mirror of
https://github.com/postgres/postgres.git
synced 2025-04-27 22:56:53 +03:00
85d67ccd75
Database access is disallowed during both these operations, although it might be allowed in END blocks in future. Patch from Tim Bunce.
2980 lines
75 KiB
C
2980 lines
75 KiB
C
/**********************************************************************
|
|
* plperl.c - perl as a procedural language for PostgreSQL
|
|
*
|
|
* $PostgreSQL: pgsql/src/pl/plperl/plperl.c,v 1.163 2010/01/30 01:46:57 adunstan Exp $
|
|
*
|
|
**********************************************************************/
|
|
|
|
#include "postgres.h"
|
|
/* Defined by Perl */
|
|
#undef _
|
|
|
|
/* system stuff */
|
|
#include <ctype.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <locale.h>
|
|
|
|
/* postgreSQL stuff */
|
|
#include "access/xact.h"
|
|
#include "catalog/pg_language.h"
|
|
#include "catalog/pg_proc.h"
|
|
#include "catalog/pg_type.h"
|
|
#include "commands/trigger.h"
|
|
#include "executor/spi.h"
|
|
#include "funcapi.h"
|
|
#include "mb/pg_wchar.h"
|
|
#include "miscadmin.h"
|
|
#include "nodes/makefuncs.h"
|
|
#include "parser/parse_type.h"
|
|
#include "storage/ipc.h"
|
|
#include "utils/builtins.h"
|
|
#include "utils/fmgroids.h"
|
|
#include "utils/guc.h"
|
|
#include "utils/hsearch.h"
|
|
#include "utils/lsyscache.h"
|
|
#include "utils/memutils.h"
|
|
#include "utils/syscache.h"
|
|
#include "utils/typcache.h"
|
|
|
|
/* define our text domain for translations */
|
|
#undef TEXTDOMAIN
|
|
#define TEXTDOMAIN PG_TEXTDOMAIN("plperl")
|
|
|
|
/* perl stuff */
|
|
#include "plperl.h"
|
|
|
|
/* string literal macros defining chunks of perl code */
|
|
#include "perlchunks.h"
|
|
|
|
PG_MODULE_MAGIC;
|
|
|
|
/**********************************************************************
|
|
* The information we cache about loaded procedures
|
|
**********************************************************************/
|
|
typedef struct plperl_proc_desc
|
|
{
|
|
char *proname; /* user name of procedure */
|
|
TransactionId fn_xmin;
|
|
ItemPointerData fn_tid;
|
|
bool fn_readonly;
|
|
bool lanpltrusted;
|
|
bool fn_retistuple; /* true, if function returns tuple */
|
|
bool fn_retisset; /* true, if function returns set */
|
|
bool fn_retisarray; /* true if function returns array */
|
|
Oid result_oid; /* Oid of result type */
|
|
FmgrInfo result_in_func; /* I/O function and arg for result type */
|
|
Oid result_typioparam;
|
|
int nargs;
|
|
FmgrInfo arg_out_func[FUNC_MAX_ARGS];
|
|
bool arg_is_rowtype[FUNC_MAX_ARGS];
|
|
SV *reference;
|
|
} plperl_proc_desc;
|
|
|
|
/* hash table entry for proc desc */
|
|
|
|
typedef struct plperl_proc_entry
|
|
{
|
|
char proc_name[NAMEDATALEN]; /* internal name, eg
|
|
* __PLPerl_proc_39987 */
|
|
plperl_proc_desc *proc_data;
|
|
} plperl_proc_entry;
|
|
|
|
/*
|
|
* The information we cache for the duration of a single call to a
|
|
* function.
|
|
*/
|
|
typedef struct plperl_call_data
|
|
{
|
|
plperl_proc_desc *prodesc;
|
|
FunctionCallInfo fcinfo;
|
|
Tuplestorestate *tuple_store;
|
|
TupleDesc ret_tdesc;
|
|
AttInMetadata *attinmeta;
|
|
MemoryContext tmp_cxt;
|
|
} plperl_call_data;
|
|
|
|
/**********************************************************************
|
|
* The information we cache about prepared and saved plans
|
|
**********************************************************************/
|
|
typedef struct plperl_query_desc
|
|
{
|
|
char qname[20];
|
|
void *plan;
|
|
int nargs;
|
|
Oid *argtypes;
|
|
FmgrInfo *arginfuncs;
|
|
Oid *argtypioparams;
|
|
} plperl_query_desc;
|
|
|
|
/* hash table entry for query desc */
|
|
|
|
typedef struct plperl_query_entry
|
|
{
|
|
char query_name[NAMEDATALEN];
|
|
plperl_query_desc *query_data;
|
|
} plperl_query_entry;
|
|
|
|
/**********************************************************************
|
|
* Global data
|
|
**********************************************************************/
|
|
|
|
typedef enum
|
|
{
|
|
INTERP_NONE,
|
|
INTERP_HELD,
|
|
INTERP_TRUSTED,
|
|
INTERP_UNTRUSTED,
|
|
INTERP_BOTH
|
|
} InterpState;
|
|
|
|
static InterpState interp_state = INTERP_NONE;
|
|
|
|
static PerlInterpreter *plperl_trusted_interp = NULL;
|
|
static PerlInterpreter *plperl_untrusted_interp = NULL;
|
|
static PerlInterpreter *plperl_held_interp = NULL;
|
|
static OP *(*pp_require_orig)(pTHX) = NULL;
|
|
static bool trusted_context;
|
|
static HTAB *plperl_proc_hash = NULL;
|
|
static HTAB *plperl_query_hash = NULL;
|
|
|
|
static bool plperl_use_strict = false;
|
|
static char *plperl_on_perl_init = NULL;
|
|
static bool plperl_ending = false;
|
|
|
|
/* this is saved and restored by plperl_call_handler */
|
|
static plperl_call_data *current_call_data = NULL;
|
|
|
|
/**********************************************************************
|
|
* Forward declarations
|
|
**********************************************************************/
|
|
Datum plperl_call_handler(PG_FUNCTION_ARGS);
|
|
Datum plperl_inline_handler(PG_FUNCTION_ARGS);
|
|
Datum plperl_validator(PG_FUNCTION_ARGS);
|
|
void _PG_init(void);
|
|
|
|
static PerlInterpreter *plperl_init_interp(void);
|
|
static void plperl_destroy_interp(PerlInterpreter **);
|
|
static void plperl_fini(int code, Datum arg);
|
|
|
|
static Datum plperl_func_handler(PG_FUNCTION_ARGS);
|
|
static Datum plperl_trigger_handler(PG_FUNCTION_ARGS);
|
|
|
|
static plperl_proc_desc *compile_plperl_function(Oid fn_oid, bool is_trigger);
|
|
|
|
static SV *plperl_hash_from_tuple(HeapTuple tuple, TupleDesc tupdesc);
|
|
static void plperl_init_shared_libs(pTHX);
|
|
static void plperl_safe_init(void);
|
|
static HV *plperl_spi_execute_fetch_result(SPITupleTable *, int, int);
|
|
static SV *newSVstring(const char *str);
|
|
static SV **hv_store_string(HV *hv, const char *key, SV *val);
|
|
static SV **hv_fetch_string(HV *hv, const char *key);
|
|
static void plperl_create_sub(plperl_proc_desc *desc, char *s, Oid fn_oid);
|
|
static SV *plperl_call_perl_func(plperl_proc_desc *desc, FunctionCallInfo fcinfo);
|
|
static void plperl_compile_callback(void *arg);
|
|
static void plperl_exec_callback(void *arg);
|
|
static void plperl_inline_callback(void *arg);
|
|
static char *strip_trailing_ws(const char *msg);
|
|
static OP * pp_require_safe(pTHX);
|
|
static int restore_context(bool);
|
|
|
|
/*
|
|
* Convert an SV to char * and verify the encoding via pg_verifymbstr()
|
|
*/
|
|
static inline char *
|
|
sv2text_mbverified(SV *sv)
|
|
{
|
|
char * val;
|
|
STRLEN len;
|
|
|
|
/* The value returned here might include an
|
|
* embedded nul byte, because perl allows such things.
