Line data Source code
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) 1996-2023, 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 67326 : 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 67326 : typtup = LookupTypeName(NULL, returnType, NULL, false);
101 :
102 67326 : if (typtup)
103 : {
104 67252 : if (!((Form_pg_type) GETSTRUCT(typtup))->typisdefined)
105 : {
106 154 : if (languageOid == SQLlanguageId)
107 0 : ereport(ERROR,
108 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
109 : errmsg("SQL function cannot return shell type %s",
110 : TypeNameToString(returnType))));
111 : else
112 154 : ereport(NOTICE,
113 : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
114 : errmsg("return type %s is only a shell",
115 : TypeNameToString(returnType))));
116 : }
117 67252 : rettype = typeTypeId(typtup);
118 67252 : ReleaseSysCache(typtup);
119 : }
120 : else
121 : {
122 74 : char *typnam = TypeNameToString(returnType);
123 : Oid namespaceId;
124 : char *typname;
125 : ObjectAddress address;
126 :
127 : /*
128 : * Only C-coded functions can be I/O functions. We enforce this
129 : * restriction here mainly to prevent littering the catalogs with
130 : * shell types due to simple typos in user-defined function
131 : * definitions.
132 : */
133 74 : if (languageOid != INTERNALlanguageId &&
134 : languageOid != ClanguageId)
135 0 : ereport(ERROR,
136 : (errcode(ERRCODE_UNDEFINED_OBJECT),
137 : errmsg("type \"%s\" does not exist", typnam)));
138 :
139 : /* Reject if there's typmod decoration, too */
140 74 : if (returnType->typmods != NIL)
141 0 : ereport(ERROR,
142 : (errcode(ERRCODE_SYNTAX_ERROR),
143 : errmsg("type modifier cannot be specified for shell type \"%s\"",
144 : typnam)));
145 :
146 : /* Otherwise, go ahead and make a shell type */
147 74 : ereport(NOTICE,
148 : (errcode(ERRCODE_UNDEFINED_OBJECT),
149 : errmsg("type \"%s\" is not yet defined", typnam),
150 : errdetail("Creating a shell type definition.")));
151 74 : namespaceId = QualifiedNameGetCreationNamespace(returnType->names,
152 : &typname);
153 74 : aclresult = object_aclcheck(NamespaceRelationId, namespaceId, GetUserId(),
154 : ACL_CREATE);
155 74 : if (aclresult != ACLCHECK_OK)
156 0 : aclcheck_error(aclresult, OBJECT_SCHEMA,
157 0 : get_namespace_name(namespaceId));
158 74 : address = TypeShellMake(typname, namespaceId, GetUserId());
159 74 : rettype = address.objectId;
160 : Assert(OidIsValid(rettype));
161 : }
162 :
163 67326 : aclresult = object_aclcheck(TypeRelationId, rettype, GetUserId(), ACL_USAGE);
164 67326 : if (aclresult != ACLCHECK_OK)
165 6 : aclcheck_error_type(aclresult, rettype);
166 :
167 67320 : *prorettype_p = rettype;
168 67320 : *returnsSet_p = returnType->setof;
169 67320 : }
170 :
171 : /*
172 : * Interpret the function parameter list of a CREATE FUNCTION,
173 : * CREATE PROCEDURE, or CREATE AGGREGATE statement.
174 : *
175 : * Input parameters:
176 : * parameters: list of FunctionParameter structs
177 : * languageOid: OID of function language (InvalidOid if it's CREATE AGGREGATE)
178 : * objtype: identifies type of object being created
179 : *
180 : * Results are stored into output parameters. parameterTypes must always
181 : * be created, but the other arrays/lists can be NULL pointers if not needed.
182 : * variadicArgType is set to the variadic array type if there's a VARIADIC
183 : * parameter (there can be only one); or to InvalidOid if not.
184 : * requiredResultType is set to InvalidOid if there are no OUT parameters,
185 : * else it is set to the OID of the implied result type.
186 : */
187 : void
188 68652 : interpret_function_parameter_list(ParseState *pstate,
189 : List *parameters,
190 : Oid languageOid,
191 : ObjectType objtype,
192 : oidvector **parameterTypes,
193 : List **parameterTypes_list,
194 : ArrayType **allParameterTypes,
195 : ArrayType **parameterModes,
196 : ArrayType **parameterNames,
197 : List **inParameterNames_list,
198 : List **parameterDefaults,
199 : Oid *variadicArgType,
200 : Oid *requiredResultType)
201 : {
202 68652 : int parameterCount = list_length(parameters);
203 : Oid *inTypes;
204 68652 : int inCount = 0;
205 : Datum *allTypes;
206 : Datum *paramModes;
207 : Datum *paramNames;
208 68652 : int outCount = 0;
209 68652 : int varCount = 0;
210 68652 : bool have_names = false;
211 68652 : bool have_defaults = false;
212 : ListCell *x;
213 : int i;
214 :
215 68652 : *variadicArgType = InvalidOid; /* default result */
216 68652 : *requiredResultType = InvalidOid; /* default result */
217 :
218 68652 : inTypes = (Oid *) palloc(parameterCount * sizeof(Oid));
219 68652 : allTypes = (Datum *) palloc(parameterCount * sizeof(Datum));
220 68652 : paramModes = (Datum *) palloc(parameterCount * sizeof(Datum));
221 68652 : paramNames = (Datum *) palloc0(parameterCount * sizeof(Datum));
222 68652 : *parameterDefaults = NIL;
223 :
224 : /* Scan the list and extract data into work arrays */
225 68652 : i = 0;
226 247854 : foreach(x, parameters)
227 : {
228 179262 : FunctionParameter *fp = (FunctionParameter *) lfirst(x);
229 179262 : TypeName *t = fp->argType;
230 179262 : FunctionParameterMode fpmode = fp->mode;
231 179262 : bool isinput = false;
232 : Oid toid;
233 : Type typtup;
234 : AclResult aclresult;
235 :
236 : /* For our purposes here, a defaulted mode spec is identical to IN */
237 179262 : if (fpmode == FUNC_PARAM_DEFAULT)
238 137396 : fpmode = FUNC_PARAM_IN;
239 :
240 179262 : typtup = LookupTypeName(NULL, t, NULL, false);
241 179262 : if (typtup)
242 : {
243 179262 : if (!((Form_pg_type) GETSTRUCT(typtup))->typisdefined)
244 : {
245 : /* As above, hard error if language is SQL */
246 222 : if (languageOid == SQLlanguageId)
247 0 : ereport(ERROR,
248 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
249 : errmsg("SQL function cannot accept shell type %s",
250 : TypeNameToString(t))));
251 : /* We don't allow creating aggregates on shell types either */
252 222 : else if (objtype == OBJECT_AGGREGATE)
253 0 : ereport(ERROR,
254 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
255 : errmsg("aggregate cannot accept shell type %s",
256 : TypeNameToString(t))));
257 : else
258 222 : ereport(NOTICE,
259 : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
260 : errmsg("argument type %s is only a shell",
261 : TypeNameToString(t))));
262 : }
263 179262 : toid = typeTypeId(typtup);
264 179262 : ReleaseSysCache(typtup);
265 : }
266 : else
267 : {
268 0 : ereport(ERROR,
269 : (errcode(ERRCODE_UNDEFINED_OBJECT),
270 : errmsg("type %s does not exist",
271 : TypeNameToString(t))));
272 : toid = InvalidOid; /* keep compiler quiet */
273 : }
274 :
275 179262 : aclresult = object_aclcheck(TypeRelationId, toid, GetUserId(), ACL_USAGE);
276 179262 : if (aclresult != ACLCHECK_OK)
277 12 : aclcheck_error_type(aclresult, toid);
278 :
279 179250 : if (t->setof)
280 : {
281 0 : if (objtype == OBJECT_AGGREGATE)
282 0 : ereport(ERROR,
283 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
284 : errmsg("aggregates cannot accept set arguments")));
285 0 : else if (objtype == OBJECT_PROCEDURE)
286 0 : ereport(ERROR,
287 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
288 : errmsg("procedures cannot accept set arguments")));
289 : else
290 0 : ereport(ERROR,
291 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
292 : errmsg("functions cannot accept set arguments")));
293 : }
294 :
295 : /* handle input parameters */
296 179250 : if (fpmode != FUNC_PARAM_OUT && fpmode != FUNC_PARAM_TABLE)
297 : {
298 : /* other input parameters can't follow a VARIADIC parameter */
299 153116 : if (varCount > 0)
300 0 : ereport(ERROR,
301 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
302 : errmsg("VARIADIC parameter must be the last input parameter")));
303 153116 : inTypes[inCount++] = toid;
304 153116 : isinput = true;
305 153116 : if (parameterTypes_list)
306 152590 : *parameterTypes_list = lappend_oid(*parameterTypes_list, toid);
307 : }
308 :
309 : /* handle output parameters */
310 179250 : if (fpmode != FUNC_PARAM_IN && fpmode != FUNC_PARAM_VARIADIC)
311 : {
312 26282 : if (objtype == OBJECT_PROCEDURE)
313 : {
314 : /*
315 : * We disallow OUT-after-VARIADIC only for procedures. While
316 : * such a case causes no confusion in ordinary function calls,
317 : * it would cause confusion in a CALL statement.
318 : */
319 126 : if (varCount > 0)
320 6 : ereport(ERROR,
321 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
322 : errmsg("VARIADIC parameter must be the last parameter")));
323 : /* Procedures with output parameters always return RECORD */
324 120 : *requiredResultType = RECORDOID;
325 : }
326 26156 : else if (outCount == 0) /* save first output param's type */
327 7228 : *requiredResultType = toid;
328 26276 : outCount++;
329 : }
330 :
331 179244 : if (fpmode == FUNC_PARAM_VARIADIC)
332 : {
333 2524 : *variadicArgType = toid;
334 2524 : varCount++;
335 : /* validate variadic parameter type */
336 2524 : switch (toid)
337 : {
338 70 : case ANYARRAYOID:
339 : case ANYCOMPATIBLEARRAYOID:
340 : case ANYOID:
341 : /* okay */
342 70 : break;
343 2454 : default:
344 2454 : if (!OidIsValid(get_element_type(toid)))
345 0 : ereport(ERROR,
346 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
347 : errmsg("VARIADIC parameter must be an array")));
348 2454 : break;
349 : }
350 176720 : }
351 :
352 179244 : allTypes[i] = ObjectIdGetDatum(toid);
353 :
354 179244 : paramModes[i] = CharGetDatum(fpmode);
355 :
356 179244 : if (fp->name && fp->name[0])
357 : {
358 : ListCell *px;
359 :
360 : /*
361 : * As of Postgres 9.0 we disallow using the same name for two
362 : * input or two output function parameters. Depending on the
363 : * function's language, conflicting input and output names might
364 : * be bad too, but we leave it to the PL to complain if so.
