /* update according to each SET or RESET item, left to right */
1491  a = update_proconfig_value(a, set_items);
1492 
1493  /* update the tuple */
1494  memset(repl_repl, false, sizeof(repl_repl));
1495  repl_repl[Anum_pg_proc_proconfig - 1] = true;
1496 
1497  if (a == NULL)
1498  {
1499  repl_val[Anum_pg_proc_proconfig - 1] = (Datum) 0;
1500  repl_null[Anum_pg_proc_proconfig - 1] = true;
1501  }
1502  else
1503  {
1504  repl_val[Anum_pg_proc_proconfig - 1] = PointerGetDatum(a);
1505  repl_null[Anum_pg_proc_proconfig - 1] = false;
1506  }
1507 
1508  tup = heap_modify_tuple(tup, RelationGetDescr(rel),
1509  repl_val, repl_null, repl_repl);
1510  }
1511  /* DO NOT put more touches of procForm below here; it's now dangling. */
1512 
1513  /* Do the update */
1514  CatalogTupleUpdate(rel, &tup->t_self, tup);
1515 
1516  InvokeObjectPostAlterHook(ProcedureRelationId, funcOid, 0);
1517 
1518  table_close(rel, NoLock);
1519  heap_freetuple(tup);
1520 
1521  return address;
1522 }
1523 
1524 
1525 /*
1526  * CREATE CAST
1527  */
1530 {
1531  Oid sourcetypeid;
1532  Oid targettypeid;
1533  char sourcetyptype;
1534  char targettyptype;
1535  Oid funcid;
1536  int nargs;
1537  char castcontext;
1538  char castmethod;
1539  HeapTuple tuple;
1540  AclResult aclresult;
1541  ObjectAddress myself;
1542 
1543  sourcetypeid = typenameTypeId(NULL, stmt->sourcetype);
1544  targettypeid = typenameTypeId(NULL, stmt->targettype);
1545  sourcetyptype = get_typtype(sourcetypeid);
1546  targettyptype = get_typtype(targettypeid);
1547 
1548  /* No pseudo-types allowed */
1549  if (sourcetyptype == TYPTYPE_PSEUDO)
1550  ereport(ERROR,
1551  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1552  errmsg("source data type %s is a pseudo-type",
1553  TypeNameToString(stmt->sourcetype))));
1554 
1555  if (targettyptype == TYPTYPE_PSEUDO)
1556  ereport(ERROR,
1557  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1558  errmsg("target data type %s is a pseudo-type",
1559  TypeNameToString(stmt->targettype))));
1560 
1561  /* Permission check */
1562  if (!pg_type_ownercheck(sourcetypeid, GetUserId())
1563  && !pg_type_ownercheck(targettypeid, GetUserId()))
1564  ereport(ERROR,
1565  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
1566  errmsg("must be owner of type %s or type %s",
1567  format_type_be(sourcetypeid),
1568  format_type_be(targettypeid))));
1569 
1570  aclresult = pg_type_aclcheck(sourcetypeid, GetUserId(), ACL_USAGE);
1571  if (aclresult != ACLCHECK_OK)
1572  aclcheck_error_type(aclresult, sourcetypeid);
1573 
1574  aclresult = pg_type_aclcheck(targettypeid, GetUserId(), ACL_USAGE);
1575  if (aclresult != ACLCHECK_OK)
1576  aclcheck_error_type(aclresult, targettypeid);
1577 
1578  /* Domains are allowed for historical reasons, but we warn */
1579  if (sourcetyptype == TYPTYPE_DOMAIN)
1580  ereport(WARNING,
1581  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1582  errmsg("cast will be ignored because the source data type is a domain")));
1583 
1584  else if (targettyptype == TYPTYPE_DOMAIN)
1585  ereport(WARNING,
1586  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1587  errmsg("cast will be ignored because the target data type is a domain")));
1588 
1589  /* Determine the cast method */
1590  if (stmt->func != NULL)
1591  castmethod = COERCION_METHOD_FUNCTION;
1592  else if (stmt->inout)
1593  castmethod = COERCION_METHOD_INOUT;
1594  else
1595  castmethod = COERCION_METHOD_BINARY;
1596 
1597  if (castmethod == COERCION_METHOD_FUNCTION)
1598  {
1599  Form_pg_proc procstruct;
1600 
1601  funcid = LookupFuncWithArgs(OBJECT_FUNCTION, stmt->func, false);
1602 
1603  tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcid));
1604  if (!HeapTupleIsValid(tuple))
1605  elog(ERROR, "cache lookup failed for function %u", funcid);
1606 
1607  procstruct = (Form_pg_proc) GETSTRUCT(tuple);
1608  nargs = procstruct->pronargs;
1609  if (nargs < 1 || nargs > 3)
1610  ereport(ERROR,
1611  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1612  errmsg("cast function must take one to three arguments")));
1613  if (!IsBinaryCoercible(sourcetypeid, procstruct->proargtypes.values[0]))
1614  ereport(ERROR,
1615  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1616  errmsg("argument of cast function must match or be binary-coercible from source data type")));
1617  if (nargs > 1 && procstruct->proargtypes.values[1] != INT4OID)
1618  ereport(ERROR,
1619  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1620  errmsg("second argument of cast function must be type %s",
1621  "integer")));
1622  if (nargs > 2 && procstruct->proargtypes.values[2] != BOOLOID)
1623  ereport(ERROR,
1624  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1625  errmsg("third argument of cast function must be type %s",
1626  "boolean")));
1627  if (!IsBinaryCoercible(procstruct->prorettype, targettypeid))
1628  ereport(ERROR,
1629  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1630  errmsg("return data type of cast function must match or be binary-coercible to target data type")));
1631 
1632  /*
1633  * Restricting the volatility of a cast function may or may not be a
1634  * good idea in the abstract, but it definitely breaks many old
1635  * user-defined types. Disable this check --- tgl 2/1/03
1636  */
1637 #ifdef NOT_USED
1638  if (procstruct->provolatile == PROVOLATILE_VOLATILE)
1639  ereport(ERROR,
1640  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1641  errmsg("cast function must not be volatile")));
1642 #endif
1643  if (procstruct->prokind != PROKIND_FUNCTION)
1644  ereport(ERROR,
1645  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1646  errmsg("cast function must be a normal function")));
1647  if (procstruct->proretset)
1648  ereport(ERROR,
1649  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1650  errmsg("cast function must not return a set")));
1651 
1652  ReleaseSysCache(tuple);
1653  }
1654  else
1655  {
1656  funcid = InvalidOid;
1657  nargs = 0;
1658  }
1659 
1660  if (castmethod == COERCION_METHOD_BINARY)
1661  {
1662  int16 typ1len;
1663  int16 typ2len;
1664  bool typ1byval;
1665  bool typ2byval;
1666  char typ1align;
1667  char typ2align;
1668 
1669  /*
1670  * Must be superuser to create binary-compatible casts, since
1671  * erroneous casts can easily crash the backend.
1672  */
1673  if (!superuser())
1674  ereport(ERROR,
1675  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
1676  errmsg("must be superuser to create a cast WITHOUT FUNCTION")));
1677 
1678  /*
1679  * Also, insist that the types match as to size, alignment, and
1680  * pass-by-value attributes; this provides at least a crude check that
1681  * they have similar representations. A pair of types that fail this
1682  * test should certainly not be equated.
