Line data Source code
1 : /*-------------------------------------------------------------------------
2 : *
3 : * pg_proc.c
4 : * routines to support manipulation of the pg_proc relation
5 : *
6 : * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
7 : * Portions Copyright (c) 1994, Regents of the University of California
8 : *
9 : *
10 : * IDENTIFICATION
11 : * src/backend/catalog/pg_proc.c
12 : *
13 : *-------------------------------------------------------------------------
14 : */
15 : #include "postgres.h"
16 :
17 : #include "access/htup_details.h"
18 : #include "access/table.h"
19 : #include "access/xact.h"
20 : #include "catalog/catalog.h"
21 : #include "catalog/dependency.h"
22 : #include "catalog/indexing.h"
23 : #include "catalog/objectaccess.h"
24 : #include "catalog/pg_language.h"
25 : #include "catalog/pg_namespace.h"
26 : #include "catalog/pg_proc.h"
27 : #include "catalog/pg_transform.h"
28 : #include "catalog/pg_type.h"
29 : #include "executor/functions.h"
30 : #include "funcapi.h"
31 : #include "mb/pg_wchar.h"
32 : #include "miscadmin.h"
33 : #include "nodes/nodeFuncs.h"
34 : #include "parser/parse_coerce.h"
35 : #include "pgstat.h"
36 : #include "rewrite/rewriteHandler.h"
37 : #include "tcop/pquery.h"
38 : #include "tcop/tcopprot.h"
39 : #include "utils/acl.h"
40 : #include "utils/builtins.h"
41 : #include "utils/lsyscache.h"
42 : #include "utils/regproc.h"
43 : #include "utils/rel.h"
44 : #include "utils/syscache.h"
45 :
46 :
47 : typedef struct
48 : {
49 : char *proname;
50 : char *prosrc;
51 : } parse_error_callback_arg;
52 :
53 : static void sql_function_parse_error_callback(void *arg);
54 : static int match_prosrc_to_query(const char *prosrc, const char *queryText,
55 : int cursorpos);
56 : static bool match_prosrc_to_literal(const char *prosrc, const char *literal,
57 : int cursorpos, int *newcursorpos);
58 :
59 :
60 : /* ----------------------------------------------------------------
61 : * ProcedureCreate
62 : *
63 : * procedureName: string name of routine (proname)
64 : * procNamespace: OID of namespace (pronamespace)
65 : * replace: true to allow replacement of an existing pg_proc entry
66 : * returnsSet: returns set? (proretset)
67 : * returnType: OID of result type (prorettype)
68 : * proowner: OID of owner role (proowner)
69 : * languageObjectId: OID of function language (prolang)
70 : * languageValidator: OID of validator function to apply, if any
71 : * prosrc: string form of function definition (prosrc)
72 : * probin: string form of binary reference, or NULL (probin)
73 : * prosqlbody: Node tree of pre-parsed SQL body, or NULL (prosqlbody)
74 : * prokind: function/aggregate/procedure/etc code (prokind)
75 : * security_definer: security definer? (prosecdef)
76 : * isLeakProof: leak proof? (proleakproof)
77 : * isStrict: strict? (proisstrict)
78 : * volatility: volatility code (provolatile)
79 : * parallel: parallel safety code (proparallel)
80 : * parameterTypes: input parameter types, as an oidvector (proargtypes)
81 : * allParameterTypes: all parameter types, as an OID array (proallargtypes)
82 : * parameterModes: parameter modes, as a "char" array (proargmodes)
83 : * parameterNames: parameter names, as a text array (proargnames)
84 : * parameterDefaults: defaults, as a List of Node trees (proargdefaults)
85 : * trftypes: transformable type OIDs, as an OID array (protrftypes)
86 : * trfoids: List of transform OIDs that routine should depend on
87 : * proconfig: GUC set clauses, as a text array (proconfig)
88 : * prosupport: OID of support function, if any (prosupport)
89 : * procost: cost factor (procost)
90 : * prorows: estimated output rows for a SRF (prorows)
91 : *
92 : * Note: allParameterTypes, parameterModes, parameterNames, trftypes, and proconfig
93 : * are either arrays of the proper types or NULL. We declare them Datum,
94 : * not "ArrayType *", to avoid importing array.h into pg_proc.h.
95 : * ----------------------------------------------------------------
96 : */
97 : ObjectAddress
98 25916 : ProcedureCreate(const char *procedureName,
99 : Oid procNamespace,
100 : bool replace,
101 : bool returnsSet,
102 : Oid returnType,
103 : Oid proowner,
104 : Oid languageObjectId,
105 : Oid languageValidator,
106 : const char *prosrc,
107 : const char *probin,
108 : Node *prosqlbody,
109 : char prokind,
110 : bool security_definer,
111 : bool isLeakProof,
112 : bool isStrict,
113 : char volatility,
114 : char parallel,
115 : oidvector *parameterTypes,
116 : Datum allParameterTypes,
117 : Datum parameterModes,
118 : Datum parameterNames,
119 : List *parameterDefaults,
120 : Datum trftypes,
121 : List *trfoids,
122 : Datum proconfig,
123 : Oid prosupport,
124 : float4 procost,
125 : float4 prorows)
126 : {
127 : Oid retval;
128 : int parameterCount;
129 : int allParamCount;
130 : Oid *allParams;
131 25916 : char *paramModes = NULL;
132 25916 : Oid variadicType = InvalidOid;
133 25916 : Acl *proacl = NULL;
134 : Relation rel;
135 : HeapTuple tup;
136 : HeapTuple oldtup;
137 : bool nulls[Natts_pg_proc];
138 : Datum values[Natts_pg_proc];
139 : bool replaces[Natts_pg_proc];
140 : NameData procname;
141 : TupleDesc tupDesc;
142 : bool is_update;
143 : ObjectAddress myself,
144 : referenced;
145 : char *detailmsg;
146 : int i;
147 : ObjectAddresses *addrs;
148 :
149 : /*
150 : * sanity checks
151 : */
152 : Assert(PointerIsValid(prosrc));
153 :
154 25916 : parameterCount = parameterTypes->dim1;
155 25916 : if (parameterCount < 0 || parameterCount > FUNC_MAX_ARGS)
156 0 : ereport(ERROR,
157 : (errcode(ERRCODE_TOO_MANY_ARGUMENTS),
158 : errmsg_plural("functions cannot have more than %d argument",
159 : "functions cannot have more than %d arguments",
160 : FUNC_MAX_ARGS,
161 : FUNC_MAX_ARGS)));
162 : /* note: the above is correct, we do NOT count output arguments */
163 :
164 : /* Deconstruct array inputs */
165 25916 : if (allParameterTypes != PointerGetDatum(NULL))
166 : {
167 : /*
168 : * We expect the array to be a 1-D OID array; verify that. We don't
169 : * need to use deconstruct_array() since the array data is just going
170 : * to look like a C array of OID values.
