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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 "miscadmin.h"
27 #include "nodes/makefuncs.h"
28 #include "parser/parse_type.h"
29 #include "storage/ipc.h"
30 #include "tcop/tcopprot.h"
31 #include "utils/builtins.h"
32 #include "utils/fmgroids.h"
33 #include "utils/guc.h"
34 #include "utils/hsearch.h"
35 #include "utils/lsyscache.h"
36 #include "utils/memutils.h"
37 #include "utils/rel.h"
38 #include "utils/syscache.h"
39 #include "utils/typcache.h"
40 
41 /* define our text domain for translations */
42 #undef TEXTDOMAIN
43 #define TEXTDOMAIN PG_TEXTDOMAIN("plperl")
44 
45 /* perl stuff */
46 /* string literal macros defining chunks of perl code */
47 #include "perlchunks.h"
48 #include "plperl.h"
49 /* defines PLPERL_SET_OPMASK */
50 #include "plperl_opmask.h"
51 
55 
57 
58 /**********************************************************************
59  * Information associated with a Perl interpreter. We have one interpreter
60  * that is used for all plperlu (untrusted) functions. For plperl (trusted)
61  * functions, there is a separate interpreter for each effective SQL userid.
62  * (This is needed to ensure that an unprivileged user can't inject Perl code
63  * that'll be executed with the privileges of some other SQL user.)
64  *
65  * The plperl_interp_desc structs are kept in a Postgres hash table indexed
66  * by userid OID, with OID 0 used for the single untrusted interpreter.
67  * Once created, an interpreter is kept for the life of the process.
68  *
69  * We start out by creating a "held" interpreter, which we initialize
70  * only as far as we can do without deciding if it will be trusted or
71  * untrusted. Later, when we first need to run a plperl or plperlu
72  * function, we complete the initialization appropriately and move the
73  * PerlInterpreter pointer into the plperl_interp_hash hashtable. If after
74  * that we need more interpreters, we create them as needed if we can, or
75  * fail if the Perl build doesn't support multiple interpreters.
76  *
77  * The reason for all the dancing about with a held interpreter is to make
78  * it possible for people to preload a lot of Perl code at postmaster startup
79  * (using plperl.on_init) and then use that code in backends. Of course this
80  * will only work for the first interpreter created in any backend, but it's
81  * still useful with that restriction.
82  **********************************************************************/
83 typedef struct plperl_interp_desc
84 {
85  Oid user_id; /* Hash key (must be first!) */
86  PerlInterpreter *interp; /* The interpreter */
87  HTAB *query_hash; /* plperl_query_entry structs */
89 
90 
91 /**********************************************************************
92  * The information we cache about loaded procedures
93  *
94  * The fn_refcount field counts the struct's reference from the hash table
95  * shown below, plus one reference for each function call level that is using
96  * the struct. We can release the struct, and the associated Perl sub, when
97  * the fn_refcount goes to zero. Releasing the struct itself is done by
98  * deleting the fn_cxt, which also gets rid of all subsidiary data.
99  **********************************************************************/
100 typedef struct plperl_proc_desc
101 {
102  char *proname; /* user name of procedure */
103  MemoryContext fn_cxt; /* memory context for this procedure */
104  unsigned long fn_refcount; /* number of active references */
105  TransactionId fn_xmin; /* xmin/TID of procedure's pg_proc tuple */
107  SV *reference; /* CODE reference for Perl sub */
108  plperl_interp_desc *interp; /* interpreter it's created in */
109  bool fn_readonly; /* is function readonly (not volatile)? */
112  bool lanpltrusted; /* is it plperl, rather than plperlu? */
113  bool fn_retistuple; /* true, if function returns tuple */
114  bool fn_retisset; /* true, if function returns set */
115  bool fn_retisarray; /* true if function returns array */
116  /* Conversion info for function's result type: */
117  Oid result_oid; /* Oid of result type */
118  FmgrInfo result_in_func; /* I/O function and arg for result type */
120  /* Per-argument info for function's argument types: */
121  int nargs;
122  FmgrInfo *arg_out_func; /* output fns for arg types */
123  bool *arg_is_rowtype; /* is each arg composite? */
124  Oid *arg_arraytype; /* InvalidOid if not an array */
126 
127 #define increment_prodesc_refcount(prodesc) \
128  ((prodesc)->fn_refcount++)
129 #define decrement_prodesc_refcount(prodesc) \
130  do { \
131  Assert((prodesc)->fn_refcount > 0); \
132  if (--((prodesc)->fn_refcount) == 0) \
133  free_plperl_function(prodesc); \
134  } while(0)
135 
136 /**********************************************************************
137  * For speedy lookup, we maintain a hash table mapping from
138  * function OID + trigger flag + user OID to plperl_proc_desc pointers.
139  * The reason the plperl_proc_desc struct isn't directly part of the hash
140  * entry is to simplify recovery from errors during compile_plperl_function.
141  *
142  * Note: if the same function is called by multiple userIDs within a session,
143  * there will be a separate plperl_proc_desc entry for each userID in the case
144  * of plperl functions, but only one entry for plperlu functions, because we
145  * set user_id = 0 for that case. If the user redeclares the same function
146  * from plperl to plperlu or vice versa, there might be multiple
147  * plperl_proc_ptr entries in the hashtable, but only one is valid.
148  **********************************************************************/
149 typedef struct plperl_proc_key
150 {
151  Oid proc_id; /* Function OID */
152 
153  /*
154  * is_trigger is really a bool, but declare as Oid to ensure this struct
155  * contains no padding
156  */
157  Oid is_trigger; /* is it a trigger function? */
158  Oid user_id; /* User calling the function, or 0 */
160 
161 typedef struct plperl_proc_ptr
162 {
163  plperl_proc_key proc_key; /* Hash key (must be first!) */
166 
167 /*
168  * The information we cache for the duration of a single call to a
169  * function.
170  */
171 typedef struct plperl_call_data
172 {
175  /* remaining fields are used only in a function returning set: */
178  Oid cdomain_oid; /* 0 unless returning domain-over-composite */
182 
183 /**********************************************************************
184  * The information we cache about prepared and saved plans
185  **********************************************************************/
186 typedef struct plperl_query_desc
187 {
188  char qname[24];
189  MemoryContext plan_cxt; /* context holding this struct */
191  int nargs;
196 
197 /* hash table entry for query desc */
198 
199 typedef struct plperl_query_entry
200 {
204 
205 /**********************************************************************
206  * Information for PostgreSQL - Perl array conversion.
207  **********************************************************************/
208 typedef struct plperl_array_info
209 {
210  int ndims;
211  bool elem_is_rowtype; /* 't' if element type is a rowtype */
213  bool *nulls;
214  int *nelems;
218 
219 /**********************************************************************
220  * Global data
221  **********************************************************************/
222 
223 static HTAB *plperl_interp_hash = NULL;
224 static HTAB *plperl_proc_hash = NULL;
226 
227 /* If we have an unassigned "held" interpreter, it's stored here */
228 static PerlInterpreter *plperl_held_interp = NULL;
229 
230 /* GUC variables */
231 static bool plperl_use_strict = false;
232 static char *plperl_on_init = NULL;
233 static char *plperl_on_plperl_init = NULL;
234 static char *plperl_on_plperlu_init = NULL;
235 
236 static bool plperl_ending = false;
237 static OP *(*pp_require_orig) (pTHX) = NULL;
238 static char plperl_opmask[MAXO];
239 
240 /* this is saved and restored by plperl_call_handler */
242 
243 /**********************************************************************
244  * Forward declarations
245  **********************************************************************/
246 
247 static PerlInterpreter *plperl_init_interp(void);
248 static void plperl_destroy_interp(PerlInterpreter **);
249 static void plperl_fini(int code, Datum arg);
250 static void set_interp_require(bool trusted);
251 
255 
256 static void free_plperl_function(plperl_proc_desc *prodesc);
257 
259  bool is_trigger,
260  bool is_event_trigger);
261 
262 static SV *plperl_hash_from_tuple(HeapTuple tuple, TupleDesc tupdesc, bool include_generated);
263 static SV *plperl_hash_from_datum(Datum attr);
264 static void check_spi_usage_allowed(void);
265 static SV *plperl_ref_from_pg_array(Datum arg, Oid typid);
266 static SV *split_array(plperl_array_info *info, int first, int last, int nest);
267 static SV *make_array_ref(plperl_array_info *info, int first, int last);
268 static SV *get_perl_array_ref(SV *sv);
269 static Datum plperl_sv_to_datum(SV *sv, Oid typid, int32 typmod,
270  FunctionCallInfo fcinfo,
271  FmgrInfo *finfo, Oid typioparam,
272  bool *isnull);
273 static void _sv_to_datum_finfo(Oid typid, FmgrInfo *finfo, Oid *typioparam);
274 static Datum plperl_array_to_datum(SV *src, Oid typid, int32 typmod);
275 static void array_to_datum_internal(AV *av, ArrayBuildState **astatep,
276  int *ndims, int *dims, int cur_depth,
277  Oid elemtypid, int32 typmod,
278  FmgrInfo *finfo, Oid typioparam);
279 static Datum plperl_hash_to_datum(SV *src, TupleDesc td);
280 
281 static void plperl_init_shared_libs(pTHX);
282 static void plperl_trusted_init(void);
283 static void plperl_untrusted_init(void);
284 static HV *plperl_spi_execute_fetch_result(SPITupleTable *, uint64, int);
285 static void plperl_return_next_internal(SV *sv);
286 static char *hek2cstr(HE *he);
287 static SV **hv_store_string(HV *hv, const char *key, SV *val);
288 static SV **hv_fetch_string(HV *hv, const char *key);
289 static void plperl_create_sub(plperl_proc_desc *desc, const char *s, Oid fn_oid);
290 static SV *plperl_call_perl_func(plperl_proc_desc *desc,
291  FunctionCallInfo fcinfo);
292 static void plperl_compile_callback(void *arg);
293 static void plperl_exec_callback(void *arg);
294 static void plperl_inline_callback(void *arg);
295 static char *strip_trailing_ws(const char *msg);
296 static OP *pp_require_safe(pTHX);
297 static void activate_interpreter(plperl_interp_desc *interp_desc);
298 
299 #if defined(WIN32) && PERL_VERSION_LT(5, 28, 0)
300 static char *setlocale_perl(int category, char *locale);
301 #else
302 #define setlocale_perl(a,b) Perl_setlocale(a,b)
303 #endif /* defined(WIN32) && PERL_VERSION_LT(5, 28, 0) */
304 
305 /*
306  * Decrement the refcount of the given SV within the active Perl interpreter
307  *
308  * This is handy because it reloads the active-interpreter pointer, saving
309  * some notation in callers that switch the active interpreter.
310  */
311 static inline void
313 {
314  dTHX;
315 
316  SvREFCNT_dec(sv);
317 }
318 
319 /*
320  * convert a HE (hash entry) key to a cstr in the current database encoding
321  */
322 static char *
323 hek2cstr(HE *he)
324 {
325  dTHX;
326  char *ret;
327  SV *sv;
328 
329  /*
330  * HeSVKEY_force will return a temporary mortal SV*, so we need to make
331  * sure to free it with ENTER/SAVE/FREE/LEAVE
332  */
333  ENTER;
334  SAVETMPS;
335 
336  /*-------------------------
337  * Unfortunately, while HeUTF8 is true for most things > 256, for values
338  * 128..255 it's not, but perl will treat them as unicode code points if
339  * the utf8 flag is not set ( see The "Unicode Bug" in perldoc perlunicode
340  * for more)
341  *
342  * So if we did the expected:
343  * if (HeUTF8(he))
344  * utf_u2e(key...);
345  * else // must be ascii
346  * return HePV(he);
347  * we won't match columns with codepoints from 128..255
348  *
349  * For a more concrete example given a column with the name of the unicode
350  * codepoint U+00ae (registered sign) and a UTF8 database and the perl
351  * return_next { "\N{U+00ae}=>'text } would always fail as heUTF8 returns
352  * 0 and HePV() would give us a char * with 1 byte contains the decimal
353  * value 174
354  *
355  * Perl has the brains to know when it should utf8 encode 174 properly, so
356  * here we force it into an SV so that perl will figure it out and do the
357  * right thing
358  *-------------------------
359  */
360 
361  sv = HeSVKEY_force(he);
362  if (HeUTF8(he))
363  SvUTF8_on(sv);
364  ret = sv2cstr(sv);
365 
366  /* free sv */
367  FREETMPS;
368  LEAVE;
369 
370  return ret;
371 }
372 
373 
374 /*
375  * _PG_init() - library load-time initialization
376  *
377  * DO NOT make this static nor change its name!
378  */
379 void
380 _PG_init(void)
381 {
382  /*
383  * Be sure we do initialization only once.
384  *
385  * If initialization fails due to, e.g., plperl_init_interp() throwing an
386  * exception, then we'll return here on the next usage and the user will
387  * get a rather cryptic: ERROR: attempt to redefine parameter
388  * "plperl.use_strict"
389  */
390  static bool inited = false;
391  HASHCTL hash_ctl;
392 
393  if (inited)
394  return;
395 
396  /*
397  * Support localized messages.
398  */
400 
401  /*
402  * Initialize plperl's GUCs.
403  */
404  DefineCustomBoolVariable("plperl.use_strict",
405  gettext_noop("If true, trusted and untrusted Perl code will be compiled in strict mode."),
406  NULL,
408  false,
409  PGC_USERSET, 0,
410  NULL, NULL, NULL);
411 
412  /*
413  * plperl.on_init is marked PGC_SIGHUP to support the idea that it might
414  * be executed in the postmaster (if plperl is loaded into the postmaster
415  * via shared_preload_libraries). This isn't really right either way,
416  * though.
417  */
418  DefineCustomStringVariable("plperl.on_init",
419  gettext_noop("Perl initialization code to execute when a Perl interpreter is initialized."),
420  NULL,
422  NULL,
423  PGC_SIGHUP, 0,
424  NULL, NULL, NULL);
425 
426  /*
427  * plperl.on_plperl_init is marked PGC_SUSET to avoid issues whereby a
428  * user who might not even have USAGE privilege on the plperl language
429  * could nonetheless use SET plperl.on_plperl_init='...' to influence the
430  * behaviour of any existing plperl function that they can execute (which
431  * might be SECURITY DEFINER, leading to a privilege escalation). See
432  * http://archives.postgresql.org/pgsql-hackers/2010-02/msg00281.php and
433  * the overall thread.
434  *
435  * Note that because plperl.use_strict is USERSET, a nefarious user could
436  * set it to be applied against other people's functions. This is judged
437  * OK since the worst result would be an error. Your code oughta pass
438  * use_strict anyway ;-)
439  */
440  DefineCustomStringVariable("plperl.on_plperl_init",
441  gettext_noop("Perl initialization code to execute once when plperl is first used."),
442  NULL,
444  NULL,
445  PGC_SUSET, 0,
446  NULL, NULL, NULL);
447 
448  DefineCustomStringVariable("plperl.on_plperlu_init",
449  gettext_noop("Perl initialization code to execute once when plperlu is first used."),
450  NULL,
452  NULL,
453  PGC_SUSET, 0,
454  NULL, NULL, NULL);
455 
456  MarkGUCPrefixReserved("plperl");
457 
458  /*
459  * Create hash tables.
460  */
461  hash_ctl.keysize = sizeof(Oid);
462  hash_ctl.entrysize = sizeof(plperl_interp_desc);
463  plperl_interp_hash = hash_create("PL/Perl interpreters",
464  8,
465  &hash_ctl,
467 
468  hash_ctl.keysize = sizeof(plperl_proc_key);
469  hash_ctl.entrysize = sizeof(plperl_proc_ptr);
470  plperl_proc_hash = hash_create("PL/Perl procedures",
471  32,
472  &hash_ctl,
474 
475  /*
476  * Save the default opmask.
477  */
478  PLPERL_SET_OPMASK(plperl_opmask);
479 
480  /*
481  * Create the first Perl interpreter, but only partially initialize it.
482  */
484 
485  inited = true;
486 }
487 
488 
489 static void
490 set_interp_require(bool trusted)
491 {
492  if (trusted)
493  {
494  PL_ppaddr[OP_REQUIRE] = pp_require_safe;
495  PL_ppaddr[OP_DOFILE] = pp_require_safe;
496  }
497  else
498  {
499  PL_ppaddr[OP_REQUIRE] = pp_require_orig;
500  PL_ppaddr[OP_DOFILE] = pp_require_orig;
501  }
502 }
503 
504 /*
505  * Cleanup perl interpreters, including running END blocks.
506  * Does not fully undo the actions of _PG_init() nor make it callable again.
507  */
508 static void
510 {
511  HASH_SEQ_STATUS hash_seq;
512  plperl_interp_desc *interp_desc;
513 
514  elog(DEBUG3, "plperl_fini");
515 
516  /*
517  * Indicate that perl is terminating. Disables use of spi_* functions when
518  * running END/DESTROY code. See check_spi_usage_allowed(). Could be
519  * enabled in future, with care, using a transaction
520  * http://archives.postgresql.org/pgsql-hackers/2010-01/msg02743.php
521  */
522  plperl_ending = true;
523 
524  /* Only perform perl cleanup if we're exiting cleanly */
525  if (code)
526  {
527  elog(DEBUG3, "plperl_fini: skipped");
528  return;
529  }
530 
531  /* Zap the "held" interpreter, if we still have it */
533 
534  /* Zap any fully-initialized interpreters */
535  hash_seq_init(&hash_seq, plperl_interp_hash);
536  while ((interp_desc = hash_seq_search(&hash_seq)) != NULL)
537  {
538  if (interp_desc->interp)
539  {
540  activate_interpreter(interp_desc);
541  plperl_destroy_interp(&interp_desc->interp);
542  }
543  }
544 
545  elog(DEBUG3, "plperl_fini: done");
546 }
547 
548 
549 /*
550  * Select and activate an appropriate Perl interpreter.
551  */
552 static void
553 select_perl_context(bool trusted)
554 {
555  Oid user_id;
556  plperl_interp_desc *interp_desc;
557  bool found;
558  PerlInterpreter *interp = NULL;
559 
560  /* Find or create the interpreter hashtable entry for this userid */
561  if (trusted)
562  user_id = GetUserId();
563  else
564  user_id = InvalidOid;
565 
566  interp_desc = hash_search(plperl_interp_hash, &user_id,
567  HASH_ENTER,
568  &found);
569  if (!found)
570  {
571  /* Initialize newly-created hashtable entry */
572  interp_desc->interp = NULL;
573  interp_desc->query_hash = NULL;
574  }
575 
576  /* Make sure we have a query_hash for this interpreter */
577  if (interp_desc->query_hash == NULL)
578  {
579  HASHCTL hash_ctl;
580 
581  hash_ctl.keysize = NAMEDATALEN;
582  hash_ctl.entrysize = sizeof(plperl_query_entry);
583  interp_desc->query_hash = hash_create("PL/Perl queries",
584  32,
585  &hash_ctl,
587  }
588 
589  /*
590  * Quick exit if already have an interpreter
591  */
592  if (interp_desc->interp)
593  {
594  activate_interpreter(interp_desc);
595  return;
596  }
597 
598  /*
599  * adopt held interp if free, else create new one if possible
600  */
601  if (plperl_held_interp != NULL)
602  {
603  /* first actual use of a perl interpreter */
604  interp = plperl_held_interp;
605 
606  /*
607  * Reset the plperl_held_interp pointer first; if we fail during init
608  * we don't want to try again with the partially-initialized interp.
609  */
610  plperl_held_interp = NULL;
611 
612  if (trusted)
614  else
616 
617  /* successfully initialized, so arrange for cleanup */
619  }
620  else
621  {
622 #ifdef MULTIPLICITY
623 
624  /*
625  * plperl_init_interp will change Perl's idea of the active
626  * interpreter. Reset plperl_active_interp temporarily, so that if we
627  * hit an error partway through here, we'll make sure to switch back
628  * to a non-broken interpreter before running any other Perl
629  * functions.