|
|
* That's OK, because pg_verifymbstr will choke on it, If
|
|
* we just used strlen() instead of getting perl's idea of
|
|
* the length, whatever uses the "verified" value might
|
|
* get something quite weird.
|
|
*/
|
|
val = SvPV(sv, len);
|
|
pg_verifymbstr(val, len, false);
|
|
return val;
|
|
}
|
|
|
|
/*
|
|
* This routine is a crock, and so is everyplace that calls it. The problem
|
|
* is that the cached form of plperl functions/queries is allocated permanently
|
|
* (mostly via malloc()) and never released until backend exit. Subsidiary
|
|
* data structures such as fmgr info records therefore must live forever
|
|
* as well. A better implementation would store all this stuff in a per-
|
|
* function memory context that could be reclaimed at need. In the meantime,
|
|
* fmgr_info_cxt must be called specifying TopMemoryContext so that whatever
|
|
* it might allocate, and whatever the eventual function might allocate using
|
|
* fn_mcxt, will live forever too.
|
|
*/
|
|
static void
|
|
perm_fmgr_info(Oid functionId, FmgrInfo *finfo)
|
|
{
|
|
fmgr_info_cxt(functionId, finfo, TopMemoryContext);
|
|
}
|
|
|
|
|
|
/*
|
|
* _PG_init() - library load-time initialization
|
|
*
|
|
* DO NOT make this static nor change its name!
|
|
*/
|
|
void
|
|
_PG_init(void)
|
|
{
|
|
/* Be sure we do initialization only once (should be redundant now) */
|
|
static bool inited = false;
|
|
HASHCTL hash_ctl;
|
|
|
|
if (inited)
|
|
return;
|
|
|
|
pg_bindtextdomain(TEXTDOMAIN);
|
|
|
|
DefineCustomBoolVariable("plperl.use_strict",
|
|
gettext_noop("If true, trusted and untrusted Perl code will be compiled in strict mode."),
|
|
NULL,
|
|
&plperl_use_strict,
|
|
false,
|
|
PGC_USERSET, 0,
|
|
NULL, NULL);
|
|
|
|
DefineCustomStringVariable("plperl.on_perl_init",
|
|
gettext_noop("Perl code to execute when the perl interpreter is initialized."),
|
|
NULL,
|
|
&plperl_on_perl_init,
|
|
NULL,
|
|
PGC_SIGHUP, 0,
|
|
NULL, NULL);
|
|
|
|
EmitWarningsOnPlaceholders("plperl");
|
|
|
|
MemSet(&hash_ctl, 0, sizeof(hash_ctl));
|
|
|
|
hash_ctl.keysize = NAMEDATALEN;
|
|
hash_ctl.entrysize = sizeof(plperl_proc_entry);
|
|
|
|
plperl_proc_hash = hash_create("PLPerl Procedures",
|
|
32,
|
|
&hash_ctl,
|
|
HASH_ELEM);
|
|
|
|
hash_ctl.entrysize = sizeof(plperl_query_entry);
|
|
plperl_query_hash = hash_create("PLPerl Queries",
|
|
32,
|
|
&hash_ctl,
|
|
HASH_ELEM);
|
|
|
|
plperl_held_interp = plperl_init_interp();
|
|
interp_state = INTERP_HELD;
|
|
|
|
inited = true;
|
|
}
|
|
|
|
|
|
/*
|
|
* Cleanup perl interpreters, including running END blocks.
|
|
* Does not fully undo the actions of _PG_init() nor make it callable again.
|
|
*/
|
|
static void
|
|
plperl_fini(int code, Datum arg)
|
|
{
|
|
elog(DEBUG3, "plperl_fini");
|
|
|
|
/*
|
|
* Disable use of spi_* functions when running END/DESTROY code.
|
|
* Could be enabled in future, with care, using a transaction
|
|
* http://archives.postgresql.org/pgsql-hackers/2010-01/msg02743.php
|
|
*/
|
|
plperl_ending = true;
|
|
|
|
/* Only perform perl cleanup if we're exiting cleanly */
|
|
if (code) {
|
|
elog(DEBUG3, "plperl_fini: skipped");
|
|
return;
|
|
}
|
|
|
|
plperl_destroy_interp(&plperl_trusted_interp);
|
|
plperl_destroy_interp(&plperl_untrusted_interp);
|
|
plperl_destroy_interp(&plperl_held_interp);
|
|
|
|
elog(DEBUG3, "plperl_fini: done");
|
|
}
|
|
|
|
|
|
#define SAFE_MODULE \
|
|
"require Safe; $Safe::VERSION"
|
|
|
|
/********************************************************************
|
|
*
|
|
* We start out by creating a "held" interpreter that we can use in
|
|
* trusted or untrusted mode (but not both) as the need arises. Later, we
|
|
* assign that interpreter if it is available to either the trusted or
|
|
* untrusted interpreter. If it has already been assigned, and we need to
|
|
* create the other interpreter, we do that if we can, or error out.
