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) 1996-2026, 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/namespace.h"
24 : #include "catalog/objectaccess.h"
25 : #include "catalog/pg_language.h"
26 : #include "catalog/pg_namespace.h"
27 : #include "catalog/pg_proc.h"
28 : #include "catalog/pg_transform.h"
29 : #include "catalog/pg_type.h"
30 : #include "executor/functions.h"
31 : #include "funcapi.h"
32 : #include "mb/pg_wchar.h"
33 : #include "miscadmin.h"
34 : #include "nodes/nodeFuncs.h"
35 : #include "parser/parse_coerce.h"
36 : #include "pgstat.h"
37 : #include "rewrite/rewriteHandler.h"
38 : #include "tcop/pquery.h"
39 : #include "tcop/tcopprot.h"
40 : #include "utils/acl.h"
41 : #include "utils/builtins.h"
42 : #include "utils/lsyscache.h"
43 : #include "utils/regproc.h"
44 : #include "utils/rel.h"
45 : #include "utils/syscache.h"
46 :
47 :
48 : typedef struct
49 : {
50 : char *proname;
51 : char *prosrc;
52 : } parse_error_callback_arg;
53 :
54 : static void sql_function_parse_error_callback(void *arg);
55 : static int match_prosrc_to_query(const char *prosrc, const char *queryText,
56 : int cursorpos);
57 : static bool match_prosrc_to_literal(const char *prosrc, const char *literal,
58 : int cursorpos, int *newcursorpos);
59 :
60 :
61 : /* ----------------------------------------------------------------
62 : * ProcedureCreate
63 : *
64 : * procedureName: string name of routine (proname)
65 : * procNamespace: OID of namespace (pronamespace)
66 : * replace: true to allow replacement of an existing pg_proc entry
67 : * returnsSet: returns set? (proretset)
68 : * returnType: OID of result type (prorettype)
69 : * proowner: OID of owner role (proowner)
70 : * languageObjectId: OID of function language (prolang)
71 : * languageValidator: OID of validator function to apply, if any
72 : * prosrc: string form of function definition (prosrc)
73 : * probin: string form of binary reference, or NULL (probin)
74 : * prosqlbody: Node tree of pre-parsed SQL body, or NULL (prosqlbody)
75 : * prokind: function/aggregate/procedure/etc code (prokind)
76 : * security_definer: security definer? (prosecdef)
77 : * isLeakProof: leak proof? (proleakproof)
78 : * isStrict: strict? (proisstrict)
79 : * volatility: volatility code (provolatile)
80 : * parallel: parallel safety code (proparallel)
81 : * parameterTypes: input parameter types, as an oidvector (proargtypes)
82 : * allParameterTypes: all parameter types, as an OID array (proallargtypes)
83 : * parameterModes: parameter modes, as a "char" array (proargmodes)
84 : * parameterNames: parameter names, as a text array (proargnames)
85 : * parameterDefaults: defaults, as a List of Node trees (proargdefaults)
86 : * trftypes: transformable type OIDs, as an OID array (protrftypes)
87 : * trfoids: List of transform OIDs that routine should depend on
88 : * proconfig: GUC set clauses, as a text array (proconfig)
89 : * prosupport: OID of support function, if any (prosupport)
90 : * procost: cost factor (procost)
91 : * prorows: estimated output rows for a SRF (prorows)
92 : *
93 : * Note: allParameterTypes, parameterModes, parameterNames, trftypes, and proconfig
94 : * are either arrays of the proper types or NULL. We declare them Datum,
95 : * not "ArrayType *", to avoid importing array.h into pg_proc.h.
96 : * ----------------------------------------------------------------
97 : */
98 : ObjectAddress
99 13675 : ProcedureCreate(const char *procedureName,
100 : Oid procNamespace,
101 : bool replace,
102 : bool returnsSet,
103 : Oid returnType,
104 : Oid proowner,
105 : Oid languageObjectId,
106 : Oid languageValidator,
107 : const char *prosrc,
108 : const char *probin,
109 : Node *prosqlbody,
110 : char prokind,
111 : bool security_definer,
112 : bool isLeakProof,
113 : bool isStrict,
114 : char volatility,
115 : char parallel,
116 : oidvector *parameterTypes,
117 : Datum allParameterTypes,
118 : Datum parameterModes,
119 : Datum parameterNames,
120 : List *parameterDefaults,
121 : Datum trftypes,
122 : List *trfoids,
123 : Datum proconfig,
124 : Oid prosupport,
125 : float4 procost,
126 : float4 prorows)
127 : {
128 : Oid retval;
129 : int parameterCount;
130 : int allParamCount;
131 : Oid *allParams;
132 13675 : char *paramModes = NULL;
133 13675 : Oid variadicType = InvalidOid;
134 13675 : Acl *proacl = NULL;
135 : Relation rel;
136 : HeapTuple tup;
137 : HeapTuple oldtup;
138 : bool nulls[Natts_pg_proc];
139 : Datum values[Natts_pg_proc];
140 : bool replaces[Natts_pg_proc];
141 : NameData procname;
142 : TupleDesc tupDesc;
143 : bool is_update;
144 : ObjectAddress myself,
145 : referenced,
146 : temp_object;
147 : char *detailmsg;
148 : int i;
149 : ObjectAddresses *addrs;
150 :
151 : /*
152 : * sanity checks
153 : */
154 : Assert(prosrc);
155 :
156 13675 : parameterCount = parameterTypes->dim1;
157 13675 : if (parameterCount < 0 || parameterCount > FUNC_MAX_ARGS)
158 0 : ereport(ERROR,
159 : (errcode(ERRCODE_TOO_MANY_ARGUMENTS),
160 : errmsg_plural("functions cannot have more than %d argument",
161 : "functions cannot have more than %d arguments",
162 : FUNC_MAX_ARGS,
163 : FUNC_MAX_ARGS)));
164 : /* note: the above is correct, we do NOT count output arguments */
165 :
166 : /* Deconstruct array inputs */
167 13675 : if (allParameterTypes != PointerGetDatum(NULL))
168 : {
169 : /*
170 : * We expect the array to be a 1-D OID array; verify that. We don't
171 : * need to use deconstruct_array() since the array data is just going
172 : * to look like a C array of OID values.