630  */
631  plperl_active_interp = NULL;
632 
633  /* Now build the new interpreter */
634  interp = plperl_init_interp();
635 
636  if (trusted)
638  else
640 #else
641  ereport(ERROR,
642  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
643  errmsg("cannot allocate multiple Perl interpreters on this platform")));
644 #endif
645  }
646 
647  set_interp_require(trusted);
648 
649  /*
650  * Since the timing of first use of PL/Perl can't be predicted, any
651  * database interaction during initialization is problematic. Including,
652  * but not limited to, security definer issues. So we only enable access
653  * to the database AFTER on_*_init code has run. See
654  * http://archives.postgresql.org/pgsql-hackers/2010-01/msg02669.php
655  */
656  {
657  dTHX;
658 
659  newXS("PostgreSQL::InServer::SPI::bootstrap",
661 
662  eval_pv("PostgreSQL::InServer::SPI::bootstrap()", FALSE);
663  if (SvTRUE(ERRSV))
664  ereport(ERROR,
665  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
667  errcontext("while executing PostgreSQL::InServer::SPI::bootstrap")));
668  }
669 
670  /* Fully initialized, so mark the hashtable entry valid */
671  interp_desc->interp = interp;
672 
673  /* And mark this as the active interpreter */
674  plperl_active_interp = interp_desc;
675 }
676 
677 /*
678  * Make the specified interpreter the active one
679  *
680  * A call with NULL does nothing. This is so that "restoring" to a previously
681  * null state of plperl_active_interp doesn't result in useless thrashing.
682  */
683 static void
685 {
686  if (interp_desc && plperl_active_interp != interp_desc)
687  {
688  Assert(interp_desc->interp);
689  PERL_SET_CONTEXT(interp_desc->interp);
690  /* trusted iff user_id isn't InvalidOid */
691  set_interp_require(OidIsValid(interp_desc->user_id));
692  plperl_active_interp = interp_desc;
693  }
694 }
695 
696 /*
697  * Create a new Perl interpreter.
698  *
699  * We initialize the interpreter as far as we can without knowing whether
700  * it will become a trusted or untrusted interpreter; in particular, the
701  * plperl.on_init code will get executed. Later, either plperl_trusted_init
702  * or plperl_untrusted_init must be called to complete the initialization.
703  */
704 static PerlInterpreter *
706 {
707  PerlInterpreter *plperl;
708 
709  static char *embedding[3 + 2] = {
710  "", "-e", PLC_PERLBOOT
711  };
712  int nargs = 3;
713 
714 #ifdef WIN32
715 
716  /*
717  * The perl library on startup does horrible things like call
718  * setlocale(LC_ALL,""). We have protected against that on most platforms
719  * by setting the environment appropriately. However, on Windows,
720  * setlocale() does not consult the environment, so we need to save the
721  * existing locale settings before perl has a chance to mangle them and
722  * restore them after its dirty deeds are done.
723  *
724  * MSDN ref:
725  * http://msdn.microsoft.com/library/en-us/vclib/html/_crt_locale.asp
726  *
727  * It appears that we only need to do this on interpreter startup, and
728  * subsequent calls to the interpreter don't mess with the locale
729  * settings.
730  *
731  * We restore them using setlocale_perl(), defined below, so that Perl
732  * doesn't have a different idea of the locale from Postgres.
733  *
734  */
735 
736  char *loc;
737  char *save_collate,
738  *save_ctype,
739  *save_monetary,
740  *save_numeric,
741  *save_time;
742 
743  loc = setlocale(LC_COLLATE, NULL);
744  save_collate = loc ? pstrdup(loc) : NULL;
745  loc = setlocale(LC_CTYPE, NULL);
746  save_ctype = loc ? pstrdup(loc) : NULL;
747  loc = setlocale(LC_MONETARY, NULL);
748  save_monetary = loc ? pstrdup(loc) : NULL;
749  loc = setlocale(LC_NUMERIC, NULL);
750  save_numeric = loc ? pstrdup(loc) : NULL;
751  loc = setlocale(LC_TIME, NULL);
752  save_time = loc ? pstrdup(loc) : NULL;
753 
754 #define PLPERL_RESTORE_LOCALE(name, saved) \
755  STMT_START { \
756  if (saved != NULL) { setlocale_perl(name, saved); pfree(saved); } \
757  } STMT_END
758 #endif /* WIN32 */
759 
761  {
762  embedding[nargs++] = "-e";
763  embedding[nargs++] = plperl_on_init;
764  }
765 
766  /*
767  * The perl API docs state that PERL_SYS_INIT3 should be called before
768  * allocating interpreters. Unfortunately, on some platforms this fails in
769  * the Perl_do_taint() routine, which is called when the platform is using
770  * the system's malloc() instead of perl's own. Other platforms, notably
771  * Windows, fail if PERL_SYS_INIT3 is not called. So we call it if it's
772  * available, unless perl is using the system malloc(), which is true when
773  * MYMALLOC is set.
774  */
775 #if defined(PERL_SYS_INIT3) && !defined(MYMALLOC)
776  {
777  static int perl_sys_init_done;
778 
779  /* only call this the first time through, as per perlembed man page */
780  if (!perl_sys_init_done)
781  {
782  char *dummy_env[1] = {NULL};
783 
784  PERL_SYS_INIT3(&nargs, (char ***) &embedding, (char ***) &dummy_env);
785 
786  /*
787  * For unclear reasons, PERL_SYS_INIT3 sets the SIGFPE handler to
788  * SIG_IGN. Aside from being extremely unfriendly behavior for a
789  * library, this is dumb on the grounds that the results of a
790  * SIGFPE in this state are undefined according to POSIX, and in
791  * fact you get a forced process kill at least on Linux. Hence,
792  * restore the SIGFPE handler to the backend's standard setting.
793  * (See Perl bug 114574 for more information.)
794  */
796 
797  perl_sys_init_done = 1;
798  /* quiet warning if PERL_SYS_INIT3 doesn't use the third argument */
799  dummy_env[0] = NULL;
800  }
801  }
802 #endif
803 
804  plperl = perl_alloc();
805  if (!plperl)
806  elog(ERROR, "could not allocate Perl interpreter");
807 
808  PERL_SET_CONTEXT(plperl);
809  perl_construct(plperl);
810 
811  /*
812  * Run END blocks in perl_destruct instead of perl_run. Note that dTHX
813  * loads up a pointer to the current interpreter, so we have to postpone
814  * it to here rather than put it at the function head.
815  */
816  {
817  dTHX;
818 
819  PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
820 
821  /*
822  * Record the original function for the 'require' and 'dofile'
823  * opcodes. (They share the same implementation.) Ensure it's used
824  * for new interpreters.
825  */
826  if (!pp_require_orig)
827  pp_require_orig = PL_ppaddr[OP_REQUIRE];
828  else
829  {
830  PL_ppaddr[OP_REQUIRE] = pp_require_orig;
831  PL_ppaddr[OP_DOFILE] = pp_require_orig;
832  }
833 
834 #ifdef PLPERL_ENABLE_OPMASK_EARLY
835 
836  /*
837  * For regression testing to prove that the PLC_PERLBOOT and
838  * PLC_TRUSTED code doesn't even compile any unsafe ops. In future
839  * there may be a valid need for them to do so, in which case this
840  * could be softened (perhaps moved to plperl_trusted_init()) or
841  * removed.
842  */
843  PL_op_mask = plperl_opmask;
844 #endif
845 
846  if (perl_parse(plperl, plperl_init_shared_libs,
847  nargs, embedding, NULL) != 0)
848  ereport(ERROR,
849  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
851  errcontext("while parsing Perl initialization")));
852 
853  if (perl_run(plperl) != 0)
854  ereport(ERROR,
855  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
857  errcontext("while running Perl initialization")));
858 
859 #ifdef PLPERL_RESTORE_LOCALE
860  PLPERL_RESTORE_LOCALE(LC_COLLATE, save_collate);
861  PLPERL_RESTORE_LOCALE(LC_CTYPE, save_ctype);
862  PLPERL_RESTORE_LOCALE(LC_MONETARY, save_monetary);
863  PLPERL_RESTORE_LOCALE(LC_NUMERIC, save_numeric);
864  PLPERL_RESTORE_LOCALE(LC_TIME, save_time);
865 #endif
866  }
867 
868  return plperl;
869 }
870 
871 
872 /*
873  * Our safe implementation of the require opcode.
874  * This is safe because it's completely unable to load any code.
875  * If the requested file/module has already been loaded it'll return true.
876  * If not, it'll die.
877  * So now "use Foo;" will work iff Foo has already been loaded.
878  */
879 static OP *
881 {
882  dVAR;
883  dSP;
884  SV *sv,
885  **svp;
886  char *name;
887  STRLEN len;
888 
889  sv = POPs;
890  name = SvPV(sv, len);
891  if (!(name && len > 0 && *name))
892  RETPUSHNO;
893 
894  svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
895  if (svp && *svp != &PL_sv_undef)
896  RETPUSHYES;
897 
898  DIE(aTHX_ "Unable to load %s into plperl", name);
899 
900  /*
901  * In most Perl versions, DIE() expands to a return statement, so the next
902  * line is not necessary. But in versions between but not including
903  * 5.11.1 and 5.13.3 it does not, so the next line is necessary to avoid a
904  * "control reaches end of non-void function" warning from gcc. Other
905  * compilers such as Solaris Studio will, however, issue a "statement not
906  * reached" warning instead.
907  */
908  return NULL;
909 }
910 
911 
912 /*
913  * Destroy one Perl interpreter ... actually we just run END blocks.
914  *
915  * Caller must have ensured this interpreter is the active one.
916  */
917 static void
918 plperl_destroy_interp(PerlInterpreter **interp)
919 {
920  if (interp && *interp)
921  {
922  /*
923  * Only a very minimal destruction is performed: - just call END
924  * blocks.
925  *
926  * We could call perl_destruct() but we'd need to audit its actions
927  * very carefully and work-around any that impact us. (Calling
928  * sv_clean_objs() isn't an option because it's not part of perl's
929  * public API so isn't portably available.) Meanwhile END blocks can
930  * be used to perform manual cleanup.
931  */
932  dTHX;
933 
934  /* Run END blocks - based on perl's perl_destruct() */
935  if (PL_exit_flags & PERL_EXIT_DESTRUCT_END)
936  {
937  dJMPENV;
938  int x = 0;
939 
940  JMPENV_PUSH(x);
942  if (PL_endav && !PL_minus_c)
943  call_list(PL_scopestack_ix, PL_endav);
944  JMPENV_POP;
945  }
946  LEAVE;
947  FREETMPS;
948 
949  *interp = NULL;
950  }
951 }
952 
953 /*
954  * Initialize the current Perl interpreter as a trusted interp
955  */
956 static void
958 {
959  dTHX;
960  HV *stash;
961  SV *sv;
962  char *key;
963  I32 klen;
964 
965  /* use original require while we set up */
966  PL_ppaddr[OP_REQUIRE] = pp_require_orig;
967  PL_ppaddr[OP_DOFILE] = pp_require_orig;
968 
969  eval_pv(PLC_TRUSTED, FALSE);
970  if (SvTRUE(ERRSV))
971  ereport(ERROR,
972  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
974  errcontext("while executing PLC_TRUSTED")));
975 
976  /*
977  * Force loading of utf8 module now to prevent errors that can arise from
978  * the regex code later trying to load utf8 modules. See
979  * http://rt.perl.org/rt3/Ticket/Display.html?id=47576
980  */
981  eval_pv("my $a=chr(0x100); return $a =~ /\\xa9/i", FALSE);
982  if (SvTRUE(ERRSV))
983  ereport(ERROR,
984  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
986  errcontext("while executing utf8fix")));
987 
988  /*
989  * Lock down the interpreter
990  */
991 
992  /* switch to the safe require/dofile opcode for future code */
993  PL_ppaddr[OP_REQUIRE] = pp_require_safe;
994  PL_ppaddr[OP_DOFILE] = pp_require_safe;
995 
996  /*
997  * prevent (any more) unsafe opcodes being compiled PL_op_mask is per
998  * interpreter, so this only needs to be set once
999  */
1000  PL_op_mask = plperl_opmask;
1001 
1002  /* delete the DynaLoader:: namespace so extensions can't be loaded */
1003  stash = gv_stashpv("DynaLoader", GV_ADDWARN);
1004  hv_iterinit(stash);
1005  while ((sv = hv_iternextsv(stash, &key, &klen)))
1006  {
1007  if (!isGV_with_GP(sv) || !GvCV(sv))
1008  continue;
1009  SvREFCNT_dec(GvCV(sv)); /* free the CV */
1010  GvCV_set(sv, NULL); /* prevent call via GV */
1011  }
1012  hv_clear(stash);
1013 
1014  /* invalidate assorted caches */
1015  ++PL_sub_generation;
1016  hv_clear(PL_stashcache);
1017 
1018  /*
1019  * Execute plperl.on_plperl_init in the locked-down interpreter
1020  */
1022  {
1023  eval_pv(plperl_on_plperl_init, FALSE);
1024  /* XXX need to find a way to determine a better errcode here */
1025  if (SvTRUE(ERRSV))
1026  ereport(ERROR,
1027  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
1029  errcontext("while executing plperl.on_plperl_init")));
1030  }
1031 }
1032 
1033 
1034 /*
1035  * Initialize the current Perl interpreter as an untrusted interp
1036  */
1037 static void
1039 {
1040  dTHX;
1041 
1042  /*
1043  * Nothing to do except execute plperl.on_plperlu_init
1044  */
1046  {
1047  eval_pv(plperl_on_plperlu_init, FALSE);
1048  if (SvTRUE(ERRSV))
1049  ereport(ERROR,
1050  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
1052  errcontext("while executing plperl.on_plperlu_init")));
1053  }
1054 }
1055 
1056 
1057 /*
1058  * Perl likes to put a newline after its error messages; clean up such
1059  */
1060 static char *
1061 strip_trailing_ws(const char *msg)
1062 {
1063  char *res = pstrdup(msg);
1064  int len = strlen(res);
1065 
1066  while (len > 0 && isspace((unsigned char) res[len - 1]))
1067  res[--len] = '\0';
1068  return res;
1069 }
1070 
1071 
1072 /* Build a tuple from a hash. */
1073 
1074 static HeapTuple
1076 {
1077  dTHX;
1078  Datum *values;
1079  bool *nulls;
1080  HE *he;
1081  HeapTuple tup;
1082 
1083  values = palloc0(sizeof(Datum) * td->natts);
1084  nulls = palloc(sizeof(bool) * td->natts);
1085  memset(nulls, true, sizeof(bool) * td->natts);
1086 
1087  hv_iterinit(perlhash);
1088  while ((he = hv_iternext(perlhash)))
1089  {
1090  SV *val = HeVAL(he);
1091  char *key = hek2cstr(he);
1092  int attn = SPI_fnumber(td, key);
1093  Form_pg_attribute attr = TupleDescAttr(td, attn - 1);
1094 
1095  if (attn == SPI_ERROR_NOATTRIBUTE)
1096  ereport(ERROR,
1097  (errcode(ERRCODE_UNDEFINED_COLUMN),
1098  errmsg("Perl hash contains nonexistent column \"%s\"",
1099  key)));
1100  if (attn <= 0)
1101  ereport(ERROR,
1102  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1103  errmsg("cannot set system attribute \"%s\"",
1104  key)));
1105 
1106  values[attn - 1] = plperl_sv_to_datum(val,
1107  attr->atttypid,
1108  attr->atttypmod,
1109  NULL,
1110  NULL,
1111  InvalidOid,
1112  &nulls[attn - 1]);
1113 
1114  pfree(key);
1115  }
1116  hv_iterinit(perlhash);
1117 
1118  tup = heap_form_tuple(td, values, nulls);
1119  pfree(values);
1120  pfree(nulls);
1121  return tup;
1122 }
1123 
1124 /* convert a hash reference to a datum */
1125 static Datum
1127 {
1128  HeapTuple tup = plperl_build_tuple_result((HV *) SvRV(src), td);
1129 
1130  return HeapTupleGetDatum(tup);
1131 }
1132 
1133 /*
1134  * if we are an array ref return the reference. this is special in that if we
1135  * are a PostgreSQL::InServer::ARRAY object we will return the 'magic' array.
1136  */
1137 static SV *
1139 {
1140  dTHX;
1141 
1142  if (SvOK(sv) && SvROK(sv))
1143  {
1144  if (SvTYPE(SvRV(sv)) == SVt_PVAV)
1145  return sv;
1146  else if (sv_isa(sv, "PostgreSQL::InServer::ARRAY"))
1147  {
1148  HV *hv = (HV *) SvRV(sv);
1149  SV **sav = hv_fetch_string(hv, "array");
1150 
1151  if (*sav && SvOK(*sav) && SvROK(*sav) &&
1152  SvTYPE(SvRV(*sav)) == SVt_PVAV)
1153  return *sav;
1154 
1155  elog(ERROR, "could not get array reference from PostgreSQL::InServer::ARRAY object");
1156  }
1157  }
1158  return NULL;
1159 }
1160 
1161 /*
1162  * helper function for plperl_array_to_datum, recurses for multi-D arrays
1163  *
1164  * The ArrayBuildState is created only when we first find a scalar element;
1165  * if we didn't do it like that, we'd need some other convention for knowing
1166  * whether we'd already found any scalars (and thus the number of dimensions
1167  * is frozen).
1168  */
1169 static void
1171  int *ndims, int *dims, int cur_depth,
1172  Oid elemtypid, int32 typmod,
1173  FmgrInfo *finfo, Oid typioparam)
1174 {
1175  dTHX;
1176  int i;
1177  int len = av_len(av) + 1;
1178 
1179  for (i = 0; i < len; i++)
1180  {
1181  /* fetch the array element */
1182  SV **svp = av_fetch(av, i, FALSE);
1183 
1184  /* see if this element is an array, if so get that */
1185  SV *sav = svp ? get_perl_array_ref(*svp) : NULL;
1186 
1187  /* multi-dimensional array? */
1188  if (sav)
1189  {
1190  AV *nav = (AV *) SvRV(sav);
1191 
1192  /* set size when at first element in this level, else compare */
1193  if (i == 0 && *ndims == cur_depth)
1194  {
1195  /* array after some scalars at same level? */
1196  if (*astatep != NULL)
1197  ereport(ERROR,
1198  (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
1199  errmsg("multidimensional arrays must have array expressions with matching dimensions")));
1200  /* too many dimensions? */
1201  if (cur_depth + 1 > MAXDIM)
1202  ereport(ERROR,
1203  (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
1204  errmsg("number of array dimensions exceeds the maximum allowed (%d)",
1205  MAXDIM)));
1206  /* OK, add a dimension */
1207  dims[*ndims] = av_len(nav) + 1;
1208  (*ndims)++;
1209  }
1210  else if (cur_depth >= *ndims ||
1211  av_len(nav) + 1 != dims[cur_depth])
1212  ereport(ERROR,
1213  (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
1214  errmsg("multidimensional arrays must have array expressions with matching dimensions")));
1215 
1216  /* recurse to fetch elements of this sub-array */
1217  array_to_datum_internal(nav, astatep,
1218  ndims, dims, cur_depth + 1,
1219  elemtypid, typmod,
1220  finfo, typioparam);
1221  }
1222  else
1223  {
1224  Datum dat;
1225  bool isnull;
1226 
1227  /* scalar after some sub-arrays at same level? */
1228  if (*ndims != cur_depth)
1229  ereport(ERROR,
1230  (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
1231  errmsg("multidimensional arrays must have array expressions with matching dimensions")));
1232 
1233  dat = plperl_sv_to_datum(svp ? *svp : NULL,
1234  elemtypid,
1235  typmod,
1236  NULL,
1237  finfo,
1238  typioparam,
1239  &isnull);
1240 
1241  /* Create ArrayBuildState if we didn't already */
1242  if (*astatep == NULL)
1243  *astatep = initArrayResult(elemtypid,
1244  CurrentMemoryContext, true);
1245 
1246  /* ... and save the element value in it */
1247  (void) accumArrayResult(*astatep, dat, isnull,
1248  elemtypid, CurrentMemoryContext);
1249  }
1250  }
1251 }
1252 
1253 /*
1254  * convert perl array ref to a datum
1255  */
1256 static Datum
1257 plperl_array_to_datum(SV *src, Oid typid, int32 typmod)
1258 {
1259  dTHX;
1260  AV *nav = (AV *) SvRV(src);
1261  ArrayBuildState *astate = NULL;
1262  Oid elemtypid;
1263  FmgrInfo finfo;
1264  Oid typioparam;
1265  int dims[MAXDIM];
1266  int lbs[MAXDIM];
1267  int ndims = 1;
1268  int i;
1269 
1270  elemtypid = get_element_type(typid);
1271  if (!elemtypid)
1272  ereport(ERROR,
1273  (errcode(ERRCODE_DATATYPE_MISMATCH),
1274  errmsg("cannot convert Perl array to non-array type %s",
1275  format_type_be(typid))));
1276 
1277  _sv_to_datum_finfo(elemtypid, &finfo, &typioparam);
1278 
1279  memset(dims, 0, sizeof(dims));
1280  dims[0] = av_len(nav) + 1;
1281 
1282  array_to_datum_internal(nav, &astate,
1283  &ndims, dims, 1,
1284  elemtypid, typmod,
1285  &finfo, typioparam);
1286 
1287  /* ensure we get zero-D array for no inputs, as per PG convention */
1288  if (astate == NULL)
1289  return PointerGetDatum(construct_empty_array(elemtypid));
1290 
1291  for (i = 0; i < ndims; i++)
1292  lbs[i] = 1;
1293 
1294  return makeMdArrayResult(astate, ndims, dims, lbs,
1295  CurrentMemoryContext, true);
1296 }
1297 
1298 /* Get the information needed to convert data to the specified PG type */
1299 static void
1300 _sv_to_datum_finfo(Oid typid, FmgrInfo *finfo, Oid *typioparam)
1301 {
1302  Oid typinput;
1303 
1304  /* XXX would be better to cache these lookups */
1305  getTypeInputInfo(typid,
1306  &typinput, typioparam);
1307  fmgr_info(typinput, finfo);
1308 }
1309 
1310 /*
1311  * convert Perl SV to PG datum of type typid, typmod typmod
1312  *
1313  * Pass the PL/Perl function's fcinfo when attempting to convert to the
1314  * function's result type; otherwise pass NULL. This is used when we need to
1315  * resolve the actual result type of a function returning RECORD.