365 : */
366 322564 : foreach(px, parameters)
367 : {
368 322564 : FunctionParameter *prevfp = (FunctionParameter *) lfirst(px);
369 : FunctionParameterMode prevfpmode;
370 :
371 322564 : if (prevfp == fp)
372 101294 : break;
373 : /* as above, default mode is IN */
374 221270 : prevfpmode = prevfp->mode;
375 221270 : if (prevfpmode == FUNC_PARAM_DEFAULT)
376 90742 : prevfpmode = FUNC_PARAM_IN;
377 : /* pure in doesn't conflict with pure out */
378 221270 : if ((fpmode == FUNC_PARAM_IN ||
379 96580 : fpmode == FUNC_PARAM_VARIADIC) &&
380 96522 : (prevfpmode == FUNC_PARAM_OUT ||
381 : prevfpmode == FUNC_PARAM_TABLE))
382 58 : continue;
383 221212 : if ((prevfpmode == FUNC_PARAM_IN ||
384 156794 : prevfpmode == FUNC_PARAM_VARIADIC) &&
385 96998 : (fpmode == FUNC_PARAM_OUT ||
386 : fpmode == FUNC_PARAM_TABLE))
387 60230 : continue;
388 160982 : if (prevfp->name && prevfp->name[0] &&
389 160960 : strcmp(prevfp->name, fp->name) == 0)
390 24 : ereport(ERROR,
391 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
392 : errmsg("parameter name \"%s\" used more than once",
393 : fp->name)));
394 : }
395 :
396 101294 : paramNames[i] = CStringGetTextDatum(fp->name);
397 101294 : have_names = true;
398 : }
399 :
400 179220 : if (inParameterNames_list)
401 178694 : *inParameterNames_list = lappend(*inParameterNames_list, makeString(fp->name ? fp->name : pstrdup("")));
402 :
403 179220 : if (fp->defexpr)
404 : {
405 : Node *def;
406 :
407 31232 : if (!isinput)
408 6 : ereport(ERROR,
409 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
410 : errmsg("only input parameters can have default values")));
411 :
412 31226 : def = transformExpr(pstate, fp->defexpr,
413 : EXPR_KIND_FUNCTION_DEFAULT);
414 31226 : def = coerce_to_specific_type(pstate, def, toid, "DEFAULT");
415 31226 : assign_expr_collations(pstate, def);
416 :
417 : /*
418 : * Make sure no variables are referred to (this is probably dead
419 : * code now that add_missing_from is history).
420 : */
421 62452 : if (pstate->p_rtable != NIL ||
422 31226 : contain_var_clause(def))
423 0 : ereport(ERROR,
424 : (errcode(ERRCODE_INVALID_COLUMN_REFERENCE),
425 : errmsg("cannot use table references in parameter default value")));
426 :
427 : /*
428 : * transformExpr() should have already rejected subqueries,
429 : * aggregates, and window functions, based on the EXPR_KIND_ for a
430 : * default expression.
431 : *
432 : * It can't return a set either --- but coerce_to_specific_type
433 : * already checked that for us.
434 : *
435 : * Note: the point of these restrictions is to ensure that an
436 : * expression that, on its face, hasn't got subplans, aggregates,
437 : * etc cannot suddenly have them after function default arguments
438 : * are inserted.
439 : */
440 :
441 31226 : *parameterDefaults = lappend(*parameterDefaults, def);
442 31226 : have_defaults = true;
443 : }
444 : else
445 : {
446 147988 : if (isinput && have_defaults)
447 6 : ereport(ERROR,
448 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
449 : errmsg("input parameters after one with a default value must also have defaults")));
450 :
451 : /*
452 : * For procedures, we also can't allow OUT parameters after one
453 : * with a default, because the same sort of confusion arises in a
454 : * CALL statement.
455 : */
456 147982 : if (objtype == OBJECT_PROCEDURE && have_defaults)
457 6 : ereport(ERROR,
458 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
459 : errmsg("procedure OUT parameters cannot appear after one with a default value")));
460 : }
461 :
462 179202 : i++;
463 : }
464 :
465 : /* Now construct the proper outputs as needed */
466 68592 : *parameterTypes = buildoidvector(inTypes, inCount);
467 :
468 68592 : if (outCount > 0 || varCount > 0)
469 : {
470 7384 : *allParameterTypes = construct_array_builtin(allTypes, parameterCount, OIDOID);
471 7384 : *parameterModes = construct_array_builtin(paramModes, parameterCount, CHAROID);
472 7384 : if (outCount > 1)
473 7062 : *requiredResultType = RECORDOID;
474 : /* otherwise we set requiredResultType correctly above */
475 : }
476 : else
477 : {
478 61208 : *allParameterTypes = NULL;
479 61208 : *parameterModes = NULL;
480 : }
481 :
482 68592 : if (have_names)
483 : {
484 127872 : for (i = 0; i < parameterCount; i++)
485 : {
486 101968 : if (paramNames[i] == PointerGetDatum(NULL))
487 728 : paramNames[i] = CStringGetTextDatum("");
488 : }
489 25904 : *parameterNames = construct_array_builtin(paramNames, parameterCount, TEXTOID);
490 : }
491 : else
492 42688 : *parameterNames = NULL;
493 68592 : }
494 :
495 :
496 : /*
497 : * Recognize one of the options that can be passed to both CREATE
498 : * FUNCTION and ALTER FUNCTION and return it via one of the out
499 : * parameters. Returns true if the passed option was recognized. If
500 : * the out parameter we were going to assign to points to non-NULL,
501 : * raise a duplicate-clause error. (We don't try to detect duplicate
502 : * SET parameters though --- if you're redundant, the last one wins.)
503 : */
504 : static bool
505 188148 : compute_common_attribute(ParseState *pstate,
506 : bool is_procedure,
507 : DefElem *defel,
508 : DefElem **volatility_item,
509 : DefElem **strict_item,
510 : DefElem **security_item,
511 : DefElem **leakproof_item,
512 : List **set_items,
513 : DefElem **cost_item,
514 : DefElem **rows_item,
515 : DefElem **support_item,
516 : DefElem **parallel_item)
517 : {
518 188148 : if (strcmp(defel->defname, "volatility") == 0)
519 : {
520 54898 : if (is_procedure)
521 0 : goto procedure_error;
522 54898 : if (*volatility_item)
523 0 : errorConflictingDefElem(defel, pstate);
524 :
525 54898 : *volatility_item = defel;
526 : }
527 133250 : else if (strcmp(defel->defname, "strict") == 0)
528 : {
529 50560 : if (is_procedure)
530 12 : goto procedure_error;
531 50548 : if (*strict_item)
532 0 : errorConflictingDefElem(defel, pstate);
533 :
534 50548 : *strict_item = defel;
535 : }
536 82690 : else if (strcmp(defel->defname, "security") == 0)
537 : {
538 50 : if (*security_item)
539 0 : errorConflictingDefElem(defel, pstate);
540 :
541 50 : *security_item = defel;
542 : }
543 82640 : else if (strcmp(defel->defname, "leakproof") == 0)
544 : {
545 58 : if (is_procedure)
546 0 : goto procedure_error;
547 58 : if (*leakproof_item)
548 0 : errorConflictingDefElem(defel, pstate);
549 :
550 58 : *leakproof_item = defel;
551 : }
552 82582 : else if (strcmp(defel->defname, "set") == 0)
553 : {
554 106 : *set_items = lappend(*set_items, defel->arg);
555 : }
556 82476 : else if (strcmp(defel->defname, "cost") == 0)
557 : {
558 27128 : if (is_procedure)
559 0 : goto procedure_error;
560 27128 : if (*cost_item)
561 0 : errorConflictingDefElem(defel, pstate);
562 :
563 27128 : *cost_item = defel;
564 : }
565 55348 : else if (strcmp(defel->defname, "rows") == 0)
566 : {
567 3018 : if (is_procedure)
568 0 : goto procedure_error;
569 3018 : if (*rows_item)
570 0 : errorConflictingDefElem(defel, pstate);
571 :
572 3018 : *rows_item = defel;
573 : }
574 52330 : else if (strcmp(defel->defname, "support") == 0)
575 : {
576 18 : if (is_procedure)
577 0 : goto procedure_error;
578 18 : if (*support_item)
579 0 : errorConflictingDefElem(defel, pstate);
580 :
581 18 : *support_item = defel;
582 : }
583 52312 : else if (strcmp(defel->defname, "parallel") == 0)
584 : {
585 52312 : if (is_procedure)
586 0 : goto procedure_error;
587 52312 : if (*parallel_item)
588 0 : errorConflictingDefElem(defel, pstate);
589 :
590 52312 : *parallel_item = defel;
591 : }
592 : else
593 0 : return false;
594 :
595 : /* Recognized an option */
596 188136 : return true;
597 :
598 12 : procedure_error:
599 12 : ereport(ERROR,
600 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
601 : errmsg("invalid attribute in procedure definition"),
602 : parser_errposition(pstate, defel->location)));
603 : return false;
604 : }
605 :
606 : static char
607 54898 : interpret_func_volatility(DefElem *defel)
608 : {
609 54898 : char *str = strVal(defel->arg);
610 :
611 54898 : if (strcmp(str, "immutable") == 0)
612 35206 : return PROVOLATILE_IMMUTABLE;
613 19692 : else if (strcmp(str, "stable") == 0)
614 12906 : return PROVOLATILE_STABLE;
615 6786 : else if (strcmp(str, "volatile") == 0)
616 6786 : return PROVOLATILE_VOLATILE;
617 : else
618 : {
619 0 : elog(ERROR, "invalid volatility \"%s\"", str);
620 : return 0; /* keep compiler quiet */
621 : }
622 : }
623 :
624 : static char
625 52312 : interpret_func_parallel(DefElem *defel)
626 : {
627 52312 : char *str = strVal(defel->arg);
628 :
629 52312 : if (strcmp(str, "safe") == 0)
630 50036 : return PROPARALLEL_SAFE;
631 2276 : else if (strcmp(str, "unsafe") == 0)
632 12 : return PROPARALLEL_UNSAFE;
633 2264 : else if (strcmp(str, "restricted") == 0)
634 2264 : return PROPARALLEL_RESTRICTED;
635 : else
636 : {
637 0 : ereport(ERROR,
638 : (errcode(ERRCODE_SYNTAX_ERROR),
639 : errmsg("parameter \"parallel\" must be SAFE, RESTRICTED, or UNSAFE")));
640 : return PROPARALLEL_UNSAFE; /* keep compiler quiet */
641 : }
642 : }
643 :
644 : /*
645 : * Update a proconfig value according to a list of VariableSetStmt items.
646 : *
647 : * The input and result may be NULL to signify a null entry.
648 : */
649 : static ArrayType *
650 74 : update_proconfig_value(ArrayType *a, List *set_items)
651 : {
652 : ListCell *l;
653 :
654 180 : foreach(l, set_items)
655 : {
656 106 : VariableSetStmt *sstmt = lfirst_node(VariableSetStmt, l);
657 :
658 106 : if (sstmt->kind == VAR_RESET_ALL)
659 12 : a = NULL;
660 : else
661 : {
662 94 : char *valuestr = ExtractSetVariableArgs(sstmt);
663 :
664 94 : if (valuestr)
665 94 : a = GUCArrayAdd(a, sstmt->name, valuestr);
666 : else /* RESET */
667 0 : a = GUCArrayDelete(a, sstmt->name);
668 : }
669 : }
670 :
671 74 : return a;
672 : }
673 :
674 : static Oid
675 18 : interpret_func_support(DefElem *defel)
676 : {
677 18 : List *procName = defGetQualifiedName(defel);
678 : Oid procOid;
679 : Oid argList[1];
680 :
681 : /*
682 : * Support functions always take one INTERNAL argument and return
683 : * INTERNAL.
684 : */
685 18 : argList[0] = INTERNALOID;
686 :
687 18 : procOid = LookupFuncName(procName, 1, argList, true);
688 18 : if (!OidIsValid(procOid))
689 0 : ereport(ERROR,
690 : (errcode(ERRCODE_UNDEFINED_FUNCTION),
691 : errmsg("function %s does not exist",
692 : func_signature_string(procName, 1, NIL, argList))));
693 :
694 18 : if (get_func_rettype(procOid) != INTERNALOID)
695 0 : ereport(ERROR,
696 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
697 : errmsg("support function %s must return type %s",
698 : NameListToString(procName), "internal")));
699 :
700 : /*
701 : * Someday we might want an ACL check here; but for now, we insist that
702 : * you be superuser to specify a support function, so privilege on the
703 : * support function is moot.