173 : */
174 1433 : ArrayType *allParamArray = (ArrayType *) DatumGetPointer(allParameterTypes);
175 :
176 1433 : allParamCount = ARR_DIMS(allParamArray)[0];
177 1433 : if (ARR_NDIM(allParamArray) != 1 ||
178 1433 : allParamCount <= 0 ||
179 1433 : ARR_HASNULL(allParamArray) ||
180 1433 : ARR_ELEMTYPE(allParamArray) != OIDOID)
181 0 : elog(ERROR, "allParameterTypes is not a 1-D Oid array");
182 1433 : allParams = (Oid *) ARR_DATA_PTR(allParamArray);
183 : Assert(allParamCount >= parameterCount);
184 : /* we assume caller got the contents right */
185 : }
186 : else
187 : {
188 12242 : allParamCount = parameterCount;
189 12242 : allParams = parameterTypes->values;
190 : }
191 :
192 13675 : if (parameterModes != PointerGetDatum(NULL))
193 : {
194 : /*
195 : * We expect the array to be a 1-D CHAR array; verify that. We don't
196 : * need to use deconstruct_array() since the array data is just going
197 : * to look like a C array of char values.
198 : */
199 1433 : ArrayType *modesArray = (ArrayType *) DatumGetPointer(parameterModes);
200 :
201 1433 : if (ARR_NDIM(modesArray) != 1 ||
202 1433 : ARR_DIMS(modesArray)[0] != allParamCount ||
203 1433 : ARR_HASNULL(modesArray) ||
204 1433 : ARR_ELEMTYPE(modesArray) != CHAROID)
205 0 : elog(ERROR, "parameterModes is not a 1-D char array");
206 1433 : paramModes = (char *) ARR_DATA_PTR(modesArray);
207 : }
208 :
209 : /*
210 : * Do not allow polymorphic return type unless there is a polymorphic
211 : * input argument that we can use to deduce the actual return type.
212 : */
213 13675 : detailmsg = check_valid_polymorphic_signature(returnType,
214 13675 : parameterTypes->values,
215 : parameterCount);
216 13675 : if (detailmsg)
217 39 : ereport(ERROR,
218 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
219 : errmsg("cannot determine result data type"),
220 : errdetail_internal("%s", detailmsg)));
221 :
222 : /*
223 : * Also, do not allow return type INTERNAL unless at least one input
224 : * argument is INTERNAL.
225 : */
226 13636 : detailmsg = check_valid_internal_signature(returnType,
227 13636 : parameterTypes->values,
228 : parameterCount);
229 13636 : if (detailmsg)
230 0 : ereport(ERROR,
231 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
232 : errmsg("unsafe use of pseudo-type \"internal\""),
233 : errdetail_internal("%s", detailmsg)));
234 :
235 : /*
236 : * Apply the same tests to any OUT arguments.
237 : */
238 13636 : if (allParameterTypes != PointerGetDatum(NULL))
239 : {
240 10542 : for (i = 0; i < allParamCount; i++)
241 : {
242 9133 : if (paramModes == NULL ||
243 9133 : paramModes[i] == PROARGMODE_IN ||
244 6893 : paramModes[i] == PROARGMODE_VARIADIC)
245 2574 : continue; /* ignore input-only params */
246 :
247 6559 : detailmsg = check_valid_polymorphic_signature(allParams[i],
248 6559 : parameterTypes->values,
249 : parameterCount);
250 6559 : if (detailmsg)
251 24 : ereport(ERROR,
252 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
253 : errmsg("cannot determine result data type"),
254 : errdetail_internal("%s", detailmsg)));
255 6535 : detailmsg = check_valid_internal_signature(allParams[i],
256 6535 : parameterTypes->values,
257 : parameterCount);
258 6535 : if (detailmsg)
259 0 : ereport(ERROR,
260 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
261 : errmsg("unsafe use of pseudo-type \"internal\""),
262 : errdetail_internal("%s", detailmsg)));
263 : }
264 : }
265 :
266 : /* Identify variadic argument type, if any */
267 13612 : if (paramModes != NULL)
268 : {
269 : /*
270 : * Only the last input parameter can be variadic; if it is, save its
271 : * element type. Errors here are just elog since caller should have
272 : * checked this already.
273 : */
274 10488 : for (i = 0; i < allParamCount; i++)
275 : {
276 9079 : switch (paramModes[i])
277 : {
278 2302 : case PROARGMODE_IN:
279 : case PROARGMODE_INOUT:
280 2302 : if (OidIsValid(variadicType))
281 0 : elog(ERROR, "variadic parameter must be last");
282 2302 : break;
283 6228 : case PROARGMODE_OUT:
284 6228 : if (OidIsValid(variadicType) && prokind == PROKIND_PROCEDURE)
285 0 : elog(ERROR, "variadic parameter must be last");
286 6228 : break;
287 215 : case PROARGMODE_TABLE:
288 : /* okay */
289 215 : break;
290 334 : case PROARGMODE_VARIADIC:
291 334 : if (OidIsValid(variadicType))
292 0 : elog(ERROR, "variadic parameter must be last");
293 334 : switch (allParams[i])
294 : {
295 4 : case ANYOID:
296 4 : variadicType = ANYOID;
297 4 : break;
298 20 : case ANYARRAYOID:
299 20 : variadicType = ANYELEMENTOID;
300 20 : break;
301 11 : case ANYCOMPATIBLEARRAYOID:
302 11 : variadicType = ANYCOMPATIBLEOID;
303 11 : break;
304 299 : default:
305 299 : variadicType = get_element_type(allParams[i]);
306 299 : if (!OidIsValid(variadicType))
307 0 : elog(ERROR, "variadic parameter is not an array");
308 299 : break;
309 : }
310 334 : break;
311 0 : default:
312 0 : elog(ERROR, "invalid parameter mode '%c'", paramModes[i]);
313 : break;
314 : }
315 : }
316 : }
317 :
318 : /*
319 : * All seems OK; prepare the data to be inserted into pg_proc.