1316  *
1317  * finfo and typioparam should be the results of _sv_to_datum_finfo for the
1318  * given typid, or NULL/InvalidOid to let this function do the lookups.
1319  *
1320  * *isnull is an output parameter.
1321  */
1322 static Datum
1323 plperl_sv_to_datum(SV *sv, Oid typid, int32 typmod,
1324  FunctionCallInfo fcinfo,
1325  FmgrInfo *finfo, Oid typioparam,
1326  bool *isnull)
1327 {
1328  FmgrInfo tmp;
1329  Oid funcid;
1330 
1331  /* we might recurse */
1333 
1334  *isnull = false;
1335 
1336  /*
1337  * Return NULL if result is undef, or if we're in a function returning
1338  * VOID. In the latter case, we should pay no attention to the last Perl
1339  * statement's result, and this is a convenient means to ensure that.
1340  */
1341  if (!sv || !SvOK(sv) || typid == VOIDOID)
1342  {
1343  /* look up type info if they did not pass it */
1344  if (!finfo)
1345  {
1346  _sv_to_datum_finfo(typid, &tmp, &typioparam);
1347  finfo = &tmp;
1348  }
1349  *isnull = true;
1350  /* must call typinput in case it wants to reject NULL */
1351  return InputFunctionCall(finfo, NULL, typioparam, typmod);
1352  }
1354  return OidFunctionCall1(funcid, PointerGetDatum(sv));
1355  else if (SvROK(sv))
1356  {
1357  /* handle references */
1358  SV *sav = get_perl_array_ref(sv);
1359 
1360  if (sav)
1361  {
1362  /* handle an arrayref */
1363  return plperl_array_to_datum(sav, typid, typmod);
1364  }
1365  else if (SvTYPE(SvRV(sv)) == SVt_PVHV)
1366  {
1367  /* handle a hashref */
1368  Datum ret;
1369  TupleDesc td;
1370  bool isdomain;
1371 
1372  if (!type_is_rowtype(typid))
1373  ereport(ERROR,
1374  (errcode(ERRCODE_DATATYPE_MISMATCH),
1375  errmsg("cannot convert Perl hash to non-composite type %s",
1376  format_type_be(typid))));
1377 
1378  td = lookup_rowtype_tupdesc_domain(typid, typmod, true);
1379  if (td != NULL)
1380  {
1381  /* Did we look through a domain? */
1382  isdomain = (typid != td->tdtypeid);
1383  }
1384  else
1385  {
1386  /* Must be RECORD, try to resolve based on call info */
1387  TypeFuncClass funcclass;
1388 
1389  if (fcinfo)
1390  funcclass = get_call_result_type(fcinfo, &typid, &td);
1391  else
1392  funcclass = TYPEFUNC_OTHER;
1393  if (funcclass != TYPEFUNC_COMPOSITE &&
1394  funcclass != TYPEFUNC_COMPOSITE_DOMAIN)
1395  ereport(ERROR,
1396  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1397  errmsg("function returning record called in context "
1398  "that cannot accept type record")));
1399  Assert(td);
1400  isdomain = (funcclass == TYPEFUNC_COMPOSITE_DOMAIN);
1401  }
1402 
1403  ret = plperl_hash_to_datum(sv, td);
1404 
1405  if (isdomain)
1406  domain_check(ret, false, typid, NULL, NULL);
1407 
1408  /* Release on the result of get_call_result_type is harmless */
1409  ReleaseTupleDesc(td);
1410 
1411  return ret;
1412  }
1413 
1414  /*
1415  * If it's a reference to something else, such as a scalar, just
1416  * recursively look through the reference.
1417  */
1418  return plperl_sv_to_datum(SvRV(sv), typid, typmod,
1419  fcinfo, finfo, typioparam,
1420  isnull);
1421  }
1422  else
1423  {
1424  /* handle a string/number */
1425  Datum ret;
1426  char *str = sv2cstr(sv);
1427 
1428  /* did not pass in any typeinfo? look it up */
1429  if (!finfo)
1430  {
1431  _sv_to_datum_finfo(typid, &tmp, &typioparam);
1432  finfo = &tmp;
1433  }
1434 
1435  ret = InputFunctionCall(finfo, str, typioparam, typmod);
1436  pfree(str);
1437 
1438  return ret;
1439  }
1440 }
1441 
1442 /* Convert the perl SV to a string returned by the type output function */
1443 char *
1444 plperl_sv_to_literal(SV *sv, char *fqtypename)
1445 {
1446  Oid typid;
1447  Oid typoutput;
1448  Datum datum;
1449  bool typisvarlena,
1450  isnull;
1451 
1453 
1454  typid = DirectFunctionCall1(regtypein, CStringGetDatum(fqtypename));
1455  if (!OidIsValid(typid))
1456  ereport(ERROR,
1457  (errcode(ERRCODE_UNDEFINED_OBJECT),
1458  errmsg("lookup failed for type %s", fqtypename)));
1459 
1460  datum = plperl_sv_to_datum(sv,
1461  typid, -1,
1462  NULL, NULL, InvalidOid,
1463  &isnull);
1464 
1465  if (isnull)
1466  return NULL;
1467 
1468  getTypeOutputInfo(typid,
1469  &typoutput, &typisvarlena);
1470 
1471  return OidOutputFunctionCall(typoutput, datum);
1472 }
1473 
1474 /*
1475  * Convert PostgreSQL array datum to a perl array reference.
1476  *
1477  * typid is arg's OID, which must be an array type.
1478  */
1479 static SV *
1481 {
1482  dTHX;
1484  Oid elementtype = ARR_ELEMTYPE(ar);
1485  int16 typlen;
1486  bool typbyval;
1487  char typalign,
1488  typdelim;
1489  Oid typioparam;
1490  Oid typoutputfunc;
1491  Oid transform_funcid;
1492  int i,
1493  nitems,
1494  *dims;
1495  plperl_array_info *info;
1496  SV *av;
1497  HV *hv;
1498 
1499  /*
1500  * Currently we make no effort to cache any of the stuff we look up here,
1501  * which is bad.
1502  */
1503  info = palloc0(sizeof(plperl_array_info));
1504 
1505  /* get element type information, including output conversion function */
1506  get_type_io_data(elementtype, IOFunc_output,
1507  &typlen, &typbyval, &typalign,
1508  &typdelim, &typioparam, &typoutputfunc);
1509 
1510  /* Check for a transform function */
1511  transform_funcid = get_transform_fromsql(elementtype,
1514 
1515  /* Look up transform or output function as appropriate */
1516  if (OidIsValid(transform_funcid))
1517  fmgr_info(transform_funcid, &info->transform_proc);
1518  else
1519  fmgr_info(typoutputfunc, &info->proc);
1520 
1521  info->elem_is_rowtype = type_is_rowtype(elementtype);
1522 
1523  /* Get the number and bounds of array dimensions */
1524  info->ndims = ARR_NDIM(ar);
1525  dims = ARR_DIMS(ar);
1526 
1527  /* No dimensions? Return an empty array */
1528  if (info->ndims == 0)
1529  {
1530  av = newRV_noinc((SV *) newAV());
1531  }
1532  else
1533  {
1534  deconstruct_array(ar, elementtype, typlen, typbyval,
1535  typalign, &info->elements, &info->nulls,
1536  &nitems);
1537 
1538  /* Get total number of elements in each dimension */
1539  info->nelems = palloc(sizeof(int) * info->ndims);
1540  info->nelems[0] = nitems;
1541  for (i = 1; i < info->ndims; i++)
1542  info->nelems[i] = info->nelems[i - 1] / dims[i - 1];
1543 
1544  av = split_array(info, 0, nitems, 0);
1545  }
1546 
1547  hv = newHV();
1548  (void) hv_store(hv, "array", 5, av, 0);
1549  (void) hv_store(hv, "typeoid", 7, newSVuv(typid), 0);
1550 
1551  return sv_bless(newRV_noinc((SV *) hv),
1552  gv_stashpv("PostgreSQL::InServer::ARRAY", 0));
1553 }
1554 
1555 /*
1556  * Recursively form array references from splices of the initial array
1557  */
1558 static SV *
1559 split_array(plperl_array_info *info, int first, int last, int nest)
1560 {
1561  dTHX;
1562  int i;
1563  AV *result;
1564 
1565  /* we should only be called when we have something to split */
1566  Assert(info->ndims > 0);
1567 
1568  /* since this function recurses, it could be driven to stack overflow */
1570 
1571  /*
1572  * Base case, return a reference to a single-dimensional array
1573  */
1574  if (nest >= info->ndims - 1)
1575  return make_array_ref(info, first, last);
1576 
1577  result = newAV();
1578  for (i = first; i < last; i += info->nelems[nest + 1])
1579  {
1580  /* Recursively form references to arrays of lower dimensions */
1581  SV *ref = split_array(info, i, i + info->nelems[nest + 1], nest + 1);
1582 
1583  av_push(result, ref);
1584  }
1585  return newRV_noinc((SV *) result);
1586 }
1587 
1588 /*
1589  * Create a Perl reference from a one-dimensional C array, converting
1590  * composite type elements to hash references.
1591  */
1592 static SV *
1593 make_array_ref(plperl_array_info *info, int first, int last)
1594 {
1595  dTHX;
1596  int i;
1597  AV *result = newAV();
1598 
1599  for (i = first; i < last; i++)
1600  {
1601  if (info->nulls[i])
1602  {
1603  /*
1604  * We can't use &PL_sv_undef here. See "AVs, HVs and undefined
1605  * values" in perlguts.
1606  */
1607  av_push(result, newSV(0));
1608  }
1609  else
1610  {
1611  Datum itemvalue = info->elements[i];
1612 
1613  if (info->transform_proc.fn_oid)
1614  av_push(result, (SV *) DatumGetPointer(FunctionCall1(&info->transform_proc, itemvalue)));
1615  else if (info->elem_is_rowtype)
1616  /* Handle composite type elements */
1617  av_push(result, plperl_hash_from_datum(itemvalue));
1618  else
1619  {
1620  char *val = OutputFunctionCall(&info->proc, itemvalue);
1621 
1622  av_push(result, cstr2sv(val));
1623  }
1624  }
1625  }
1626  return newRV_noinc((SV *) result);
1627 }
1628 
1629 /* Set up the arguments for a trigger call. */
1630 static SV *
1632 {
1633  dTHX;
1634  TriggerData *tdata;
1635  TupleDesc tupdesc;
1636  int i;
1637  char *level;
1638  char *event;
1639  char *relid;
1640  char *when;
1641  HV *hv;
1642 
1643  hv = newHV();
1644  hv_ksplit(hv, 12); /* pre-grow the hash */
1645 
1646  tdata = (TriggerData *) fcinfo->context;
1647  tupdesc = tdata->tg_relation->rd_att;
1648 
1650  ObjectIdGetDatum(tdata->tg_relation->rd_id)));
1651 
1652  hv_store_string(hv, "name", cstr2sv(tdata->tg_trigger->tgname));
1653  hv_store_string(hv, "relid", cstr2sv(relid));
1654 
1655  /*
1656  * Note: In BEFORE trigger, stored generated columns are not computed yet,
1657  * so don't make them accessible in NEW row.
1658  */
1659 
1660  if (TRIGGER_FIRED_BY_INSERT(tdata->tg_event))
1661  {
1662  event = "INSERT";
1663  if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
1664  hv_store_string(hv, "new",
1666  tupdesc,
1667  !TRIGGER_FIRED_BEFORE(tdata->tg_event)));
1668  }
1669  else if (TRIGGER_FIRED_BY_DELETE(tdata->tg_event))
1670  {
1671  event = "DELETE";
1672  if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
1673  hv_store_string(hv, "old",
1675  tupdesc,
1676  true));
1677  }
1678  else if (TRIGGER_FIRED_BY_UPDATE(tdata->tg_event))
1679  {
1680  event = "UPDATE";
1681  if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
1682  {
1683  hv_store_string(hv, "old",
1685  tupdesc,
1686  true));
1687  hv_store_string(hv, "new",
1689  tupdesc,
1690  !TRIGGER_FIRED_BEFORE(tdata->tg_event)));
1691  }
1692  }
1693  else if (TRIGGER_FIRED_BY_TRUNCATE(tdata->tg_event))
1694  event = "TRUNCATE";
1695  else
1696  event = "UNKNOWN";
1697 
1698  hv_store_string(hv, "event", cstr2sv(event));
1699  hv_store_string(hv, "argc", newSViv(tdata->tg_trigger->tgnargs));
1700 
1701  if (tdata->tg_trigger->tgnargs > 0)
1702  {
1703  AV *av = newAV();
1704 
1705  av_extend(av, tdata->tg_trigger->tgnargs);
1706  for (i = 0; i < tdata->tg_trigger->tgnargs; i++)
1707  av_push(av, cstr2sv(tdata->tg_trigger->tgargs[i]));
1708  hv_store_string(hv, "args", newRV_noinc((SV *) av));
1709  }
1710 
1711  hv_store_string(hv, "relname",
1713 
1714  hv_store_string(hv, "table_name",
1716 
1717  hv_store_string(hv, "table_schema",
1719 
1720  if (TRIGGER_FIRED_BEFORE(tdata->tg_event))
1721  when = "BEFORE";
1722  else if (TRIGGER_FIRED_AFTER(tdata->tg_event))
1723  when = "AFTER";
1724  else if (TRIGGER_FIRED_INSTEAD(tdata->tg_event))
1725  when = "INSTEAD OF";
1726  else
1727  when = "UNKNOWN";
1728  hv_store_string(hv, "when", cstr2sv(when));
1729 
1730  if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
1731  level = "ROW";
1732  else if (TRIGGER_FIRED_FOR_STATEMENT(tdata->tg_event))
1733  level = "STATEMENT";
1734  else
1735  level = "UNKNOWN";
1736  hv_store_string(hv, "level", cstr2sv(level));
1737 
1738  return newRV_noinc((SV *) hv);
1739 }
1740 
1741 
1742 /* Set up the arguments for an event trigger call. */
1743 static SV *
1745 {
1746  dTHX;
1747  EventTriggerData *tdata;
1748  HV *hv;
1749 
1750  hv = newHV();
1751 
1752  tdata = (EventTriggerData *) fcinfo->context;
1753 
1754  hv_store_string(hv, "event", cstr2sv(tdata->event));
1755  hv_store_string(hv, "tag", cstr2sv(GetCommandTagName(tdata->tag)));
1756 
1757  return newRV_noinc((SV *) hv);
1758 }
1759 
1760 /* Construct the modified new tuple to be returned from a trigger. */
1761 static HeapTuple
1763 {
1764  dTHX;
1765  SV **svp;
1766  HV *hvNew;
1767  HE *he;
1768  HeapTuple rtup;
1769  TupleDesc tupdesc;
1770  int natts;
1771  Datum *modvalues;
1772  bool *modnulls;
1773  bool *modrepls;
1774 
1775  svp = hv_fetch_string(hvTD, "new");
1776  if (!svp)
1777  ereport(ERROR,
1778  (errcode(ERRCODE_UNDEFINED_COLUMN),
1779  errmsg("$_TD->{new} does not exist")));
1780  if (!SvOK(*svp) || !SvROK(*svp) || SvTYPE(SvRV(*svp)) != SVt_PVHV)
1781  ereport(ERROR,
1782  (errcode(ERRCODE_DATATYPE_MISMATCH),
1783  errmsg("$_TD->{new} is not a hash reference")));
1784  hvNew = (HV *) SvRV(*svp);
1785 
1786  tupdesc = tdata->tg_relation->rd_att;
1787  natts = tupdesc->natts;
1788 
1789  modvalues = (Datum *) palloc0(natts * sizeof(Datum));
1790  modnulls = (bool *) palloc0(natts * sizeof(bool));
1791  modrepls = (bool *) palloc0(natts * sizeof(bool));
1792 
1793  hv_iterinit(hvNew);
1794  while ((he = hv_iternext(hvNew)))
1795  {
1796  char *key = hek2cstr(he);
1797  SV *val = HeVAL(he);
1798  int attn = SPI_fnumber(tupdesc, key);
1799  Form_pg_attribute attr = TupleDescAttr(tupdesc, attn - 1);
1800 
1801  if (attn == SPI_ERROR_NOATTRIBUTE)
1802  ereport(ERROR,
1803  (errcode(ERRCODE_UNDEFINED_COLUMN),
1804  errmsg("Perl hash contains nonexistent column \"%s\"",
1805  key)));
1806  if (attn <= 0)
1807  ereport(ERROR,
1808  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1809  errmsg("cannot set system attribute \"%s\"",
1810  key)));
1811  if (attr->attgenerated)
1812  ereport(ERROR,
1813  (errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
1814  errmsg("cannot set generated column \"%s\"",
1815  key)));
1816 
1817  modvalues[attn - 1] = plperl_sv_to_datum(val,
1818  attr->atttypid,
1819  attr->atttypmod,
1820  NULL,
1821  NULL,
1822  InvalidOid,
1823  &modnulls[attn - 1]);
1824  modrepls[attn - 1] = true;
1825 
1826  pfree(key);
1827  }
1828  hv_iterinit(hvNew);
1829 
1830  rtup = heap_modify_tuple(otup, tupdesc, modvalues, modnulls, modrepls);
1831 
1832  pfree(modvalues);
1833  pfree(modnulls);
1834  pfree(modrepls);
1835 
1836  return rtup;
1837 }
1838 
1839 
1840 /*
1841  * There are three externally visible pieces to plperl: plperl_call_handler,
1842  * plperl_inline_handler, and plperl_validator.
