Line data Source code
1 : /*-------------------------------------------------------------------------
2 : *
3 : * fmgr.c
4 : * The Postgres function manager.
5 : *
6 : * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
7 : * Portions Copyright (c) 1994, Regents of the University of California
8 : *
9 : *
10 : * IDENTIFICATION
11 : * src/backend/utils/fmgr/fmgr.c
12 : *
13 : *-------------------------------------------------------------------------
14 : */
15 :
16 : #include "postgres.h"
17 :
18 : #include "access/detoast.h"
19 : #include "access/htup_details.h"
20 : #include "catalog/pg_language.h"
21 : #include "catalog/pg_proc.h"
22 : #include "catalog/pg_type.h"
23 : #include "executor/functions.h"
24 : #include "lib/stringinfo.h"
25 : #include "miscadmin.h"
26 : #include "nodes/makefuncs.h"
27 : #include "nodes/miscnodes.h"
28 : #include "nodes/nodeFuncs.h"
29 : #include "pgstat.h"
30 : #include "utils/acl.h"
31 : #include "utils/builtins.h"
32 : #include "utils/fmgrtab.h"
33 : #include "utils/guc.h"
34 : #include "utils/lsyscache.h"
35 : #include "utils/syscache.h"
36 :
37 : /*
38 : * Hooks for function calls
39 : */
40 : PGDLLIMPORT needs_fmgr_hook_type needs_fmgr_hook = NULL;
41 : PGDLLIMPORT fmgr_hook_type fmgr_hook = NULL;
42 :
43 : /*
44 : * Hashtable for fast lookup of external C functions
45 : */
46 : typedef struct
47 : {
48 : /* fn_oid is the hash key and so must be first! */
49 : Oid fn_oid; /* OID of an external C function */
50 : TransactionId fn_xmin; /* for checking up-to-dateness */
51 : ItemPointerData fn_tid;
52 : PGFunction user_fn; /* the function's address */
53 : const Pg_finfo_record *inforec; /* address of its info record */
54 : } CFuncHashTabEntry;
55 :
56 : static HTAB *CFuncHash = NULL;
57 :
58 :
59 : static void fmgr_info_cxt_security(Oid functionId, FmgrInfo *finfo, MemoryContext mcxt,
60 : bool ignore_security);
61 : static void fmgr_info_C_lang(Oid functionId, FmgrInfo *finfo, HeapTuple procedureTuple);
62 : static void fmgr_info_other_lang(Oid functionId, FmgrInfo *finfo, HeapTuple procedureTuple);
63 : static CFuncHashTabEntry *lookup_C_func(HeapTuple procedureTuple);
64 : static void record_C_func(HeapTuple procedureTuple,
65 : PGFunction user_fn, const Pg_finfo_record *inforec);
66 :
67 : /* extern so it's callable via JIT */
68 : extern Datum fmgr_security_definer(PG_FUNCTION_ARGS);
69 :
70 :
71 : /*
72 : * Lookup routines for builtin-function table. We can search by either Oid
73 : * or name, but search by Oid is much faster.
74 : */
75 :
76 : static const FmgrBuiltin *
77 43407460 : fmgr_isbuiltin(Oid id)
78 : {
79 : uint16 index;
80 :
81 : /* fast lookup only possible if original oid still assigned */
82 43407460 : if (id > fmgr_last_builtin_oid)
83 146066 : return NULL;
84 :
85 : /*
86 : * Lookup function data. If there's a miss in that range it's likely a
87 : * nonexistent function, returning NULL here will trigger an ERROR later.
88 : */
89 43261394 : index = fmgr_builtin_oid_index[id];
90 43261394 : if (index == InvalidOidBuiltinMapping)
91 9672 : return NULL;
92 :
93 43251722 : return &fmgr_builtins[index];
94 : }
95 :
96 : /*
97 : * Lookup a builtin by name. Note there can be more than one entry in
98 : * the array with the same name, but they should all point to the same
99 : * routine.
100 : */
101 : static const FmgrBuiltin *
102 7854 : fmgr_lookupByName(const char *name)
103 : {
104 : int i;
105 :
106 11152612 : for (i = 0; i < fmgr_nbuiltins; i++)
107 : {
108 11152606 : if (strcmp(name, fmgr_builtins[i].funcName) == 0)
109 7848 : return fmgr_builtins + i;
110 : }
111 6 : return NULL;
112 : }
113 :
114 : /*
115 : * This routine fills a FmgrInfo struct, given the OID
116 : * of the function to be called.
117 : *
118 : * The caller's CurrentMemoryContext is used as the fn_mcxt of the info
119 : * struct; this means that any subsidiary data attached to the info struct
120 : * (either by fmgr_info itself, or later on by a function call handler)
121 : * will be allocated in that context. The caller must ensure that this
122 : * context is at least as long-lived as the info struct itself. This is
123 : * not a problem in typical cases where the info struct is on the stack or
124 : * in freshly-palloc'd space. However, if one intends to store an info
125 : * struct in a long-lived table, it's better to use fmgr_info_cxt.
126 : */
127 : void
128 40570882 : fmgr_info(Oid functionId, FmgrInfo *finfo)
129 : {
130 40570882 : fmgr_info_cxt_security(functionId, finfo, CurrentMemoryContext, false);
131 40570882 : }
132 :
133 : /*
134 : * Fill a FmgrInfo struct, specifying a memory context in which its
135 : * subsidiary data should go.
136 : */
137 : void
138 2801852 : fmgr_info_cxt(Oid functionId, FmgrInfo *finfo, MemoryContext mcxt)
139 : {
140 2801852 : fmgr_info_cxt_security(functionId, finfo, mcxt, false);
141 2801852 : }
142 :
143 : /*
144 : * This one does the actual work. ignore_security is ordinarily false
145 : * but is set to true when we need to avoid recursion.
146 : */
147 : static void
148 43407460 : fmgr_info_cxt_security(Oid functionId, FmgrInfo *finfo, MemoryContext mcxt,
149 : bool ignore_security)
150 : {
151 : const FmgrBuiltin *fbp;
152 : HeapTuple procedureTuple;
153 : Form_pg_proc procedureStruct;
154 : Datum prosrcdatum;
155 : char *prosrc;
156 :
157 : /*
158 : * fn_oid *must* be filled in last. Some code assumes that if fn_oid is
159 : * valid, the whole struct is valid. Some FmgrInfo struct's do survive
160 : * elogs.
161 : */
162 43407460 : finfo->fn_oid = InvalidOid;
163 43407460 : finfo->fn_extra = NULL;
164 43407460 : finfo->fn_mcxt = mcxt;
165 43407460 : finfo->fn_expr = NULL; /* caller may set this later */
166 :
167 43407460 : if ((fbp = fmgr_isbuiltin(functionId)) != NULL)
168 : {
169 : /*
170 : * Fast path for builtin functions: don't bother consulting pg_proc
171 : */
172 43251722 : finfo->fn_nargs = fbp->nargs;
173 43251722 : finfo->fn_strict = fbp->strict;
174 43251722 : finfo->fn_retset = fbp->retset;
175 43251722 : finfo->fn_stats = TRACK_FUNC_ALL; /* ie, never track */
176 43251722 : finfo->fn_addr = fbp->func;
177 43251722 : finfo->fn_oid = functionId;
178 43251722 : return;
179 : }
180 :
181 : /* Otherwise we need the pg_proc entry */
182 155738 : procedureTuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(functionId));
183 155738 : if (!HeapTupleIsValid(procedureTuple))
184 0 : elog(ERROR, "cache lookup failed for function %u", functionId);
185 155738 : procedureStruct = (Form_pg_proc) GETSTRUCT(procedureTuple);
186 :
187 155738 : finfo->fn_nargs = procedureStruct->pronargs;
188 155738 : finfo->fn_strict = procedureStruct->proisstrict;
189 155738 : finfo->fn_retset = procedureStruct->proretset;
190 :
191 : /*
192 : * If it has prosecdef set, non-null proconfig, or if a plugin wants to
193 : * hook function entry/exit, use fmgr_security_definer call handler ---
194 : * unless we are being called again by fmgr_security_definer or
195 : * fmgr_info_other_lang.
196 : *
197 : * When using fmgr_security_definer, function stats tracking is always
198 : * disabled at the outer level, and instead we set the flag properly in
199 : * fmgr_security_definer's private flinfo and implement the tracking
200 : * inside fmgr_security_definer. This loses the ability to charge the
201 : * overhead of fmgr_security_definer to the function, but gains the
202 : * ability to set the track_functions GUC as a local GUC parameter of an
203 : * interesting function and have the right things happen.
204 : */
205 155738 : if (!ignore_security &&
206 121012 : (procedureStruct->prosecdef ||
207 120728 : !heap_attisnull(procedureTuple, Anum_pg_proc_proconfig, NULL) ||
208 120590 : FmgrHookIsNeeded(functionId)))
209 : {
210 422 : finfo->fn_addr = fmgr_security_definer;
211 422 : finfo->fn_stats = TRACK_FUNC_ALL; /* ie, never track */
212 422 : finfo->fn_oid = functionId;
213 422 : ReleaseSysCache(procedureTuple);
214 422 : return;
215 : }
216 :
217 155316 : switch (procedureStruct->prolang)
218 : {
219 2726 : case INTERNALlanguageId:
220 :
221 : /*
222 : * For an ordinary builtin function, we should never get here
223 : * because the fmgr_isbuiltin() search above will have succeeded.
224 : * However, if the user has done a CREATE FUNCTION to create an
225 : * alias for a builtin function, we can end up here. In that case
226 : * we have to look up the function by name. The name of the
227 : * internal function is stored in prosrc (it doesn't have to be
228 : * the same as the name of the alias!)
229 : */
230 2726 : prosrcdatum = SysCacheGetAttrNotNull(PROCOID, procedureTuple,
231 : Anum_pg_proc_prosrc);
232 2726 : prosrc = TextDatumGetCString(prosrcdatum);
233 2726 : fbp = fmgr_lookupByName(prosrc);
234 2726 : if (fbp == NULL)
235 0 : ereport(ERROR,
236 : (errcode(ERRCODE_UNDEFINED_FUNCTION),
237 : errmsg("internal function \"%s\" is not in internal lookup table",
238 : prosrc)));
239 2726 : pfree(prosrc);
240 : /* Should we check that nargs, strict, retset match the table? */
241 2726 : finfo->fn_addr = fbp->func;
242 : /* note this policy is also assumed in fast path above */
243 2726 : finfo->fn_stats = TRACK_FUNC_ALL; /* ie, never track */
244 2726 : break;
245 :
246 101168 : case ClanguageId:
247 101168 : fmgr_info_C_lang(functionId, finfo, procedureTuple);
248 101168 : finfo->fn_stats = TRACK_FUNC_PL; /* ie, track if ALL */
249 101168 : break;
250 :
251 17106 : case SQLlanguageId:
252 17106 : finfo->fn_addr = fmgr_sql;
253 17106 : finfo->fn_stats = TRACK_FUNC_PL; /* ie, track if ALL */
254 17106 : break;
255 :
256 34316 : default:
257 34316 : fmgr_info_other_lang(functionId, finfo, procedureTuple);
258 34316 : finfo->fn_stats = TRACK_FUNC_OFF; /* ie, track if not OFF */
259 34316 : break;
260 : }
261 :
262 155316 : finfo->fn_oid = functionId;
263 155316 : ReleaseSysCache(procedureTuple);
264 : }
265 :
266 : /*
267 : * Return module and C function name providing implementation of functionId.