171 : */
172 2790 : ArrayType *allParamArray = (ArrayType *) DatumGetPointer(allParameterTypes);
173 :
174 2790 : allParamCount = ARR_DIMS(allParamArray)[0];
175 2790 : if (ARR_NDIM(allParamArray) != 1 ||
176 2790 : allParamCount <= 0 ||
177 2790 : ARR_HASNULL(allParamArray) ||
178 2790 : ARR_ELEMTYPE(allParamArray) != OIDOID)
179 0 : elog(ERROR, "allParameterTypes is not a 1-D Oid array");
180 2790 : allParams = (Oid *) ARR_DATA_PTR(allParamArray);
181 : Assert(allParamCount >= parameterCount);
182 : /* we assume caller got the contents right */
183 : }
184 : else
185 : {
186 23126 : allParamCount = parameterCount;
187 23126 : allParams = parameterTypes->values;
188 : }
189 :
190 25916 : if (parameterModes != PointerGetDatum(NULL))
191 : {
192 : /*
193 : * We expect the array to be a 1-D CHAR array; verify that. We don't
194 : * need to use deconstruct_array() since the array data is just going
195 : * to look like a C array of char values.
196 : */
197 2790 : ArrayType *modesArray = (ArrayType *) DatumGetPointer(parameterModes);
198 :
199 2790 : if (ARR_NDIM(modesArray) != 1 ||
200 2790 : ARR_DIMS(modesArray)[0] != allParamCount ||
201 2790 : ARR_HASNULL(modesArray) ||
202 2790 : ARR_ELEMTYPE(modesArray) != CHAROID)
203 0 : elog(ERROR, "parameterModes is not a 1-D char array");
204 2790 : paramModes = (char *) ARR_DATA_PTR(modesArray);
205 : }
206 :
207 : /*
208 : * Do not allow polymorphic return type unless there is a polymorphic
209 : * input argument that we can use to deduce the actual return type.
210 : */
211 25916 : detailmsg = check_valid_polymorphic_signature(returnType,
212 25916 : parameterTypes->values,
213 : parameterCount);
214 25916 : if (detailmsg)
215 78 : ereport(ERROR,
216 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
217 : errmsg("cannot determine result data type"),
218 : errdetail_internal("%s", detailmsg)));
219 :
220 : /*
221 : * Also, do not allow return type INTERNAL unless at least one input
222 : * argument is INTERNAL.
223 : */
224 25838 : detailmsg = check_valid_internal_signature(returnType,
225 25838 : parameterTypes->values,
226 : parameterCount);
227 25838 : if (detailmsg)
228 0 : ereport(ERROR,
229 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
230 : errmsg("unsafe use of pseudo-type \"internal\""),
231 : errdetail_internal("%s", detailmsg)));
232 :
233 : /*
234 : * Apply the same tests to any OUT arguments.
235 : */
236 25838 : if (allParameterTypes != PointerGetDatum(NULL))
237 : {
238 20150 : for (i = 0; i < allParamCount; i++)
239 : {
240 17408 : if (paramModes == NULL ||
241 17408 : paramModes[i] == PROARGMODE_IN ||
242 13104 : paramModes[i] == PROARGMODE_VARIADIC)
243 4976 : continue; /* ignore input-only params */
244 :
245 12432 : detailmsg = check_valid_polymorphic_signature(allParams[i],
246 12432 : parameterTypes->values,
247 : parameterCount);
248 12432 : if (detailmsg)
249 48 : ereport(ERROR,
250 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
251 : errmsg("cannot determine result data type"),
252 : errdetail_internal("%s", detailmsg)));
253 12384 : detailmsg = check_valid_internal_signature(allParams[i],
254 12384 : parameterTypes->values,
255 : parameterCount);
256 12384 : if (detailmsg)
257 0 : ereport(ERROR,
258 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
259 : errmsg("unsafe use of pseudo-type \"internal\""),
260 : errdetail_internal("%s", detailmsg)));
261 : }
262 : }
263 :
264 : /* Identify variadic argument type, if any */
265 25790 : if (paramModes != NULL)
266 : {
267 : /*
268 : * Only the last input parameter can be variadic; if it is, save its
269 : * element type. Errors here are just elog since caller should have
270 : * checked this already.
271 : */
272 20042 : for (i = 0; i < allParamCount; i++)
273 : {
274 17300 : switch (paramModes[i])
275 : {
276 4436 : case PROARGMODE_IN:
277 : case PROARGMODE_INOUT:
278 4436 : if (OidIsValid(variadicType))
279 0 : elog(ERROR, "variadic parameter must be last");
280 4436 : break;
281 11754 : case PROARGMODE_OUT:
282 11754 : if (OidIsValid(variadicType) && prokind == PROKIND_PROCEDURE)
283 0 : elog(ERROR, "variadic parameter must be last");
284 11754 : break;
285 438 : case PROARGMODE_TABLE:
286 : /* okay */
287 438 : break;
288 672 : case PROARGMODE_VARIADIC:
289 672 : if (OidIsValid(variadicType))
290 0 : elog(ERROR, "variadic parameter must be last");
291 672 : switch (allParams[i])
292 : {
293 10 : case ANYOID:
294 10 : variadicType = ANYOID;
295 10 : break;
296 46 : case ANYARRAYOID:
297 46 : variadicType = ANYELEMENTOID;
298 46 : break;
299 26 : case ANYCOMPATIBLEARRAYOID:
300 26 : variadicType = ANYCOMPATIBLEOID;
301 26 : break;
302 590 : default:
303 590 : variadicType = get_element_type(allParams[i]);
304 590 : if (!OidIsValid(variadicType))
305 0 : elog(ERROR, "variadic parameter is not an array");
306 590 : break;
307 : }
308 672 : break;
309 0 : default:
310 0 : elog(ERROR, "invalid parameter mode '%c'", paramModes[i]);
311 : break;
312 : }
313 : }
314 : }
315 :
316 : /*
317 : * All seems OK; prepare the data to be inserted into pg_proc.