1843  */
1844 
1845 /*
1846  * The call handler is called to run normal functions (including trigger
1847  * functions) that are defined in pg_proc.
1848  */
1850 
1851 Datum
1853 {
1854  Datum retval = (Datum) 0;
1855  plperl_call_data *volatile save_call_data = current_call_data;
1856  plperl_interp_desc *volatile oldinterp = plperl_active_interp;
1857  plperl_call_data this_call_data;
1858 
1859  /* Initialize current-call status record */
1860  MemSet(&this_call_data, 0, sizeof(this_call_data));
1861  this_call_data.fcinfo = fcinfo;
1862 
1863  PG_TRY();
1864  {
1865  current_call_data = &this_call_data;
1866  if (CALLED_AS_TRIGGER(fcinfo))
1867  retval = plperl_trigger_handler(fcinfo);
1868  else if (CALLED_AS_EVENT_TRIGGER(fcinfo))
1869  {
1871  retval = (Datum) 0;
1872  }
1873  else
1874  retval = plperl_func_handler(fcinfo);
1875  }
1876  PG_FINALLY();
1877  {
1878  current_call_data = save_call_data;
1879  activate_interpreter(oldinterp);
1880  if (this_call_data.prodesc)
1881  decrement_prodesc_refcount(this_call_data.prodesc);
1882  }
1883  PG_END_TRY();
1884 
1885  return retval;
1886 }
1887 
1888 /*
1889  * The inline handler runs anonymous code blocks (DO blocks).
1890  */
1892 
1893 Datum
1895 {
1896  LOCAL_FCINFO(fake_fcinfo, 0);
1898  FmgrInfo flinfo;
1899  plperl_proc_desc desc;
1900  plperl_call_data *volatile save_call_data = current_call_data;
1901  plperl_interp_desc *volatile oldinterp = plperl_active_interp;
1902  plperl_call_data this_call_data;
1903  ErrorContextCallback pl_error_context;
1904 
1905  /* Initialize current-call status record */
1906  MemSet(&this_call_data, 0, sizeof(this_call_data));
1907 
1908  /* Set up a callback for error reporting */
1909  pl_error_context.callback = plperl_inline_callback;
1910  pl_error_context.previous = error_context_stack;
1911  pl_error_context.arg = NULL;
1912  error_context_stack = &pl_error_context;
1913 
1914  /*
1915  * Set up a fake fcinfo and descriptor with just enough info to satisfy
1916  * plperl_call_perl_func(). In particular note that this sets things up
1917  * with no arguments passed, and a result type of VOID.
1918  */
1919  MemSet(fake_fcinfo, 0, SizeForFunctionCallInfo(0));
1920  MemSet(&flinfo, 0, sizeof(flinfo));
1921  MemSet(&desc, 0, sizeof(desc));
1922  fake_fcinfo->flinfo = &flinfo;
1923  flinfo.fn_oid = InvalidOid;
1924  flinfo.fn_mcxt = CurrentMemoryContext;
1925 
1926  desc.proname = "inline_code_block";
1927  desc.fn_readonly = false;
1928 
1929  desc.lang_oid = codeblock->langOid;
1930  desc.trftypes = NIL;
1931  desc.lanpltrusted = codeblock->langIsTrusted;
1932 
1933  desc.fn_retistuple = false;
1934  desc.fn_retisset = false;
1935  desc.fn_retisarray = false;
1936  desc.result_oid = InvalidOid;
1937  desc.nargs = 0;
1938  desc.reference = NULL;
1939 
1940  this_call_data.fcinfo = fake_fcinfo;
1941  this_call_data.prodesc = &desc;
1942  /* we do not bother with refcounting the fake prodesc */
1943 
1944  PG_TRY();
1945  {
1946  SV *perlret;
1947 
1948  current_call_data = &this_call_data;
1949 
1950  if (SPI_connect_ext(codeblock->atomic ? 0 : SPI_OPT_NONATOMIC) != SPI_OK_CONNECT)
1951  elog(ERROR, "could not connect to SPI manager");
1952 
1954 
1955  plperl_create_sub(&desc, codeblock->source_text, 0);
1956 
1957  if (!desc.reference) /* can this happen? */
1958  elog(ERROR, "could not create internal procedure for anonymous code block");
1959 
1960  perlret = plperl_call_perl_func(&desc, fake_fcinfo);
1961 
1962  SvREFCNT_dec_current(perlret);
1963 
1964  if (SPI_finish() != SPI_OK_FINISH)
1965  elog(ERROR, "SPI_finish() failed");
1966  }
1967  PG_FINALLY();
1968  {
1969  if (desc.reference)
1971  current_call_data = save_call_data;
1972  activate_interpreter(oldinterp);
1973  }
1974  PG_END_TRY();
1975 
1976  error_context_stack = pl_error_context.previous;
1977 
1978  PG_RETURN_VOID();
1979 }
1980 
1981 /*
1982  * The validator is called during CREATE FUNCTION to validate the function
1983  * being created/replaced. The precise behavior of the validator may be
1984  * modified by the check_function_bodies GUC.
1985  */
1987 
1988 Datum
1990 {
1991  Oid funcoid = PG_GETARG_OID(0);
1992  HeapTuple tuple;
1993  Form_pg_proc proc;
1994  char functyptype;
1995  int numargs;
1996  Oid *argtypes;
1997  char **argnames;
1998  char *argmodes;
1999  bool is_trigger = false;
2000  bool is_event_trigger = false;
2001  int i;
2002 
2003  if (!CheckFunctionValidatorAccess(fcinfo->flinfo->fn_oid, funcoid))
2004  PG_RETURN_VOID();
2005 
2006  /* Get the new function's pg_proc entry */
2007  tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcoid));
2008  if (!HeapTupleIsValid(tuple))
2009  elog(ERROR, "cache lookup failed for function %u", funcoid);
2010  proc = (Form_pg_proc) GETSTRUCT(tuple);
2011 
2012  functyptype = get_typtype(proc->prorettype);
2013 
2014  /* Disallow pseudotype result */
2015  /* except for TRIGGER, EVTTRIGGER, RECORD, or VOID */
2016  if (functyptype == TYPTYPE_PSEUDO)
2017  {
2018  if (proc->prorettype == TRIGGEROID)
2019  is_trigger = true;
2020  else if (proc->prorettype == EVENT_TRIGGEROID)
2021  is_event_trigger = true;
2022  else if (proc->prorettype != RECORDOID &&
2023  proc->prorettype != VOIDOID)
2024  ereport(ERROR,
2025  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2026  errmsg("PL/Perl functions cannot return type %s",
2027  format_type_be(proc->prorettype))));
2028  }
2029 
2030  /* Disallow pseudotypes in arguments (either IN or OUT) */
2031  numargs = get_func_arg_info(tuple,
2032  &argtypes, &argnames, &argmodes);
2033  for (i = 0; i < numargs; i++)
2034  {
2035  if (get_typtype(argtypes[i]) == TYPTYPE_PSEUDO &&
2036  argtypes[i] != RECORDOID)
2037  ereport(ERROR,
2038  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2039  errmsg("PL/Perl functions cannot accept type %s",
2040  format_type_be(argtypes[i]))));
2041  }
2042 
2043  ReleaseSysCache(tuple);
2044 
2045  /* Postpone body checks if !check_function_bodies */
2047  {
2048  (void) compile_plperl_function(funcoid, is_trigger, is_event_trigger);
2049  }
2050 
2051  /* the result of a validator is ignored */
2052  PG_RETURN_VOID();
2053 }
2054 
2055 
2056 /*
2057  * plperlu likewise requires three externally visible functions:
2058  * plperlu_call_handler, plperlu_inline_handler, and plperlu_validator.
2059  * These are currently just aliases that send control to the plperl
2060  * handler functions, and we decide whether a particular function is
2061  * trusted or not by inspecting the actual pg_language tuple.
2062  */
2063 
2065 
2066 Datum
2068 {
2069  return plperl_call_handler(fcinfo);
2070 }
2071 
2073 
2074 Datum
2076 {
2077  return plperl_inline_handler(fcinfo);
2078 }
2079 
2081 
2082 Datum
2084 {
2085  /* call plperl validator with our fcinfo so it gets our oid */
2086  return plperl_validator(fcinfo);
2087 }
2088 
2089 
2090 /*
2091  * Uses mkfunc to create a subroutine whose text is
2092  * supplied in s, and returns a reference to it
2093  */
2094 static void
2095 plperl_create_sub(plperl_proc_desc *prodesc, const char *s, Oid fn_oid)
2096 {
2097  dTHX;
2098  dSP;
2099  char subname[NAMEDATALEN + 40];
2100  HV *pragma_hv = newHV();
2101  SV *subref = NULL;
2102  int count;
2103 
2104  sprintf(subname, "%s__%u", prodesc->proname, fn_oid);
2105 
2106  if (plperl_use_strict)
2107  hv_store_string(pragma_hv, "strict", (SV *) newAV());
2108 
2109  ENTER;
2110  SAVETMPS;
2111  PUSHMARK(SP);
2112  EXTEND(SP, 4);
2113  PUSHs(sv_2mortal(cstr2sv(subname)));
2114  PUSHs(sv_2mortal(newRV_noinc((SV *) pragma_hv)));
2115 
2116  /*
2117  * Use 'false' for $prolog in mkfunc, which is kept for compatibility in
2118  * case a module such as PostgreSQL::PLPerl::NYTprof replaces the function
2119  * compiler.
2120  */
2121  PUSHs(&PL_sv_no);
2122  PUSHs(sv_2mortal(cstr2sv(s)));
2123  PUTBACK;
2124 
2125  /*
2126  * G_KEEPERR seems to be needed here, else we don't recognize compile
2127  * errors properly. Perhaps it's because there's another level of eval
2128  * inside mkfunc?
2129  */
2130  count = call_pv("PostgreSQL::InServer::mkfunc",
2131  G_SCALAR | G_EVAL | G_KEEPERR);
2132  SPAGAIN;
2133 
2134  if (count == 1)
2135  {
2136  SV *sub_rv = (SV *) POPs;
2137 
2138  if (sub_rv && SvROK(sub_rv) && SvTYPE(SvRV(sub_rv)) == SVt_PVCV)
2139  {
2140  subref = newRV_inc(SvRV(sub_rv));
2141  }
2142  }
2143 
2144  PUTBACK;
2145  FREETMPS;
2146  LEAVE;
2147 
2148  if (SvTRUE(ERRSV))
2149  ereport(ERROR,
2150  (errcode(ERRCODE_SYNTAX_ERROR),
2152 
2153  if (!subref)
2154  ereport(ERROR,
2155  (errcode(ERRCODE_SYNTAX_ERROR),
2156  errmsg("didn't get a CODE reference from compiling function \"%s\"",
2157  prodesc->proname)));
2158 
2159  prodesc->reference = subref;
2160 }
2161 
2162 
2163 /**********************************************************************
2164  * plperl_init_shared_libs() -
2165  **********************************************************************/
2166 
2167 static void
2169 {
2170  char *file = __FILE__;
2171 
2172  newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
2173  newXS("PostgreSQL::InServer::Util::bootstrap",
2175  /* newXS for...::SPI::bootstrap is in select_perl_context() */
2176 }
2177 
2178 
2179 static SV *
2181 {
2182  dTHX;
2183  dSP;
2184  SV *retval;
2185  int i;
2186  int count;
2187  Oid *argtypes = NULL;
2188  int nargs = 0;
2189 
2190  ENTER;
2191  SAVETMPS;
2192 
2193  PUSHMARK(SP);
2194  EXTEND(sp, desc->nargs);
2195 
2196  /* Get signature for true functions; inline blocks have no args. */
2197  if (fcinfo->flinfo->fn_oid)
2198  get_func_signature(fcinfo->flinfo->fn_oid, &argtypes, &nargs);
2199  Assert(nargs == desc->nargs);
2200 
2201  for (i = 0; i < desc->nargs; i++)
2202  {
2203  if (fcinfo->args[i].isnull)
2204  PUSHs(&PL_sv_undef);
2205  else if (desc->arg_is_rowtype[i])
2206  {
2207  SV *sv = plperl_hash_from_datum(fcinfo->args[i].value);
2208 
2209  PUSHs(sv_2mortal(sv));
2210  }
2211  else
2212  {
2213  SV *sv;
2214  Oid funcid;
2215 
2216  if (OidIsValid(desc->arg_arraytype[i]))
2217  sv = plperl_ref_from_pg_array(fcinfo->args[i].value, desc->arg_arraytype[i]);
2219  sv = (SV *) DatumGetPointer(OidFunctionCall1(funcid, fcinfo->args[i].value));
2220  else
2221  {
2222  char *tmp;
2223 
2224  tmp = OutputFunctionCall(&(desc->arg_out_func[i]),
2225  fcinfo->args[i].value);
2226  sv = cstr2sv(tmp);
2227  pfree(tmp);
2228  }
2229 
2230  PUSHs(sv_2mortal(sv));
2231  }
2232  }
2233  PUTBACK;
2234 
2235  /* Do NOT use G_KEEPERR here */
2236  count = call_sv(desc->reference, G_SCALAR | G_EVAL);
2237 
2238  SPAGAIN;
2239 
2240  if (count != 1)
2241  {
2242  PUTBACK;
2243  FREETMPS;
2244  LEAVE;
2245  ereport(ERROR,
2246  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2247  errmsg("didn't get a return item from function")));
2248  }
2249 
2250  if (SvTRUE(ERRSV))
2251  {
2252  (void) POPs;
2253  PUTBACK;
2254  FREETMPS;
2255  LEAVE;
2256  /* XXX need to find a way to determine a better errcode here */
2257  ereport(ERROR,
2258  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2260  }
2261 
2262  retval = newSVsv(POPs);
2263 
2264  PUTBACK;
2265  FREETMPS;
2266  LEAVE;
2267 
2268  return retval;
2269 }
2270 
2271 
2272 static SV *
2274  SV *td)
2275 {
2276  dTHX;
2277  dSP;
2278  SV *retval,
2279  *TDsv;
2280  int i,
2281  count;
2282  Trigger *tg_trigger = ((TriggerData *) fcinfo->context)->tg_trigger;
2283 
2284  ENTER;
2285  SAVETMPS;
2286 
2287  TDsv = get_sv("main::_TD", 0);
2288  if (!TDsv)
2289  ereport(ERROR,
2290  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2291  errmsg("couldn't fetch $_TD")));
2292 
2293  save_item(TDsv); /* local $_TD */
2294  sv_setsv(TDsv, td);
2295 
2296  PUSHMARK(sp);
2297  EXTEND(sp, tg_trigger->tgnargs);
2298 
2299  for (i = 0; i < tg_trigger->tgnargs; i++)
2300  PUSHs(sv_2mortal(cstr2sv(tg_trigger->tgargs[i])));
2301  PUTBACK;
2302 
2303  /* Do NOT use G_KEEPERR here */
2304  count = call_sv(desc->reference, G_SCALAR | G_EVAL);
2305 
2306  SPAGAIN;
2307 
2308  if (count != 1)
2309  {
2310  PUTBACK;
2311  FREETMPS;
2312  LEAVE;
2313  ereport(ERROR,
2314  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2315  errmsg("didn't get a return item from trigger function")));
2316  }
2317 
2318  if (SvTRUE(ERRSV))
2319  {
2320  (void) POPs;
2321  PUTBACK;
2322  FREETMPS;
2323  LEAVE;
2324  /* XXX need to find a way to determine a better errcode here */
2325  ereport(ERROR,
2326  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2328  }
2329 
2330  retval = newSVsv(POPs);
2331 
2332  PUTBACK;
2333  FREETMPS;
2334  LEAVE;
2335 
2336  return retval;
2337 }
2338 
2339 
2340 static void
2342  FunctionCallInfo fcinfo,
2343  SV *td)
2344 {
2345  dTHX;
2346  dSP;
2347  SV *retval,
2348  *TDsv;
2349  int count;
2350 
2351  ENTER;
2352  SAVETMPS;
2353 
2354  TDsv = get_sv("main::_TD", 0);
2355  if (!TDsv)
2356  ereport(ERROR,
2357  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2358  errmsg("couldn't fetch $_TD")));
2359 
2360  save_item(TDsv); /* local $_TD */
2361  sv_setsv(TDsv, td);
2362 
2363  PUSHMARK(sp);
2364  PUTBACK;
2365 
2366  /* Do NOT use G_KEEPERR here */
2367  count = call_sv(desc->reference, G_SCALAR | G_EVAL);
2368 
2369  SPAGAIN;
2370 
2371  if (count != 1)
2372  {
2373  PUTBACK;
2374  FREETMPS;
2375  LEAVE;
2376  ereport(ERROR,
2377  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2378  errmsg("didn't get a return item from trigger function")));
2379  }
2380 
2381  if (SvTRUE(ERRSV))
2382  {
2383  (void) POPs;
2384  PUTBACK;
2385  FREETMPS;
2386  LEAVE;
2387  /* XXX need to find a way to determine a better errcode here */
2388  ereport(ERROR,
2389  (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2391  }
2392 
2393  retval = newSVsv(POPs);
2394  (void) retval; /* silence compiler warning */
2395 
2396  PUTBACK;
2397  FREETMPS;
2398  LEAVE;
2399 }
2400 
2401 static Datum
2403 {
2404  bool nonatomic;
2405  plperl_proc_desc *prodesc;
2406  SV *perlret;
2407  Datum retval = 0;
2408  ReturnSetInfo *rsi;
2409  ErrorContextCallback pl_error_context;
2410 
2411  nonatomic = fcinfo->context &&
2412  IsA(fcinfo->context, CallContext) &&
2413  !castNode(CallContext, fcinfo->context)->atomic;
2414 
2415  if (SPI_connect_ext(nonatomic ? SPI_OPT_NONATOMIC : 0) != SPI_OK_CONNECT)
2416  elog(ERROR, "could not connect to SPI manager");
2417 
2418  prodesc = compile_plperl_function(fcinfo->flinfo->fn_oid, false, false);
2419  current_call_data->prodesc = prodesc;
2420  increment_prodesc_refcount(prodesc);
2421 
2422  /* Set a callback for error reporting */
2423  pl_error_context.callback = plperl_exec_callback;
2424  pl_error_context.previous = error_context_stack;
2425  pl_error_context.arg = prodesc->proname;
2426  error_context_stack = &pl_error_context;
2427 
2428  rsi = (ReturnSetInfo *) fcinfo->resultinfo;
2429 
2430  if (prodesc->fn_retisset)
2431  {
2432  /* Check context before allowing the call to go through */
2433  if (!rsi || !IsA(rsi, ReturnSetInfo))
2434  ereport(ERROR,
2435  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2436  errmsg("set-valued function called in context that cannot accept a set")));
2437 
2438  if (!(rsi->allowedModes & SFRM_Materialize))
2439  ereport(ERROR,
2440  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2441  errmsg("materialize mode required, but it is not allowed in this context")));
2442  }
2443 
2444  activate_interpreter(prodesc->interp);
2445 
2446  perlret = plperl_call_perl_func(prodesc, fcinfo);
2447 
2448  /************************************************************
2449  * Disconnect from SPI manager and then create the return
2450  * values datum (if the input function does a palloc for it
2451  * this must not be allocated in the SPI memory context
2452  * because SPI_finish would free it).
2453  ************************************************************/
2454  if (SPI_finish() != SPI_OK_FINISH)
2455  elog(ERROR, "SPI_finish() failed");
2456 
2457  if (prodesc->fn_retisset)
2458  {
2459  SV *sav;
2460 
2461  /*
2462  * If the Perl function returned an arrayref, we pretend that it
2463  * called return_next() for each element of the array, to handle old
2464  * SRFs that didn't know about return_next(). Any other sort of return
2465  * value is an error, except undef which means return an empty set.