704 : */
705 18 : if (!superuser())
706 0 : ereport(ERROR,
707 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
708 : errmsg("must be superuser to specify a support function")));
709 :
710 18 : return procOid;
711 : }
712 :
713 :
714 : /*
715 : * Dissect the list of options assembled in gram.y into function
716 : * attributes.
717 : */
718 : static void
719 68142 : compute_function_attributes(ParseState *pstate,
720 : bool is_procedure,
721 : List *options,
722 : List **as,
723 : char **language,
724 : Node **transform,
725 : bool *windowfunc_p,
726 : char *volatility_p,
727 : bool *strict_p,
728 : bool *security_definer,
729 : bool *leakproof_p,
730 : ArrayType **proconfig,
731 : float4 *procost,
732 : float4 *prorows,
733 : Oid *prosupport,
734 : char *parallel_p)
735 : {
736 : ListCell *option;
737 68142 : DefElem *as_item = NULL;
738 68142 : DefElem *language_item = NULL;
739 68142 : DefElem *transform_item = NULL;
740 68142 : DefElem *windowfunc_item = NULL;
741 68142 : DefElem *volatility_item = NULL;
742 68142 : DefElem *strict_item = NULL;
743 68142 : DefElem *security_item = NULL;
744 68142 : DefElem *leakproof_item = NULL;
745 68142 : List *set_items = NIL;
746 68142 : DefElem *cost_item = NULL;
747 68142 : DefElem *rows_item = NULL;
748 68142 : DefElem *support_item = NULL;
749 68142 : DefElem *parallel_item = NULL;
750 :
751 358154 : foreach(option, options)
752 : {
753 290024 : DefElem *defel = (DefElem *) lfirst(option);
754 :
755 290024 : if (strcmp(defel->defname, "as") == 0)
756 : {
757 34266 : if (as_item)
758 0 : errorConflictingDefElem(defel, pstate);
759 34266 : as_item = defel;
760 : }
761 255758 : else if (strcmp(defel->defname, "language") == 0)
762 : {
763 68086 : if (language_item)
764 0 : errorConflictingDefElem(defel, pstate);
765 68086 : language_item = defel;
766 : }
767 187672 : else if (strcmp(defel->defname, "transform") == 0)
768 : {
769 118 : if (transform_item)
770 0 : errorConflictingDefElem(defel, pstate);
771 118 : transform_item = defel;
772 : }
773 187554 : else if (strcmp(defel->defname, "window") == 0)
774 : {
775 20 : if (windowfunc_item)
776 0 : errorConflictingDefElem(defel, pstate);
777 20 : if (is_procedure)
778 6 : ereport(ERROR,
779 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
780 : errmsg("invalid attribute in procedure definition"),
781 : parser_errposition(pstate, defel->location)));
782 14 : windowfunc_item = defel;
783 : }
784 187534 : else if (compute_common_attribute(pstate,
785 : is_procedure,
786 : defel,
787 : &volatility_item,
788 : &strict_item,
789 : &security_item,
790 : &leakproof_item,
791 : &set_items,
792 : &cost_item,
793 : &rows_item,
794 : &support_item,
795 : ¶llel_item))
796 : {
797 : /* recognized common option */
798 187528 : continue;
799 : }
800 : else
801 0 : elog(ERROR, "option \"%s\" not recognized",
802 : defel->defname);
803 : }
804 :
805 68130 : if (as_item)
806 34266 : *as = (List *) as_item->arg;
807 68130 : if (language_item)
808 68074 : *language = strVal(language_item->arg);
809 68130 : if (transform_item)
810 118 : *transform = transform_item->arg;
811 68130 : if (windowfunc_item)
812 14 : *windowfunc_p = boolVal(windowfunc_item->arg);
813 68130 : if (volatility_item)
814 54864 : *volatility_p = interpret_func_volatility(volatility_item);
815 68130 : if (strict_item)
816 50524 : *strict_p = boolVal(strict_item->arg);
817 68130 : if (security_item)
818 38 : *security_definer = boolVal(security_item->arg);
819 68130 : if (leakproof_item)
820 34 : *leakproof_p = boolVal(leakproof_item->arg);
821 68130 : if (set_items)
822 56 : *proconfig = update_proconfig_value(NULL, set_items);
823 68130 : if (cost_item)
824 : {
825 27116 : *procost = defGetNumeric(cost_item);
826 27116 : if (*procost <= 0)
827 0 : ereport(ERROR,
828 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
829 : errmsg("COST must be positive")));
830 : }
831 68130 : if (rows_item)
832 : {
833 3018 : *prorows = defGetNumeric(rows_item);
834 3018 : if (*prorows <= 0)
835 0 : ereport(ERROR,
836 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
837 : errmsg("ROWS must be positive")));
838 : }
839 68130 : if (support_item)
840 12 : *prosupport = interpret_func_support(support_item);
841 68130 : if (parallel_item)
842 51834 : *parallel_p = interpret_func_parallel(parallel_item);
843 68130 : }
844 :
845 :
846 : /*
847 : * For a dynamically linked C language object, the form of the clause is
848 : *
849 : * AS <object file name> [, <link symbol name> ]
850 : *
851 : * In all other cases
852 : *
853 : * AS <object reference, or sql code>
854 : */
855 : static void
856 68044 : interpret_AS_clause(Oid languageOid, const char *languageName,
857 : char *funcname, List *as, Node *sql_body_in,
858 : List *parameterTypes, List *inParameterNames,
859 : char **prosrc_str_p, char **probin_str_p,
860 : Node **sql_body_out,
861 : const char *queryString)
862 : {
863 68044 : if (!sql_body_in && !as)
864 0 : ereport(ERROR,
865 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
866 : errmsg("no function body specified")));
867 :
868 68044 : if (sql_body_in && as)
869 6 : ereport(ERROR,
870 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
871 : errmsg("duplicate function body specified")));
872 :
873 68038 : if (sql_body_in && languageOid != SQLlanguageId)
874 0 : ereport(ERROR,
875 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
876 : errmsg("inline SQL function body only valid for language SQL")));
877 :
878 68038 : *sql_body_out = NULL;
879 :
880 68038 : if (languageOid == ClanguageId)
881 : {
882 : /*
883 : * For "C" language, store the file name in probin and, when given,
884 : * the link symbol name in prosrc. If link symbol is omitted,
885 : * substitute procedure name. We also allow link symbol to be
886 : * specified as "-", since that was the habit in PG versions before
887 : * 8.4, and there might be dump files out there that don't translate
888 : * that back to "omitted".
889 : */
890 7006 : *probin_str_p = strVal(linitial(as));
891 7006 : if (list_length(as) == 1)
892 3812 : *prosrc_str_p = funcname;
893 : else
894 : {
895 3194 : *prosrc_str_p = strVal(lsecond(as));
896 3194 : if (strcmp(*prosrc_str_p, "-") == 0)
897 0 : *prosrc_str_p = funcname;
898 : }
899 : }
900 61032 : else if (sql_body_in)
901 : {
902 : SQLFunctionParseInfoPtr pinfo;
903 :
904 33864 : pinfo = (SQLFunctionParseInfoPtr) palloc0(sizeof(SQLFunctionParseInfo));
905 :
906 33864 : pinfo->fname = funcname;
907 33864 : pinfo->nargs = list_length(parameterTypes);
908 33864 : pinfo->argtypes = (Oid *) palloc(pinfo->nargs * sizeof(Oid));
909 33864 : pinfo->argnames = (char **) palloc(pinfo->nargs * sizeof(char *));
910 103804 : for (int i = 0; i < list_length(parameterTypes); i++)
911 : {
912 69946 : char *s = strVal(list_nth(inParameterNames, i));
913 :
914 69946 : pinfo->argtypes[i] = list_nth_oid(parameterTypes, i);
915 69946 : if (IsPolymorphicType(pinfo->argtypes[i]))
916 6 : ereport(ERROR,
917 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
918 : errmsg("SQL function with unquoted function body cannot have polymorphic arguments")));
919 :
920 69940 : if (s[0] != '\0')
921 10326 : pinfo->argnames[i] = s;
922 : else
923 59614 : pinfo->argnames[i] = NULL;
924 : }
925 :
926 33858 : if (IsA(sql_body_in, List))
927 : {
928 4296 : List *stmts = linitial_node(List, castNode(List, sql_body_in));
929 : ListCell *lc;
930 4296 : List *transformed_stmts = NIL;
931 :
932 8584 : foreach(lc, stmts)
933 : {
934 4294 : Node *stmt = lfirst(lc);
935 : Query *q;
936 4294 : ParseState *pstate = make_parsestate(NULL);
937 :
938 4294 : pstate->p_sourcetext = queryString;
939 4294 : sql_fn_parser_setup(pstate, pinfo);
940 4294 : q = transformStmt(pstate, stmt);
941 4294 : if (q->commandType == CMD_UTILITY)
942 6 : ereport(ERROR,
943 : errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
944 : errmsg("%s is not yet supported in unquoted SQL function body",
945 : GetCommandTagName(CreateCommandTag(q->utilityStmt))));
946 4288 : transformed_stmts = lappend(transformed_stmts, q);
947 4288 : free_parsestate(pstate);
948 : }
949 :
950 4290 : *sql_body_out = (Node *) list_make1(transformed_stmts);
951 : }
952 : else
953 : {
954 : Query *q;
955 29562 : ParseState *pstate = make_parsestate(NULL);
956 :
957 29562 : pstate->p_sourcetext = queryString;
958 29562 : sql_fn_parser_setup(pstate, pinfo);
959 29562 : q = transformStmt(pstate, sql_body_in);
960 29556 : if (q->commandType == CMD_UTILITY)
961 0 : ereport(ERROR,
962 : errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
963 : errmsg("%s is not yet supported in unquoted SQL function body",
964 : GetCommandTagName(CreateCommandTag(q->utilityStmt))));
965 29556 : free_parsestate(pstate);
966 :
967 29556 : *sql_body_out = (Node *) q;
968 : }
969 :
970 : /*
971 : * We must put something in prosrc. For the moment, just record an
972 : * empty string. It might be useful to store the original text of the
973 : * CREATE FUNCTION statement --- but to make actual use of that in
974 : * error reports, we'd also have to adjust readfuncs.c to not throw
975 : * away node location fields when reading prosqlbody.
976 : */
977 33846 : *prosrc_str_p = pstrdup("");
978 :
979 : /* But we definitely don't need probin. */
980 33846 : *probin_str_p = NULL;
981 : }
982 : else
983 : {
984 : /* Everything else wants the given string in prosrc. */
985 27168 : *prosrc_str_p = strVal(linitial(as));
986 27168 : *probin_str_p = NULL;
987 :
988 27168 : if (list_length(as) != 1)
989 6 : ereport(ERROR,
990 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
991 : errmsg("only one AS item needed for language \"%s\"",
992 : languageName)));
993 :
994 27162 : if (languageOid == INTERNALlanguageId)
995 : {
996 : /*
997 : * In PostgreSQL versions before 6.5, the SQL name of the created
998 : * function could not be different from the internal name, and
999 : * "prosrc" wasn't used. So there is code out there that does
1000 : * CREATE FUNCTION xyz AS '' LANGUAGE internal. To preserve some
1001 : * modicum of backwards compatibility, accept an empty "prosrc"
1002 : * value as meaning the supplied SQL function name.
1003 : */
1004 18826 : if (strlen(*prosrc_str_p) == 0)
1005 0 : *prosrc_str_p = funcname;
1006 : }
1007 : }
1008 68014 : }
1009 :
1010 :
1011 : /*
1012 : * CreateFunction
1013 : * Execute a CREATE FUNCTION (or CREATE PROCEDURE) utility statement.