268 : *
269 : * If *mod == NULL and *fn == NULL, no C symbol is known to implement
270 : * function.
271 : *
272 : * If *mod == NULL and *fn != NULL, the function is implemented by a symbol in
273 : * the main binary.
274 : *
275 : * If *mod != NULL and *fn != NULL the function is implemented in an extension
276 : * shared object.
277 : *
278 : * The returned module and function names are pstrdup'ed into the current
279 : * memory context.
280 : */
281 : void
282 6422 : fmgr_symbol(Oid functionId, char **mod, char **fn)
283 : {
284 : HeapTuple procedureTuple;
285 : Form_pg_proc procedureStruct;
286 : Datum prosrcattr;
287 : Datum probinattr;
288 :
289 6422 : procedureTuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(functionId));
290 6422 : if (!HeapTupleIsValid(procedureTuple))
291 0 : elog(ERROR, "cache lookup failed for function %u", functionId);
292 6422 : procedureStruct = (Form_pg_proc) GETSTRUCT(procedureTuple);
293 :
294 6422 : if (procedureStruct->prosecdef ||
295 6422 : !heap_attisnull(procedureTuple, Anum_pg_proc_proconfig, NULL) ||
296 6422 : FmgrHookIsNeeded(functionId))
297 : {
298 0 : *mod = NULL; /* core binary */
299 0 : *fn = pstrdup("fmgr_security_definer");
300 0 : ReleaseSysCache(procedureTuple);
301 0 : return;
302 : }
303 :
304 : /* see fmgr_info_cxt_security for the individual cases */
305 6422 : switch (procedureStruct->prolang)
306 : {
307 6398 : case INTERNALlanguageId:
308 6398 : prosrcattr = SysCacheGetAttrNotNull(PROCOID, procedureTuple,
309 : Anum_pg_proc_prosrc);
310 :
311 6398 : *mod = NULL; /* core binary */
312 6398 : *fn = TextDatumGetCString(prosrcattr);
313 6398 : break;
314 :
315 0 : case ClanguageId:
316 0 : prosrcattr = SysCacheGetAttrNotNull(PROCOID, procedureTuple,
317 : Anum_pg_proc_prosrc);
318 :
319 0 : probinattr = SysCacheGetAttrNotNull(PROCOID, procedureTuple,
320 : Anum_pg_proc_probin);
321 :
322 : /*
323 : * No need to check symbol presence / API version here, already
324 : * checked in fmgr_info_cxt_security.
325 : */
326 0 : *mod = TextDatumGetCString(probinattr);
327 0 : *fn = TextDatumGetCString(prosrcattr);
328 0 : break;
329 :
330 12 : case SQLlanguageId:
331 12 : *mod = NULL; /* core binary */
332 12 : *fn = pstrdup("fmgr_sql");
333 12 : break;
334 :
335 12 : default:
336 12 : *mod = NULL;
337 12 : *fn = NULL; /* unknown, pass pointer */
338 12 : break;
339 : }
340 :
341 6422 : ReleaseSysCache(procedureTuple);
342 : }
343 :
344 :
345 : /*
346 : * Special fmgr_info processing for C-language functions. Note that
347 : * finfo->fn_oid is not valid yet.
348 : */
349 : static void
350 101168 : fmgr_info_C_lang(Oid functionId, FmgrInfo *finfo, HeapTuple procedureTuple)
351 : {
352 : CFuncHashTabEntry *hashentry;
353 : PGFunction user_fn;
354 : const Pg_finfo_record *inforec;
355 :
356 : /*
357 : * See if we have the function address cached already
358 : */
359 101168 : hashentry = lookup_C_func(procedureTuple);
360 101168 : if (hashentry)
361 : {
362 93702 : user_fn = hashentry->user_fn;
363 93702 : inforec = hashentry->inforec;
364 : }
365 : else
366 : {
367 : Datum prosrcattr,
368 : probinattr;
369 : char *prosrcstring,
370 : *probinstring;
371 : void *libraryhandle;
372 :
373 : /*
374 : * Get prosrc and probin strings (link symbol and library filename).
375 : * While in general these columns might be null, that's not allowed
376 : * for C-language functions.
377 : */
378 7466 : prosrcattr = SysCacheGetAttrNotNull(PROCOID, procedureTuple,
379 : Anum_pg_proc_prosrc);
380 7466 : prosrcstring = TextDatumGetCString(prosrcattr);
381 :
382 7466 : probinattr = SysCacheGetAttrNotNull(PROCOID, procedureTuple,
383 : Anum_pg_proc_probin);
384 7466 : probinstring = TextDatumGetCString(probinattr);
385 :
386 : /* Look up the function itself */
387 7466 : user_fn = load_external_function(probinstring, prosrcstring, true,
388 : &libraryhandle);
389 :
390 : /* Get the function information record (real or default) */
391 7466 : inforec = fetch_finfo_record(libraryhandle, prosrcstring);
392 :
393 : /* Cache the addresses for later calls */
394 7466 : record_C_func(procedureTuple, user_fn, inforec);
395 :
396 7466 : pfree(prosrcstring);
397 7466 : pfree(probinstring);
398 : }
399 :
400 101168 : switch (inforec->api_version)
401 : {
402 101168 : case 1:
403 : /* New style: call directly */
404 101168 : finfo->fn_addr = user_fn;
405 101168 : break;
406 0 : default:
407 : /* Shouldn't get here if fetch_finfo_record did its job */
408 0 : elog(ERROR, "unrecognized function API version: %d",
409 : inforec->api_version);
410 : break;
411 : }
412 101168 : }
413 :
414 : /*
415 : * Special fmgr_info processing for other-language functions. Note
416 : * that finfo->fn_oid is not valid yet.
417 : */
418 : static void
419 34316 : fmgr_info_other_lang(Oid functionId, FmgrInfo *finfo, HeapTuple procedureTuple)
420 : {
421 34316 : Form_pg_proc procedureStruct = (Form_pg_proc) GETSTRUCT(procedureTuple);
422 34316 : Oid language = procedureStruct->prolang;
423 : HeapTuple languageTuple;
424 : Form_pg_language languageStruct;
425 : FmgrInfo plfinfo;
426 :
427 34316 : languageTuple = SearchSysCache1(LANGOID, ObjectIdGetDatum(language));
428 34316 : if (!HeapTupleIsValid(languageTuple))
429 0 : elog(ERROR, "cache lookup failed for language %u", language);
430 34316 : languageStruct = (Form_pg_language) GETSTRUCT(languageTuple);
431 :
432 : /*
433 : * Look up the language's call handler function, ignoring any attributes
434 : * that would normally cause insertion of fmgr_security_definer. We need
435 : * to get back a bare pointer to the actual C-language function.
436 : */
437 34316 : fmgr_info_cxt_security(languageStruct->lanplcallfoid, &plfinfo,
438 : CurrentMemoryContext, true);
439 34316 : finfo->fn_addr = plfinfo.fn_addr;
440 :
441 34316 : ReleaseSysCache(languageTuple);
442 34316 : }
443 :
444 : /*
445 : * Fetch and validate the information record for the given external function.
446 : * The function is specified by a handle for the containing library
447 : * (obtained from load_external_function) as well as the function name.
448 : *
449 : * If no info function exists for the given name an error is raised.
450 : *
451 : * This function is broken out of fmgr_info_C_lang so that fmgr_c_validator
452 : * can validate the information record for a function not yet entered into
453 : * pg_proc.
454 : */
455 : const Pg_finfo_record *
456 14502 : fetch_finfo_record(void *filehandle, const char *funcname)
457 : {
458 : char *infofuncname;
459 : PGFInfoFunction infofunc;
460 : const Pg_finfo_record *inforec;
461 :
462 14502 : infofuncname = psprintf("pg_finfo_%s", funcname);
463 :
464 : /* Try to look up the info function */
465 14502 : infofunc = (PGFInfoFunction) lookup_external_function(filehandle,
466 : infofuncname);
467 14502 : if (infofunc == NULL)
468 : {
469 0 : ereport(ERROR,
470 : (errcode(ERRCODE_UNDEFINED_FUNCTION),
471 : errmsg("could not find function information for function \"%s\"",
472 : funcname),
473 : errhint("SQL-callable functions need an accompanying PG_FUNCTION_INFO_V1(funcname).")));
474 : return NULL; /* silence compiler */
475 : }
476 :
477 : /* Found, so call it */
478 14502 : inforec = (*infofunc) ();
479 :
480 : /* Validate result as best we can */
481 14502 : if (inforec == NULL)
482 0 : elog(ERROR, "null result from info function \"%s\"", infofuncname);
483 14502 : switch (inforec->api_version)
484 : {
485 14502 : case 1:
486 : /* OK, no additional fields to validate */
487 14502 : break;
488 0 : default:
489 0 : ereport(ERROR,
490 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
491 : errmsg("unrecognized API version %d reported by info function \"%s\"",
492 : inforec->api_version, infofuncname)));
493 : break;
494 : }
495 :
496 14502 : pfree(infofuncname);
497 14502 : return inforec;
498 : }
499 :
500 :
501 : /*-------------------------------------------------------------------------
502 : * Routines for caching lookup information for external C functions.
503 : *
504 : * The routines in dfmgr.c are relatively slow, so we try to avoid running
505 : * them more than once per external function per session. We use a hash table
506 : * with the function OID as the lookup key.
507 : *-------------------------------------------------------------------------
508 : */
509 :
510 : /*
511 : * lookup_C_func: try to find a C function in the hash table
512 : *
513 : * If an entry exists and is up to date, return it; else return NULL
514 : */
515 : static CFuncHashTabEntry *
516 101168 : lookup_C_func(HeapTuple procedureTuple)
517 : {
518 101168 : Oid fn_oid = ((Form_pg_proc) GETSTRUCT(procedureTuple))->oid;
519 : CFuncHashTabEntry *entry;
520 :
521 101168 : if (CFuncHash == NULL)
522 3452 : return NULL; /* no table yet */
523 : entry = (CFuncHashTabEntry *)
524 97716 : hash_search(CFuncHash,
525 : &fn_oid,
526 : HASH_FIND,
527 : NULL);
528 97716 : if (entry == NULL)
529 4010 : return NULL; /* no such entry */
530 187408 : if (entry->fn_xmin == HeapTupleHeaderGetRawXmin(procedureTuple->t_data) &&
531 93702 : ItemPointerEquals(&entry->fn_tid, &procedureTuple->t_self))
532 93702 : return entry; /* OK */
533 4 : return NULL; /* entry is out of date */
534 : }
535 :
536 : /*
537 : * record_C_func: enter (or update) info about a C function in the hash table
538 : */
539 : static void
540 7466 : record_C_func(HeapTuple procedureTuple,
541 : PGFunction user_fn, const Pg_finfo_record *inforec)
542 : {
543 7466 : Oid fn_oid = ((Form_pg_proc) GETSTRUCT(procedureTuple))->oid;
544 : CFuncHashTabEntry *entry;
545 : bool found;
546 :
547 : /* Create the hash table if it doesn't exist yet */
548 7466 : if (CFuncHash == NULL)
549 : {
550 : HASHCTL hash_ctl;
551 :
552 3452 : hash_ctl.keysize = sizeof(Oid);
553 3452 : hash_ctl.entrysize = sizeof(CFuncHashTabEntry);
554 3452 : CFuncHash = hash_create("CFuncHash",
555 : 100,
556 : &hash_ctl,
557 : HASH_ELEM | HASH_BLOBS);
558 : }
559 :
560 : entry = (CFuncHashTabEntry *)
561 7466 : hash_search(CFuncHash,
562 : &fn_oid,
563 : HASH_ENTER,
564 : &found);
565 : /* OID is already filled in */
566 7466 : entry->fn_xmin = HeapTupleHeaderGetRawXmin(procedureTuple->t_data);
567 7466 : entry->fn_tid = procedureTuple->t_self;
568 7466 : entry->user_fn = user_fn;
569 7466 : entry->inforec = inforec;
570 7466 : }
571 :
572 :
573 : /*
574 : * Copy an FmgrInfo struct
575 : *
576 : * This is inherently somewhat bogus since we can't reliably duplicate
577 : * language-dependent subsidiary info. We cheat by zeroing fn_extra,
578 : * instead, meaning that subsidiary info will have to be recomputed.