1683  */
1684  get_typlenbyvalalign(sourcetypeid, &typ1len, &typ1byval, &typ1align);
1685  get_typlenbyvalalign(targettypeid, &typ2len, &typ2byval, &typ2align);
1686  if (typ1len != typ2len ||
1687  typ1byval != typ2byval ||
1688  typ1align != typ2align)
1689  ereport(ERROR,
1690  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1691  errmsg("source and target data types are not physically compatible")));
1692 
1693  /*
1694  * We know that composite, enum and array types are never binary-
1695  * compatible with each other. They all have OIDs embedded in them.
1696  *
1697  * Theoretically you could build a user-defined base type that is
1698  * binary-compatible with a composite, enum, or array type. But we
1699  * disallow that too, as in practice such a cast is surely a mistake.
1700  * You can always work around that by writing a cast function.
1701  */
1702  if (sourcetyptype == TYPTYPE_COMPOSITE ||
1703  targettyptype == TYPTYPE_COMPOSITE)
1704  ereport(ERROR,
1705  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1706  errmsg("composite data types are not binary-compatible")));
1707 
1708  if (sourcetyptype == TYPTYPE_ENUM ||
1709  targettyptype == TYPTYPE_ENUM)
1710  ereport(ERROR,
1711  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1712  errmsg("enum data types are not binary-compatible")));
1713 
1714  if (OidIsValid(get_element_type(sourcetypeid)) ||
1715  OidIsValid(get_element_type(targettypeid)))
1716  ereport(ERROR,
1717  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1718  errmsg("array data types are not binary-compatible")));
1719 
1720  /*
1721  * We also disallow creating binary-compatibility casts involving
1722  * domains. Casting from a domain to its base type is already
1723  * allowed, and casting the other way ought to go through domain
1724  * coercion to permit constraint checking. Again, if you're intent on
1725  * having your own semantics for that, create a no-op cast function.
1726  *
1727  * NOTE: if we were to relax this, the above checks for composites
1728  * etc. would have to be modified to look through domains to their
1729  * base types.
1730  */
1731  if (sourcetyptype == TYPTYPE_DOMAIN ||
1732  targettyptype == TYPTYPE_DOMAIN)
1733  ereport(ERROR,
1734  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1735  errmsg("domain data types must not be marked binary-compatible")));
1736  }
1737 
1738  /*
1739  * Allow source and target types to be same only for length coercion
1740  * functions. We assume a multi-arg function does length coercion.
1741  */
1742  if (sourcetypeid == targettypeid && nargs < 2)
1743  ereport(ERROR,
1744  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1745  errmsg("source data type and target data type are the same")));
1746 
1747  /* convert CoercionContext enum to char value for castcontext */
1748  switch (stmt->context)
1749  {
1750  case COERCION_IMPLICIT:
1751  castcontext = COERCION_CODE_IMPLICIT;
1752  break;
1753  case COERCION_ASSIGNMENT:
1754  castcontext = COERCION_CODE_ASSIGNMENT;
1755  break;
1756  /* COERCION_PLPGSQL is intentionally not covered here */
1757  case COERCION_EXPLICIT:
1758  castcontext = COERCION_CODE_EXPLICIT;
1759  break;
1760  default:
1761  elog(ERROR, "unrecognized CoercionContext: %d", stmt->context);
1762  castcontext = 0; /* keep compiler quiet */
1763  break;
1764  }
1765 
1766  myself = CastCreate(sourcetypeid, targettypeid, funcid, castcontext,
1767  castmethod, DEPENDENCY_NORMAL);
1768  return myself;
1769 }
1770 
1771 
1772 static void
1774 {
1775  if (procstruct->provolatile == PROVOLATILE_VOLATILE)
1776  ereport(ERROR,
1777  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1778  errmsg("transform function must not be volatile")));
1779  if (procstruct->prokind != PROKIND_FUNCTION)
1780  ereport(ERROR,
1781  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1782  errmsg("transform function must be a normal function")));
1783  if (procstruct->proretset)
1784  ereport(ERROR,
1785  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1786  errmsg("transform function must not return a set")));
1787  if (procstruct->pronargs != 1)
1788  ereport(ERROR,
1789  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1790  errmsg("transform function must take one argument")));
1791  if (procstruct->proargtypes.values[0] != INTERNALOID)
1792  ereport(ERROR,
1793  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1794  errmsg("first argument of transform function must be type %s",
1795  "internal")));
1796 }
1797 
1798 
1799 /*
1800  * CREATE TRANSFORM
1801  */
1804 {
1805  Oid typeid;
1806  char typtype;
1807  Oid langid;
1808  Oid fromsqlfuncid;
1809  Oid tosqlfuncid;
1810  AclResult aclresult;
1811  Form_pg_proc procstruct;
1812  Datum values[Natts_pg_transform];
1813  bool nulls[Natts_pg_transform];
1814  bool replaces[Natts_pg_transform];
1815  Oid transformid;
1816  HeapTuple tuple;
1817  HeapTuple newtuple;
1818  Relation relation;
1819  ObjectAddress myself,
1820  referenced;
1821  ObjectAddresses *addrs;
1822  bool is_replace;
1823 
1824  /*
1825  * Get the type
1826  */
1827  typeid = typenameTypeId(NULL, stmt->type_name);
1828  typtype = get_typtype(typeid);
1829 
1830  if (typtype == TYPTYPE_PSEUDO)
1831  ereport(ERROR,
1832  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1833  errmsg("data type %s is a pseudo-type",
1834  TypeNameToString(stmt->type_name))));
1835 
1836  if (typtype == TYPTYPE_DOMAIN)
1837  ereport(ERROR,
1838  (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1839  errmsg("data type %s is a domain",
1840  TypeNameToString(stmt->type_name))));
1841 
1842  if (!pg_type_ownercheck(typeid, GetUserId()))
1844 
1845  aclresult = pg_type_aclcheck(typeid, GetUserId(), ACL_USAGE);
1846  if (aclresult != ACLCHECK_OK)
1847  aclcheck_error_type(aclresult, typeid);
1848 
1849  /*
1850  * Get the language
1851  */
1852  langid = get_language_oid(stmt->lang, false);
1853 
1854  aclresult = pg_language_aclcheck(langid, GetUserId(), ACL_USAGE);
1855  if (aclresult != ACLCHECK_OK)
1856  aclcheck_error(aclresult, OBJECT_LANGUAGE, stmt->lang);
1857 
1858  /*
1859  * Get the functions
1860  */
1861  if (stmt->fromsql)
1862  {