320 : */
321 :
322 421972 : for (i = 0; i < Natts_pg_proc; ++i)
323 : {
324 408360 : nulls[i] = false;
325 408360 : values[i] = (Datum) 0;
326 408360 : replaces[i] = true;
327 : }
328 :
329 13612 : namestrcpy(&procname, procedureName);
330 13612 : values[Anum_pg_proc_proname - 1] = NameGetDatum(&procname);
331 13612 : values[Anum_pg_proc_pronamespace - 1] = ObjectIdGetDatum(procNamespace);
332 13612 : values[Anum_pg_proc_proowner - 1] = ObjectIdGetDatum(proowner);
333 13612 : values[Anum_pg_proc_prolang - 1] = ObjectIdGetDatum(languageObjectId);
334 13612 : values[Anum_pg_proc_procost - 1] = Float4GetDatum(procost);
335 13612 : values[Anum_pg_proc_prorows - 1] = Float4GetDatum(prorows);
336 13612 : values[Anum_pg_proc_provariadic - 1] = ObjectIdGetDatum(variadicType);
337 13612 : values[Anum_pg_proc_prosupport - 1] = ObjectIdGetDatum(prosupport);
338 13612 : values[Anum_pg_proc_prokind - 1] = CharGetDatum(prokind);
339 13612 : values[Anum_pg_proc_prosecdef - 1] = BoolGetDatum(security_definer);
340 13612 : values[Anum_pg_proc_proleakproof - 1] = BoolGetDatum(isLeakProof);
341 13612 : values[Anum_pg_proc_proisstrict - 1] = BoolGetDatum(isStrict);
342 13612 : values[Anum_pg_proc_proretset - 1] = BoolGetDatum(returnsSet);
343 13612 : values[Anum_pg_proc_provolatile - 1] = CharGetDatum(volatility);
344 13612 : values[Anum_pg_proc_proparallel - 1] = CharGetDatum(parallel);
345 13612 : values[Anum_pg_proc_pronargs - 1] = UInt16GetDatum(parameterCount);
346 13612 : values[Anum_pg_proc_pronargdefaults - 1] = UInt16GetDatum(list_length(parameterDefaults));
347 13612 : values[Anum_pg_proc_prorettype - 1] = ObjectIdGetDatum(returnType);
348 13612 : values[Anum_pg_proc_proargtypes - 1] = PointerGetDatum(parameterTypes);
349 13612 : if (allParameterTypes != PointerGetDatum(NULL))
350 1409 : values[Anum_pg_proc_proallargtypes - 1] = allParameterTypes;
351 : else
352 12203 : nulls[Anum_pg_proc_proallargtypes - 1] = true;
353 13612 : if (parameterModes != PointerGetDatum(NULL))
354 1409 : values[Anum_pg_proc_proargmodes - 1] = parameterModes;
355 : else
356 12203 : nulls[Anum_pg_proc_proargmodes - 1] = true;
357 13612 : if (parameterNames != PointerGetDatum(NULL))
358 4387 : values[Anum_pg_proc_proargnames - 1] = parameterNames;
359 : else
360 9225 : nulls[Anum_pg_proc_proargnames - 1] = true;
361 13612 : if (parameterDefaults != NIL)
362 2045 : values[Anum_pg_proc_proargdefaults - 1] = CStringGetTextDatum(nodeToString(parameterDefaults));
363 : else
364 11567 : nulls[Anum_pg_proc_proargdefaults - 1] = true;
365 13612 : if (trftypes != PointerGetDatum(NULL))
366 59 : values[Anum_pg_proc_protrftypes - 1] = trftypes;
367 : else
368 13553 : nulls[Anum_pg_proc_protrftypes - 1] = true;
369 13612 : values[Anum_pg_proc_prosrc - 1] = CStringGetTextDatum(prosrc);
370 13612 : if (probin)
371 3572 : values[Anum_pg_proc_probin - 1] = CStringGetTextDatum(probin);
372 : else
373 10040 : nulls[Anum_pg_proc_probin - 1] = true;
374 13612 : if (prosqlbody)
375 2887 : values[Anum_pg_proc_prosqlbody - 1] = CStringGetTextDatum(nodeToString(prosqlbody));
376 : else
377 10725 : nulls[Anum_pg_proc_prosqlbody - 1] = true;
378 13612 : if (proconfig != PointerGetDatum(NULL))
379 48 : values[Anum_pg_proc_proconfig - 1] = proconfig;
380 : else
381 13564 : nulls[Anum_pg_proc_proconfig - 1] = true;
382 : /* proacl will be determined later */
383 :
384 13612 : rel = table_open(ProcedureRelationId, RowExclusiveLock);
385 13612 : tupDesc = RelationGetDescr(rel);
386 :
387 : /* Check for pre-existing definition */
388 13612 : oldtup = SearchSysCache3(PROCNAMEARGSNSP,
389 : PointerGetDatum(procedureName),
390 : PointerGetDatum(parameterTypes),
391 : ObjectIdGetDatum(procNamespace));
392 :
393 13612 : if (HeapTupleIsValid(oldtup))
394 : {
395 : /* There is one; okay to replace it? */
396 4579 : Form_pg_proc oldproc = (Form_pg_proc) GETSTRUCT(oldtup);
397 : Datum proargnames;
398 : bool isnull;
399 : const char *dropcmd;
400 :
401 4579 : if (!replace)
402 0 : ereport(ERROR,
403 : (errcode(ERRCODE_DUPLICATE_FUNCTION),
404 : errmsg("function \"%s\" already exists with same argument types",
405 : procedureName)));
406 4579 : if (!object_ownercheck(ProcedureRelationId, oldproc->oid, proowner))
407 0 : aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_FUNCTION,
408 : procedureName);
409 :
410 : /* Not okay to change routine kind */
411 4579 : if (oldproc->prokind != prokind)
412 9 : ereport(ERROR,
413 : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
414 : errmsg("cannot change routine kind"),
415 : (oldproc->prokind == PROKIND_AGGREGATE ?
416 : errdetail("\"%s\" is an aggregate function.", procedureName) :
417 : oldproc->prokind == PROKIND_FUNCTION ?
418 : errdetail("\"%s\" is a function.", procedureName) :
419 : oldproc->prokind == PROKIND_PROCEDURE ?
420 : errdetail("\"%s\" is a procedure.", procedureName) :
421 : oldproc->prokind == PROKIND_WINDOW ?
422 : errdetail("\"%s\" is a window function.", procedureName) :
423 : 0)));
424 :
425 4570 : dropcmd = (prokind == PROKIND_PROCEDURE ? "DROP PROCEDURE" :
426 : prokind == PROKIND_AGGREGATE ? "DROP AGGREGATE" :
427 : "DROP FUNCTION");
428 :
429 : /*
430 : * Not okay to change the return type of the existing proc, since
431 : * existing rules, views, etc may depend on the return type.
432 : *
433 : * In case of a procedure, a changing return type means that whether
434 : * the procedure has output parameters was changed. Since there is no
435 : * user visible return type, we produce a more specific error message.