|
|
*/
|
|
|
|
|
|
static void
|
|
select_perl_context(bool trusted)
|
|
{
|
|
EXTERN_C void boot_PostgreSQL__InServer__SPI(pTHX_ CV *cv);
|
|
|
|
/*
|
|
* handle simple cases
|
|
*/
|
|
if (restore_context(trusted))
|
|
return;
|
|
|
|
/*
|
|
* adopt held interp if free, else create new one if possible
|
|
*/
|
|
if (interp_state == INTERP_HELD)
|
|
{
|
|
/* first actual use of a perl interpreter */
|
|
|
|
on_proc_exit(plperl_fini, 0);
|
|
|
|
if (trusted)
|
|
{
|
|
plperl_trusted_interp = plperl_held_interp;
|
|
interp_state = INTERP_TRUSTED;
|
|
}
|
|
else
|
|
{
|
|
plperl_untrusted_interp = plperl_held_interp;
|
|
interp_state = INTERP_UNTRUSTED;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
#ifdef MULTIPLICITY
|
|
PerlInterpreter *plperl = plperl_init_interp();
|
|
if (trusted)
|
|
plperl_trusted_interp = plperl;
|
|
else
|
|
plperl_untrusted_interp = plperl;
|
|
interp_state = INTERP_BOTH;
|
|
#else
|
|
elog(ERROR,
|
|
"cannot allocate second Perl interpreter on this platform");
|
|
#endif
|
|
}
|
|
plperl_held_interp = NULL;
|
|
trusted_context = trusted;
|
|
|
|
/*
|
|
* initialization - done after plperl_*_interp and trusted_context
|
|
* updates above to ensure a clean state (and thereby avoid recursion via
|
|
* plperl_safe_init caling plperl_call_perl_func for utf8fix)
|
|
*/
|
|
if (trusted) {
|
|
plperl_safe_init();
|
|
PL_ppaddr[OP_REQUIRE] = pp_require_safe;
|
|
}
|
|
|
|
/*
|
|
* enable access to the database
|
|
*/
|
|
newXS("PostgreSQL::InServer::SPI::bootstrap",
|
|
boot_PostgreSQL__InServer__SPI, __FILE__);
|
|
|
|
eval_pv("PostgreSQL::InServer::SPI::bootstrap()", FALSE);
|
|
if (SvTRUE(ERRSV))
|
|
{
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INTERNAL_ERROR),
|
|
errmsg("%s", strip_trailing_ws(SvPV_nolen(ERRSV))),
|
|
errdetail("While executing PostgreSQL::InServer::SPI::bootstrap")));
|
|
}
|
|
|
|
}
|
|
|
|
/*
|
|
* Restore previous interpreter selection, if two are active
|
|
*/
|
|
static int
|
|
restore_context(bool trusted)
|
|
{
|
|
if (interp_state == INTERP_BOTH ||
|
|
( trusted && interp_state == INTERP_TRUSTED) ||
|
|
(!trusted && interp_state == INTERP_UNTRUSTED))
|
|
{
|
|
if (trusted_context != trusted)
|
|
{
|
|
if (trusted) {
|
|
PERL_SET_CONTEXT(plperl_trusted_interp);
|
|
PL_ppaddr[OP_REQUIRE] = pp_require_safe;
|
|
}
|
|
else {
|
|
PERL_SET_CONTEXT(plperl_untrusted_interp);
|
|
PL_ppaddr[OP_REQUIRE] = pp_require_orig;
|
|
}
|
|
trusted_context = trusted;
|
|
}
|
|
return 1; /* context restored */
|
|
}
|
|
|
|
return 0; /* unable - appropriate interpreter not available */
|
|
}
|
|
|
|
static PerlInterpreter *
|
|
plperl_init_interp(void)
|
|
{
|
|
PerlInterpreter *plperl;
|
|
static int perl_sys_init_done;
|
|
|
|
static char *embedding[3+2] = {
|
|
"", "-e", PLC_PERLBOOT
|
|
};
|
|
int nargs = 3;
|
|
|
|
#ifdef WIN32
|
|
|
|
/*
|
|
* The perl library on startup does horrible things like call
|
|
* setlocale(LC_ALL,""). We have protected against that on most platforms
|
|
* by setting the environment appropriately. However, on Windows,
|
|
* setlocale() does not consult the environment, so we need to save the
|
|
* existing locale settings before perl has a chance to mangle them and
|
|
* restore them after its dirty deeds are done.
|
|
*
|
|
* MSDN ref:
|
|
* http://msdn.microsoft.com/library/en-us/vclib/html/_crt_locale.asp
|
|
*
|
|
* It appears that we only need to do this on interpreter startup, and
|
|
* subsequent calls to the interpreter don't mess with the locale
|
|
* settings.
|
|
*
|
|
* We restore them using Perl's POSIX::setlocale() function so that Perl
|
|
* doesn't have a different idea of the locale from Postgres.
|
|
*
|
|
*/
|
|
|
|
char *loc;
|
|
char *save_collate,
|
|
*save_ctype,
|
|
*save_monetary,
|
|
*save_numeric,
|
|
*save_time;
|
|
char buf[1024];
|
|
|
|
loc = setlocale(LC_COLLATE, NULL);
|
|
save_collate = loc ? pstrdup(loc) : NULL;
|
|
loc = setlocale(LC_CTYPE, NULL);
|
|
save_ctype = loc ? pstrdup(loc) : NULL;
|
|
loc = setlocale(LC_MONETARY, NULL);
|
|
save_monetary = loc ? pstrdup(loc) : NULL;
|
|
loc = setlocale(LC_NUMERIC, NULL);
|
|
save_numeric = loc ? pstrdup(loc) : NULL;
|
|
loc = setlocale(LC_TIME, NULL);
|
|
save_time = loc ? pstrdup(loc) : NULL;
|
|
#endif
|
|
|
|
if (plperl_on_perl_init)
|
|
{
|
|
embedding[nargs++] = "-e";
|
|
embedding[nargs++] = plperl_on_perl_init;
|
|
}
|
|
|
|
/****
|
|
* The perl API docs state that PERL_SYS_INIT3 should be called before
|
|
* allocating interprters. Unfortunately, on some platforms this fails
|
|
* in the Perl_do_taint() routine, which is called when the platform is
|
|
* using the system's malloc() instead of perl's own. Other platforms,
|
|
* notably Windows, fail if PERL_SYS_INIT3 is not called. So we call it
|
|
* if it's available, unless perl is using the system malloc(), which is
|
|
* true when MYMALLOC is set.
|
|
*/
|
|
#if defined(PERL_SYS_INIT3) && !defined(MYMALLOC)
|
|
/* only call this the first time through, as per perlembed man page */
|
|
if (!perl_sys_init_done)
|
|
{
|
|
char *dummy_env[1] = {NULL};
|
|
|
|
PERL_SYS_INIT3(&nargs, (char ***) &embedding, (char ***) &dummy_env);
|
|
perl_sys_init_done = 1;
|
|
/* quiet warning if PERL_SYS_INIT3 doesn't use the third argument */
|
|
dummy_env[0] = NULL;
|
|
}
|
|
#endif
|
|
|
|
plperl = perl_alloc();
|
|
if (!plperl)
|
|
elog(ERROR, "could not allocate Perl interpreter");
|
|
|
|
PERL_SET_CONTEXT(plperl);
|
|
perl_construct(plperl);
|
|
|
|
/* run END blocks in perl_destruct instead of perl_run */
|
|
PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
|
|
|
|
/*
|
|
* Record the original function for the 'require' opcode.
|
|
* Ensure it's used for new interpreters.