1014 : */
1015 : ObjectAddress
1016 68142 : CreateFunction(ParseState *pstate, CreateFunctionStmt *stmt)
1017 : {
1018 : char *probin_str;
1019 : char *prosrc_str;
1020 : Node *prosqlbody;
1021 : Oid prorettype;
1022 : bool returnsSet;
1023 : char *language;
1024 : Oid languageOid;
1025 : Oid languageValidator;
1026 68142 : Node *transformDefElem = NULL;
1027 : char *funcname;
1028 : Oid namespaceId;
1029 : AclResult aclresult;
1030 : oidvector *parameterTypes;
1031 68142 : List *parameterTypes_list = NIL;
1032 : ArrayType *allParameterTypes;
1033 : ArrayType *parameterModes;
1034 : ArrayType *parameterNames;
1035 68142 : List *inParameterNames_list = NIL;
1036 : List *parameterDefaults;
1037 : Oid variadicArgType;
1038 68142 : List *trftypes_list = NIL;
1039 : ArrayType *trftypes;
1040 : Oid requiredResultType;
1041 : bool isWindowFunc,
1042 : isStrict,
1043 : security,
1044 : isLeakProof;
1045 : char volatility;
1046 : ArrayType *proconfig;
1047 : float4 procost;
1048 : float4 prorows;
1049 : Oid prosupport;
1050 : HeapTuple languageTuple;
1051 : Form_pg_language languageStruct;
1052 : List *as_clause;
1053 : char parallel;
1054 :
1055 : /* Convert list of names to a name and namespace */
1056 68142 : namespaceId = QualifiedNameGetCreationNamespace(stmt->funcname,
1057 : &funcname);
1058 :
1059 : /* Check we have creation rights in target namespace */
1060 68142 : aclresult = object_aclcheck(NamespaceRelationId, namespaceId, GetUserId(), ACL_CREATE);
1061 68142 : if (aclresult != ACLCHECK_OK)
1062 0 : aclcheck_error(aclresult, OBJECT_SCHEMA,
1063 0 : get_namespace_name(namespaceId));
1064 :
1065 : /* Set default attributes */
1066 68142 : as_clause = NIL;
1067 68142 : language = NULL;
1068 68142 : isWindowFunc = false;
1069 68142 : isStrict = false;
1070 68142 : security = false;
1071 68142 : isLeakProof = false;
1072 68142 : volatility = PROVOLATILE_VOLATILE;
1073 68142 : proconfig = NULL;
1074 68142 : procost = -1; /* indicates not set */
1075 68142 : prorows = -1; /* indicates not set */
1076 68142 : prosupport = InvalidOid;
1077 68142 : parallel = PROPARALLEL_UNSAFE;
1078 :
1079 : /* Extract non-default attributes from stmt->options list */
1080 68142 : compute_function_attributes(pstate,
1081 68142 : stmt->is_procedure,
1082 : stmt->options,
1083 : &as_clause, &language, &transformDefElem,
1084 : &isWindowFunc, &volatility,
1085 : &isStrict, &security, &isLeakProof,
1086 : &proconfig, &procost, &prorows,
1087 : &prosupport, ¶llel);
1088 :
1089 68130 : if (!language)
1090 : {
1091 56 : if (stmt->sql_body)
1092 56 : language = "sql";
1093 : else
1094 0 : ereport(ERROR,
1095 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
1096 : errmsg("no language specified")));
1097 : }
1098 :
1099 : /* Look up the language and validate permissions */
1100 68130 : languageTuple = SearchSysCache1(LANGNAME, PointerGetDatum(language));
1101 68130 : if (!HeapTupleIsValid(languageTuple))
1102 0 : ereport(ERROR,
1103 : (errcode(ERRCODE_UNDEFINED_OBJECT),
1104 : errmsg("language \"%s\" does not exist", language),
1105 : (extension_file_exists(language) ?
1106 : errhint("Use CREATE EXTENSION to load the language into the database.") : 0)));
1107 :
1108 68130 : languageStruct = (Form_pg_language) GETSTRUCT(languageTuple);
1109 68130 : languageOid = languageStruct->oid;
1110 :
1111 68130 : if (languageStruct->lanpltrusted)
1112 : {
1113 : /* if trusted language, need USAGE privilege */
1114 41758 : aclresult = object_aclcheck(LanguageRelationId, languageOid, GetUserId(), ACL_USAGE);
1115 41758 : if (aclresult != ACLCHECK_OK)
1116 8 : aclcheck_error(aclresult, OBJECT_LANGUAGE,
1117 8 : NameStr(languageStruct->lanname));
1118 : }
1119 : else
1120 : {
1121 : /* if untrusted language, must be superuser */
1122 26372 : if (!superuser())
1123 0 : aclcheck_error(ACLCHECK_NO_PRIV, OBJECT_LANGUAGE,
1124 0 : NameStr(languageStruct->lanname));
1125 : }
1126 :
1127 68122 : languageValidator = languageStruct->lanvalidator;
1128 :
1129 68122 : ReleaseSysCache(languageTuple);
1130 :
1131 : /*
1132 : * Only superuser is allowed to create leakproof functions because
1133 : * leakproof functions can see tuples which have not yet been filtered out
1134 : * by security barrier views or row-level security policies.
1135 : */
1136 68122 : if (isLeakProof && !superuser())
1137 6 : ereport(ERROR,
1138 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
1139 : errmsg("only superuser can define a leakproof function")));
1140 :
1141 68116 : if (transformDefElem)
1142 : {
1143 : ListCell *lc;
1144 :
1145 240 : foreach(lc, castNode(List, transformDefElem))
1146 : {
1147 122 : Oid typeid = typenameTypeId(NULL,
1148 122 : lfirst_node(TypeName, lc));
1149 122 : Oid elt = get_base_element_type(typeid);
1150 :
1151 122 : typeid = elt ? elt : typeid;
1152 :
1153 122 : get_transform_oid(typeid, languageOid, false);
1154 122 : trftypes_list = lappend_oid(trftypes_list, typeid);
1155 : }
1156 : }
1157 :
1158 : /*
1159 : * Convert remaining parameters of CREATE to form wanted by
1160 : * ProcedureCreate.
1161 : */
1162 68116 : interpret_function_parameter_list(pstate,
1163 : stmt->parameters,
1164 : languageOid,
1165 68116 : stmt->is_procedure ? OBJECT_PROCEDURE : OBJECT_FUNCTION,
1166 : ¶meterTypes,
1167 : ¶meterTypes_list,
1168 : &allParameterTypes,
1169 : ¶meterModes,
1170 : ¶meterNames,
1171 : &inParameterNames_list,
1172 : ¶meterDefaults,
1173 : &variadicArgType,
1174 : &requiredResultType);
1175 :
1176 68062 : if (stmt->is_procedure)
1177 : {
1178 : Assert(!stmt->returnType);
1179 278 : prorettype = requiredResultType ? requiredResultType : VOIDOID;
1180 278 : returnsSet = false;
1181 : }
1182 67784 : else if (stmt->returnType)
1183 : {
1184 : /* explicit RETURNS clause */
1185 67326 : compute_return_type(stmt->returnType, languageOid,
1186 : &prorettype, &returnsSet);
1187 67320 : if (OidIsValid(requiredResultType) && prorettype != requiredResultType)
1188 12 : ereport(ERROR,
1189 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
1190 : errmsg("function result type must be %s because of OUT parameters",
1191 : format_type_be(requiredResultType))));
1192 : }
1193 458 : else if (OidIsValid(requiredResultType))
1194 : {
1195 : /* default RETURNS clause from OUT parameters */
1196 458 : prorettype = requiredResultType;
1197 458 : returnsSet = false;
1198 : }
1199 : else
1200 : {
1201 0 : ereport(ERROR,
1202 : (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
1203 : errmsg("function result type must be specified")));
1204 : /* Alternative possibility: default to RETURNS VOID */
1205 : prorettype = VOIDOID;
1206 : returnsSet = false;
1207 : }
1208 :
1209 68044 : if (trftypes_list != NIL)
1210 : {
1211 : ListCell *lc;
1212 : Datum *arr;
1213 : int i;
1214 :
1215 118 : arr = palloc(list_length(trftypes_list) * sizeof(Datum));
1216 118 : i = 0;
1217 240 : foreach(lc, trftypes_list)
1218 122 : arr[i++] = ObjectIdGetDatum(lfirst_oid(lc));
1219 118 : trftypes = construct_array_builtin(arr, list_length(trftypes_list), OIDOID);
1220 : }
1221 : else
1222 : {
1223 : /* store SQL NULL instead of empty array */
1224 67926 : trftypes = NULL;
1225 : }
1226 :
1227 68044 : interpret_AS_clause(languageOid, language, funcname, as_clause, stmt->sql_body,
1228 : parameterTypes_list, inParameterNames_list,
1229 : &prosrc_str, &probin_str, &prosqlbody,
1230 : pstate->p_sourcetext);
1231 :
1232 : /*
1233 : * Set default values for COST and ROWS depending on other parameters;
1234 : * reject ROWS if it's not returnsSet. NB: pg_dump knows these default
1235 : * values, keep it in sync if you change them.
1236 : */
1237 68014 : if (procost < 0)
1238 : {
1239 : /* SQL and PL-language functions are assumed more expensive */
1240 40898 : if (languageOid == INTERNALlanguageId ||
1241 : languageOid == ClanguageId)
1242 22822 : procost = 1;
1243 : else
1244 18076 : procost = 100;
1245 : }
1246 68014 : if (prorows < 0)
1247 : {
1248 64996 : if (returnsSet)
1249 4254 : prorows = 1000;
1250 : else
1251 60742 : prorows = 0; /* dummy value if not returnsSet */
1252 : }
1253 3018 : else if (!returnsSet)
1254 0 : ereport(ERROR,
1255 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1256 : errmsg("ROWS is not applicable when function does not return a set")));
1257 :
1258 : /*
1259 : * And now that we have all the parameters, and know we're permitted to do
1260 : * so, go ahead and create the function.
1261 : */
1262 136028 : return ProcedureCreate(funcname,
1263 : namespaceId,
1264 68014 : stmt->replace,
1265 : returnsSet,
1266 : prorettype,
1267 : GetUserId(),
1268 : languageOid,
1269 : languageValidator,
1270 : prosrc_str, /* converted to text later */
1271 : probin_str, /* converted to text later */
1272 : prosqlbody,
1273 68014 : stmt->is_procedure ? PROKIND_PROCEDURE : (isWindowFunc ? PROKIND_WINDOW : PROKIND_FUNCTION),
1274 : security,
1275 : isLeakProof,
1276 : isStrict,
1277 : volatility,
1278 : parallel,
1279 : parameterTypes,
1280 : PointerGetDatum(allParameterTypes),
1281 : PointerGetDatum(parameterModes),
1282 : PointerGetDatum(parameterNames),
1283 : parameterDefaults,
1284 : PointerGetDatum(trftypes),
1285 : PointerGetDatum(proconfig),
1286 : prosupport,
1287 : procost,
1288 : prorows);
1289 : }
1290 :
1291 : /*
1292 : * Guts of function deletion.
1293 : *
1294 : * Note: this is also used for aggregate deletion, since the OIDs of
1295 : * both functions and aggregates point to pg_proc.
1296 : */
1297 : void
1298 6146 : RemoveFunctionById(Oid funcOid)
1299 : {
1300 : Relation relation;
1301 : HeapTuple tup;
1302 : char prokind;
1303 :
1304 : /*
1305 : * Delete the pg_proc tuple.