436 : */
437 4570 : if (returnType != oldproc->prorettype ||
438 4564 : returnsSet != oldproc->proretset)
439 6 : ereport(ERROR,
440 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
441 : prokind == PROKIND_PROCEDURE
442 : ? errmsg("cannot change whether a procedure has output parameters")
443 : : errmsg("cannot change return type of existing function"),
444 :
445 : /*
446 : * translator: first %s is DROP FUNCTION, DROP PROCEDURE, or DROP
447 : * AGGREGATE
448 : */
449 : errhint("Use %s %s first.",
450 : dropcmd,
451 : format_procedure(oldproc->oid))));
452 :
453 : /*
454 : * If it returns RECORD, check for possible change of record type
455 : * implied by OUT parameters
456 : */
457 4564 : if (returnType == RECORDOID)
458 : {
459 : TupleDesc olddesc;
460 : TupleDesc newdesc;
461 :
462 490 : olddesc = build_function_result_tupdesc_t(oldtup);
463 490 : newdesc = build_function_result_tupdesc_d(prokind,
464 : allParameterTypes,
465 : parameterModes,
466 : parameterNames);
467 490 : if (olddesc == NULL && newdesc == NULL)
468 : /* ok, both are runtime-defined RECORDs */ ;
469 478 : else if (olddesc == NULL || newdesc == NULL ||
470 478 : !equalRowTypes(olddesc, newdesc))
471 0 : ereport(ERROR,
472 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
473 : errmsg("cannot change return type of existing function"),
474 : errdetail("Row type defined by OUT parameters is different."),
475 : /* translator: first %s is DROP FUNCTION or DROP PROCEDURE */
476 : errhint("Use %s %s first.",
477 : dropcmd,
478 : format_procedure(oldproc->oid))));
479 : }
480 :
481 : /*
482 : * If there were any named input parameters, check to make sure the
483 : * names have not been changed, as this could break existing calls. We
484 : * allow adding names to formerly unnamed parameters, though.
485 : */
486 4564 : proargnames = SysCacheGetAttr(PROCNAMEARGSNSP, oldtup,
487 : Anum_pg_proc_proargnames,
488 : &isnull);
489 4564 : if (!isnull)
490 : {
491 : Datum proargmodes;
492 : char **old_arg_names;
493 : char **new_arg_names;
494 : int n_old_arg_names;
495 : int n_new_arg_names;
496 : int j;
497 :
498 767 : proargmodes = SysCacheGetAttr(PROCNAMEARGSNSP, oldtup,
499 : Anum_pg_proc_proargmodes,
500 : &isnull);
501 767 : if (isnull)
502 280 : proargmodes = PointerGetDatum(NULL); /* just to be sure */
503 :
504 767 : n_old_arg_names = get_func_input_arg_names(proargnames,
505 : proargmodes,
506 : &old_arg_names);
507 767 : n_new_arg_names = get_func_input_arg_names(parameterNames,
508 : parameterModes,
509 : &new_arg_names);
510 2958 : for (j = 0; j < n_old_arg_names; j++)
511 : {
512 2200 : if (old_arg_names[j] == NULL)
513 3 : continue;
514 2197 : if (j >= n_new_arg_names || new_arg_names[j] == NULL ||
515 2194 : strcmp(old_arg_names[j], new_arg_names[j]) != 0)
516 9 : ereport(ERROR,
517 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
518 : errmsg("cannot change name of input parameter \"%s\"",
519 : old_arg_names[j]),
520 : /* translator: first %s is DROP FUNCTION or DROP PROCEDURE */
521 : errhint("Use %s %s first.",
522 : dropcmd,
523 : format_procedure(oldproc->oid))));
524 : }
525 : }
526 :
527 : /*
528 : * If there are existing defaults, check compatibility: redefinition
529 : * must not remove any defaults nor change their types. (Removing a
530 : * default might cause a function to fail to satisfy an existing call.
531 : * Changing type would only be possible if the associated parameter is
532 : * polymorphic, and in such cases a change of default type might alter
533 : * the resolved output type of existing calls.)
534 : */
535 4555 : if (oldproc->pronargdefaults != 0)
536 : {
537 : Datum proargdefaults;
538 : List *oldDefaults;
539 : ListCell *oldlc;
540 : ListCell *newlc;
541 :
542 3 : if (list_length(parameterDefaults) < oldproc->pronargdefaults)
543 3 : ereport(ERROR,
544 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
545 : errmsg("cannot remove parameter defaults from existing function"),
546 : /* translator: first %s is DROP FUNCTION or DROP PROCEDURE */
547 : errhint("Use %s %s first.",
548 : dropcmd,
549 : format_procedure(oldproc->oid))));
550 :
551 0 : proargdefaults = SysCacheGetAttrNotNull(PROCNAMEARGSNSP, oldtup,
552 : Anum_pg_proc_proargdefaults);
553 0 : oldDefaults = castNode(List, stringToNode(TextDatumGetCString(proargdefaults)));
554 : Assert(list_length(oldDefaults) == oldproc->pronargdefaults);
555 :
556 : /* new list can have more defaults than old, advance over 'em */
557 0 : newlc = list_nth_cell(parameterDefaults,
558 0 : list_length(parameterDefaults) -
559 0 : oldproc->pronargdefaults);
560 :
561 0 : foreach(oldlc, oldDefaults)
562 : {
563 0 : Node *oldDef = (Node *) lfirst(oldlc);
564 0 : Node *newDef = (Node *) lfirst(newlc);
565 :
566 0 : if (exprType(oldDef) != exprType(newDef))
567 0 : ereport(ERROR,
568 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
569 : errmsg("cannot change data type of existing parameter default value"),
570 : /* translator: first %s is DROP FUNCTION or DROP PROCEDURE */
571 : errhint("Use %s %s first.",
572 : dropcmd,
573 : format_procedure(oldproc->oid))));
574 0 : newlc = lnext(parameterDefaults, newlc);
575 : }
576 : }
577 :
578 : /*
579 : * Do not change existing oid, ownership or permissions, either. Note
580 : * dependency-update code below has to agree with this decision.
