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plperl.c
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1 /**********************************************************************
2  * plperl.c - perl as a procedural language for PostgreSQL
3  *
4  * src/pl/plperl/plperl.c
5  *
6  **********************************************************************/
7 
8 #include "postgres.h"
9 
10 /* system stuff */
11 #include <ctype.h>
12 #include <fcntl.h>
13 #include <limits.h>
14 #include <unistd.h>
15 
16 /* postgreSQL stuff */
17 #include "access/htup_details.h"
18 #include "access/xact.h"
19 #include "catalog/pg_language.h"
20 #include "catalog/pg_proc.h"
21 #include "catalog/pg_type.h"
22 #include "commands/event_trigger.h"
23 #include "commands/trigger.h"
24 #include "executor/spi.h"
25 #include "funcapi.h"
26 #include "mb/pg_wchar.h"
27 #include "miscadmin.h"
28 #include "nodes/makefuncs.h"
29 #include "parser/parse_type.h"
30 #include "storage/ipc.h"
31 #include "tcop/tcopprot.h"
32 #include "utils/builtins.h"
33 #include "utils/fmgroids.h"
34 #include "utils/guc.h"
35 #include "utils/hsearch.h"
36 #include "utils/lsyscache.h"
37 #include "utils/memutils.h"
38 #include "utils/rel.h"
39 #include "utils/syscache.h"
40 #include "utils/typcache.h"
41 
42 /* define our text domain for translations */
43 #undef TEXTDOMAIN
44 #define TEXTDOMAIN PG_TEXTDOMAIN("plperl")
45 
46 /* perl stuff */
47 /* string literal macros defining chunks of perl code */
48 #include "perlchunks.h"
49 #include "plperl.h"
50 #include "plperl_helpers.h"
51 /* defines PLPERL_SET_OPMASK */
52 #include "plperl_opmask.h"
53 
57 
59 
60 /**********************************************************************
61  * Information associated with a Perl interpreter. We have one interpreter
62  * that is used for all plperlu (untrusted) functions. For plperl (trusted)
63  * functions, there is a separate interpreter for each effective SQL userid.
64  * (This is needed to ensure that an unprivileged user can't inject Perl code
65  * that'll be executed with the privileges of some other SQL user.)
66  *
67  * The plperl_interp_desc structs are kept in a Postgres hash table indexed
68  * by userid OID, with OID 0 used for the single untrusted interpreter.
69  * Once created, an interpreter is kept for the life of the process.
70  *
71  * We start out by creating a "held" interpreter, which we initialize
72  * only as far as we can do without deciding if it will be trusted or
73  * untrusted. Later, when we first need to run a plperl or plperlu
74  * function, we complete the initialization appropriately and move the
75  * PerlInterpreter pointer into the plperl_interp_hash hashtable. If after
76  * that we need more interpreters, we create them as needed if we can, or
77  * fail if the Perl build doesn't support multiple interpreters.
78  *
79  * The reason for all the dancing about with a held interpreter is to make
80  * it possible for people to preload a lot of Perl code at postmaster startup
81  * (using plperl.on_init) and then use that code in backends. Of course this
82  * will only work for the first interpreter created in any backend, but it's
83  * still useful with that restriction.
84  **********************************************************************/
85 typedef struct plperl_interp_desc
86 {
87  Oid user_id; /* Hash key (must be first!) */
88  PerlInterpreter *interp; /* The interpreter */
89  HTAB *query_hash; /* plperl_query_entry structs */
91 
92 
93 /**********************************************************************
94  * The information we cache about loaded procedures
95  *
96  * The fn_refcount field counts the struct's reference from the hash table
97  * shown below, plus one reference for each function call level that is using
98  * the struct. We can release the struct, and the associated Perl sub, when
99  * the fn_refcount goes to zero. Releasing the struct itself is done by
100  * deleting the fn_cxt, which also gets rid of all subsidiary data.
101  **********************************************************************/
102 typedef struct plperl_proc_desc
103 {
104  char *proname; /* user name of procedure */
105  MemoryContext fn_cxt; /* memory context for this procedure */
106  unsigned long fn_refcount; /* number of active references */
107  TransactionId fn_xmin; /* xmin/TID of procedure's pg_proc tuple */
109  SV *reference; /* CODE reference for Perl sub */
110  plperl_interp_desc *interp; /* interpreter it's created in */
111  bool fn_readonly; /* is function readonly (not volatile)? */
114  bool lanpltrusted; /* is it plperl, rather than plperlu? */
115  bool fn_retistuple; /* true, if function returns tuple */
116  bool fn_retisset; /* true, if function returns set */
117  bool fn_retisarray; /* true if function returns array */
118  /* Conversion info for function's result type: */
119  Oid result_oid; /* Oid of result type */
120  FmgrInfo result_in_func; /* I/O function and arg for result type */
122  /* Per-argument info for function's argument types: */
123  int nargs;
124  FmgrInfo *arg_out_func; /* output fns for arg types */
125  bool *arg_is_rowtype; /* is each arg composite? */
126  Oid *arg_arraytype; /* InvalidOid if not an array */
128 
129 #define increment_prodesc_refcount(prodesc) \
130  ((prodesc)->fn_refcount++)
131 #define decrement_prodesc_refcount(prodesc) \
132  do { \
133  Assert((prodesc)->fn_refcount > 0); \
134  if (--((prodesc)->fn_refcount) == 0) \
135  free_plperl_function(prodesc); \
136  } while(0)
137 
138 /**********************************************************************
139  * For speedy lookup, we maintain a hash table mapping from
140  * function OID + trigger flag + user OID to plperl_proc_desc pointers.
141  * The reason the plperl_proc_desc struct isn't directly part of the hash
142  * entry is to simplify recovery from errors during compile_plperl_function.
143  *
144  * Note: if the same function is called by multiple userIDs within a session,
145  * there will be a separate plperl_proc_desc entry for each userID in the case
146  * of plperl functions, but only one entry for plperlu functions, because we
147  * set user_id = 0 for that case. If the user redeclares the same function
148  * from plperl to plperlu or vice versa, there might be multiple
149  * plperl_proc_ptr entries in the hashtable, but only one is valid.
150  **********************************************************************/
151 typedef struct plperl_proc_key
152 {
153  Oid proc_id; /* Function OID */
154 
155  /*
156  * is_trigger is really a bool, but declare as Oid to ensure this struct
157  * contains no padding
158  */
159  Oid is_trigger; /* is it a trigger function? */
160  Oid user_id; /* User calling the function, or 0 */
162 
163 typedef struct plperl_proc_ptr
164 {
165  plperl_proc_key proc_key; /* Hash key (must be first!) */
168 
169 /*
170  * The information we cache for the duration of a single call to a
171  * function.
172  */
173 typedef struct plperl_call_data
174 {
177  /* remaining fields are used only in a function returning set: */
180  Oid cdomain_oid; /* 0 unless returning domain-over-composite */
184 
185 /**********************************************************************
186  * The information we cache about prepared and saved plans
187  **********************************************************************/
188 typedef struct plperl_query_desc
189 {
190  char qname[24];
191  MemoryContext plan_cxt; /* context holding this struct */
193  int nargs;
198 
199 /* hash table entry for query desc */
200 
201 typedef struct plperl_query_entry
202 {
206 
207 /**********************************************************************
208  * Information for PostgreSQL - Perl array conversion.
209  **********************************************************************/
210 typedef struct plperl_array_info
211 {
212  int ndims;
213  bool elem_is_rowtype; /* 't' if element type is a rowtype */
215  bool *nulls;
216  int *nelems;
220 
221 /**********************************************************************
222  * Global data
223  **********************************************************************/
224 
225 static HTAB *plperl_interp_hash = NULL;
226 static HTAB *plperl_proc_hash = NULL;
228 
229 /* If we have an unassigned "held" interpreter, it's stored here */
230 static PerlInterpreter *plperl_held_interp = NULL;
231 
232 /* GUC variables */
233 static bool plperl_use_strict = false;
234 static char *plperl_on_init = NULL;
235 static char *plperl_on_plperl_init = NULL;
236 static char *plperl_on_plperlu_init = NULL;
237 
238 static bool plperl_ending = false;
239 static OP *(*pp_require_orig) (pTHX) = NULL;
240 static char plperl_opmask[MAXO];
241 
242 /* this is saved and restored by plperl_call_handler */
244 
245 /**********************************************************************
246  * Forward declarations
247  **********************************************************************/
248 void _PG_init(void);
249 
250 static PerlInterpreter *plperl_init_interp(void);
251 static void plperl_destroy_interp(PerlInterpreter **);
252 static void plperl_fini(int code, Datum arg);
253 static void set_interp_require(bool trusted);
254 
258 
259 static void free_plperl_function(plperl_proc_desc *prodesc);
260 
262  bool is_trigger,
263  bool is_event_trigger);
264 
265 static SV *plperl_hash_from_tuple(HeapTuple tuple, TupleDesc tupdesc, bool include_generated);
266 static SV *plperl_hash_from_datum(Datum attr);
267 static void check_spi_usage_allowed(void);
268 static SV *plperl_ref_from_pg_array(Datum arg, Oid typid);
269 static SV *split_array(plperl_array_info *info, int first, int last, int nest);
270 static SV *make_array_ref(plperl_array_info *info, int first, int last);
271 static SV *get_perl_array_ref(SV *sv);
272 static Datum plperl_sv_to_datum(SV *sv, Oid typid, int32 typmod,
273  FunctionCallInfo fcinfo,
274  FmgrInfo *finfo, Oid typioparam,
275  bool *isnull);
276 static void _sv_to_datum_finfo(Oid typid, FmgrInfo *finfo, Oid *typioparam);
277 static Datum plperl_array_to_datum(SV *src, Oid typid, int32 typmod);
278 static void array_to_datum_internal(AV *av, ArrayBuildState *astate,
279  int *ndims, int *dims, int cur_depth,
280  Oid arraytypid, Oid elemtypid, int32 typmod,
281  FmgrInfo *finfo, Oid typioparam);
282 static Datum plperl_hash_to_datum(SV *src, TupleDesc td);
283 
284 static void plperl_init_shared_libs(pTHX);
285 static void plperl_trusted_init(void);
286 static void plperl_untrusted_init(void);
287 static HV *plperl_spi_execute_fetch_result(SPITupleTable *, uint64, int);
288 static void plperl_return_next_internal(SV *sv);
289 static char *hek2cstr(HE *he);
290 static SV **hv_store_string(HV *hv, const char *key, SV *val);
291 static SV **hv_fetch_string(HV *hv, const char *key);
292 static void plperl_create_sub(plperl_proc_desc *desc, const char *s, Oid fn_oid);
293 static SV *plperl_call_perl_func(plperl_proc_desc *desc,
294  FunctionCallInfo fcinfo);
295 static void plperl_compile_callback(void *arg);
296 static void plperl_exec_callback(void *arg);
297 static void plperl_inline_callback(void *arg);
298 static char *strip_trailing_ws(const char *msg);
299 static OP *pp_require_safe(pTHX);
300 static void activate_interpreter(plperl_interp_desc *interp_desc);
301 
302 #if defined(WIN32) && PERL_VERSION_LT(5, 28, 0)
303 static char *setlocale_perl(int category, char *locale);
304 #else
305 #define setlocale_perl(a,b) Perl_setlocale(a,b)
306 #endif /* defined(WIN32) && PERL_VERSION_LT(5, 28, 0) */
307 
308 /*
309  * Decrement the refcount of the given SV within the active Perl interpreter
310  *
311  * This is handy because it reloads the active-interpreter pointer, saving
312  * some notation in callers that switch the active interpreter.
313  */
314 static inline void
316 {
317  dTHX;
318 
319  SvREFCNT_dec(sv);
320 }
321 
322 /*
323  * convert a HE (hash entry) key to a cstr in the current database encoding
324  */
325 static char *
326 hek2cstr(HE *he)
327 {
328  dTHX;
329  char *ret;
330  SV *sv;
331 
332  /*
333  * HeSVKEY_force will return a temporary mortal SV*, so we need to make
334  * sure to free it with ENTER/SAVE/FREE/LEAVE
335  */
336  ENTER;
337  SAVETMPS;
338 
339  /*-------------------------
340  * Unfortunately, while HeUTF8 is true for most things > 256, for values
341  * 128..255 it's not, but perl will treat them as unicode code points if
342  * the utf8 flag is not set ( see The "Unicode Bug" in perldoc perlunicode
343  * for more)
344  *
345  * So if we did the expected:
346  * if (HeUTF8(he))
347  * utf_u2e(key...);
348  * else // must be ascii
349  * return HePV(he);
350  * we won't match columns with codepoints from 128..255
351  *
352  * For a more concrete example given a column with the name of the unicode
353  * codepoint U+00ae (registered sign) and a UTF8 database and the perl
354  * return_next { "\N{U+00ae}=>'text } would always fail as heUTF8 returns
355  * 0 and HePV() would give us a char * with 1 byte contains the decimal
356  * value 174
357  *
358  * Perl has the brains to know when it should utf8 encode 174 properly, so
359  * here we force it into an SV so that perl will figure it out and do the
360  * right thing
361  *-------------------------
362  */
363 
364  sv = HeSVKEY_force(he);
365  if (HeUTF8(he))
366  SvUTF8_on(sv);
367  ret = sv2cstr(sv);
368 
369  /* free sv */
370  FREETMPS;
371  LEAVE;
372 
373  return ret;
374 }
375 
376 
377 /*
378  * _PG_init() - library load-time initialization
379  *
380  * DO NOT make this static nor change its name!
381  */
382 void
383 _PG_init(void)
384 {
385  /*
386  * Be sure we do initialization only once.
387  *
388  * If initialization fails due to, e.g., plperl_init_interp() throwing an
389  * exception, then we'll return here on the next usage and the user will
390  * get a rather cryptic: ERROR: attempt to redefine parameter
391  * "plperl.use_strict"
392  */
393  static bool inited = false;
394  HASHCTL hash_ctl;
395 
396  if (inited)
397  return;
398 
399  /*
400  * Support localized messages.
401  */
403 
404  /*
405  * Initialize plperl's GUCs.
406  */
407  DefineCustomBoolVariable("plperl.use_strict",
408  gettext_noop("If true, trusted and untrusted Perl code will be compiled in strict mode."),
409  NULL,
411  false,
412  PGC_USERSET, 0,
413  NULL, NULL, NULL);
414 
415  /*
416  * plperl.on_init is marked PGC_SIGHUP to support the idea that it might
417  * be executed in the postmaster (if plperl is loaded into the postmaster
418  * via shared_preload_libraries). This isn't really right either way,
419  * though.
420  */
421  DefineCustomStringVariable("plperl.on_init",
422  gettext_noop("Perl initialization code to execute when a Perl interpreter is initialized."),
423  NULL,
425  NULL,
426  PGC_SIGHUP, 0,
427  NULL, NULL, NULL);
428 
429  /*
430  * plperl.on_plperl_init is marked PGC_SUSET to avoid issues whereby a
431  * user who might not even have USAGE privilege on the plperl language
432  * could nonetheless use SET plperl.on_plperl_init='...' to influence the
433  * behaviour of any existing plperl function that they can execute (which
434  * might be SECURITY DEFINER, leading to a privilege escalation). See
435  * http://archives.postgresql.org/pgsql-hackers/2010-02/msg00281.php and
436  * the overall thread.
437  *
438  * Note that because plperl.use_strict is USERSET, a nefarious user could
439  * set it to be applied against other people's functions. This is judged
440  * OK since the worst result would be an error. Your code oughta pass
441  * use_strict anyway ;-)
442  */
443  DefineCustomStringVariable("plperl.on_plperl_init",
444  gettext_noop("Perl initialization code to execute once when plperl is first used."),
445  NULL,
447  NULL,
448  PGC_SUSET, 0,
449  NULL, NULL, NULL);
450 
451  DefineCustomStringVariable("plperl.on_plperlu_init",
452  gettext_noop("Perl initialization code to execute once when plperlu is first used."),
453  NULL,
455  NULL,
456  PGC_SUSET, 0,
457  NULL, NULL, NULL);
458 
459  MarkGUCPrefixReserved("plperl");
460 
461  /*
462  * Create hash tables.
463  */
464  hash_ctl.keysize = sizeof(Oid);
465  hash_ctl.entrysize = sizeof(plperl_interp_desc);
466  plperl_interp_hash = hash_create("PL/Perl interpreters",
467  8,
468  &hash_ctl,
470 
471  hash_ctl.keysize = sizeof(plperl_proc_key);
472  hash_ctl.entrysize = sizeof(plperl_proc_ptr);
473  plperl_proc_hash = hash_create("PL/Perl procedures",
474  32,
475  &hash_ctl,
477 
478  /*
479  * Save the default opmask.
480  */
481  PLPERL_SET_OPMASK(plperl_opmask);
482 
483  /*
484  * Create the first Perl interpreter, but only partially initialize it.
485  */
487 
488  inited = true;
489 }
490 
491 
492 static void
493 set_interp_require(bool trusted)
494 {
495  if (trusted)
496  {
497  PL_ppaddr[OP_REQUIRE] = pp_require_safe;
498  PL_ppaddr[OP_DOFILE] = pp_require_safe;
499  }
500  else
501  {
502  PL_ppaddr[OP_REQUIRE] = pp_require_orig;
503  PL_ppaddr[OP_DOFILE] = pp_require_orig;
504  }
505 }
506 
507 /*
508  * Cleanup perl interpreters, including running END blocks.
509  * Does not fully undo the actions of _PG_init() nor make it callable again.
510  */
511 static void
513 {
514  HASH_SEQ_STATUS hash_seq;
515  plperl_interp_desc *interp_desc;
516 
517  elog(DEBUG3, "plperl_fini");
518 
519  /*
520  * Indicate that perl is terminating. Disables use of spi_* functions when
521  * running END/DESTROY code. See check_spi_usage_allowed(). Could be
522  * enabled in future, with care, using a transaction
523  * http://archives.postgresql.org/pgsql-hackers/2010-01/msg02743.php
524  */
525  plperl_ending = true;
526 
527  /* Only perform perl cleanup if we're exiting cleanly */
528  if (code)
529  {
530  elog(DEBUG3, "plperl_fini: skipped");
531  return;
532  }
533 
534  /* Zap the "held" interpreter, if we still have it */
536 
537  /* Zap any fully-initialized interpreters */
538  hash_seq_init(&hash_seq, plperl_interp_hash);
539  while ((interp_desc = hash_seq_search(&hash_seq)) != NULL)
540  {
541  if (interp_desc->interp)
542  {
543  activate_interpreter(interp_desc);
544  plperl_destroy_interp(&interp_desc->interp);
545  }
546  }
547 
548  elog(DEBUG3, "plperl_fini: done");
549 }
550 
551 
552 /*
553  * Select and activate an appropriate Perl interpreter.
554  */
555 static void
556 select_perl_context(bool trusted)
557 {
558  Oid user_id;
559  plperl_interp_desc *interp_desc;
560  bool found;
561  PerlInterpreter *interp = NULL;
562 
563  /* Find or create the interpreter hashtable entry for this userid */
564  if (trusted)
565  user_id = GetUserId();
566  else
567  user_id = InvalidOid;
568 
569  interp_desc = hash_search(plperl_interp_hash, &user_id,
570  HASH_ENTER,
571  &found);
572  if (!found)
573  {
574  /* Initialize newly-created hashtable entry */
575  interp_desc->interp = NULL;
576  interp_desc->query_hash = NULL;
577  }
578 
579  /* Make sure we have a query_hash for this interpreter */
580  if (interp_desc->query_hash == NULL)
581  {
582  HASHCTL hash_ctl;
583 
584  hash_ctl.keysize = NAMEDATALEN;
585  hash_ctl.entrysize = sizeof(plperl_query_entry);
586  interp_desc->query_hash = hash_create("PL/Perl queries",
587  32,
588  &hash_ctl,
590  }
591 
592  /*
593  * Quick exit if already have an interpreter
594  */
595  if (interp_desc->interp)
596  {
597  activate_interpreter(interp_desc);
598  return;
599  }
600 
601  /*
602  * adopt held interp if free, else create new one if possible
603  */
604  if (plperl_held_interp != NULL)
605  {
606  /* first actual use of a perl interpreter */
607  interp = plperl_held_interp;
608 
609  /*
610  * Reset the plperl_held_interp pointer first; if we fail during init
611  * we don't want to try again with the partially-initialized interp.
612  */
613  plperl_held_interp = NULL;
614 
615  if (trusted)
617  else
619 
620  /* successfully initialized, so arrange for cleanup */
622  }
623  else
624  {
625 #ifdef MULTIPLICITY
626 
627  /*
628  * plperl_init_interp will change Perl's idea of the active
629  * interpreter. Reset plperl_active_interp temporarily, so that if we
630  * hit an error partway through here, we'll make sure to switch back
631  * to a non-broken interpreter before running any other Perl
632  * functions.