1863  fromsqlfuncid = LookupFuncWithArgs(OBJECT_FUNCTION, stmt->fromsql, false);
1864 
1865  if (!pg_proc_ownercheck(fromsqlfuncid, GetUserId()))
1867 
1868  aclresult = pg_proc_aclcheck(fromsqlfuncid, GetUserId(), ACL_EXECUTE);
1869  if (aclresult != ACLCHECK_OK)
1871 
1872  tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(fromsqlfuncid));
1873  if (!HeapTupleIsValid(tuple))
1874  elog(ERROR, "cache lookup failed for function %u", fromsqlfuncid);
1875  procstruct = (Form_pg_proc) GETSTRUCT(tuple);
1876  if (procstruct->prorettype != INTERNALOID)
1877  ereport(ERROR,
1878  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1879  errmsg("return data type of FROM SQL function must be %s",
1880  "internal")));
1881  check_transform_function(procstruct);
1882  ReleaseSysCache(tuple);
1883  }
1884  else
1885  fromsqlfuncid = InvalidOid;
1886 
1887  if (stmt->tosql)
1888  {
1889  tosqlfuncid = LookupFuncWithArgs(OBJECT_FUNCTION, stmt->tosql, false);
1890 
1891  if (!pg_proc_ownercheck(tosqlfuncid, GetUserId()))
1893 
1894  aclresult = pg_proc_aclcheck(tosqlfuncid, GetUserId(), ACL_EXECUTE);
1895  if (aclresult != ACLCHECK_OK)
1897 
1898  tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(tosqlfuncid));
1899  if (!HeapTupleIsValid(tuple))
1900  elog(ERROR, "cache lookup failed for function %u", tosqlfuncid);
1901  procstruct = (Form_pg_proc) GETSTRUCT(tuple);
1902  if (procstruct->prorettype != typeid)
1903  ereport(ERROR,
1904  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1905  errmsg("return data type of TO SQL function must be the transform data type")));
1906  check_transform_function(procstruct);
1907  ReleaseSysCache(tuple);
1908  }
1909  else
1910  tosqlfuncid = InvalidOid;
1911 
1912  /*
1913  * Ready to go
1914  */
1915  values[Anum_pg_transform_trftype - 1] = ObjectIdGetDatum(typeid);
1916  values[Anum_pg_transform_trflang - 1] = ObjectIdGetDatum(langid);
1917  values[Anum_pg_transform_trffromsql - 1] = ObjectIdGetDatum(fromsqlfuncid);
1918  values[Anum_pg_transform_trftosql - 1] = ObjectIdGetDatum(tosqlfuncid);
1919 
1920  MemSet(nulls, false, sizeof(nulls));
1921 
1922  relation = table_open(TransformRelationId, RowExclusiveLock);
1923 
1924  tuple = SearchSysCache2(TRFTYPELANG,
1925  ObjectIdGetDatum(typeid),
1926  ObjectIdGetDatum(langid));
1927  if (HeapTupleIsValid(tuple))
1928  {
1930 
1931  if (!stmt->replace)
1932  ereport(ERROR,
1934  errmsg("transform for type %s language \"%s\" already exists",
1935  format_type_be(typeid),
1936  stmt->lang)));
1937 
1938  MemSet(replaces, false, sizeof(replaces));
1939  replaces[Anum_pg_transform_trffromsql - 1] = true;
1940  replaces[Anum_pg_transform_trftosql - 1] = true;
1941 
1942  newtuple = heap_modify_tuple(tuple, RelationGetDescr(relation), values, nulls, replaces);
1943  CatalogTupleUpdate(relation, &newtuple->t_self, newtuple);
1944 
1945  transformid = form->oid;
1946  ReleaseSysCache(tuple);
1947  is_replace = true;
1948  }
1949  else
1950  {
1951  transformid = GetNewOidWithIndex(relation, TransformOidIndexId,
1952  Anum_pg_transform_oid);
1953  values[Anum_pg_transform_oid - 1] = ObjectIdGetDatum(transformid);
1954  newtuple = heap_form_tuple(RelationGetDescr(relation), values, nulls);
1955  CatalogTupleInsert(relation, newtuple);
1956  is_replace = false;
1957  }
1958 
1959  if (is_replace)
1960  deleteDependencyRecordsFor(TransformRelationId, transformid, true);
1961 
1962  addrs = new_object_addresses();
1963 
1964  /* make dependency entries */
1965  ObjectAddressSet(myself, TransformRelationId, transformid);
1966 
1967  /* dependency on language */
1968  ObjectAddressSet(referenced, LanguageRelationId, langid);
1969  add_exact_object_address(&referenced, addrs);
1970 
1971  /* dependency on type */
1972  ObjectAddressSet(referenced, TypeRelationId, typeid);
1973  add_exact_object_address(&referenced, addrs);
1974 
1975  /* dependencies on functions */
1976  if (OidIsValid(fromsqlfuncid))
1977  {
1978  ObjectAddressSet(referenced, ProcedureRelationId, fromsqlfuncid);
1979  add_exact_object_address(&referenced, addrs);
1980  }
1981  if (OidIsValid(tosqlfuncid))
1982  {
1983  ObjectAddressSet(referenced, ProcedureRelationId, tosqlfuncid);
1984  add_exact_object_address(&referenced, addrs);
1985  }
1986 
1988  free_object_addresses(addrs);
1989 
1990  /* dependency on extension */
1991  recordDependencyOnCurrentExtension(&myself, is_replace);
1992 
1993  /* Post creation hook for new transform */
1994  InvokeObjectPostCreateHook(TransformRelationId, transformid, 0);
1995 
1996  heap_freetuple(newtuple);
1997 
1998  table_close(relation, RowExclusiveLock);
1999 
2000  return myself;
2001 }
2002 
2003 
2004 /*
2005  * get_transform_oid - given type OID and language OID, look up a transform OID
2006  *
2007  * If missing_ok is false, throw an error if the transform is not found. If
2008  * true, just return InvalidOid.
2009  */
2010 Oid
2011 get_transform_oid(Oid type_id, Oid lang_id, bool missing_ok)
2012 {
2013  Oid oid;
2014 
2015  oid = GetSysCacheOid2(TRFTYPELANG, Anum_pg_transform_oid,
2016  ObjectIdGetDatum(type_id),
2017  ObjectIdGetDatum(lang_id));
2018  if (!OidIsValid(oid) && !missing_ok)
2019  ereport(ERROR,
2020  (errcode(ERRCODE_UNDEFINED_OBJECT),
2021  errmsg("transform for type %s language \"%s\" does not exist",
2022  format_type_be(type_id),
2023  get_language_name(lang_id, false))));
2024  return oid;
2025 }
2026 
2027 
2028 /*
2029  * Subroutine for ALTER FUNCTION/AGGREGATE SET SCHEMA/RENAME
2030  *
2031  * Is there a function with the given name and signature already in the given
2032  * namespace? If so, raise an appropriate error message.
2033  */
2034 void
2036  oidvector *proargtypes, Oid nspOid)
2037 {
2038  /* check for duplicate name (more friendly than unique-index failure) */
2041  PointerGetDatum(proargtypes),
2042  ObjectIdGetDatum(nspOid)))
2043  ereport(ERROR,
2044  (errcode(ERRCODE_DUPLICATE_FUNCTION),
2045  errmsg("function %s already exists in schema \"%s\"",
2047  NIL, proargtypes->values),
2048  get_namespace_name(nspOid))));
2049 }
2050 
2051 /*
2052  * ExecuteDoStmt
2053  * Execute inline procedural-language code
2054  *
2055  * See at ExecuteCallStmt() about the atomic argument.