581 : */
582 4552 : replaces[Anum_pg_proc_oid - 1] = false;
583 4552 : replaces[Anum_pg_proc_proowner - 1] = false;
584 4552 : replaces[Anum_pg_proc_proacl - 1] = false;
585 :
586 : /* Okay, do it... */
587 4552 : tup = heap_modify_tuple(oldtup, tupDesc, values, nulls, replaces);
588 4552 : CatalogTupleUpdate(rel, &tup->t_self, tup);
589 :
590 4552 : ReleaseSysCache(oldtup);
591 4552 : is_update = true;
592 : }
593 : else
594 : {
595 : /* Creating a new procedure */
596 : Oid newOid;
597 :
598 : /* First, get default permissions and set up proacl */
599 9033 : proacl = get_user_default_acl(OBJECT_FUNCTION, proowner,
600 : procNamespace);
601 9033 : if (proacl != NULL)
602 9 : values[Anum_pg_proc_proacl - 1] = PointerGetDatum(proacl);
603 : else
604 9024 : nulls[Anum_pg_proc_proacl - 1] = true;
605 :
606 9033 : newOid = GetNewOidWithIndex(rel, ProcedureOidIndexId,
607 : Anum_pg_proc_oid);
608 9033 : values[Anum_pg_proc_oid - 1] = ObjectIdGetDatum(newOid);
609 9033 : tup = heap_form_tuple(tupDesc, values, nulls);
610 9033 : CatalogTupleInsert(rel, tup);
611 9033 : is_update = false;
612 : }
613 :
614 :
615 13585 : retval = ((Form_pg_proc) GETSTRUCT(tup))->oid;
616 :
617 : /*
618 : * Create dependencies for the new function. If we are updating an
619 : * existing function, first delete any existing pg_depend entries.
620 : * (However, since we are not changing ownership or permissions, the
621 : * shared dependencies do *not* need to change, and we leave them alone.)
622 : */
623 13585 : if (is_update)
624 4552 : deleteDependencyRecordsFor(ProcedureRelationId, retval, true);
625 :
626 13585 : addrs = new_object_addresses();
627 :
628 13585 : ObjectAddressSet(myself, ProcedureRelationId, retval);
629 :
630 : /* dependency on namespace */
631 13585 : ObjectAddressSet(referenced, NamespaceRelationId, procNamespace);
632 13585 : add_exact_object_address(&referenced, addrs);
633 :
634 : /* dependency on implementation language */
635 13585 : ObjectAddressSet(referenced, LanguageRelationId, languageObjectId);
636 13585 : add_exact_object_address(&referenced, addrs);
637 :
638 : /* dependency on return type */
639 13585 : ObjectAddressSet(referenced, TypeRelationId, returnType);
640 13585 : add_exact_object_address(&referenced, addrs);
641 :
642 : /* dependency on parameter types */
643 43451 : for (i = 0; i < allParamCount; i++)
644 : {
645 29866 : ObjectAddressSet(referenced, TypeRelationId, allParams[i]);
646 29866 : add_exact_object_address(&referenced, addrs);
647 : }
648 :
649 : /* dependency on transforms, if any */
650 27231 : foreach_oid(transformid, trfoids)
651 : {
652 61 : ObjectAddressSet(referenced, TransformRelationId, transformid);
653 61 : add_exact_object_address(&referenced, addrs);
654 : }
655 :
656 : /* dependency on support function, if any */
657 13585 : if (OidIsValid(prosupport))
658 : {
659 55 : ObjectAddressSet(referenced, ProcedureRelationId, prosupport);
660 55 : add_exact_object_address(&referenced, addrs);
661 : }
662 :
663 : /* dependencies appearing in new-style SQL routine body */
664 13585 : if (languageObjectId == SQLlanguageId && prosqlbody)
665 2887 : collectDependenciesOfExpr(addrs, prosqlbody, NIL);
666 :
667 : /* dependency on parameter default expressions */
668 13585 : if (parameterDefaults)
669 2039 : collectDependenciesOfExpr(addrs, (Node *) parameterDefaults, NIL);
670 :
671 : /*
672 : * Now that we have all the normal dependencies, thumb through them and
673 : * warn if any are to temporary objects. This informs the user if their
674 : * supposedly non-temp function will silently go away at session exit, due
675 : * to a dependency on a temp object. However, do not complain when a
676 : * function created in our own pg_temp namespace refers to other objects
677 : * in that namespace, since then they'll have similar lifespans anyway.
678 : */
679 13585 : if (find_temp_object(addrs, isTempNamespace(procNamespace), &temp_object))
680 32 : ereport(NOTICE,
681 : (errmsg("function \"%s\" will be effectively temporary",
682 : procedureName),
683 : errdetail("It depends on temporary %s.",
684 : getObjectDescription(&temp_object, false))));
685 :
686 : /*
687 : * Now record all normal dependencies at once. This will also remove any
688 : * duplicates in the list. (Role and extension dependencies are handled
689 : * separately below. Role dependencies would have to be separate anyway
690 : * since they are shared dependencies. An extension dependency could be
691 : * folded into the addrs list, but pg_depend.c doesn't make that easy, and
692 : * it won't duplicate anything we've collected so far anyway.)
693 : */
694 13585 : record_object_address_dependencies(&myself, addrs, DEPENDENCY_NORMAL);
695 :
696 13585 : free_object_addresses(addrs);
697 :
698 : /* dependency on owner */
699 13585 : if (!is_update)
700 9033 : recordDependencyOnOwner(ProcedureRelationId, retval, proowner);
701 :
702 : /* dependency on any roles mentioned in ACL */
703 13585 : if (!is_update)
704 9033 : recordDependencyOnNewAcl(ProcedureRelationId, retval, 0,
705 : proowner, proacl);
706 :
707 : /* dependency on extension */
708 13585 : recordDependencyOnCurrentExtension(&myself, is_update);
709 :
710 13584 : heap_freetuple(tup);
711 :
712 : /* Post creation hook for new function */
713 13584 : InvokeObjectPostCreateHook(ProcedureRelationId, retval, 0);
714 :
715 13584 : table_close(rel, RowExclusiveLock);
716 :
717 : /* Verify function body */
718 13584 : if (OidIsValid(languageValidator))
719 : {
720 13224 : ArrayType *set_items = NULL;
721 13224 : int save_nestlevel = 0;
722 :
723 : /* Advance command counter so new tuple can be seen by validator */
724 13224 : CommandCounterIncrement();
725 :
726 : /*
727 : * Set per-function configuration parameters so that the validation is
728 : * done with the environment the function expects. However, if
729 : * check_function_bodies is off, we don't do this, because that would
730 : * create dump ordering hazards that pg_dump doesn't know how to deal
731 : * with. (For example, a SET clause might refer to a not-yet-created
732 : * text search configuration.) This means that the validator
733 : * shouldn't complain about anything that might depend on a GUC
734 : * parameter when check_function_bodies is off.