|
|
*/
|
|
if (!pp_require_orig)
|
|
pp_require_orig = PL_ppaddr[OP_REQUIRE];
|
|
else
|
|
PL_ppaddr[OP_REQUIRE] = pp_require_orig;
|
|
|
|
if (perl_parse(plperl, plperl_init_shared_libs,
|
|
nargs, embedding, NULL) != 0)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INTERNAL_ERROR),
|
|
errmsg("while parsing perl initialization"),
|
|
errdetail("%s", strip_trailing_ws(SvPV_nolen(ERRSV))) ));
|
|
|
|
if (perl_run(plperl) != 0)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INTERNAL_ERROR),
|
|
errmsg("while running perl initialization"),
|
|
errdetail("%s", strip_trailing_ws(SvPV_nolen(ERRSV))) ));
|
|
|
|
#ifdef WIN32
|
|
|
|
eval_pv("use POSIX qw(locale_h);", TRUE); /* croak on failure */
|
|
|
|
if (save_collate != NULL)
|
|
{
|
|
snprintf(buf, sizeof(buf), "setlocale(%s,'%s');",
|
|
"LC_COLLATE", save_collate);
|
|
eval_pv(buf, TRUE);
|
|
pfree(save_collate);
|
|
}
|
|
if (save_ctype != NULL)
|
|
{
|
|
snprintf(buf, sizeof(buf), "setlocale(%s,'%s');",
|
|
"LC_CTYPE", save_ctype);
|
|
eval_pv(buf, TRUE);
|
|
pfree(save_ctype);
|
|
}
|
|
if (save_monetary != NULL)
|
|
{
|
|
snprintf(buf, sizeof(buf), "setlocale(%s,'%s');",
|
|
"LC_MONETARY", save_monetary);
|
|
eval_pv(buf, TRUE);
|
|
pfree(save_monetary);
|
|
}
|
|
if (save_numeric != NULL)
|
|
{
|
|
snprintf(buf, sizeof(buf), "setlocale(%s,'%s');",
|
|
"LC_NUMERIC", save_numeric);
|
|
eval_pv(buf, TRUE);
|
|
pfree(save_numeric);
|
|
}
|
|
if (save_time != NULL)
|
|
{
|
|
snprintf(buf, sizeof(buf), "setlocale(%s,'%s');",
|
|
"LC_TIME", save_time);
|
|
eval_pv(buf, TRUE);
|
|
pfree(save_time);
|
|
}
|
|
#endif
|
|
|
|
return plperl;
|
|
}
|
|
|
|
|
|
/*
|
|
* Our safe implementation of the require opcode.
|
|
* This is safe because it's completely unable to load any code.
|
|
* If the requested file/module has already been loaded it'll return true.
|
|
* If not, it'll die.
|
|
* So now "use Foo;" will work iff Foo has already been loaded.
|
|
*/
|
|
static OP *
|
|
pp_require_safe(pTHX)
|
|
{
|
|
dVAR; dSP;
|
|
SV *sv, **svp;
|
|
char *name;
|
|
STRLEN len;
|
|
|
|
sv = POPs;
|
|
name = SvPV(sv, len);
|
|
if (!(name && len > 0 && *name))
|
|
RETPUSHNO;
|
|
|
|
svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
|
|
if (svp && *svp != &PL_sv_undef)
|
|
RETPUSHYES;
|
|
|
|
DIE(aTHX_ "Unable to load %s into plperl", name);
|
|
}
|
|
|
|
|
|
static void
|
|
plperl_destroy_interp(PerlInterpreter **interp)
|
|
{
|
|
if (interp && *interp)
|
|
{
|
|
/*
|
|
* Only a very minimal destruction is performed:
|
|
* - just call END blocks.
|
|
*
|
|
* We could call perl_destruct() but we'd need to audit its
|
|
* actions very carefully and work-around any that impact us.
|
|
* (Calling sv_clean_objs() isn't an option because it's not
|
|
* part of perl's public API so isn't portably available.)
|
|
* Meanwhile END blocks can be used to perform manual cleanup.
|
|
*/
|
|
|
|
PERL_SET_CONTEXT(*interp);
|
|
|
|
/* Run END blocks - based on perl's perl_destruct() */
|
|
if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
|
|
dJMPENV;
|
|
int x = 0;
|
|
|
|
JMPENV_PUSH(x);
|
|
PERL_UNUSED_VAR(x);
|
|
if (PL_endav && !PL_minus_c)
|
|
call_list(PL_scopestack_ix, PL_endav);
|
|
JMPENV_POP;
|
|
}
|
|
LEAVE;
|
|
FREETMPS;
|
|
|
|
*interp = NULL;
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
plperl_safe_init(void)
|
|
{
|
|
SV *safe_version_sv;
|
|
IV safe_version_x100;
|
|
|
|
safe_version_sv = eval_pv(SAFE_MODULE, FALSE); /* TRUE = croak if failure */
|
|
safe_version_x100 = (int)(SvNV(safe_version_sv) * 100);
|
|
|
|
/*
|
|
* Reject too-old versions of Safe and some others:
|
|
* 2.20: http://rt.perl.org/rt3/Ticket/Display.html?id=72068
|
|
*/
|
|
if (safe_version_x100 < 209 || safe_version_x100 == 220)
|
|
{
|
|
/* not safe, so disallow all trusted funcs */
|
|
eval_pv(PLC_SAFE_BAD, FALSE);
|
|
if (SvTRUE(ERRSV))
|
|
{
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INTERNAL_ERROR),
|
|
errmsg("while executing PLC_SAFE_BAD"),
|
|
errdetail("%s", strip_trailing_ws(SvPV_nolen(ERRSV))) ));
|
|
}
|
|
|
|
}
|
|
else
|
|
{
|
|
eval_pv(PLC_SAFE_OK, FALSE);
|
|
if (SvTRUE(ERRSV))
|
|
{
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INTERNAL_ERROR),
|
|
errmsg("while executing PLC_SAFE_OK"),
|
|
errdetail("%s", strip_trailing_ws(SvPV_nolen(ERRSV))) ));
|
|
}
|
|
|
|
if (GetDatabaseEncoding() == PG_UTF8)
|
|
{
|
|
/*
|
|
* Fill in just enough information to set up this perl function in
|
|
* the safe container and call it. For some reason not entirely
|
|
* clear, it prevents errors that can arise from the regex code
|
|
* later trying to load utf8 modules.