579 : */
580 : void
581 47306298 : fmgr_info_copy(FmgrInfo *dstinfo, FmgrInfo *srcinfo,
582 : MemoryContext destcxt)
583 : {
584 47306298 : memcpy(dstinfo, srcinfo, sizeof(FmgrInfo));
585 47306298 : dstinfo->fn_mcxt = destcxt;
586 47306298 : dstinfo->fn_extra = NULL;
587 47306298 : }
588 :
589 :
590 : /*
591 : * Specialized lookup routine for fmgr_internal_validator: given the alleged
592 : * name of an internal function, return the OID of the function.
593 : * If the name is not recognized, return InvalidOid.
594 : */
595 : Oid
596 5128 : fmgr_internal_function(const char *proname)
597 : {
598 5128 : const FmgrBuiltin *fbp = fmgr_lookupByName(proname);
599 :
600 5128 : if (fbp == NULL)
601 6 : return InvalidOid;
602 5122 : return fbp->foid;
603 : }
604 :
605 :
606 : /*
607 : * Support for security-definer and proconfig-using functions. We support
608 : * both of these features using the same call handler, because they are
609 : * often used together and it would be inefficient (as well as notationally
610 : * messy) to have two levels of call handler involved.
611 : */
612 : struct fmgr_security_definer_cache
613 : {
614 : FmgrInfo flinfo; /* lookup info for target function */
615 : Oid userid; /* userid to set, or InvalidOid */
616 : List *configNames; /* GUC names to set, or NIL */
617 : List *configHandles; /* GUC handles to set, or NIL */
618 : List *configValues; /* GUC values to set, or NIL */
619 : Datum arg; /* passthrough argument for plugin modules */
620 : };
621 :
622 : /*
623 : * Function handler for security-definer/proconfig/plugin-hooked functions.
624 : * We extract the OID of the actual function and do a fmgr lookup again.
625 : * Then we fetch the pg_proc row and copy the owner ID and proconfig fields.
626 : * (All this info is cached for the duration of the current query.)
627 : * To execute a call, we temporarily replace the flinfo with the cached
628 : * and looked-up one, while keeping the outer fcinfo (which contains all
629 : * the actual arguments, etc.) intact. This is not re-entrant, but then
630 : * the fcinfo itself can't be used reentrantly anyway.
631 : */
632 : extern Datum
633 464 : fmgr_security_definer(PG_FUNCTION_ARGS)
634 : {
635 : Datum result;
636 : struct fmgr_security_definer_cache *volatile fcache;
637 : FmgrInfo *save_flinfo;
638 : Oid save_userid;
639 : int save_sec_context;
640 : ListCell *lc1,
641 : *lc2,
642 : *lc3;
643 : int save_nestlevel;
644 : PgStat_FunctionCallUsage fcusage;
645 :
646 464 : if (!fcinfo->flinfo->fn_extra)
647 : {
648 : HeapTuple tuple;
649 : Form_pg_proc procedureStruct;
650 : Datum datum;
651 : bool isnull;
652 : MemoryContext oldcxt;
653 :
654 410 : fcache = MemoryContextAllocZero(fcinfo->flinfo->fn_mcxt,
655 : sizeof(*fcache));
656 :
657 410 : fmgr_info_cxt_security(fcinfo->flinfo->fn_oid, &fcache->flinfo,
658 410 : fcinfo->flinfo->fn_mcxt, true);
659 410 : fcache->flinfo.fn_expr = fcinfo->flinfo->fn_expr;
660 :
661 410 : tuple = SearchSysCache1(PROCOID,
662 410 : ObjectIdGetDatum(fcinfo->flinfo->fn_oid));
663 410 : if (!HeapTupleIsValid(tuple))
664 0 : elog(ERROR, "cache lookup failed for function %u",
665 : fcinfo->flinfo->fn_oid);
666 410 : procedureStruct = (Form_pg_proc) GETSTRUCT(tuple);
667 :
668 410 : if (procedureStruct->prosecdef)
669 284 : fcache->userid = procedureStruct->proowner;
670 :
671 410 : datum = SysCacheGetAttr(PROCOID, tuple, Anum_pg_proc_proconfig,
672 : &isnull);
673 410 : if (!isnull)
674 : {
675 : ArrayType *array;
676 : ListCell *lc;
677 :
678 132 : oldcxt = MemoryContextSwitchTo(fcinfo->flinfo->fn_mcxt);
679 132 : array = DatumGetArrayTypeP(datum);
680 132 : TransformGUCArray(array, &fcache->configNames,
681 132 : &fcache->configValues);
682 :
683 : /* transform names to config handles to avoid lookup cost */
684 132 : fcache->configHandles = NIL;
685 264 : foreach(lc, fcache->configNames)
686 : {
687 132 : char *name = (char *) lfirst(lc);
688 :
689 132 : fcache->configHandles = lappend(fcache->configHandles,
690 132 : get_config_handle(name));
691 : }
692 :
693 132 : MemoryContextSwitchTo(oldcxt);
694 : }
695 :
696 410 : ReleaseSysCache(tuple);
697 :
698 410 : fcinfo->flinfo->fn_extra = fcache;
699 : }
700 : else
701 54 : fcache = fcinfo->flinfo->fn_extra;
702 :
703 : /* GetUserIdAndSecContext is cheap enough that no harm in a wasted call */
704 464 : GetUserIdAndSecContext(&save_userid, &save_sec_context);
705 464 : if (fcache->configNames != NIL) /* Need a new GUC nesting level */
706 186 : save_nestlevel = NewGUCNestLevel();
707 : else
708 278 : save_nestlevel = 0; /* keep compiler quiet */
709 :
710 464 : if (OidIsValid(fcache->userid))
711 338 : SetUserIdAndSecContext(fcache->userid,
712 : save_sec_context | SECURITY_LOCAL_USERID_CHANGE);
713 :
714 644 : forthree(lc1, fcache->configNames,
715 : lc2, fcache->configHandles,
716 : lc3, fcache->configValues)
717 : {
718 186 : GucContext context = superuser() ? PGC_SUSET : PGC_USERSET;
719 186 : GucSource source = PGC_S_SESSION;
720 186 : GucAction action = GUC_ACTION_SAVE;
721 186 : char *name = lfirst(lc1);
722 186 : config_handle *handle = lfirst(lc2);
723 186 : char *value = lfirst(lc3);
724 :
725 186 : (void) set_config_with_handle(name, handle, value,
726 : context, source, GetUserId(),
727 : action, true, 0, false);
728 : }
729 :
730 : /* function manager hook */
731 458 : if (fmgr_hook)
732 0 : (*fmgr_hook) (FHET_START, &fcache->flinfo, &fcache->arg);
733 :
734 : /*
735 : * We don't need to restore GUC or userid settings on error, because the
736 : * ensuing xact or subxact abort will do that. The PG_TRY block is only
737 : * needed to clean up the flinfo link.
738 : */
739 458 : save_flinfo = fcinfo->flinfo;
740 :
741 458 : PG_TRY();
742 : {
743 458 : fcinfo->flinfo = &fcache->flinfo;
744 :
745 : /* See notes in fmgr_info_cxt_security */
746 458 : pgstat_init_function_usage(fcinfo, &fcusage);
747 :
748 458 : result = FunctionCallInvoke(fcinfo);
749 :
750 : /*
751 : * We could be calling either a regular or a set-returning function,
752 : * so we have to test to see what finalize flag to use.
753 : */
754 436 : pgstat_end_function_usage(&fcusage,
755 452 : (fcinfo->resultinfo == NULL ||
756 452 : !IsA(fcinfo->resultinfo, ReturnSetInfo) ||
757 16 : ((ReturnSetInfo *) fcinfo->resultinfo)->isDone != ExprMultipleResult));
758 : }
759 22 : PG_CATCH();
760 : {
761 22 : fcinfo->flinfo = save_flinfo;
762 22 : if (fmgr_hook)
763 0 : (*fmgr_hook) (FHET_ABORT, &fcache->flinfo, &fcache->arg);
764 22 : PG_RE_THROW();
765 : }
766 436 : PG_END_TRY();
767 :
768 436 : fcinfo->flinfo = save_flinfo;
769 :
770 436 : if (fcache->configNames != NIL)
771 160 : AtEOXact_GUC(true, save_nestlevel);
772 436 : if (OidIsValid(fcache->userid))
773 336 : SetUserIdAndSecContext(save_userid, save_sec_context);
774 436 : if (fmgr_hook)
775 0 : (*fmgr_hook) (FHET_END, &fcache->flinfo, &fcache->arg);
776 :
777 436 : return result;
778 : }
779 :
780 :
781 : /*-------------------------------------------------------------------------
782 : * Support routines for callers of fmgr-compatible functions
783 : *-------------------------------------------------------------------------
784 : */
785 :
786 : /*
787 : * These are for invocation of a specifically named function with a
788 : * directly-computed parameter list. Note that neither arguments nor result
789 : * are allowed to be NULL. Also, the function cannot be one that needs to
790 : * look at FmgrInfo, since there won't be any.