2056  */
2057 void
2058 ExecuteDoStmt(ParseState *pstate, DoStmt *stmt, bool atomic)
2059 {
2061  ListCell *arg;
2062  DefElem *as_item = NULL;
2063  DefElem *language_item = NULL;
2064  char *language;
2065  Oid laninline;
2066  HeapTuple languageTuple;
2067  Form_pg_language languageStruct;
2068 
2069  /* Process options we got from gram.y */
2070  foreach(arg, stmt->args)
2071  {
2072  DefElem *defel = (DefElem *) lfirst(arg);
2073 
2074  if (strcmp(defel->defname, "as") == 0)
2075  {
2076  if (as_item)
2077  errorConflictingDefElem(defel, pstate);
2078  as_item = defel;
2079  }
2080  else if (strcmp(defel->defname, "language") == 0)
2081  {
2082  if (language_item)
2083  errorConflictingDefElem(defel, pstate);
2084  language_item = defel;
2085  }
2086  else
2087  elog(ERROR, "option \"%s\" not recognized",
2088  defel->defname);
2089  }
2090 
2091  if (as_item)
2092  codeblock->source_text = strVal(as_item->arg);
2093  else
2094  ereport(ERROR,
2095  (errcode(ERRCODE_SYNTAX_ERROR),
2096  errmsg("no inline code specified")));
2097 
2098  /* if LANGUAGE option wasn't specified, use the default */
2099  if (language_item)
2100  language = strVal(language_item->arg);
2101  else
2102  language = "plpgsql";
2103 
2104  /* Look up the language and validate permissions */
2105  languageTuple = SearchSysCache1(LANGNAME, PointerGetDatum(language));
2106  if (!HeapTupleIsValid(languageTuple))
2107  ereport(ERROR,
2108  (errcode(ERRCODE_UNDEFINED_OBJECT),
2109  errmsg("language \"%s\" does not exist", language),
2110  (extension_file_exists(language) ?
2111  errhint("Use CREATE EXTENSION to load the language into the database.") : 0)));
2112 
2113  languageStruct = (Form_pg_language) GETSTRUCT(languageTuple);
2114  codeblock->langOid = languageStruct->oid;
2115  codeblock->langIsTrusted = languageStruct->lanpltrusted;
2116  codeblock->atomic = atomic;
2117 
2118  if (languageStruct->lanpltrusted)
2119  {
2120  /* if trusted language, need USAGE privilege */
2121  AclResult aclresult;
2122 
2123  aclresult = pg_language_aclcheck(codeblock->langOid, GetUserId(),
2124  ACL_USAGE);
2125  if (aclresult != ACLCHECK_OK)
2126  aclcheck_error(aclresult, OBJECT_LANGUAGE,
2127  NameStr(languageStruct->lanname));
2128  }
2129  else
2130  {
2131  /* if untrusted language, must be superuser */
2132  if (!superuser())
2134  NameStr(languageStruct->lanname));
2135  }
2136 
2137  /* get the handler function's OID */
2138  laninline = languageStruct->laninline;
2139  if (!OidIsValid(laninline))
2140  ereport(ERROR,
2141  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2142  errmsg("language \"%s\" does not support inline code execution",
2143  NameStr(languageStruct->lanname))));
2144 
2145  ReleaseSysCache(languageTuple);
2146 
2147  /* execute the inline handler */
2148  OidFunctionCall1(laninline, PointerGetDatum(codeblock));
2149 }
2150 
2151 /*
2152  * Execute CALL statement
2153  *
2154  * Inside a top-level CALL statement, transaction-terminating commands such as
2155  * COMMIT or a PL-specific equivalent are allowed. The terminology in the SQL
2156  * standard is that CALL establishes a non-atomic execution context. Most
2157  * other commands establish an atomic execution context, in which transaction
2158  * control actions are not allowed. If there are nested executions of CALL,
2159  * we want to track the execution context recursively, so that the nested
2160  * CALLs can also do transaction control. Note, however, that for example in
2161  * CALL -> SELECT -> CALL, the second call cannot do transaction control,
2162  * because the SELECT in between establishes an atomic execution context.
2163  *
2164  * So when ExecuteCallStmt() is called from the top level, we pass in atomic =
2165  * false (recall that that means transactions = yes). We then create a
2166  * CallContext node with content atomic = false, which is passed in the
2167  * fcinfo->context field to the procedure invocation. The language
2168  * implementation should then take appropriate measures to allow or prevent
2169  * transaction commands based on that information, e.g., call
2170  * SPI_connect_ext(SPI_OPT_NONATOMIC). The language should also pass on the
2171  * atomic flag to any nested invocations to CALL.
2172  *
2173  * The expression data structures and execution context that we create
2174  * within this function are children of the portalContext of the Portal
2175  * that the CALL utility statement runs in. Therefore, any pass-by-ref
2176  * values that we're passing to the procedure will survive transaction
2177  * commits that might occur inside the procedure.
2178  */
2179 void
2181 {
2182  LOCAL_FCINFO(fcinfo, FUNC_MAX_ARGS);
2183  ListCell *lc;
2184  FuncExpr *fexpr;
2185  int nargs;
2186  int i;
2187  AclResult aclresult;
2188  FmgrInfo flinfo;
2189  CallContext *callcontext;
2190  EState *estate;
2191  ExprContext *econtext;
2192  HeapTuple tp;
2193  PgStat_FunctionCallUsage fcusage;
2194  Datum retval;
2195 
2196  fexpr = stmt->funcexpr;
2197  Assert(fexpr);
2198  Assert(IsA(fexpr, FuncExpr));
2199 
2200  aclresult = pg_proc_aclcheck(fexpr->funcid, GetUserId(), ACL_EXECUTE);
2201  if (aclresult != ACLCHECK_OK)
2202  aclcheck_error(aclresult, OBJECT_PROCEDURE, get_func_name(fexpr->funcid));
2203 
2204  /* Prep the context object we'll pass to the procedure */
2205  callcontext = makeNode(CallContext);
2206  callcontext->atomic = atomic;
2207 
2209  if (!HeapTupleIsValid(tp))
2210  elog(ERROR, "cache lookup failed for function %u", fexpr->funcid);
2211 
2212  /*
2213  * If proconfig is set we can't allow transaction commands because of the
2214  * way the GUC stacking works: The transaction boundary would have to pop
2215  * the proconfig setting off the stack. That restriction could be lifted
2216  * by redesigning the GUC nesting mechanism a bit.
2217  */
2218  if (!heap_attisnull(tp, Anum_pg_proc_proconfig, NULL))
2219  callcontext->atomic = true;
2220 
2221  /*
2222  * In security definer procedures, we can't allow transaction commands.
2223  * StartTransaction() insists that the security context stack is empty,
2224  * and AbortTransaction() resets the security context. This could be
2225  * reorganized, but right now it doesn't work.
2226  */
2227  if (((Form_pg_proc) GETSTRUCT(tp))->prosecdef)
2228  callcontext->atomic = true;
2229 
2230  ReleaseSysCache(tp);
2231 
2232  /* safety check; see ExecInitFunc() */
2233  nargs = list_length(fexpr->args);
2234  if (nargs > FUNC_MAX_ARGS)
2235  ereport(ERROR,
2236  (errcode(ERRCODE_TOO_MANY_ARGUMENTS),
2237  errmsg_plural("cannot pass more than %d argument to a procedure",
2238  "cannot pass more than %d arguments to a procedure",
2239  FUNC_MAX_ARGS,
2240  FUNC_MAX_ARGS)));
2241 
2242  /* Initialize function call structure */
2244  fmgr_info(fexpr->funcid, &flinfo);
2245  fmgr_info_set_expr((Node *) fexpr, &flinfo);
2246  InitFunctionCallInfoData(*fcinfo, &flinfo, nargs, fexpr->inputcollid,
2247  (Node *) callcontext, NULL);
2248 
2249  /*
2250  * Evaluate procedure arguments inside a suitable execution context. Note
2251  * we can't free this context till the procedure returns.