633  */
634  plperl_active_interp = NULL;
635 
636  /* Now build the new interpreter */
637  interp = plperl_init_interp();
638 
639  if (trusted)
641  else
643 #else
644  ereport(ERROR,
645  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
646  errmsg("cannot allocate multiple Perl interpreters on this platform")));
647 #endif
648  }
649 
650  set_interp_require(trusted);
651 
652  /*
653  * Since the timing of first use of PL/Perl can't be predicted, any
654  * database interaction during initialization is problematic. Including,
655  * but not limited to, security definer issues. So we only enable access
656  * to the database AFTER on_*_init code has run. See
657  * http://archives.postgresql.org/pgsql-hackers/2010-01/msg02669.php
658  */
659  {
660  dTHX;
661 
662  newXS("PostgreSQL::InServer::SPI::bootstrap",
664 
665  eval_pv("PostgreSQL::InServer::SPI::bootstrap()", FALSE);
666  if (SvTRUE(ERRSV))
667  ereport(ERROR,
668  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
670  errcontext("while executing PostgreSQL::InServer::SPI::bootstrap")));
671  }
672 
673  /* Fully initialized, so mark the hashtable entry valid */
674  interp_desc->interp = interp;
675 
676  /* And mark this as the active interpreter */
677  plperl_active_interp = interp_desc;
678 }
679 
680 /*
681  * Make the specified interpreter the active one
682  *
683  * A call with NULL does nothing. This is so that "restoring" to a previously
684  * null state of plperl_active_interp doesn't result in useless thrashing.
685  */
686 static void
688 {
689  if (interp_desc && plperl_active_interp != interp_desc)
690  {
691  Assert(interp_desc->interp);
692  PERL_SET_CONTEXT(interp_desc->interp);
693  /* trusted iff user_id isn't InvalidOid */
694  set_interp_require(OidIsValid(interp_desc->user_id));
695  plperl_active_interp = interp_desc;
696  }
697 }
698 
699 /*
700  * Create a new Perl interpreter.
701  *
702  * We initialize the interpreter as far as we can without knowing whether
703  * it will become a trusted or untrusted interpreter; in particular, the
704  * plperl.on_init code will get executed. Later, either plperl_trusted_init
705  * or plperl_untrusted_init must be called to complete the initialization.
706  */
707 static PerlInterpreter *
709 {
710  PerlInterpreter *plperl;
711 
712  static char *embedding[3 + 2] = {
713  "", "-e", PLC_PERLBOOT
714  };
715  int nargs = 3;
716 
717 #ifdef WIN32
718 
719  /*
720  * The perl library on startup does horrible things like call
721  * setlocale(LC_ALL,""). We have protected against that on most platforms
722  * by setting the environment appropriately. However, on Windows,
723  * setlocale() does not consult the environment, so we need to save the
724  * existing locale settings before perl has a chance to mangle them and
725  * restore them after its dirty deeds are done.
726  *
727  * MSDN ref:
728  * http://msdn.microsoft.com/library/en-us/vclib/html/_crt_locale.asp
729  *
730  * It appears that we only need to do this on interpreter startup, and
731  * subsequent calls to the interpreter don't mess with the locale
732  * settings.
733  *
734  * We restore them using setlocale_perl(), defined below, so that Perl
735  * doesn't have a different idea of the locale from Postgres.
736  *
737  */
738 
739  char *loc;
740  char *save_collate,
741  *save_ctype,
742  *save_monetary,
743  *save_numeric,
744  *save_time;
745 
746  loc = setlocale(LC_COLLATE, NULL);
747  save_collate = loc ? pstrdup(loc) : NULL;
748  loc = setlocale(LC_CTYPE, NULL);
749  save_ctype = loc ? pstrdup(loc) : NULL;
750  loc = setlocale(LC_MONETARY, NULL);
751  save_monetary = loc ? pstrdup(loc) : NULL;
752  loc = setlocale(LC_NUMERIC, NULL);
753  save_numeric = loc ? pstrdup(loc) : NULL;
754  loc = setlocale(LC_TIME, NULL);
755  save_time = loc ? pstrdup(loc) : NULL;
756 
757 #define PLPERL_RESTORE_LOCALE(name, saved) \
758  STMT_START { \
759  if (saved != NULL) { setlocale_perl(name, saved); pfree(saved); } \
760  } STMT_END
761 #endif /* WIN32 */
762 
764  {
765  embedding[nargs++] = "-e";
766  embedding[nargs++] = plperl_on_init;
767  }
768 
769  /*
770  * The perl API docs state that PERL_SYS_INIT3 should be called before
771  * allocating interpreters. Unfortunately, on some platforms this fails in
772  * the Perl_do_taint() routine, which is called when the platform is using
773  * the system's malloc() instead of perl's own. Other platforms, notably
774  * Windows, fail if PERL_SYS_INIT3 is not called. So we call it if it's
775  * available, unless perl is using the system malloc(), which is true when
776  * MYMALLOC is set.
777  */
778 #if defined(PERL_SYS_INIT3) && !defined(MYMALLOC)
779  {
780  static int perl_sys_init_done;
781 
782  /* only call this the first time through, as per perlembed man page */
783  if (!perl_sys_init_done)
784  {
785  char *dummy_env[1] = {NULL};
786 
787  PERL_SYS_INIT3(&nargs, (char ***) &embedding, (char ***) &dummy_env);
788 
789  /*
790  * For unclear reasons, PERL_SYS_INIT3 sets the SIGFPE handler to
791  * SIG_IGN. Aside from being extremely unfriendly behavior for a
792  * library, this is dumb on the grounds that the results of a
793  * SIGFPE in this state are undefined according to POSIX, and in
794  * fact you get a forced process kill at least on Linux. Hence,
795  * restore the SIGFPE handler to the backend's standard setting.
796  * (See Perl bug 114574 for more information.)
797  */
799 
800  perl_sys_init_done = 1;
801  /* quiet warning if PERL_SYS_INIT3 doesn't use the third argument */
802  dummy_env[0] = NULL;
803  }
804  }
805 #endif
806 
807  plperl = perl_alloc();
808  if (!plperl)
809  elog(ERROR, "could not allocate Perl interpreter");
810 
811  PERL_SET_CONTEXT(plperl);
812  perl_construct(plperl);
813 
814  /*
815  * Run END blocks in perl_destruct instead of perl_run. Note that dTHX
816  * loads up a pointer to the current interpreter, so we have to postpone
817  * it to here rather than put it at the function head.
818  */
819  {
820  dTHX;
821 
822  PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
823 
824  /*
825  * Record the original function for the 'require' and 'dofile'
826  * opcodes. (They share the same implementation.) Ensure it's used
827  * for new interpreters.
828  */
829  if (!pp_require_orig)
830  pp_require_orig = PL_ppaddr[OP_REQUIRE];
831  else
832  {
833  PL_ppaddr[OP_REQUIRE] = pp_require_orig;
834  PL_ppaddr[OP_DOFILE] = pp_require_orig;
835  }
836 
837 #ifdef PLPERL_ENABLE_OPMASK_EARLY
838 
839  /*
840  * For regression testing to prove that the PLC_PERLBOOT and
841  * PLC_TRUSTED code doesn't even compile any unsafe ops. In future
842  * there may be a valid need for them to do so, in which case this
843  * could be softened (perhaps moved to plperl_trusted_init()) or
844  * removed.
845  */
846  PL_op_mask = plperl_opmask;
847 #endif
848 
849  if (perl_parse(plperl, plperl_init_shared_libs,
850  nargs, embedding, NULL) != 0)
851  ereport(ERROR,
852  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
854  errcontext("while parsing Perl initialization")));
855 
856  if (perl_run(plperl) != 0)
857  ereport(ERROR,
858  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
860  errcontext("while running Perl initialization")));
861 
862 #ifdef PLPERL_RESTORE_LOCALE
863  PLPERL_RESTORE_LOCALE(LC_COLLATE, save_collate);
864  PLPERL_RESTORE_LOCALE(LC_CTYPE, save_ctype);
865  PLPERL_RESTORE_LOCALE(LC_MONETARY, save_monetary);
866  PLPERL_RESTORE_LOCALE(LC_NUMERIC, save_numeric);
867  PLPERL_RESTORE_LOCALE(LC_TIME, save_time);
868 #endif
869  }
870 
871  return plperl;
872 }
873 
874 
875 /*
876  * Our safe implementation of the require opcode.
877  * This is safe because it's completely unable to load any code.
878  * If the requested file/module has already been loaded it'll return true.
879  * If not, it'll die.
880  * So now "use Foo;" will work iff Foo has already been loaded.
881  */
882 static OP *
884 {
885  dVAR;
886  dSP;
887  SV *sv,
888  **svp;
889  char *name;
890  STRLEN len;
891 
892  sv = POPs;
893  name = SvPV(sv, len);
894  if (!(name && len > 0 && *name))
895  RETPUSHNO;
896 
897  svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
898  if (svp && *svp != &PL_sv_undef)
899  RETPUSHYES;
900 
901  DIE(aTHX_ "Unable to load %s into plperl", name);
902 
903  /*
904  * In most Perl versions, DIE() expands to a return statement, so the next
905  * line is not necessary. But in versions between but not including
906  * 5.11.1 and 5.13.3 it does not, so the next line is necessary to avoid a
907  * "control reaches end of non-void function" warning from gcc. Other
908  * compilers such as Solaris Studio will, however, issue a "statement not
909  * reached" warning instead.
910  */
911  return NULL;
912 }
913 
914 
915 /*
916  * Destroy one Perl interpreter ... actually we just run END blocks.
917  *
918  * Caller must have ensured this interpreter is the active one.
919  */
920 static void
921 plperl_destroy_interp(PerlInterpreter **interp)
922 {
923  if (interp && *interp)
924  {
925  /*
926  * Only a very minimal destruction is performed: - just call END
927  * blocks.
928  *
929  * We could call perl_destruct() but we'd need to audit its actions
930  * very carefully and work-around any that impact us. (Calling
931  * sv_clean_objs() isn't an option because it's not part of perl's
932  * public API so isn't portably available.) Meanwhile END blocks can
933  * be used to perform manual cleanup.
934  */
935  dTHX;
936 
937  /* Run END blocks - based on perl's perl_destruct() */
938  if (PL_exit_flags & PERL_EXIT_DESTRUCT_END)
939  {
940  dJMPENV;
941  int x = 0;
942 
943  JMPENV_PUSH(x);
945  if (PL_endav && !PL_minus_c)
946  call_list(PL_scopestack_ix, PL_endav);
947  JMPENV_POP;
948  }
949  LEAVE;
950  FREETMPS;
951 
952  *interp = NULL;
953  }
954 }
955 
956 /*
957  * Initialize the current Perl interpreter as a trusted interp
958  */
959 static void
961 {
962  dTHX;
963  HV *stash;
964  SV *sv;
965  char *key;
966  I32 klen;
967 
968  /* use original require while we set up */
969  PL_ppaddr[OP_REQUIRE] = pp_require_orig;
970  PL_ppaddr[OP_DOFILE] = pp_require_orig;
971 
972  eval_pv(PLC_TRUSTED, FALSE);
973  if (SvTRUE(ERRSV))
974  ereport(ERROR,
975  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
977  errcontext("while executing PLC_TRUSTED")));
978 
979  /*
980  * Force loading of utf8 module now to prevent errors that can arise from
981  * the regex code later trying to load utf8 modules. See
982  * http://rt.perl.org/rt3/Ticket/Display.html?id=47576
983  */
984  eval_pv("my $a=chr(0x100); return $a =~ /\\xa9/i", FALSE);
985  if (SvTRUE(ERRSV))
986  ereport(ERROR,
987  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
989  errcontext("while executing utf8fix")));
990 
991  /*
992  * Lock down the interpreter
993  */
994 
995  /* switch to the safe require/dofile opcode for future code */
996  PL_ppaddr[OP_REQUIRE] = pp_require_safe;
997  PL_ppaddr[OP_DOFILE] = pp_require_safe;
998 
999  /*
1000  * prevent (any more) unsafe opcodes being compiled PL_op_mask is per
1001  * interpreter, so this only needs to be set once
1002  */
1003  PL_op_mask = plperl_opmask;
1004 
1005  /* delete the DynaLoader:: namespace so extensions can't be loaded */
1006  stash = gv_stashpv("DynaLoader", GV_ADDWARN);
1007  hv_iterinit(stash);
1008  while ((sv = hv_iternextsv(stash, &key, &klen)))
1009  {
1010  if (!isGV_with_GP(sv) || !GvCV(sv))
1011  continue;
1012  SvREFCNT_dec(GvCV(sv)); /* free the CV */
1013  GvCV_set(sv, NULL); /* prevent call via GV */
1014  }
1015  hv_clear(stash);
1016 
1017  /* invalidate assorted caches */
1018  ++PL_sub_generation;
1019  hv_clear(PL_stashcache);
1020 
1021  /*
1022  * Execute plperl.on_plperl_init in the locked-down interpreter
1023  */
1025  {
1026  eval_pv(plperl_on_plperl_init, FALSE);
1027  /* XXX need to find a way to determine a better errcode here */
1028  if (SvTRUE(ERRSV))
1029  ereport(ERROR,
1030  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
1032  errcontext("while executing plperl.on_plperl_init")));
1033  }
1034 }
1035 
1036 
1037 /*
1038  * Initialize the current Perl interpreter as an untrusted interp
1039  */
1040 static void
1042 {
1043  dTHX;
1044 
1045  /*
1046  * Nothing to do except execute plperl.on_plperlu_init
1047  */
1049  {
1050  eval_pv(plperl_on_plperlu_init, FALSE);
1051  if (SvTRUE(ERRSV))
1052  ereport(ERROR,
1053  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
1055  errcontext("while executing plperl.on_plperlu_init")));
1056  }
1057 }
1058 
1059 
1060 /*
1061  * Perl likes to put a newline after its error messages; clean up such
1062  */
1063 static char *
1064 strip_trailing_ws(const char *msg)
1065 {
1066  char *res = pstrdup(msg);
1067  int len = strlen(res);
1068 
1069  while (len > 0 && isspace((unsigned char) res[len - 1]))
1070  res[--len] = '\0';
1071  return res;
1072 }
1073 
1074 
1075 /* Build a tuple from a hash. */
1076 
1077 static HeapTuple
1079 {
1080  dTHX;
1081  Datum *values;
1082  bool *nulls;
1083  HE *he;
1084  HeapTuple tup;
1085 
1086  values = palloc0(sizeof(Datum) * td->natts);
1087  nulls = palloc(sizeof(bool) * td->natts);
1088  memset(nulls, true, sizeof(bool) * td->natts);
1089 
1090  hv_iterinit(perlhash);
1091  while ((he = hv_iternext(perlhash)))
1092  {
1093  SV *val = HeVAL(he);
1094  char *key = hek2cstr(he);
1095  int attn = SPI_fnumber(td, key);
1096  Form_pg_attribute attr = TupleDescAttr(td, attn - 1);
1097 
1098  if (attn == SPI_ERROR_NOATTRIBUTE)
1099  ereport(ERROR,
1100  (errcode(ERRCODE_UNDEFINED_COLUMN),
1101  errmsg("Perl hash contains nonexistent column \"%s\"",
1102  key)));
1103  if (attn <= 0)
1104  ereport(ERROR,
1105  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1106  errmsg("cannot set system attribute \"%s\"",
1107  key)));
1108 
1109  values[attn - 1] = plperl_sv_to_datum(val,
1110  attr->atttypid,
1111  attr->atttypmod,
1112  NULL,
1113  NULL,
1114  InvalidOid,
1115  &nulls[attn - 1]);
1116 
1117  pfree(key);
1118  }
1119  hv_iterinit(perlhash);
1120 
1121  tup = heap_form_tuple(td, values, nulls);
1122  pfree(values);
1123  pfree(nulls);
1124  return tup;
1125 }
1126 
1127 /* convert a hash reference to a datum */
1128 static Datum
1130 {
1131  HeapTuple tup = plperl_build_tuple_result((HV *) SvRV(src), td);
1132 
1133  return HeapTupleGetDatum(tup);
1134 }
1135 
1136 /*
1137  * if we are an array ref return the reference. this is special in that if we
1138  * are a PostgreSQL::InServer::ARRAY object we will return the 'magic' array.
1139  */
1140 static SV *
1142 {
1143  dTHX;
1144 
1145  if (SvOK(sv) && SvROK(sv))
1146  {
1147  if (SvTYPE(SvRV(sv)) == SVt_PVAV)
1148  return sv;
1149  else if (sv_isa(sv, "PostgreSQL::InServer::ARRAY"))
1150  {
1151  HV *hv = (HV *) SvRV(sv);
1152  SV **sav = hv_fetch_string(hv, "array");
1153 
1154  if (*sav && SvOK(*sav) && SvROK(*sav) &&
1155  SvTYPE(SvRV(*sav)) == SVt_PVAV)
1156  return *sav;
1157 
1158  elog(ERROR, "could not get array reference from PostgreSQL::InServer::ARRAY object");
1159  }
1160  }
1161  return NULL;
1162 }
1163 
1164 /*
1165  * helper function for plperl_array_to_datum, recurses for multi-D arrays
1166  */
1167 static void
1169  int *ndims, int *dims, int cur_depth,
1170  Oid arraytypid, Oid elemtypid, int32 typmod,
1171  FmgrInfo *finfo, Oid typioparam)
1172 {
1173  dTHX;
1174  int i;
1175  int len = av_len(av) + 1;
1176 
1177  for (i = 0; i < len; i++)
1178  {
1179  /* fetch the array element */
1180  SV **svp = av_fetch(av, i, FALSE);
1181 
1182  /* see if this element is an array, if so get that */
1183  SV *sav = svp ? get_perl_array_ref(*svp) : NULL;
1184 
1185  /* multi-dimensional array? */
1186  if (sav)
1187  {
1188  AV *nav = (AV *) SvRV(sav);
1189 
1190  /* dimensionality checks */
1191  if (cur_depth + 1 > MAXDIM)
1192  ereport(ERROR,
1193  (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
1194  errmsg("number of array dimensions (%d) exceeds the maximum allowed (%d)",
1195  cur_depth + 1, MAXDIM)));
1196 
1197  /* set size when at first element in this level, else compare */
1198  if (i == 0 && *ndims == cur_depth)
1199  {
1200  dims[*ndims] = av_len(nav) + 1;
1201  (*ndims)++;
1202  }
1203  else if (av_len(nav) + 1 != dims[cur_depth])
1204  ereport(ERROR,
1205  (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
1206  errmsg("multidimensional arrays must have array expressions with matching dimensions")));
1207 
1208  /* recurse to fetch elements of this sub-array */
1209  array_to_datum_internal(nav, astate,
1210  ndims, dims, cur_depth + 1,
1211  arraytypid, elemtypid, typmod,
1212  finfo, typioparam);
1213  }
1214  else
1215  {
1216  Datum dat;
1217  bool isnull;
1218 
1219  /* scalar after some sub-arrays at same level? */
1220  if (*ndims != cur_depth)
1221  ereport(ERROR,
1222  (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
1223  errmsg("multidimensional arrays must have array expressions with matching dimensions")));
1224 
1225  dat = plperl_sv_to_datum(svp ? *svp : NULL,
1226  elemtypid,
1227  typmod,
1228  NULL,
1229  finfo,
1230  typioparam,
1231  &isnull);
1232 
1233  (void) accumArrayResult(astate, dat, isnull,
1234  elemtypid, CurrentMemoryContext);
1235  }
1236  }
1237 }
1238 
1239 /*
1240  * convert perl array ref to a datum
1241  */
1242 static Datum
1243 plperl_array_to_datum(SV *src, Oid typid, int32 typmod)
1244 {
1245  dTHX;
1246  ArrayBuildState *astate;
1247  Oid elemtypid;
1248  FmgrInfo finfo;
1249  Oid typioparam;
1250  int dims[MAXDIM];
1251  int lbs[MAXDIM];
1252  int ndims = 1;
1253  int i;
1254 
1255  elemtypid = get_element_type(typid);
1256  if (!elemtypid)
1257  ereport(ERROR,
1258  (errcode(ERRCODE_DATATYPE_MISMATCH),
1259  errmsg("cannot convert Perl array to non-array type %s",
1260  format_type_be(typid))));
1261 
1262  astate = initArrayResult(elemtypid, CurrentMemoryContext, true);
1263 
1264  _sv_to_datum_finfo(elemtypid, &finfo, &typioparam);
1265 
1266  memset(dims, 0, sizeof(dims));
1267  dims[0] = av_len((AV *) SvRV(src)) + 1;
1268 
1269  array_to_datum_internal((AV *) SvRV(src), astate,
1270  &ndims, dims, 1,
1271  typid, elemtypid, typmod,
1272  &finfo, typioparam);
1273 
1274  /* ensure we get zero-D array for no inputs, as per PG convention */
1275  if (dims[0] <= 0)
1276  ndims = 0;
1277 
1278  for (i = 0; i < ndims; i++)
1279  lbs[i] = 1;
1280 
1281  return makeMdArrayResult(astate, ndims, dims, lbs,
1282  CurrentMemoryContext, true);
1283 }
1284 
1285 /* Get the information needed to convert data to the specified PG type */
1286 static void
1287 _sv_to_datum_finfo(Oid typid, FmgrInfo *finfo, Oid *typioparam)
1288 {
1289  Oid typinput;
1290 
1291  /* XXX would be better to cache these lookups */
1292  getTypeInputInfo(typid,
1293  &typinput, typioparam);
1294  fmgr_info(typinput, finfo);
1295 }
1296 
1297 /*
1298  * convert Perl SV to PG datum of type typid, typmod typmod
1299  *
1300  * Pass the PL/Perl function's fcinfo when attempting to convert to the
1301  * function's result type; otherwise pass NULL. This is used when we need to
1302  * resolve the actual result type of a function returning RECORD.