1306 : */
1307 6146 : relation = table_open(ProcedureRelationId, RowExclusiveLock);
1308 :
1309 6146 : tup = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcOid));
1310 6146 : if (!HeapTupleIsValid(tup)) /* should not happen */
1311 0 : elog(ERROR, "cache lookup failed for function %u", funcOid);
1312 :
1313 6146 : prokind = ((Form_pg_proc) GETSTRUCT(tup))->prokind;
1314 :
1315 6146 : CatalogTupleDelete(relation, &tup->t_self);
1316 :
1317 6146 : ReleaseSysCache(tup);
1318 :
1319 6146 : table_close(relation, RowExclusiveLock);
1320 :
1321 6146 : pgstat_drop_function(funcOid);
1322 :
1323 : /*
1324 : * If there's a pg_aggregate tuple, delete that too.
1325 : */
1326 6146 : if (prokind == PROKIND_AGGREGATE)
1327 : {
1328 118 : relation = table_open(AggregateRelationId, RowExclusiveLock);
1329 :
1330 118 : tup = SearchSysCache1(AGGFNOID, ObjectIdGetDatum(funcOid));
1331 118 : if (!HeapTupleIsValid(tup)) /* should not happen */
1332 0 : elog(ERROR, "cache lookup failed for pg_aggregate tuple for function %u", funcOid);
1333 :
1334 118 : CatalogTupleDelete(relation, &tup->t_self);
1335 :
1336 118 : ReleaseSysCache(tup);
1337 :
1338 118 : table_close(relation, RowExclusiveLock);
1339 : }
1340 6146 : }
1341 :
1342 : /*
1343 : * Implements the ALTER FUNCTION utility command (except for the
1344 : * RENAME and OWNER clauses, which are handled as part of the generic
1345 : * ALTER framework).
1346 : */
1347 : ObjectAddress
1348 632 : AlterFunction(ParseState *pstate, AlterFunctionStmt *stmt)
1349 : {
1350 : HeapTuple tup;
1351 : Oid funcOid;
1352 : Form_pg_proc procForm;
1353 : bool is_procedure;
1354 : Relation rel;
1355 : ListCell *l;
1356 632 : DefElem *volatility_item = NULL;
1357 632 : DefElem *strict_item = NULL;
1358 632 : DefElem *security_def_item = NULL;
1359 632 : DefElem *leakproof_item = NULL;
1360 632 : List *set_items = NIL;
1361 632 : DefElem *cost_item = NULL;
1362 632 : DefElem *rows_item = NULL;
1363 632 : DefElem *support_item = NULL;
1364 632 : DefElem *parallel_item = NULL;
1365 : ObjectAddress address;
1366 :
1367 632 : rel = table_open(ProcedureRelationId, RowExclusiveLock);
1368 :
1369 632 : funcOid = LookupFuncWithArgs(stmt->objtype, stmt->func, false);
1370 :
1371 614 : ObjectAddressSet(address, ProcedureRelationId, funcOid);
1372 :
1373 614 : tup = SearchSysCacheCopy1(PROCOID, ObjectIdGetDatum(funcOid));
1374 614 : if (!HeapTupleIsValid(tup)) /* should not happen */
1375 0 : elog(ERROR, "cache lookup failed for function %u", funcOid);
1376 :
1377 614 : procForm = (Form_pg_proc) GETSTRUCT(tup);
1378 :
1379 : /* Permission check: must own function */
1380 614 : if (!object_ownercheck(ProcedureRelationId, funcOid, GetUserId()))
1381 0 : aclcheck_error(ACLCHECK_NOT_OWNER, stmt->objtype,
1382 0 : NameListToString(stmt->func->objname));
1383 :
1384 614 : if (procForm->prokind == PROKIND_AGGREGATE)
1385 0 : ereport(ERROR,
1386 : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1387 : errmsg("\"%s\" is an aggregate function",
1388 : NameListToString(stmt->func->objname))));
1389 :
1390 614 : is_procedure = (procForm->prokind == PROKIND_PROCEDURE);
1391 :
1392 : /* Examine requested actions. */
1393 1222 : foreach(l, stmt->actions)
1394 : {
1395 614 : DefElem *defel = (DefElem *) lfirst(l);
1396 :
1397 614 : if (compute_common_attribute(pstate,
1398 : is_procedure,
1399 : defel,
1400 : &volatility_item,
1401 : &strict_item,
1402 : &security_def_item,
1403 : &leakproof_item,
1404 : &set_items,
1405 : &cost_item,
1406 : &rows_item,
1407 : &support_item,
1408 608 : ¶llel_item) == false)
1409 0 : elog(ERROR, "option \"%s\" not recognized", defel->defname);
1410 : }
1411 :
1412 608 : if (volatility_item)
1413 34 : procForm->provolatile = interpret_func_volatility(volatility_item);
1414 608 : if (strict_item)
1415 24 : procForm->proisstrict = boolVal(strict_item->arg);
1416 608 : if (security_def_item)
1417 12 : procForm->prosecdef = boolVal(security_def_item->arg);
1418 608 : if (leakproof_item)
1419 : {
1420 24 : procForm->proleakproof = boolVal(leakproof_item->arg);
1421 24 : if (procForm->proleakproof && !superuser())
1422 6 : ereport(ERROR,
1423 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
1424 : errmsg("only superuser can define a leakproof function")));
1425 : }
1426 602 : if (cost_item)
1427 : {
1428 12 : procForm->procost = defGetNumeric(cost_item);
1429 12 : if (procForm->procost <= 0)
1430 0 : ereport(ERROR,
1431 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1432 : errmsg("COST must be positive")));
1433 : }
1434 602 : if (rows_item)
1435 : {
1436 0 : procForm->prorows = defGetNumeric(rows_item);
1437 0 : if (procForm->prorows <= 0)
1438 0 : ereport(ERROR,
1439 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1440 : errmsg("ROWS must be positive")));
1441 0 : if (!procForm->proretset)
1442 0 : ereport(ERROR,
1443 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1444 : errmsg("ROWS is not applicable when function does not return a set")));
1445 : }
1446 602 : if (support_item)
1447 : {
1448 : /* interpret_func_support handles the privilege check */
1449 6 : Oid newsupport = interpret_func_support(support_item);
1450 :
1451 : /* Add or replace dependency on support function */
1452 6 : if (OidIsValid(procForm->prosupport))
1453 0 : changeDependencyFor(ProcedureRelationId, funcOid,
1454 : ProcedureRelationId, procForm->prosupport,
1455 : newsupport);
1456 : else
1457 : {
1458 : ObjectAddress referenced;
1459 :
1460 6 : referenced.classId = ProcedureRelationId;
1461 6 : referenced.objectId = newsupport;
1462 6 : referenced.objectSubId = 0;
1463 6 : recordDependencyOn(&address, &referenced, DEPENDENCY_NORMAL);
1464 : }
1465 :
1466 6 : procForm->prosupport = newsupport;
1467 : }
1468 602 : if (parallel_item)
1469 478 : procForm->proparallel = interpret_func_parallel(parallel_item);
1470 602 : if (set_items)
1471 : {
1472 : Datum datum;
1473 : bool isnull;
1474 : ArrayType *a;
1475 : Datum repl_val[Natts_pg_proc];
1476 : bool repl_null[Natts_pg_proc];
1477 : bool repl_repl[Natts_pg_proc];
1478 :
1479 : /* extract existing proconfig setting */
1480 18 : datum = SysCacheGetAttr(PROCOID, tup, Anum_pg_proc_proconfig, &isnull);
1481 18 : a = isnull ? NULL : DatumGetArrayTypeP(datum);
1482 :
1483 : /* update according to each SET or RESET item, left to right */
1484 18 : a = update_proconfig_value(a, set_items);
1485 :
1486 : /* update the tuple */
1487 18 : memset(repl_repl, false, sizeof(repl_repl));
1488 18 : repl_repl[Anum_pg_proc_proconfig - 1] = true;
1489 :
1490 18 : if (a == NULL)
1491 : {
1492 12 : repl_val[Anum_pg_proc_proconfig - 1] = (Datum) 0;
1493 12 : repl_null[Anum_pg_proc_proconfig - 1] = true;
1494 : }
1495 : else
1496 : {
1497 6 : repl_val[Anum_pg_proc_proconfig - 1] = PointerGetDatum(a);
1498 6 : repl_null[Anum_pg_proc_proconfig - 1] = false;
1499 : }
1500 :
1501 18 : tup = heap_modify_tuple(tup, RelationGetDescr(rel),
1502 : repl_val, repl_null, repl_repl);
1503 : }
1504 : /* DO NOT put more touches of procForm below here; it's now dangling. */
1505 :
1506 : /* Do the update */
1507 602 : CatalogTupleUpdate(rel, &tup->t_self, tup);
1508 :
1509 602 : InvokeObjectPostAlterHook(ProcedureRelationId, funcOid, 0);
1510 :
1511 602 : table_close(rel, NoLock);
1512 602 : heap_freetuple(tup);
1513 :
1514 602 : return address;
1515 : }
1516 :
1517 :
1518 : /*
1519 : * CREATE CAST
1520 : */
1521 : ObjectAddress
1522 270 : CreateCast(CreateCastStmt *stmt)
1523 : {
1524 : Oid sourcetypeid;
1525 : Oid targettypeid;
1526 : char sourcetyptype;
1527 : char targettyptype;
1528 : Oid funcid;
1529 270 : Oid incastid = InvalidOid;
1530 270 : Oid outcastid = InvalidOid;
1531 : int nargs;
1532 : char castcontext;
1533 : char castmethod;
1534 : HeapTuple tuple;
1535 : AclResult aclresult;
1536 : ObjectAddress myself;
1537 :
1538 270 : sourcetypeid = typenameTypeId(NULL, stmt->sourcetype);
1539 270 : targettypeid = typenameTypeId(NULL, stmt->targettype);
1540 270 : sourcetyptype = get_typtype(sourcetypeid);
1541 270 : targettyptype = get_typtype(targettypeid);
1542 :
1543 : /* No pseudo-types allowed */
1544 270 : if (sourcetyptype == TYPTYPE_PSEUDO)
1545 0 : ereport(ERROR,
1546 : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1547 : errmsg("source data type %s is a pseudo-type",
1548 : TypeNameToString(stmt->sourcetype))));
1549 :
1550 270 : if (targettyptype == TYPTYPE_PSEUDO)
1551 0 : ereport(ERROR,
1552 : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1553 : errmsg("target data type %s is a pseudo-type",
1554 : TypeNameToString(stmt->targettype))));
1555 :
1556 : /* Permission check */
1557 270 : if (!object_ownercheck(TypeRelationId, sourcetypeid, GetUserId())
1558 12 : && !object_ownercheck(TypeRelationId, targettypeid, GetUserId()))
1559 0 : ereport(ERROR,
1560 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
1561 : errmsg("must be owner of type %s or type %s",
1562 : format_type_be(sourcetypeid),
1563 : format_type_be(targettypeid))));
1564 :
1565 270 : aclresult = object_aclcheck(TypeRelationId, sourcetypeid, GetUserId(), ACL_USAGE);
1566 270 : if (aclresult != ACLCHECK_OK)
1567 6 : aclcheck_error_type(aclresult, sourcetypeid);
1568 :
1569 264 : aclresult = object_aclcheck(TypeRelationId, targettypeid, GetUserId(), ACL_USAGE);
1570 264 : if (aclresult != ACLCHECK_OK)
1571 0 : aclcheck_error_type(aclresult, targettypeid);
1572 :
1573 : /* Domains are allowed for historical reasons, but we warn */
1574 264 : if (sourcetyptype == TYPTYPE_DOMAIN)
1575 6 : ereport(WARNING,
1576 : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1577 : errmsg("cast will be ignored because the source data type is a domain")));
1578 :
1579 258 : else if (targettyptype == TYPTYPE_DOMAIN)
1580 0 : ereport(WARNING,
1581 : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1582 : errmsg("cast will be ignored because the target data type is a domain")));
1583 :
1584 : /* Determine the cast method */
1585 264 : if (stmt->func != NULL)
1586 96 : castmethod = COERCION_METHOD_FUNCTION;
1587 168 : else if (stmt->inout)
1588 6 : castmethod = COERCION_METHOD_INOUT;
1589 : else
1590 162 : castmethod = COERCION_METHOD_BINARY;
1591 :
1592 264 : if (castmethod == COERCION_METHOD_FUNCTION)
1593 : {
1594 : Form_pg_proc procstruct;
1595 :
1596 96 : funcid = LookupFuncWithArgs(OBJECT_FUNCTION, stmt->func, false);
1597 :
1598 96 : tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcid));
1599 96 : if (!HeapTupleIsValid(tuple))
1600 0 : elog(ERROR, "cache lookup failed for function %u", funcid);
1601 :
1602 96 : procstruct = (Form_pg_proc) GETSTRUCT(tuple);
1603 96 : nargs = procstruct->pronargs;
1604 96 : if (nargs < 1 || nargs > 3)
1605 0 : ereport(ERROR,
1606 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1607 : errmsg("cast function must take one to three arguments")));
1608 96 : if (!IsBinaryCoercibleWithCast(sourcetypeid,
1609 : procstruct->proargtypes.values[0],
1610 : &incastid))
1611 0 : ereport(ERROR,
1612 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1613 : errmsg("argument of cast function must match or be binary-coercible from source data type")));
1614 96 : if (nargs > 1 && procstruct->proargtypes.values[1] != INT4OID)
1615 0 : ereport(ERROR,
1616 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1617 : errmsg("second argument of cast function must be type %s",
1618 : "integer")));
1619 96 : if (nargs > 2 && procstruct->proargtypes.values[2] != BOOLOID)
1620 0 : ereport(ERROR,
1621 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1622 : errmsg("third argument of cast function must be type %s",
1623 : "boolean")));
1624 96 : if (!IsBinaryCoercibleWithCast(procstruct->prorettype,
1625 : targettypeid,
1626 : &outcastid))
1627 0 : ereport(ERROR,
1628 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1629 : errmsg("return data type of cast function must match or be binary-coercible to target data type")));
1630 :
1631 : /*
1632 : * Restricting the volatility of a cast function may or may not be a
1633 : * good idea in the abstract, but it definitely breaks many old
1634 : * user-defined types. Disable this check --- tgl 2/1/03
1635 : */
1636 : #ifdef NOT_USED
1637 : if (procstruct->provolatile == PROVOLATILE_VOLATILE)
1638 : ereport(ERROR,
1639 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1640 : errmsg("cast function must not be volatile")));
1641 : #endif
1642 96 : if (procstruct->prokind != PROKIND_FUNCTION)
1643 0 : ereport(ERROR,
1644 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1645 : errmsg("cast function must be a normal function")));
1646 96 : if (procstruct->proretset)
1647 0 : ereport(ERROR,
1648 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1649 : errmsg("cast function must not return a set")));
1650 :
1651 96 : ReleaseSysCache(tuple);
1652 : }
1653 : else
1654 : {
1655 168 : funcid = InvalidOid;
1656 168 : nargs = 0;
1657 : }
1658 :
1659 264 : if (castmethod == COERCION_METHOD_BINARY)
1660 : {
1661 : int16 typ1len;
1662 : int16 typ2len;
1663 : bool typ1byval;
1664 : bool typ2byval;
1665 : char typ1align;
1666 : char typ2align;
1667 :
1668 : /*
1669 : * Must be superuser to create binary-compatible casts, since
1670 : * erroneous casts can easily crash the backend.