791 : */
792 : Datum
793 2904002 : DirectFunctionCall1Coll(PGFunction func, Oid collation, Datum arg1)
794 : {
795 2904002 : LOCAL_FCINFO(fcinfo, 1);
796 : Datum result;
797 :
798 2904002 : InitFunctionCallInfoData(*fcinfo, NULL, 1, collation, NULL, NULL);
799 :
800 2904002 : fcinfo->args[0].value = arg1;
801 2904002 : fcinfo->args[0].isnull = false;
802 :
803 2904002 : result = (*func) (fcinfo);
804 :
805 : /* Check for null result, since caller is clearly not expecting one */
806 2903948 : if (fcinfo->isnull)
807 0 : elog(ERROR, "function %p returned NULL", (void *) func);
808 :
809 2903948 : return result;
810 : }
811 :
812 : Datum
813 35074366 : DirectFunctionCall2Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2)
814 : {
815 35074366 : LOCAL_FCINFO(fcinfo, 2);
816 : Datum result;
817 :
818 35074366 : InitFunctionCallInfoData(*fcinfo, NULL, 2, collation, NULL, NULL);
819 :
820 35074366 : fcinfo->args[0].value = arg1;
821 35074366 : fcinfo->args[0].isnull = false;
822 35074366 : fcinfo->args[1].value = arg2;
823 35074366 : fcinfo->args[1].isnull = false;
824 :
825 35074366 : result = (*func) (fcinfo);
826 :
827 : /* Check for null result, since caller is clearly not expecting one */
828 35074276 : if (fcinfo->isnull)
829 0 : elog(ERROR, "function %p returned NULL", (void *) func);
830 :
831 35074276 : return result;
832 : }
833 :
834 : Datum
835 135684 : DirectFunctionCall3Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2,
836 : Datum arg3)
837 : {
838 135684 : LOCAL_FCINFO(fcinfo, 3);
839 : Datum result;
840 :
841 135684 : InitFunctionCallInfoData(*fcinfo, NULL, 3, collation, NULL, NULL);
842 :
843 135684 : fcinfo->args[0].value = arg1;
844 135684 : fcinfo->args[0].isnull = false;
845 135684 : fcinfo->args[1].value = arg2;
846 135684 : fcinfo->args[1].isnull = false;
847 135684 : fcinfo->args[2].value = arg3;
848 135684 : fcinfo->args[2].isnull = false;
849 :
850 135684 : result = (*func) (fcinfo);
851 :
852 : /* Check for null result, since caller is clearly not expecting one */
853 135640 : if (fcinfo->isnull)
854 0 : elog(ERROR, "function %p returned NULL", (void *) func);
855 :
856 135640 : return result;
857 : }
858 :
859 : Datum
860 1244 : DirectFunctionCall4Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2,
861 : Datum arg3, Datum arg4)
862 : {
863 1244 : LOCAL_FCINFO(fcinfo, 4);
864 : Datum result;
865 :
866 1244 : InitFunctionCallInfoData(*fcinfo, NULL, 4, collation, NULL, NULL);
867 :
868 1244 : fcinfo->args[0].value = arg1;
869 1244 : fcinfo->args[0].isnull = false;
870 1244 : fcinfo->args[1].value = arg2;
871 1244 : fcinfo->args[1].isnull = false;
872 1244 : fcinfo->args[2].value = arg3;
873 1244 : fcinfo->args[2].isnull = false;
874 1244 : fcinfo->args[3].value = arg4;
875 1244 : fcinfo->args[3].isnull = false;
876 :
877 1244 : result = (*func) (fcinfo);
878 :
879 : /* Check for null result, since caller is clearly not expecting one */
880 1244 : if (fcinfo->isnull)
881 0 : elog(ERROR, "function %p returned NULL", (void *) func);
882 :
883 1244 : return result;
884 : }
885 :
886 : Datum
887 4840 : DirectFunctionCall5Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2,
888 : Datum arg3, Datum arg4, Datum arg5)
889 : {
890 4840 : LOCAL_FCINFO(fcinfo, 5);
891 : Datum result;
892 :
893 4840 : InitFunctionCallInfoData(*fcinfo, NULL, 5, collation, NULL, NULL);
894 :
895 4840 : fcinfo->args[0].value = arg1;
896 4840 : fcinfo->args[0].isnull = false;
897 4840 : fcinfo->args[1].value = arg2;
898 4840 : fcinfo->args[1].isnull = false;
899 4840 : fcinfo->args[2].value = arg3;
900 4840 : fcinfo->args[2].isnull = false;
901 4840 : fcinfo->args[3].value = arg4;
902 4840 : fcinfo->args[3].isnull = false;
903 4840 : fcinfo->args[4].value = arg5;
904 4840 : fcinfo->args[4].isnull = false;
905 :
906 4840 : result = (*func) (fcinfo);
907 :
908 : /* Check for null result, since caller is clearly not expecting one */
909 4834 : if (fcinfo->isnull)
910 0 : elog(ERROR, "function %p returned NULL", (void *) func);
911 :
912 4834 : return result;
913 : }
914 :
915 : Datum
916 0 : DirectFunctionCall6Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2,
917 : Datum arg3, Datum arg4, Datum arg5,
918 : Datum arg6)
919 : {
920 0 : LOCAL_FCINFO(fcinfo, 6);
921 : Datum result;
922 :
923 0 : InitFunctionCallInfoData(*fcinfo, NULL, 6, collation, NULL, NULL);
924 :
925 0 : fcinfo->args[0].value = arg1;
926 0 : fcinfo->args[0].isnull = false;
927 0 : fcinfo->args[1].value = arg2;
928 0 : fcinfo->args[1].isnull = false;
929 0 : fcinfo->args[2].value = arg3;
930 0 : fcinfo->args[2].isnull = false;
931 0 : fcinfo->args[3].value = arg4;
932 0 : fcinfo->args[3].isnull = false;
933 0 : fcinfo->args[4].value = arg5;
934 0 : fcinfo->args[4].isnull = false;
935 0 : fcinfo->args[5].value = arg6;
936 0 : fcinfo->args[5].isnull = false;
937 :
938 0 : result = (*func) (fcinfo);
939 :
940 : /* Check for null result, since caller is clearly not expecting one */
941 0 : if (fcinfo->isnull)
942 0 : elog(ERROR, "function %p returned NULL", (void *) func);
943 :
944 0 : return result;
945 : }
946 :
947 : Datum
948 0 : DirectFunctionCall7Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2,
949 : Datum arg3, Datum arg4, Datum arg5,
950 : Datum arg6, Datum arg7)
951 : {
952 0 : LOCAL_FCINFO(fcinfo, 7);
953 : Datum result;
954 :
955 0 : InitFunctionCallInfoData(*fcinfo, NULL, 7, collation, NULL, NULL);
956 :
957 0 : fcinfo->args[0].value = arg1;
958 0 : fcinfo->args[0].isnull = false;
959 0 : fcinfo->args[1].value = arg2;
960 0 : fcinfo->args[1].isnull = false;
961 0 : fcinfo->args[2].value = arg3;
962 0 : fcinfo->args[2].isnull = false;
963 0 : fcinfo->args[3].value = arg4;
964 0 : fcinfo->args[3].isnull = false;
965 0 : fcinfo->args[4].value = arg5;
966 0 : fcinfo->args[4].isnull = false;
967 0 : fcinfo->args[5].value = arg6;
968 0 : fcinfo->args[5].isnull = false;
969 0 : fcinfo->args[6].value = arg7;
970 0 : fcinfo->args[6].isnull = false;
971 :
972 0 : result = (*func) (fcinfo);
973 :
974 : /* Check for null result, since caller is clearly not expecting one */
975 0 : if (fcinfo->isnull)
976 0 : elog(ERROR, "function %p returned NULL", (void *) func);
977 :
978 0 : return result;
979 : }
980 :
981 : Datum
982 0 : DirectFunctionCall8Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2,
983 : Datum arg3, Datum arg4, Datum arg5,
984 : Datum arg6, Datum arg7, Datum arg8)
985 : {
986 0 : LOCAL_FCINFO(fcinfo, 8);
987 : Datum result;
988 :
989 0 : InitFunctionCallInfoData(*fcinfo, NULL, 8, collation, NULL, NULL);
990 :
991 0 : fcinfo->args[0].value = arg1;
992 0 : fcinfo->args[0].isnull = false;
993 0 : fcinfo->args[1].value = arg2;
994 0 : fcinfo->args[1].isnull = false;
995 0 : fcinfo->args[2].value = arg3;
996 0 : fcinfo->args[2].isnull = false;
997 0 : fcinfo->args[3].value = arg4;
998 0 : fcinfo->args[3].isnull = false;
999 0 : fcinfo->args[4].value = arg5;
1000 0 : fcinfo->args[4].isnull = false;
1001 0 : fcinfo->args[5].value = arg6;
1002 0 : fcinfo->args[5].isnull = false;
1003 0 : fcinfo->args[6].value = arg7;
1004 0 : fcinfo->args[6].isnull = false;
1005 0 : fcinfo->args[7].value = arg8;
1006 0 : fcinfo->args[7].isnull = false;
1007 :
1008 0 : result = (*func) (fcinfo);
1009 :
1010 : /* Check for null result, since caller is clearly not expecting one */
1011 0 : if (fcinfo->isnull)
1012 0 : elog(ERROR, "function %p returned NULL", (void *) func);
1013 :
1014 0 : return result;
1015 : }
1016 :
1017 : Datum
1018 0 : DirectFunctionCall9Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2,
1019 : Datum arg3, Datum arg4, Datum arg5,
1020 : Datum arg6, Datum arg7, Datum arg8,
1021 : Datum arg9)
1022 : {
1023 0 : LOCAL_FCINFO(fcinfo, 9);
1024 : Datum result;
1025 :
1026 0 : InitFunctionCallInfoData(*fcinfo, NULL, 9, collation, NULL, NULL);
1027 :
1028 0 : fcinfo->args[0].value = arg1;
1029 0 : fcinfo->args[0].isnull = false;
1030 0 : fcinfo->args[1].value = arg2;
1031 0 : fcinfo->args[1].isnull = false;
1032 0 : fcinfo->args[2].value = arg3;
1033 0 : fcinfo->args[2].isnull = false;
1034 0 : fcinfo->args[3].value = arg4;
1035 0 : fcinfo->args[3].isnull = false;
1036 0 : fcinfo->args[4].value = arg5;
1037 0 : fcinfo->args[4].isnull = false;
1038 0 : fcinfo->args[5].value = arg6;
1039 0 : fcinfo->args[5].isnull = false;
1040 0 : fcinfo->args[6].value = arg7;
1041 0 : fcinfo->args[6].isnull = false;
1042 0 : fcinfo->args[7].value = arg8;
1043 0 : fcinfo->args[7].isnull = false;
1044 0 : fcinfo->args[8].value = arg9;
1045 0 : fcinfo->args[8].isnull = false;
1046 :
1047 0 : result = (*func) (fcinfo);
1048 :
1049 : /* Check for null result, since caller is clearly not expecting one */
1050 0 : if (fcinfo->isnull)
1051 0 : elog(ERROR, "function %p returned NULL", (void *) func);
1052 :
1053 0 : return result;
1054 : }
1055 :
1056 : /*
1057 : * These functions work like the DirectFunctionCall functions except that
1058 : * they use the flinfo parameter to initialise the fcinfo for the call.
1059 : * It's recommended that the callee only use the fn_extra and fn_mcxt
1060 : * fields, as other fields will typically describe the calling function
1061 : * not the callee. Conversely, the calling function should not have
1062 : * used fn_extra, unless its use is known to be compatible with the callee's.
1063 : */
1064 :
1065 : Datum
1066 0 : CallerFInfoFunctionCall1(PGFunction func, FmgrInfo *flinfo, Oid collation, Datum arg1)
1067 : {
1068 0 : LOCAL_FCINFO(fcinfo, 1);
1069 : Datum result;
1070 :
1071 0 : InitFunctionCallInfoData(*fcinfo, flinfo, 1, collation, NULL, NULL);
1072 :
1073 0 : fcinfo->args[0].value = arg1;
1074 0 : fcinfo->args[0].isnull = false;
1075 :
1076 0 : result = (*func) (fcinfo);
1077 :
1078 : /* Check for null result, since caller is clearly not expecting one */
1079 0 : if (fcinfo->isnull)
1080 0 : elog(ERROR, "function %p returned NULL", (void *) func);
1081 :
1082 0 : return result;
1083 : }
1084 :
1085 : Datum
1086 420672 : CallerFInfoFunctionCall2(PGFunction func, FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2)
1087 : {
1088 420672 : LOCAL_FCINFO(fcinfo, 2);
1089 : Datum result;
1090 :
1091 420672 : InitFunctionCallInfoData(*fcinfo, flinfo, 2, collation, NULL, NULL);
1092 :
1093 420672 : fcinfo->args[0].value = arg1;
1094 420672 : fcinfo->args[0].isnull = false;
1095 420672 : fcinfo->args[1].value = arg2;
1096 420672 : fcinfo->args[1].isnull = false;
1097 :
1098 420672 : result = (*func) (fcinfo);
1099 :
1100 : /* Check for null result, since caller is clearly not expecting one */
1101 420672 : if (fcinfo->isnull)
1102 0 : elog(ERROR, "function %p returned NULL", (void *) func);
1103 :
1104 420672 : return result;
1105 : }
1106 :
1107 : /*
1108 : * These are for invocation of a previously-looked-up function with a
1109 : * directly-computed parameter list. Note that neither arguments nor result
1110 : * are allowed to be NULL.