735 : */
736 13224 : if (check_function_bodies)
737 : {
738 9154 : set_items = (ArrayType *) DatumGetPointer(proconfig);
739 9154 : if (set_items) /* Need a new GUC nesting level */
740 : {
741 42 : save_nestlevel = NewGUCNestLevel();
742 42 : ProcessGUCArray(set_items,
743 42 : (superuser() ? PGC_SUSET : PGC_USERSET),
744 : PGC_S_SESSION,
745 : GUC_ACTION_SAVE);
746 : }
747 : }
748 :
749 13218 : OidFunctionCall1(languageValidator, ObjectIdGetDatum(retval));
750 :
751 13126 : if (set_items)
752 36 : AtEOXact_GUC(true, save_nestlevel);
753 : }
754 :
755 : /* ensure that stats are dropped if transaction aborts */
756 13486 : if (!is_update)
757 8935 : pgstat_create_function(retval);
758 :
759 13486 : return myself;
760 : }
761 :
762 :
763 :
764 : /*
765 : * Validator for internal functions
766 : *
767 : * Check that the given internal function name (the "prosrc" value) is
768 : * a known builtin function.
769 : */
770 : Datum
771 2601 : fmgr_internal_validator(PG_FUNCTION_ARGS)
772 : {
773 2601 : Oid funcoid = PG_GETARG_OID(0);
774 : HeapTuple tuple;
775 : Datum tmp;
776 : char *prosrc;
777 :
778 2601 : if (!CheckFunctionValidatorAccess(fcinfo->flinfo->fn_oid, funcoid))
779 0 : PG_RETURN_VOID();
780 :
781 : /*
782 : * We do not honor check_function_bodies since it's unlikely the function
783 : * name will be found later if it isn't there now.
784 : */
785 :
786 2601 : tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcoid));
787 2601 : if (!HeapTupleIsValid(tuple))
788 0 : elog(ERROR, "cache lookup failed for function %u", funcoid);
789 :
790 2601 : tmp = SysCacheGetAttrNotNull(PROCOID, tuple, Anum_pg_proc_prosrc);
791 2601 : prosrc = TextDatumGetCString(tmp);
792 :
793 2601 : if (fmgr_internal_function(prosrc) == InvalidOid)
794 3 : ereport(ERROR,
795 : (errcode(ERRCODE_UNDEFINED_FUNCTION),
796 : errmsg("there is no built-in function named \"%s\"",
797 : prosrc)));
798 :
799 2598 : ReleaseSysCache(tuple);
800 :
801 2598 : PG_RETURN_VOID();
802 : }
803 :
804 :
805 :
806 : /*
807 : * Validator for C language functions
808 : *
809 : * Make sure that the library file exists, is loadable, and contains
810 : * the specified link symbol. Also check for a valid function
811 : * information record.
812 : */
813 : Datum
814 3572 : fmgr_c_validator(PG_FUNCTION_ARGS)
815 : {
816 3572 : Oid funcoid = PG_GETARG_OID(0);
817 : void *libraryhandle;
818 : HeapTuple tuple;
819 : Datum tmp;
820 : char *prosrc;
821 : char *probin;
822 :
823 3572 : if (!CheckFunctionValidatorAccess(fcinfo->flinfo->fn_oid, funcoid))
824 0 : PG_RETURN_VOID();
825 :
826 : /*
827 : * It'd be most consistent to skip the check if !check_function_bodies,
828 : * but the purpose of that switch is to be helpful for pg_dump loading,
829 : * and for pg_dump loading it's much better if we *do* check.
830 : */
831 :
832 3572 : tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcoid));
833 3572 : if (!HeapTupleIsValid(tuple))
834 0 : elog(ERROR, "cache lookup failed for function %u", funcoid);
835 :
836 3572 : tmp = SysCacheGetAttrNotNull(PROCOID, tuple, Anum_pg_proc_prosrc);
837 3572 : prosrc = TextDatumGetCString(tmp);
838 :
839 3572 : tmp = SysCacheGetAttrNotNull(PROCOID, tuple, Anum_pg_proc_probin);
840 3572 : probin = TextDatumGetCString(tmp);
841 :
842 3572 : (void) load_external_function(probin, prosrc, true, &libraryhandle);
843 3566 : (void) fetch_finfo_record(libraryhandle, prosrc);
844 :
845 3566 : ReleaseSysCache(tuple);
846 :
847 3566 : PG_RETURN_VOID();
848 : }
849 :
850 :
851 : /*
852 : * Validator for SQL language functions
853 : *
854 : * Parse it here in order to be sure that it contains no syntax errors.
855 : */
856 : Datum
857 4285 : fmgr_sql_validator(PG_FUNCTION_ARGS)
858 : {
859 4285 : Oid funcoid = PG_GETARG_OID(0);
860 : HeapTuple tuple;
861 : Form_pg_proc proc;
862 : List *raw_parsetree_list;
863 : List *querytree_list;
864 : ListCell *lc;
865 : bool isnull;
866 : Datum tmp;
867 : char *prosrc;
868 : parse_error_callback_arg callback_arg;
869 : ErrorContextCallback sqlerrcontext;
870 : bool haspolyarg;
871 : int i;
872 :
873 4285 : if (!CheckFunctionValidatorAccess(fcinfo->flinfo->fn_oid, funcoid))
874 0 : PG_RETURN_VOID();
875 :
876 4285 : tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcoid));
877 4285 : if (!HeapTupleIsValid(tuple))
878 0 : elog(ERROR, "cache lookup failed for function %u", funcoid);
879 4285 : proc = (Form_pg_proc) GETSTRUCT(tuple);
880 :
881 : /* Disallow pseudotype result */
882 : /* except for RECORD, VOID, or polymorphic */
883 4285 : if (get_typtype(proc->prorettype) == TYPTYPE_PSEUDO &&
884 756 : proc->prorettype != RECORDOID &&
885 413 : proc->prorettype != VOIDOID &&
886 185 : !IsPolymorphicType(proc->prorettype))
887 3 : ereport(ERROR,
888 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
889 : errmsg("SQL functions cannot return type %s",
890 : format_type_be(proc->prorettype))));
891 :
892 : /* Disallow pseudotypes in arguments */
893 : /* except for polymorphic */
894 4282 : haspolyarg = false;
895 11875 : for (i = 0; i < proc->pronargs; i++)
896 : {
897 7593 : if (get_typtype(proc->proargtypes.values[i]) == TYPTYPE_PSEUDO)
898 : {
899 491 : if (IsPolymorphicType(proc->proargtypes.values[i]))
900 491 : haspolyarg = true;
901 : else
902 0 : ereport(ERROR,
903 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
904 : errmsg("SQL functions cannot have arguments of type %s",
905 : format_type_be(proc->proargtypes.values[i]))));
906 : }
907 : }
908 :
909 : /* Postpone body checks if !check_function_bodies */
910 4282 : if (check_function_bodies)
911 : {
912 4027 : tmp = SysCacheGetAttrNotNull(PROCOID, tuple, Anum_pg_proc_prosrc);
913 4027 : prosrc = TextDatumGetCString(tmp);
914 :
915 : /*
916 : * Setup error traceback support for ereport().