1303  *
1304  * finfo and typioparam should be the results of _sv_to_datum_finfo for the
1305  * given typid, or NULL/InvalidOid to let this function do the lookups.
1306  *
1307  * *isnull is an output parameter.
1308  */
1309 static Datum
1310 plperl_sv_to_datum(SV *sv, Oid typid, int32 typmod,
1311  FunctionCallInfo fcinfo,
1312  FmgrInfo *finfo, Oid typioparam,
1313  bool *isnull)
1314 {
1315  FmgrInfo tmp;
1316  Oid funcid;
1317 
1318  /* we might recurse */
1320 
1321  *isnull = false;
1322 
1323  /*
1324  * Return NULL if result is undef, or if we're in a function returning
1325  * VOID. In the latter case, we should pay no attention to the last Perl
1326  * statement's result, and this is a convenient means to ensure that.
1327  */
1328  if (!sv || !SvOK(sv) || typid == VOIDOID)
1329  {
1330  /* look up type info if they did not pass it */
1331  if (!finfo)
1332  {
1333  _sv_to_datum_finfo(typid, &tmp, &typioparam);
1334  finfo = &tmp;
1335  }
1336  *isnull = true;
1337  /* must call typinput in case it wants to reject NULL */
1338  return InputFunctionCall(finfo, NULL, typioparam, typmod);
1339  }
1341  return OidFunctionCall1(funcid, PointerGetDatum(sv));
1342  else if (SvROK(sv))
1343  {
1344  /* handle references */
1345  SV *sav = get_perl_array_ref(sv);
1346 
1347  if (sav)
1348  {
1349  /* handle an arrayref */
1350  return plperl_array_to_datum(sav, typid, typmod);
1351  }
1352  else if (SvTYPE(SvRV(sv)) == SVt_PVHV)
1353  {
1354  /* handle a hashref */
1355  Datum ret;
1356  TupleDesc td;
1357  bool isdomain;
1358 
1359  if (!type_is_rowtype(typid))
1360  ereport(ERROR,
1361  (errcode(ERRCODE_DATATYPE_MISMATCH),
1362  errmsg("cannot convert Perl hash to non-composite type %s",
1363  format_type_be(typid))));
1364 
1365  td = lookup_rowtype_tupdesc_domain(typid, typmod, true);
1366  if (td != NULL)
1367  {
1368  /* Did we look through a domain? */
1369  isdomain = (typid != td->tdtypeid);
1370  }
1371  else
1372  {
1373  /* Must be RECORD, try to resolve based on call info */
1374  TypeFuncClass funcclass;
1375 
1376  if (fcinfo)
1377  funcclass = get_call_result_type(fcinfo, &typid, &td);
1378  else
1379  funcclass = TYPEFUNC_OTHER;
1380  if (funcclass != TYPEFUNC_COMPOSITE &&
1381  funcclass != TYPEFUNC_COMPOSITE_DOMAIN)
1382  ereport(ERROR,
1383  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1384  errmsg("function returning record called in context "
1385  "that cannot accept type record")));
1386  Assert(td);
1387  isdomain = (funcclass == TYPEFUNC_COMPOSITE_DOMAIN);
1388  }
1389 
1390  ret = plperl_hash_to_datum(sv, td);
1391 
1392  if (isdomain)
1393  domain_check(ret, false, typid, NULL, NULL);
1394 
1395  /* Release on the result of get_call_result_type is harmless */
1396  ReleaseTupleDesc(td);
1397 
1398  return ret;
1399  }
1400 
1401  /*
1402  * If it's a reference to something else, such as a scalar, just
1403  * recursively look through the reference.
1404  */
1405  return plperl_sv_to_datum(SvRV(sv), typid, typmod,
1406  fcinfo, finfo, typioparam,
1407  isnull);
1408  }
1409  else
1410  {
1411  /* handle a string/number */
1412  Datum ret;
1413  char *str = sv2cstr(sv);
1414 
1415  /* did not pass in any typeinfo? look it up */
1416  if (!finfo)
1417  {
1418  _sv_to_datum_finfo(typid, &tmp, &typioparam);
1419  finfo = &tmp;
1420  }
1421 
1422  ret = InputFunctionCall(finfo, str, typioparam, typmod);
1423  pfree(str);
1424 
1425  return ret;
1426  }
1427 }
1428 
1429 /* Convert the perl SV to a string returned by the type output function */
1430 char *
1431 plperl_sv_to_literal(SV *sv, char *fqtypename)
1432 {
1433  Oid typid;
1434  Oid typoutput;
1435  Datum datum;
1436  bool typisvarlena,
1437  isnull;
1438 
1440 
1441  typid = DirectFunctionCall1(regtypein, CStringGetDatum(fqtypename));
1442  if (!OidIsValid(typid))
1443  ereport(ERROR,
1444  (errcode(ERRCODE_UNDEFINED_OBJECT),
1445  errmsg("lookup failed for type %s", fqtypename)));
1446 
1447  datum = plperl_sv_to_datum(sv,
1448  typid, -1,
1449  NULL, NULL, InvalidOid,
1450  &isnull);
1451 
1452  if (isnull)
1453  return NULL;
1454 
1455  getTypeOutputInfo(typid,
1456  &typoutput, &typisvarlena);
1457 
1458  return OidOutputFunctionCall(typoutput, datum);
1459 }
1460 
1461 /*
1462  * Convert PostgreSQL array datum to a perl array reference.
1463  *
1464  * typid is arg's OID, which must be an array type.
1465  */
1466 static SV *
1468 {
1469  dTHX;
1471  Oid elementtype = ARR_ELEMTYPE(ar);
1472  int16 typlen;
1473  bool typbyval;
1474  char typalign,
1475  typdelim;
1476  Oid typioparam;
1477  Oid typoutputfunc;
1478  Oid transform_funcid;
1479  int i,
1480  nitems,
1481  *dims;
1482  plperl_array_info *info;
1483  SV *av;
1484  HV *hv;
1485 
1486  /*
1487  * Currently we make no effort to cache any of the stuff we look up here,
1488  * which is bad.
1489  */
1490  info = palloc0(sizeof(plperl_array_info));
1491 
1492  /* get element type information, including output conversion function */
1493  get_type_io_data(elementtype, IOFunc_output,
1494  &typlen, &typbyval, &typalign,
1495  &typdelim, &typioparam, &typoutputfunc);
1496 
1497  /* Check for a transform function */
1498  transform_funcid = get_transform_fromsql(elementtype,
1501 
1502  /* Look up transform or output function as appropriate */
1503  if (OidIsValid(transform_funcid))
1504  fmgr_info(transform_funcid, &info->transform_proc);
1505  else
1506  fmgr_info(typoutputfunc, &info->proc);
1507 
1508  info->elem_is_rowtype = type_is_rowtype(elementtype);
1509 
1510  /* Get the number and bounds of array dimensions */
1511  info->ndims = ARR_NDIM(ar);
1512  dims = ARR_DIMS(ar);
1513 
1514  /* No dimensions? Return an empty array */
1515  if (info->ndims == 0)
1516  {
1517  av = newRV_noinc((SV *) newAV());
1518  }
1519  else
1520  {
1521  deconstruct_array(ar, elementtype, typlen, typbyval,
1522  typalign, &info->elements, &info->nulls,
1523  &nitems);
1524 
1525  /* Get total number of elements in each dimension */
1526  info->nelems = palloc(sizeof(int) * info->ndims);
1527  info->nelems[0] = nitems;
1528  for (i = 1; i < info->ndims; i++)
1529  info->nelems[i] = info->nelems[i - 1] / dims[i - 1];
1530 
1531  av = split_array(info, 0, nitems, 0);
1532  }
1533 
1534  hv = newHV();
1535  (void) hv_store(hv, "array", 5, av, 0);
1536  (void) hv_store(hv, "typeoid", 7, newSVuv(typid), 0);
1537 
1538  return sv_bless(newRV_noinc((SV *) hv),
1539  gv_stashpv("PostgreSQL::InServer::ARRAY", 0));
1540 }
1541 
1542 /*
1543  * Recursively form array references from splices of the initial array
1544  */
1545 static SV *
1546 split_array(plperl_array_info *info, int first, int last, int nest)
1547 {
1548  dTHX;
1549  int i;
1550  AV *result;
1551 
1552  /* we should only be called when we have something to split */
1553  Assert(info->ndims > 0);
1554 
1555  /* since this function recurses, it could be driven to stack overflow */
1557 
1558  /*
1559  * Base case, return a reference to a single-dimensional array
1560  */
1561  if (nest >= info->ndims - 1)
1562  return make_array_ref(info, first, last);
1563 
1564  result = newAV();
1565  for (i = first; i < last; i += info->nelems[nest + 1])
1566  {
1567  /* Recursively form references to arrays of lower dimensions */
1568  SV *ref = split_array(info, i, i + info->nelems[nest + 1], nest + 1);
1569 
1570  av_push(result, ref);
1571  }
1572  return newRV_noinc((SV *) result);
1573 }
1574 
1575 /*
1576  * Create a Perl reference from a one-dimensional C array, converting
1577  * composite type elements to hash references.
1578  */
1579 static SV *
1580 make_array_ref(plperl_array_info *info, int first, int last)
1581 {
1582  dTHX;
1583  int i;
1584  AV *result = newAV();
1585 
1586  for (i = first; i < last; i++)
1587  {
1588  if (info->nulls[i])
1589  {
1590  /*
1591  * We can't use &PL_sv_undef here. See "AVs, HVs and undefined
1592  * values" in perlguts.
1593  */
1594  av_push(result, newSV(0));
1595  }
1596  else
1597  {
1598  Datum itemvalue = info->elements[i];
1599 
1600  if (info->transform_proc.fn_oid)
1601  av_push(result, (SV *) DatumGetPointer(FunctionCall1(&info->transform_proc, itemvalue)));
1602  else if (info->elem_is_rowtype)
1603  /* Handle composite type elements */
1604  av_push(result, plperl_hash_from_datum(itemvalue));
1605  else
1606  {
1607  char *val = OutputFunctionCall(&info->proc, itemvalue);
1608 
1609  av_push(result, cstr2sv(val));
1610  }
1611  }
1612  }
1613  return newRV_noinc((SV *) result);
1614 }
1615 
1616 /* Set up the arguments for a trigger call. */
1617 static SV *
1619 {
1620  dTHX;
1621  TriggerData *tdata;
1622  TupleDesc tupdesc;
1623  int i;
1624  char *level;
1625  char *event;
1626  char *relid;
1627  char *when;
1628  HV *hv;
1629 
1630  hv = newHV();
1631  hv_ksplit(hv, 12); /* pre-grow the hash */
1632 
1633  tdata = (TriggerData *) fcinfo->context;
1634  tupdesc = tdata->tg_relation->rd_att;
1635 
1637  ObjectIdGetDatum(tdata->tg_relation->rd_id)));
1638 
1639  hv_store_string(hv, "name", cstr2sv(tdata->tg_trigger->tgname));
1640  hv_store_string(hv, "relid", cstr2sv(relid));
1641 
1642  /*
1643  * Note: In BEFORE trigger, stored generated columns are not computed yet,
1644  * so don't make them accessible in NEW row.
1645  */
1646 
1647  if (TRIGGER_FIRED_BY_INSERT(tdata->tg_event))
1648  {
1649  event = "INSERT";
1650  if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
1651  hv_store_string(hv, "new",
1653  tupdesc,
1654  !TRIGGER_FIRED_BEFORE(tdata->tg_event)));
1655  }
1656  else if (TRIGGER_FIRED_BY_DELETE(tdata->tg_event))
1657  {
1658  event = "DELETE";
1659  if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
1660  hv_store_string(hv, "old",
1662  tupdesc,
1663  true));
1664  }
1665  else if (TRIGGER_FIRED_BY_UPDATE(tdata->tg_event))
1666  {
1667  event = "UPDATE";
1668  if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
1669  {
1670  hv_store_string(hv, "old",
1672  tupdesc,
1673  true));
1674  hv_store_string(hv, "new",
1676  tupdesc,
1677  !TRIGGER_FIRED_BEFORE(tdata->tg_event)));
1678  }
1679  }
1680  else if (TRIGGER_FIRED_BY_TRUNCATE(tdata->tg_event))
1681  event = "TRUNCATE";
1682  else
1683  event = "UNKNOWN";
1684 
1685  hv_store_string(hv, "event", cstr2sv(event));
1686  hv_store_string(hv, "argc", newSViv(tdata->tg_trigger->tgnargs));
1687 
1688  if (tdata->tg_trigger->tgnargs > 0)
1689  {
1690  AV *av = newAV();
1691 
1692  av_extend(av, tdata->tg_trigger->tgnargs);
1693  for (i = 0; i < tdata->tg_trigger->tgnargs; i++)
1694  av_push(av, cstr2sv(tdata->tg_trigger->tgargs[i]));
1695  hv_store_string(hv, "args", newRV_noinc((SV *) av));
1696  }
1697 
1698  hv_store_string(hv, "relname",
1700 
1701  hv_store_string(hv, "table_name",
1703 
1704  hv_store_string(hv, "table_schema",
1706 
1707  if (TRIGGER_FIRED_BEFORE(tdata->tg_event))
1708  when = "BEFORE";
1709  else if (TRIGGER_FIRED_AFTER(tdata->tg_event))
1710  when = "AFTER";
1711  else if (TRIGGER_FIRED_INSTEAD(tdata->tg_event))
1712  when = "INSTEAD OF";
1713  else
1714  when = "UNKNOWN";
1715  hv_store_string(hv, "when", cstr2sv(when));
1716 
1717  if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
1718  level = "ROW";
1719  else if (TRIGGER_FIRED_FOR_STATEMENT(tdata->tg_event))
1720  level = "STATEMENT";
1721  else
1722  level = "UNKNOWN";
1723  hv_store_string(hv, "level", cstr2sv(level));
1724 
1725  return newRV_noinc((SV *) hv);
1726 }
1727 
1728 
1729 /* Set up the arguments for an event trigger call. */
1730 static SV *
1732 {
1733  dTHX;
1734  EventTriggerData *tdata;
1735  HV *hv;
1736 
1737  hv = newHV();
1738 
1739  tdata = (EventTriggerData *) fcinfo->context;
1740 
1741  hv_store_string(hv, "event", cstr2sv(tdata->event));
1742  hv_store_string(hv, "tag", cstr2sv(GetCommandTagName(tdata->tag)));
1743 
1744  return newRV_noinc((SV *) hv);
1745 }
1746 
1747 /* Construct the modified new tuple to be returned from a trigger. */
1748 static HeapTuple
1750 {
1751  dTHX;
1752  SV **svp;
1753  HV *hvNew;
1754  HE *he;
1755  HeapTuple rtup;
1756  TupleDesc tupdesc;
1757  int natts;
1758  Datum *modvalues;
1759  bool *modnulls;
1760  bool *modrepls;
1761 
1762  svp = hv_fetch_string(hvTD, "new");
1763  if (!svp)
1764  ereport(ERROR,
1765  (errcode(ERRCODE_UNDEFINED_COLUMN),
1766  errmsg("$_TD->{new} does not exist")));
1767  if (!SvOK(*svp) || !SvROK(*svp) || SvTYPE(SvRV(*svp)) != SVt_PVHV)
1768  ereport(ERROR,
1769  (errcode(ERRCODE_DATATYPE_MISMATCH),
1770  errmsg("$_TD->{new} is not a hash reference")));
1771  hvNew = (HV *) SvRV(*svp);
1772 
1773  tupdesc = tdata->tg_relation->rd_att;
1774  natts = tupdesc->natts;
1775 
1776  modvalues = (Datum *) palloc0(natts * sizeof(Datum));
1777  modnulls = (bool *) palloc0(natts * sizeof(bool));
1778  modrepls = (bool *) palloc0(natts * sizeof(bool));
1779 
1780  hv_iterinit(hvNew);
1781  while ((he = hv_iternext(hvNew)))
1782  {
1783  char *key = hek2cstr(he);
1784  SV *val = HeVAL(he);
1785  int attn = SPI_fnumber(tupdesc, key);
1786  Form_pg_attribute attr = TupleDescAttr(tupdesc, attn - 1);
1787 
1788  if (attn == SPI_ERROR_NOATTRIBUTE)
1789  ereport(ERROR,
1790  (errcode(ERRCODE_UNDEFINED_COLUMN),
1791  errmsg("Perl hash contains nonexistent column \"%s\"",
1792  key)));
1793  if (attn <= 0)
1794  ereport(ERROR,
1795  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1796  errmsg("cannot set system attribute \"%s\"",
1797  key)));
1798  if (attr->attgenerated)
1799  ereport(ERROR,
1800  (errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
1801  errmsg("cannot set generated column \"%s\"",
1802  key)));
1803 
1804  modvalues[attn - 1] = plperl_sv_to_datum(val,
1805  attr->atttypid,
1806  attr->atttypmod,
1807  NULL,
1808  NULL,
1809  InvalidOid,
1810  &modnulls[attn - 1]);
1811  modrepls[attn - 1] = true;
1812 
1813  pfree(key);
1814  }
1815  hv_iterinit(hvNew);
1816 
1817  rtup = heap_modify_tuple(otup, tupdesc, modvalues, modnulls, modrepls);
1818 
1819  pfree(modvalues);
1820  pfree(modnulls);
1821  pfree(modrepls);
1822 
1823  return rtup;
1824 }
1825 
1826 
1827 /*
1828  * There are three externally visible pieces to plperl: plperl_call_handler,
1829  * plperl_inline_handler, and plperl_validator.
1830  */
1831 
1832 /*
1833  * The call handler is called to run normal functions (including trigger
1834  * functions) that are defined in pg_proc.
1835  */
1837 
1838 Datum
1840 {
1841  Datum retval = (Datum) 0;
1842  plperl_call_data *volatile save_call_data = current_call_data;
1843  plperl_interp_desc *volatile oldinterp = plperl_active_interp;
1844  plperl_call_data this_call_data;
1845 
1846  /* Initialize current-call status record */
1847  MemSet(&this_call_data, 0, sizeof(this_call_data));
1848  this_call_data.fcinfo = fcinfo;
1849 
1850  PG_TRY();
1851  {
1852  current_call_data = &this_call_data;
1853  if (CALLED_AS_TRIGGER(fcinfo))
1854  retval = PointerGetDatum(plperl_trigger_handler(fcinfo));
1855  else if (CALLED_AS_EVENT_TRIGGER(fcinfo))
1856  {
1858  retval = (Datum) 0;
1859  }
1860  else
1861  retval = plperl_func_handler(fcinfo);
1862  }
1863  PG_FINALLY();
1864  {
1865  current_call_data = save_call_data;
1866  activate_interpreter(oldinterp);
1867  if (this_call_data.prodesc)
1868  decrement_prodesc_refcount(this_call_data.prodesc);
1869  }
1870  PG_END_TRY();
1871 
1872  return retval;
1873 }
1874 
1875 /*
1876  * The inline handler runs anonymous code blocks (DO blocks).
1877  */
1879 
1880 Datum
1882 {
1883  LOCAL_FCINFO(fake_fcinfo, 0);
1885  FmgrInfo flinfo;
1886  plperl_proc_desc desc;
1887  plperl_call_data *volatile save_call_data = current_call_data;
1888  plperl_interp_desc *volatile oldinterp = plperl_active_interp;
1889  plperl_call_data this_call_data;
1890  ErrorContextCallback pl_error_context;
1891 
1892  /* Initialize current-call status record */
1893  MemSet(&this_call_data, 0, sizeof(this_call_data));
1894 
1895  /* Set up a callback for error reporting */
1896  pl_error_context.callback = plperl_inline_callback;
1897  pl_error_context.previous = error_context_stack;
1898  pl_error_context.arg = NULL;
1899  error_context_stack = &pl_error_context;
1900 
1901  /*
1902  * Set up a fake fcinfo and descriptor with just enough info to satisfy
1903  * plperl_call_perl_func(). In particular note that this sets things up
1904  * with no arguments passed, and a result type of VOID.