1671 : */
1672 162 : if (!superuser())
1673 0 : ereport(ERROR,
1674 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
1675 : errmsg("must be superuser to create a cast WITHOUT FUNCTION")));
1676 :
1677 : /*
1678 : * Also, insist that the types match as to size, alignment, and
1679 : * pass-by-value attributes; this provides at least a crude check that
1680 : * they have similar representations. A pair of types that fail this
1681 : * test should certainly not be equated.
1682 : */
1683 162 : get_typlenbyvalalign(sourcetypeid, &typ1len, &typ1byval, &typ1align);
1684 162 : get_typlenbyvalalign(targettypeid, &typ2len, &typ2byval, &typ2align);
1685 162 : if (typ1len != typ2len ||
1686 162 : typ1byval != typ2byval ||
1687 162 : typ1align != typ2align)
1688 0 : ereport(ERROR,
1689 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1690 : errmsg("source and target data types are not physically compatible")));
1691 :
1692 : /*
1693 : * We know that composite, enum and array types are never binary-
1694 : * compatible with each other. They all have OIDs embedded in them.
1695 : *
1696 : * Theoretically you could build a user-defined base type that is
1697 : * binary-compatible with a composite, enum, or array type. But we
1698 : * disallow that too, as in practice such a cast is surely a mistake.
1699 : * You can always work around that by writing a cast function.
1700 : */
1701 162 : if (sourcetyptype == TYPTYPE_COMPOSITE ||
1702 : targettyptype == TYPTYPE_COMPOSITE)
1703 0 : ereport(ERROR,
1704 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1705 : errmsg("composite data types are not binary-compatible")));
1706 :
1707 162 : if (sourcetyptype == TYPTYPE_ENUM ||
1708 : targettyptype == TYPTYPE_ENUM)
1709 0 : ereport(ERROR,
1710 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1711 : errmsg("enum data types are not binary-compatible")));
1712 :
1713 324 : if (OidIsValid(get_element_type(sourcetypeid)) ||
1714 162 : OidIsValid(get_element_type(targettypeid)))
1715 0 : ereport(ERROR,
1716 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1717 : errmsg("array data types are not binary-compatible")));
1718 :
1719 : /*
1720 : * We also disallow creating binary-compatibility casts involving
1721 : * domains. Casting from a domain to its base type is already
1722 : * allowed, and casting the other way ought to go through domain
1723 : * coercion to permit constraint checking. Again, if you're intent on
1724 : * having your own semantics for that, create a no-op cast function.
1725 : *
1726 : * NOTE: if we were to relax this, the above checks for composites
1727 : * etc. would have to be modified to look through domains to their
1728 : * base types.
1729 : */
1730 162 : if (sourcetyptype == TYPTYPE_DOMAIN ||
1731 : targettyptype == TYPTYPE_DOMAIN)
1732 0 : ereport(ERROR,
1733 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1734 : errmsg("domain data types must not be marked binary-compatible")));
1735 : }
1736 :
1737 : /*
1738 : * Allow source and target types to be same only for length coercion
1739 : * functions. We assume a multi-arg function does length coercion.
1740 : */
1741 264 : if (sourcetypeid == targettypeid && nargs < 2)
1742 0 : ereport(ERROR,
1743 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1744 : errmsg("source data type and target data type are the same")));
1745 :
1746 : /* convert CoercionContext enum to char value for castcontext */
1747 264 : switch (stmt->context)
1748 : {
1749 30 : case COERCION_IMPLICIT:
1750 30 : castcontext = COERCION_CODE_IMPLICIT;
1751 30 : break;
1752 58 : case COERCION_ASSIGNMENT:
1753 58 : castcontext = COERCION_CODE_ASSIGNMENT;
1754 58 : break;
1755 : /* COERCION_PLPGSQL is intentionally not covered here */
1756 176 : case COERCION_EXPLICIT:
1757 176 : castcontext = COERCION_CODE_EXPLICIT;
1758 176 : break;
1759 0 : default:
1760 0 : elog(ERROR, "unrecognized CoercionContext: %d", stmt->context);
1761 : castcontext = 0; /* keep compiler quiet */
1762 : break;
1763 : }
1764 :
1765 264 : myself = CastCreate(sourcetypeid, targettypeid, funcid, incastid, outcastid,
1766 : castcontext, castmethod, DEPENDENCY_NORMAL);
1767 264 : return myself;
1768 : }
1769 :
1770 :
1771 : static void
1772 80 : check_transform_function(Form_pg_proc procstruct)
1773 : {
1774 80 : if (procstruct->provolatile == PROVOLATILE_VOLATILE)
1775 0 : ereport(ERROR,
1776 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1777 : errmsg("transform function must not be volatile")));
1778 80 : if (procstruct->prokind != PROKIND_FUNCTION)
1779 0 : ereport(ERROR,
1780 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1781 : errmsg("transform function must be a normal function")));
1782 80 : if (procstruct->proretset)
1783 0 : ereport(ERROR,
1784 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1785 : errmsg("transform function must not return a set")));
1786 80 : if (procstruct->pronargs != 1)
1787 0 : ereport(ERROR,
1788 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1789 : errmsg("transform function must take one argument")));
1790 80 : if (procstruct->proargtypes.values[0] != INTERNALOID)
1791 2 : ereport(ERROR,
1792 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1793 : errmsg("first argument of transform function must be type %s",
1794 : "internal")));
1795 78 : }
1796 :
1797 :
1798 : /*
1799 : * CREATE TRANSFORM
1800 : */
1801 : ObjectAddress
1802 50 : CreateTransform(CreateTransformStmt *stmt)
1803 : {
1804 : Oid typeid;
1805 : char typtype;
1806 : Oid langid;
1807 : Oid fromsqlfuncid;
1808 : Oid tosqlfuncid;
1809 : AclResult aclresult;
1810 : Form_pg_proc procstruct;
1811 : Datum values[Natts_pg_transform];
1812 50 : bool nulls[Natts_pg_transform] = {0};
1813 50 : bool replaces[Natts_pg_transform] = {0};
1814 : Oid transformid;
1815 : HeapTuple tuple;
1816 : HeapTuple newtuple;
1817 : Relation relation;
1818 : ObjectAddress myself,
1819 : referenced;
1820 : ObjectAddresses *addrs;
1821 : bool is_replace;
1822 :
1823 : /*
1824 : * Get the type
1825 : */
1826 50 : typeid = typenameTypeId(NULL, stmt->type_name);
1827 48 : typtype = get_typtype(typeid);
1828 :
1829 48 : if (typtype == TYPTYPE_PSEUDO)
1830 0 : ereport(ERROR,
1831 : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1832 : errmsg("data type %s is a pseudo-type",
1833 : TypeNameToString(stmt->type_name))));
1834 :
1835 48 : if (typtype == TYPTYPE_DOMAIN)
1836 0 : ereport(ERROR,
1837 : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1838 : errmsg("data type %s is a domain",
1839 : TypeNameToString(stmt->type_name))));
1840 :
1841 48 : if (!object_ownercheck(TypeRelationId, typeid, GetUserId()))
1842 0 : aclcheck_error_type(ACLCHECK_NOT_OWNER, typeid);
1843 :
1844 48 : aclresult = object_aclcheck(TypeRelationId, typeid, GetUserId(), ACL_USAGE);
1845 48 : if (aclresult != ACLCHECK_OK)
1846 0 : aclcheck_error_type(aclresult, typeid);
1847 :
1848 : /*
1849 : * Get the language
1850 : */
1851 48 : langid = get_language_oid(stmt->lang, false);
1852 :
1853 46 : aclresult = object_aclcheck(LanguageRelationId, langid, GetUserId(), ACL_USAGE);
1854 46 : if (aclresult != ACLCHECK_OK)
1855 0 : aclcheck_error(aclresult, OBJECT_LANGUAGE, stmt->lang);
1856 :
1857 : /*
1858 : * Get the functions
1859 : */
1860 46 : if (stmt->fromsql)
1861 : {
1862 44 : fromsqlfuncid = LookupFuncWithArgs(OBJECT_FUNCTION, stmt->fromsql, false);
1863 :
1864 44 : if (!object_ownercheck(ProcedureRelationId, fromsqlfuncid, GetUserId()))
1865 0 : aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_FUNCTION, NameListToString(stmt->fromsql->objname));
1866 :
1867 44 : aclresult = object_aclcheck(ProcedureRelationId, fromsqlfuncid, GetUserId(), ACL_EXECUTE);
1868 44 : if (aclresult != ACLCHECK_OK)
1869 0 : aclcheck_error(aclresult, OBJECT_FUNCTION, NameListToString(stmt->fromsql->objname));
1870 :
1871 44 : tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(fromsqlfuncid));
1872 44 : if (!HeapTupleIsValid(tuple))
1873 0 : elog(ERROR, "cache lookup failed for function %u", fromsqlfuncid);
1874 44 : procstruct = (Form_pg_proc) GETSTRUCT(tuple);
1875 44 : if (procstruct->prorettype != INTERNALOID)
1876 2 : ereport(ERROR,
1877 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1878 : errmsg("return data type of FROM SQL function must be %s",