318 : */
319 :
320 799490 : for (i = 0; i < Natts_pg_proc; ++i)
321 : {
322 773700 : nulls[i] = false;
323 773700 : values[i] = (Datum) 0;
324 773700 : replaces[i] = true;
325 : }
326 :
327 25790 : namestrcpy(&procname, procedureName);
328 25790 : values[Anum_pg_proc_proname - 1] = NameGetDatum(&procname);
329 25790 : values[Anum_pg_proc_pronamespace - 1] = ObjectIdGetDatum(procNamespace);
330 25790 : values[Anum_pg_proc_proowner - 1] = ObjectIdGetDatum(proowner);
331 25790 : values[Anum_pg_proc_prolang - 1] = ObjectIdGetDatum(languageObjectId);
332 25790 : values[Anum_pg_proc_procost - 1] = Float4GetDatum(procost);
333 25790 : values[Anum_pg_proc_prorows - 1] = Float4GetDatum(prorows);
334 25790 : values[Anum_pg_proc_provariadic - 1] = ObjectIdGetDatum(variadicType);
335 25790 : values[Anum_pg_proc_prosupport - 1] = ObjectIdGetDatum(prosupport);
336 25790 : values[Anum_pg_proc_prokind - 1] = CharGetDatum(prokind);
337 25790 : values[Anum_pg_proc_prosecdef - 1] = BoolGetDatum(security_definer);
338 25790 : values[Anum_pg_proc_proleakproof - 1] = BoolGetDatum(isLeakProof);
339 25790 : values[Anum_pg_proc_proisstrict - 1] = BoolGetDatum(isStrict);
340 25790 : values[Anum_pg_proc_proretset - 1] = BoolGetDatum(returnsSet);
341 25790 : values[Anum_pg_proc_provolatile - 1] = CharGetDatum(volatility);
342 25790 : values[Anum_pg_proc_proparallel - 1] = CharGetDatum(parallel);
343 25790 : values[Anum_pg_proc_pronargs - 1] = UInt16GetDatum(parameterCount);
344 25790 : values[Anum_pg_proc_pronargdefaults - 1] = UInt16GetDatum(list_length(parameterDefaults));
345 25790 : values[Anum_pg_proc_prorettype - 1] = ObjectIdGetDatum(returnType);
346 25790 : values[Anum_pg_proc_proargtypes - 1] = PointerGetDatum(parameterTypes);
347 25790 : if (allParameterTypes != PointerGetDatum(NULL))
348 2742 : values[Anum_pg_proc_proallargtypes - 1] = allParameterTypes;
349 : else
350 23048 : nulls[Anum_pg_proc_proallargtypes - 1] = true;
351 25790 : if (parameterModes != PointerGetDatum(NULL))
352 2742 : values[Anum_pg_proc_proargmodes - 1] = parameterModes;
353 : else
354 23048 : nulls[Anum_pg_proc_proargmodes - 1] = true;
355 25790 : if (parameterNames != PointerGetDatum(NULL))
356 8288 : values[Anum_pg_proc_proargnames - 1] = parameterNames;
357 : else
358 17502 : nulls[Anum_pg_proc_proargnames - 1] = true;
359 25790 : if (parameterDefaults != NIL)
360 3698 : values[Anum_pg_proc_proargdefaults - 1] = CStringGetTextDatum(nodeToString(parameterDefaults));
361 : else
362 22092 : nulls[Anum_pg_proc_proargdefaults - 1] = true;
363 25790 : if (trftypes != PointerGetDatum(NULL))
364 118 : values[Anum_pg_proc_protrftypes - 1] = trftypes;
365 : else
366 25672 : nulls[Anum_pg_proc_protrftypes - 1] = true;
367 25790 : values[Anum_pg_proc_prosrc - 1] = CStringGetTextDatum(prosrc);
368 25790 : if (probin)
369 5706 : values[Anum_pg_proc_probin - 1] = CStringGetTextDatum(probin);
370 : else
371 20084 : nulls[Anum_pg_proc_probin - 1] = true;
372 25790 : if (prosqlbody)
373 5546 : values[Anum_pg_proc_prosqlbody - 1] = CStringGetTextDatum(nodeToString(prosqlbody));
374 : else
375 20244 : nulls[Anum_pg_proc_prosqlbody - 1] = true;
376 25790 : if (proconfig != PointerGetDatum(NULL))
377 102 : values[Anum_pg_proc_proconfig - 1] = proconfig;
378 : else
379 25688 : nulls[Anum_pg_proc_proconfig - 1] = true;
380 : /* proacl will be determined later */
381 :
382 25790 : rel = table_open(ProcedureRelationId, RowExclusiveLock);
383 25790 : tupDesc = RelationGetDescr(rel);
384 :
385 : /* Check for pre-existing definition */
386 25790 : oldtup = SearchSysCache3(PROCNAMEARGSNSP,
387 : PointerGetDatum(procedureName),
388 : PointerGetDatum(parameterTypes),
389 : ObjectIdGetDatum(procNamespace));
390 :
391 25790 : if (HeapTupleIsValid(oldtup))
392 : {
393 : /* There is one; okay to replace it? */
394 8734 : Form_pg_proc oldproc = (Form_pg_proc) GETSTRUCT(oldtup);
395 : Datum proargnames;
396 : bool isnull;
397 : const char *dropcmd;
398 :
399 8734 : if (!replace)
400 0 : ereport(ERROR,
401 : (errcode(ERRCODE_DUPLICATE_FUNCTION),
402 : errmsg("function \"%s\" already exists with same argument types",
403 : procedureName)));
404 8734 : if (!object_ownercheck(ProcedureRelationId, oldproc->oid, proowner))
405 0 : aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_FUNCTION,
406 : procedureName);
407 :
408 : /* Not okay to change routine kind */
409 8734 : if (oldproc->prokind != prokind)
410 18 : ereport(ERROR,
411 : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
412 : errmsg("cannot change routine kind"),
413 : (oldproc->prokind == PROKIND_AGGREGATE ?
414 : errdetail("\"%s\" is an aggregate function.", procedureName) :
415 : oldproc->prokind == PROKIND_FUNCTION ?
416 : errdetail("\"%s\" is a function.", procedureName) :
417 : oldproc->prokind == PROKIND_PROCEDURE ?
418 : errdetail("\"%s\" is a procedure.", procedureName) :
419 : oldproc->prokind == PROKIND_WINDOW ?