2252  */
2253  estate = CreateExecutorState();
2254  estate->es_param_list_info = params;
2255  econtext = CreateExprContext(estate);
2256 
2257  /*
2258  * If we're called in non-atomic context, we also have to ensure that the
2259  * argument expressions run with an up-to-date snapshot. Our caller will
2260  * have provided a current snapshot in atomic contexts, but not in
2261  * non-atomic contexts, because the possibility of a COMMIT/ROLLBACK
2262  * destroying the snapshot makes higher-level management too complicated.
2263  */
2264  if (!atomic)
2266 
2267  i = 0;
2268  foreach(lc, fexpr->args)
2269  {
2270  ExprState *exprstate;
2271  Datum val;
2272  bool isnull;
2273 
2274  exprstate = ExecPrepareExpr(lfirst(lc), estate);
2275 
2276  val = ExecEvalExprSwitchContext(exprstate, econtext, &isnull);
2277 
2278  fcinfo->args[i].value = val;
2279  fcinfo->args[i].isnull = isnull;
2280 
2281  i++;
2282  }
2283 
2284  /* Get rid of temporary snapshot for arguments, if we made one */
2285  if (!atomic)
2287 
2288  /* Here we actually call the procedure */
2289  pgstat_init_function_usage(fcinfo, &fcusage);
2290  retval = FunctionCallInvoke(fcinfo);
2291  pgstat_end_function_usage(&fcusage, true);
2292 
2293  /* Handle the procedure's outputs */
2294  if (fexpr->funcresulttype == VOIDOID)
2295  {
2296  /* do nothing */
2297  }
2298  else if (fexpr->funcresulttype == RECORDOID)
2299  {
2300  /* send tuple to client */
2301  HeapTupleHeader td;
2302  Oid tupType;
2303  int32 tupTypmod;
2304  TupleDesc retdesc;
2305  HeapTupleData rettupdata;
2306  TupOutputState *tstate;
2307  TupleTableSlot *slot;
2308 
2309  if (fcinfo->isnull)
2310  elog(ERROR, "procedure returned null record");
2311 
2312  /*
2313  * Ensure there's an active snapshot whilst we execute whatever's
2314  * involved here. Note that this is *not* sufficient to make the
2315  * world safe for TOAST pointers to be included in the returned data:
2316  * the referenced data could have gone away while we didn't hold a
2317  * snapshot. Hence, it's incumbent on PLs that can do COMMIT/ROLLBACK
2318  * to not return TOAST pointers, unless those pointers were fetched
2319  * after the last COMMIT/ROLLBACK in the procedure.
2320  *
2321  * XXX that is a really nasty, hard-to-test requirement. Is there a
2322  * way to remove it?
2323  */
2325 
2326  td = DatumGetHeapTupleHeader(retval);
2327  tupType = HeapTupleHeaderGetTypeId(td);
2328  tupTypmod = HeapTupleHeaderGetTypMod(td);
2329  retdesc = lookup_rowtype_tupdesc(tupType, tupTypmod);
2330 
2331  tstate = begin_tup_output_tupdesc(dest, retdesc,
2332  &TTSOpsHeapTuple);
2333 
2334  rettupdata.t_len = HeapTupleHeaderGetDatumLength(td);
2335  ItemPointerSetInvalid(&(rettupdata.t_self));
2336  rettupdata.t_tableOid = InvalidOid;
2337  rettupdata.t_data = td;
2338 
2339  slot = ExecStoreHeapTuple(&rettupdata, tstate->slot, false);
2340  tstate->dest->receiveSlot(slot, tstate->dest);
2341 
2342  end_tup_output(tstate);
2343 
2344  ReleaseTupleDesc(retdesc);
2345  }
2346  else
2347  elog(ERROR, "unexpected result type for procedure: %u",
2348  fexpr->funcresulttype);
2349 
2350  FreeExecutorState(estate);
2351 }
2352 
2353 /*
2354  * Construct the tuple descriptor for a CALL statement return
2355  */
2356 TupleDesc
2358 {
2359  FuncExpr *fexpr;
2360  HeapTuple tuple;
2361  TupleDesc tupdesc;
2362 
2363  fexpr = stmt->funcexpr;
2364 
2365  tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(fexpr->funcid));
2366  if (!HeapTupleIsValid(tuple))
2367  elog(ERROR, "cache lookup failed for procedure %u", fexpr->funcid);
2368 
2369  tupdesc = build_function_result_tupdesc_t(tuple);
2370 
2371  ReleaseSysCache(tuple);
2372 
2373  return tupdesc;
2374 }
AclResult
Definition: acl.h:181
@ ACLCHECK_NO_PRIV
Definition: acl.h:183
@ ACLCHECK_OK
Definition: acl.h:182
@ ACLCHECK_NOT_OWNER
Definition: acl.h:184
AclResult pg_language_aclcheck(Oid lang_oid, Oid roleid, AclMode mode)
Definition: aclchk.c:5083
AclResult pg_namespace_aclcheck(Oid nsp_oid, Oid roleid, AclMode mode)
Definition: aclchk.c:5109
bool pg_proc_ownercheck(Oid proc_oid, Oid roleid)
Definition: aclchk.c:5249
bool pg_type_ownercheck(Oid type_oid, Oid roleid)
Definition: aclchk.c:5197
AclResult pg_type_aclcheck(Oid type_oid, Oid roleid, AclMode mode)
Definition: aclchk.c:5159
void aclcheck_error(AclResult aclerr, ObjectType objtype, const char *objectname)
Definition: aclchk.c:3512
AclResult pg_proc_aclcheck(Oid proc_oid, Oid roleid, AclMode mode)
Definition: aclchk.c:5071
void aclcheck_error_type(AclResult aclerr, Oid typeOid)
Definition: aclchk.c:3831
#define DatumGetArrayTypeP(X)
Definition: array.h:254
ArrayType * construct_array(Datum *elems, int nelems, Oid elmtype, int elmlen, bool elmbyval, char elmalign)
Definition: arrayfuncs.c:3319
static Datum values[MAXATTR]
Definition: bootstrap.c:156
#define CStringGetTextDatum(s)
Definition: builtins.h:85
#define NameStr(name)
Definition: c.h:681
signed short int16
Definition: c.h:428
signed int int32
Definition: c.h:429
float float4
Definition: c.h:564
#define MemSet(start, val, len)
Definition: c.h:1008
#define OidIsValid(objectId)
Definition: c.h:710
Oid GetNewOidWithIndex(Relation relation, Oid indexId, AttrNumber oidcolumn)
Definition: catalog.c:391
const char * GetCommandTagName(CommandTag commandTag)
Definition: cmdtag.c:45
List * defGetQualifiedName(DefElem *def)
Definition: define.c:220
void errorConflictingDefElem(DefElem *defel, ParseState *pstate)
Definition: define.c:352
double defGetNumeric(DefElem *def)
Definition: define.c:82
void record_object_address_dependencies(const ObjectAddress *depender, ObjectAddresses *referenced, DependencyType behavior)
Definition: dependency.c:2711
ObjectAddresses * new_object_addresses(void)
Definition: dependency.c:2447
void add_exact_object_address(const ObjectAddress *object, ObjectAddresses *addrs)
Definition: dependency.c:2502
void free_object_addresses(ObjectAddresses *addrs)
Definition: dependency.c:2742
@ DEPENDENCY_NORMAL
Definition: dependency.h:33
int errmsg_plural(const char *fmt_singular, const char *fmt_plural, unsigned long n,...)