1879 : "internal")));
1880 42 : check_transform_function(procstruct);
1881 40 : ReleaseSysCache(tuple);
1882 : }
1883 : else
1884 2 : fromsqlfuncid = InvalidOid;
1885 :
1886 42 : if (stmt->tosql)
1887 : {
1888 38 : tosqlfuncid = LookupFuncWithArgs(OBJECT_FUNCTION, stmt->tosql, false);
1889 :
1890 38 : if (!object_ownercheck(ProcedureRelationId, tosqlfuncid, GetUserId()))
1891 0 : aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_FUNCTION, NameListToString(stmt->tosql->objname));
1892 :
1893 38 : aclresult = object_aclcheck(ProcedureRelationId, tosqlfuncid, GetUserId(), ACL_EXECUTE);
1894 38 : if (aclresult != ACLCHECK_OK)
1895 0 : aclcheck_error(aclresult, OBJECT_FUNCTION, NameListToString(stmt->tosql->objname));
1896 :
1897 38 : tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(tosqlfuncid));
1898 38 : if (!HeapTupleIsValid(tuple))
1899 0 : elog(ERROR, "cache lookup failed for function %u", tosqlfuncid);
1900 38 : procstruct = (Form_pg_proc) GETSTRUCT(tuple);
1901 38 : if (procstruct->prorettype != typeid)
1902 0 : ereport(ERROR,
1903 : (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
1904 : errmsg("return data type of TO SQL function must be the transform data type")));
1905 38 : check_transform_function(procstruct);
1906 38 : ReleaseSysCache(tuple);
1907 : }
1908 : else
1909 4 : tosqlfuncid = InvalidOid;
1910 :
1911 : /*
1912 : * Ready to go
1913 : */
1914 42 : values[Anum_pg_transform_trftype - 1] = ObjectIdGetDatum(typeid);
1915 42 : values[Anum_pg_transform_trflang - 1] = ObjectIdGetDatum(langid);
1916 42 : values[Anum_pg_transform_trffromsql - 1] = ObjectIdGetDatum(fromsqlfuncid);
1917 42 : values[Anum_pg_transform_trftosql - 1] = ObjectIdGetDatum(tosqlfuncid);
1918 :
1919 42 : relation = table_open(TransformRelationId, RowExclusiveLock);
1920 :
1921 42 : tuple = SearchSysCache2(TRFTYPELANG,
1922 : ObjectIdGetDatum(typeid),
1923 : ObjectIdGetDatum(langid));
1924 42 : if (HeapTupleIsValid(tuple))
1925 : {
1926 8 : Form_pg_transform form = (Form_pg_transform) GETSTRUCT(tuple);
1927 :
1928 8 : if (!stmt->replace)
1929 2 : ereport(ERROR,
1930 : (errcode(ERRCODE_DUPLICATE_OBJECT),
1931 : errmsg("transform for type %s language \"%s\" already exists",
1932 : format_type_be(typeid),
1933 : stmt->lang)));
1934 :
1935 6 : replaces[Anum_pg_transform_trffromsql - 1] = true;
1936 6 : replaces[Anum_pg_transform_trftosql - 1] = true;
1937 :
1938 6 : newtuple = heap_modify_tuple(tuple, RelationGetDescr(relation), values, nulls, replaces);
1939 6 : CatalogTupleUpdate(relation, &newtuple->t_self, newtuple);
1940 :
1941 6 : transformid = form->oid;
1942 6 : ReleaseSysCache(tuple);
1943 6 : is_replace = true;
1944 : }
1945 : else
1946 : {
1947 34 : transformid = GetNewOidWithIndex(relation, TransformOidIndexId,
1948 : Anum_pg_transform_oid);
1949 34 : values[Anum_pg_transform_oid - 1] = ObjectIdGetDatum(transformid);
1950 34 : newtuple = heap_form_tuple(RelationGetDescr(relation), values, nulls);
1951 34 : CatalogTupleInsert(relation, newtuple);
1952 34 : is_replace = false;
1953 : }
1954 :
1955 40 : if (is_replace)
1956 6 : deleteDependencyRecordsFor(TransformRelationId, transformid, true);
1957 :
1958 40 : addrs = new_object_addresses();
1959 :
1960 : /* make dependency entries */
1961 40 : ObjectAddressSet(myself, TransformRelationId, transformid);
1962 :
1963 : /* dependency on language */
1964 40 : ObjectAddressSet(referenced, LanguageRelationId, langid);
1965 40 : add_exact_object_address(&referenced, addrs);
1966 :
1967 : /* dependency on type */
1968 40 : ObjectAddressSet(referenced, TypeRelationId, typeid);
1969 40 : add_exact_object_address(&referenced, addrs);
1970 :
1971 : /* dependencies on functions */
1972 40 : if (OidIsValid(fromsqlfuncid))
1973 : {
1974 38 : ObjectAddressSet(referenced, ProcedureRelationId, fromsqlfuncid);
1975 38 : add_exact_object_address(&referenced, addrs);
1976 : }
1977 40 : if (OidIsValid(tosqlfuncid))
1978 : {
1979 36 : ObjectAddressSet(referenced, ProcedureRelationId, tosqlfuncid);
1980 36 : add_exact_object_address(&referenced, addrs);
1981 : }
1982 :
1983 40 : record_object_address_dependencies(&myself, addrs, DEPENDENCY_NORMAL);
1984 40 : free_object_addresses(addrs);
1985 :
1986 : /* dependency on extension */
1987 40 : recordDependencyOnCurrentExtension(&myself, is_replace);
1988 :
1989 : /* Post creation hook for new transform */
1990 40 : InvokeObjectPostCreateHook(TransformRelationId, transformid, 0);
1991 :
1992 40 : heap_freetuple(newtuple);
1993 :
1994 40 : table_close(relation, RowExclusiveLock);
1995 :
1996 40 : return myself;
1997 : }
1998 :
1999 :
2000 : /*
2001 : * get_transform_oid - given type OID and language OID, look up a transform OID
2002 : *
2003 : * If missing_ok is false, throw an error if the transform is not found. If
2004 : * true, just return InvalidOid.
2005 : */
2006 : Oid
2007 248830 : get_transform_oid(Oid type_id, Oid lang_id, bool missing_ok)
2008 : {
2009 : Oid oid;
2010 :
2011 248830 : oid = GetSysCacheOid2(TRFTYPELANG, Anum_pg_transform_oid,
2012 : ObjectIdGetDatum(type_id),
2013 : ObjectIdGetDatum(lang_id));
2014 248830 : if (!OidIsValid(oid) && !missing_ok)
2015 0 : ereport(ERROR,
2016 : (errcode(ERRCODE_UNDEFINED_OBJECT),
2017 : errmsg("transform for type %s language \"%s\" does not exist",
2018 : format_type_be(type_id),
2019 : get_language_name(lang_id, false))));
2020 248830 : return oid;
2021 : }
2022 :
2023 :
2024 : /*
2025 : * Subroutine for ALTER FUNCTION/AGGREGATE SET SCHEMA/RENAME
2026 : *
2027 : * Is there a function with the given name and signature already in the given
2028 : * namespace? If so, raise an appropriate error message.
2029 : */
2030 : void
2031 116 : IsThereFunctionInNamespace(const char *proname, int pronargs,
2032 : oidvector *proargtypes, Oid nspOid)
2033 : {
2034 : /* check for duplicate name (more friendly than unique-index failure) */
2035 116 : if (SearchSysCacheExists3(PROCNAMEARGSNSP,
2036 : CStringGetDatum(proname),
2037 : PointerGetDatum(proargtypes),
2038 : ObjectIdGetDatum(nspOid)))
2039 24 : ereport(ERROR,
2040 : (errcode(ERRCODE_DUPLICATE_FUNCTION),
2041 : errmsg("function %s already exists in schema \"%s\"",
2042 : funcname_signature_string(proname, pronargs,
2043 : NIL, proargtypes->values),
2044 : get_namespace_name(nspOid))));
2045 92 : }
2046 :
2047 : /*
2048 : * ExecuteDoStmt
2049 : * Execute inline procedural-language code
2050 : *
2051 : * See at ExecuteCallStmt() about the atomic argument.
2052 : */
2053 : void
2054 1002 : ExecuteDoStmt(ParseState *pstate, DoStmt *stmt, bool atomic)
2055 : {
2056 1002 : InlineCodeBlock *codeblock = makeNode(InlineCodeBlock);
2057 : ListCell *arg;
2058 1002 : DefElem *as_item = NULL;
2059 1002 : DefElem *language_item = NULL;
2060 : char *language;
2061 : Oid laninline;
2062 : HeapTuple languageTuple;
2063 : Form_pg_language languageStruct;
2064 :
2065 : /* Process options we got from gram.y */
2066 2196 : foreach(arg, stmt->args)
2067 : {
2068 1194 : DefElem *defel = (DefElem *) lfirst(arg);
2069 :
2070 1194 : if (strcmp(defel->defname, "as") == 0)
2071 : {
2072 1002 : if (as_item)
2073 0 : errorConflictingDefElem(defel, pstate);
2074 1002 : as_item = defel;
2075 : }
2076 192 : else if (strcmp(defel->defname, "language") == 0)
2077 : {
2078 192 : if (language_item)
2079 0 : errorConflictingDefElem(defel, pstate);
2080 192 : language_item = defel;
2081 : }
2082 : else
2083 0 : elog(ERROR, "option \"%s\" not recognized",
2084 : defel->defname);
2085 : }
2086 :
2087 1002 : if (as_item)
2088 1002 : codeblock->source_text = strVal(as_item->arg);
2089 : else
2090 0 : ereport(ERROR,
2091 : (errcode(ERRCODE_SYNTAX_ERROR),
2092 : errmsg("no inline code specified")));
2093 :
2094 : /* if LANGUAGE option wasn't specified, use the default */
2095 1002 : if (language_item)
2096 192 : language = strVal(language_item->arg);
2097 : else
2098 810 : language = "plpgsql";
2099 :
2100 : /* Look up the language and validate permissions */
2101 1002 : languageTuple = SearchSysCache1(LANGNAME, PointerGetDatum(language));
2102 1002 : if (!HeapTupleIsValid(languageTuple))
2103 0 : ereport(ERROR,
2104 : (errcode(ERRCODE_UNDEFINED_OBJECT),
2105 : errmsg("language \"%s\" does not exist", language),
2106 : (extension_file_exists(language) ?