|
|
* See http://rt.perl.org/rt3/Ticket/Display.html?id=47576
|
|
*/
|
|
plperl_proc_desc desc;
|
|
FunctionCallInfoData fcinfo;
|
|
SV *perlret;
|
|
|
|
desc.proname = "utf8fix";
|
|
desc.lanpltrusted = true;
|
|
desc.nargs = 1;
|
|
desc.arg_is_rowtype[0] = false;
|
|
fmgr_info(F_TEXTOUT, &(desc.arg_out_func[0]));
|
|
|
|
/* compile the function */
|
|
plperl_create_sub(&desc,
|
|
"return shift =~ /\\xa9/i ? 'true' : 'false' ;", 0);
|
|
|
|
/* set up to call the function with a single text argument 'a' */
|
|
fcinfo.arg[0] = CStringGetTextDatum("a");
|
|
fcinfo.argnull[0] = false;
|
|
|
|
/* and make the call */
|
|
perlret = plperl_call_perl_func(&desc, &fcinfo);
|
|
|
|
SvREFCNT_dec(perlret);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Perl likes to put a newline after its error messages; clean up such
|
|
*/
|
|
static char *
|
|
strip_trailing_ws(const char *msg)
|
|
{
|
|
char *res = pstrdup(msg);
|
|
int len = strlen(res);
|
|
|
|
while (len > 0 && isspace((unsigned char) res[len - 1]))
|
|
res[--len] = '\0';
|
|
return res;
|
|
}
|
|
|
|
|
|
/* Build a tuple from a hash. */
|
|
|
|
static HeapTuple
|
|
plperl_build_tuple_result(HV *perlhash, AttInMetadata *attinmeta)
|
|
{
|
|
TupleDesc td = attinmeta->tupdesc;
|
|
char **values;
|
|
SV *val;
|
|
char *key;
|
|
I32 klen;
|
|
HeapTuple tup;
|
|
|
|
values = (char **) palloc0(td->natts * sizeof(char *));
|
|
|
|
hv_iterinit(perlhash);
|
|
while ((val = hv_iternextsv(perlhash, &key, &klen)))
|
|
{
|
|
int attn = SPI_fnumber(td, key);
|
|
|
|
if (attn <= 0 || td->attrs[attn - 1]->attisdropped)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_UNDEFINED_COLUMN),
|
|
errmsg("Perl hash contains nonexistent column \"%s\"",
|
|
key)));
|
|
if (SvOK(val))
|
|
{
|
|
values[attn - 1] = sv2text_mbverified(val);
|
|
}
|
|
}
|
|
hv_iterinit(perlhash);
|
|
|
|
tup = BuildTupleFromCStrings(attinmeta, values);
|
|
pfree(values);
|
|
return tup;
|
|
}
|
|
|
|
/*
|
|
* convert perl array to postgres string representation
|
|
*/
|
|
static SV *
|
|
plperl_convert_to_pg_array(SV *src)
|
|
{
|
|
SV *rv;
|
|
int count;
|
|
dSP;
|
|
|
|
PUSHMARK(SP);
|
|
XPUSHs(src);
|
|
PUTBACK;
|
|
|
|
count = perl_call_pv("::encode_array_literal", G_SCALAR);
|
|
|
|
SPAGAIN;
|
|
|
|
if (count != 1)
|
|
elog(ERROR, "unexpected encode_array_literal failure");
|
|
|
|
rv = POPs;
|
|
|
|
PUTBACK;
|
|
|
|
return rv;
|
|
}
|
|
|
|
|
|
/* Set up the arguments for a trigger call. */
|
|
|
|
static SV *
|
|
plperl_trigger_build_args(FunctionCallInfo fcinfo)
|
|
{
|
|
TriggerData *tdata;
|
|
TupleDesc tupdesc;
|
|
int i;
|
|
char *level;
|
|
char *event;
|
|
char *relid;
|
|
char *when;
|
|
HV *hv;
|
|
|
|
hv = newHV();
|
|
hv_ksplit(hv, 12); /* pre-grow the hash */
|
|
|
|
tdata = (TriggerData *) fcinfo->context;
|
|
tupdesc = tdata->tg_relation->rd_att;
|
|
|
|
relid = DatumGetCString(
|
|
DirectFunctionCall1(oidout,
|
|
ObjectIdGetDatum(tdata->tg_relation->rd_id)
|
|
)
|
|
);
|
|
|
|
hv_store_string(hv, "name", newSVstring(tdata->tg_trigger->tgname));
|
|
hv_store_string(hv, "relid", newSVstring(relid));
|
|
|
|
if (TRIGGER_FIRED_BY_INSERT(tdata->tg_event))
|
|
{
|
|
event = "INSERT";
|
|
if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
|
|
hv_store_string(hv, "new",
|
|
plperl_hash_from_tuple(tdata->tg_trigtuple,
|
|
tupdesc));
|
|
}
|
|
else if (TRIGGER_FIRED_BY_DELETE(tdata->tg_event))
|
|
{
|
|
event = "DELETE";
|
|
if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
|
|
hv_store_string(hv, "old",
|
|
plperl_hash_from_tuple(tdata->tg_trigtuple,
|
|
tupdesc));
|
|
}
|
|
else if (TRIGGER_FIRED_BY_UPDATE(tdata->tg_event))
|
|
{
|
|
event = "UPDATE";
|
|
if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
|
|
{
|
|
hv_store_string(hv, "old",
|
|
plperl_hash_from_tuple(tdata->tg_trigtuple,
|
|
tupdesc));
|
|
hv_store_string(hv, "new",
|
|
plperl_hash_from_tuple(tdata->tg_newtuple,
|
|
tupdesc));
|
|
}
|
|
}
|
|
else if (TRIGGER_FIRED_BY_TRUNCATE(tdata->tg_event))
|
|
event = "TRUNCATE";
|
|
else
|
|
event = "UNKNOWN";
|
|
|
|
hv_store_string(hv, "event", newSVstring(event));
|
|
hv_store_string(hv, "argc", newSViv(tdata->tg_trigger->tgnargs));
|
|
|
|
if (tdata->tg_trigger->tgnargs > 0)
|
|
{
|
|
AV *av = newAV();
|
|
|
|
av_extend(av, tdata->tg_trigger->tgnargs);
|
|
for (i = 0; i < tdata->tg_trigger->tgnargs; i++)
|
|
av_push(av, newSVstring(tdata->tg_trigger->tgargs[i]));
|
|
hv_store_string(hv, "args", newRV_noinc((SV *) av));
|
|
}
|
|
|
|
hv_store_string(hv, "relname",
|
|
newSVstring(SPI_getrelname(tdata->tg_relation)));
|
|
|
|
hv_store_string(hv, "table_name",
|
|
newSVstring(SPI_getrelname(tdata->tg_relation)));
|
|
|
|
hv_store_string(hv, "table_schema",
|
|
newSVstring(SPI_getnspname(tdata->tg_relation)));
|
|
|
|
if (TRIGGER_FIRED_BEFORE(tdata->tg_event))
|
|
when = "BEFORE";
|
|
else if (TRIGGER_FIRED_AFTER(tdata->tg_event))
|
|
when = "AFTER";
|
|
else
|
|
when = "UNKNOWN";
|
|
hv_store_string(hv, "when", newSVstring(when));
|
|
|
|
if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
|
|
level = "ROW";
|
|
else if (TRIGGER_FIRED_FOR_STATEMENT(tdata->tg_event))
|
|
level = "STATEMENT";
|
|
else
|
|
level = "UNKNOWN";
|
|
hv_store_string(hv, "level", newSVstring(level));
|
|
|
|
return newRV_noinc((SV *) hv);
|
|
}
|
|
|
|
|
|
/* Set up the new tuple returned from a trigger. */
|
|
|
|
static HeapTuple
|
|
plperl_modify_tuple(HV *hvTD, TriggerData *tdata, HeapTuple otup)
|
|
{
|
|
SV **svp;
|
|
HV *hvNew;
|
|
HeapTuple rtup;
|
|
SV *val;
|
|
char *key;
|
|
I32 klen;
|
|
int slotsused;
|
|
int *modattrs;
|
|
Datum *modvalues;
|
|
char *modnulls;
|
|
|
|
TupleDesc tupdesc;
|
|
|
|
tupdesc = tdata->tg_relation->rd_att;
|
|
|
|
svp = hv_fetch_string(hvTD, "new");
|
|
if (!svp)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_UNDEFINED_COLUMN),
|
|
errmsg("$_TD->{new} does not exist")));
|
|
if (!SvOK(*svp) || SvTYPE(*svp) != SVt_RV || SvTYPE(SvRV(*svp)) != SVt_PVHV)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_DATATYPE_MISMATCH),
|
|
errmsg("$_TD->{new} is not a hash reference")));
|
|
hvNew = (HV *) SvRV(*svp);
|
|
|
|
modattrs = palloc(tupdesc->natts * sizeof(int));
|
|
modvalues = palloc(tupdesc->natts * sizeof(Datum));
|
|
modnulls = palloc(tupdesc->natts * sizeof(char));
|
|
slotsused = 0;
|
|
|
|
hv_iterinit(hvNew);
|
|
while ((val = hv_iternextsv(hvNew, &key, &klen)))
|
|
{
|
|
int attn = SPI_fnumber(tupdesc, key);
|
|
Oid typinput;
|
|
Oid typioparam;
|
|
int32 atttypmod;
|
|
FmgrInfo finfo;
|
|
|
|
if (attn <= 0 || tupdesc->attrs[attn - 1]->attisdropped)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_UNDEFINED_COLUMN),
|
|
errmsg("Perl hash contains nonexistent column \"%s\"",
|
|
key)));
|
|
/* XXX would be better to cache these lookups */
|
|
getTypeInputInfo(tupdesc->attrs[attn - 1]->atttypid,
|
|
&typinput, &typioparam);
|
|
fmgr_info(typinput, &finfo);
|
|
atttypmod = tupdesc->attrs[attn - 1]->atttypmod;
|
|
if (SvOK(val))
|
|
{
|
|
modvalues[slotsused] = InputFunctionCall(&finfo,
|
|
sv2text_mbverified(val),
|
|
typioparam,
|
|
atttypmod);
|
|
modnulls[slotsused] = ' ';
|
|
}
|
|
else
|
|
{
|
|
modvalues[slotsused] = InputFunctionCall(&finfo,
|
|
NULL,
|
|
typioparam,
|
|
atttypmod);
|
|
modnulls[slotsused] = 'n';
|
|
}
|
|
modattrs[slotsused] = attn;
|
|
slotsused++;
|
|
}
|
|
hv_iterinit(hvNew);
|
|
|
|
rtup = SPI_modifytuple(tdata->tg_relation, otup, slotsused,
|
|
modattrs, modvalues, modnulls);
|
|
|
|
pfree(modattrs);
|
|
pfree(modvalues);
|
|
pfree(modnulls);
|
|
|
|
if (rtup == NULL)
|
|
elog(ERROR, "SPI_modifytuple failed: %s",
|
|
SPI_result_code_string(SPI_result));
|
|
|
|
return rtup;
|
|
}
|
|
|
|
|
|
/*
|
|
* There are three externally visible pieces to plperl: plperl_call_handler,
|
|
* plperl_inline_handler, and plperl_validator.