420 : errdetail("\"%s\" is a window function.", procedureName) :
421 : 0)));
422 :
423 8716 : dropcmd = (prokind == PROKIND_PROCEDURE ? "DROP PROCEDURE" :
424 : prokind == PROKIND_AGGREGATE ? "DROP AGGREGATE" :
425 : "DROP FUNCTION");
426 :
427 : /*
428 : * Not okay to change the return type of the existing proc, since
429 : * existing rules, views, etc may depend on the return type.
430 : *
431 : * In case of a procedure, a changing return type means that whether
432 : * the procedure has output parameters was changed. Since there is no
433 : * user visible return type, we produce a more specific error message.
434 : */
435 8716 : if (returnType != oldproc->prorettype ||
436 8704 : returnsSet != oldproc->proretset)
437 12 : ereport(ERROR,
438 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
439 : prokind == PROKIND_PROCEDURE
440 : ? errmsg("cannot change whether a procedure has output parameters")
441 : : errmsg("cannot change return type of existing function"),
442 :
443 : /*
444 : * translator: first %s is DROP FUNCTION, DROP PROCEDURE, or DROP
445 : * AGGREGATE
446 : */
447 : errhint("Use %s %s first.",
448 : dropcmd,
449 : format_procedure(oldproc->oid))));
450 :
451 : /*
452 : * If it returns RECORD, check for possible change of record type
453 : * implied by OUT parameters
454 : */
455 8704 : if (returnType == RECORDOID)
456 : {
457 : TupleDesc olddesc;
458 : TupleDesc newdesc;
459 :
460 940 : olddesc = build_function_result_tupdesc_t(oldtup);
461 940 : newdesc = build_function_result_tupdesc_d(prokind,
462 : allParameterTypes,
463 : parameterModes,
464 : parameterNames);
465 940 : if (olddesc == NULL && newdesc == NULL)
466 : /* ok, both are runtime-defined RECORDs */ ;
467 916 : else if (olddesc == NULL || newdesc == NULL ||
468 916 : !equalRowTypes(olddesc, newdesc))
469 0 : ereport(ERROR,
470 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
471 : errmsg("cannot change return type of existing function"),
472 : errdetail("Row type defined by OUT parameters is different."),
473 : /* translator: first %s is DROP FUNCTION or DROP PROCEDURE */
474 : errhint("Use %s %s first.",
475 : dropcmd,
476 : format_procedure(oldproc->oid))));
477 : }
478 :
479 : /*
480 : * If there were any named input parameters, check to make sure the
481 : * names have not been changed, as this could break existing calls. We
482 : * allow adding names to formerly unnamed parameters, though.
483 : */
484 8704 : proargnames = SysCacheGetAttr(PROCNAMEARGSNSP, oldtup,
485 : Anum_pg_proc_proargnames,
486 : &isnull);
487 8704 : if (!isnull)
488 : {
489 : Datum proargmodes;
490 : char **old_arg_names;
491 : char **new_arg_names;
492 : int n_old_arg_names;
493 : int n_new_arg_names;
494 : int j;
495 :
496 1474 : proargmodes = SysCacheGetAttr(PROCNAMEARGSNSP, oldtup,
497 : Anum_pg_proc_proargmodes,
498 : &isnull);
499 1474 : if (isnull)
500 540 : proargmodes = PointerGetDatum(NULL); /* just to be sure */
501 :
502 1474 : n_old_arg_names = get_func_input_arg_names(proargnames,
503 : proargmodes,
504 : &old_arg_names);
505 1474 : n_new_arg_names = get_func_input_arg_names(parameterNames,
506 : parameterModes,
507 : &new_arg_names);
508 5678 : for (j = 0; j < n_old_arg_names; j++)
509 : {
510 4222 : if (old_arg_names[j] == NULL)
511 6 : continue;
512 4216 : if (j >= n_new_arg_names || new_arg_names[j] == NULL ||
513 4210 : strcmp(old_arg_names[j], new_arg_names[j]) != 0)
514 18 : ereport(ERROR,
515 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
516 : errmsg("cannot change name of input parameter \"%s\"",
517 : old_arg_names[j]),
518 : /* translator: first %s is DROP FUNCTION or DROP PROCEDURE */
519 : errhint("Use %s %s first.",
520 : dropcmd,
521 : format_procedure(oldproc->oid))));
522 : }
523 : }
524 :
525 : /*
526 : * If there are existing defaults, check compatibility: redefinition
527 : * must not remove any defaults nor change their types. (Removing a
528 : * default might cause a function to fail to satisfy an existing call.
529 : * Changing type would only be possible if the associated parameter is
530 : * polymorphic, and in such cases a change of default type might alter
531 : * the resolved output type of existing calls.)
532 : */
533 8686 : if (oldproc->pronargdefaults != 0)
534 : {
535 : Datum proargdefaults;
536 : List *oldDefaults;
537 : ListCell *oldlc;
538 : ListCell *newlc;
539 :
540 6 : if (list_length(parameterDefaults) < oldproc->pronargdefaults)
541 6 : ereport(ERROR,
542 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
543 : errmsg("cannot remove parameter defaults from existing function"),
544 : /* translator: first %s is DROP FUNCTION or DROP PROCEDURE */
545 : errhint("Use %s %s first.",
546 : dropcmd,
547 : format_procedure(oldproc->oid))));
548 :
549 0 : proargdefaults = SysCacheGetAttrNotNull(PROCNAMEARGSNSP, oldtup,
550 : Anum_pg_proc_proargdefaults);
551 0 : oldDefaults = castNode(List, stringToNode(TextDatumGetCString(proargdefaults)));
552 : Assert(list_length(oldDefaults) == oldproc->pronargdefaults);
553 :
554 : /* new list can have more defaults than old, advance over 'em */
555 0 : newlc = list_nth_cell(parameterDefaults,
556 0 : list_length(parameterDefaults) -
557 0 : oldproc->pronargdefaults);
558 :
559 0 : foreach(oldlc, oldDefaults)
560 : {
561 0 : Node *oldDef = (Node *) lfirst(oldlc);
562 0 : Node *newDef = (Node *) lfirst(newlc);
563 :
564 0 : if (exprType(oldDef) != exprType(newDef))
565 0 : ereport(ERROR,
566 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
567 : errmsg("cannot change data type of existing parameter default value"),
568 : /* translator: first %s is DROP FUNCTION or DROP PROCEDURE */
569 : errhint("Use %s %s first.",
570 : dropcmd,
571 : format_procedure(oldproc->oid))));
572 0 : newlc = lnext(parameterDefaults, newlc);
573 : }
574 : }
575 :
576 : /*
577 : * Do not change existing oid, ownership or permissions, either. Note
578 : * dependency-update code below has to agree with this decision.