2107 : errhint("Use CREATE EXTENSION to load the language into the database.") : 0)));
2108 :
2109 1002 : languageStruct = (Form_pg_language) GETSTRUCT(languageTuple);
2110 1002 : codeblock->langOid = languageStruct->oid;
2111 1002 : codeblock->langIsTrusted = languageStruct->lanpltrusted;
2112 1002 : codeblock->atomic = atomic;
2113 :
2114 1002 : if (languageStruct->lanpltrusted)
2115 : {
2116 : /* if trusted language, need USAGE privilege */
2117 : AclResult aclresult;
2118 :
2119 958 : aclresult = object_aclcheck(LanguageRelationId, codeblock->langOid, GetUserId(),
2120 : ACL_USAGE);
2121 958 : if (aclresult != ACLCHECK_OK)
2122 0 : aclcheck_error(aclresult, OBJECT_LANGUAGE,
2123 0 : NameStr(languageStruct->lanname));
2124 : }
2125 : else
2126 : {
2127 : /* if untrusted language, must be superuser */
2128 44 : if (!superuser())
2129 0 : aclcheck_error(ACLCHECK_NO_PRIV, OBJECT_LANGUAGE,
2130 0 : NameStr(languageStruct->lanname));
2131 : }
2132 :
2133 : /* get the handler function's OID */
2134 1002 : laninline = languageStruct->laninline;
2135 1002 : if (!OidIsValid(laninline))
2136 0 : ereport(ERROR,
2137 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2138 : errmsg("language \"%s\" does not support inline code execution",
2139 : NameStr(languageStruct->lanname))));
2140 :
2141 1002 : ReleaseSysCache(languageTuple);
2142 :
2143 : /* execute the inline handler */
2144 1002 : OidFunctionCall1(laninline, PointerGetDatum(codeblock));
2145 636 : }
2146 :
2147 : /*
2148 : * Execute CALL statement
2149 : *
2150 : * Inside a top-level CALL statement, transaction-terminating commands such as
2151 : * COMMIT or a PL-specific equivalent are allowed. The terminology in the SQL
2152 : * standard is that CALL establishes a non-atomic execution context. Most
2153 : * other commands establish an atomic execution context, in which transaction
2154 : * control actions are not allowed. If there are nested executions of CALL,
2155 : * we want to track the execution context recursively, so that the nested
2156 : * CALLs can also do transaction control. Note, however, that for example in
2157 : * CALL -> SELECT -> CALL, the second call cannot do transaction control,
2158 : * because the SELECT in between establishes an atomic execution context.
2159 : *
2160 : * So when ExecuteCallStmt() is called from the top level, we pass in atomic =
2161 : * false (recall that that means transactions = yes). We then create a
2162 : * CallContext node with content atomic = false, which is passed in the
2163 : * fcinfo->context field to the procedure invocation. The language
2164 : * implementation should then take appropriate measures to allow or prevent
2165 : * transaction commands based on that information, e.g., call
2166 : * SPI_connect_ext(SPI_OPT_NONATOMIC). The language should also pass on the
2167 : * atomic flag to any nested invocations to CALL.
2168 : *
2169 : * The expression data structures and execution context that we create
2170 : * within this function are children of the portalContext of the Portal
2171 : * that the CALL utility statement runs in. Therefore, any pass-by-ref
2172 : * values that we're passing to the procedure will survive transaction
2173 : * commits that might occur inside the procedure.
2174 : */
2175 : void
2176 380 : ExecuteCallStmt(CallStmt *stmt, ParamListInfo params, bool atomic, DestReceiver *dest)
2177 : {
2178 380 : LOCAL_FCINFO(fcinfo, FUNC_MAX_ARGS);
2179 : ListCell *lc;
2180 : FuncExpr *fexpr;
2181 : int nargs;
2182 : int i;
2183 : AclResult aclresult;
2184 : FmgrInfo flinfo;
2185 : CallContext *callcontext;
2186 : EState *estate;
2187 : ExprContext *econtext;
2188 : HeapTuple tp;
2189 : PgStat_FunctionCallUsage fcusage;
2190 : Datum retval;
2191 :
2192 380 : fexpr = stmt->funcexpr;
2193 : Assert(fexpr);
2194 : Assert(IsA(fexpr, FuncExpr));
2195 :
2196 380 : aclresult = object_aclcheck(ProcedureRelationId, fexpr->funcid, GetUserId(), ACL_EXECUTE);
2197 380 : if (aclresult != ACLCHECK_OK)
2198 12 : aclcheck_error(aclresult, OBJECT_PROCEDURE, get_func_name(fexpr->funcid));
2199 :
2200 : /* Prep the context object we'll pass to the procedure */
2201 368 : callcontext = makeNode(CallContext);
2202 368 : callcontext->atomic = atomic;
2203 :
2204 368 : tp = SearchSysCache1(PROCOID, ObjectIdGetDatum(fexpr->funcid));
2205 368 : if (!HeapTupleIsValid(tp))
2206 0 : elog(ERROR, "cache lookup failed for function %u", fexpr->funcid);
2207 :
2208 : /*
2209 : * If proconfig is set we can't allow transaction commands because of the
2210 : * way the GUC stacking works: The transaction boundary would have to pop
2211 : * the proconfig setting off the stack. That restriction could be lifted
2212 : * by redesigning the GUC nesting mechanism a bit.
2213 : */
2214 368 : if (!heap_attisnull(tp, Anum_pg_proc_proconfig, NULL))
2215 2 : callcontext->atomic = true;
2216 :
2217 : /*
2218 : * In security definer procedures, we can't allow transaction commands.
2219 : * StartTransaction() insists that the security context stack is empty,
2220 : * and AbortTransaction() resets the security context. This could be
2221 : * reorganized, but right now it doesn't work.
2222 : */
2223 368 : if (((Form_pg_proc) GETSTRUCT(tp))->prosecdef)
2224 2 : callcontext->atomic = true;
2225 :
2226 368 : ReleaseSysCache(tp);
2227 :
2228 : /* safety check; see ExecInitFunc() */
2229 368 : nargs = list_length(fexpr->args);
2230 368 : if (nargs > FUNC_MAX_ARGS)
2231 0 : ereport(ERROR,
2232 : (errcode(ERRCODE_TOO_MANY_ARGUMENTS),
2233 : errmsg_plural("cannot pass more than %d argument to a procedure",
2234 : "cannot pass more than %d arguments to a procedure",
2235 : FUNC_MAX_ARGS,
2236 : FUNC_MAX_ARGS)));
2237 :
2238 : /* Initialize function call structure */
2239 368 : InvokeFunctionExecuteHook(fexpr->funcid);
2240 368 : fmgr_info(fexpr->funcid, &flinfo);
2241 368 : fmgr_info_set_expr((Node *) fexpr, &flinfo);
2242 368 : InitFunctionCallInfoData(*fcinfo, &flinfo, nargs, fexpr->inputcollid,
2243 : (Node *) callcontext, NULL);
2244 :
2245 : /*
2246 : * Evaluate procedure arguments inside a suitable execution context. Note
2247 : * we can't free this context till the procedure returns.
2248 : */
2249 368 : estate = CreateExecutorState();
2250 368 : estate->es_param_list_info = params;
2251 368 : econtext = CreateExprContext(estate);
2252 :
2253 : /*
2254 : * If we're called in non-atomic context, we also have to ensure that the
2255 : * argument expressions run with an up-to-date snapshot. Our caller will
2256 : * have provided a current snapshot in atomic contexts, but not in
2257 : * non-atomic contexts, because the possibility of a COMMIT/ROLLBACK
2258 : * destroying the snapshot makes higher-level management too complicated.
2259 : */
2260 368 : if (!atomic)
2261 342 : PushActiveSnapshot(GetTransactionSnapshot());
2262 :
2263 368 : i = 0;
2264 902 : foreach(lc, fexpr->args)
2265 : {
2266 : ExprState *exprstate;
2267 : Datum val;
2268 : bool isnull;
2269 :
2270 534 : exprstate = ExecPrepareExpr(lfirst(lc), estate);
2271 :
2272 534 : val = ExecEvalExprSwitchContext(exprstate, econtext, &isnull);
2273 :
2274 534 : fcinfo->args[i].value = val;
2275 534 : fcinfo->args[i].isnull = isnull;
2276 :
2277 534 : i++;
2278 : }
2279 :
2280 : /* Get rid of temporary snapshot for arguments, if we made one */
2281 368 : if (!atomic)
2282 342 : PopActiveSnapshot();
2283 :
2284 : /* Here we actually call the procedure */
2285 368 : pgstat_init_function_usage(fcinfo, &fcusage);
2286 368 : retval = FunctionCallInvoke(fcinfo);
2287 338 : pgstat_end_function_usage(&fcusage, true);
2288 :
2289 : /* Handle the procedure's outputs */
2290 338 : if (fexpr->funcresulttype == VOIDOID)
2291 : {
2292 : /* do nothing */
2293 : }
2294 154 : else if (fexpr->funcresulttype == RECORDOID)
2295 : {
2296 : /* send tuple to client */
2297 : HeapTupleHeader td;
2298 : Oid tupType;
2299 : int32 tupTypmod;
2300 : TupleDesc retdesc;
2301 : HeapTupleData rettupdata;
2302 : TupOutputState *tstate;
2303 : TupleTableSlot *slot;
2304 :
2305 154 : if (fcinfo->isnull)
2306 0 : elog(ERROR, "procedure returned null record");
2307 :
2308 : /*
2309 : * Ensure there's an active snapshot whilst we execute whatever's
2310 : * involved here. Note that this is *not* sufficient to make the
2311 : * world safe for TOAST pointers to be included in the returned data:
2312 : * the referenced data could have gone away while we didn't hold a
2313 : * snapshot. Hence, it's incumbent on PLs that can do COMMIT/ROLLBACK
2314 : * to not return TOAST pointers, unless those pointers were fetched
2315 : * after the last COMMIT/ROLLBACK in the procedure.
2316 : *
2317 : * XXX that is a really nasty, hard-to-test requirement. Is there a
2318 : * way to remove it?
2319 : */
2320 154 : EnsurePortalSnapshotExists();
2321 :
2322 154 : td = DatumGetHeapTupleHeader(retval);
2323 154 : tupType = HeapTupleHeaderGetTypeId(td);
2324 154 : tupTypmod = HeapTupleHeaderGetTypMod(td);
2325 154 : retdesc = lookup_rowtype_tupdesc(tupType, tupTypmod);
2326 :
2327 154 : tstate = begin_tup_output_tupdesc(dest, retdesc,
2328 : &TTSOpsHeapTuple);
2329 :
2330 154 : rettupdata.t_len = HeapTupleHeaderGetDatumLength(td);
2331 154 : ItemPointerSetInvalid(&(rettupdata.t_self));
2332 154 : rettupdata.t_tableOid = InvalidOid;
2333 154 : rettupdata.t_data = td;
2334 :
2335 154 : slot = ExecStoreHeapTuple(&rettupdata, tstate->slot, false);
2336 154 : tstate->dest->receiveSlot(slot, tstate->dest);
2337 :
2338 154 : end_tup_output(tstate);
2339 :
2340 154 : ReleaseTupleDesc(retdesc);
2341 : }
2342 : else
2343 0 : elog(ERROR, "unexpected result type for procedure: %u",
2344 : fexpr->funcresulttype);
2345 :
2346 338 : FreeExecutorState(estate);
2347 338 : }
2348 :
2349 : /*
2350 : * Construct the tuple descriptor for a CALL statement return
2351 : */
2352 : TupleDesc
2353 146 : CallStmtResultDesc(CallStmt *stmt)
2354 : {
2355 : FuncExpr *fexpr;
2356 : HeapTuple tuple;
2357 : TupleDesc tupdesc;
2358 :
2359 146 : fexpr = stmt->funcexpr;
2360 :
2361 146 : tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(fexpr->funcid));
2362 146 : if (!HeapTupleIsValid(tuple))
2363 0 : elog(ERROR, "cache lookup failed for procedure %u", fexpr->funcid);
2364 :
2365 146 : tupdesc = build_function_result_tupdesc_t(tuple);
2366 :
2367 146 : ReleaseSysCache(tuple);
2368 :
2369 146 : return tupdesc;
2370 : }
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