|
|
*/
|
|
|
|
/*
|
|
* The call handler is called to run normal functions (including trigger
|
|
* functions) that are defined in pg_proc.
|
|
*/
|
|
PG_FUNCTION_INFO_V1(plperl_call_handler);
|
|
|
|
Datum
|
|
plperl_call_handler(PG_FUNCTION_ARGS)
|
|
{
|
|
Datum retval;
|
|
plperl_call_data *save_call_data = current_call_data;
|
|
bool oldcontext = trusted_context;
|
|
|
|
PG_TRY();
|
|
{
|
|
if (CALLED_AS_TRIGGER(fcinfo))
|
|
retval = PointerGetDatum(plperl_trigger_handler(fcinfo));
|
|
else
|
|
retval = plperl_func_handler(fcinfo);
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
current_call_data = save_call_data;
|
|
restore_context(oldcontext);
|
|
PG_RE_THROW();
|
|
}
|
|
PG_END_TRY();
|
|
|
|
current_call_data = save_call_data;
|
|
restore_context(oldcontext);
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
* The inline handler runs anonymous code blocks (DO blocks).
|
|
*/
|
|
PG_FUNCTION_INFO_V1(plperl_inline_handler);
|
|
|
|
Datum
|
|
plperl_inline_handler(PG_FUNCTION_ARGS)
|
|
{
|
|
InlineCodeBlock *codeblock = (InlineCodeBlock *) PG_GETARG_POINTER(0);
|
|
FunctionCallInfoData fake_fcinfo;
|
|
FmgrInfo flinfo;
|
|
plperl_proc_desc desc;
|
|
plperl_call_data *save_call_data = current_call_data;
|
|
bool oldcontext = trusted_context;
|
|
ErrorContextCallback pl_error_context;
|
|
|
|
/* Set up a callback for error reporting */
|
|
pl_error_context.callback = plperl_inline_callback;
|
|
pl_error_context.previous = error_context_stack;
|
|
pl_error_context.arg = (Datum) 0;
|
|
error_context_stack = &pl_error_context;
|
|
|
|
/*
|
|
* Set up a fake fcinfo and descriptor with just enough info to satisfy
|
|
* plperl_call_perl_func(). In particular note that this sets things up
|
|
* with no arguments passed, and a result type of VOID.
|
|
*/
|
|
MemSet(&fake_fcinfo, 0, sizeof(fake_fcinfo));
|
|
MemSet(&flinfo, 0, sizeof(flinfo));
|
|
MemSet(&desc, 0, sizeof(desc));
|
|
fake_fcinfo.flinfo = &flinfo;
|
|
flinfo.fn_oid = InvalidOid;
|
|
flinfo.fn_mcxt = CurrentMemoryContext;
|
|
|
|
desc.proname = "inline_code_block";
|
|
desc.fn_readonly = false;
|
|
|
|
desc.lanpltrusted = codeblock->langIsTrusted;
|
|
|
|
desc.fn_retistuple = false;
|
|
desc.fn_retisset = false;
|
|
desc.fn_retisarray = false;
|
|
desc.result_oid = VOIDOID;
|
|
desc.nargs = 0;
|
|
desc.reference = NULL;
|
|
|
|
current_call_data = (plperl_call_data *) palloc0(sizeof(plperl_call_data));
|
|
current_call_data->fcinfo = &fake_fcinfo;
|
|
current_call_data->prodesc = &desc;
|
|
|
|
PG_TRY();
|
|
{
|
|
SV *perlret;
|
|
|
|
if (SPI_connect() != SPI_OK_CONNECT)
|
|
elog(ERROR, "could not connect to SPI manager");
|
|
|
|
select_perl_context(desc.lanpltrusted);
|
|
|
|
plperl_create_sub(&desc, codeblock->source_text, 0);
|
|
|
|
if (!desc.reference) /* can this happen? */
|
|
elog(ERROR, "could not create internal procedure for anonymous code block");
|
|
|
|
perlret = plperl_call_perl_func(&desc, &fake_fcinfo);
|
|
|
|
SvREFCNT_dec(perlret);
|
|
|
|
if (SPI_finish() != SPI_OK_FINISH)
|
|
elog(ERROR, "SPI_finish() failed");
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
current_call_data = save_call_data;
|
|
restore_context(oldcontext);
|
|
if (desc.reference)
|
|
SvREFCNT_dec(desc.reference);
|
|
PG_RE_THROW();
|
|
}
|
|
PG_END_TRY();
|
|
|
|
current_call_data = save_call_data;
|
|
restore_context(oldcontext);
|
|
if (desc.reference)
|
|
SvREFCNT_dec(desc.reference);
|
|
|
|
error_context_stack = pl_error_context.previous;
|
|
|
|
PG_RETURN_VOID();
|
|
}
|
|
|
|
/*
|
|
* The validator is called during CREATE FUNCTION to validate the function
|
|
* being created/replaced. The precise behavior of the validator may be
|
|
* modified by the check_function_bodies GUC.