579 : */
580 8680 : replaces[Anum_pg_proc_oid - 1] = false;
581 8680 : replaces[Anum_pg_proc_proowner - 1] = false;
582 8680 : replaces[Anum_pg_proc_proacl - 1] = false;
583 :
584 : /* Okay, do it... */
585 8680 : tup = heap_modify_tuple(oldtup, tupDesc, values, nulls, replaces);
586 8680 : CatalogTupleUpdate(rel, &tup->t_self, tup);
587 :
588 8680 : ReleaseSysCache(oldtup);
589 8680 : is_update = true;
590 : }
591 : else
592 : {
593 : /* Creating a new procedure */
594 : Oid newOid;
595 :
596 : /* First, get default permissions and set up proacl */
597 17056 : proacl = get_user_default_acl(OBJECT_FUNCTION, proowner,
598 : procNamespace);
599 17056 : if (proacl != NULL)
600 18 : values[Anum_pg_proc_proacl - 1] = PointerGetDatum(proacl);
601 : else
602 17038 : nulls[Anum_pg_proc_proacl - 1] = true;
603 :
604 17056 : newOid = GetNewOidWithIndex(rel, ProcedureOidIndexId,
605 : Anum_pg_proc_oid);
606 17056 : values[Anum_pg_proc_oid - 1] = ObjectIdGetDatum(newOid);
607 17056 : tup = heap_form_tuple(tupDesc, values, nulls);
608 17056 : CatalogTupleInsert(rel, tup);
609 17056 : is_update = false;
610 : }
611 :
612 :
613 25736 : retval = ((Form_pg_proc) GETSTRUCT(tup))->oid;
614 :
615 : /*
616 : * Create dependencies for the new function. If we are updating an
617 : * existing function, first delete any existing pg_depend entries.
618 : * (However, since we are not changing ownership or permissions, the
619 : * shared dependencies do *not* need to change, and we leave them alone.)
620 : */
621 25736 : if (is_update)
622 8680 : deleteDependencyRecordsFor(ProcedureRelationId, retval, true);
623 :
624 25736 : addrs = new_object_addresses();
625 :
626 25736 : ObjectAddressSet(myself, ProcedureRelationId, retval);
627 :
628 : /* dependency on namespace */
629 25736 : ObjectAddressSet(referenced, NamespaceRelationId, procNamespace);
630 25736 : add_exact_object_address(&referenced, addrs);
631 :
632 : /* dependency on implementation language */
633 25736 : ObjectAddressSet(referenced, LanguageRelationId, languageObjectId);
634 25736 : add_exact_object_address(&referenced, addrs);
635 :
636 : /* dependency on return type */
637 25736 : ObjectAddressSet(referenced, TypeRelationId, returnType);
638 25736 : add_exact_object_address(&referenced, addrs);
639 :
640 : /* dependency on parameter types */
641 80452 : for (i = 0; i < allParamCount; i++)
642 : {
643 54716 : ObjectAddressSet(referenced, TypeRelationId, allParams[i]);
644 54716 : add_exact_object_address(&referenced, addrs);
645 : }
646 :
647 : /* dependency on transforms, if any */
648 51594 : foreach_oid(transformid, trfoids)
649 : {
650 122 : ObjectAddressSet(referenced, TransformRelationId, transformid);
651 122 : add_exact_object_address(&referenced, addrs);
652 : }
653 :
654 : /* dependency on support function, if any */
655 25736 : if (OidIsValid(prosupport))
656 : {
657 110 : ObjectAddressSet(referenced, ProcedureRelationId, prosupport);
658 110 : add_exact_object_address(&referenced, addrs);
659 : }
660 :
661 25736 : record_object_address_dependencies(&myself, addrs, DEPENDENCY_NORMAL);
662 25736 : free_object_addresses(addrs);
663 :
664 : /* dependency on SQL routine body */
665 25736 : if (languageObjectId == SQLlanguageId && prosqlbody)
666 5546 : recordDependencyOnExpr(&myself, prosqlbody, NIL, DEPENDENCY_NORMAL);
667 :
668 : /* dependency on parameter default expressions */
669 25736 : if (parameterDefaults)
670 3686 : recordDependencyOnExpr(&myself, (Node *) parameterDefaults,
671 : NIL, DEPENDENCY_NORMAL);
672 :
673 : /* dependency on owner */
674 25736 : if (!is_update)
675 17056 : recordDependencyOnOwner(ProcedureRelationId, retval, proowner);
676 :
677 : /* dependency on any roles mentioned in ACL */
678 25736 : if (!is_update)
679 17056 : recordDependencyOnNewAcl(ProcedureRelationId, retval, 0,
680 : proowner, proacl);
681 :
682 : /* dependency on extension */
683 25736 : recordDependencyOnCurrentExtension(&myself, is_update);
684 :
685 25734 : heap_freetuple(tup);
686 :
687 : /* Post creation hook for new function */
688 25734 : InvokeObjectPostCreateHook(ProcedureRelationId, retval, 0);
689 :
690 25734 : table_close(rel, RowExclusiveLock);
691 :
692 : /* Verify function body */
693 25734 : if (OidIsValid(languageValidator))
694 : {
695 24920 : ArrayType *set_items = NULL;
696 24920 : int save_nestlevel = 0;
697 :
698 : /* Advance command counter so new tuple can be seen by validator */
699 24920 : CommandCounterIncrement();
700 :
701 : /*
702 : * Set per-function configuration parameters so that the validation is
703 : * done with the environment the function expects. However, if
704 : * check_function_bodies is off, we don't do this, because that would
705 : * create dump ordering hazards that pg_dump doesn't know how to deal
706 : * with. (For example, a SET clause might refer to a not-yet-created
707 : * text search configuration.) This means that the validator
708 : * shouldn't complain about anything that might depend on a GUC
709 : * parameter when check_function_bodies is off.