1905  */
1906  MemSet(fake_fcinfo, 0, SizeForFunctionCallInfo(0));
1907  MemSet(&flinfo, 0, sizeof(flinfo));
1908  MemSet(&desc, 0, sizeof(desc));
1909  fake_fcinfo->flinfo = &flinfo;
1910  flinfo.fn_oid = InvalidOid;
1911  flinfo.fn_mcxt = CurrentMemoryContext;
1912 
1913  desc.proname = "inline_code_block";
1914  desc.fn_readonly = false;
1915 
1916  desc.lang_oid = codeblock->langOid;
1917  desc.trftypes = NIL;
1918  desc.lanpltrusted = codeblock->langIsTrusted;
1919 
1920  desc.fn_retistuple = false;
1921  desc.fn_retisset = false;
1922  desc.fn_retisarray = false;
1923  desc.result_oid = InvalidOid;
1924  desc.nargs = 0;
1925  desc.reference = NULL;
1926 
1927  this_call_data.fcinfo = fake_fcinfo;
1928  this_call_data.prodesc = &desc;
1929  /* we do not bother with refcounting the fake prodesc */
1930 
1931  PG_TRY();
1932  {
1933  SV *perlret;
1934 
1935  current_call_data = &this_call_data;
1936 
1937  if (SPI_connect_ext(codeblock->atomic ? 0 : SPI_OPT_NONATOMIC) != SPI_OK_CONNECT)
1938  elog(ERROR, "could not connect to SPI manager");
1939 
1941 
1942  plperl_create_sub(&desc, codeblock->source_text, 0);
1943 
1944  if (!desc.reference) /* can this happen? */
1945  elog(ERROR, "could not create internal procedure for anonymous code block");
1946 
1947  perlret = plperl_call_perl_func(&desc, fake_fcinfo);
1948 
1949  SvREFCNT_dec_current(perlret);
1950 
1951  if (SPI_finish() != SPI_OK_FINISH)
1952  elog(ERROR, "SPI_finish() failed");
1953  }
1954  PG_FINALLY();
1955  {
1956  if (desc.reference)
1958  current_call_data = save_call_data;
1959  activate_interpreter(oldinterp);
1960  }
1961  PG_END_TRY();
1962 
1963  error_context_stack = pl_error_context.previous;
1964 
1965  PG_RETURN_VOID();
1966 }
1967 
1968 /*
1969  * The validator is called during CREATE FUNCTION to validate the function
1970  * being created/replaced. The precise behavior of the validator may be
1971  * modified by the check_function_bodies GUC.
1972  */
1974 
1975 Datum
1977 {
1978  Oid funcoid = PG_GETARG_OID(0);
1979  HeapTuple tuple;
1980  Form_pg_proc proc;
1981  char functyptype;
1982  int numargs;
1983  Oid *argtypes;
1984  char **argnames;
1985  char *argmodes;
1986  bool is_trigger = false;
1987  bool is_event_trigger = false;
1988  int i;
1989 
1990  if (!CheckFunctionValidatorAccess(fcinfo->flinfo->fn_oid, funcoid))
1991  PG_RETURN_VOID();
1992 
1993  /* Get the new function's pg_proc entry */
1994  tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcoid));
1995  if (!HeapTupleIsValid(tuple))
1996  elog(ERROR, "cache lookup failed for function %u", funcoid);
1997  proc = (Form_pg_proc) GETSTRUCT(tuple);
1998 
1999  functyptype = get_typtype(proc->prorettype);
2000 
2001  /* Disallow pseudotype result */
2002  /* except for TRIGGER, EVTTRIGGER, RECORD, or VOID */
2003  if (functyptype == TYPTYPE_PSEUDO)
2004  {
2005  if (proc->prorettype == TRIGGEROID)
2006  is_trigger = true;
2007  else if (proc->prorettype == EVENT_TRIGGEROID)
2008  is_event_trigger = true;
2009  else if (proc->prorettype != RECORDOID &&
2010  proc->prorettype != VOIDOID)
2011  ereport(ERROR,
2012  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2013  errmsg("PL/Perl functions cannot return type %s",
2014  format_type_be(proc->prorettype))));
2015  }
2016 
2017  /* Disallow pseudotypes in arguments (either IN or OUT) */
2018  numargs = get_func_arg_info(tuple,
2019  &argtypes, &argnames, &argmodes);
2020  for (i = 0; i < numargs; i++)
2021  {
2022  if (get_typtype(argtypes[i]) == TYPTYPE_PSEUDO &&
2023  argtypes[i] != RECORDOID)
2024  ereport(ERROR,
2025  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2026  errmsg("PL/Perl functions cannot accept type %s",
2027  format_type_be(argtypes[i]))));
2028  }
2029 
2030  ReleaseSysCache(tuple);
2031 
2032  /* Postpone body checks if !check_function_bodies */
2034  {
2035  (void) compile_plperl_function(funcoid, is_trigger, is_event_trigger);
2036  }
2037 
2038  /* the result of a validator is ignored */
2039  PG_RETURN_VOID();
2040 }
2041 
2042 
2043 /*
2044  * plperlu likewise requires three externally visible functions:
2045  * plperlu_call_handler, plperlu_inline_handler, and plperlu_validator.
2046  * These are currently just aliases that send control to the plperl
2047  * handler functions, and we decide whether a particular function is
2048  * trusted or not by inspecting the actual pg_language tuple.
2049  */
2050 
2052 
2053 Datum
2055 {
2056  return plperl_call_handler(fcinfo);
2057 }
2058 
2060 
2061 Datum
2063 {
2064  return plperl_inline_handler(fcinfo);
2065 }
2066 
2068 
2069 Datum
2071 {
2072  /* call plperl validator with our fcinfo so it gets our oid */
2073  return plperl_validator(fcinfo);
2074 }
2075 
2076 
2077 /*
2078  * Uses mkfunc to create a subroutine whose text is
2079  * supplied in s, and returns a reference to it
2080  */
2081 static void
2082 plperl_create_sub(plperl_proc_desc *prodesc, const char *s, Oid fn_oid)
2083 {
2084  dTHX;
2085  dSP;
2086  char subname[NAMEDATALEN + 40];
2087  HV *pragma_hv = newHV();
2088  SV *subref = NULL;
2089  int count;
2090 
2091  sprintf(subname, "%s__%u", prodesc->proname, fn_oid);
2092 
2093  if (plperl_use_strict)
2094  hv_store_string(pragma_hv, "strict", (SV *) newAV());
2095 
2096  ENTER;
2097  SAVETMPS;
2098  PUSHMARK(SP);
2099  EXTEND(SP, 4);
2100  PUSHs(sv_2mortal(cstr2sv(subname)));
2101  PUSHs(sv_2mortal(newRV_noinc((SV *) pragma_hv)));
2102 
2103  /*
2104  * Use 'false' for $prolog in mkfunc, which is kept for compatibility in
2105  * case a module such as PostgreSQL::PLPerl::NYTprof replaces the function
2106  * compiler.
2107  */
2108  PUSHs(&PL_sv_no);
2109  PUSHs(sv_2mortal(cstr2sv(s)));
2110  PUTBACK;
2111 
2112  /*
2113  * G_KEEPERR seems to be needed here, else we don't recognize compile
2114  * errors properly. Perhaps it's because there's another level of eval
2115  * inside mksafefunc?
2116  */
2117  count = call_pv("PostgreSQL::InServer::mkfunc",
2118  G_SCALAR | G_EVAL | G_KEEPERR);
2119  SPAGAIN;
2120 
2121  if (count == 1)
2122  {
2123  SV *sub_rv = (SV *) POPs;
2124 
2125  if (sub_rv && SvROK(sub_rv) && SvTYPE(SvRV(sub_rv)) == SVt_PVCV)
2126  {
2127  subref = newRV_inc(SvRV(sub_rv));
2128  }
2129  }
2130 
2131  PUTBACK;
2132  FREETMPS;
2133  LEAVE;
2134 
2135  if (SvTRUE(ERRSV))
2136  ereport(ERROR,
2137  (errcode(ERRCODE_SYNTAX_ERROR),
2139 
2140  if (!subref)
2141  ereport(ERROR,
2142  (errcode(ERRCODE_SYNTAX_ERROR),
2143  errmsg("didn't get a CODE reference from compiling function \"%s\"",
2144  prodesc->proname)));
2145 
2146  prodesc->reference = subref;
2147 }
2148 
2149 
2150 /**********************************************************************
2151  * plperl_init_shared_libs() -
2152  **********************************************************************/
2153 
2154 static void
2156 {
2157  char *file = __FILE__;
2158 
2159  newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
2160  newXS("PostgreSQL::InServer::Util::bootstrap",
2162  /* newXS for...::SPI::bootstrap is in select_perl_context() */
2163 }
2164 
2165 
2166 static SV *
2168 {
2169  dTHX;
2170  dSP;
2171  SV *retval;
2172  int i;
2173  int count;
2174  Oid *argtypes = NULL;
2175  int nargs = 0;
2176 
2177  ENTER;
2178  SAVETMPS;
2179 
2180  PUSHMARK(SP);
2181  EXTEND(sp, desc->nargs);
2182 
2183  /* Get signature for true functions; inline blocks have no args. */
2184  if (fcinfo->flinfo->fn_oid)
2185  get_func_signature(fcinfo->flinfo->fn_oid, &argtypes, &nargs);
2186  Assert(nargs == desc->nargs);
2187 
2188  for (i = 0; i < desc->nargs; i++)
2189  {
2190  if (fcinfo->args[i].isnull)
2191  PUSHs(&PL_sv_undef);
2192  else if (desc->arg_is_rowtype[i])
2193  {
2194  SV *sv = plperl_hash_from_datum(fcinfo->args[i].value);
2195 
2196  PUSHs(sv_2mortal(sv));
2197  }
2198  else
2199  {
2200  SV *sv;
2201  Oid funcid;
2202 
2203  if (OidIsValid(desc->arg_arraytype[i]))
2204  sv = plperl_ref_from_pg_array(fcinfo->args[i].value, desc->arg_arraytype[i]);
2206  sv = (SV *) DatumGetPointer(OidFunctionCall1(funcid, fcinfo->args[i].value));
2207  else
2208  {
2209  char *tmp;
2210 
2211  tmp = OutputFunctionCall(&(desc->arg_out_func[i]),
2212  fcinfo->args[i].value);
2213  sv = cstr2sv(tmp);
2214  pfree(tmp);
2215  }
2216 
2217  PUSHs(sv_2mortal(sv));
2218  }
2219  }
2220  PUTBACK;
2221 
2222  /* Do NOT use G_KEEPERR here */
2223  count = call_sv(desc->reference, G_SCALAR | G_EVAL);
2224 
2225  SPAGAIN;
2226 
2227  if (count != 1)
2228  {
2229  PUTBACK;
2230  FREETMPS;
2231  LEAVE;
2232  ereport(ERROR,
2233  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2234  errmsg("didn't get a return item from function")));
2235  }
2236 
2237  if (SvTRUE(ERRSV))
2238  {
2239  (void) POPs;
2240  PUTBACK;
2241  FREETMPS;
2242  LEAVE;
2243  /* XXX need to find a way to determine a better errcode here */
2244  ereport(ERROR,
2245  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2247  }
2248 
2249  retval = newSVsv(POPs);
2250 
2251  PUTBACK;
2252  FREETMPS;
2253  LEAVE;
2254 
2255  return retval;
2256 }
2257 
2258 
2259 static SV *
2261  SV *td)
2262 {
2263  dTHX;
2264  dSP;
2265  SV *retval,
2266  *TDsv;
2267  int i,
2268  count;
2269  Trigger *tg_trigger = ((TriggerData *) fcinfo->context)->tg_trigger;
2270 
2271  ENTER;
2272  SAVETMPS;
2273 
2274  TDsv = get_sv("main::_TD", 0);
2275  if (!TDsv)
2276  ereport(ERROR,
2277  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2278  errmsg("couldn't fetch $_TD")));
2279 
2280  save_item(TDsv); /* local $_TD */
2281  sv_setsv(TDsv, td);
2282 
2283  PUSHMARK(sp);
2284  EXTEND(sp, tg_trigger->tgnargs);
2285 
2286  for (i = 0; i < tg_trigger->tgnargs; i++)
2287  PUSHs(sv_2mortal(cstr2sv(tg_trigger->tgargs[i])));
2288  PUTBACK;
2289 
2290  /* Do NOT use G_KEEPERR here */
2291  count = call_sv(desc->reference, G_SCALAR | G_EVAL);
2292 
2293  SPAGAIN;
2294 
2295  if (count != 1)
2296  {
2297  PUTBACK;
2298  FREETMPS;
2299  LEAVE;
2300  ereport(ERROR,
2301  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2302  errmsg("didn't get a return item from trigger function")));
2303  }
2304 
2305  if (SvTRUE(ERRSV))
2306  {
2307  (void) POPs;
2308  PUTBACK;
2309  FREETMPS;
2310  LEAVE;
2311  /* XXX need to find a way to determine a better errcode here */
2312  ereport(ERROR,
2313  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2315  }
2316 
2317  retval = newSVsv(POPs);
2318 
2319  PUTBACK;
2320  FREETMPS;
2321  LEAVE;
2322 
2323  return retval;
2324 }
2325 
2326 
2327 static void
2329  FunctionCallInfo fcinfo,
2330  SV *td)
2331 {
2332  dTHX;
2333  dSP;
2334  SV *retval,
2335  *TDsv;
2336  int count;
2337 
2338  ENTER;
2339  SAVETMPS;
2340 
2341  TDsv = get_sv("main::_TD", 0);
2342  if (!TDsv)
2343  ereport(ERROR,
2344  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2345  errmsg("couldn't fetch $_TD")));
2346 
2347  save_item(TDsv); /* local $_TD */
2348  sv_setsv(TDsv, td);
2349 
2350  PUSHMARK(sp);
2351  PUTBACK;
2352 
2353  /* Do NOT use G_KEEPERR here */
2354  count = call_sv(desc->reference, G_SCALAR | G_EVAL);
2355 
2356  SPAGAIN;
2357 
2358  if (count != 1)
2359  {
2360  PUTBACK;
2361  FREETMPS;
2362  LEAVE;
2363  ereport(ERROR,
2364  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2365  errmsg("didn't get a return item from trigger function")));
2366  }
2367 
2368  if (SvTRUE(ERRSV))
2369  {
2370  (void) POPs;
2371  PUTBACK;
2372  FREETMPS;
2373  LEAVE;
2374  /* XXX need to find a way to determine a better errcode here */
2375  ereport(ERROR,
2376  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2378  }
2379 
2380  retval = newSVsv(POPs);
2381  (void) retval; /* silence compiler warning */
2382 
2383  PUTBACK;
2384  FREETMPS;
2385  LEAVE;
2386 }
2387 
2388 static Datum
2390 {
2391  bool nonatomic;
2392  plperl_proc_desc *prodesc;
2393  SV *perlret;
2394  Datum retval = 0;
2395  ReturnSetInfo *rsi;
2396  ErrorContextCallback pl_error_context;
2397 
2398  nonatomic = fcinfo->context &&
2399  IsA(fcinfo->context, CallContext) &&
2400  !castNode(CallContext, fcinfo->context)->atomic;
2401 
2402  if (SPI_connect_ext(nonatomic ? SPI_OPT_NONATOMIC : 0) != SPI_OK_CONNECT)
2403  elog(ERROR, "could not connect to SPI manager");
2404 
2405  prodesc = compile_plperl_function(fcinfo->flinfo->fn_oid, false, false);
2406  current_call_data->prodesc = prodesc;
2407  increment_prodesc_refcount(prodesc);
2408 
2409  /* Set a callback for error reporting */
2410  pl_error_context.callback = plperl_exec_callback;
2411  pl_error_context.previous = error_context_stack;
2412  pl_error_context.arg = prodesc->proname;
2413  error_context_stack = &pl_error_context;
2414 
2415  rsi = (ReturnSetInfo *) fcinfo->resultinfo;
2416 
2417  if (prodesc->fn_retisset)
2418  {
2419  /* Check context before allowing the call to go through */
2420  if (!rsi || !IsA(rsi, ReturnSetInfo))
2421  ereport(ERROR,
2422  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2423  errmsg("set-valued function called in context that cannot accept a set")));
2424 
2425  if (!(rsi->allowedModes & SFRM_Materialize))
2426  ereport(ERROR,
2427  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2428  errmsg("materialize mode required, but it is not allowed in this context")));
2429  }
2430 
2431  activate_interpreter(prodesc->interp);
2432 
2433  perlret = plperl_call_perl_func(prodesc, fcinfo);
2434 
2435  /************************************************************
2436  * Disconnect from SPI manager and then create the return
2437  * values datum (if the input function does a palloc for it
2438  * this must not be allocated in the SPI memory context
2439  * because SPI_finish would free it).
2440  ************************************************************/
2441  if (SPI_finish() != SPI_OK_FINISH)
2442  elog(ERROR, "SPI_finish() failed");
2443 
2444  if (prodesc->fn_retisset)
2445  {
2446  SV *sav;
2447 
2448  /*
2449  * If the Perl function returned an arrayref, we pretend that it
2450  * called return_next() for each element of the array, to handle old
2451  * SRFs that didn't know about return_next(). Any other sort of return
2452  * value is an error, except undef which means return an empty set.
2453  */
2454  sav = get_perl_array_ref(perlret);
2455  if (sav)
2456  {
2457  dTHX;
2458  int i = 0;
2459  SV **svp = 0;
2460  AV *rav = (AV *) SvRV(sav);
2461 
2462  while ((svp = av_fetch(rav, i, FALSE)) != NULL)
2463  {
2465  i++;
2466  }
2467  }
2468  else if (SvOK(perlret))
2469  {
2470  ereport(ERROR,
2471  (errcode(ERRCODE_DATATYPE_MISMATCH),
2472  errmsg("set-returning PL/Perl function must return "
2473  "reference to array or use return_next")));
2474  }
2475 
2478  {
2481  }
2482  retval = (Datum) 0;
2483  }
2484  else if (prodesc->result_oid)
2485  {
2486  retval = plperl_sv_to_datum(perlret,
2487  prodesc->result_oid,
2488  -1,
2489  fcinfo,
2490  &prodesc->result_in_func,
2491  prodesc->result_typioparam,
2492  &fcinfo->isnull);
2493 
2494  if (fcinfo->isnull && rsi && IsA(rsi, ReturnSetInfo))
2495  rsi->isDone = ExprEndResult;
2496  }
2497 
2498  /* Restore the previous error callback */
2499  error_context_stack = pl_error_context.previous;
2500 
2501  SvREFCNT_dec_current(perlret);
2502 
2503  return retval;
2504 }
2505 
2506 
2507 static Datum
2509 {
2510  plperl_proc_desc *prodesc;
2511  SV *perlret;
2512  Datum retval;
2513  SV *svTD;
2514  HV *hvTD;
2515  ErrorContextCallback pl_error_context;
2516  TriggerData *tdata;
2517  int rc PG_USED_FOR_ASSERTS_ONLY;
2518 
2519  /* Connect to SPI manager */
2520  if (SPI_connect() != SPI_OK_CONNECT)
2521  elog(ERROR, "could not connect to SPI manager");
2522 
2523  /* Make transition tables visible to this SPI connection */
2524  tdata = (TriggerData *) fcinfo->context;
2525  rc = SPI_register_trigger_data(tdata);
2526  Assert(rc >= 0);
2527 
2528  /* Find or compile the function */
2529  prodesc = compile_plperl_function(fcinfo->flinfo->fn_oid, true, false);
2530  current_call_data->prodesc = prodesc;
2531  increment_prodesc_refcount(prodesc);
2532 
2533  /* Set a callback for error reporting */
2534  pl_error_context.callback = plperl_exec_callback;
2535  pl_error_context.previous = error_context_stack;
2536  pl_error_context.arg = prodesc->proname;
2537  error_context_stack = &pl_error_context;
2538 
2539  activate_interpreter(prodesc->interp);
2540 
2541  svTD = plperl_trigger_build_args(fcinfo);
2542  perlret = plperl_call_perl_trigger_func(prodesc, fcinfo, svTD);
2543  hvTD = (HV *) SvRV(svTD);
2544 
2545  /************************************************************
2546  * Disconnect from SPI manager and then create the return
2547  * values datum (if the input function does a palloc for it
2548  * this must not be allocated in the SPI memory context
2549  * because SPI_finish would free it).