Definition: elog.c:1014
int errdetail(const char *fmt,...)
Definition: elog.c:1037
int errhint(const char *fmt,...)
Definition: elog.c:1151
int errcode(int sqlerrcode)
Definition: elog.c:693
int errmsg(const char *fmt,...)
Definition: elog.c:904
#define WARNING
Definition: elog.h:30
#define ERROR
Definition: elog.h:33
#define elog(elevel,...)
Definition: elog.h:218
#define NOTICE
Definition: elog.h:29
#define ereport(elevel,...)
Definition: elog.h:143
ExprState * ExecPrepareExpr(Expr *node, EState *estate)
Definition: execExpr.c:746
void end_tup_output(TupOutputState *tstate)
Definition: execTuples.c:2333
TupleTableSlot * ExecStoreHeapTuple(HeapTuple tuple, TupleTableSlot *slot, bool shouldFree)
Definition: execTuples.c:1352
const TupleTableSlotOps TTSOpsHeapTuple
Definition: execTuples.c:84
TupOutputState * begin_tup_output_tupdesc(DestReceiver *dest, TupleDesc tupdesc, const TupleTableSlotOps *tts_ops)
Definition: execTuples.c:2255
EState * CreateExecutorState(void)
Definition: execUtils.c:90
ExprContext * CreateExprContext(EState *estate)
Definition: execUtils.c:301
void FreeExecutorState(EState *estate)
Definition: execUtils.c:186
static Datum ExecEvalExprSwitchContext(ExprState *state, ExprContext *econtext, bool *isNull)
Definition: executor.h:335
bool extension_file_exists(const char *extensionName)
Definition: extension.c:2184
void fmgr_info(Oid functionId, FmgrInfo *finfo)
Definition: fmgr.c:126
#define OidFunctionCall1(functionId, arg1)
Definition: fmgr.h:669
#define DatumGetHeapTupleHeader(X)
Definition: fmgr.h:295
#define InitFunctionCallInfoData(Fcinfo, Flinfo, Nargs, Collation, Context, Resultinfo)
Definition: fmgr.h:150
#define LOCAL_FCINFO(name, nargs)
Definition: fmgr.h:110
#define FunctionCallInvoke(fcinfo)
Definition: fmgr.h:172
#define fmgr_info_set_expr(expr, finfo)
Definition: fmgr.h:135
char * format_type_be(Oid type_oid)
Definition: format_type.c:343
TupleDesc build_function_result_tupdesc_t(HeapTuple procTuple)
Definition: funcapi.c:1671
void ExecuteCallStmt(CallStmt *stmt, ParamListInfo params, bool atomic, DestReceiver *dest)
ObjectAddress CreateCast(CreateCastStmt *stmt)
static ArrayType * update_proconfig_value(ArrayType *a, List *set_items)
Definition: functioncmds.c:654
static void compute_return_type(TypeName *returnType, Oid languageOid, Oid *prorettype_p, bool *returnsSet_p)
Definition: functioncmds.c:93
static Oid interpret_func_support(DefElem *defel)
Definition: functioncmds.c:679
static void compute_function_attributes(ParseState *pstate, bool is_procedure, List *options, List **as, char **language, Node **transform, bool *windowfunc_p, char *volatility_p, bool *strict_p, bool *security_definer, bool *leakproof_p, ArrayType **proconfig, float4 *procost, float4 *prorows, Oid *prosupport, char *parallel_p)
Definition: functioncmds.c:723
void interpret_function_parameter_list(ParseState *pstate, List *parameters, Oid languageOid, ObjectType objtype, oidvector **parameterTypes, List **parameterTypes_list, ArrayType **allParameterTypes, ArrayType **parameterModes, ArrayType **parameterNames, List **inParameterNames_list, List **parameterDefaults, Oid *variadicArgType, Oid *requiredResultType)
Definition: functioncmds.c:189
static bool compute_common_attribute(ParseState *pstate, bool is_procedure, DefElem *defel, DefElem **volatility_item, DefElem **strict_item, DefElem **security_item, DefElem **leakproof_item, List **set_items, DefElem **cost_item, DefElem **rows_item, DefElem **support_item, DefElem **parallel_item)
Definition: functioncmds.c:509
static char interpret_func_volatility(DefElem *defel)
Definition: functioncmds.c:611
ObjectAddress CreateFunction(ParseState *pstate, CreateFunctionStmt *stmt)
void IsThereFunctionInNamespace(const char *proname, int pronargs, oidvector *proargtypes, Oid nspOid)
ObjectAddress AlterFunction(ParseState *pstate, AlterFunctionStmt *stmt)
TupleDesc CallStmtResultDesc(CallStmt *stmt)
static void interpret_AS_clause(Oid languageOid, const char *languageName, char *funcname, List *as, Node *sql_body_in, List *parameterTypes, List *inParameterNames, char **prosrc_str_p, char **probin_str_p, Node **sql_body_out, const char *queryString)
Definition: functioncmds.c:860
Oid get_transform_oid(Oid type_id, Oid lang_id, bool missing_ok)
void ExecuteDoStmt(ParseState *pstate, DoStmt *stmt, bool atomic)
static void check_transform_function(Form_pg_proc procstruct)
ObjectAddress CreateTransform(CreateTransformStmt *stmt)
void RemoveFunctionById(Oid funcOid)
static char interpret_func_parallel(DefElem *defel)
Definition: functioncmds.c:629
void sql_fn_parser_setup(struct ParseState *pstate, SQLFunctionParseInfoPtr pinfo)
Definition: functions.c:265
SQLFunctionParseInfo * SQLFunctionParseInfoPtr
Definition: functions.h:35
void px(PlannerInfo *root, Gene *tour1, Gene *tour2, Gene *offspring, int num_gene, City *city_table)
char * ExtractSetVariableArgs(VariableSetStmt *stmt)
Definition: guc.c:9144
ArrayType * GUCArrayAdd(ArrayType *array, const char *name, const char *value)
Definition: guc.c:11438
ArrayType * GUCArrayDelete(ArrayType *array, const char *name)
Definition: guc.c:11518
HeapTuple heap_form_tuple(TupleDesc tupleDescriptor, Datum *values, bool *isnull)
Definition: heaptuple.c:1020
HeapTuple heap_modify_tuple(HeapTuple tuple, TupleDesc tupleDesc, Datum *replValues, bool *replIsnull, bool *doReplace)
Definition: heaptuple.c:1113
bool heap_attisnull(HeapTuple tup, int attnum, TupleDesc tupleDesc)
Definition: heaptuple.c:359
void heap_freetuple(HeapTuple htup)
Definition: heaptuple.c:1338
#define HeapTupleIsValid(tuple)
Definition: htup.h:78
#define HeapTupleHeaderGetTypMod(tup)
Definition: htup_details.h:462
#define HeapTupleHeaderGetTypeId(tup)
Definition: htup_details.h:452
#define HeapTupleHeaderGetDatumLength(tup)