710 : */
711 24920 : if (check_function_bodies)
712 : {
713 17598 : set_items = (ArrayType *) DatumGetPointer(proconfig);
714 17598 : if (set_items) /* Need a new GUC nesting level */
715 : {
716 84 : save_nestlevel = NewGUCNestLevel();
717 84 : ProcessGUCArray(set_items,
718 84 : (superuser() ? PGC_SUSET : PGC_USERSET),
719 : PGC_S_SESSION,
720 : GUC_ACTION_SAVE);
721 : }
722 : }
723 :
724 24908 : OidFunctionCall1(languageValidator, ObjectIdGetDatum(retval));
725 :
726 24724 : if (set_items)
727 72 : AtEOXact_GUC(true, save_nestlevel);
728 : }
729 :
730 : /* ensure that stats are dropped if transaction aborts */
731 25538 : if (!is_update)
732 16860 : pgstat_create_function(retval);
733 :
734 25538 : return myself;
735 : }
736 :
737 :
738 :
739 : /*
740 : * Validator for internal functions
741 : *
742 : * Check that the given internal function name (the "prosrc" value) is
743 : * a known builtin function.
744 : */
745 : Datum
746 5058 : fmgr_internal_validator(PG_FUNCTION_ARGS)
747 : {
748 5058 : Oid funcoid = PG_GETARG_OID(0);
749 : HeapTuple tuple;
750 : Datum tmp;
751 : char *prosrc;
752 :
753 5058 : if (!CheckFunctionValidatorAccess(fcinfo->flinfo->fn_oid, funcoid))
754 0 : PG_RETURN_VOID();
755 :
756 : /*
757 : * We do not honor check_function_bodies since it's unlikely the function
758 : * name will be found later if it isn't there now.
759 : */
760 :
761 5058 : tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcoid));
762 5058 : if (!HeapTupleIsValid(tuple))
763 0 : elog(ERROR, "cache lookup failed for function %u", funcoid);
764 :
765 5058 : tmp = SysCacheGetAttrNotNull(PROCOID, tuple, Anum_pg_proc_prosrc);
766 5058 : prosrc = TextDatumGetCString(tmp);
767 :
768 5058 : if (fmgr_internal_function(prosrc) == InvalidOid)
769 6 : ereport(ERROR,
770 : (errcode(ERRCODE_UNDEFINED_FUNCTION),
771 : errmsg("there is no built-in function named \"%s\"",
772 : prosrc)));
773 :
774 5052 : ReleaseSysCache(tuple);
775 :
776 5052 : PG_RETURN_VOID();
777 : }
778 :
779 :
780 :
781 : /*
782 : * Validator for C language functions
783 : *
784 : * Make sure that the library file exists, is loadable, and contains
785 : * the specified link symbol. Also check for a valid function
786 : * information record.
787 : */
788 : Datum
789 5706 : fmgr_c_validator(PG_FUNCTION_ARGS)
790 : {
791 5706 : Oid funcoid = PG_GETARG_OID(0);
792 : void *libraryhandle;
793 : HeapTuple tuple;
794 : Datum tmp;
795 : char *prosrc;
796 : char *probin;
797 :
798 5706 : if (!CheckFunctionValidatorAccess(fcinfo->flinfo->fn_oid, funcoid))
799 0 : PG_RETURN_VOID();
800 :
801 : /*
802 : * It'd be most consistent to skip the check if !check_function_bodies,
803 : * but the purpose of that switch is to be helpful for pg_dump loading,
804 : * and for pg_dump loading it's much better if we *do* check.
805 : */
806 :
807 5706 : tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcoid));
808 5706 : if (!HeapTupleIsValid(tuple))
809 0 : elog(ERROR, "cache lookup failed for function %u", funcoid);
810 :
811 5706 : tmp = SysCacheGetAttrNotNull(PROCOID, tuple, Anum_pg_proc_prosrc);
812 5706 : prosrc = TextDatumGetCString(tmp);
813 :
814 5706 : tmp = SysCacheGetAttrNotNull(PROCOID, tuple, Anum_pg_proc_probin);
815 5706 : probin = TextDatumGetCString(tmp);
816 :
817 5706 : (void) load_external_function(probin, prosrc, true, &libraryhandle);
818 5694 : (void) fetch_finfo_record(libraryhandle, prosrc);
819 :
820 5694 : ReleaseSysCache(tuple);
821 :
822 5694 : PG_RETURN_VOID();
823 : }
824 :
825 :
826 : /*
827 : * Validator for SQL language functions
828 : *
829 : * Parse it here in order to be sure that it contains no syntax errors.
830 : */
831 : Datum
832 8470 : fmgr_sql_validator(PG_FUNCTION_ARGS)
833 : {
834 8470 : Oid funcoid = PG_GETARG_OID(0);
835 : HeapTuple tuple;
836 : Form_pg_proc proc;
837 : List *raw_parsetree_list;
838 : List *querytree_list;
839 : ListCell *lc;
840 : bool isnull;
841 : Datum tmp;
842 : char *prosrc;
843 : parse_error_callback_arg callback_arg;
844 : ErrorContextCallback sqlerrcontext;
845 : bool haspolyarg;
846 : int i;
847 :
848 8470 : if (!CheckFunctionValidatorAccess(fcinfo->flinfo->fn_oid, funcoid))
849 0 : PG_RETURN_VOID();
850 :
851 8470 : tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcoid));
852 8470 : if (!HeapTupleIsValid(tuple))
853 0 : elog(ERROR, "cache lookup failed for function %u", funcoid);
854 8470 : proc = (Form_pg_proc) GETSTRUCT(tuple);
855 :
856 : /* Disallow pseudotype result */
857 : /* except for RECORD, VOID, or polymorphic */
858 8470 : if (get_typtype(proc->prorettype) == TYPTYPE_PSEUDO &&
859 1560 : proc->prorettype != RECORDOID &&
860 864 : proc->prorettype != VOIDOID &&
861 400 : !IsPolymorphicType(proc->prorettype))
862 6 : ereport(ERROR,
863 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
864 : errmsg("SQL functions cannot return type %s",
865 : format_type_be(proc->prorettype))));
866 :
867 : /* Disallow pseudotypes in arguments */
868 : /* except for polymorphic */
869 8464 : haspolyarg = false;
870 23372 : for (i = 0; i < proc->pronargs; i++)
871 : {
872 14908 : if (get_typtype(proc->proargtypes.values[i]) == TYPTYPE_PSEUDO)
873 : {
874 1076 : if (IsPolymorphicType(proc->proargtypes.values[i]))
875 1076 : haspolyarg = true;
876 : else
877 0 : ereport(ERROR,
878 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
879 : errmsg("SQL functions cannot have arguments of type %s",
880 : format_type_be(proc->proargtypes.values[i]))));
881 : }
882 : }
883 :
884 : /* Postpone body checks if !check_function_bodies */
885 8464 : if (check_function_bodies)
886 : {
887 7778 : tmp = SysCacheGetAttrNotNull(PROCOID, tuple, Anum_pg_proc_prosrc);
888 7778 : prosrc = TextDatumGetCString(tmp);
889 :
890 : /*
891 : * Setup error traceback support for ereport().