2550  ************************************************************/
2551  if (SPI_finish() != SPI_OK_FINISH)
2552  elog(ERROR, "SPI_finish() failed");
2553 
2554  if (perlret == NULL || !SvOK(perlret))
2555  {
2556  /* undef result means go ahead with original tuple */
2557  TriggerData *trigdata = ((TriggerData *) fcinfo->context);
2558 
2559  if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
2560  retval = (Datum) trigdata->tg_trigtuple;
2561  else if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
2562  retval = (Datum) trigdata->tg_newtuple;
2563  else if (TRIGGER_FIRED_BY_DELETE(trigdata->tg_event))
2564  retval = (Datum) trigdata->tg_trigtuple;
2565  else if (TRIGGER_FIRED_BY_TRUNCATE(trigdata->tg_event))
2566  retval = (Datum) trigdata->tg_trigtuple;
2567  else
2568  retval = (Datum) 0; /* can this happen? */
2569  }
2570  else
2571  {
2572  HeapTuple trv;
2573  char *tmp;
2574 
2575  tmp = sv2cstr(perlret);
2576 
2577  if (pg_strcasecmp(tmp, "SKIP") == 0)
2578  trv = NULL;
2579  else if (pg_strcasecmp(tmp, "MODIFY") == 0)
2580  {
2581  TriggerData *trigdata = (TriggerData *) fcinfo->context;
2582 
2583  if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
2584  trv = plperl_modify_tuple(hvTD, trigdata,
2585  trigdata->tg_trigtuple);
2586  else if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
2587  trv = plperl_modify_tuple(hvTD, trigdata,
2588  trigdata->tg_newtuple);
2589  else
2590  {
2591  ereport(WARNING,
2592  (errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
2593  errmsg("ignoring modified row in DELETE trigger")));
2594  trv = NULL;
2595  }
2596  }
2597  else
2598  {
2599  ereport(ERROR,
2600  (errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
2601  errmsg("result of PL/Perl trigger function must be undef, "
2602  "\"SKIP\", or \"MODIFY\"")));
2603  trv = NULL;
2604  }
2605  retval = PointerGetDatum(trv);
2606  pfree(tmp);
2607  }
2608 
2609  /* Restore the previous error callback */
2610  error_context_stack = pl_error_context.previous;
2611 
2612  SvREFCNT_dec_current(svTD);
2613  if (perlret)
2614  SvREFCNT_dec_current(perlret);
2615 
2616  return retval;
2617 }
2618 
2619 
2620 static void
2622 {
2623  plperl_proc_desc *prodesc;
2624  SV *svTD;
2625  ErrorContextCallback pl_error_context;
2626 
2627  /* Connect to SPI manager */
2628  if (SPI_connect() != SPI_OK_CONNECT)
2629  elog(ERROR, "could not connect to SPI manager");
2630 
2631  /* Find or compile the function */
2632  prodesc = compile_plperl_function(fcinfo->flinfo->fn_oid, false, true);
2633  current_call_data->prodesc = prodesc;
2634  increment_prodesc_refcount(prodesc);
2635 
2636  /* Set a callback for error reporting */
2637  pl_error_context.callback = plperl_exec_callback;
2638  pl_error_context.previous = error_context_stack;
2639  pl_error_context.arg = prodesc->proname;
2640  error_context_stack = &pl_error_context;
2641 
2642  activate_interpreter(prodesc->interp);
2643 
2644  svTD = plperl_event_trigger_build_args(fcinfo);
2645  plperl_call_perl_event_trigger_func(prodesc, fcinfo, svTD);
2646 
2647  if (SPI_finish() != SPI_OK_FINISH)
2648  elog(ERROR, "SPI_finish() failed");
2649 
2650  /* Restore the previous error callback */
2651  error_context_stack = pl_error_context.previous;
2652 
2653  SvREFCNT_dec_current(svTD);
2654 }
2655 
2656 
2657 static bool
2659 {
2660  if (proc_ptr && proc_ptr->proc_ptr)
2661  {
2662  plperl_proc_desc *prodesc = proc_ptr->proc_ptr;
2663  bool uptodate;
2664 
2665  /************************************************************
2666  * If it's present, must check whether it's still up to date.
2667  * This is needed because CREATE OR REPLACE FUNCTION can modify the
2668  * function's pg_proc entry without changing its OID.
2669  ************************************************************/
2670  uptodate = (prodesc->fn_xmin == HeapTupleHeaderGetRawXmin(procTup->t_data) &&
2671  ItemPointerEquals(&prodesc->fn_tid, &procTup->t_self));
2672 
2673  if (uptodate)
2674  return true;
2675 
2676  /* Otherwise, unlink the obsoleted entry from the hashtable ... */
2677  proc_ptr->proc_ptr = NULL;
2678  /* ... and release the corresponding refcount, probably deleting it */
2679  decrement_prodesc_refcount(prodesc);
2680  }
2681 
2682  return false;
2683 }
2684 
2685 
2686 static void
2688 {
2689  Assert(prodesc->fn_refcount == 0);
2690  /* Release CODE reference, if we have one, from the appropriate interp */
2691  if (prodesc->reference)
2692  {
2694 
2695  activate_interpreter(prodesc->interp);
2696  SvREFCNT_dec_current(prodesc->reference);
2697  activate_interpreter(oldinterp);
2698  }
2699  /* Release all PG-owned data for this proc */
2700  MemoryContextDelete(prodesc->fn_cxt);
2701 }
2702 
2703 
2704 static plperl_proc_desc *
2705 compile_plperl_function(Oid fn_oid, bool is_trigger, bool is_event_trigger)
2706 {
2707  HeapTuple procTup;
2708  Form_pg_proc procStruct;
2709  plperl_proc_key proc_key;
2710  plperl_proc_ptr *proc_ptr;
2711  plperl_proc_desc *volatile prodesc = NULL;
2712  volatile MemoryContext proc_cxt = NULL;
2714  ErrorContextCallback plperl_error_context;
2715 
2716  /* We'll need the pg_proc tuple in any case... */
2717  procTup = SearchSysCache1(PROCOID, ObjectIdGetDatum(fn_oid));
2718  if (!HeapTupleIsValid(procTup))
2719  elog(ERROR, "cache lookup failed for function %u", fn_oid);
2720  procStruct = (Form_pg_proc) GETSTRUCT(procTup);
2721 
2722  /*
2723  * Try to find function in plperl_proc_hash. The reason for this
2724  * overcomplicated-seeming lookup procedure is that we don't know whether
2725  * it's plperl or plperlu, and don't want to spend a lookup in pg_language
2726  * to find out.
2727  */
2728  proc_key.proc_id = fn_oid;
2729  proc_key.is_trigger = is_trigger;
2730  proc_key.user_id = GetUserId();
2731  proc_ptr = hash_search(plperl_proc_hash, &proc_key,
2732  HASH_FIND, NULL);
2733  if (validate_plperl_function(proc_ptr, procTup))
2734  {
2735  /* Found valid plperl entry */
2736  ReleaseSysCache(procTup);
2737  return proc_ptr->proc_ptr;
2738  }
2739 
2740  /* If not found or obsolete, maybe it's plperlu */
2741  proc_key.user_id = InvalidOid;
2742  proc_ptr = hash_search(plperl_proc_hash, &proc_key,
2743  HASH_FIND, NULL);
2744  if (validate_plperl_function(proc_ptr, procTup))
2745  {
2746  /* Found valid plperlu entry */
2747  ReleaseSysCache(procTup);
2748  return proc_ptr->proc_ptr;
2749  }
2750 
2751  /************************************************************
2752  * If we haven't found it in the hashtable, we analyze
2753  * the function's arguments and return type and store
2754  * the in-/out-functions in the prodesc block,
2755  * then we load the procedure into the Perl interpreter,
2756  * and last we create a new hashtable entry for it.
2757  ************************************************************/
2758 
2759  /* Set a callback for reporting compilation errors */
2760  plperl_error_context.callback = plperl_compile_callback;
2761  plperl_error_context.previous = error_context_stack;
2762  plperl_error_context.arg = NameStr(procStruct->proname);
2763  error_context_stack = &plperl_error_context;
2764 
2765  PG_TRY();
2766  {
2767  HeapTuple langTup;
2768  HeapTuple typeTup;
2769  Form_pg_language langStruct;
2770  Form_pg_type typeStruct;
2771  Datum protrftypes_datum;
2772  Datum prosrcdatum;
2773  bool isnull;
2774  char *proc_source;
2775  MemoryContext oldcontext;
2776 
2777  /************************************************************
2778  * Allocate a context that will hold all PG data for the procedure.
2779  ************************************************************/
2781  "PL/Perl function",
2783 
2784  /************************************************************
2785  * Allocate and fill a new procedure description block.
2786  * struct prodesc and subsidiary data must all live in proc_cxt.
2787  ************************************************************/
2788  oldcontext = MemoryContextSwitchTo(proc_cxt);
2789  prodesc = (plperl_proc_desc *) palloc0(sizeof(plperl_proc_desc));
2790  prodesc->proname = pstrdup(NameStr(procStruct->proname));
2791  MemoryContextSetIdentifier(proc_cxt, prodesc->proname);
2792  prodesc->fn_cxt = proc_cxt;
2793  prodesc->fn_refcount = 0;
2794  prodesc->fn_xmin = HeapTupleHeaderGetRawXmin(procTup->t_data);
2795  prodesc->fn_tid = procTup->t_self;
2796  prodesc->nargs = procStruct->pronargs;
2797  prodesc->arg_out_func = (FmgrInfo *) palloc0(prodesc->nargs * sizeof(FmgrInfo));
2798  prodesc->arg_is_rowtype = (bool *) palloc0(prodesc->nargs * sizeof(bool));
2799  prodesc->arg_arraytype = (Oid *) palloc0(prodesc->nargs * sizeof(Oid));
2800  MemoryContextSwitchTo(oldcontext);
2801 
2802  /* Remember if function is STABLE/IMMUTABLE */
2803  prodesc->fn_readonly =
2804  (procStruct->provolatile != PROVOLATILE_VOLATILE);
2805 
2806  /* Fetch protrftypes */
2807  protrftypes_datum = SysCacheGetAttr(PROCOID, procTup,
2808  Anum_pg_proc_protrftypes, &isnull);
2809  MemoryContextSwitchTo(proc_cxt);
2810  prodesc->trftypes = isnull ? NIL : oid_array_to_list(protrftypes_datum);
2811  MemoryContextSwitchTo(oldcontext);
2812 
2813  /************************************************************
2814  * Lookup the pg_language tuple by Oid
2815  ************************************************************/
2816  langTup = SearchSysCache1(LANGOID,
2817  ObjectIdGetDatum(procStruct->prolang));
2818  if (!HeapTupleIsValid(langTup))
2819  elog(ERROR, "cache lookup failed for language %u",
2820  procStruct->prolang);
2821  langStruct = (Form_pg_language) GETSTRUCT(langTup);
2822  prodesc->lang_oid = langStruct->oid;
2823  prodesc->lanpltrusted = langStruct->lanpltrusted;
2824  ReleaseSysCache(langTup);
2825 
2826  /************************************************************
2827  * Get the required information for input conversion of the
2828  * return value.
2829  ************************************************************/
2830  if (!is_trigger && !is_event_trigger)
2831  {
2832  Oid rettype = procStruct->prorettype;
2833 
2834  typeTup = SearchSysCache1(TYPEOID, ObjectIdGetDatum(rettype));
2835  if (!HeapTupleIsValid(typeTup))
2836  elog(ERROR, "cache lookup failed for type %u", rettype);
2837  typeStruct = (Form_pg_type) GETSTRUCT(typeTup);
2838 
2839  /* Disallow pseudotype result, except VOID or RECORD */
2840  if (typeStruct->typtype == TYPTYPE_PSEUDO)
2841  {
2842  if (rettype == VOIDOID ||
2843  rettype == RECORDOID)
2844  /* okay */ ;
2845  else if (rettype == TRIGGEROID ||
2846  rettype == EVENT_TRIGGEROID)
2847  ereport(ERROR,
2848  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2849  errmsg("trigger functions can only be called "
2850  "as triggers")));
2851  else
2852  ereport(ERROR,
2853  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2854  errmsg("PL/Perl functions cannot return type %s",
2855  format_type_be(rettype))));
2856  }
2857 
2858  prodesc->result_oid = rettype;
2859  prodesc->fn_retisset = procStruct->proretset;
2860  prodesc->fn_retistuple = type_is_rowtype(rettype);
2861  prodesc->fn_retisarray = IsTrueArrayType(typeStruct);
2862 
2863  fmgr_info_cxt(typeStruct->typinput,
2864  &(prodesc->result_in_func),
2865  proc_cxt);
2866  prodesc->result_typioparam = getTypeIOParam(typeTup);
2867 
2868  ReleaseSysCache(typeTup);
2869  }
2870 
2871  /************************************************************
2872  * Get the required information for output conversion
2873  * of all procedure arguments
2874  ************************************************************/
2875  if (!is_trigger && !is_event_trigger)
2876  {
2877  int i;
2878 
2879  for (i = 0; i < prodesc->nargs; i++)
2880  {
2881  Oid argtype = procStruct->proargtypes.values[i];
2882 
2883  typeTup = SearchSysCache1(TYPEOID, ObjectIdGetDatum(argtype));
2884  if (!HeapTupleIsValid(typeTup))
2885  elog(ERROR, "cache lookup failed for type %u", argtype);
2886  typeStruct = (Form_pg_type) GETSTRUCT(typeTup);
2887 
2888  /* Disallow pseudotype argument, except RECORD */
2889  if (typeStruct->typtype == TYPTYPE_PSEUDO &&
2890  argtype != RECORDOID)
2891  ereport(ERROR,
2892  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2893  errmsg("PL/Perl functions cannot accept type %s",
2894  format_type_be(argtype))));
2895 
2896  if (type_is_rowtype(argtype))
2897  prodesc->arg_is_rowtype[i] = true;
2898  else
2899  {
2900  prodesc->arg_is_rowtype[i] = false;
2901  fmgr_info_cxt(typeStruct->typoutput,
2902  &(prodesc->arg_out_func[i]),
2903  proc_cxt);
2904  }
2905 
2906  /* Identify array-type arguments */
2907  if (IsTrueArrayType(typeStruct))
2908  prodesc->arg_arraytype[i] = argtype;
2909  else
2910  prodesc->arg_arraytype[i] = InvalidOid;
2911 
2912  ReleaseSysCache(typeTup);
2913  }
2914  }
2915 
2916  /************************************************************
2917  * create the text of the anonymous subroutine.
2918  * we do not use a named subroutine so that we can call directly
2919  * through the reference.
2920  ************************************************************/
2921  prosrcdatum = SysCacheGetAttr(PROCOID, procTup,
2922  Anum_pg_proc_prosrc, &isnull);
2923  if (isnull)
2924  elog(ERROR, "null prosrc");
2925  proc_source = TextDatumGetCString(prosrcdatum);
2926 
2927  /************************************************************
2928  * Create the procedure in the appropriate interpreter
2929  ************************************************************/
2930 
2932 
2933  prodesc->interp = plperl_active_interp;
2934 
2935  plperl_create_sub(prodesc, proc_source, fn_oid);
2936 
2937  activate_interpreter(oldinterp);
2938 
2939  pfree(proc_source);
2940 
2941  if (!prodesc->reference) /* can this happen? */
2942  elog(ERROR, "could not create PL/Perl internal procedure");
2943 
2944  /************************************************************
2945  * OK, link the procedure into the correct hashtable entry.
2946  * Note we assume that the hashtable entry either doesn't exist yet,
2947  * or we already cleared its proc_ptr during the validation attempts
2948  * above. So no need to decrement an old refcount here.
2949  ************************************************************/
2950  proc_key.user_id = prodesc->lanpltrusted ? GetUserId() : InvalidOid;
2951 
2952  proc_ptr = hash_search(plperl_proc_hash, &proc_key,
2953  HASH_ENTER, NULL);
2954  /* We assume these two steps can't throw an error: */
2955  proc_ptr->proc_ptr = prodesc;
2956  increment_prodesc_refcount(prodesc);
2957  }
2958  PG_CATCH();
2959  {
2960  /*
2961  * If we got as far as creating a reference, we should be able to use
2962  * free_plperl_function() to clean up. If not, then at most we have
2963  * some PG memory resources in proc_cxt, which we can just delete.
2964  */
2965  if (prodesc && prodesc->reference)
2966  free_plperl_function(prodesc);
2967  else if (proc_cxt)
2968  MemoryContextDelete(proc_cxt);
2969 
2970  /* Be sure to restore the previous interpreter, too, for luck */
2971  activate_interpreter(oldinterp);
2972 
2973  PG_RE_THROW();
2974  }
2975  PG_END_TRY();
2976 
2977  /* restore previous error callback */
2978  error_context_stack = plperl_error_context.previous;
2979 
2980  ReleaseSysCache(procTup);
2981 
2982  return prodesc;
2983 }
2984 
2985 /* Build a hash from a given composite/row datum */
2986 static SV *
2988 {
2989  HeapTupleHeader td;
2990  Oid tupType;
2991  int32 tupTypmod;
2992  TupleDesc tupdesc;
2993  HeapTupleData tmptup;
2994  SV *sv;
2995 
2996  td = DatumGetHeapTupleHeader(attr);
2997 
2998  /* Extract rowtype info and find a tupdesc */
2999  tupType = HeapTupleHeaderGetTypeId(td);
3000  tupTypmod = HeapTupleHeaderGetTypMod(td);
3001  tupdesc = lookup_rowtype_tupdesc(tupType, tupTypmod);
3002 
3003  /* Build a temporary HeapTuple control structure */
3004  tmptup.t_len = HeapTupleHeaderGetDatumLength(td);
3005  tmptup.t_data = td;
3006 
3007  sv = plperl_hash_from_tuple(&tmptup, tupdesc, true);
3008  ReleaseTupleDesc(tupdesc);
3009 
3010  return sv;
3011 }
3012 
3013 /* Build a hash from all attributes of a given tuple. */
3014 static SV *
3015 plperl_hash_from_tuple(HeapTuple tuple, TupleDesc tupdesc, bool include_generated)
3016 {
3017  dTHX;
3018  HV *hv;
3019  int i;
3020 
3021  /* since this function recurses, it could be driven to stack overflow */
3023 
3024  hv = newHV();
3025  hv_ksplit(hv, tupdesc->natts); /* pre-grow the hash */
3026 
3027  for (i = 0; i < tupdesc->natts; i++)
3028  {
3029  Datum attr;
3030  bool isnull,
3031  typisvarlena;
3032  char *attname;
3033  Oid typoutput;
3034  Form_pg_attribute att = TupleDescAttr(tupdesc, i);
3035 
3036  if (att->attisdropped)
3037  continue;
3038 
3039  if (att->attgenerated)
3040  {
3041  /* don't include unless requested */
3042  if (!include_generated)
3043  continue;
3044  }
3045 
3046  attname = NameStr(att->attname);
3047  attr = heap_getattr(tuple, i + 1, tupdesc, &isnull);
3048 
3049  if (isnull)
3050  {
3051  /*
3052  * Store (attname => undef) and move on. Note we can't use
3053  * &PL_sv_undef here; see "AVs, HVs and undefined values" in
3054  * perlguts for an explanation.
3055  */
3056  hv_store_string(hv, attname, newSV(0));
3057  continue;
3058  }
3059 
3060  if (type_is_rowtype(att->atttypid))
3061  {
3062  SV *sv = plperl_hash_from_datum(attr);
3063 
3064  hv_store_string(hv, attname, sv);
3065  }
3066  else
3067  {
3068  SV *sv;
3069  Oid funcid;
3070 
3071  if (OidIsValid(get_base_element_type(att->atttypid)))
3072  sv = plperl_ref_from_pg_array(attr, att->atttypid);
3074  sv = (SV *) DatumGetPointer(OidFunctionCall1(funcid, attr));
3075  else
3076  {
3077  char *outputstr;
3078 
3079  /* XXX should have a way to cache these lookups */
3080  getTypeOutputInfo(att->atttypid, &typoutput, &typisvarlena);
3081 
3082  outputstr = OidOutputFunctionCall(typoutput, attr);
3083  sv = cstr2sv(outputstr);
3084  pfree(outputstr);
3085  }
3086 
3087  hv_store_string(hv, attname, sv);
3088  }
3089  }
3090  return newRV_noinc((SV *) hv);
3091 }
3092 
3093 
3094 static void
3096 {
3097  /* see comment in plperl_fini() */
3098  if (plperl_ending)
3099  {
3100  /* simple croak as we don't want to involve PostgreSQL code */
3101  croak("SPI functions can not be used in END blocks");
3102  }
3103 
3104  /*
3105  * Disallow SPI usage if we're not executing a fully-compiled plperl
3106  * function. It might seem impossible to get here in that case, but there
3107  * are cases where Perl will try to execute code during compilation. If
3108  * we proceed we are likely to crash trying to dereference the prodesc
3109  * pointer. Working around that might be possible, but it seems unwise
3110  * because it'd allow code execution to happen while validating a
3111  * function, which is undesirable.