2466  */
2467  sav = get_perl_array_ref(perlret);
2468  if (sav)
2469  {
2470  dTHX;
2471  int i = 0;
2472  SV **svp = 0;
2473  AV *rav = (AV *) SvRV(sav);
2474 
2475  while ((svp = av_fetch(rav, i, FALSE)) != NULL)
2476  {
2478  i++;
2479  }
2480  }
2481  else if (SvOK(perlret))
2482  {
2483  ereport(ERROR,
2484  (errcode(ERRCODE_DATATYPE_MISMATCH),
2485  errmsg("set-returning PL/Perl function must return "
2486  "reference to array or use return_next")));
2487  }
2488 
2491  {
2494  }
2495  retval = (Datum) 0;
2496  }
2497  else if (prodesc->result_oid)
2498  {
2499  retval = plperl_sv_to_datum(perlret,
2500  prodesc->result_oid,
2501  -1,
2502  fcinfo,
2503  &prodesc->result_in_func,
2504  prodesc->result_typioparam,
2505  &fcinfo->isnull);
2506 
2507  if (fcinfo->isnull && rsi && IsA(rsi, ReturnSetInfo))
2508  rsi->isDone = ExprEndResult;
2509  }
2510 
2511  /* Restore the previous error callback */
2512  error_context_stack = pl_error_context.previous;
2513 
2514  SvREFCNT_dec_current(perlret);
2515 
2516  return retval;
2517 }
2518 
2519 
2520 static Datum
2522 {
2523  plperl_proc_desc *prodesc;
2524  SV *perlret;
2525  Datum retval;
2526  SV *svTD;
2527  HV *hvTD;
2528  ErrorContextCallback pl_error_context;
2529  TriggerData *tdata;
2530  int rc PG_USED_FOR_ASSERTS_ONLY;
2531 
2532  /* Connect to SPI manager */
2533  if (SPI_connect() != SPI_OK_CONNECT)
2534  elog(ERROR, "could not connect to SPI manager");
2535 
2536  /* Make transition tables visible to this SPI connection */
2537  tdata = (TriggerData *) fcinfo->context;
2538  rc = SPI_register_trigger_data(tdata);
2539  Assert(rc >= 0);
2540 
2541  /* Find or compile the function */
2542  prodesc = compile_plperl_function(fcinfo->flinfo->fn_oid, true, false);
2543  current_call_data->prodesc = prodesc;
2544  increment_prodesc_refcount(prodesc);
2545 
2546  /* Set a callback for error reporting */
2547  pl_error_context.callback = plperl_exec_callback;
2548  pl_error_context.previous = error_context_stack;
2549  pl_error_context.arg = prodesc->proname;
2550  error_context_stack = &pl_error_context;
2551 
2552  activate_interpreter(prodesc->interp);
2553 
2554  svTD = plperl_trigger_build_args(fcinfo);
2555  perlret = plperl_call_perl_trigger_func(prodesc, fcinfo, svTD);
2556  hvTD = (HV *) SvRV(svTD);
2557 
2558  /************************************************************
2559  * Disconnect from SPI manager and then create the return
2560  * values datum (if the input function does a palloc for it
2561  * this must not be allocated in the SPI memory context
2562  * because SPI_finish would free it).
2563  ************************************************************/
2564  if (SPI_finish() != SPI_OK_FINISH)
2565  elog(ERROR, "SPI_finish() failed");
2566 
2567  if (perlret == NULL || !SvOK(perlret))
2568  {
2569  /* undef result means go ahead with original tuple */
2570  TriggerData *trigdata = ((TriggerData *) fcinfo->context);
2571 
2572  if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
2573  retval = (Datum) trigdata->tg_trigtuple;
2574  else if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
2575  retval = (Datum) trigdata->tg_newtuple;
2576  else if (TRIGGER_FIRED_BY_DELETE(trigdata->tg_event))
2577  retval = (Datum) trigdata->tg_trigtuple;
2578  else if (TRIGGER_FIRED_BY_TRUNCATE(trigdata->tg_event))
2579  retval = (Datum) trigdata->tg_trigtuple;
2580  else
2581  retval = (Datum) 0; /* can this happen? */
2582  }
2583  else
2584  {
2585  HeapTuple trv;
2586  char *tmp;
2587 
2588  tmp = sv2cstr(perlret);
2589 
2590  if (pg_strcasecmp(tmp, "SKIP") == 0)
2591  trv = NULL;
2592  else if (pg_strcasecmp(tmp, "MODIFY") == 0)
2593  {
2594  TriggerData *trigdata = (TriggerData *) fcinfo->context;
2595 
2596  if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
2597  trv = plperl_modify_tuple(hvTD, trigdata,
2598  trigdata->tg_trigtuple);
2599  else if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
2600  trv = plperl_modify_tuple(hvTD, trigdata,
2601  trigdata->tg_newtuple);
2602  else
2603  {
2604  ereport(WARNING,
2605  (errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
2606  errmsg("ignoring modified row in DELETE trigger")));
2607  trv = NULL;
2608  }
2609  }
2610  else
2611  {
2612  ereport(ERROR,
2613  (errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
2614  errmsg("result of PL/Perl trigger function must be undef, "
2615  "\"SKIP\", or \"MODIFY\"")));
2616  trv = NULL;
2617  }
2618  retval = PointerGetDatum(trv);
2619  pfree(tmp);
2620  }
2621 
2622  /* Restore the previous error callback */
2623  error_context_stack = pl_error_context.previous;
2624 
2625  SvREFCNT_dec_current(svTD);
2626  if (perlret)
2627  SvREFCNT_dec_current(perlret);
2628 
2629  return retval;
2630 }
2631 
2632 
2633 static void
2635 {
2636  plperl_proc_desc *prodesc;
2637  SV *svTD;
2638  ErrorContextCallback pl_error_context;
2639 
2640  /* Connect to SPI manager */
2641  if (SPI_connect() != SPI_OK_CONNECT)
2642  elog(ERROR, "could not connect to SPI manager");
2643 
2644  /* Find or compile the function */
2645  prodesc = compile_plperl_function(fcinfo->flinfo->fn_oid, false, true);
2646  current_call_data->prodesc = prodesc;
2647  increment_prodesc_refcount(prodesc);
2648 
2649  /* Set a callback for error reporting */
2650  pl_error_context.callback = plperl_exec_callback;
2651  pl_error_context.previous = error_context_stack;
2652  pl_error_context.arg = prodesc->proname;
2653  error_context_stack = &pl_error_context;
2654 
2655  activate_interpreter(prodesc->interp);
2656 
2657  svTD = plperl_event_trigger_build_args(fcinfo);
2658  plperl_call_perl_event_trigger_func(prodesc, fcinfo, svTD);
2659 
2660  if (SPI_finish() != SPI_OK_FINISH)
2661  elog(ERROR, "SPI_finish() failed");
2662 
2663  /* Restore the previous error callback */
2664  error_context_stack = pl_error_context.previous;
2665 
2666  SvREFCNT_dec_current(svTD);
2667 }
2668 
2669 
2670 static bool
2672 {
2673  if (proc_ptr && proc_ptr->proc_ptr)
2674  {
2675  plperl_proc_desc *prodesc = proc_ptr->proc_ptr;
2676  bool uptodate;
2677 
2678  /************************************************************
2679  * If it's present, must check whether it's still up to date.
2680  * This is needed because CREATE OR REPLACE FUNCTION can modify the
2681  * function's pg_proc entry without changing its OID.
2682  ************************************************************/
2683  uptodate = (prodesc->fn_xmin == HeapTupleHeaderGetRawXmin(procTup->t_data) &&
2684  ItemPointerEquals(&prodesc->fn_tid, &procTup->t_self));
2685 
2686  if (uptodate)
2687  return true;
2688 
2689  /* Otherwise, unlink the obsoleted entry from the hashtable ... */
2690  proc_ptr->proc_ptr = NULL;
2691  /* ... and release the corresponding refcount, probably deleting it */
2692  decrement_prodesc_refcount(prodesc);
2693  }
2694 
2695  return false;
2696 }
2697 
2698 
2699 static void
2701 {
2702  Assert(prodesc->fn_refcount == 0);
2703  /* Release CODE reference, if we have one, from the appropriate interp */
2704  if (prodesc->reference)
2705  {
2707 
2708  activate_interpreter(prodesc->interp);
2709  SvREFCNT_dec_current(prodesc->reference);
2710  activate_interpreter(oldinterp);
2711  }
2712  /* Release all PG-owned data for this proc */
2713  MemoryContextDelete(prodesc->fn_cxt);
2714 }
2715 
2716 
2717 static plperl_proc_desc *
2718 compile_plperl_function(Oid fn_oid, bool is_trigger, bool is_event_trigger)
2719 {
2720  HeapTuple procTup;
2721  Form_pg_proc procStruct;
2722  plperl_proc_key proc_key;
2723  plperl_proc_ptr *proc_ptr;
2724  plperl_proc_desc *volatile prodesc = NULL;
2725  volatile MemoryContext proc_cxt = NULL;
2727  ErrorContextCallback plperl_error_context;
2728 
2729  /* We'll need the pg_proc tuple in any case... */
2730  procTup = SearchSysCache1(PROCOID, ObjectIdGetDatum(fn_oid));
2731  if (!HeapTupleIsValid(procTup))
2732  elog(ERROR, "cache lookup failed for function %u", fn_oid);
2733  procStruct = (Form_pg_proc) GETSTRUCT(procTup);
2734 
2735  /*
2736  * Try to find function in plperl_proc_hash. The reason for this
2737  * overcomplicated-seeming lookup procedure is that we don't know whether
2738  * it's plperl or plperlu, and don't want to spend a lookup in pg_language
2739  * to find out.
2740  */
2741  proc_key.proc_id = fn_oid;
2742  proc_key.is_trigger = is_trigger;
2743  proc_key.user_id = GetUserId();
2744  proc_ptr = hash_search(plperl_proc_hash, &proc_key,
2745  HASH_FIND, NULL);
2746  if (validate_plperl_function(proc_ptr, procTup))
2747  {
2748  /* Found valid plperl entry */
2749  ReleaseSysCache(procTup);
2750  return proc_ptr->proc_ptr;
2751  }
2752 
2753  /* If not found or obsolete, maybe it's plperlu */
2754  proc_key.user_id = InvalidOid;
2755  proc_ptr = hash_search(plperl_proc_hash, &proc_key,
2756  HASH_FIND, NULL);
2757  if (validate_plperl_function(proc_ptr, procTup))
2758  {
2759  /* Found valid plperlu entry */
2760  ReleaseSysCache(procTup);
2761  return proc_ptr->proc_ptr;
2762  }
2763 
2764  /************************************************************
2765  * If we haven't found it in the hashtable, we analyze
2766  * the function's arguments and return type and store
2767  * the in-/out-functions in the prodesc block,
2768  * then we load the procedure into the Perl interpreter,
2769  * and last we create a new hashtable entry for it.
2770  ************************************************************/
2771 
2772  /* Set a callback for reporting compilation errors */
2773  plperl_error_context.callback = plperl_compile_callback;
2774  plperl_error_context.previous = error_context_stack;
2775  plperl_error_context.arg = NameStr(procStruct->proname);
2776  error_context_stack = &plperl_error_context;
2777 
2778  PG_TRY();
2779  {
2780  HeapTuple langTup;
2781  HeapTuple typeTup;
2782  Form_pg_language langStruct;
2783  Form_pg_type typeStruct;
2784  Datum protrftypes_datum;
2785  Datum prosrcdatum;
2786  bool isnull;
2787  char *proc_source;
2788  MemoryContext oldcontext;
2789 
2790  /************************************************************
2791  * Allocate a context that will hold all PG data for the procedure.
2792  ************************************************************/
2794  "PL/Perl function",
2796 
2797  /************************************************************
2798  * Allocate and fill a new procedure description block.
2799  * struct prodesc and subsidiary data must all live in proc_cxt.
2800  ************************************************************/
2801  oldcontext = MemoryContextSwitchTo(proc_cxt);
2802  prodesc = (plperl_proc_desc *) palloc0(sizeof(plperl_proc_desc));
2803  prodesc->proname = pstrdup(NameStr(procStruct->proname));
2804  MemoryContextSetIdentifier(proc_cxt, prodesc->proname);
2805  prodesc->fn_cxt = proc_cxt;
2806  prodesc->fn_refcount = 0;
2807  prodesc->fn_xmin = HeapTupleHeaderGetRawXmin(procTup->t_data);
2808  prodesc->fn_tid = procTup->t_self;
2809  prodesc->nargs = procStruct->pronargs;
2810  prodesc->arg_out_func = (FmgrInfo *) palloc0(prodesc->nargs * sizeof(FmgrInfo));
2811  prodesc->arg_is_rowtype = (bool *) palloc0(prodesc->nargs * sizeof(bool));
2812  prodesc->arg_arraytype = (Oid *) palloc0(prodesc->nargs * sizeof(Oid));
2813  MemoryContextSwitchTo(oldcontext);
2814 
2815  /* Remember if function is STABLE/IMMUTABLE */
2816  prodesc->fn_readonly =
2817  (procStruct->provolatile != PROVOLATILE_VOLATILE);
2818 
2819  /* Fetch protrftypes */
2820  protrftypes_datum = SysCacheGetAttr(PROCOID, procTup,
2821  Anum_pg_proc_protrftypes, &isnull);
2822  MemoryContextSwitchTo(proc_cxt);
2823  prodesc->trftypes = isnull ? NIL : oid_array_to_list(protrftypes_datum);
2824  MemoryContextSwitchTo(oldcontext);
2825 
2826  /************************************************************
2827  * Lookup the pg_language tuple by Oid
2828  ************************************************************/
2829  langTup = SearchSysCache1(LANGOID,
2830  ObjectIdGetDatum(procStruct->prolang));
2831  if (!HeapTupleIsValid(langTup))
2832  elog(ERROR, "cache lookup failed for language %u",
2833  procStruct->prolang);
2834  langStruct = (Form_pg_language) GETSTRUCT(langTup);
2835  prodesc->lang_oid = langStruct->oid;
2836  prodesc->lanpltrusted = langStruct->lanpltrusted;
2837  ReleaseSysCache(langTup);
2838 
2839  /************************************************************
2840  * Get the required information for input conversion of the
2841  * return value.
2842  ************************************************************/
2843  if (!is_trigger && !is_event_trigger)
2844  {
2845  Oid rettype = procStruct->prorettype;
2846 
2847  typeTup = SearchSysCache1(TYPEOID, ObjectIdGetDatum(rettype));
2848  if (!HeapTupleIsValid(typeTup))
2849  elog(ERROR, "cache lookup failed for type %u", rettype);
2850  typeStruct = (Form_pg_type) GETSTRUCT(typeTup);
2851 
2852  /* Disallow pseudotype result, except VOID or RECORD */
2853  if (typeStruct->typtype == TYPTYPE_PSEUDO)
2854  {
2855  if (rettype == VOIDOID ||
2856  rettype == RECORDOID)
2857  /* okay */ ;
2858  else if (rettype == TRIGGEROID ||
2859  rettype == EVENT_TRIGGEROID)
2860  ereport(ERROR,
2861  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2862  errmsg("trigger functions can only be called "
2863  "as triggers")));
2864  else
2865  ereport(ERROR,
2866  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2867  errmsg("PL/Perl functions cannot return type %s",
2868  format_type_be(rettype))));
2869  }
2870 
2871  prodesc->result_oid = rettype;
2872  prodesc->fn_retisset = procStruct->proretset;
2873  prodesc->fn_retistuple = type_is_rowtype(rettype);
2874  prodesc->fn_retisarray = IsTrueArrayType(typeStruct);
2875 
2876  fmgr_info_cxt(typeStruct->typinput,
2877  &(prodesc->result_in_func),
2878  proc_cxt);
2879  prodesc->result_typioparam = getTypeIOParam(typeTup);
2880 
2881  ReleaseSysCache(typeTup);
2882  }
2883 
2884  /************************************************************
2885  * Get the required information for output conversion
2886  * of all procedure arguments
2887  ************************************************************/
2888  if (!is_trigger && !is_event_trigger)
2889  {
2890  int i;
2891 
2892  for (i = 0; i < prodesc->nargs; i++)
2893  {
2894  Oid argtype = procStruct->proargtypes.values[i];
2895 
2896  typeTup = SearchSysCache1(TYPEOID, ObjectIdGetDatum(argtype));
2897  if (!HeapTupleIsValid(typeTup))
2898  elog(ERROR, "cache lookup failed for type %u", argtype);
2899  typeStruct = (Form_pg_type) GETSTRUCT(typeTup);
2900 
2901  /* Disallow pseudotype argument, except RECORD */
2902  if (typeStruct->typtype == TYPTYPE_PSEUDO &&
2903  argtype != RECORDOID)
2904  ereport(ERROR,
2905  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2906  errmsg("PL/Perl functions cannot accept type %s",
2907  format_type_be(argtype))));
2908 
2909  if (type_is_rowtype(argtype))
2910  prodesc->arg_is_rowtype[i] = true;
2911  else
2912  {
2913  prodesc->arg_is_rowtype[i] = false;
2914  fmgr_info_cxt(typeStruct->typoutput,
2915  &(prodesc->arg_out_func[i]),
2916  proc_cxt);
2917  }
2918 
2919  /* Identify array-type arguments */
2920  if (IsTrueArrayType(typeStruct))
2921  prodesc->arg_arraytype[i] = argtype;
2922  else
2923  prodesc->arg_arraytype[i] = InvalidOid;
2924 
2925  ReleaseSysCache(typeTup);
2926  }
2927  }
2928 
2929  /************************************************************
2930  * create the text of the anonymous subroutine.
2931  * we do not use a named subroutine so that we can call directly
2932  * through the reference.
2933  ************************************************************/
2934  prosrcdatum = SysCacheGetAttrNotNull(PROCOID, procTup,
2935  Anum_pg_proc_prosrc);
2936  proc_source = TextDatumGetCString(prosrcdatum);
2937 
2938  /************************************************************
2939  * Create the procedure in the appropriate interpreter
2940  ************************************************************/
2941 
2943 
2944  prodesc->interp = plperl_active_interp;
2945 
2946  plperl_create_sub(prodesc, proc_source, fn_oid);
2947 
2948  activate_interpreter(oldinterp);
2949 
2950  pfree(proc_source);
2951 
2952  if (!prodesc->reference) /* can this happen? */
2953  elog(ERROR, "could not create PL/Perl internal procedure");
2954 
2955  /************************************************************
2956  * OK, link the procedure into the correct hashtable entry.
2957  * Note we assume that the hashtable entry either doesn't exist yet,
2958  * or we already cleared its proc_ptr during the validation attempts
2959  * above. So no need to decrement an old refcount here.
2960  ************************************************************/
2961  proc_key.user_id = prodesc->lanpltrusted ? GetUserId() : InvalidOid;
2962 
2963  proc_ptr = hash_search(plperl_proc_hash, &proc_key,
2964  HASH_ENTER, NULL);
2965  /* We assume these two steps can't throw an error: */
2966  proc_ptr->proc_ptr = prodesc;
2967  increment_prodesc_refcount(prodesc);
2968  }
2969  PG_CATCH();
2970  {
2971  /*
2972  * If we got as far as creating a reference, we should be able to use
2973  * free_plperl_function() to clean up. If not, then at most we have
2974  * some PG memory resources in proc_cxt, which we can just delete.