1111 : */
1112 : Datum
1113 6114820 : FunctionCall0Coll(FmgrInfo *flinfo, Oid collation)
1114 : {
1115 6114820 : LOCAL_FCINFO(fcinfo, 0);
1116 : Datum result;
1117 :
1118 6114820 : InitFunctionCallInfoData(*fcinfo, flinfo, 0, collation, NULL, NULL);
1119 :
1120 6114820 : result = FunctionCallInvoke(fcinfo);
1121 :
1122 : /* Check for null result, since caller is clearly not expecting one */
1123 6114820 : if (fcinfo->isnull)
1124 0 : elog(ERROR, "function %u returned NULL", flinfo->fn_oid);
1125 :
1126 6114820 : return result;
1127 : }
1128 :
1129 : Datum
1130 62135622 : FunctionCall1Coll(FmgrInfo *flinfo, Oid collation, Datum arg1)
1131 : {
1132 62135622 : LOCAL_FCINFO(fcinfo, 1);
1133 : Datum result;
1134 :
1135 62135622 : InitFunctionCallInfoData(*fcinfo, flinfo, 1, collation, NULL, NULL);
1136 :
1137 62135622 : fcinfo->args[0].value = arg1;
1138 62135622 : fcinfo->args[0].isnull = false;
1139 :
1140 62135622 : result = FunctionCallInvoke(fcinfo);
1141 :
1142 : /* Check for null result, since caller is clearly not expecting one */
1143 62134962 : if (fcinfo->isnull)
1144 0 : elog(ERROR, "function %u returned NULL", flinfo->fn_oid);
1145 :
1146 62134962 : return result;
1147 : }
1148 :
1149 : Datum
1150 569228672 : FunctionCall2Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2)
1151 : {
1152 569228672 : LOCAL_FCINFO(fcinfo, 2);
1153 : Datum result;
1154 :
1155 569228672 : InitFunctionCallInfoData(*fcinfo, flinfo, 2, collation, NULL, NULL);
1156 :
1157 569228672 : fcinfo->args[0].value = arg1;
1158 569228672 : fcinfo->args[0].isnull = false;
1159 569228672 : fcinfo->args[1].value = arg2;
1160 569228672 : fcinfo->args[1].isnull = false;
1161 :
1162 569228672 : result = FunctionCallInvoke(fcinfo);
1163 :
1164 : /* Check for null result, since caller is clearly not expecting one */
1165 569228510 : if (fcinfo->isnull)
1166 0 : elog(ERROR, "function %u returned NULL", flinfo->fn_oid);
1167 :
1168 569228510 : return result;
1169 : }
1170 :
1171 : Datum
1172 47733636 : FunctionCall3Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2,
1173 : Datum arg3)
1174 : {
1175 47733636 : LOCAL_FCINFO(fcinfo, 3);
1176 : Datum result;
1177 :
1178 47733636 : InitFunctionCallInfoData(*fcinfo, flinfo, 3, collation, NULL, NULL);
1179 :
1180 47733636 : fcinfo->args[0].value = arg1;
1181 47733636 : fcinfo->args[0].isnull = false;
1182 47733636 : fcinfo->args[1].value = arg2;
1183 47733636 : fcinfo->args[1].isnull = false;
1184 47733636 : fcinfo->args[2].value = arg3;
1185 47733636 : fcinfo->args[2].isnull = false;
1186 :
1187 47733636 : result = FunctionCallInvoke(fcinfo);
1188 :
1189 : /* Check for null result, since caller is clearly not expecting one */
1190 47733636 : if (fcinfo->isnull)
1191 0 : elog(ERROR, "function %u returned NULL", flinfo->fn_oid);
1192 :
1193 47733636 : return result;
1194 : }
1195 :
1196 : Datum
1197 1909950 : FunctionCall4Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2,
1198 : Datum arg3, Datum arg4)
1199 : {
1200 1909950 : LOCAL_FCINFO(fcinfo, 4);
1201 : Datum result;
1202 :
1203 1909950 : InitFunctionCallInfoData(*fcinfo, flinfo, 4, collation, NULL, NULL);
1204 :
1205 1909950 : fcinfo->args[0].value = arg1;
1206 1909950 : fcinfo->args[0].isnull = false;
1207 1909950 : fcinfo->args[1].value = arg2;
1208 1909950 : fcinfo->args[1].isnull = false;
1209 1909950 : fcinfo->args[2].value = arg3;
1210 1909950 : fcinfo->args[2].isnull = false;
1211 1909950 : fcinfo->args[3].value = arg4;
1212 1909950 : fcinfo->args[3].isnull = false;
1213 :
1214 1909950 : result = FunctionCallInvoke(fcinfo);
1215 :
1216 : /* Check for null result, since caller is clearly not expecting one */
1217 1909920 : if (fcinfo->isnull)
1218 0 : elog(ERROR, "function %u returned NULL", flinfo->fn_oid);
1219 :
1220 1909920 : return result;
1221 : }
1222 :
1223 : Datum
1224 2298476 : FunctionCall5Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2,
1225 : Datum arg3, Datum arg4, Datum arg5)
1226 : {
1227 2298476 : LOCAL_FCINFO(fcinfo, 5);
1228 : Datum result;
1229 :
1230 2298476 : InitFunctionCallInfoData(*fcinfo, flinfo, 5, collation, NULL, NULL);
1231 :
1232 2298476 : fcinfo->args[0].value = arg1;
1233 2298476 : fcinfo->args[0].isnull = false;
1234 2298476 : fcinfo->args[1].value = arg2;
1235 2298476 : fcinfo->args[1].isnull = false;
1236 2298476 : fcinfo->args[2].value = arg3;
1237 2298476 : fcinfo->args[2].isnull = false;
1238 2298476 : fcinfo->args[3].value = arg4;
1239 2298476 : fcinfo->args[3].isnull = false;
1240 2298476 : fcinfo->args[4].value = arg5;
1241 2298476 : fcinfo->args[4].isnull = false;
1242 :
1243 2298476 : result = FunctionCallInvoke(fcinfo);
1244 :
1245 : /* Check for null result, since caller is clearly not expecting one */
1246 2298380 : if (fcinfo->isnull)
1247 0 : elog(ERROR, "function %u returned NULL", flinfo->fn_oid);
1248 :
1249 2298380 : return result;
1250 : }
1251 :
1252 : Datum
1253 7084 : FunctionCall6Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2,
1254 : Datum arg3, Datum arg4, Datum arg5,
1255 : Datum arg6)
1256 : {
1257 7084 : LOCAL_FCINFO(fcinfo, 6);
1258 : Datum result;
1259 :
1260 7084 : InitFunctionCallInfoData(*fcinfo, flinfo, 6, collation, NULL, NULL);
1261 :
1262 7084 : fcinfo->args[0].value = arg1;
1263 7084 : fcinfo->args[0].isnull = false;
1264 7084 : fcinfo->args[1].value = arg2;
1265 7084 : fcinfo->args[1].isnull = false;
1266 7084 : fcinfo->args[2].value = arg3;
1267 7084 : fcinfo->args[2].isnull = false;
1268 7084 : fcinfo->args[3].value = arg4;
1269 7084 : fcinfo->args[3].isnull = false;
1270 7084 : fcinfo->args[4].value = arg5;
1271 7084 : fcinfo->args[4].isnull = false;
1272 7084 : fcinfo->args[5].value = arg6;
1273 7084 : fcinfo->args[5].isnull = false;
1274 :
1275 7084 : result = FunctionCallInvoke(fcinfo);
1276 :
1277 : /* Check for null result, since caller is clearly not expecting one */
1278 4714 : if (fcinfo->isnull)
1279 0 : elog(ERROR, "function %u returned NULL", flinfo->fn_oid);
1280 :
1281 4714 : return result;
1282 : }
1283 :
1284 : Datum
1285 977494 : FunctionCall7Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2,
1286 : Datum arg3, Datum arg4, Datum arg5,
1287 : Datum arg6, Datum arg7)
1288 : {
1289 977494 : LOCAL_FCINFO(fcinfo, 7);
1290 : Datum result;
1291 :
1292 977494 : InitFunctionCallInfoData(*fcinfo, flinfo, 7, collation, NULL, NULL);
1293 :
1294 977494 : fcinfo->args[0].value = arg1;
1295 977494 : fcinfo->args[0].isnull = false;
1296 977494 : fcinfo->args[1].value = arg2;
1297 977494 : fcinfo->args[1].isnull = false;
1298 977494 : fcinfo->args[2].value = arg3;
1299 977494 : fcinfo->args[2].isnull = false;
1300 977494 : fcinfo->args[3].value = arg4;
1301 977494 : fcinfo->args[3].isnull = false;
1302 977494 : fcinfo->args[4].value = arg5;
1303 977494 : fcinfo->args[4].isnull = false;
1304 977494 : fcinfo->args[5].value = arg6;
1305 977494 : fcinfo->args[5].isnull = false;
1306 977494 : fcinfo->args[6].value = arg7;
1307 977494 : fcinfo->args[6].isnull = false;
1308 :
1309 977494 : result = FunctionCallInvoke(fcinfo);
1310 :
1311 : /* Check for null result, since caller is clearly not expecting one */
1312 977494 : if (fcinfo->isnull)
1313 0 : elog(ERROR, "function %u returned NULL", flinfo->fn_oid);
1314 :
1315 977494 : return result;
1316 : }
1317 :
1318 : Datum
1319 38556 : FunctionCall8Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2,
1320 : Datum arg3, Datum arg4, Datum arg5,
1321 : Datum arg6, Datum arg7, Datum arg8)
1322 : {
1323 38556 : LOCAL_FCINFO(fcinfo, 8);
1324 : Datum result;
1325 :
1326 38556 : InitFunctionCallInfoData(*fcinfo, flinfo, 8, collation, NULL, NULL);
1327 :
1328 38556 : fcinfo->args[0].value = arg1;
1329 38556 : fcinfo->args[0].isnull = false;
1330 38556 : fcinfo->args[1].value = arg2;
1331 38556 : fcinfo->args[1].isnull = false;
1332 38556 : fcinfo->args[2].value = arg3;
1333 38556 : fcinfo->args[2].isnull = false;
1334 38556 : fcinfo->args[3].value = arg4;
1335 38556 : fcinfo->args[3].isnull = false;
1336 38556 : fcinfo->args[4].value = arg5;
1337 38556 : fcinfo->args[4].isnull = false;
1338 38556 : fcinfo->args[5].value = arg6;
1339 38556 : fcinfo->args[5].isnull = false;
1340 38556 : fcinfo->args[6].value = arg7;
1341 38556 : fcinfo->args[6].isnull = false;
1342 38556 : fcinfo->args[7].value = arg8;
1343 38556 : fcinfo->args[7].isnull = false;
1344 :
1345 38556 : result = FunctionCallInvoke(fcinfo);
1346 :
1347 : /* Check for null result, since caller is clearly not expecting one */
1348 38556 : if (fcinfo->isnull)
1349 0 : elog(ERROR, "function %u returned NULL", flinfo->fn_oid);
1350 :
1351 38556 : return result;
1352 : }
1353 :
1354 : Datum
1355 0 : FunctionCall9Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2,
1356 : Datum arg3, Datum arg4, Datum arg5,
1357 : Datum arg6, Datum arg7, Datum arg8,
1358 : Datum arg9)
1359 : {
1360 0 : LOCAL_FCINFO(fcinfo, 9);
1361 : Datum result;
1362 :
1363 0 : InitFunctionCallInfoData(*fcinfo, flinfo, 9, collation, NULL, NULL);
1364 :
1365 0 : fcinfo->args[0].value = arg1;
1366 0 : fcinfo->args[0].isnull = false;
1367 0 : fcinfo->args[1].value = arg2;
1368 0 : fcinfo->args[1].isnull = false;
1369 0 : fcinfo->args[2].value = arg3;
1370 0 : fcinfo->args[2].isnull = false;
1371 0 : fcinfo->args[3].value = arg4;
1372 0 : fcinfo->args[3].isnull = false;
1373 0 : fcinfo->args[4].value = arg5;
1374 0 : fcinfo->args[4].isnull = false;
1375 0 : fcinfo->args[5].value = arg6;
1376 0 : fcinfo->args[5].isnull = false;
1377 0 : fcinfo->args[6].value = arg7;
1378 0 : fcinfo->args[6].isnull = false;
1379 0 : fcinfo->args[7].value = arg8;
1380 0 : fcinfo->args[7].isnull = false;
1381 0 : fcinfo->args[8].value = arg9;
1382 0 : fcinfo->args[8].isnull = false;
1383 :
1384 0 : result = FunctionCallInvoke(fcinfo);
1385 :
1386 : /* Check for null result, since caller is clearly not expecting one */
1387 0 : if (fcinfo->isnull)
1388 0 : elog(ERROR, "function %u returned NULL", flinfo->fn_oid);
1389 :
1390 0 : return result;
1391 : }
1392 :
1393 :
1394 : /*
1395 : * These are for invocation of a function identified by OID with a
1396 : * directly-computed parameter list. Note that neither arguments nor result
1397 : * are allowed to be NULL. These are essentially fmgr_info() followed
1398 : * by FunctionCallN(). If the same function is to be invoked repeatedly,
1399 : * do the fmgr_info() once and then use FunctionCallN().