3112  */
3113  if (current_call_data == NULL || current_call_data->prodesc == NULL)
3114  {
3115  /* simple croak as we don't want to involve PostgreSQL code */
3116  croak("SPI functions can not be used during function compilation");
3117  }
3118 }
3119 
3120 
3121 HV *
3122 plperl_spi_exec(char *query, int limit)
3123 {
3124  HV *ret_hv;
3125 
3126  /*
3127  * Execute the query inside a sub-transaction, so we can cope with errors
3128  * sanely
3129  */
3130  MemoryContext oldcontext = CurrentMemoryContext;
3132 
3134 
3136  /* Want to run inside function's memory context */
3137  MemoryContextSwitchTo(oldcontext);
3138 
3139  PG_TRY();
3140  {
3141  int spi_rv;
3142 
3143  pg_verifymbstr(query, strlen(query), false);
3144 
3146  limit);
3148  spi_rv);
3149 
3150  /* Commit the inner transaction, return to outer xact context */
3152  MemoryContextSwitchTo(oldcontext);
3153  CurrentResourceOwner = oldowner;
3154  }
3155  PG_CATCH();
3156  {
3157  ErrorData *edata;
3158 
3159  /* Save error info */
3160  MemoryContextSwitchTo(oldcontext);
3161  edata = CopyErrorData();
3162  FlushErrorState();
3163 
3164  /* Abort the inner transaction */
3166  MemoryContextSwitchTo(oldcontext);
3167  CurrentResourceOwner = oldowner;
3168 
3169  /* Punt the error to Perl */
3170  croak_cstr(edata->message);
3171 
3172  /* Can't get here, but keep compiler quiet */
3173  return NULL;
3174  }
3175  PG_END_TRY();
3176 
3177  return ret_hv;
3178 }
3179 
3180 
3181 static HV *
3183  int status)
3184 {
3185  dTHX;
3186  HV *result;
3187 
3189 
3190  result = newHV();
3191 
3192  hv_store_string(result, "status",
3194  hv_store_string(result, "processed",
3195  (processed > (uint64) UV_MAX) ?
3196  newSVnv((NV) processed) :
3197  newSVuv((UV) processed));
3198 
3199  if (status > 0 && tuptable)
3200  {
3201  AV *rows;
3202  SV *row;
3203  uint64 i;
3204 
3205  /* Prevent overflow in call to av_extend() */
3206  if (processed > (uint64) AV_SIZE_MAX)
3207  ereport(ERROR,
3208  (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
3209  errmsg("query result has too many rows to fit in a Perl array")));
3210 
3211  rows = newAV();
3212  av_extend(rows, processed);
3213  for (i = 0; i < processed; i++)
3214  {
3215  row = plperl_hash_from_tuple(tuptable->vals[i], tuptable->tupdesc, true);
3216  av_push(rows, row);
3217  }
3218  hv_store_string(result, "rows",
3219  newRV_noinc((SV *) rows));
3220  }
3221 
3222  SPI_freetuptable(tuptable);
3223 
3224  return result;
3225 }
3226 
3227 
3228 /*
3229  * plperl_return_next catches any error and converts it to a Perl error.
3230  * We assume (perhaps without adequate justification) that we need not abort
3231  * the current transaction if the Perl code traps the error.
3232  */
3233 void
3235 {
3236  MemoryContext oldcontext = CurrentMemoryContext;
3237 
3239 
3240  PG_TRY();
3241  {
3243  }
3244  PG_CATCH();
3245  {
3246  ErrorData *edata;
3247 
3248  /* Must reset elog.c's state */
3249  MemoryContextSwitchTo(oldcontext);
3250  edata = CopyErrorData();
3251  FlushErrorState();
3252 
3253  /* Punt the error to Perl */
3254  croak_cstr(edata->message);
3255  }
3256  PG_END_TRY();
3257 }
3258 
3259 /*
3260  * plperl_return_next_internal reports any errors in Postgres fashion
3261  * (via ereport).
3262  */
3263 static void
3265 {
3266  plperl_proc_desc *prodesc;
3267  FunctionCallInfo fcinfo;
3268  ReturnSetInfo *rsi;
3269  MemoryContext old_cxt;
3270 
3271  if (!sv)
3272  return;
3273 
3274  prodesc = current_call_data->prodesc;
3275  fcinfo = current_call_data->fcinfo;
3276  rsi = (ReturnSetInfo *) fcinfo->resultinfo;
3277 
3278  if (!prodesc->fn_retisset)
3279  ereport(ERROR,
3280  (errcode(ERRCODE_SYNTAX_ERROR),
3281  errmsg("cannot use return_next in a non-SETOF function")));
3282 
3284  {
3285  TupleDesc tupdesc;
3286 
3288 
3289  /*
3290  * This is the first call to return_next in the current PL/Perl
3291  * function call, so identify the output tuple type and create a
3292  * tuplestore to hold the result rows.
3293  */
3294  if (prodesc->fn_retistuple)
3295  {
3296  TypeFuncClass funcclass;
3297  Oid typid;
3298 
3299  funcclass = get_call_result_type(fcinfo, &typid, &tupdesc);
3300  if (funcclass != TYPEFUNC_COMPOSITE &&
3301  funcclass != TYPEFUNC_COMPOSITE_DOMAIN)
3302  ereport(ERROR,
3303  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
3304  errmsg("function returning record called in context "
3305  "that cannot accept type record")));
3306  /* if domain-over-composite, remember the domain's type OID */
3307  if (funcclass == TYPEFUNC_COMPOSITE_DOMAIN)
3308  current_call_data->cdomain_oid = typid;
3309  }
3310  else
3311  {
3312  tupdesc = rsi->expectedDesc;
3313  /* Protect assumption below that we return exactly one column */
3314  if (tupdesc == NULL || tupdesc->natts != 1)
3315  elog(ERROR, "expected single-column result descriptor for non-composite SETOF result");
3316  }
3317 
3318  /*
3319  * Make sure the tuple_store and ret_tdesc are sufficiently
3320  * long-lived.
3321  */
3323 
3327  false, work_mem);
3328 
3329  MemoryContextSwitchTo(old_cxt);
3330  }
3331 
3332  /*
3333  * Producing the tuple we want to return requires making plenty of
3334  * palloc() allocations that are not cleaned up. Since this function can
3335  * be called many times before the current memory context is reset, we
3336  * need to do those allocations in a temporary context.
3337  */
3338  if (!current_call_data->tmp_cxt)
3339  {
3342  "PL/Perl return_next temporary cxt",
3344  }
3345 
3347 
3348  if (prodesc->fn_retistuple)
3349  {
3350  HeapTuple tuple;
3351 
3352  if (!(SvOK(sv) && SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVHV))
3353  ereport(ERROR,
3354  (errcode(ERRCODE_DATATYPE_MISMATCH),
3355  errmsg("SETOF-composite-returning PL/Perl function "
3356  "must call return_next with reference to hash")));
3357 
3358  tuple = plperl_build_tuple_result((HV *) SvRV(sv),
3360 
3362  domain_check(HeapTupleGetDatum(tuple), false,
3366 
3368  }
3369  else if (prodesc->result_oid)
3370  {
3371  Datum ret[1];
3372  bool isNull[1];
3373 
3374  ret[0] = plperl_sv_to_datum(sv,
3375  prodesc->result_oid,
3376  -1,
3377  fcinfo,
3378  &prodesc->result_in_func,
3379  prodesc->result_typioparam,
3380  &isNull[0]);
3381 
3384  ret, isNull);
3385  }
3386 
3387  MemoryContextSwitchTo(old_cxt);
3389 }
3390 
3391 
3392 SV *
3393 plperl_spi_query(char *query)
3394 {
3395  SV *cursor;
3396 
3397  /*
3398  * Execute the query inside a sub-transaction, so we can cope with errors
3399  * sanely
3400  */
3401  MemoryContext oldcontext = CurrentMemoryContext;
3403 
3405 
3407  /* Want to run inside function's memory context */
3408  MemoryContextSwitchTo(oldcontext);
3409 
3410  PG_TRY();
3411  {
3412  SPIPlanPtr plan;
3413  Portal portal;
3414 
3415  /* Make sure the query is validly encoded */
3416  pg_verifymbstr(query, strlen(query), false);
3417 
3418  /* Create a cursor for the query */
3419  plan = SPI_prepare(query, 0, NULL);
3420  if (plan == NULL)
3421  elog(ERROR, "SPI_prepare() failed:%s",
3423 
3424  portal = SPI_cursor_open(NULL, plan, NULL, NULL, false);
3425  SPI_freeplan(plan);
3426  if (portal == NULL)
3427  elog(ERROR, "SPI_cursor_open() failed:%s",
3429  cursor = cstr2sv(portal->name);
3430 
3431  PinPortal(portal);
3432 
3433  /* Commit the inner transaction, return to outer xact context */
3435  MemoryContextSwitchTo(oldcontext);
3436  CurrentResourceOwner = oldowner;
3437  }
3438  PG_CATCH();
3439  {
3440  ErrorData *edata;
3441 
3442  /* Save error info */
3443  MemoryContextSwitchTo(oldcontext);
3444  edata = CopyErrorData();
3445  FlushErrorState();
3446 
3447  /* Abort the inner transaction */
3449  MemoryContextSwitchTo(oldcontext);
3450  CurrentResourceOwner = oldowner;
3451 
3452  /* Punt the error to Perl */
3453  croak_cstr(edata->message);
3454 
3455  /* Can't get here, but keep compiler quiet */
3456  return NULL;
3457  }
3458  PG_END_TRY();
3459 
3460  return cursor;
3461 }
3462 
3463 
3464 SV *
3466 {
3467  SV *row;
3468 
3469  /*
3470  * Execute the FETCH inside a sub-transaction, so we can cope with errors
3471  * sanely
3472  */
3473  MemoryContext oldcontext = CurrentMemoryContext;
3475 
3477 
3479  /* Want to run inside function's memory context */
3480  MemoryContextSwitchTo(oldcontext);
3481 
3482  PG_TRY();
3483  {
3484  dTHX;
3486 
3487  if (!p)
3488  {
3489  row = &PL_sv_undef;
3490  }
3491  else
3492  {
3493  SPI_cursor_fetch(p, true, 1);
3494  if (SPI_processed == 0)
3495  {
3496  UnpinPortal(p);
3497  SPI_cursor_close(p);
3498  row = &PL_sv_undef;
3499  }
3500  else
3501  {
3504  true);
3505  }
3507  }
3508 
3509  /* Commit the inner transaction, return to outer xact context */
3511  MemoryContextSwitchTo(oldcontext);
3512  CurrentResourceOwner = oldowner;
3513  }
3514  PG_CATCH();
3515  {
3516  ErrorData *edata;
3517 
3518  /* Save error info */
3519  MemoryContextSwitchTo(oldcontext);
3520  edata = CopyErrorData();
3521  FlushErrorState();
3522 
3523  /* Abort the inner transaction */
3525  MemoryContextSwitchTo(oldcontext);
3526  CurrentResourceOwner = oldowner;
3527 
3528  /* Punt the error to Perl */
3529  croak_cstr(edata->message);
3530 
3531  /* Can't get here, but keep compiler quiet */
3532  return NULL;
3533  }
3534  PG_END_TRY();
3535 
3536  return row;
3537 }
3538 
3539 void
3541 {
3542  Portal p;
3543 
3545 
3546  p = SPI_cursor_find(cursor);
3547 
3548  if (p)
3549  {
3550  UnpinPortal(p);
3551  SPI_cursor_close(p);
3552  }
3553 }
3554 
3555 SV *
3556 plperl_spi_prepare(char *query, int argc, SV **argv)
3557 {
3558  volatile SPIPlanPtr plan = NULL;
3559  volatile MemoryContext plan_cxt = NULL;
3560  plperl_query_desc *volatile qdesc = NULL;
3561  plperl_query_entry *volatile hash_entry = NULL;
3562  MemoryContext oldcontext = CurrentMemoryContext;
3564  MemoryContext work_cxt;
3565  bool found;
3566  int i;
3567 
3569 
3571  MemoryContextSwitchTo(oldcontext);
3572 
3573  PG_TRY();
3574  {
3576 
3577  /************************************************************
3578  * Allocate the new querydesc structure
3579  *
3580  * The qdesc struct, as well as all its subsidiary data, lives in its
3581  * plan_cxt. But note that the SPIPlan does not.
3582  ************************************************************/
3584  "PL/Perl spi_prepare query",
3586  MemoryContextSwitchTo(plan_cxt);
3587  qdesc = (plperl_query_desc *) palloc0(sizeof(plperl_query_desc));
3588  snprintf(qdesc->qname, sizeof(qdesc->qname), "%p", qdesc);
3589  qdesc->plan_cxt = plan_cxt;
3590  qdesc->nargs = argc;
3591  qdesc->argtypes = (Oid *) palloc(argc * sizeof(Oid));
3592  qdesc->arginfuncs = (FmgrInfo *) palloc(argc * sizeof(FmgrInfo));
3593  qdesc->argtypioparams = (Oid *) palloc(argc * sizeof(Oid));
3594  MemoryContextSwitchTo(oldcontext);
3595 
3596  /************************************************************
3597  * Do the following work in a short-lived context so that we don't
3598  * leak a lot of memory in the PL/Perl function's SPI Proc context.
3599  ************************************************************/
3601  "PL/Perl spi_prepare workspace",
3603  MemoryContextSwitchTo(work_cxt);
3604 
3605  /************************************************************
3606  * Resolve argument type names and then look them up by oid
3607  * in the system cache, and remember the required information
3608  * for input conversion.
3609  ************************************************************/
3610  for (i = 0; i < argc; i++)
3611  {
3612  Oid typId,
3613  typInput,
3614  typIOParam;
3615  int32 typmod;
3616  char *typstr;
3617 
3618  typstr = sv2cstr(argv[i]);
3619  parseTypeString(typstr, &typId, &typmod, false);
3620  pfree(typstr);
3621 
3622  getTypeInputInfo(typId, &typInput, &typIOParam);
3623 
3624  qdesc->argtypes[i] = typId;
3625  fmgr_info_cxt(typInput, &(qdesc->arginfuncs[i]), plan_cxt);
3626  qdesc->argtypioparams[i] = typIOParam;
3627  }
3628 
3629  /* Make sure the query is validly encoded */
3630  pg_verifymbstr(query, strlen(query), false);
3631 
3632  /************************************************************
3633  * Prepare the plan and check for errors
3634  ************************************************************/
3635  plan = SPI_prepare(query, argc, qdesc->argtypes);
3636 
3637  if (plan == NULL)
3638  elog(ERROR, "SPI_prepare() failed:%s",
3640 
3641  /************************************************************
3642  * Save the plan into permanent memory (right now it's in the
3643  * SPI procCxt, which will go away at function end).
3644  ************************************************************/
3645  if (SPI_keepplan(plan))
3646  elog(ERROR, "SPI_keepplan() failed");
3647  qdesc->plan = plan;
3648 
3649  /************************************************************
3650  * Insert a hashtable entry for the plan.
3651  ************************************************************/
3653  qdesc->qname,
3654  HASH_ENTER, &found);
3655  hash_entry->query_data = qdesc;
3656 
3657  /* Get rid of workspace */
3658  MemoryContextDelete(work_cxt);
3659 
3660  /* Commit the inner transaction, return to outer xact context */
3662  MemoryContextSwitchTo(oldcontext);
3663  CurrentResourceOwner = oldowner;
3664  }
3665  PG_CATCH();
3666  {
3667  ErrorData *edata;
3668 
3669  /* Save error info */
3670  MemoryContextSwitchTo(oldcontext);
3671  edata = CopyErrorData();
3672  FlushErrorState();
3673 
3674  /* Drop anything we managed to allocate */
3675  if (hash_entry)
3677  qdesc->qname,
3678  HASH_REMOVE, NULL);
3679  if (plan_cxt)
3680  MemoryContextDelete(plan_cxt);
3681  if (plan)
3682  SPI_freeplan(plan);
3683 
3684  /* Abort the inner transaction */
3686  MemoryContextSwitchTo(oldcontext);
3687  CurrentResourceOwner = oldowner;
3688 
3689  /* Punt the error to Perl */
3690  croak_cstr(edata->message);
3691 
3692  /* Can't get here, but keep compiler quiet */
3693  return NULL;
3694  }
3695  PG_END_TRY();
3696 
3697  /************************************************************
3698  * Return the query's hash key to the caller.
3699  ************************************************************/
3700  return cstr2sv(qdesc->qname);
3701 }
3702 
3703 HV *
3704 plperl_spi_exec_prepared(char *query, HV *attr, int argc, SV **argv)
3705 {
3706  HV *ret_hv;
3707  SV **sv;
3708  int i,
3709  limit,
3710  spi_rv;
3711  char *nulls;
3712  Datum *argvalues;
3713  plperl_query_desc *qdesc;
3714  plperl_query_entry *hash_entry;
3715 
3716  /*
3717  * Execute the query inside a sub-transaction, so we can cope with errors
3718  * sanely
3719  */
3720  MemoryContext oldcontext = CurrentMemoryContext;
3722 
3724 
3726  /* Want to run inside function's memory context */
3727  MemoryContextSwitchTo(oldcontext);
3728 
3729  PG_TRY();
3730  {
3731  dTHX;
3732 
3733  /************************************************************
3734  * Fetch the saved plan descriptor, see if it's o.k.
3735  ************************************************************/
3736  hash_entry = hash_search(plperl_active_interp->query_hash, query,
3737  HASH_FIND, NULL);
3738  if (hash_entry == NULL)
3739  elog(ERROR, "spi_exec_prepared: Invalid prepared query passed");
3740 
3741  qdesc = hash_entry->query_data;
3742  if (qdesc == NULL)
3743  elog(ERROR, "spi_exec_prepared: plperl query_hash value vanished");
3744 
3745  if (qdesc->nargs != argc)
3746  elog(ERROR, "spi_exec_prepared: expected %d argument(s), %d passed",
3747  qdesc->nargs, argc);
3748 
3749  /************************************************************
3750  * Parse eventual attributes
3751  ************************************************************/
3752  limit = 0;
3753  if (attr != NULL)
3754  {
3755  sv = hv_fetch_string(attr, "limit");
3756  if (sv && *sv && SvIOK(*sv))
3757  limit = SvIV(*sv);
3758  }
3759  /************************************************************
3760  * Set up arguments
3761  ************************************************************/
3762  if (argc > 0)
3763  {
3764  nulls = (char *) palloc(argc);
3765  argvalues = (Datum *) palloc(argc * sizeof(Datum));
3766  }
3767  else
3768  {
3769  nulls = NULL;
3770  argvalues = NULL;
3771  }
3772 
3773  for (i = 0; i < argc; i++)
3774  {
3775  bool isnull;
3776 
3777  argvalues[i] = plperl_sv_to_datum(argv[i],
3778  qdesc->argtypes[i],
3779  -1,
3780  NULL,
3781  &qdesc->arginfuncs[i],
3782  qdesc->argtypioparams[i],
3783  &isnull);
3784  nulls[i] = isnull ? 'n' : ' ';
3785  }
3786 
3787  /************************************************************
3788  * go
3789  ************************************************************/
3790  spi_rv = SPI_execute_plan(qdesc->plan, argvalues, nulls,
3793  spi_rv);
3794  if (argc > 0)
3795  {
3796  pfree(argvalues);
3797  pfree(nulls);
3798  }
3799 
3800  /* Commit the inner transaction, return to outer xact context */
3802  MemoryContextSwitchTo(oldcontext);
3803  CurrentResourceOwner = oldowner;
3804  }
3805  PG_CATCH();
3806  {
3807  ErrorData *edata;
3808 
3809  /* Save error info */
3810  MemoryContextSwitchTo(oldcontext);
3811  edata = CopyErrorData();
3812  FlushErrorState();
3813 
3814  /* Abort the inner transaction */
3816  MemoryContextSwitchTo(oldcontext);
3817  CurrentResourceOwner = oldowner;
3818 
3819  /* Punt the error to Perl */
3820  croak_cstr(edata->message);
3821 
3822  /* Can't get here, but keep compiler quiet */
3823  return NULL;
3824  }
3825  PG_END_TRY();
3826 
3827  return ret_hv;
3828 }
3829 
3830 SV *
3831 plperl_spi_query_prepared(char *query, int argc, SV **argv)
3832 {
3833  int i;
3834  char *nulls;
3835  Datum *argvalues;
3836  plperl_query_desc *qdesc;
3837  plperl_query_entry *hash_entry;
3838  SV *cursor;
3839  Portal portal = NULL;
3840 
3841  /*
3842  * Execute the query inside a sub-transaction, so we can cope with errors
3843  * sanely
3844  */
3845  MemoryContext oldcontext = CurrentMemoryContext;
3847 
3849 
3851  /* Want to run inside function's memory context */
3852  MemoryContextSwitchTo(oldcontext);
3853 
3854  PG_TRY();
3855  {
3856  /************************************************************
3857  * Fetch the saved plan descriptor, see if it's o.k.