2975  */
2976  if (prodesc && prodesc->reference)
2977  free_plperl_function(prodesc);
2978  else if (proc_cxt)
2979  MemoryContextDelete(proc_cxt);
2980 
2981  /* Be sure to restore the previous interpreter, too, for luck */
2982  activate_interpreter(oldinterp);
2983 
2984  PG_RE_THROW();
2985  }
2986  PG_END_TRY();
2987 
2988  /* restore previous error callback */
2989  error_context_stack = plperl_error_context.previous;
2990 
2991  ReleaseSysCache(procTup);
2992 
2993  return prodesc;
2994 }
2995 
2996 /* Build a hash from a given composite/row datum */
2997 static SV *
2999 {
3000  HeapTupleHeader td;
3001  Oid tupType;
3002  int32 tupTypmod;
3003  TupleDesc tupdesc;
3004  HeapTupleData tmptup;
3005  SV *sv;
3006 
3007  td = DatumGetHeapTupleHeader(attr);
3008 
3009  /* Extract rowtype info and find a tupdesc */
3010  tupType = HeapTupleHeaderGetTypeId(td);
3011  tupTypmod = HeapTupleHeaderGetTypMod(td);
3012  tupdesc = lookup_rowtype_tupdesc(tupType, tupTypmod);
3013 
3014  /* Build a temporary HeapTuple control structure */
3015  tmptup.t_len = HeapTupleHeaderGetDatumLength(td);
3016  tmptup.t_data = td;
3017 
3018  sv = plperl_hash_from_tuple(&tmptup, tupdesc, true);
3019  ReleaseTupleDesc(tupdesc);
3020 
3021  return sv;
3022 }
3023 
3024 /* Build a hash from all attributes of a given tuple. */
3025 static SV *
3026 plperl_hash_from_tuple(HeapTuple tuple, TupleDesc tupdesc, bool include_generated)
3027 {
3028  dTHX;
3029  HV *hv;
3030  int i;
3031 
3032  /* since this function recurses, it could be driven to stack overflow */
3034 
3035  hv = newHV();
3036  hv_ksplit(hv, tupdesc->natts); /* pre-grow the hash */
3037 
3038  for (i = 0; i < tupdesc->natts; i++)
3039  {
3040  Datum attr;
3041  bool isnull,
3042  typisvarlena;
3043  char *attname;
3044  Oid typoutput;
3045  Form_pg_attribute att = TupleDescAttr(tupdesc, i);
3046 
3047  if (att->attisdropped)
3048  continue;
3049 
3050  if (att->attgenerated)
3051  {
3052  /* don't include unless requested */
3053  if (!include_generated)
3054  continue;
3055  }
3056 
3057  attname = NameStr(att->attname);
3058  attr = heap_getattr(tuple, i + 1, tupdesc, &isnull);
3059 
3060  if (isnull)
3061  {
3062  /*
3063  * Store (attname => undef) and move on. Note we can't use
3064  * &PL_sv_undef here; see "AVs, HVs and undefined values" in
3065  * perlguts for an explanation.
3066  */
3067  hv_store_string(hv, attname, newSV(0));
3068  continue;
3069  }
3070 
3071  if (type_is_rowtype(att->atttypid))
3072  {
3073  SV *sv = plperl_hash_from_datum(attr);
3074 
3075  hv_store_string(hv, attname, sv);
3076  }
3077  else
3078  {
3079  SV *sv;
3080  Oid funcid;
3081 
3082  if (OidIsValid(get_base_element_type(att->atttypid)))
3083  sv = plperl_ref_from_pg_array(attr, att->atttypid);
3085  sv = (SV *) DatumGetPointer(OidFunctionCall1(funcid, attr));
3086  else
3087  {
3088  char *outputstr;
3089 
3090  /* XXX should have a way to cache these lookups */
3091  getTypeOutputInfo(att->atttypid, &typoutput, &typisvarlena);
3092 
3093  outputstr = OidOutputFunctionCall(typoutput, attr);
3094  sv = cstr2sv(outputstr);
3095  pfree(outputstr);
3096  }
3097 
3098  hv_store_string(hv, attname, sv);
3099  }
3100  }
3101  return newRV_noinc((SV *) hv);
3102 }
3103 
3104 
3105 static void
3107 {
3108  /* see comment in plperl_fini() */
3109  if (plperl_ending)
3110  {
3111  /* simple croak as we don't want to involve PostgreSQL code */
3112  croak("SPI functions can not be used in END blocks");
3113  }
3114 
3115  /*
3116  * Disallow SPI usage if we're not executing a fully-compiled plperl
3117  * function. It might seem impossible to get here in that case, but there
3118  * are cases where Perl will try to execute code during compilation. If
3119  * we proceed we are likely to crash trying to dereference the prodesc
3120  * pointer. Working around that might be possible, but it seems unwise
3121  * because it'd allow code execution to happen while validating a
3122  * function, which is undesirable.
3123  */
3124  if (current_call_data == NULL || current_call_data->prodesc == NULL)
3125  {
3126  /* simple croak as we don't want to involve PostgreSQL code */
3127  croak("SPI functions can not be used during function compilation");
3128  }
3129 }
3130 
3131 
3132 HV *
3133 plperl_spi_exec(char *query, int limit)
3134 {
3135  HV *ret_hv;
3136 
3137  /*
3138  * Execute the query inside a sub-transaction, so we can cope with errors
3139  * sanely
3140  */
3141  MemoryContext oldcontext = CurrentMemoryContext;
3143 
3145 
3147  /* Want to run inside function's memory context */
3148  MemoryContextSwitchTo(oldcontext);
3149 
3150  PG_TRY();
3151  {
3152  int spi_rv;
3153 
3154  pg_verifymbstr(query, strlen(query), false);
3155 
3157  limit);
3159  spi_rv);
3160 
3161  /* Commit the inner transaction, return to outer xact context */
3163  MemoryContextSwitchTo(oldcontext);
3164  CurrentResourceOwner = oldowner;
3165  }
3166  PG_CATCH();
3167  {
3168  ErrorData *edata;
3169 
3170  /* Save error info */
3171  MemoryContextSwitchTo(oldcontext);
3172  edata = CopyErrorData();
3173  FlushErrorState();
3174 
3175  /* Abort the inner transaction */
3177  MemoryContextSwitchTo(oldcontext);
3178  CurrentResourceOwner = oldowner;
3179 
3180  /* Punt the error to Perl */
3181  croak_cstr(edata->message);
3182 
3183  /* Can't get here, but keep compiler quiet */
3184  return NULL;
3185  }
3186  PG_END_TRY();
3187 
3188  return ret_hv;
3189 }
3190 
3191 
3192 static HV *
3194  int status)
3195 {
3196  dTHX;
3197  HV *result;
3198 
3200 
3201  result = newHV();
3202 
3203  hv_store_string(result, "status",
3204  cstr2sv(SPI_result_code_string(status)));
3205  hv_store_string(result, "processed",
3206  (processed > (uint64) UV_MAX) ?
3207  newSVnv((NV) processed) :
3208  newSVuv((UV) processed));
3209 
3210  if (status > 0 && tuptable)
3211  {
3212  AV *rows;
3213  SV *row;
3214  uint64 i;
3215 
3216  /* Prevent overflow in call to av_extend() */
3217  if (processed > (uint64) AV_SIZE_MAX)
3218  ereport(ERROR,
3219  (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
3220  errmsg("query result has too many rows to fit in a Perl array")));
3221 
3222  rows = newAV();
3223  av_extend(rows, processed);
3224  for (i = 0; i < processed; i++)
3225  {
3226  row = plperl_hash_from_tuple(tuptable->vals[i], tuptable->tupdesc, true);
3227  av_push(rows, row);
3228  }
3229  hv_store_string(result, "rows",
3230  newRV_noinc((SV *) rows));
3231  }
3232 
3233  SPI_freetuptable(tuptable);
3234 
3235  return result;
3236 }
3237 
3238 
3239 /*
3240  * plperl_return_next catches any error and converts it to a Perl error.
3241  * We assume (perhaps without adequate justification) that we need not abort
3242  * the current transaction if the Perl code traps the error.
3243  */
3244 void
3246 {
3247  MemoryContext oldcontext = CurrentMemoryContext;
3248 
3250 
3251  PG_TRY();
3252  {
3254  }
3255  PG_CATCH();
3256  {
3257  ErrorData *edata;
3258 
3259  /* Must reset elog.c's state */
3260  MemoryContextSwitchTo(oldcontext);
3261  edata = CopyErrorData();
3262  FlushErrorState();
3263 
3264  /* Punt the error to Perl */
3265  croak_cstr(edata->message);
3266  }
3267  PG_END_TRY();
3268 }
3269 
3270 /*
3271  * plperl_return_next_internal reports any errors in Postgres fashion
3272  * (via ereport).
3273  */
3274 static void
3276 {
3277  plperl_proc_desc *prodesc;
3278  FunctionCallInfo fcinfo;
3279  ReturnSetInfo *rsi;
3280  MemoryContext old_cxt;
3281 
3282  if (!sv)
3283  return;
3284 
3285  prodesc = current_call_data->prodesc;
3286  fcinfo = current_call_data->fcinfo;
3287  rsi = (ReturnSetInfo *) fcinfo->resultinfo;
3288 
3289  if (!prodesc->fn_retisset)
3290  ereport(ERROR,
3291  (errcode(ERRCODE_SYNTAX_ERROR),
3292  errmsg("cannot use return_next in a non-SETOF function")));
3293 
3295  {
3296  TupleDesc tupdesc;
3297 
3299 
3300  /*
3301  * This is the first call to return_next in the current PL/Perl
3302  * function call, so identify the output tuple type and create a
3303  * tuplestore to hold the result rows.
3304  */
3305  if (prodesc->fn_retistuple)
3306  {
3307  TypeFuncClass funcclass;
3308  Oid typid;
3309 
3310  funcclass = get_call_result_type(fcinfo, &typid, &tupdesc);
3311  if (funcclass != TYPEFUNC_COMPOSITE &&
3312  funcclass != TYPEFUNC_COMPOSITE_DOMAIN)
3313  ereport(ERROR,
3314  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
3315  errmsg("function returning record called in context "
3316  "that cannot accept type record")));
3317  /* if domain-over-composite, remember the domain's type OID */
3318  if (funcclass == TYPEFUNC_COMPOSITE_DOMAIN)
3319  current_call_data->cdomain_oid = typid;
3320  }
3321  else
3322  {
3323  tupdesc = rsi->expectedDesc;
3324  /* Protect assumption below that we return exactly one column */
3325  if (tupdesc == NULL || tupdesc->natts != 1)
3326  elog(ERROR, "expected single-column result descriptor for non-composite SETOF result");
3327  }
3328 
3329  /*
3330  * Make sure the tuple_store and ret_tdesc are sufficiently
3331  * long-lived.
3332  */
3334 
3338  false, work_mem);
3339 
3340  MemoryContextSwitchTo(old_cxt);
3341  }
3342 
3343  /*
3344  * Producing the tuple we want to return requires making plenty of
3345  * palloc() allocations that are not cleaned up. Since this function can
3346  * be called many times before the current memory context is reset, we
3347  * need to do those allocations in a temporary context.
3348  */
3349  if (!current_call_data->tmp_cxt)
3350  {
3353  "PL/Perl return_next temporary cxt",
3355  }
3356 
3358 
3359  if (prodesc->fn_retistuple)
3360  {
3361  HeapTuple tuple;
3362 
3363  if (!(SvOK(sv) && SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVHV))
3364  ereport(ERROR,
3365  (errcode(ERRCODE_DATATYPE_MISMATCH),
3366  errmsg("SETOF-composite-returning PL/Perl function "
3367  "must call return_next with reference to hash")));
3368 
3369  tuple = plperl_build_tuple_result((HV *) SvRV(sv),
3371 
3373  domain_check(HeapTupleGetDatum(tuple), false,
3377 
3379  }
3380  else if (prodesc->result_oid)
3381  {
3382  Datum ret[1];
3383  bool isNull[1];
3384 
3385  ret[0] = plperl_sv_to_datum(sv,
3386  prodesc->result_oid,
3387  -1,
3388  fcinfo,
3389  &prodesc->result_in_func,
3390  prodesc->result_typioparam,
3391  &isNull[0]);
3392 
3395  ret, isNull);
3396  }
3397 
3398  MemoryContextSwitchTo(old_cxt);
3400 }
3401 
3402 
3403 SV *
3404 plperl_spi_query(char *query)
3405 {
3406  SV *cursor;
3407 
3408  /*
3409  * Execute the query inside a sub-transaction, so we can cope with errors
3410  * sanely
3411  */
3412  MemoryContext oldcontext = CurrentMemoryContext;
3414 
3416 
3418  /* Want to run inside function's memory context */
3419  MemoryContextSwitchTo(oldcontext);
3420 
3421  PG_TRY();
3422  {
3423  SPIPlanPtr plan;
3424  Portal portal;
3425 
3426  /* Make sure the query is validly encoded */
3427  pg_verifymbstr(query, strlen(query), false);
3428 
3429  /* Create a cursor for the query */
3430  plan = SPI_prepare(query, 0, NULL);
3431  if (plan == NULL)
3432  elog(ERROR, "SPI_prepare() failed:%s",
3434 
3435  portal = SPI_cursor_open(NULL, plan, NULL, NULL, false);
3436  SPI_freeplan(plan);
3437  if (portal == NULL)
3438  elog(ERROR, "SPI_cursor_open() failed:%s",
3440  cursor = cstr2sv(portal->name);
3441 
3442  PinPortal(portal);
3443 
3444  /* Commit the inner transaction, return to outer xact context */
3446  MemoryContextSwitchTo(oldcontext);
3447  CurrentResourceOwner = oldowner;
3448  }
3449  PG_CATCH();
3450  {
3451  ErrorData *edata;
3452 
3453  /* Save error info */
3454  MemoryContextSwitchTo(oldcontext);
3455  edata = CopyErrorData();
3456  FlushErrorState();
3457 
3458  /* Abort the inner transaction */
3460  MemoryContextSwitchTo(oldcontext);
3461  CurrentResourceOwner = oldowner;
3462 
3463  /* Punt the error to Perl */
3464  croak_cstr(edata->message);
3465 
3466  /* Can't get here, but keep compiler quiet */
3467  return NULL;
3468  }
3469  PG_END_TRY();
3470 
3471  return cursor;
3472 }
3473 
3474 
3475 SV *
3477 {
3478  SV *row;
3479 
3480  /*
3481  * Execute the FETCH inside a sub-transaction, so we can cope with errors
3482  * sanely
3483  */
3484  MemoryContext oldcontext = CurrentMemoryContext;
3486 
3488 
3490  /* Want to run inside function's memory context */
3491  MemoryContextSwitchTo(oldcontext);
3492 
3493  PG_TRY();
3494  {
3495  dTHX;
3497 
3498  if (!p)
3499  {
3500  row = &PL_sv_undef;
3501  }
3502  else
3503  {
3504  SPI_cursor_fetch(p, true, 1);
3505  if (SPI_processed == 0)
3506  {
3507  UnpinPortal(p);
3508  SPI_cursor_close(p);
3509  row = &PL_sv_undef;
3510  }
3511  else
3512  {
3515  true);
3516  }
3518  }
3519 
3520  /* Commit the inner transaction, return to outer xact context */
3522  MemoryContextSwitchTo(oldcontext);
3523  CurrentResourceOwner = oldowner;
3524  }
3525  PG_CATCH();
3526  {
3527  ErrorData *edata;
3528 
3529  /* Save error info */
3530  MemoryContextSwitchTo(oldcontext);
3531  edata = CopyErrorData();
3532  FlushErrorState();
3533 
3534  /* Abort the inner transaction */
3536  MemoryContextSwitchTo(oldcontext);
3537  CurrentResourceOwner = oldowner;
3538 
3539  /* Punt the error to Perl */
3540  croak_cstr(edata->message);
3541 
3542  /* Can't get here, but keep compiler quiet */
3543  return NULL;
3544  }
3545  PG_END_TRY();
3546 
3547  return row;
3548 }
3549 
3550 void
3552 {
3553  Portal p;
3554 
3556 
3557  p = SPI_cursor_find(cursor);
3558 
3559  if (p)
3560  {
3561  UnpinPortal(p);
3562  SPI_cursor_close(p);
3563  }
3564 }
3565 
3566 SV *
3567 plperl_spi_prepare(char *query, int argc, SV **argv)
3568 {
3569  volatile SPIPlanPtr plan = NULL;
3570  volatile MemoryContext plan_cxt = NULL;
3571  plperl_query_desc *volatile qdesc = NULL;
3572  plperl_query_entry *volatile hash_entry = NULL;
3573  MemoryContext oldcontext = CurrentMemoryContext;
3575  MemoryContext work_cxt;
3576  bool found;
3577  int i;
3578 
3580 
3582  MemoryContextSwitchTo(oldcontext);
3583 
3584  PG_TRY();
3585  {
3587 
3588  /************************************************************
3589  * Allocate the new querydesc structure
3590  *
3591  * The qdesc struct, as well as all its subsidiary data, lives in its
3592  * plan_cxt. But note that the SPIPlan does not.
3593  ************************************************************/
3595  "PL/Perl spi_prepare query",
3597  MemoryContextSwitchTo(plan_cxt);
3598  qdesc = (plperl_query_desc *) palloc0(sizeof(plperl_query_desc));
3599  snprintf(qdesc->qname, sizeof(qdesc->qname), "%p", qdesc);
3600  qdesc->plan_cxt = plan_cxt;
3601  qdesc->nargs = argc;
3602  qdesc->argtypes = (Oid *) palloc(argc * sizeof(Oid));
3603  qdesc->arginfuncs = (FmgrInfo *) palloc(argc * sizeof(FmgrInfo));
3604  qdesc->argtypioparams = (Oid *) palloc(argc * sizeof(Oid));
3605  MemoryContextSwitchTo(oldcontext);
3606 
3607  /************************************************************
3608  * Do the following work in a short-lived context so that we don't
3609  * leak a lot of memory in the PL/Perl function's SPI Proc context.
3610  ************************************************************/
3612  "PL/Perl spi_prepare workspace",
3614  MemoryContextSwitchTo(work_cxt);
3615 
3616  /************************************************************
3617  * Resolve argument type names and then look them up by oid
3618  * in the system cache, and remember the required information
3619  * for input conversion.
3620  ************************************************************/
3621  for (i = 0; i < argc; i++)
3622  {
3623  Oid typId,
3624  typInput,
3625  typIOParam;
3626  int32 typmod;
3627  char *typstr;
3628 
3629  typstr = sv2cstr(argv[i]);
3630  (void) parseTypeString(typstr, &typId, &typmod, NULL);
3631  pfree(typstr);
3632 
3633  getTypeInputInfo(typId, &typInput, &typIOParam);
3634 
3635  qdesc->argtypes[i] = typId;
3636  fmgr_info_cxt(typInput, &(qdesc->arginfuncs[i]), plan_cxt);
3637  qdesc->argtypioparams[i] = typIOParam;
3638  }
3639 
3640  /* Make sure the query is validly encoded */
3641  pg_verifymbstr(query, strlen(query), false);
3642 
3643  /************************************************************
3644  * Prepare the plan and check for errors
3645  ************************************************************/
3646  plan = SPI_prepare(query, argc, qdesc->argtypes);
3647 
3648  if (plan == NULL)
3649  elog(ERROR, "SPI_prepare() failed:%s",
3651 
3652  /************************************************************
3653  * Save the plan into permanent memory (right now it's in the
3654  * SPI procCxt, which will go away at function end).
3655  ************************************************************/
3656  if (SPI_keepplan(plan))
3657  elog(ERROR, "SPI_keepplan() failed");
3658  qdesc->plan = plan;
3659 
3660  /************************************************************
3661  * Insert a hashtable entry for the plan.
3662  ************************************************************/
3664  qdesc->qname,
3665  HASH_ENTER, &found);
3666  hash_entry->query_data = qdesc;
3667 
3668  /* Get rid of workspace */
3669  MemoryContextDelete(work_cxt);
3670 
3671  /* Commit the inner transaction, return to outer xact context */
3673  MemoryContextSwitchTo(oldcontext);
3674  CurrentResourceOwner = oldowner;
3675  }
3676  PG_CATCH();
3677  {
3678  ErrorData *edata;
3679 
3680  /* Save error info */
3681  MemoryContextSwitchTo(oldcontext);
3682  edata = CopyErrorData();
3683  FlushErrorState();
3684 
3685  /* Drop anything we managed to allocate */
3686  if (hash_entry)
3688  qdesc->qname,
3689  HASH_REMOVE, NULL);
3690  if (plan_cxt)
3691  MemoryContextDelete(plan_cxt);
3692  if (plan)
3693  SPI_freeplan(plan);
3694 
3695  /* Abort the inner transaction */
3697  MemoryContextSwitchTo(oldcontext);
3698  CurrentResourceOwner = oldowner;
3699 
3700  /* Punt the error to Perl */
3701  croak_cstr(edata->message);
3702 
3703  /* Can't get here, but keep compiler quiet */
3704  return NULL;
3705  }
3706  PG_END_TRY();
3707 
3708  /************************************************************
3709  * Return the query's hash key to the caller.