|
|
*/
|
|
PG_FUNCTION_INFO_V1(plperl_validator);
|
|
|
|
Datum
|
|
plperl_validator(PG_FUNCTION_ARGS)
|
|
{
|
|
Oid funcoid = PG_GETARG_OID(0);
|
|
HeapTuple tuple;
|
|
Form_pg_proc proc;
|
|
char functyptype;
|
|
int numargs;
|
|
Oid *argtypes;
|
|
char **argnames;
|
|
char *argmodes;
|
|
bool istrigger = false;
|
|
int i;
|
|
|
|
/* Get the new function's pg_proc entry */
|
|
tuple = SearchSysCache(PROCOID,
|
|
ObjectIdGetDatum(funcoid),
|
|
0, 0, 0);
|
|
if (!HeapTupleIsValid(tuple))
|
|
elog(ERROR, "cache lookup failed for function %u", funcoid);
|
|
proc = (Form_pg_proc) GETSTRUCT(tuple);
|
|
|
|
functyptype = get_typtype(proc->prorettype);
|
|
|
|
/* Disallow pseudotype result */
|
|
/* except for TRIGGER, RECORD, or VOID */
|
|
if (functyptype == TYPTYPE_PSEUDO)
|
|
{
|
|
/* we assume OPAQUE with no arguments means a trigger */
|
|
if (proc->prorettype == TRIGGEROID ||
|
|
(proc->prorettype == OPAQUEOID && proc->pronargs == 0))
|
|
istrigger = true;
|
|
else if (proc->prorettype != RECORDOID &&
|
|
proc->prorettype != VOIDOID)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("PL/Perl functions cannot return type %s",
|
|
format_type_be(proc->prorettype))));
|
|
}
|
|
|
|
/* Disallow pseudotypes in arguments (either IN or OUT) */
|
|
numargs = get_func_arg_info(tuple,
|
|
&argtypes, &argnames, &argmodes);
|
|
for (i = 0; i < numargs; i++)
|
|
{
|
|
if (get_typtype(argtypes[i]) == TYPTYPE_PSEUDO)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("PL/Perl functions cannot accept type %s",
|
|
format_type_be(argtypes[i]))));
|
|
}
|
|
|
|
ReleaseSysCache(tuple);
|
|
|
|
/* Postpone body checks if !check_function_bodies */
|
|
if (check_function_bodies)
|
|
{
|
|
(void) compile_plperl_function(funcoid, istrigger);
|
|
}
|
|
|
|
/* the result of a validator is ignored */
|
|
PG_RETURN_VOID();
|
|
}
|
|
|
|
|
|
/*
|
|
* Uses mksafefunc/mkunsafefunc to create a subroutine whose text is
|
|
* supplied in s, and returns a reference to it
|
|
*/
|
|
static void
|
|
plperl_create_sub(plperl_proc_desc *prodesc, char *s, Oid fn_oid)
|
|
{
|
|
dSP;
|
|
bool trusted = prodesc->lanpltrusted;
|
|
char subname[NAMEDATALEN+40];
|
|
HV *pragma_hv = newHV();
|
|
SV *subref = NULL;
|
|
int count;
|
|
char *compile_sub;
|
|
|
|
sprintf(subname, "%s__%u", prodesc->proname, fn_oid);
|
|
|
|
if (plperl_use_strict)
|
|
hv_store_string(pragma_hv, "strict", (SV*)newAV());
|
|
|
|
ENTER;
|
|
SAVETMPS;
|
|
PUSHMARK(SP);
|
|
EXTEND(SP,4);
|
|
PUSHs(sv_2mortal(newSVstring(subname)));
|
|
PUSHs(sv_2mortal(newRV_noinc((SV*)pragma_hv)));
|
|
PUSHs(sv_2mortal(newSVstring("our $_TD; local $_TD=shift;")));
|
|
PUSHs(sv_2mortal(newSVstring(s)));
|
|
PUTBACK;
|
|
|
|
/*
|
|
* G_KEEPERR seems to be needed here, else we don't recognize compile
|
|
* errors properly. Perhaps it's because there's another level of eval
|
|
* inside mksafefunc?
|
|
*/
|
|
compile_sub = (trusted) ? "::mksafefunc" : "::mkunsafefunc";
|
|
count = perl_call_pv(compile_sub, G_SCALAR | G_EVAL | G_KEEPERR);
|
|
SPAGAIN;
|
|
|
|
if (count == 1) {
|
|
GV *sub_glob = (GV*)POPs;
|
|
if (sub_glob && SvTYPE(sub_glob) == SVt_PVGV) {
|
|
SV *sv = (SV*)GvCVu((GV*)sub_glob);
|
|
if (sv)
|
|
subref = newRV_inc(sv);
|
|
}
|
|
}
|
|
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
|
|
if (SvTRUE(ERRSV))
|
|
{
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_SYNTAX_ERROR),
|
|
errmsg("%s", strip_trailing_ws(SvPV_nolen(ERRSV)))));
|
|
}
|
|
|
|
if (!subref)
|
|
{
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INTERNAL_ERROR),
|
|
errmsg("didn't get a GLOB from compiling %s via %s", prodesc->proname, compile_sub)));
|
|
}
|
|
|
|
prodesc->reference = newSVsv(subref);
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* plperl_init_shared_libs() -
|
|
*
|
|
* We cannot use the DynaLoader directly to get at the Opcode
|
|
* module (used by Safe.pm). So, we link Opcode into ourselves
|
|
* and do the initialization behind perl's back.