1400 : */
1401 : Datum
1402 6114820 : OidFunctionCall0Coll(Oid functionId, Oid collation)
1403 : {
1404 : FmgrInfo flinfo;
1405 :
1406 6114820 : fmgr_info(functionId, &flinfo);
1407 :
1408 6114820 : return FunctionCall0Coll(&flinfo, collation);
1409 : }
1410 :
1411 : Datum
1412 716948 : OidFunctionCall1Coll(Oid functionId, Oid collation, Datum arg1)
1413 : {
1414 : FmgrInfo flinfo;
1415 :
1416 716948 : fmgr_info(functionId, &flinfo);
1417 :
1418 716948 : return FunctionCall1Coll(&flinfo, collation, arg1);
1419 : }
1420 :
1421 : Datum
1422 1188 : OidFunctionCall2Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2)
1423 : {
1424 : FmgrInfo flinfo;
1425 :
1426 1188 : fmgr_info(functionId, &flinfo);
1427 :
1428 1188 : return FunctionCall2Coll(&flinfo, collation, arg1, arg2);
1429 : }
1430 :
1431 : Datum
1432 4 : OidFunctionCall3Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2,
1433 : Datum arg3)
1434 : {
1435 : FmgrInfo flinfo;
1436 :
1437 4 : fmgr_info(functionId, &flinfo);
1438 :
1439 4 : return FunctionCall3Coll(&flinfo, collation, arg1, arg2, arg3);
1440 : }
1441 :
1442 : Datum
1443 742590 : OidFunctionCall4Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2,
1444 : Datum arg3, Datum arg4)
1445 : {
1446 : FmgrInfo flinfo;
1447 :
1448 742590 : fmgr_info(functionId, &flinfo);
1449 :
1450 742590 : return FunctionCall4Coll(&flinfo, collation, arg1, arg2, arg3, arg4);
1451 : }
1452 :
1453 : Datum
1454 266884 : OidFunctionCall5Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2,
1455 : Datum arg3, Datum arg4, Datum arg5)
1456 : {
1457 : FmgrInfo flinfo;
1458 :
1459 266884 : fmgr_info(functionId, &flinfo);
1460 :
1461 266884 : return FunctionCall5Coll(&flinfo, collation, arg1, arg2, arg3, arg4, arg5);
1462 : }
1463 :
1464 : Datum
1465 6640 : OidFunctionCall6Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2,
1466 : Datum arg3, Datum arg4, Datum arg5,
1467 : Datum arg6)
1468 : {
1469 : FmgrInfo flinfo;
1470 :
1471 6640 : fmgr_info(functionId, &flinfo);
1472 :
1473 6640 : return FunctionCall6Coll(&flinfo, collation, arg1, arg2, arg3, arg4, arg5,
1474 : arg6);
1475 : }
1476 :
1477 : Datum
1478 0 : OidFunctionCall7Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2,
1479 : Datum arg3, Datum arg4, Datum arg5,
1480 : Datum arg6, Datum arg7)
1481 : {
1482 : FmgrInfo flinfo;
1483 :
1484 0 : fmgr_info(functionId, &flinfo);
1485 :
1486 0 : return FunctionCall7Coll(&flinfo, collation, arg1, arg2, arg3, arg4, arg5,
1487 : arg6, arg7);
1488 : }
1489 :
1490 : Datum
1491 0 : OidFunctionCall8Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2,
1492 : Datum arg3, Datum arg4, Datum arg5,
1493 : Datum arg6, Datum arg7, Datum arg8)
1494 : {
1495 : FmgrInfo flinfo;
1496 :
1497 0 : fmgr_info(functionId, &flinfo);
1498 :
1499 0 : return FunctionCall8Coll(&flinfo, collation, arg1, arg2, arg3, arg4, arg5,
1500 : arg6, arg7, arg8);
1501 : }
1502 :
1503 : Datum
1504 0 : OidFunctionCall9Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2,
1505 : Datum arg3, Datum arg4, Datum arg5,
1506 : Datum arg6, Datum arg7, Datum arg8,
1507 : Datum arg9)
1508 : {
1509 : FmgrInfo flinfo;
1510 :
1511 0 : fmgr_info(functionId, &flinfo);
1512 :
1513 0 : return FunctionCall9Coll(&flinfo, collation, arg1, arg2, arg3, arg4, arg5,
1514 : arg6, arg7, arg8, arg9);
1515 : }
1516 :
1517 :
1518 : /*
1519 : * Special cases for convenient invocation of datatype I/O functions.
1520 : */
1521 :
1522 : /*
1523 : * Call a previously-looked-up datatype input function.
1524 : *
1525 : * "str" may be NULL to indicate we are reading a NULL. In this case
1526 : * the caller should assume the result is NULL, but we'll call the input
1527 : * function anyway if it's not strict. So this is almost but not quite
1528 : * the same as FunctionCall3.
1529 : */
1530 : Datum
1531 38623186 : InputFunctionCall(FmgrInfo *flinfo, char *str, Oid typioparam, int32 typmod)
1532 : {
1533 38623186 : LOCAL_FCINFO(fcinfo, 3);
1534 : Datum result;
1535 :
1536 38623186 : if (str == NULL && flinfo->fn_strict)
1537 7726424 : return (Datum) 0; /* just return null result */
1538 :
1539 30896762 : InitFunctionCallInfoData(*fcinfo, flinfo, 3, InvalidOid, NULL, NULL);
1540 :
1541 30896762 : fcinfo->args[0].value = CStringGetDatum(str);
1542 30896762 : fcinfo->args[0].isnull = false;
1543 30896762 : fcinfo->args[1].value = ObjectIdGetDatum(typioparam);
1544 30896762 : fcinfo->args[1].isnull = false;
1545 30896762 : fcinfo->args[2].value = Int32GetDatum(typmod);
1546 30896762 : fcinfo->args[2].isnull = false;
1547 :
1548 30896762 : result = FunctionCallInvoke(fcinfo);
1549 :
1550 : /* Should get null result if and only if str is NULL */
1551 30892096 : if (str == NULL)
1552 : {
1553 0 : if (!fcinfo->isnull)
1554 0 : elog(ERROR, "input function %u returned non-NULL",
1555 : flinfo->fn_oid);
1556 : }
1557 : else
1558 : {
1559 30892096 : if (fcinfo->isnull)
1560 0 : elog(ERROR, "input function %u returned NULL",
1561 : flinfo->fn_oid);
1562 : }
1563 :
1564 30892096 : return result;
1565 : }
1566 :
1567 : /*
1568 : * Call a previously-looked-up datatype input function, with non-exception
1569 : * handling of "soft" errors.
1570 : *
1571 : * This is basically like InputFunctionCall, but the converted Datum is
1572 : * returned into *result while the function result is true for success or
1573 : * false for failure. Also, the caller may pass an ErrorSaveContext node.
1574 : *
1575 : * If escontext points to an ErrorSaveContext, any "soft" errors detected by
1576 : * the input function will be reported by filling the escontext struct and
1577 : * returning false. (The caller can choose to test SOFT_ERROR_OCCURRED(),
1578 : * but checking the function result instead is usually cheaper.)
1579 : *
1580 : * If escontext does not point to an ErrorSaveContext, errors are reported
1581 : * via ereport(ERROR), so that there is no functional difference from
1582 : * InputFunctionCall; the result will always be true if control returns.
1583 : */
1584 : bool
1585 6192800 : InputFunctionCallSafe(FmgrInfo *flinfo, char *str,
1586 : Oid typioparam, int32 typmod,
1587 : Node *escontext,
1588 : Datum *result)
1589 : {
1590 6192800 : LOCAL_FCINFO(fcinfo, 3);
1591 :
1592 6192800 : if (str == NULL && flinfo->fn_strict)
1593 : {
1594 6152 : *result = (Datum) 0; /* just return null result */
1595 6152 : return true;
1596 : }
1597 :
1598 6186648 : InitFunctionCallInfoData(*fcinfo, flinfo, 3, InvalidOid, escontext, NULL);
1599 :
1600 6186648 : fcinfo->args[0].value = CStringGetDatum(str);
1601 6186648 : fcinfo->args[0].isnull = false;
1602 6186648 : fcinfo->args[1].value = ObjectIdGetDatum(typioparam);
1603 6186648 : fcinfo->args[1].isnull = false;
1604 6186648 : fcinfo->args[2].value = Int32GetDatum(typmod);
1605 6186648 : fcinfo->args[2].isnull = false;
1606 :
1607 6186648 : *result = FunctionCallInvoke(fcinfo);
1608 :
1609 : /* Result value is garbage, and could be null, if an error was reported */
1610 6186324 : if (SOFT_ERROR_OCCURRED(escontext))
1611 1800 : return false;
1612 :
1613 : /* Otherwise, should get null result if and only if str is NULL */
1614 6184524 : if (str == NULL)
1615 : {
1616 36 : if (!fcinfo->isnull)
1617 0 : elog(ERROR, "input function %u returned non-NULL",
1618 : flinfo->fn_oid);
1619 : }
1620 : else
1621 : {
1622 6184488 : if (fcinfo->isnull)
1623 0 : elog(ERROR, "input function %u returned NULL",
1624 : flinfo->fn_oid);
1625 : }
1626 :
1627 6184524 : return true;
1628 : }
1629 :
1630 : /*
1631 : * Call a directly-named datatype input function, with non-exception
1632 : * handling of "soft" errors.