Definition: htup_details.h:446
#define GETSTRUCT(TUP)
Definition: htup_details.h:649
void CatalogTupleUpdate(Relation heapRel, ItemPointer otid, HeapTuple tup)
Definition: indexing.c:301
void CatalogTupleInsert(Relation heapRel, HeapTuple tup)
Definition: indexing.c:221
void CatalogTupleDelete(Relation heapRel, ItemPointer tid)
Definition: indexing.c:350
long val
Definition: informix.c:664
int x
Definition: isn.c:71
int a
Definition: isn.c:69
int i
Definition: isn.c:73
#define ItemPointerSetInvalid(pointer)
Definition: itemptr.h:172
Assert(fmt[strlen(fmt) - 1] !='\n')
List * lappend(List *list, void *datum)
Definition: list.c:336
List * lappend_oid(List *list, Oid datum)
Definition: list.c:372
#define NoLock
Definition: lockdefs.h:34
#define RowExclusiveLock
Definition: lockdefs.h:38
char * get_language_name(Oid langoid, bool missing_ok)
Definition: lsyscache.c:1164
Oid get_element_type(Oid typid)
Definition: lsyscache.c:2716
char * get_namespace_name(Oid nspid)
Definition: lsyscache.c:3326
void get_typlenbyvalalign(Oid typid, int16 *typlen, bool *typbyval, char *typalign)
Definition: lsyscache.c:2228
char * get_func_name(Oid funcid)
Definition: lsyscache.c:1589
char get_typtype(Oid typid)
Definition: lsyscache.c:2586
Oid get_base_element_type(Oid typid)
Definition: lsyscache.c:2789
Oid get_func_rettype(Oid funcid)
Definition: lsyscache.c:1636
char * pstrdup(const char *in)
Definition: mcxt.c:1305
void * palloc0(Size size)
Definition: mcxt.c:1099
void * palloc(Size size)
Definition: mcxt.c:1068
Oid GetUserId(void)
Definition: miscinit.c:492
Oid QualifiedNameGetCreationNamespace(List *names, char **objname_p)
Definition: namespace.c:3041
char * NameListToString(List *names)
Definition: namespace.c:3148
#define IsA(nodeptr, _type_)
Definition: nodes.h:624
@ CMD_UTILITY
Definition: nodes.h:726
#define makeNode(_type_)
Definition: nodes.h:621
#define castNode(_type_, nodeptr)
Definition: nodes.h:642
#define InvokeObjectPostCreateHook(classId, objectId, subId)
Definition: objectaccess.h:171
#define InvokeObjectPostAlterHook(classId, objectId, subId)
Definition: objectaccess.h:195
#define InvokeFunctionExecuteHook(objectId)
Definition: objectaccess.h:211
#define ObjectAddressSet(addr, class_id, object_id)
Definition: objectaddress.h:40
oidvector * buildoidvector(const Oid *oids, int n)
Definition: oid.c:167
Node * coerce_to_specific_type(ParseState *pstate, Node *node, Oid targetTypeId, const char *constructName)
bool IsBinaryCoercible(Oid srctype, Oid targettype)
void assign_expr_collations(ParseState *pstate, Node *expr)
Node * transformExpr(ParseState *pstate, Node *expr, ParseExprKind exprKind)
Definition: parse_expr.c:112
const char * func_signature_string(List *funcname, int nargs, List *argnames, const Oid *argtypes)
Definition: parse_func.c:2031
Oid LookupFuncWithArgs(ObjectType objtype, ObjectWithArgs *func, bool missing_ok)
Definition: parse_func.c:2207
const char * funcname_signature_string(const char *funcname, int nargs, List *argnames, const Oid *argtypes)
Definition: parse_func.c:1994
Oid LookupFuncName(List *funcname, int nargs, const Oid *argtypes, bool missing_ok)
Definition: parse_func.c:2145
void free_parsestate(ParseState *pstate)
Definition: parse_node.c:76
int parser_errposition(ParseState *pstate, int location)
Definition: parse_node.c:110
ParseState * make_parsestate(ParseState *parentParseState)
Definition: parse_node.c:43
@ EXPR_KIND_FUNCTION_DEFAULT
Definition: parse_node.h:70
Type LookupTypeName(ParseState *pstate, const TypeName *typeName, int32 *typmod_p, bool missing_ok)
Definition: parse_type.c:38
char * TypeNameToString(const TypeName *typeName)
Definition: parse_type.c:480
Oid typeTypeId(Type tp)
Definition: parse_type.c:592
Oid typenameTypeId(ParseState *pstate, const TypeName *typeName)
Definition: parse_type.c:291
#define ACL_USAGE
Definition: parsenodes.h:90
FunctionParameterMode
Definition: parsenodes.h:3326
@ FUNC_PARAM_IN
Definition: parsenodes.h:3328
@ FUNC_PARAM_DEFAULT
Definition: parsenodes.h:3334
@ FUNC_PARAM_OUT
Definition: parsenodes.h:3329
@ FUNC_PARAM_TABLE
Definition: parsenodes.h:3332
@ FUNC_PARAM_VARIADIC
Definition: parsenodes.h:3331
@ VAR_RESET_ALL
Definition: parsenodes.h:2494
ObjectType
Definition: parsenodes.h:2133
@ OBJECT_AGGREGATE
Definition: parsenodes.h:2135
@ OBJECT_SCHEMA
Definition: parsenodes.h:2170
@ OBJECT_PROCEDURE
Definition: parsenodes.h:2163
@ OBJECT_LANGUAGE
Definition: parsenodes.h:2155
@ OBJECT_FUNCTION
Definition: parsenodes.h:2153
#define ACL_EXECUTE
Definition: parsenodes.h:89
#define ACL_CREATE
Definition: parsenodes.h:91
Query * transformStmt(ParseState *pstate, Node *parseTree)
Definition: analyze.c:313
void * arg
ObjectAddress CastCreate(Oid sourcetypeid, Oid targettypeid, Oid funcid, char castcontext, char castmethod, DependencyType behavior)
Definition: pg_cast.c:43
#define FUNC_MAX_ARGS
void recordDependencyOn(const ObjectAddress *depender, const ObjectAddress *referenced, DependencyType behavior)
Definition: pg_depend.c:44
long changeDependencyFor(Oid classId, Oid objectId, Oid refClassId, Oid oldRefObjectId, Oid newRefObjectId)
Definition: pg_depend.c:399
long deleteDependencyRecordsFor(Oid classId, Oid objectId, bool skipExtensionDeps)
Definition: pg_depend.c:243
void recordDependencyOnCurrentExtension(const ObjectAddress *object, bool isReplace)
Definition: pg_depend.c:191
FormData_pg_language * Form_pg_language
Definition: pg_language.h:65
#define lfirst(lc)
Definition: pg_list.h:169
#define lfirst_node(type, lc)
Definition: pg_list.h:172
static int list_length(const List *l)
Definition: pg_list.h:149
#define linitial_node(type, l)
Definition: pg_list.h:177
#define NIL
Definition: pg_list.h:65
static Oid list_nth_oid(const List *list, int n)
Definition: pg_list.h:300
#define list_make1(x1)