917 : */
918 4027 : callback_arg.proname = NameStr(proc->proname);
919 4027 : callback_arg.prosrc = prosrc;
920 :
921 4027 : sqlerrcontext.callback = sql_function_parse_error_callback;
922 4027 : sqlerrcontext.arg = &callback_arg;
923 4027 : sqlerrcontext.previous = error_context_stack;
924 4027 : error_context_stack = &sqlerrcontext;
925 :
926 : /* If we have prosqlbody, pay attention to that not prosrc */
927 4027 : tmp = SysCacheGetAttr(PROCOID, tuple, Anum_pg_proc_prosqlbody, &isnull);
928 4027 : if (!isnull)
929 : {
930 : Node *n;
931 : List *stored_query_list;
932 :
933 2829 : n = stringToNode(TextDatumGetCString(tmp));
934 2829 : if (IsA(n, List))
935 392 : stored_query_list = linitial(castNode(List, n));
936 : else
937 2437 : stored_query_list = list_make1(n);
938 :
939 2829 : querytree_list = NIL;
940 5658 : foreach(lc, stored_query_list)
941 : {
942 2829 : Query *parsetree = lfirst_node(Query, lc);
943 : List *querytree_sublist;
944 :
945 : /*
946 : * Typically, we'd have acquired locks already while parsing
947 : * the body of the CREATE FUNCTION command. However, a
948 : * validator function cannot assume that it's only called in
949 : * that context.
950 : */
951 2829 : AcquireRewriteLocks(parsetree, true, false);
952 2829 : querytree_sublist = pg_rewrite_query(parsetree);
953 2829 : querytree_list = lappend(querytree_list, querytree_sublist);
954 : }
955 : }
956 : else
957 : {
958 : /*
959 : * We can't do full prechecking of the function definition if
960 : * there are any polymorphic input types, because actual datatypes
961 : * of expression results will be unresolvable. The check will be
962 : * done at runtime instead.
963 : *
964 : * We can run the text through the raw parser though; this will at
965 : * least catch silly syntactic errors.
966 : */
967 1198 : raw_parsetree_list = pg_parse_query(prosrc);
968 1194 : querytree_list = NIL;
969 :
970 1194 : if (!haspolyarg)
971 : {
972 : /*
973 : * OK to do full precheck: analyze and rewrite the queries,
974 : * then verify the result type.
975 : */
976 : SQLFunctionParseInfoPtr pinfo;
977 :
978 : /* But first, set up parameter information */
979 885 : pinfo = prepare_sql_fn_parse_info(tuple, NULL, InvalidOid);
980 :
981 1829 : foreach(lc, raw_parsetree_list)
982 : {
983 950 : RawStmt *parsetree = lfirst_node(RawStmt, lc);
984 : List *querytree_sublist;
985 :
986 950 : querytree_sublist = pg_analyze_and_rewrite_withcb(parsetree,
987 : prosrc,
988 : (ParserSetupHook) sql_fn_parser_setup,
989 : pinfo,
990 : NULL);
991 944 : querytree_list = lappend(querytree_list,
992 : querytree_sublist);
993 : }
994 : }
995 : }
996 :
997 4017 : if (!haspolyarg)
998 : {
999 : Oid rettype;
1000 : TupleDesc rettupdesc;
1001 :
1002 3708 : check_sql_fn_statements(querytree_list);
1003 :
1004 3705 : (void) get_func_result_type(funcoid, &rettype, &rettupdesc);
1005 :
1006 3705 : (void) check_sql_fn_retval(querytree_list,
1007 : rettype, rettupdesc,
1008 3705 : proc->prokind,
1009 : false);
1010 : }
1011 :
1012 4005 : error_context_stack = sqlerrcontext.previous;
1013 : }
1014 :
1015 4260 : ReleaseSysCache(tuple);
1016 :
1017 4260 : PG_RETURN_VOID();
1018 : }
1019 :
1020 : /*
1021 : * Error context callback for handling errors in SQL function definitions
1022 : */
1023 : static void
1024 22 : sql_function_parse_error_callback(void *arg)
1025 : {
1026 22 : parse_error_callback_arg *callback_arg = (parse_error_callback_arg *) arg;
1027 :
1028 : /* See if it's a syntax error; if so, transpose to CREATE FUNCTION */
1029 22 : if (!function_parse_error_transpose(callback_arg->prosrc))
1030 : {
1031 : /* If it's not a syntax error, push info onto context stack */
1032 12 : errcontext("SQL function \"%s\"", callback_arg->proname);
1033 : }
1034 22 : }
1035 :
1036 : /*
1037 : * Adjust a syntax error occurring inside the function body of a CREATE
1038 : * FUNCTION or DO command. This can be used by any function validator or
1039 : * anonymous-block handler, not only for SQL-language functions.
1040 : * It is assumed that the syntax error position is initially relative to the
1041 : * function body string (as passed in). If possible, we adjust the position
1042 : * to reference the original command text; if we can't manage that, we set
1043 : * up an "internal query" syntax error instead.
1044 : *
1045 : * Returns true if a syntax error was processed, false if not.
1046 : */
1047 : bool
1048 128 : function_parse_error_transpose(const char *prosrc)
1049 : {
1050 : int origerrposition;
1051 : int newerrposition;
1052 :
1053 : /*
1054 : * Nothing to do unless we are dealing with a syntax error that has a
1055 : * cursor position.
1056 : *
1057 : * Some PLs may prefer to report the error position as an internal error
1058 : * to begin with, so check that too.
1059 : */
1060 128 : origerrposition = geterrposition();
1061 128 : if (origerrposition <= 0)
1062 : {
1063 118 : origerrposition = getinternalerrposition();
1064 118 : if (origerrposition <= 0)
1065 35 : return false;
1066 : }
1067 :
1068 : /* We can get the original query text from the active portal (hack...) */
1069 93 : if (ActivePortal && ActivePortal->status == PORTAL_ACTIVE)
1070 93 : {
1071 93 : const char *queryText = ActivePortal->sourceText;
1072 :
1073 : /* Try to locate the prosrc in the original text */
1074 93 : newerrposition = match_prosrc_to_query(prosrc, queryText,
1075 : origerrposition);
1076 : }
1077 : else
1078 : {
1079 : /*
1080 : * Quietly give up if no ActivePortal. This is an unusual situation
1081 : * but it can happen in, e.g., logical replication workers.