1633 : *
1634 : * This is like InputFunctionCallSafe, except that it is given a direct
1635 : * pointer to the C function to call. We assume that that function is
1636 : * strict. Also, the function cannot be one that needs to
1637 : * look at FmgrInfo, since there won't be any.
1638 : */
1639 : bool
1640 824288 : DirectInputFunctionCallSafe(PGFunction func, char *str,
1641 : Oid typioparam, int32 typmod,
1642 : Node *escontext,
1643 : Datum *result)
1644 : {
1645 824288 : LOCAL_FCINFO(fcinfo, 3);
1646 :
1647 824288 : if (str == NULL)
1648 : {
1649 0 : *result = (Datum) 0; /* just return null result */
1650 0 : return true;
1651 : }
1652 :
1653 824288 : InitFunctionCallInfoData(*fcinfo, NULL, 3, InvalidOid, escontext, NULL);
1654 :
1655 824288 : fcinfo->args[0].value = CStringGetDatum(str);
1656 824288 : fcinfo->args[0].isnull = false;
1657 824288 : fcinfo->args[1].value = ObjectIdGetDatum(typioparam);
1658 824288 : fcinfo->args[1].isnull = false;
1659 824288 : fcinfo->args[2].value = Int32GetDatum(typmod);
1660 824288 : fcinfo->args[2].isnull = false;
1661 :
1662 824288 : *result = (*func) (fcinfo);
1663 :
1664 : /* Result value is garbage, and could be null, if an error was reported */
1665 824288 : if (SOFT_ERROR_OCCURRED(escontext))
1666 306 : return false;
1667 :
1668 : /* Otherwise, shouldn't get null result */
1669 823982 : if (fcinfo->isnull)
1670 0 : elog(ERROR, "input function %p returned NULL", (void *) func);
1671 :
1672 823982 : return true;
1673 : }
1674 :
1675 : /*
1676 : * Call a previously-looked-up datatype output function.
1677 : *
1678 : * Do not call this on NULL datums.
1679 : *
1680 : * This is currently little more than window dressing for FunctionCall1.
1681 : */
1682 : char *
1683 49330160 : OutputFunctionCall(FmgrInfo *flinfo, Datum val)
1684 : {
1685 49330160 : return DatumGetCString(FunctionCall1(flinfo, val));
1686 : }
1687 :
1688 : /*
1689 : * Call a previously-looked-up datatype binary-input function.
1690 : *
1691 : * "buf" may be NULL to indicate we are reading a NULL. In this case
1692 : * the caller should assume the result is NULL, but we'll call the receive
1693 : * function anyway if it's not strict. So this is almost but not quite
1694 : * the same as FunctionCall3.
1695 : */
1696 : Datum
1697 312112 : ReceiveFunctionCall(FmgrInfo *flinfo, StringInfo buf,
1698 : Oid typioparam, int32 typmod)
1699 : {
1700 312112 : LOCAL_FCINFO(fcinfo, 3);
1701 : Datum result;
1702 :
1703 312112 : if (buf == NULL && flinfo->fn_strict)
1704 30 : return (Datum) 0; /* just return null result */
1705 :
1706 312082 : InitFunctionCallInfoData(*fcinfo, flinfo, 3, InvalidOid, NULL, NULL);
1707 :
1708 312082 : fcinfo->args[0].value = PointerGetDatum(buf);
1709 312082 : fcinfo->args[0].isnull = false;
1710 312082 : fcinfo->args[1].value = ObjectIdGetDatum(typioparam);
1711 312082 : fcinfo->args[1].isnull = false;
1712 312082 : fcinfo->args[2].value = Int32GetDatum(typmod);
1713 312082 : fcinfo->args[2].isnull = false;
1714 :
1715 312082 : result = FunctionCallInvoke(fcinfo);
1716 :
1717 : /* Should get null result if and only if buf is NULL */
1718 312082 : if (buf == NULL)
1719 : {
1720 0 : if (!fcinfo->isnull)
1721 0 : elog(ERROR, "receive function %u returned non-NULL",
1722 : flinfo->fn_oid);
1723 : }
1724 : else
1725 : {
1726 312082 : if (fcinfo->isnull)
1727 0 : elog(ERROR, "receive function %u returned NULL",
1728 : flinfo->fn_oid);
1729 : }
1730 :
1731 312082 : return result;
1732 : }
1733 :
1734 : /*
1735 : * Call a previously-looked-up datatype binary-output function.
1736 : *
1737 : * Do not call this on NULL datums.
1738 : *
1739 : * This is little more than window dressing for FunctionCall1, but it does
1740 : * guarantee a non-toasted result, which strictly speaking the underlying
1741 : * function doesn't.
1742 : */
1743 : bytea *
1744 247308 : SendFunctionCall(FmgrInfo *flinfo, Datum val)
1745 : {
1746 247308 : return DatumGetByteaP(FunctionCall1(flinfo, val));
1747 : }
1748 :
1749 : /*
1750 : * As above, for I/O functions identified by OID. These are only to be used
1751 : * in seldom-executed code paths. They are not only slow but leak memory.
1752 : */
1753 : Datum
1754 14051556 : OidInputFunctionCall(Oid functionId, char *str, Oid typioparam, int32 typmod)
1755 : {
1756 : FmgrInfo flinfo;
1757 :
1758 14051556 : fmgr_info(functionId, &flinfo);
1759 14051556 : return InputFunctionCall(&flinfo, str, typioparam, typmod);
1760 : }
1761 :
1762 : char *
1763 1066520 : OidOutputFunctionCall(Oid functionId, Datum val)
1764 : {
1765 : FmgrInfo flinfo;
1766 :
1767 1066520 : fmgr_info(functionId, &flinfo);
1768 1066520 : return OutputFunctionCall(&flinfo, val);
1769 : }
1770 :
1771 : Datum
1772 311768 : OidReceiveFunctionCall(Oid functionId, StringInfo buf,
1773 : Oid typioparam, int32 typmod)
1774 : {
1775 : FmgrInfo flinfo;
1776 :
1777 311768 : fmgr_info(functionId, &flinfo);
1778 311768 : return ReceiveFunctionCall(&flinfo, buf, typioparam, typmod);
1779 : }
1780 :
1781 : bytea *
1782 232254 : OidSendFunctionCall(Oid functionId, Datum val)
1783 : {
1784 : FmgrInfo flinfo;
1785 :
1786 232254 : fmgr_info(functionId, &flinfo);
1787 232254 : return SendFunctionCall(&flinfo, val);
1788 : }
1789 :
1790 :
1791 : /*-------------------------------------------------------------------------
1792 : * Support routines for toastable datatypes
1793 : *-------------------------------------------------------------------------
1794 : */
1795 :
1796 : struct varlena *
1797 137735144 : pg_detoast_datum(struct varlena *datum)
1798 : {
1799 137735144 : if (VARATT_IS_EXTENDED(datum))
1800 48010206 : return detoast_attr(datum);
1801 : else
1802 89724938 : return datum;
1803 : }
1804 :
1805 : struct varlena *
1806 6201946 : pg_detoast_datum_copy(struct varlena *datum)
1807 : {
1808 6201946 : if (VARATT_IS_EXTENDED(datum))
1809 3386458 : return detoast_attr(datum);
1810 : else
1811 : {
1812 : /* Make a modifiable copy of the varlena object */
1813 2815488 : Size len = VARSIZE(datum);
1814 2815488 : struct varlena *result = (struct varlena *) palloc(len);
1815 :
1816 2815488 : memcpy(result, datum, len);
1817 2815488 : return result;
1818 : }
1819 : }
1820 :
1821 : struct varlena *
1822 4422 : pg_detoast_datum_slice(struct varlena *datum, int32 first, int32 count)
1823 : {
1824 : /* Only get the specified portion from the toast rel */
1825 4422 : return detoast_attr_slice(datum, first, count);
1826 : }
1827 :
1828 : struct varlena *
1829 237272260 : pg_detoast_datum_packed(struct varlena *datum)
1830 : {
1831 237272260 : if (VARATT_IS_COMPRESSED(datum) || VARATT_IS_EXTERNAL(datum))
1832 53134 : return detoast_attr(datum);
1833 : else
1834 237219126 : return datum;
1835 : }
1836 :
1837 : /*-------------------------------------------------------------------------
1838 : * Support routines for extracting info from fn_expr parse tree
1839 : *
1840 : * These are needed by polymorphic functions, which accept multiple possible
1841 : * input types and need help from the parser to know what they've got.
1842 : * Also, some functions might be interested in whether a parameter is constant.
1843 : * Functions taking VARIADIC ANY also need to know about the VARIADIC keyword.
1844 : *-------------------------------------------------------------------------
1845 : */
1846 :
1847 : /*
1848 : * Get the actual type OID of the function return type
1849 : *
1850 : * Returns InvalidOid if information is not available
1851 : */
1852 : Oid
1853 137878 : get_fn_expr_rettype(FmgrInfo *flinfo)
1854 : {
1855 : Node *expr;
1856 :
1857 : /*
1858 : * can't return anything useful if we have no FmgrInfo or if its fn_expr
1859 : * node has not been initialized
1860 : */
1861 137878 : if (!flinfo || !flinfo->fn_expr)
1862 0 : return InvalidOid;
1863 :
1864 137878 : expr = flinfo->fn_expr;
1865 :
1866 137878 : return exprType(expr);
1867 : }
1868 :
1869 : /*
1870 : * Get the actual type OID of a specific function argument (counting from 0)
1871 : *
1872 : * Returns InvalidOid if information is not available
1873 : */
1874 : Oid
1875 2705826 : get_fn_expr_argtype(FmgrInfo *flinfo, int argnum)
1876 : {
1877 : /*
1878 : * can't return anything useful if we have no FmgrInfo or if its fn_expr
1879 : * node has not been initialized
1880 : */
1881 2705826 : if (!flinfo || !flinfo->fn_expr)
1882 0 : return InvalidOid;
1883 :
1884 2705826 : return get_call_expr_argtype(flinfo->fn_expr, argnum);
1885 : }
1886 :
1887 : /*
1888 : * Get the actual type OID of a specific function argument (counting from 0),
1889 : * but working from the calling expression tree instead of FmgrInfo
1890 : *
1891 : * Returns InvalidOid if information is not available
1892 : */
1893 : Oid
1894 2713478 : get_call_expr_argtype(Node *expr, int argnum)
1895 : {
1896 : List *args;
1897 : Oid argtype;
1898 :
1899 2713478 : if (expr == NULL)
1900 0 : return InvalidOid;
1901 :
1902 2713478 : if (IsA(expr, FuncExpr))
1903 2713442 : args = ((FuncExpr *) expr)->args;
1904 36 : else if (IsA(expr, OpExpr))
1905 36 : args = ((OpExpr *) expr)->args;
1906 0 : else if (IsA(expr, DistinctExpr))
1907 0 : args = ((DistinctExpr *) expr)->args;
1908 0 : else if (IsA(expr, ScalarArrayOpExpr))
1909 0 : args = ((ScalarArrayOpExpr *) expr)->args;
1910 0 : else if (IsA(expr, NullIfExpr))
1911 0 : args = ((NullIfExpr *) expr)->args;
1912 0 : else if (IsA(expr, WindowFunc))
1913 0 : args = ((WindowFunc *) expr)->args;
1914 : else
1915 0 : return InvalidOid;
1916 :
1917 2713478 : if (argnum < 0 || argnum >= list_length(args))
1918 0 : return InvalidOid;
1919 :
1920 2713478 : argtype = exprType((Node *) list_nth(args, argnum));
1921 :
1922 : /*
1923 : * special hack for ScalarArrayOpExpr: what the underlying function will
1924 : * actually get passed is the element type of the array.