3858  ************************************************************/
3859  hash_entry = hash_search(plperl_active_interp->query_hash, query,
3860  HASH_FIND, NULL);
3861  if (hash_entry == NULL)
3862  elog(ERROR, "spi_query_prepared: Invalid prepared query passed");
3863 
3864  qdesc = hash_entry->query_data;
3865  if (qdesc == NULL)
3866  elog(ERROR, "spi_query_prepared: plperl query_hash value vanished");
3867 
3868  if (qdesc->nargs != argc)
3869  elog(ERROR, "spi_query_prepared: expected %d argument(s), %d passed",
3870  qdesc->nargs, argc);
3871 
3872  /************************************************************
3873  * Set up arguments
3874  ************************************************************/
3875  if (argc > 0)
3876  {
3877  nulls = (char *) palloc(argc);
3878  argvalues = (Datum *) palloc(argc * sizeof(Datum));
3879  }
3880  else
3881  {
3882  nulls = NULL;
3883  argvalues = NULL;
3884  }
3885 
3886  for (i = 0; i < argc; i++)
3887  {
3888  bool isnull;
3889 
3890  argvalues[i] = plperl_sv_to_datum(argv[i],
3891  qdesc->argtypes[i],
3892  -1,
3893  NULL,
3894  &qdesc->arginfuncs[i],
3895  qdesc->argtypioparams[i],
3896  &isnull);
3897  nulls[i] = isnull ? 'n' : ' ';
3898  }
3899 
3900  /************************************************************
3901  * go
3902  ************************************************************/
3903  portal = SPI_cursor_open(NULL, qdesc->plan, argvalues, nulls,
3905  if (argc > 0)
3906  {
3907  pfree(argvalues);
3908  pfree(nulls);
3909  }
3910  if (portal == NULL)
3911  elog(ERROR, "SPI_cursor_open() failed:%s",
3913 
3914  cursor = cstr2sv(portal->name);
3915 
3916  PinPortal(portal);
3917 
3918  /* Commit the inner transaction, return to outer xact context */
3920  MemoryContextSwitchTo(oldcontext);
3921  CurrentResourceOwner = oldowner;
3922  }
3923  PG_CATCH();
3924  {
3925  ErrorData *edata;
3926 
3927  /* Save error info */
3928  MemoryContextSwitchTo(oldcontext);
3929  edata = CopyErrorData();
3930  FlushErrorState();
3931 
3932  /* Abort the inner transaction */
3934  MemoryContextSwitchTo(oldcontext);
3935  CurrentResourceOwner = oldowner;
3936 
3937  /* Punt the error to Perl */
3938  croak_cstr(edata->message);
3939 
3940  /* Can't get here, but keep compiler quiet */
3941  return NULL;
3942  }
3943  PG_END_TRY();
3944 
3945  return cursor;
3946 }
3947 
3948 void
3950 {
3951  SPIPlanPtr plan;
3952  plperl_query_desc *qdesc;
3953  plperl_query_entry *hash_entry;
3954 
3956 
3957  hash_entry = hash_search(plperl_active_interp->query_hash, query,
3958  HASH_FIND, NULL);
3959  if (hash_entry == NULL)
3960  elog(ERROR, "spi_freeplan: Invalid prepared query passed");
3961 
3962  qdesc = hash_entry->query_data;
3963  if (qdesc == NULL)
3964  elog(ERROR, "spi_freeplan: plperl query_hash value vanished");
3965  plan = qdesc->plan;
3966 
3967  /*
3968  * free all memory before SPI_freeplan, so if it dies, nothing will be
3969  * left over
3970  */
3972  HASH_REMOVE, NULL);
3973 
3974  MemoryContextDelete(qdesc->plan_cxt);
3975 
3976  SPI_freeplan(plan);
3977 }
3978 
3979 void
3981 {
3982  MemoryContext oldcontext = CurrentMemoryContext;
3983 
3985 
3986  PG_TRY();
3987  {
3988  SPI_commit();
3989  }
3990  PG_CATCH();
3991  {
3992  ErrorData *edata;
3993 
3994  /* Save error info */
3995  MemoryContextSwitchTo(oldcontext);
3996  edata = CopyErrorData();
3997  FlushErrorState();
3998 
3999  /* Punt the error to Perl */
4000  croak_cstr(edata->message);
4001  }
4002  PG_END_TRY();
4003 }
4004 
4005 void
4007 {
4008  MemoryContext oldcontext = CurrentMemoryContext;
4009 
4011 
4012  PG_TRY();
4013  {
4014  SPI_rollback();
4015  }
4016  PG_CATCH();
4017  {
4018  ErrorData *edata;
4019 
4020  /* Save error info */
4021  MemoryContextSwitchTo(oldcontext);
4022  edata = CopyErrorData();
4023  FlushErrorState();
4024 
4025  /* Punt the error to Perl */
4026  croak_cstr(edata->message);
4027  }
4028  PG_END_TRY();
4029 }
4030 
4031 /*
4032  * Implementation of plperl's elog() function
4033  *
4034  * If the error level is less than ERROR, we'll just emit the message and
4035  * return. When it is ERROR, elog() will longjmp, which we catch and
4036  * turn into a Perl croak(). Note we are assuming that elog() can't have
4037  * any internal failures that are so bad as to require a transaction abort.
4038  *
4039  * The main reason this is out-of-line is to avoid conflicts between XSUB.h
4040  * and the PG_TRY macros.
4041  */
4042 void
4043 plperl_util_elog(int level, SV *msg)
4044 {
4045  MemoryContext oldcontext = CurrentMemoryContext;
4046  char *volatile cmsg = NULL;
4047 
4048  /*
4049  * We intentionally omit check_spi_usage_allowed() here, as this seems
4050  * safe to allow even in the contexts that that function rejects.
4051  */
4052 
4053  PG_TRY();
4054  {
4055  cmsg = sv2cstr(msg);
4056  elog(level, "%s", cmsg);
4057  pfree(cmsg);
4058  }
4059  PG_CATCH();
4060  {
4061  ErrorData *edata;
4062 
4063  /* Must reset elog.c's state */
4064  MemoryContextSwitchTo(oldcontext);
4065  edata = CopyErrorData();
4066  FlushErrorState();
4067 
4068  if (cmsg)
4069  pfree(cmsg);
4070 
4071  /* Punt the error to Perl */
4072  croak_cstr(edata->message);
4073  }
4074  PG_END_TRY();
4075 }
4076 
4077 /*
4078  * Store an SV into a hash table under a key that is a string assumed to be
4079  * in the current database's encoding.
4080  */
4081 static SV **
4082 hv_store_string(HV *hv, const char *key, SV *val)
4083 {
4084  dTHX;
4085  int32 hlen;
4086  char *hkey;
4087  SV **ret;
4088 
4089  hkey = pg_server_to_any(key, strlen(key), PG_UTF8);
4090 
4091  /*
4092  * hv_store() recognizes a negative klen parameter as meaning a UTF-8
4093  * encoded key.
4094  */
4095  hlen = -(int) strlen(hkey);
4096  ret = hv_store(hv, hkey, hlen, val, 0);
4097 
4098  if (hkey != key)
4099  pfree(hkey);
4100 
4101  return ret;
4102 }
4103 
4104 /*
4105  * Fetch an SV from a hash table under a key that is a string assumed to be
4106  * in the current database's encoding.
4107  */
4108 static SV **
4109 hv_fetch_string(HV *hv, const char *key)
4110 {
4111  dTHX;
4112  int32 hlen;
4113  char *hkey;
4114  SV **ret;
4115 
4116  hkey = pg_server_to_any(key, strlen(key), PG_UTF8);
4117 
4118  /* See notes in hv_store_string */
4119  hlen = -(int) strlen(hkey);
4120  ret = hv_fetch(hv, hkey, hlen, 0);
4121 
4122  if (hkey != key)
4123  pfree(hkey);
4124 
4125  return ret;
4126 }
4127 
4128 /*
4129  * Provide function name for PL/Perl execution errors
4130  */
4131 static void
4133 {
4134  char *procname = (char *) arg;
4135 
4136  if (procname)
4137  errcontext("PL/Perl function \"%s\"", procname);
4138 }
4139 
4140 /*
4141  * Provide function name for PL/Perl compilation errors
4142  */
4143 static void
4145 {
4146  char *procname = (char *) arg;
4147 
4148  if (procname)
4149  errcontext("compilation of PL/Perl function \"%s\"", procname);
4150 }
4151 
4152 /*
4153  * Provide error context for the inline handler
4154  */
4155 static void
4157 {
4158  errcontext("PL/Perl anonymous code block");
4159 }
4160 
4161 
4162 /*
4163  * Perl's own setlocale(), copied from POSIX.xs
4164  * (needed because of the calls to new_*())
4165  *
4166  * Starting in 5.28, perl exposes Perl_setlocale to do so.
4167  */
4168 #if defined(WIN32) && PERL_VERSION_LT(5, 28, 0)
4169 static char *
4170 setlocale_perl(int category, char *locale)
4171 {
4172  dTHX;
4173  char *RETVAL = setlocale(category, locale);
4174 
4175  if (RETVAL)
4176  {
4177 #ifdef USE_LOCALE_CTYPE
4178  if (category == LC_CTYPE
4179 #ifdef LC_ALL
4180  || category == LC_ALL
4181 #endif
4182  )
4183  {
4184  char *newctype;
4185 
4186 #ifdef LC_ALL
4187  if (category == LC_ALL)
4188  newctype = setlocale(LC_CTYPE, NULL);
4189  else
4190 #endif
4191  newctype = RETVAL;
4192  new_ctype(newctype);
4193  }
4194 #endif /* USE_LOCALE_CTYPE */
4195 #ifdef USE_LOCALE_COLLATE
4196  if (category == LC_COLLATE
4197 #ifdef LC_ALL
4198  || category == LC_ALL
4199 #endif
4200  )
4201  {
4202  char *newcoll;
4203 
4204 #ifdef LC_ALL
4205  if (category == LC_ALL)
4206  newcoll = setlocale(LC_COLLATE, NULL);
4207  else
4208 #endif
4209  newcoll = RETVAL;
4210  new_collate(newcoll);
4211  }
4212 #endif /* USE_LOCALE_COLLATE */
4213 
4214 #ifdef USE_LOCALE_NUMERIC
4215  if (category == LC_NUMERIC
4216 #ifdef LC_ALL
4217  || category == LC_ALL
4218 #endif
4219  )
4220  {
4221  char *newnum;
4222 
4223 #ifdef LC_ALL
4224  if (category == LC_ALL)
4225  newnum = setlocale(LC_NUMERIC, NULL);
4226  else
4227 #endif
4228  newnum = RETVAL;
4229  new_numeric(newnum);
4230  }
4231 #endif /* USE_LOCALE_NUMERIC */
4232  }
4233 
4234  return RETVAL;
4235 }
4236 #endif /* defined(WIN32) && PERL_VERSION_LT(5, 28, 0) */
#define ARR_NDIM(a)
Definition: array.h:283
#define MAXDIM
Definition: array.h:75
#define DatumGetArrayTypeP(X)
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#define ARR_ELEMTYPE(a)
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#define ARR_DIMS(a)
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ArrayBuildState * accumArrayResult(ArrayBuildState *astate, Datum dvalue, bool disnull, Oid element_type, MemoryContext rcontext)
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ArrayBuildState * initArrayResult(Oid element_type, MemoryContext rcontext, bool subcontext)
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Datum makeMdArrayResult(ArrayBuildState *astate, int ndims, int *dims, int *lbs, MemoryContext rcontext, bool release)
Definition: arrayfuncs.c:5219
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const char * GetCommandTagName(CommandTag commandTag)
Definition: cmdtag.c:45
void domain_check(Datum value, bool isnull, Oid domainType, void **extra, MemoryContext mcxt)
Definition: domains.c:327
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Definition: dynahash.c:954
HTAB * hash_create(const char *tabname, long nelem, const HASHCTL *info, int flags)
Definition: dynahash.c:349
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Definition: dynahash.c:1426
ErrorContextCallback * error_context_stack
Definition: elog.c:93
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Definition: elog.c:1649
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Definition: elog.c:693
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Definition: elog.c:904
ErrorData * CopyErrorData(void)
Definition: elog.c:1555
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Definition: elog.h:340
#define errcontext
Definition: elog.h:190
#define PG_END_TRY()
Definition: elog.h:324
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Definition: elog.h:22
#define PG_TRY()
Definition: elog.h:299
#define WARNING
Definition: elog.h:30
#define PG_FINALLY()
Definition: elog.h:316
#define ERROR
Definition: elog.h:33
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Definition: elog.h:218
#define PG_CATCH()
Definition: elog.h:309
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const char * name
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Definition: event_trigger.h:41
@ ExprEndResult
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@ SFRM_Materialize_Random
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@ SFRM_Materialize
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bool CheckFunctionValidatorAccess(Oid validatorOid, Oid functionOid)
Definition: fmgr.c:2021
Datum InputFunctionCall(FmgrInfo *flinfo, char *str, Oid typioparam, int32 typmod)
Definition: fmgr.c:1515
void fmgr_info(Oid functionId, FmgrInfo *finfo)
Definition: fmgr.c:126
void fmgr_info_cxt(Oid functionId, FmgrInfo *finfo, MemoryContext mcxt)
Definition: fmgr.c:136
char * OidOutputFunctionCall(Oid functionId, Datum val)
Definition: fmgr.c:1639
char * OutputFunctionCall(FmgrInfo *flinfo, Datum val)
Definition: fmgr.c:1559
#define PG_RETURN_VOID()
Definition: fmgr.h:349
#define OidFunctionCall1(functionId, arg1)
Definition: fmgr.h:669
#define PG_GETARG_OID(n)
Definition: fmgr.h:275
#define DatumGetHeapTupleHeader(X)
Definition: fmgr.h:295
#define PG_GETARG_POINTER(n)
Definition: fmgr.h:276
#define SizeForFunctionCallInfo(nargs)
Definition: fmgr.h:102
#define DirectFunctionCall1(func, arg1)
Definition: fmgr.h:631
#define LOCAL_FCINFO(name, nargs)
Definition: fmgr.h:110
#define FunctionCall1(flinfo, arg1)
Definition: fmgr.h:649
#define PG_FUNCTION_ARGS
Definition: fmgr.h:193
char * format_type_be(Oid type_oid)
Definition: format_type.c:343
int get_func_arg_info(HeapTuple procTup, Oid **p_argtypes, char ***p_argnames, char **p_argmodes)
Definition: funcapi.c:1337
TypeFuncClass get_call_result_type(FunctionCallInfo fcinfo, Oid *resultTypeId, TupleDesc *resultTupleDesc)
Definition: funcapi.c:276
TypeFuncClass
Definition: funcapi.h:147
@ TYPEFUNC_COMPOSITE
Definition: funcapi.h:149
@ TYPEFUNC_COMPOSITE_DOMAIN
Definition: funcapi.h:150
@ TYPEFUNC_OTHER
Definition: funcapi.h:152
#define HeapTupleGetDatum(tuple)
Definition: funcapi.h:220
int work_mem
Definition: globals.c:125
bool check_function_bodies
Definition: guc.c:626
void DefineCustomStringVariable(const char *name, const char *short_desc, const char *long_desc, char **valueAddr, const char *bootValue, GucContext context, int flags, GucStringCheckHook check_hook, GucStringAssignHook assign_hook, GucShowHook show_hook)
Definition: guc.c:9562
void DefineCustomBoolVariable(const char *name, const char *short_desc, const char *long_desc, bool *valueAddr, bool bootValue, GucContext context, int flags, GucBoolCheckHook check_hook, GucBoolAssignHook assign_hook, GucShowHook show_hook)
Definition: guc.c:9476
void MarkGUCPrefixReserved(const char *className)
Definition: guc.c:9623
@ PGC_SUSET
Definition: guc.h:75
@ PGC_USERSET
Definition: guc.h:76
@ PGC_SIGHUP
Definition: guc.h:72
HeapTuple heap_form_tuple(TupleDesc tupleDescriptor, Datum *values, bool *isnull)
Definition: heaptuple.c:1020
HeapTuple heap_modify_tuple(HeapTuple tuple, TupleDesc tupleDesc, Datum *replValues, bool *replIsnull, bool *doReplace)
Definition: heaptuple.c:1113
#define HASH_STRINGS
Definition: hsearch.h:96
@ HASH_FIND
Definition: hsearch.h:113
@ HASH_REMOVE
Definition: hsearch.h:115
@ HASH_ENTER
Definition: hsearch.h:114
#define HASH_ELEM
Definition: hsearch.h:95
#define HASH_BLOBS
Definition: hsearch.h:97
#define HeapTupleIsValid(tuple)
Definition: htup.h:78
static Datum heap_getattr(HeapTuple tup, int attnum, TupleDesc tupleDesc, bool *isnull)
Definition: htup_details.h:788
#define HeapTupleHeaderGetTypMod(tup)
Definition: htup_details.h:462
#define HeapTupleHeaderGetTypeId(tup)
Definition: htup_details.h:452
#define HeapTupleHeaderGetDatumLength(tup)
Definition: htup_details.h:446
#define HeapTupleHeaderGetRawXmin(tup)
Definition: htup_details.h:303
#define GETSTRUCT(TUP)
Definition: htup_details.h:649
long val
Definition: informix.c:664
static char * locale
Definition: initdb.c:128
void on_proc_exit(pg_on_exit_callback function, Datum arg)
Definition: ipc.c:305
int x
Definition: isn.c:71
int i
Definition: isn.c:73
bool ItemPointerEquals(ItemPointer pointer1, ItemPointer pointer2)
Definition: itemptr.c:29
Assert(fmt[strlen(fmt) - 1] !='\n')
Oid get_element_type(Oid typid)
Definition: lsyscache.c:2716
bool type_is_rowtype(Oid typid)
Definition: lsyscache.c:2612
void getTypeOutputInfo(Oid type, Oid *typOutput, bool *typIsVarlena)
Definition: lsyscache.c:2864
Oid get_func_signature(Oid funcid, Oid **argtypes, int *nargs)
Definition: lsyscache.c:1677
void getTypeInputInfo(Oid type, Oid *typInput, Oid *typIOParam)
Definition: lsyscache.c:2831
Oid get_transform_tosql(Oid typid, Oid langid, List *trftypes)
Definition: lsyscache.c:2100
void get_type_io_data(Oid typid, IOFuncSelector which_func, int16 *typlen, bool *typbyval, char *typalign, char *typdelim, Oid *typioparam, Oid *func)
Definition: lsyscache.c:2282
char get_typtype(Oid typid)
Definition: lsyscache.c:2586
Oid get_base_element_type(Oid typid)
Definition: lsyscache.c:2789
Oid getTypeIOParam(HeapTuple typeTuple)
Definition: lsyscache.c:2260
Oid get_transform_fromsql(Oid typid, Oid langid, List *trftypes)
Definition: lsyscache.c:2079
@ IOFunc_output
Definition: lsyscache.h:36
bool pg_verifymbstr(const char *mbstr, int len, bool noError)
Definition: mbutils.c:1505
char * pg_server_to_any(const char *s, int len, int encoding)
Definition: mbutils.c:749
void MemoryContextReset(MemoryContext context)
Definition: mcxt.c:143
char * pstrdup(const char *in)
Definition: mcxt.c:1305
void pfree(void *pointer)
Definition: mcxt.c:1175
MemoryContext TopMemoryContext
Definition: mcxt.c:48
void * palloc0(Size size)
Definition: mcxt.c:1099
MemoryContext CurrentMemoryContext
Definition: mcxt.c:42
void MemoryContextDelete(MemoryContext context)
Definition: mcxt.c:218
void * palloc(Size size)
Definition: mcxt.c:1068
void MemoryContextSetIdentifier(MemoryContext context, const char *id)
Definition: mcxt.c:336
#define AllocSetContextCreate
Definition: memutils.h:173
#define ALLOCSET_DEFAULT_SIZES
Definition: memutils.h:197
#define ALLOCSET_SMALL_SIZES
Definition: memutils.h:207
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:121
Oid GetUserId(void)
Definition: miscinit.c:492
void pg_bindtextdomain(const char *domain)
Definition: miscinit.c:1720
#define IsA(nodeptr, _type_)
Definition: nodes.h:624
#define castNode(_type_, nodeptr)
Definition: nodes.h:642
Datum oidout(PG_FUNCTION_ARGS)
Definition: oid.c:127
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:109
void parseTypeString(const char *str, Oid *typeid_p, int32 *typmod_p, bool missing_ok)
Definition: parse_type.c:782