892 : */
893 7778 : callback_arg.proname = NameStr(proc->proname);
894 7778 : callback_arg.prosrc = prosrc;
895 :
896 7778 : sqlerrcontext.callback = sql_function_parse_error_callback;
897 7778 : sqlerrcontext.arg = &callback_arg;
898 7778 : sqlerrcontext.previous = error_context_stack;
899 7778 : error_context_stack = &sqlerrcontext;
900 :
901 : /* If we have prosqlbody, pay attention to that not prosrc */
902 7778 : tmp = SysCacheGetAttr(PROCOID, tuple, Anum_pg_proc_prosqlbody, &isnull);
903 7778 : if (!isnull)
904 : {
905 : Node *n;
906 : List *stored_query_list;
907 :
908 5428 : n = stringToNode(TextDatumGetCString(tmp));
909 5428 : if (IsA(n, List))
910 756 : stored_query_list = linitial(castNode(List, n));
911 : else
912 4672 : stored_query_list = list_make1(n);
913 :
914 5428 : querytree_list = NIL;
915 10856 : foreach(lc, stored_query_list)
916 : {
917 5428 : Query *parsetree = lfirst_node(Query, lc);
918 : List *querytree_sublist;
919 :
920 : /*
921 : * Typically, we'd have acquired locks already while parsing
922 : * the body of the CREATE FUNCTION command. However, a
923 : * validator function cannot assume that it's only called in
924 : * that context.
925 : */
926 5428 : AcquireRewriteLocks(parsetree, true, false);
927 5428 : querytree_sublist = pg_rewrite_query(parsetree);
928 5428 : querytree_list = lappend(querytree_list, querytree_sublist);
929 : }
930 : }
931 : else
932 : {
933 : /*
934 : * We can't do full prechecking of the function definition if
935 : * there are any polymorphic input types, because actual datatypes
936 : * of expression results will be unresolvable. The check will be
937 : * done at runtime instead.
938 : *
939 : * We can run the text through the raw parser though; this will at
940 : * least catch silly syntactic errors.
941 : */
942 2350 : raw_parsetree_list = pg_parse_query(prosrc);
943 2342 : querytree_list = NIL;
944 :
945 2342 : if (!haspolyarg)
946 : {
947 : /*
948 : * OK to do full precheck: analyze and rewrite the queries,
949 : * then verify the result type.
950 : */
951 : SQLFunctionParseInfoPtr pinfo;
952 :
953 : /* But first, set up parameter information */
954 1728 : pinfo = prepare_sql_fn_parse_info(tuple, NULL, InvalidOid);
955 :
956 3560 : foreach(lc, raw_parsetree_list)
957 : {
958 1844 : RawStmt *parsetree = lfirst_node(RawStmt, lc);
959 : List *querytree_sublist;
960 :
961 1844 : querytree_sublist = pg_analyze_and_rewrite_withcb(parsetree,
962 : prosrc,
963 : (ParserSetupHook) sql_fn_parser_setup,
964 : pinfo,
965 : NULL);
966 1832 : querytree_list = lappend(querytree_list,
967 : querytree_sublist);
968 : }
969 : }
970 : }
971 :
972 7758 : if (!haspolyarg)
973 : {
974 : Oid rettype;
975 : TupleDesc rettupdesc;
976 :
977 7144 : check_sql_fn_statements(querytree_list);
978 :
979 7138 : (void) get_func_result_type(funcoid, &rettype, &rettupdesc);
980 :
981 7138 : (void) check_sql_fn_retval(querytree_list,
982 : rettype, rettupdesc,
983 7138 : proc->prokind,
984 : false);
985 : }
986 :
987 7734 : error_context_stack = sqlerrcontext.previous;
988 : }
989 :
990 8420 : ReleaseSysCache(tuple);
991 :
992 8420 : PG_RETURN_VOID();
993 : }
994 :
995 : /*
996 : * Error context callback for handling errors in SQL function definitions
997 : */
998 : static void
999 44 : sql_function_parse_error_callback(void *arg)
1000 : {
1001 44 : parse_error_callback_arg *callback_arg = (parse_error_callback_arg *) arg;
1002 :
1003 : /* See if it's a syntax error; if so, transpose to CREATE FUNCTION */
1004 44 : if (!function_parse_error_transpose(callback_arg->prosrc))
1005 : {
1006 : /* If it's not a syntax error, push info onto context stack */
1007 24 : errcontext("SQL function \"%s\"", callback_arg->proname);
1008 : }
1009 44 : }
1010 :
1011 : /*
1012 : * Adjust a syntax error occurring inside the function body of a CREATE
1013 : * FUNCTION or DO command. This can be used by any function validator or
1014 : * anonymous-block handler, not only for SQL-language functions.
1015 : * It is assumed that the syntax error position is initially relative to the
1016 : * function body string (as passed in). If possible, we adjust the position
1017 : * to reference the original command text; if we can't manage that, we set
1018 : * up an "internal query" syntax error instead.
1019 : *
1020 : * Returns true if a syntax error was processed, false if not.
1021 : */
1022 : bool
1023 274 : function_parse_error_transpose(const char *prosrc)
1024 : {
1025 : int origerrposition;
1026 : int newerrposition;
1027 :
1028 : /*
1029 : * Nothing to do unless we are dealing with a syntax error that has a
1030 : * cursor position.
1031 : *
1032 : * Some PLs may prefer to report the error position as an internal error
1033 : * to begin with, so check that too.
1034 : */
1035 274 : origerrposition = geterrposition();
1036 274 : if (origerrposition <= 0)
1037 : {
1038 242 : origerrposition = getinternalerrposition();
1039 242 : if (origerrposition <= 0)
1040 70 : return false;
1041 : }
1042 :
1043 : /* We can get the original query text from the active portal (hack...) */
1044 204 : if (ActivePortal && ActivePortal->status == PORTAL_ACTIVE)
1045 204 : {
1046 204 : const char *queryText = ActivePortal->sourceText;
1047 :
1048 : /* Try to locate the prosrc in the original text */
1049 204 : newerrposition = match_prosrc_to_query(prosrc, queryText,
1050 : origerrposition);
1051 : }
1052 : else
1053 : {
1054 : /*
1055 : * Quietly give up if no ActivePortal. This is an unusual situation
1056 : * but it can happen in, e.g., logical replication workers.