1925 : */
1926 2713478 : if (IsA(expr, ScalarArrayOpExpr) &&
1927 : argnum == 1)
1928 0 : argtype = get_base_element_type(argtype);
1929 :
1930 2713478 : return argtype;
1931 : }
1932 :
1933 : /*
1934 : * Find out whether a specific function argument is constant for the
1935 : * duration of a query
1936 : *
1937 : * Returns false if information is not available
1938 : */
1939 : bool
1940 41968 : get_fn_expr_arg_stable(FmgrInfo *flinfo, int argnum)
1941 : {
1942 : /*
1943 : * can't return anything useful if we have no FmgrInfo or if its fn_expr
1944 : * node has not been initialized
1945 : */
1946 41968 : if (!flinfo || !flinfo->fn_expr)
1947 0 : return false;
1948 :
1949 41968 : return get_call_expr_arg_stable(flinfo->fn_expr, argnum);
1950 : }
1951 :
1952 : /*
1953 : * Find out whether a specific function argument is constant for the
1954 : * duration of a query, but working from the calling expression tree
1955 : *
1956 : * Returns false if information is not available
1957 : */
1958 : bool
1959 41968 : get_call_expr_arg_stable(Node *expr, int argnum)
1960 : {
1961 : List *args;
1962 : Node *arg;
1963 :
1964 41968 : if (expr == NULL)
1965 0 : return false;
1966 :
1967 41968 : if (IsA(expr, FuncExpr))
1968 40102 : args = ((FuncExpr *) expr)->args;
1969 1866 : else if (IsA(expr, OpExpr))
1970 0 : args = ((OpExpr *) expr)->args;
1971 1866 : else if (IsA(expr, DistinctExpr))
1972 0 : args = ((DistinctExpr *) expr)->args;
1973 1866 : else if (IsA(expr, ScalarArrayOpExpr))
1974 0 : args = ((ScalarArrayOpExpr *) expr)->args;
1975 1866 : else if (IsA(expr, NullIfExpr))
1976 0 : args = ((NullIfExpr *) expr)->args;
1977 1866 : else if (IsA(expr, WindowFunc))
1978 1866 : args = ((WindowFunc *) expr)->args;
1979 : else
1980 0 : return false;
1981 :
1982 41968 : if (argnum < 0 || argnum >= list_length(args))
1983 0 : return false;
1984 :
1985 41968 : arg = (Node *) list_nth(args, argnum);
1986 :
1987 : /*
1988 : * Either a true Const or an external Param will have a value that doesn't
1989 : * change during the execution of the query. In future we might want to
1990 : * consider other cases too, e.g. now().
1991 : */
1992 41968 : if (IsA(arg, Const))
1993 41660 : return true;
1994 308 : if (IsA(arg, Param) &&
1995 4 : ((Param *) arg)->paramkind == PARAM_EXTERN)
1996 0 : return true;
1997 :
1998 308 : return false;
1999 : }
2000 :
2001 : /*
2002 : * Get the VARIADIC flag from the function invocation
2003 : *
2004 : * Returns false (the default assumption) if information is not available
2005 : *
2006 : * Note this is generally only of interest to VARIADIC ANY functions
2007 : */
2008 : bool
2009 40064 : get_fn_expr_variadic(FmgrInfo *flinfo)
2010 : {
2011 : Node *expr;
2012 :
2013 : /*
2014 : * can't return anything useful if we have no FmgrInfo or if its fn_expr
2015 : * node has not been initialized
2016 : */
2017 40064 : if (!flinfo || !flinfo->fn_expr)
2018 0 : return false;
2019 :
2020 40064 : expr = flinfo->fn_expr;
2021 :
2022 40064 : if (IsA(expr, FuncExpr))
2023 40064 : return ((FuncExpr *) expr)->funcvariadic;
2024 : else
2025 0 : return false;
2026 : }
2027 :
2028 : /*
2029 : * Set options to FmgrInfo of opclass support function.
2030 : *
2031 : * Opclass support functions are called outside of expressions. Thanks to that
2032 : * we can use fn_expr to store opclass options as bytea constant.
2033 : */
2034 : void
2035 1205724 : set_fn_opclass_options(FmgrInfo *flinfo, bytea *options)
2036 : {
2037 1205724 : flinfo->fn_expr = (Node *) makeConst(BYTEAOID, -1, InvalidOid, -1,
2038 : PointerGetDatum(options),
2039 : options == NULL, false);
2040 1205724 : }
2041 :
2042 : /*
2043 : * Check if options are defined for opclass support function.
2044 : */
2045 : bool
2046 5420836 : has_fn_opclass_options(FmgrInfo *flinfo)
2047 : {
2048 5420836 : if (flinfo && flinfo->fn_expr && IsA(flinfo->fn_expr, Const))
2049 : {
2050 5420836 : Const *expr = (Const *) flinfo->fn_expr;
2051 :
2052 5420836 : if (expr->consttype == BYTEAOID)
2053 5420836 : return !expr->constisnull;
2054 : }
2055 0 : return false;
2056 : }
2057 :
2058 : /*
2059 : * Get options for opclass support function.
2060 : */
2061 : bytea *
2062 5629358 : get_fn_opclass_options(FmgrInfo *flinfo)
2063 : {
2064 5629358 : if (flinfo && flinfo->fn_expr && IsA(flinfo->fn_expr, Const))
2065 : {
2066 5629358 : Const *expr = (Const *) flinfo->fn_expr;
2067 :
2068 5629358 : if (expr->consttype == BYTEAOID)
2069 5629358 : return expr->constisnull ? NULL : DatumGetByteaP(expr->constvalue);
2070 : }
2071 :
2072 0 : ereport(ERROR,
2073 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
2074 : errmsg("operator class options info is absent in function call context")));
2075 :
2076 : return NULL;
2077 : }
2078 :
2079 : /*-------------------------------------------------------------------------
2080 : * Support routines for procedural language implementations
2081 : *-------------------------------------------------------------------------
2082 : */
2083 :
2084 : /*
2085 : * Verify that a validator is actually associated with the language of a
2086 : * particular function and that the user has access to both the language and
2087 : * the function. All validators should call this before doing anything
2088 : * substantial. Doing so ensures a user cannot achieve anything with explicit
2089 : * calls to validators that he could not achieve with CREATE FUNCTION or by
2090 : * simply calling an existing function.
2091 : *
2092 : * When this function returns false, callers should skip all validation work
2093 : * and call PG_RETURN_VOID(). This never happens at present; it is reserved
2094 : * for future expansion.
2095 : *
2096 : * In particular, checking that the validator corresponds to the function's
2097 : * language allows untrusted language validators to assume they process only
2098 : * superuser-chosen source code. (Untrusted language call handlers, by
2099 : * definition, do assume that.) A user lacking the USAGE language privilege
2100 : * would be unable to reach the validator through CREATE FUNCTION, so we check
2101 : * that to block explicit calls as well. Checking the EXECUTE privilege on
2102 : * the function is often superfluous, because most users can clone the
2103 : * function to get an executable copy. It is meaningful against users with no
2104 : * database TEMP right and no permanent schema CREATE right, thereby unable to
2105 : * create any function. Also, if the function tracks persistent state by
2106 : * function OID or name, validating the original function might permit more
2107 : * mischief than creating and validating a clone thereof.
2108 : */
2109 : bool
2110 26060 : CheckFunctionValidatorAccess(Oid validatorOid, Oid functionOid)
2111 : {
2112 : HeapTuple procTup;
2113 : HeapTuple langTup;
2114 : Form_pg_proc procStruct;
2115 : Form_pg_language langStruct;
2116 : AclResult aclresult;
2117 :
2118 : /*
2119 : * Get the function's pg_proc entry. Throw a user-facing error for bad
2120 : * OID, because validators can be called with user-specified OIDs.
2121 : */
2122 26060 : procTup = SearchSysCache1(PROCOID, ObjectIdGetDatum(functionOid));
2123 26060 : if (!HeapTupleIsValid(procTup))
2124 0 : ereport(ERROR,
2125 : (errcode(ERRCODE_UNDEFINED_FUNCTION),
2126 : errmsg("function with OID %u does not exist", functionOid)));
2127 26060 : procStruct = (Form_pg_proc) GETSTRUCT(procTup);
2128 :
2129 : /*
2130 : * Fetch pg_language entry to know if this is the correct validation
2131 : * function for that pg_proc entry.
2132 : */
2133 26060 : langTup = SearchSysCache1(LANGOID, ObjectIdGetDatum(procStruct->prolang));
2134 26060 : if (!HeapTupleIsValid(langTup))
2135 0 : elog(ERROR, "cache lookup failed for language %u", procStruct->prolang);
2136 26060 : langStruct = (Form_pg_language) GETSTRUCT(langTup);
2137 :
2138 26060 : if (langStruct->lanvalidator != validatorOid)
2139 0 : ereport(ERROR,
2140 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
2141 : errmsg("language validation function %u called for language %u instead of %u",
2142 : validatorOid, procStruct->prolang,
2143 : langStruct->lanvalidator)));
2144 :
2145 : /* first validate that we have permissions to use the language */
2146 26060 : aclresult = object_aclcheck(LanguageRelationId, procStruct->prolang, GetUserId(),
2147 : ACL_USAGE);
2148 26060 : if (aclresult != ACLCHECK_OK)
2149 0 : aclcheck_error(aclresult, OBJECT_LANGUAGE,
2150 0 : NameStr(langStruct->lanname));
2151 :
2152 : /*
2153 : * Check whether we are allowed to execute the function itself. If we can
2154 : * execute it, there should be no possible side-effect of
2155 : * compiling/validation that execution can't have.
2156 : */
2157 26060 : aclresult = object_aclcheck(ProcedureRelationId, functionOid, GetUserId(), ACL_EXECUTE);
2158 26060 : if (aclresult != ACLCHECK_OK)
2159 0 : aclcheck_error(aclresult, OBJECT_FUNCTION, NameStr(procStruct->proname));
2160 :
2161 26060 : ReleaseSysCache(procTup);
2162 26060 : ReleaseSysCache(langTup);
2163 :
2164 26060 : return true;
2165 : }
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