1082 : */
1083 0 : newerrposition = -1;
1084 : }
1085 :
1086 93 : if (newerrposition > 0)
1087 : {
1088 : /* Successful, so fix error position to reference original query */
1089 92 : errposition(newerrposition);
1090 : /* Get rid of any report of the error as an "internal query" */
1091 92 : internalerrposition(0);
1092 92 : internalerrquery(NULL);
1093 : }
1094 : else
1095 : {
1096 : /*
1097 : * If unsuccessful, convert the position to an internal position
1098 : * marker and give the function text as the internal query.
1099 : */
1100 1 : errposition(0);
1101 1 : internalerrposition(origerrposition);
1102 1 : internalerrquery(prosrc);
1103 : }
1104 :
1105 93 : return true;
1106 : }
1107 :
1108 : /*
1109 : * Try to locate the string literal containing the function body in the
1110 : * given text of the CREATE FUNCTION or DO command. If successful, return
1111 : * the character (not byte) index within the command corresponding to the
1112 : * given character index within the literal. If not successful, return 0.
1113 : */
1114 : static int
1115 93 : match_prosrc_to_query(const char *prosrc, const char *queryText,
1116 : int cursorpos)
1117 : {
1118 : /*
1119 : * Rather than fully parsing the original command, we just scan the
1120 : * command looking for $prosrc$ or 'prosrc'. This could be fooled (though
1121 : * not in any very probable scenarios), so fail if we find more than one
1122 : * match.
1123 : */
1124 93 : int prosrclen = strlen(prosrc);
1125 93 : int querylen = strlen(queryText);
1126 93 : int matchpos = 0;
1127 : int curpos;
1128 : int newcursorpos;
1129 :
1130 6328 : for (curpos = 0; curpos < querylen - prosrclen; curpos++)
1131 : {
1132 6235 : if (queryText[curpos] == '$' &&
1133 172 : strncmp(prosrc, &queryText[curpos + 1], prosrclen) == 0 &&
1134 86 : queryText[curpos + 1 + prosrclen] == '$')
1135 : {
1136 : /*
1137 : * Found a $foo$ match. Since there are no embedded quoting
1138 : * characters in a dollar-quoted literal, we don't have to do any
1139 : * fancy arithmetic; just offset by the starting position.
1140 : */
1141 86 : if (matchpos)
1142 0 : return 0; /* multiple matches, fail */
1143 86 : matchpos = pg_mbstrlen_with_len(queryText, curpos + 1)
1144 : + cursorpos;
1145 : }
1146 6155 : else if (queryText[curpos] == '\'' &&
1147 6 : match_prosrc_to_literal(prosrc, &queryText[curpos + 1],
1148 : cursorpos, &newcursorpos))
1149 : {
1150 : /*
1151 : * Found a 'foo' match. match_prosrc_to_literal() has adjusted
1152 : * for any quotes or backslashes embedded in the literal.
1153 : */
1154 6 : if (matchpos)
1155 0 : return 0; /* multiple matches, fail */
1156 6 : matchpos = pg_mbstrlen_with_len(queryText, curpos + 1)
1157 6 : + newcursorpos;
1158 : }
1159 : }
1160 :
1161 93 : return matchpos;
1162 : }
1163 :
1164 : /*
1165 : * Try to match the given source text to a single-quoted literal.
1166 : * If successful, adjust newcursorpos to correspond to the character
1167 : * (not byte) index corresponding to cursorpos in the source text.
1168 : *
1169 : * At entry, literal points just past a ' character. We must check for the
1170 : * trailing quote.
1171 : */
1172 : static bool
1173 6 : match_prosrc_to_literal(const char *prosrc, const char *literal,
1174 : int cursorpos, int *newcursorpos)
1175 : {
1176 6 : int newcp = cursorpos;
1177 : int chlen;
1178 :
1179 : /*
1180 : * This implementation handles backslashes and doubled quotes in the
1181 : * string literal. It does not handle the SQL syntax for literals
1182 : * continued across line boundaries.
1183 : *
1184 : * We do the comparison a character at a time, not a byte at a time, so
1185 : * that we can do the correct cursorpos math.
1186 : */
1187 72 : while (*prosrc)
1188 : {
1189 66 : cursorpos--; /* characters left before cursor */
1190 :
1191 : /*
1192 : * Check for backslashes and doubled quotes in the literal; adjust
1193 : * newcp when one is found before the cursor.
1194 : */
1195 66 : if (*literal == '\\')
1196 : {
1197 0 : literal++;
1198 0 : if (cursorpos > 0)
1199 0 : newcp++;
1200 : }
1201 66 : else if (*literal == '\'')
1202 : {
1203 0 : if (literal[1] != '\'')
1204 0 : goto fail;
1205 0 : literal++;
1206 0 : if (cursorpos > 0)
1207 0 : newcp++;
1208 : }
1209 66 : chlen = pg_mblen_cstr(prosrc);
1210 66 : if (strncmp(prosrc, literal, chlen) != 0)
1211 0 : goto fail;
1212 66 : prosrc += chlen;
1213 66 : literal += chlen;
1214 : }
1215 :
1216 6 : if (*literal == '\'' && literal[1] != '\'')
1217 : {
1218 : /* success */
1219 6 : *newcursorpos = newcp;
1220 6 : return true;
1221 : }
1222 :
1223 0 : fail:
1224 : /* Must set *newcursorpos to suppress compiler warning */
1225 0 : *newcursorpos = newcp;
1226 0 : return false;
1227 : }
1228 :
1229 : List *
1230 60 : oid_array_to_list(Datum datum)
1231 : {
1232 60 : ArrayType *array = DatumGetArrayTypeP(datum);
1233 : Datum *values;
1234 : int nelems;
1235 : int i;
1236 60 : List *result = NIL;
1237 :
1238 60 : deconstruct_array_builtin(array, OIDOID, &values, NULL, &nelems);
1239 122 : for (i = 0; i < nelems; i++)
1240 62 : result = lappend_oid(result, DatumGetObjectId(values[i]));
1241 60 : return result;
1242 : }
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