1057 : */
1058 0 : newerrposition = -1;
1059 : }
1060 :
1061 204 : if (newerrposition > 0)
1062 : {
1063 : /* Successful, so fix error position to reference original query */
1064 202 : errposition(newerrposition);
1065 : /* Get rid of any report of the error as an "internal query" */
1066 202 : internalerrposition(0);
1067 202 : internalerrquery(NULL);
1068 : }
1069 : else
1070 : {
1071 : /*
1072 : * If unsuccessful, convert the position to an internal position
1073 : * marker and give the function text as the internal query.
1074 : */
1075 2 : errposition(0);
1076 2 : internalerrposition(origerrposition);
1077 2 : internalerrquery(prosrc);
1078 : }
1079 :
1080 204 : return true;
1081 : }
1082 :
1083 : /*
1084 : * Try to locate the string literal containing the function body in the
1085 : * given text of the CREATE FUNCTION or DO command. If successful, return
1086 : * the character (not byte) index within the command corresponding to the
1087 : * given character index within the literal. If not successful, return 0.
1088 : */
1089 : static int
1090 204 : match_prosrc_to_query(const char *prosrc, const char *queryText,
1091 : int cursorpos)
1092 : {
1093 : /*
1094 : * Rather than fully parsing the original command, we just scan the
1095 : * command looking for $prosrc$ or 'prosrc'. This could be fooled (though
1096 : * not in any very probable scenarios), so fail if we find more than one
1097 : * match.
1098 : */
1099 204 : int prosrclen = strlen(prosrc);
1100 204 : int querylen = strlen(queryText);
1101 204 : int matchpos = 0;
1102 : int curpos;
1103 : int newcursorpos;
1104 :
1105 14024 : for (curpos = 0; curpos < querylen - prosrclen; curpos++)
1106 : {
1107 13820 : if (queryText[curpos] == '$' &&
1108 380 : strncmp(prosrc, &queryText[curpos + 1], prosrclen) == 0 &&
1109 190 : queryText[curpos + 1 + prosrclen] == '$')
1110 : {
1111 : /*
1112 : * Found a $foo$ match. Since there are no embedded quoting
1113 : * characters in a dollar-quoted literal, we don't have to do any
1114 : * fancy arithmetic; just offset by the starting position.
1115 : */
1116 190 : if (matchpos)
1117 0 : return 0; /* multiple matches, fail */
1118 190 : matchpos = pg_mbstrlen_with_len(queryText, curpos + 1)
1119 : + cursorpos;
1120 : }
1121 13642 : else if (queryText[curpos] == '\'' &&
1122 12 : match_prosrc_to_literal(prosrc, &queryText[curpos + 1],
1123 : cursorpos, &newcursorpos))
1124 : {
1125 : /*
1126 : * Found a 'foo' match. match_prosrc_to_literal() has adjusted
1127 : * for any quotes or backslashes embedded in the literal.
1128 : */
1129 12 : if (matchpos)
1130 0 : return 0; /* multiple matches, fail */
1131 12 : matchpos = pg_mbstrlen_with_len(queryText, curpos + 1)
1132 12 : + newcursorpos;
1133 : }
1134 : }
1135 :
1136 204 : return matchpos;
1137 : }
1138 :
1139 : /*
1140 : * Try to match the given source text to a single-quoted literal.
1141 : * If successful, adjust newcursorpos to correspond to the character
1142 : * (not byte) index corresponding to cursorpos in the source text.
1143 : *
1144 : * At entry, literal points just past a ' character. We must check for the
1145 : * trailing quote.
1146 : */
1147 : static bool
1148 12 : match_prosrc_to_literal(const char *prosrc, const char *literal,
1149 : int cursorpos, int *newcursorpos)
1150 : {
1151 12 : int newcp = cursorpos;
1152 : int chlen;
1153 :
1154 : /*
1155 : * This implementation handles backslashes and doubled quotes in the
1156 : * string literal. It does not handle the SQL syntax for literals
1157 : * continued across line boundaries.
1158 : *
1159 : * We do the comparison a character at a time, not a byte at a time, so
1160 : * that we can do the correct cursorpos math.
1161 : */
1162 144 : while (*prosrc)
1163 : {
1164 132 : cursorpos--; /* characters left before cursor */
1165 :
1166 : /*
1167 : * Check for backslashes and doubled quotes in the literal; adjust
1168 : * newcp when one is found before the cursor.
1169 : */
1170 132 : if (*literal == '\\')
1171 : {
1172 0 : literal++;
1173 0 : if (cursorpos > 0)
1174 0 : newcp++;
1175 : }
1176 132 : else if (*literal == '\'')
1177 : {
1178 0 : if (literal[1] != '\'')
1179 0 : goto fail;
1180 0 : literal++;
1181 0 : if (cursorpos > 0)
1182 0 : newcp++;
1183 : }
1184 132 : chlen = pg_mblen(prosrc);
1185 132 : if (strncmp(prosrc, literal, chlen) != 0)
1186 0 : goto fail;
1187 132 : prosrc += chlen;
1188 132 : literal += chlen;
1189 : }
1190 :
1191 12 : if (*literal == '\'' && literal[1] != '\'')
1192 : {
1193 : /* success */
1194 12 : *newcursorpos = newcp;
1195 12 : return true;
1196 : }
1197 :
1198 0 : fail:
1199 : /* Must set *newcursorpos to suppress compiler warning */
1200 0 : *newcursorpos = newcp;
1201 0 : return false;
1202 : }
1203 :
1204 : List *
1205 120 : oid_array_to_list(Datum datum)
1206 : {
1207 120 : ArrayType *array = DatumGetArrayTypeP(datum);
1208 : Datum *values;
1209 : int nelems;
1210 : int i;
1211 120 : List *result = NIL;
1212 :
1213 120 : deconstruct_array_builtin(array, OIDOID, &values, NULL, &nelems);
1214 244 : for (i = 0; i < nelems; i++)
1215 124 : result = lappend_oid(result, values[i]);
1216 120 : return result;
1217 : }
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