Definition: pg_list.h:206
#define linitial(l)
Definition: pg_list.h:174
#define lsecond(l)
Definition: pg_list.h:179
static void * list_nth(const List *list, int n)
Definition: pg_list.h:278
#define lfirst_oid(lc)
Definition: pg_list.h:171
ObjectAddress ProcedureCreate(const char *procedureName, Oid procNamespace, bool replace, bool returnsSet, Oid returnType, Oid proowner, Oid languageObjectId, Oid languageValidator, const char *prosrc, const char *probin, Node *prosqlbody, char prokind, bool security_definer, bool isLeakProof, bool isStrict, char volatility, char parallel, oidvector *parameterTypes, Datum allParameterTypes, Datum parameterModes, Datum parameterNames, List *parameterDefaults, Datum trftypes, Datum proconfig, Oid prosupport, float4 procost, float4 prorows)
Definition: pg_proc.c:72
FormData_pg_proc * Form_pg_proc
Definition: pg_proc.h:136
int16 pronargs
Definition: pg_proc.h:81
NameData proname
Definition: pg_proc.h:35
FormData_pg_transform * Form_pg_transform
Definition: pg_transform.h:43
ObjectAddress TypeShellMake(const char *typeName, Oid typeNamespace, Oid ownerId)
Definition: pg_type.c:60
FormData_pg_type * Form_pg_type
Definition: pg_type.h:261
NameData typname
Definition: pg_type.h:41
void pgstat_drop_function(Oid proid)
void pgstat_init_function_usage(FunctionCallInfo fcinfo, PgStat_FunctionCallUsage *fcu)
void pgstat_end_function_usage(PgStat_FunctionCallUsage *fcu, bool finalize)
#define CStringGetDatum(X)
Definition: postgres.h:622
uintptr_t Datum
Definition: postgres.h:411
#define ObjectIdGetDatum(X)
Definition: postgres.h:551
#define CharGetDatum(X)
Definition: postgres.h:460
#define PointerGetDatum(X)
Definition: postgres.h:600
#define InvalidOid
Definition: postgres_ext.h:36
unsigned int Oid
Definition: postgres_ext.h:31
void EnsurePortalSnapshotExists(void)
Definition: pquery.c:1780
@ COERCION_ASSIGNMENT
Definition: primnodes.h:473
@ COERCION_EXPLICIT
Definition: primnodes.h:475
@ COERCION_IMPLICIT
Definition: primnodes.h:472
Oid get_language_oid(const char *langname, bool missing_ok)
Definition: proclang.c:228
#define RelationGetDescr(relation)
Definition: rel.h:515
Snapshot GetTransactionSnapshot(void)
Definition: snapmgr.c:250
void PopActiveSnapshot(void)
Definition: snapmgr.c:776
void PushActiveSnapshot(Snapshot snap)
Definition: snapmgr.c:682
#define ERRCODE_DUPLICATE_OBJECT
Definition: streamutil.c:32
ObjectWithArgs * func
Definition: parsenodes.h:3350
ObjectType objtype
Definition: parsenodes.h:3349
FuncExpr * funcexpr
Definition: parsenodes.h:3388
TypeName * sourcetype
Definition: parsenodes.h:3878
TypeName * targettype
Definition: parsenodes.h:3879
CoercionContext context
Definition: parsenodes.h:3881
ObjectWithArgs * func
Definition: parsenodes.h:3880
TypeName * returnType
Definition: parsenodes.h:3320
ObjectWithArgs * tosql
Definition: parsenodes.h:3896
TypeName * type_name
Definition: parsenodes.h:3893
ObjectWithArgs * fromsql
Definition: parsenodes.h:3895
char * defname
Definition: parsenodes.h:765
int location
Definition: parsenodes.h:769
Node * arg
Definition: parsenodes.h:766
List * args
Definition: parsenodes.h:3363
ParamListInfo es_param_list_info
Definition: execnodes.h:626
Definition: fmgr.h:57
Oid funcid
Definition: primnodes.h:504
List * args
Definition: primnodes.h:512
Oid inputcollid
Definition: primnodes.h:511
Oid funcresulttype
Definition: primnodes.h:505
TypeName * argType
Definition: parsenodes.h:3341
FunctionParameterMode mode
Definition: parsenodes.h:3342
ItemPointerData t_self
Definition: htup.h:65
uint32 t_len
Definition: htup.h:64
HeapTupleHeader t_data
Definition: htup.h:68
Oid t_tableOid
Definition: htup.h:66
char * source_text
Definition: parsenodes.h:3369
Definition: pg_list.h:51
Definition: nodes.h:574
const char * p_sourcetext
Definition: parse_node.h:182
List * p_rtable
Definition: parse_node.h:183
CmdType commandType
Definition: parsenodes.h:121
Node * utilityStmt
Definition: parsenodes.h:129
TupleTableSlot * slot
Definition: executor.h:493
DestReceiver * dest
Definition: executor.h:494
bool setof
Definition: parsenodes.h:228
List * names
Definition: parsenodes.h:226
List * typmods
Definition: parsenodes.h:230
VariableSetKind kind
Definition: parsenodes.h:2500
bool(* receiveSlot)(TupleTableSlot *slot, DestReceiver *self)
Definition: dest.h:119
Definition: c.h:661
Oid values[FLEXIBLE_ARRAY_MEMBER]
Definition: c.h:668
bool superuser(void)
Definition: superuser.c:46
void ReleaseSysCache(HeapTuple tuple)
Definition: syscache.c:1221
HeapTuple SearchSysCache1(int cacheId, Datum key1)
Definition: syscache.c:1173
Datum SysCacheGetAttr(int cacheId, HeapTuple tup, AttrNumber attributeNumber, bool *isNull)
Definition: syscache.c:1434
HeapTuple SearchSysCache2(int cacheId, Datum key1, Datum key2)
Definition: syscache.c:1184
#define SearchSysCacheCopy1(cacheId, key1)
Definition: syscache.h:179
@ TRFTYPELANG
Definition: syscache.h:103
@ AGGFNOID
Definition: syscache.h:34
@ PROCOID
Definition: syscache.h:79
@ LANGNAME
Definition: syscache.h:67
@ PROCNAMEARGSNSP
Definition: syscache.h:78
#define SearchSysCacheExists3(cacheId, key1, key2, key3)
Definition: syscache.h:192
#define GetSysCacheOid2(cacheId, oidcol, key1, key2)
Definition: syscache.h:199
void table_close(Relation relation, LOCKMODE lockmode)
Definition: table.c:167
Relation table_open(Oid relationId, LOCKMODE lockmode)
Definition: table.c:39
#define ReleaseTupleDesc(tupdesc)
Definition: tupdesc.h:122
TupleDesc lookup_rowtype_tupdesc(Oid type_id, int32 typmod)
Definition: typcache.c:1830
CommandTag CreateCommandTag(Node *parsetree)
Definition: utility.c:2353
String * makeString(char *str)
Definition: value.c:63
#define boolVal(v)
Definition: value.h:71
#define strVal(v)
Definition: value.h:72
bool contain_var_clause(Node *node)
Definition: var.c:400