3710  ************************************************************/
3711  return cstr2sv(qdesc->qname);
3712 }
3713 
3714 HV *
3715 plperl_spi_exec_prepared(char *query, HV *attr, int argc, SV **argv)
3716 {
3717  HV *ret_hv;
3718  SV **sv;
3719  int i,
3720  limit,
3721  spi_rv;
3722  char *nulls;
3723  Datum *argvalues;
3724  plperl_query_desc *qdesc;
3725  plperl_query_entry *hash_entry;
3726 
3727  /*
3728  * Execute the query inside a sub-transaction, so we can cope with errors
3729  * sanely
3730  */
3731  MemoryContext oldcontext = CurrentMemoryContext;
3733 
3735 
3737  /* Want to run inside function's memory context */
3738  MemoryContextSwitchTo(oldcontext);
3739 
3740  PG_TRY();
3741  {
3742  dTHX;
3743 
3744  /************************************************************
3745  * Fetch the saved plan descriptor, see if it's o.k.
3746  ************************************************************/
3747  hash_entry = hash_search(plperl_active_interp->query_hash, query,
3748  HASH_FIND, NULL);
3749  if (hash_entry == NULL)
3750  elog(ERROR, "spi_exec_prepared: Invalid prepared query passed");
3751 
3752  qdesc = hash_entry->query_data;
3753  if (qdesc == NULL)
3754  elog(ERROR, "spi_exec_prepared: plperl query_hash value vanished");
3755 
3756  if (qdesc->nargs != argc)
3757  elog(ERROR, "spi_exec_prepared: expected %d argument(s), %d passed",
3758  qdesc->nargs, argc);
3759 
3760  /************************************************************
3761  * Parse eventual attributes
3762  ************************************************************/
3763  limit = 0;
3764  if (attr != NULL)
3765  {
3766  sv = hv_fetch_string(attr, "limit");
3767  if (sv && *sv && SvIOK(*sv))
3768  limit = SvIV(*sv);
3769  }
3770  /************************************************************
3771  * Set up arguments
3772  ************************************************************/
3773  if (argc > 0)
3774  {
3775  nulls = (char *) palloc(argc);
3776  argvalues = (Datum *) palloc(argc * sizeof(Datum));
3777  }
3778  else
3779  {
3780  nulls = NULL;
3781  argvalues = NULL;
3782  }
3783 
3784  for (i = 0; i < argc; i++)
3785  {
3786  bool isnull;
3787 
3788  argvalues[i] = plperl_sv_to_datum(argv[i],
3789  qdesc->argtypes[i],
3790  -1,
3791  NULL,
3792  &qdesc->arginfuncs[i],
3793  qdesc->argtypioparams[i],
3794  &isnull);
3795  nulls[i] = isnull ? 'n' : ' ';
3796  }
3797 
3798  /************************************************************
3799  * go
3800  ************************************************************/
3801  spi_rv = SPI_execute_plan(qdesc->plan, argvalues, nulls,
3804  spi_rv);
3805  if (argc > 0)
3806  {
3807  pfree(argvalues);
3808  pfree(nulls);
3809  }
3810 
3811  /* Commit the inner transaction, return to outer xact context */
3813  MemoryContextSwitchTo(oldcontext);
3814  CurrentResourceOwner = oldowner;
3815  }
3816  PG_CATCH();
3817  {
3818  ErrorData *edata;
3819 
3820  /* Save error info */
3821  MemoryContextSwitchTo(oldcontext);
3822  edata = CopyErrorData();
3823  FlushErrorState();
3824 
3825  /* Abort the inner transaction */
3827  MemoryContextSwitchTo(oldcontext);
3828  CurrentResourceOwner = oldowner;
3829 
3830  /* Punt the error to Perl */
3831  croak_cstr(edata->message);
3832 
3833  /* Can't get here, but keep compiler quiet */
3834  return NULL;
3835  }
3836  PG_END_TRY();
3837 
3838  return ret_hv;
3839 }
3840 
3841 SV *
3842 plperl_spi_query_prepared(char *query, int argc, SV **argv)
3843 {
3844  int i;
3845  char *nulls;
3846  Datum *argvalues;
3847  plperl_query_desc *qdesc;
3848  plperl_query_entry *hash_entry;
3849  SV *cursor;
3850  Portal portal = NULL;
3851 
3852  /*
3853  * Execute the query inside a sub-transaction, so we can cope with errors
3854  * sanely
3855  */
3856  MemoryContext oldcontext = CurrentMemoryContext;
3858 
3860 
3862  /* Want to run inside function's memory context */
3863  MemoryContextSwitchTo(oldcontext);
3864 
3865  PG_TRY();
3866  {
3867  /************************************************************
3868  * Fetch the saved plan descriptor, see if it's o.k.
3869  ************************************************************/
3870  hash_entry = hash_search(plperl_active_interp->query_hash, query,
3871  HASH_FIND, NULL);
3872  if (hash_entry == NULL)
3873  elog(ERROR, "spi_query_prepared: Invalid prepared query passed");
3874 
3875  qdesc = hash_entry->query_data;
3876  if (qdesc == NULL)
3877  elog(ERROR, "spi_query_prepared: plperl query_hash value vanished");
3878 
3879  if (qdesc->nargs != argc)
3880  elog(ERROR, "spi_query_prepared: expected %d argument(s), %d passed",
3881  qdesc->nargs, argc);
3882 
3883  /************************************************************
3884  * Set up arguments
3885  ************************************************************/
3886  if (argc > 0)
3887  {
3888  nulls = (char *) palloc(argc);
3889  argvalues = (Datum *) palloc(argc * sizeof(Datum));
3890  }
3891  else
3892  {
3893  nulls = NULL;
3894  argvalues = NULL;
3895  }
3896 
3897  for (i = 0; i < argc; i++)
3898  {
3899  bool isnull;
3900 
3901  argvalues[i] = plperl_sv_to_datum(argv[i],
3902  qdesc->argtypes[i],
3903  -1,
3904  NULL,
3905  &qdesc->arginfuncs[i],
3906  qdesc->argtypioparams[i],
3907  &isnull);
3908  nulls[i] = isnull ? 'n' : ' ';
3909  }
3910 
3911  /************************************************************
3912  * go
3913  ************************************************************/
3914  portal = SPI_cursor_open(NULL, qdesc->plan, argvalues, nulls,
3916  if (argc > 0)
3917  {
3918  pfree(argvalues);
3919  pfree(nulls);
3920  }
3921  if (portal == NULL)
3922  elog(ERROR, "SPI_cursor_open() failed:%s",
3924 
3925  cursor = cstr2sv(portal->name);
3926 
3927  PinPortal(portal);
3928 
3929  /* Commit the inner transaction, return to outer xact context */
3931  MemoryContextSwitchTo(oldcontext);
3932  CurrentResourceOwner = oldowner;
3933  }
3934  PG_CATCH();
3935  {
3936  ErrorData *edata;
3937 
3938  /* Save error info */
3939  MemoryContextSwitchTo(oldcontext);
3940  edata = CopyErrorData();
3941  FlushErrorState();
3942 
3943  /* Abort the inner transaction */
3945  MemoryContextSwitchTo(oldcontext);
3946  CurrentResourceOwner = oldowner;
3947 
3948  /* Punt the error to Perl */
3949  croak_cstr(edata->message);
3950 
3951  /* Can't get here, but keep compiler quiet */
3952  return NULL;
3953  }
3954  PG_END_TRY();
3955 
3956  return cursor;
3957 }
3958 
3959 void
3961 {
3962  SPIPlanPtr plan;
3963  plperl_query_desc *qdesc;
3964  plperl_query_entry *hash_entry;
3965 
3967 
3968  hash_entry = hash_search(plperl_active_interp->query_hash, query,
3969  HASH_FIND, NULL);
3970  if (hash_entry == NULL)
3971  elog(ERROR, "spi_freeplan: Invalid prepared query passed");
3972 
3973  qdesc = hash_entry->query_data;
3974  if (qdesc == NULL)
3975  elog(ERROR, "spi_freeplan: plperl query_hash value vanished");
3976  plan = qdesc->plan;
3977 
3978  /*
3979  * free all memory before SPI_freeplan, so if it dies, nothing will be
3980  * left over
3981  */
3983  HASH_REMOVE, NULL);
3984 
3985  MemoryContextDelete(qdesc->plan_cxt);
3986 
3987  SPI_freeplan(plan);
3988 }
3989 
3990 void
3992 {
3993  MemoryContext oldcontext = CurrentMemoryContext;
3994 
3996 
3997  PG_TRY();
3998  {
3999  SPI_commit();
4000  }
4001  PG_CATCH();
4002  {
4003  ErrorData *edata;
4004 
4005  /* Save error info */
4006  MemoryContextSwitchTo(oldcontext);
4007  edata = CopyErrorData();
4008  FlushErrorState();
4009 
4010  /* Punt the error to Perl */
4011  croak_cstr(edata->message);
4012  }
4013  PG_END_TRY();
4014 }
4015 
4016 void
4018 {
4019  MemoryContext oldcontext = CurrentMemoryContext;
4020 
4022 
4023  PG_TRY();
4024  {
4025  SPI_rollback();
4026  }
4027  PG_CATCH();
4028  {
4029  ErrorData *edata;
4030 
4031  /* Save error info */
4032  MemoryContextSwitchTo(oldcontext);
4033  edata = CopyErrorData();
4034  FlushErrorState();
4035 
4036  /* Punt the error to Perl */
4037  croak_cstr(edata->message);
4038  }
4039  PG_END_TRY();
4040 }
4041 
4042 /*
4043  * Implementation of plperl's elog() function
4044  *
4045  * If the error level is less than ERROR, we'll just emit the message and
4046  * return. When it is ERROR, elog() will longjmp, which we catch and
4047  * turn into a Perl croak(). Note we are assuming that elog() can't have
4048  * any internal failures that are so bad as to require a transaction abort.
4049  *
4050  * The main reason this is out-of-line is to avoid conflicts between XSUB.h
4051  * and the PG_TRY macros.
4052  */
4053 void
4054 plperl_util_elog(int level, SV *msg)
4055 {
4056  MemoryContext oldcontext = CurrentMemoryContext;
4057  char *volatile cmsg = NULL;
4058 
4059  /*
4060  * We intentionally omit check_spi_usage_allowed() here, as this seems
4061  * safe to allow even in the contexts that that function rejects.
4062  */
4063 
4064  PG_TRY();
4065  {
4066  cmsg = sv2cstr(msg);
4067  elog(level, "%s", cmsg);
4068  pfree(cmsg);
4069  }
4070  PG_CATCH();
4071  {
4072  ErrorData *edata;
4073 
4074  /* Must reset elog.c's state */
4075  MemoryContextSwitchTo(oldcontext);
4076  edata = CopyErrorData();
4077  FlushErrorState();
4078 
4079  if (cmsg)
4080  pfree(cmsg);
4081 
4082  /* Punt the error to Perl */
4083  croak_cstr(edata->message);
4084  }
4085  PG_END_TRY();
4086 }
4087 
4088 /*
4089  * Store an SV into a hash table under a key that is a string assumed to be
4090  * in the current database's encoding.
4091  */
4092 static SV **
4093 hv_store_string(HV *hv, const char *key, SV *val)
4094 {
4095  dTHX;
4096  int32 hlen;
4097  char *hkey;
4098  SV **ret;
4099 
4100  hkey = pg_server_to_any(key, strlen(key), PG_UTF8);
4101 
4102  /*
4103  * hv_store() recognizes a negative klen parameter as meaning a UTF-8
4104  * encoded key.
4105  */
4106  hlen = -(int) strlen(hkey);
4107  ret = hv_store(hv, hkey, hlen, val, 0);
4108 
4109  if (hkey != key)
4110  pfree(hkey);
4111 
4112  return ret;
4113 }
4114 
4115 /*
4116  * Fetch an SV from a hash table under a key that is a string assumed to be
4117  * in the current database's encoding.
4118  */
4119 static SV **
4120 hv_fetch_string(HV *hv, const char *key)
4121 {
4122  dTHX;
4123  int32 hlen;
4124  char *hkey;
4125  SV **ret;
4126 
4127  hkey = pg_server_to_any(key, strlen(key), PG_UTF8);
4128 
4129  /* See notes in hv_store_string */
4130  hlen = -(int) strlen(hkey);
4131  ret = hv_fetch(hv, hkey, hlen, 0);
4132 
4133  if (hkey != key)
4134  pfree(hkey);
4135 
4136  return ret;
4137 }
4138 
4139 /*
4140  * Provide function name for PL/Perl execution errors
4141  */
4142 static void
4144 {
4145  char *procname = (char *) arg;
4146 
4147  if (procname)
4148  errcontext("PL/Perl function \"%s\"", procname);
4149 }
4150 
4151 /*
4152  * Provide function name for PL/Perl compilation errors
4153  */
4154 static void
4156 {
4157  char *procname = (char *) arg;
4158 
4159  if (procname)
4160  errcontext("compilation of PL/Perl function \"%s\"", procname);
4161 }
4162 
4163 /*
4164  * Provide error context for the inline handler
4165  */
4166 static void
4168 {
4169  errcontext("PL/Perl anonymous code block");
4170 }
4171 
4172 
4173 /*
4174  * Perl's own setlocale(), copied from POSIX.xs
4175  * (needed because of the calls to new_*())
4176  *
4177  * Starting in 5.28, perl exposes Perl_setlocale to do so.
4178  */
4179 #if defined(WIN32) && PERL_VERSION_LT(5, 28, 0)
4180 static char *
4181 setlocale_perl(int category, char *locale)
4182 {
4183  dTHX;
4184  char *RETVAL = setlocale(category, locale);
4185 
4186  if (RETVAL)
4187  {
4188 #ifdef USE_LOCALE_CTYPE
4189  if (category == LC_CTYPE
4190 #ifdef LC_ALL
4191  || category == LC_ALL
4192 #endif
4193  )
4194  {
4195  char *newctype;
4196 
4197 #ifdef LC_ALL
4198  if (category == LC_ALL)
4199  newctype = setlocale(LC_CTYPE, NULL);
4200  else
4201 #endif
4202  newctype = RETVAL;
4203  new_ctype(newctype);
4204  }
4205 #endif /* USE_LOCALE_CTYPE */
4206 #ifdef USE_LOCALE_COLLATE
4207  if (category == LC_COLLATE
4208 #ifdef LC_ALL
4209  || category == LC_ALL
4210 #endif
4211  )
4212  {
4213  char *newcoll;
4214 
4215 #ifdef LC_ALL
4216  if (category == LC_ALL)
4217  newcoll = setlocale(LC_COLLATE, NULL);
4218  else
4219 #endif
4220  newcoll = RETVAL;
4221  new_collate(newcoll);
4222  }
4223 #endif /* USE_LOCALE_COLLATE */
4224 
4225 #ifdef USE_LOCALE_NUMERIC
4226  if (category == LC_NUMERIC
4227 #ifdef LC_ALL
4228  || category == LC_ALL
4229 #endif
4230  )
4231  {
4232  char *newnum;
4233 
4234 #ifdef LC_ALL
4235  if (category == LC_ALL)
4236  newnum = setlocale(LC_NUMERIC, NULL);
4237  else
4238 #endif
4239  newnum = RETVAL;
4240  new_numeric(newnum);
4241  }
4242 #endif /* USE_LOCALE_NUMERIC */
4243  }
4244 
4245  return RETVAL;
4246 }
4247 #endif /* defined(WIN32) && PERL_VERSION_LT(5, 28, 0) */
#define ARR_NDIM(a)
Definition: array.h:290
#define MAXDIM
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#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)
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ArrayType * construct_empty_array(Oid elmtype)
Definition: arrayfuncs.c:3561
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const char * GetCommandTagName(CommandTag commandTag)
Definition: cmdtag.c:47
void domain_check(Datum value, bool isnull, Oid domainType, void **extra, MemoryContext mcxt)
Definition: domains.c:346
void * hash_search(HTAB *hashp, const void *keyPtr, HASHACTION action, bool *foundPtr)
Definition: dynahash.c:955
HTAB * hash_create(const char *tabname, long nelem, const HASHCTL *info, int flags)
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void * hash_seq_search(HASH_SEQ_STATUS *status)
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Definition: dynahash.c:1385
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void FlushErrorState(void)
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Definition: elog.c:859
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Definition: elog.c:1072
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Definition: elog.c:1731
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Definition: elog.h:411
#define errcontext
Definition: elog.h:196
#define DEBUG3
Definition: elog.h:28
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Definition: elog.h:370
#define WARNING
Definition: elog.h:36
#define PG_END_TRY(...)
Definition: elog.h:395
#define ERROR
Definition: elog.h:39
#define PG_CATCH(...)
Definition: elog.h:380
#define elog(elevel,...)
Definition: elog.h:224
#define PG_FINALLY(...)