NameData attname
Definition: pg_attribute.h:41
FormData_pg_attribute * Form_pg_attribute
Definition: pg_attribute.h:207
void * arg
#define NAMEDATALEN
const void size_t len
FormData_pg_language * Form_pg_language
Definition: pg_language.h:65
#define NIL
Definition: pg_list.h:65
List * oid_array_to_list(Datum datum)
Definition: pg_proc.c:1188
FormData_pg_proc * Form_pg_proc
Definition: pg_proc.h:136
static void static void status(const char *fmt,...) pg_attribute_printf(1
Definition: pg_regress.c:229
NameData subname
char typalign
Definition: pg_type.h:176
FormData_pg_type * Form_pg_type
Definition: pg_type.h:261
@ PG_UTF8
Definition: pg_wchar.h:230
static HTAB * plperl_interp_hash
Definition: plperl.c:225
static SV * plperl_call_perl_func(plperl_proc_desc *desc, FunctionCallInfo fcinfo)
Definition: plperl.c:2167
struct plperl_call_data plperl_call_data
static char plperl_opmask[MAXO]
Definition: plperl.c:240
static void plperl_event_trigger_handler(PG_FUNCTION_ARGS)
Definition: plperl.c:2621
static bool plperl_use_strict
Definition: plperl.c:233
static void _sv_to_datum_finfo(Oid typid, FmgrInfo *finfo, Oid *typioparam)
Definition: plperl.c:1287
static Datum plperl_func_handler(PG_FUNCTION_ARGS)
Definition: plperl.c:2389
struct plperl_proc_key plperl_proc_key
SV * plperl_spi_query(char *query)
Definition: plperl.c:3393
static HTAB * plperl_proc_hash
Definition: plperl.c:226
static void set_interp_require(bool trusted)
Definition: plperl.c:493
static bool plperl_ending
Definition: plperl.c:238
static void SvREFCNT_dec_current(SV *sv)
Definition: plperl.c:315
void plperl_return_next(SV *sv)
Definition: plperl.c:3234
void _PG_init(void)
Definition: plperl.c:383
static SV * plperl_hash_from_tuple(HeapTuple tuple, TupleDesc tupdesc, bool include_generated)
Definition: plperl.c:3015
struct plperl_query_desc plperl_query_desc
SV * plperl_spi_query_prepared(char *query, int argc, SV **argv)
Definition: plperl.c:3831
static plperl_interp_desc * plperl_active_interp
Definition: plperl.c:227
Datum plperlu_call_handler(PG_FUNCTION_ARGS)
Definition: plperl.c:2054
static PerlInterpreter * plperl_held_interp
Definition: plperl.c:230
static HV * plperl_spi_execute_fetch_result(SPITupleTable *, uint64, int)
Definition: plperl.c:3182
static void plperl_trusted_init(void)
Definition: plperl.c:960
static SV * make_array_ref(plperl_array_info *info, int first, int last)
Definition: plperl.c:1580
HV * plperl_spi_exec(char *query, int limit)
Definition: plperl.c:3122
void plperl_spi_rollback(void)
Definition: plperl.c:4006
Datum plperl_inline_handler(PG_FUNCTION_ARGS)
Definition: plperl.c:1881
static HeapTuple plperl_build_tuple_result(HV *perlhash, TupleDesc td)
Definition: plperl.c:1078
struct plperl_proc_desc plperl_proc_desc
PG_MODULE_MAGIC
Definition: plperl.c:58
static void plperl_untrusted_init(void)
Definition: plperl.c:1041
SV * plperl_spi_fetchrow(char *cursor)
Definition: plperl.c:3465
static void plperl_create_sub(plperl_proc_desc *desc, const char *s, Oid fn_oid)
Definition: plperl.c:2082
Datum plperl_validator(PG_FUNCTION_ARGS)
Definition: plperl.c:1976
static void plperl_init_shared_libs(pTHX)
Definition: plperl.c:2155
#define increment_prodesc_refcount(prodesc)
Definition: plperl.c:129
static char * hek2cstr(HE *he)
Definition: plperl.c:326
static void plperl_destroy_interp(PerlInterpreter **)
Definition: plperl.c:921
EXTERN_C void boot_DynaLoader(pTHX_ CV *cv)
static char * strip_trailing_ws(const char *msg)
Definition: plperl.c:1064
static OP * pp_require_safe(pTHX)
Definition: plperl.c:883
HV * plperl_spi_exec_prepared(char *query, HV *attr, int argc, SV **argv)
Definition: plperl.c:3704
#define setlocale_perl(a, b)
Definition: plperl.c:305
struct plperl_array_info plperl_array_info
char * plperl_sv_to_literal(SV *sv, char *fqtypename)
Definition: plperl.c:1431
static void free_plperl_function(plperl_proc_desc *prodesc)
Definition: plperl.c:2687
EXTERN_C void boot_PostgreSQL__InServer__Util(pTHX_ CV *cv)
static SV * plperl_event_trigger_build_args(FunctionCallInfo fcinfo)
Definition: plperl.c:1731
static void check_spi_usage_allowed(void)
Definition: plperl.c:3095
static SV * plperl_trigger_build_args(FunctionCallInfo fcinfo)
Definition: plperl.c:1618
PG_FUNCTION_INFO_V1(plperl_call_handler)
SV * plperl_spi_prepare(char *query, int argc, SV **argv)
Definition: plperl.c:3556
static SV * plperl_hash_from_datum(Datum attr)
Definition: plperl.c:2987
static void select_perl_context(bool trusted)
Definition: plperl.c:556
static Datum plperl_sv_to_datum(SV *sv, Oid typid, int32 typmod, FunctionCallInfo fcinfo, FmgrInfo *finfo, Oid typioparam, bool *isnull)
Definition: plperl.c:1310
struct plperl_query_entry plperl_query_entry
static void plperl_fini(int code, Datum arg)
Definition: plperl.c:512
static void plperl_exec_callback(void *arg)
Definition: plperl.c:4132
#define TEXTDOMAIN
Definition: plperl.c:44
static void plperl_inline_callback(void *arg)
Definition: plperl.c:4156
static SV * get_perl_array_ref(SV *sv)
Definition: plperl.c:1141
static SV * plperl_call_perl_trigger_func(plperl_proc_desc *desc, FunctionCallInfo fcinfo, SV *td)
Definition: plperl.c:2260
static SV ** hv_fetch_string(HV *hv, const char *key)
Definition: plperl.c:4109
#define decrement_prodesc_refcount(prodesc)
Definition: plperl.c:131
Datum plperlu_inline_handler(PG_FUNCTION_ARGS)
Definition: plperl.c:2062
static void plperl_compile_callback(void *arg)
Definition: plperl.c:4144
Datum plperlu_validator(PG_FUNCTION_ARGS)
Definition: plperl.c:2070
void plperl_spi_freeplan(char *query)
Definition: plperl.c:3949
static SV * plperl_ref_from_pg_array(Datum arg, Oid typid)
Definition: plperl.c:1467
static Datum plperl_array_to_datum(SV *src, Oid typid, int32 typmod)
Definition: plperl.c:1243
static char * plperl_on_init
Definition: plperl.c:234
static char * plperl_on_plperl_init
Definition: plperl.c:235
static SV * split_array(plperl_array_info *info, int first, int last, int nest)
Definition: plperl.c:1546
static Datum plperl_trigger_handler(PG_FUNCTION_ARGS)
Definition: plperl.c:2508
Datum plperl_call_handler(PG_FUNCTION_ARGS)
Definition: plperl.c:1839
static SV ** hv_store_string(HV *hv, const char *key, SV *val)
Definition: plperl.c:4082
static plperl_call_data * current_call_data
Definition: plperl.c:243
void plperl_util_elog(int level, SV *msg)
Definition: plperl.c:4043
void plperl_spi_cursor_close(char *cursor)
Definition: plperl.c:3540
static plperl_proc_desc * compile_plperl_function(Oid fn_oid, bool is_trigger, bool is_event_trigger)
Definition: plperl.c:2705
static OP *(* pp_require_orig)(pTHX)
Definition: plperl.c:239
static HeapTuple plperl_modify_tuple(HV *hvTD, TriggerData *tdata, HeapTuple otup)
Definition: plperl.c:1749
static void plperl_return_next_internal(SV *sv)
Definition: plperl.c:3264
struct plperl_proc_ptr plperl_proc_ptr
struct plperl_interp_desc plperl_interp_desc
static bool validate_plperl_function(plperl_proc_ptr *proc_ptr, HeapTuple procTup)
Definition: plperl.c:2658
static void plperl_call_perl_event_trigger_func(plperl_proc_desc *desc, FunctionCallInfo fcinfo, SV *td)
Definition: plperl.c:2328
static PerlInterpreter * plperl_init_interp(void)
Definition: plperl.c:708
EXTERN_C void boot_PostgreSQL__InServer__SPI(pTHX_ CV *cv)
static char * plperl_on_plperlu_init
Definition: plperl.c:236
static Datum plperl_hash_to_datum(SV *src, TupleDesc td)
Definition: plperl.c:1129
static void array_to_datum_internal(AV *av, ArrayBuildState *astate, int *ndims, int *dims, int cur_depth, Oid arraytypid, Oid elemtypid, int32 typmod, FmgrInfo *finfo, Oid typioparam)
Definition: plperl.c:1168
void plperl_spi_commit(void)
Definition: plperl.c:3980
static void activate_interpreter(plperl_interp_desc *interp_desc)
Definition: plperl.c:687
#define GvCV_set(gv, cv)
Definition: plperl.h:191
#define AV_SIZE_MAX
Definition: plperl.h:198
#define HeUTF8(he)
Definition: plperl.h:184
static SV * cstr2sv(const char *str)
static void croak_cstr(const char *str)
static char * sv2cstr(SV *sv)
int pg_strcasecmp(const char *s1, const char *s2)
Definition: pgstrcasecmp.c:36
#define sprintf
Definition: port.h:227
#define snprintf
Definition: port.h:225
void PinPortal(Portal portal)
Definition: portalmem.c:372
void UnpinPortal(Portal portal)
Definition: portalmem.c:381
void FloatExceptionHandler(SIGNAL_ARGS)
Definition: postgres.c:2983
void check_stack_depth(void)
Definition: postgres.c:3500
#define CStringGetDatum(X)
Definition: postgres.h:622
uintptr_t Datum
Definition: postgres.h:411
#define DatumGetPointer(X)
Definition: postgres.h:593
#define ObjectIdGetDatum(X)
Definition: postgres.h:551
#define DatumGetCString(X)
Definition: postgres.h:610
#define PointerGetDatum(X)
Definition: postgres.h:600
#define InvalidOid
Definition: postgres_ext.h:36
unsigned int Oid
Definition: postgres_ext.h:31
NVTYPE NV
Definition: ppport.h:12325
#define pTHX
Definition: ppport.h:11317
#define PERL_UNUSED_VAR(x)
Definition: ppport.h:12293
#define call_sv
Definition: ppport.h:15060
#define get_sv
Definition: ppport.h:12463
#define newSVuv(uv)
Definition: ppport.h:14511
#define newRV_noinc(sv)
Definition: ppport.h:15247
#define ERRSV
Definition: ppport.h:12444
#define newRV_inc(sv)
Definition: ppport.h:15240
#define dTHX
Definition: ppport.h:11306
#define call_pv
Definition: ppport.h:14998
#define aTHX_
Definition: ppport.h:11333
#define isGV_with_GP(gv)
Definition: ppport.h:15703
#define PL_ppaddr
Definition: ppport.h:11735
#define PL_sv_no
Definition: ppport.h:11779
#define EXTERN_C
Definition: ppport.h:12379
#define UV_MAX
Definition: ppport.h:11685
#define dVAR
Definition: ppport.h:12519
#define pTHX_
Definition: ppport.h:11321
#define PL_sv_undef
Definition: ppport.h:11780
Datum regtypein(PG_FUNCTION_ARGS)
Definition: regproc.c:1251
ResourceOwner CurrentResourceOwner
Definition: resowner.c:146
struct @10::@11 av[32]
pqsigfunc pqsignal(int signum, pqsigfunc handler)
Definition: signal.c:180
void SPI_commit(void)
Definition: spi.c:321
char * SPI_getrelname(Relation rel)
Definition: spi.c:1324
int SPI_fnumber(TupleDesc tupdesc, const char *fname)
Definition: spi.c:1173
uint64 SPI_processed
Definition: spi.c:45
int SPI_freeplan(SPIPlanPtr plan)
Definition: spi.c:1023
SPITupleTable * SPI_tuptable
Definition: spi.c:46
Portal SPI_cursor_find(const char *name)
Definition: spi.c:1792
int SPI_connect(void)
Definition: spi.c:95
int SPI_result
Definition: spi.c:47
const char * SPI_result_code_string(int code)
Definition: spi.c:1970
void SPI_cursor_fetch(Portal portal, bool forward, long count)
Definition: spi.c:1804
int SPI_finish(void)
Definition: spi.c:183
int SPI_execute_plan(SPIPlanPtr plan, Datum *Values, const char *Nulls, bool read_only, long tcount)
Definition: spi.c:670
int SPI_register_trigger_data(TriggerData *tdata)
Definition: spi.c:3336
void SPI_freetuptable(SPITupleTable *tuptable)
Definition: spi.c:1384
Portal SPI_cursor_open(const char *name, SPIPlanPtr plan, Datum *Values, const char *Nulls, bool read_only)
Definition: spi.c:1443
SPIPlanPtr SPI_prepare(const char *src, int nargs, Oid *argtypes)
Definition: spi.c:858
int SPI_keepplan(SPIPlanPtr plan)
Definition: spi.c:974
void SPI_cursor_close(Portal portal)
Definition: spi.c:1860
char * SPI_getnspname(Relation rel)
Definition: spi.c:1330
int SPI_connect_ext(int options)
Definition: spi.c:101
void SPI_rollback(void)
Definition: spi.c:414
int SPI_execute(const char *src, bool read_only, long tcount)
Definition: spi.c:594
#define SPI_OPT_NONATOMIC
Definition: spi.h:101
#define SPI_ERROR_NOATTRIBUTE
Definition: spi.h:76
#define SPI_OK_CONNECT
Definition: spi.h:82
#define SPI_OK_FINISH
Definition: spi.h:83
struct ErrorContextCallback * previous
Definition: elog.h:232
void(* callback)(void *arg)
Definition: elog.h:233
char * message
Definition: elog.h:368
CommandTag tag
Definition: event_trigger.h:29
const char * event
Definition: event_trigger.h:27
MemoryContext ecxt_per_query_memory
Definition: execnodes.h:239
Definition: fmgr.h:57
MemoryContext fn_mcxt
Definition: fmgr.h:65
Oid fn_oid
Definition: fmgr.h:59
fmNodePtr resultinfo
Definition: fmgr.h:89
FmgrInfo * flinfo
Definition: fmgr.h:87
fmNodePtr context
Definition: fmgr.h:88
NullableDatum args[FLEXIBLE_ARRAY_MEMBER]
Definition: fmgr.h:95
Size keysize
Definition: hsearch.h:75
Size entrysize
Definition: hsearch.h:76
Definition: dynahash.c:220
ItemPointerData t_self
Definition: htup.h:65
uint32 t_len
Definition: htup.h:64
HeapTupleHeader t_data
Definition: htup.h:68
char * source_text
Definition: parsenodes.h:3369
Definition: pg_list.h:51
Datum value
Definition: postgres.h:422
const char * name
Definition: portal.h:118
TupleDesc rd_att
Definition: rel.h:110
Oid rd_id
Definition: rel.h:111
SetFunctionReturnMode returnMode
Definition: execnodes.h:313
ExprContext * econtext
Definition: execnodes.h:309
TupleDesc setDesc
Definition: execnodes.h:317
Tuplestorestate * setResult
Definition: execnodes.h:316
TupleDesc expectedDesc
Definition: execnodes.h:310
int allowedModes
Definition: execnodes.h:311
ExprDoneCond isDone
Definition: execnodes.h:314
TupleDesc tupdesc
Definition: spi.h:25
HeapTuple * vals
Definition: spi.h:26
Relation tg_relation
Definition: trigger.h:35
TriggerEvent tg_event
Definition: trigger.h:34
HeapTuple tg_newtuple
Definition: trigger.h:37
Trigger * tg_trigger
Definition: trigger.h:38
HeapTuple tg_trigtuple
Definition: trigger.h:36
char * tgname
Definition: reltrigger.h:27
int16 tgnargs
Definition: reltrigger.h:38
char ** tgargs
Definition: reltrigger.h:41
Oid tdtypeid
Definition: tupdesc.h:82
Definition: type.h:131
bool elem_is_rowtype
Definition: plperl.c:213
bool * nulls
Definition: plperl.c:215
FmgrInfo transform_proc
Definition: plperl.c:218
FmgrInfo proc
Definition: plperl.c:217
Datum * elements
Definition: plperl.c:214
FunctionCallInfo fcinfo
Definition: plperl.c:176
void * cdomain_info
Definition: plperl.c:181
plperl_proc_desc * prodesc
Definition: plperl.c:175
TupleDesc ret_tdesc
Definition: plperl.c:179
MemoryContext tmp_cxt
Definition: plperl.c:182
Tuplestorestate * tuple_store
Definition: plperl.c:178
PerlInterpreter * interp
Definition: plperl.c:88
HTAB * query_hash
Definition: plperl.c:89
char * proname
Definition: plperl.c:104
FmgrInfo result_in_func
Definition: plperl.c:120
bool fn_readonly
Definition: plperl.c:111
unsigned long fn_refcount
Definition: plperl.c:106
MemoryContext fn_cxt
Definition: plperl.c:105
bool fn_retisarray
Definition: plperl.c:117
FmgrInfo * arg_out_func
Definition: plperl.c:124
Oid * arg_arraytype
Definition: plperl.c:126
ItemPointerData fn_tid
Definition: plperl.c:108
plperl_interp_desc * interp
Definition: plperl.c:110
bool fn_retistuple
Definition: plperl.c:115
SV * reference
Definition: plperl.c:109
TransactionId fn_xmin
Definition: plperl.c:107
bool * arg_is_rowtype
Definition: plperl.c:125
Oid result_typioparam
Definition: plperl.c:121
bool fn_retisset
Definition: plperl.c:116
List * trftypes
Definition: plperl.c:113
bool lanpltrusted
Definition: plperl.c:114
Oid is_trigger
Definition: plperl.c:159
plperl_proc_key proc_key
Definition: plperl.c:165
plperl_proc_desc * proc_ptr
Definition: plperl.c:166
char qname[24]
Definition: plperl.c:190
MemoryContext plan_cxt
Definition: plperl.c:191
FmgrInfo * arginfuncs
Definition: plperl.c:195
Oid * argtypes
Definition: plperl.c:194
SPIPlanPtr plan
Definition: plperl.c:192
Oid * argtypioparams
Definition: plperl.c:196
Definition: plperl.c:202
char query_name[NAMEDATALEN]
Definition: plperl.c:203
plperl_query_desc * query_data
Definition: plperl.c:204
Definition: type.h:83
void ReleaseSysCache(HeapTuple tuple)
Definition: syscache.c:1221
HeapTuple SearchSysCache1(int cacheId, Datum key1)
Definition: syscache.c:1173
Datum SysCacheGetAttr(int cacheId, HeapTuple tup, AttrNumber attributeNumber, bool *isNull)
Definition: syscache.c:1434
@ TYPEOID
Definition: syscache.h:114
@ PROCOID
Definition: syscache.h:79
@ LANGOID
Definition: syscache.h:68
#define TRIGGER_FIRED_FOR_STATEMENT(event)
Definition: trigger.h:125
#define TRIGGER_FIRED_BY_DELETE(event)
Definition: trigger.h:113
#define TRIGGER_FIRED_BEFORE(event)
Definition: trigger.h:128
#define CALLED_AS_TRIGGER(fcinfo)
Definition: trigger.h:26
#define TRIGGER_FIRED_FOR_ROW(event)
Definition: trigger.h:122
#define TRIGGER_FIRED_AFTER(event)
Definition: trigger.h:131
#define TRIGGER_FIRED_BY_TRUNCATE(event)
Definition: trigger.h:119
#define TRIGGER_FIRED_BY_INSERT(event)
Definition: trigger.h:110
#define TRIGGER_FIRED_BY_UPDATE(event)
Definition: trigger.h:116
#define TRIGGER_FIRED_INSTEAD(event)
Definition: trigger.h:134
TupleDesc CreateTupleDescCopy(TupleDesc tupdesc)
Definition: tupdesc.c:111
#define ReleaseTupleDesc(tupdesc)
Definition: tupdesc.h:122
#define TupleDescAttr(tupdesc, i)
Definition: tupdesc.h:92
void tuplestore_putvalues(Tuplestorestate *state, TupleDesc tdesc, Datum *values, bool *isnull)
Definition: tuplestore.c:750
Tuplestorestate * tuplestore_begin_heap(bool randomAccess, bool interXact, int maxKBytes)
Definition: tuplestore.c:318
void tuplestore_puttuple(Tuplestorestate *state, HeapTuple tuple)
Definition: tuplestore.c:730
TupleDesc lookup_rowtype_tupdesc(Oid type_id, int32 typmod)
Definition: typcache.c:1830
TupleDesc lookup_rowtype_tupdesc_domain(Oid type_id, int32 typmod, bool noError)
Definition: typcache.c:1886
#define setlocale(a, b)
Definition: win32_port.h:446
void BeginInternalSubTransaction(const char *name)
Definition: xact.c:4490
void RollbackAndReleaseCurrentSubTransaction(void)
Definition: xact.c:4595
void ReleaseCurrentSubTransaction(void)
Definition: xact.c:4561