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Definition: elog.h:149
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@ 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:2145
Datum InputFunctionCall(FmgrInfo *flinfo, char *str, Oid typioparam, int32 typmod)
Definition: fmgr.c:1530
void fmgr_info(Oid functionId, FmgrInfo *finfo)
Definition: fmgr.c:127
void fmgr_info_cxt(Oid functionId, FmgrInfo *finfo, MemoryContext mcxt)
Definition: fmgr.c:137
char * OidOutputFunctionCall(Oid functionId, Datum val)
Definition: fmgr.c:1763
char * OutputFunctionCall(FmgrInfo *flinfo, Datum val)
Definition: fmgr.c:1683
#define PG_RETURN_VOID()
Definition: fmgr.h:349
#define OidFunctionCall1(functionId, arg1)
Definition: fmgr.h:680
#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:642
#define LOCAL_FCINFO(name, nargs)
Definition: fmgr.h:110
#define FunctionCall1(flinfo, arg1)
Definition: fmgr.h:660
#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:1379
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
static Datum HeapTupleGetDatum(const HeapTupleData *tuple)
Definition: funcapi.h:230
int work_mem
Definition: globals.c:128
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:5161
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:5075
void MarkGUCPrefixReserved(const char *className)
Definition: guc.c:5222
@ PGC_SUSET
Definition: guc.h:74
@ PGC_USERSET
Definition: guc.h:75
@ PGC_SIGHUP
Definition: guc.h:71
bool check_function_bodies
Definition: guc_tables.c:514
const char * str
HeapTuple heap_modify_tuple(HeapTuple tuple, TupleDesc tupleDesc, const Datum *replValues, const bool *replIsnull, const bool *doReplace)
Definition: heaptuple.c:1209
HeapTuple heap_form_tuple(TupleDesc tupleDescriptor, const Datum *values, const bool *isnull)
Definition: heaptuple.c:1116
#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:792
#define HeapTupleHeaderGetTypMod(tup)
Definition: htup_details.h:466
#define HeapTupleHeaderGetTypeId(tup)
Definition: htup_details.h:456
#define HeapTupleHeaderGetDatumLength(tup)
Definition: htup_details.h:450
#define HeapTupleHeaderGetRawXmin(tup)
Definition: htup_details.h:304
#define GETSTRUCT(TUP)
Definition: htup_details.h:653
#define nitems(x)
Definition: indent.h:31
long val
Definition: informix.c:670
static char * locale
Definition: initdb.c:140
void on_proc_exit(pg_on_exit_callback function, Datum arg)
Definition: ipc.c:309
int x
Definition: isn.c:71
int i
Definition: isn.c:73
if(TABLE==NULL||TABLE_index==NULL)
Definition: isn.c:77
bool ItemPointerEquals(ItemPointer pointer1, ItemPointer pointer2)
Definition: itemptr.c:35
Oid get_element_type(Oid typid)
Definition: lsyscache.c:2759
bool type_is_rowtype(Oid typid)
Definition: lsyscache.c:2655
void getTypeOutputInfo(Oid type, Oid *typOutput, bool *typIsVarlena)
Definition: lsyscache.c:2907
Oid get_func_signature(Oid funcid, Oid **argtypes, int *nargs)
Definition: lsyscache.c:1696
void getTypeInputInfo(Oid type, Oid *typInput, Oid *typIOParam)
Definition: lsyscache.c:2874
Oid get_transform_tosql(Oid typid, Oid langid, List *trftypes)
Definition: lsyscache.c:2142
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:2325
char get_typtype(Oid typid)
Definition: lsyscache.c:2629
Oid get_base_element_type(Oid typid)
Definition: lsyscache.c:2832
Oid getTypeIOParam(HeapTuple typeTuple)
Definition: lsyscache.c:2303
Oid get_transform_fromsql(Oid typid, Oid langid, List *trftypes)
Definition: lsyscache.c:2120
@ IOFunc_output
Definition: lsyscache.h:36
bool pg_verifymbstr(const char *mbstr, int len, bool noError)
Definition: mbutils.c:1556
char * pg_server_to_any(const char *s, int len, int encoding)
Definition: mbutils.c:749
void MemoryContextReset(MemoryContext context)
Definition: mcxt.c:383
char * pstrdup(const char *in)
Definition: mcxt.c:1695
void pfree(void *pointer)
Definition: mcxt.c:1520
MemoryContext TopMemoryContext
Definition: mcxt.c:149
void * palloc0(Size size)
Definition: mcxt.c:1346
MemoryContext CurrentMemoryContext
Definition: mcxt.c:143
void MemoryContextDelete(MemoryContext context)
Definition: mcxt.c:454
void * palloc(Size size)
Definition: mcxt.c:1316
void MemoryContextSetIdentifier(MemoryContext context, const char *id)
Definition: mcxt.c:612
#define AllocSetContextCreate
Definition: memutils.h:129
#define ALLOCSET_DEFAULT_SIZES
Definition: memutils.h:160
#define ALLOCSET_SMALL_SIZES
Definition: memutils.h:170
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:122
Oid GetUserId(void)
Definition: miscinit.c:514
void pg_bindtextdomain(const char *domain)
Definition: miscinit.c:1880
#define IsA(nodeptr, _type_)
Definition: nodes.h:158
#define castNode(_type_, nodeptr)
Definition: nodes.h:176
Datum oidout(PG_FUNCTION_ARGS)
Definition: oid.c:47
bool parseTypeString(const char *str, Oid *typeid_p, int32 *typmod_p, Node *escontext)
Definition: parse_type.c:785
NameData attname
Definition: pg_attribute.h:41
FormData_pg_attribute * Form_pg_attribute
Definition: pg_attribute.h:209
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:68
List * oid_array_to_list(Datum datum)
Definition: pg_proc.c:1184
FormData_pg_proc * Form_pg_proc
Definition: pg_proc.h:136
#define plan(x)
Definition: pg_regress.c:162
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:232
static HTAB * plperl_interp_hash
Definition: plperl.c:223
static SV * plperl_call_perl_func(plperl_proc_desc *desc, FunctionCallInfo fcinfo)
Definition: plperl.c:2180
struct plperl_call_data plperl_call_data
static char plperl_opmask[MAXO]
Definition: plperl.c:238
static void plperl_event_trigger_handler(PG_FUNCTION_ARGS)
Definition: plperl.c:2634
static bool plperl_use_strict
Definition: plperl.c:231
static void _sv_to_datum_finfo(Oid typid, FmgrInfo *finfo, Oid *typioparam)
Definition: plperl.c:1300
static Datum plperl_func_handler(PG_FUNCTION_ARGS)
Definition: plperl.c:2402
struct plperl_proc_key plperl_proc_key
SV * plperl_spi_query(char *query)
Definition: plperl.c:3404
static HTAB * plperl_proc_hash
Definition: plperl.c:224
static void set_interp_require(bool trusted)
Definition: plperl.c:490
static bool plperl_ending
Definition: plperl.c:236
static void SvREFCNT_dec_current(SV *sv)
Definition: plperl.c:312
void plperl_return_next(SV *sv)
Definition: plperl.c:3245
void _PG_init(void)
Definition: plperl.c:380
static SV * plperl_hash_from_tuple(HeapTuple tuple, TupleDesc tupdesc, bool include_generated)
Definition: plperl.c:3026
struct plperl_query_desc plperl_query_desc
SV * plperl_spi_query_prepared(char *query, int argc, SV **argv)
Definition: plperl.c:3842
static plperl_interp_desc * plperl_active_interp
Definition: plperl.c:225
Datum plperlu_call_handler(PG_FUNCTION_ARGS)
Definition: plperl.c:2067
static PerlInterpreter * plperl_held_interp
Definition: plperl.c:228
static HV * plperl_spi_execute_fetch_result(SPITupleTable *, uint64, int)
Definition: plperl.c:3193
static void plperl_trusted_init(void)
Definition: plperl.c:957
static SV * make_array_ref(plperl_array_info *info, int first, int last)
Definition: plperl.c:1593
HV * plperl_spi_exec(char *query, int limit)
Definition: plperl.c:3133
void plperl_spi_rollback(void)
Definition: plperl.c:4017
Datum plperl_inline_handler(PG_FUNCTION_ARGS)
Definition: plperl.c:1894
static HeapTuple plperl_build_tuple_result(HV *perlhash, TupleDesc td)
Definition: plperl.c:1075
struct plperl_proc_desc plperl_proc_desc
PG_MODULE_MAGIC
Definition: plperl.c:56
static void plperl_untrusted_init(void)
Definition: plperl.c:1038
SV * plperl_spi_fetchrow(char *cursor)
Definition: plperl.c:3476
static void plperl_create_sub(plperl_proc_desc *desc, const char *s, Oid fn_oid)
Definition: plperl.c:2095
Datum plperl_validator(PG_FUNCTION_ARGS)
Definition: plperl.c:1989
static void plperl_init_shared_libs(pTHX)
Definition: plperl.c:2168
#define increment_prodesc_refcount(prodesc)
Definition: plperl.c:127
static char * hek2cstr(HE *he)
Definition: plperl.c:323
static void plperl_destroy_interp(PerlInterpreter **)
Definition: plperl.c:918
EXTERN_C void boot_DynaLoader(pTHX_ CV *cv)
static char * strip_trailing_ws(const char *msg)
Definition: plperl.c:1061
static OP * pp_require_safe(pTHX)
Definition: plperl.c:880
HV * plperl_spi_exec_prepared(char *query, HV *attr, int argc, SV **argv)
Definition: plperl.c:3715
#define setlocale_perl(a, b)
Definition: plperl.c:302
struct plperl_array_info plperl_array_info
char * plperl_sv_to_literal(SV *sv, char *fqtypename)
Definition: plperl.c:1444
static void free_plperl_function(plperl_proc_desc *prodesc)
Definition: plperl.c:2700
EXTERN_C void boot_PostgreSQL__InServer__Util(pTHX_ CV *cv)
static SV * plperl_event_trigger_build_args(FunctionCallInfo fcinfo)
Definition: plperl.c:1744
static void check_spi_usage_allowed(void)
Definition: plperl.c:3106
static SV * plperl_trigger_build_args(FunctionCallInfo fcinfo)
Definition: plperl.c:1631
PG_FUNCTION_INFO_V1(plperl_call_handler)
SV * plperl_spi_prepare(char *query, int argc, SV **argv)
Definition: plperl.c:3567
static SV * plperl_hash_from_datum(Datum attr)
Definition: plperl.c:2998
static void select_perl_context(bool trusted)
Definition: plperl.c:553
static Datum plperl_sv_to_datum(SV *sv, Oid typid, int32 typmod, FunctionCallInfo fcinfo, FmgrInfo *finfo, Oid typioparam, bool *isnull)
Definition: plperl.c:1323
struct plperl_query_entry plperl_query_entry
static void plperl_fini(int code, Datum arg)
Definition: plperl.c:509
static void plperl_exec_callback(void *arg)
Definition: plperl.c:4143
#define TEXTDOMAIN
Definition: plperl.c:43
static void plperl_inline_callback(void *arg)
Definition: plperl.c:4167
static SV * get_perl_array_ref(SV *sv)
Definition: plperl.c:1138
static SV * plperl_call_perl_trigger_func(plperl_proc_desc *desc, FunctionCallInfo fcinfo, SV *td)
Definition: plperl.c:2273
static SV ** hv_fetch_string(HV *hv, const char *key)
Definition: plperl.c:4120
#define decrement_prodesc_refcount(prodesc)
Definition: plperl.c:129
Datum plperlu_inline_handler(PG_FUNCTION_ARGS)
Definition: plperl.c:2075
static void plperl_compile_callback(void *arg)
Definition: plperl.c:4155
Datum plperlu_validator(PG_FUNCTION_ARGS)
Definition: plperl.c:2083
void plperl_spi_freeplan(char *query)
Definition: plperl.c:3960
static SV * plperl_ref_from_pg_array(Datum arg, Oid typid)
Definition: plperl.c:1480
static Datum plperl_array_to_datum(SV *src, Oid typid, int32 typmod)
Definition: plperl.c:1257
static char * plperl_on_init
Definition: plperl.c:232
static char * plperl_on_plperl_init
Definition: plperl.c:233
static SV * split_array(plperl_array_info *info, int first, int last, int nest)
Definition: plperl.c:1559
static Datum plperl_trigger_handler(PG_FUNCTION_ARGS)
Definition: plperl.c:2521
Datum plperl_call_handler(PG_FUNCTION_ARGS)
Definition: plperl.c:1852
static SV ** hv_store_string(HV *hv, const char *key, SV *val)
Definition: plperl.c:4093
static plperl_call_data * current_call_data
Definition: plperl.c:241
void plperl_util_elog(int level, SV *msg)
Definition: plperl.c:4054
void plperl_spi_cursor_close(char *cursor)
Definition: plperl.c:3551
static plperl_proc_desc * compile_plperl_function(Oid fn_oid, bool is_trigger, bool is_event_trigger)
Definition: plperl.c:2718
static OP *(* pp_require_orig)(pTHX)
Definition: plperl.c:237
static HeapTuple plperl_modify_tuple(HV *hvTD, TriggerData *tdata, HeapTuple otup)
Definition: plperl.c:1762
static void plperl_return_next_internal(SV *sv)
Definition: plperl.c:3275
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:2671
static void plperl_call_perl_event_trigger_func(plperl_proc_desc *desc, FunctionCallInfo fcinfo, SV *td)
Definition: plperl.c:2341
static PerlInterpreter * plperl_init_interp(void)
Definition: plperl.c:705
static void array_to_datum_internal(AV *av, ArrayBuildState **astatep, int *ndims, int *dims, int cur_depth, Oid elemtypid, int32 typmod, FmgrInfo *finfo, Oid typioparam)
Definition: plperl.c:1170
EXTERN_C void boot_PostgreSQL__InServer__SPI(pTHX_ CV *cv)
static char * plperl_on_plperlu_init
Definition: plperl.c:234
static Datum plperl_hash_to_datum(SV *src, TupleDesc td)
Definition: plperl.c:1126
void plperl_spi_commit(void)
Definition: plperl.c:3991
static void activate_interpreter(plperl_interp_desc *interp_desc)
Definition: plperl.c:684
static SV * cstr2sv(const char *str)
Definition: plperl.h:147
static void croak_cstr(const char *str)
Definition: plperl.h:175
static char * sv2cstr(SV *sv)
Definition: plperl.h:89
#define GvCV_set(gv, cv)
#define AV_SIZE_MAX
#define HeUTF8(he)
int pg_strcasecmp(const char *s1, const char *s2)
Definition: pgstrcasecmp.c:36
#define sprintf
Definition: port.h:240
pqsigfunc pqsignal(int signo, pqsigfunc func)
#define snprintf
Definition: port.h:238
void PinPortal(Portal portal)
Definition: portalmem.c:371
void UnpinPortal(Portal portal)
Definition: portalmem.c:380
void FloatExceptionHandler(SIGNAL_ARGS)
Definition: postgres.c:3019
void check_stack_depth(void)
Definition: postgres.c:3531
static Datum PointerGetDatum(const void *X)
Definition: postgres.h:322
static char * DatumGetCString(Datum X)
Definition: postgres.h:335
uintptr_t Datum
Definition: postgres.h:64
static Datum ObjectIdGetDatum(Oid X)
Definition: postgres.h:252
static Pointer DatumGetPointer(Datum X)
Definition: postgres.h:312
static Datum CStringGetDatum(const char *X)
Definition: postgres.h:350
#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
MemoryContextSwitchTo(old_ctx)
Datum regtypein(PG_FUNCTION_ARGS)
Definition: regproc.c:1176
ResourceOwner CurrentResourceOwner
Definition: resowner.c:165
struct @10::@11 av[32]
void SPI_commit(void)
Definition: spi.c:320
char * SPI_getrelname(Relation rel)
Definition: spi.c:1323
int SPI_fnumber(TupleDesc tupdesc, const char *fname)
Definition: spi.c:1172
uint64 SPI_processed
Definition: spi.c:44
int SPI_freeplan(SPIPlanPtr plan)
Definition: spi.c:1022
SPITupleTable * SPI_tuptable
Definition: spi.c:45
Portal SPI_cursor_find(const char *name)
Definition: spi.c:1791
int SPI_connect(void)
Definition: spi.c:94
int SPI_result
Definition: spi.c:46
const char * SPI_result_code_string(int code)
Definition: spi.c:1969
void SPI_cursor_fetch(Portal portal, bool forward, long count)
Definition: spi.c:1803
int SPI_finish(void)
Definition: spi.c:182
int SPI_execute_plan(SPIPlanPtr plan, Datum *Values, const char *Nulls, bool read_only, long tcount)
Definition: spi.c:669
int SPI_register_trigger_data(TriggerData *tdata)
Definition: spi.c:3344
void SPI_freetuptable(SPITupleTable *tuptable)
Definition: spi.c:1383
Portal SPI_cursor_open(const char *name, SPIPlanPtr plan, Datum *Values, const char *Nulls, bool read_only)
Definition: spi.c:1442
SPIPlanPtr SPI_prepare(const char *src, int nargs, Oid *argtypes)
Definition: spi.c:857
int SPI_keepplan(SPIPlanPtr plan)
Definition: spi.c:973
void SPI_cursor_close(Portal portal)
Definition: spi.c:1859
char * SPI_getnspname(Relation rel)
Definition: spi.c:1329
int SPI_connect_ext(int options)
Definition: spi.c:100
void SPI_rollback(void)
Definition: spi.c:413
int SPI_execute(const char *src, bool read_only, long tcount)
Definition: spi.c:593
#define SPI_OPT_NONATOMIC
Definition: spi.h:102
#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:295
void(* callback)(void *arg)
Definition: elog.h:296
char * message
Definition: elog.h:439
CommandTag tag
Definition: event_trigger.h:29
const char * event
Definition: event_trigger.h:27
MemoryContext ecxt_per_query_memory
Definition: execnodes.h:262
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:3495
Definition: pg_list.h:54
Datum value
Definition: postgres.h:75
bool isnull
Definition: postgres.h:77
const char * name
Definition: portal.h:118
TupleDesc rd_att
Definition: rel.h:112
Oid rd_id
Definition: rel.h:113
SetFunctionReturnMode returnMode
Definition: execnodes.h:336
ExprContext * econtext
Definition: execnodes.h:332
TupleDesc setDesc
Definition: execnodes.h:340
Tuplestorestate * setResult
Definition: execnodes.h:339
TupleDesc expectedDesc
Definition: execnodes.h:333
int allowedModes
Definition: execnodes.h:334
ExprDoneCond isDone
Definition: execnodes.h:337
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:137
bool elem_is_rowtype
Definition: plperl.c:211
bool * nulls
Definition: plperl.c:213
FmgrInfo transform_proc
Definition: plperl.c:216
FmgrInfo proc
Definition: plperl.c:215
Datum * elements
Definition: plperl.c:212
FunctionCallInfo fcinfo
Definition: plperl.c:174
void * cdomain_info
Definition: plperl.c:179
plperl_proc_desc * prodesc
Definition: plperl.c:173
TupleDesc ret_tdesc
Definition: plperl.c:177
MemoryContext tmp_cxt
Definition: plperl.c:180
Tuplestorestate * tuple_store
Definition: plperl.c:176
PerlInterpreter * interp
Definition: plperl.c:86
HTAB * query_hash
Definition: plperl.c:87
char * proname
Definition: plperl.c:102
FmgrInfo result_in_func
Definition: plperl.c:118
bool fn_readonly
Definition: plperl.c:109
unsigned long fn_refcount
Definition: plperl.c:104
MemoryContext fn_cxt
Definition: plperl.c:103
bool fn_retisarray
Definition: plperl.c:115
FmgrInfo * arg_out_func
Definition: plperl.c:122
Oid * arg_arraytype
Definition: plperl.c:124
ItemPointerData fn_tid
Definition: plperl.c:106
plperl_interp_desc * interp
Definition: plperl.c:108
bool fn_retistuple
Definition: plperl.c:113
SV * reference
Definition: plperl.c:107
TransactionId fn_xmin
Definition: plperl.c:105
bool * arg_is_rowtype
Definition: plperl.c:123
Oid result_typioparam
Definition: plperl.c:119
bool fn_retisset
Definition: plperl.c:114
List * trftypes
Definition: plperl.c:111
bool lanpltrusted
Definition: plperl.c:112
Oid is_trigger
Definition: plperl.c:157
plperl_proc_key proc_key
Definition: plperl.c:163
plperl_proc_desc * proc_ptr
Definition: plperl.c:164
char qname[24]
Definition: plperl.c:188
MemoryContext plan_cxt
Definition: plperl.c:189
FmgrInfo * arginfuncs
Definition: plperl.c:193
Oid * argtypes
Definition: plperl.c:192
SPIPlanPtr plan
Definition: plperl.c:190
Oid * argtypioparams
Definition: plperl.c:194
Definition: plperl.c:200
char query_name[NAMEDATALEN]
Definition: plperl.c:201
plperl_query_desc * query_data
Definition: plperl.c:202
Definition: type.h:88
void ReleaseSysCache(HeapTuple tuple)
Definition: syscache.c:266
HeapTuple SearchSysCache1(int cacheId, Datum key1)
Definition: syscache.c:218
Datum SysCacheGetAttr(int cacheId, HeapTuple tup, AttrNumber attributeNumber, bool *isNull)
Definition: syscache.c:479
Datum SysCacheGetAttrNotNull(int cacheId, HeapTuple tup, AttrNumber attributeNumber)
Definition: syscache.c:510
#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:133
#define ReleaseTupleDesc(tupdesc)
Definition: tupdesc.h:122
#define TupleDescAttr(tupdesc, i)
Definition: tupdesc.h:92
Tuplestorestate * tuplestore_begin_heap(bool randomAccess, bool interXact, int maxKBytes)
Definition: tuplestore.c:318
void tuplestore_putvalues(Tuplestorestate *state, TupleDesc tdesc, const Datum *values, const bool *isnull)
Definition: tuplestore.c:750
void tuplestore_puttuple(Tuplestorestate *state, HeapTuple tuple)
Definition: tuplestore.c:730
TupleDesc lookup_rowtype_tupdesc(Oid type_id, int32 typmod)
Definition: typcache.c:1833
TupleDesc lookup_rowtype_tupdesc_domain(Oid type_id, int32 typmod, bool noError)
Definition: typcache.c:1889
const char * name
#define setlocale(a, b)
Definition: win32_port.h:467
void BeginInternalSubTransaction(const char *name)
Definition: xact.c:4656
void RollbackAndReleaseCurrentSubTransaction(void)
Definition: xact.c:4758
void ReleaseCurrentSubTransaction(void)
Definition: xact.c:4730