|
|
*
|
|
**********************************************************************/
|
|
|
|
static void
|
|
plperl_init_shared_libs(pTHX)
|
|
{
|
|
char *file = __FILE__;
|
|
EXTERN_C void boot_DynaLoader(pTHX_ CV *cv);
|
|
EXTERN_C void boot_PostgreSQL__InServer__Util(pTHX_ CV *cv);
|
|
|
|
newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
|
|
newXS("PostgreSQL::InServer::Util::bootstrap",
|
|
boot_PostgreSQL__InServer__Util, file);
|
|
}
|
|
|
|
|
|
static SV *
|
|
plperl_call_perl_func(plperl_proc_desc *desc, FunctionCallInfo fcinfo)
|
|
{
|
|
dSP;
|
|
SV *retval;
|
|
int i;
|
|
int count;
|
|
SV *sv;
|
|
|
|
ENTER;
|
|
SAVETMPS;
|
|
|
|
PUSHMARK(SP);
|
|
EXTEND(sp, 1 + desc->nargs);
|
|
|
|
PUSHs(&PL_sv_undef); /* no trigger data */
|
|
|
|
for (i = 0; i < desc->nargs; i++)
|
|
{
|
|
if (fcinfo->argnull[i])
|
|
PUSHs(&PL_sv_undef);
|
|
else if (desc->arg_is_rowtype[i])
|
|
{
|
|
HeapTupleHeader td;
|
|
Oid tupType;
|
|
int32 tupTypmod;
|
|
TupleDesc tupdesc;
|
|
HeapTupleData tmptup;
|
|
SV *hashref;
|
|
|
|
td = DatumGetHeapTupleHeader(fcinfo->arg[i]);
|
|
/* Extract rowtype info and find a tupdesc */
|
|
tupType = HeapTupleHeaderGetTypeId(td);
|
|
tupTypmod = HeapTupleHeaderGetTypMod(td);
|
|
tupdesc = lookup_rowtype_tupdesc(tupType, tupTypmod);
|
|
/* Build a temporary HeapTuple control structure */
|
|
tmptup.t_len = HeapTupleHeaderGetDatumLength(td);
|
|
tmptup.t_data = td;
|
|
|
|
hashref = plperl_hash_from_tuple(&tmptup, tupdesc);
|
|
PUSHs(sv_2mortal(hashref));
|
|
ReleaseTupleDesc(tupdesc);
|
|
}
|
|
else
|
|
{
|
|
char *tmp;
|
|
|
|
tmp = OutputFunctionCall(&(desc->arg_out_func[i]),
|
|
fcinfo->arg[i]);
|
|
sv = newSVstring(tmp);
|
|
PUSHs(sv_2mortal(sv));
|
|
pfree(tmp);
|
|
}
|
|
}
|
|
PUTBACK;
|
|
|
|
/* Do NOT use G_KEEPERR here */
|
|
count = perl_call_sv(desc->reference, G_SCALAR | G_EVAL);
|
|
|
|
SPAGAIN;
|
|
|
|
if (count != 1)
|
|
{
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
elog(ERROR, "didn't get a return item from function");
|
|
}
|
|
|
|
if (SvTRUE(ERRSV))
|
|
{
|
|
(void) POPs;
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
/* XXX need to find a way to assign an errcode here */
|
|
ereport(ERROR,
|
|
(errmsg("%s", strip_trailing_ws(SvPV_nolen(ERRSV)))));
|
|
}
|
|
|
|
retval = newSVsv(POPs);
|
|
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
static SV *
|
|
plperl_call_perl_trigger_func(plperl_proc_desc *desc, FunctionCallInfo fcinfo,
|
|
SV *td)
|
|
{
|
|
dSP;
|
|
SV *retval;
|
|
Trigger *tg_trigger;
|
|
int i;
|
|
int count;
|
|
|
|
ENTER;
|
|
SAVETMPS;
|
|
|
|
PUSHMARK(sp);
|
|
|
|
XPUSHs(td);
|
|
|
|
tg_trigger = ((TriggerData *) fcinfo->context)->tg_trigger;
|
|
for (i = 0; i < tg_trigger->tgnargs; i++)
|
|
XPUSHs(sv_2mortal(newSVstring(tg_trigger->tgargs[i])));
|
|
PUTBACK;
|
|
|
|
/* Do NOT use G_KEEPERR here */
|
|
count = perl_call_sv(desc->reference, G_SCALAR | G_EVAL);
|
|
|
|
SPAGAIN;
|
|
|
|
if (count != 1)
|
|
{
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
elog(ERROR, "didn't get a return item from trigger function");
|
|
}
|
|
|
|
if (SvTRUE(ERRSV))
|
|
{
|
|
(void) POPs;
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
/* XXX need to find a way to assign an errcode here */
|
|
ereport(ERROR,
|
|
(errmsg("%s", strip_trailing_ws(SvPV_nolen(ERRSV)))));
|
|
}
|
|
|
|
retval = newSVsv(POPs);
|
|
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
static Datum
|
|
plperl_func_handler(PG_FUNCTION_ARGS)
|
|
{
|
|
plperl_proc_desc *prodesc;
|
|
SV *perlret;
|
|
Datum retval;
|
|
ReturnSetInfo *rsi;
|
|
SV *array_ret = NULL;
|
|
ErrorContextCallback pl_error_context;
|
|
|
|
/*
|
|
* Create the call_data beforing connecting to SPI, so that it is not
|
|
* allocated in the SPI memory context
|
|
*/
|
|
current_call_data = (plperl_call_data *) palloc0(sizeof(plperl_call_data));
|
|
current_call_data->fcinfo = fcinfo;
|
|
|
|
if (SPI_connect() != SPI_OK_CONNECT)
|
|
elog(ERROR, "could not connect to SPI manager");
|
|
|
|
prodesc = compile_plperl_function(fcinfo->flinfo->fn_oid, false);
|
|
current_call_data->prodesc = prodesc;
|
|
|
|
/* Set a callback for error reporting */
|
|
pl_error_context.callback = plperl_exec_callback;
|
|
pl_error_context.previous = error_context_stack;
|
|
pl_error_context.arg = prodesc->proname;
|
|
error_context_stack = &pl_error_context;
|
|
|
|
rsi = (ReturnSetInfo *) fcinfo->resultinfo;
|
|
|
|
if (prodesc->fn_retisset)
|
|
{
|
|
/* Check context before allowing the call to go through */
|
|
if (!rsi || !IsA(rsi, ReturnSetInfo) ||
|
|
(rsi->allowedModes & SFRM_Materialize) == 0 ||
|
|
rsi->expectedDesc == NULL)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("set-valued function called in context that "
|
|
"cannot accept a set")));
|
|
}
|
|
|
|
select_perl_context(prodesc->lanpltrusted);
|
|
|
|
perlret = plperl_call_perl_func(prodesc, fcinfo);
|
|
|
|
/************************************************************
|
|
* Disconnect from SPI manager and then create the return
|
|
* values datum (if the input function does a palloc for it
|
|
* this must not be allocated in the SPI memory context
|
|
* because SPI_finish would free it).
|
|
************************************************************/
|
|
if (SPI_finish() != SPI_OK_FINISH)
|
|
elog(ERROR, "SPI_finish() failed");
|
|
|
|
if (prodesc->fn_retisset)
|
|
{
|
|
/*
|
|
* If the Perl function returned an arrayref, we pretend that it
|
|
* called return_next() for each element of the array, to handle old
|
|
* SRFs that didn't know about return_next(). Any other sort of return
|
|
* value is an error, except undef which means return an empty set.
|
|
*/
|
|
if (SvOK(perlret) &&
|
|
SvTYPE(perlret) == SVt_RV &&
|
|
SvTYPE(SvRV(perlret)) == SVt_PVAV)
|
|
{
|
|
int i = 0;
|
|
SV **svp = 0;
|
|
AV *rav = (AV *) SvRV(perlret);
|
|
|
|
while ((svp = av_fetch(rav, i, FALSE)) != NULL)
|
|
{
|
|
plperl_return_next(*svp);
|
|
i++;
|
|
}
|
|
}
|
|
else if (SvOK(perlret))
|
|
{
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_DATATYPE_MISMATCH),
|
|
errmsg("set-returning PL/Perl function must return "
|
|
"reference to array or use return_next")));
|
|
}
|
|
|
|
rsi->returnMode = SFRM_Materialize;
|
|
if (current_call_data->tuple_store)
|
|
{
|
|
rsi->setResult = current_call_data->tuple_store;
|
|
rsi->setDesc = current_call_data->ret_tdesc;
|
|
}
|
|
retval = (Datum) 0;
|
|
}
|
|
else if (!SvOK(perlret))
|
|
{
|
|
/* Return NULL if Perl code returned undef */
|
|
if (rsi && IsA(rsi, ReturnSetInfo))
|
|
rsi->isDone = ExprEndResult;
|
|
retval = InputFunctionCall(&prodesc->result_in_func, NULL,
|
|
prodesc->result_typioparam, -1);
|
|
fcinfo->isnull = true;
|
|
}
|
|
else if (prodesc->fn_retistuple)
|
|
{
|
|
/* Return a perl hash converted to a Datum */
|
|
TupleDesc td;
|
|
AttInMetadata *attinmeta;
|
|
HeapTuple tup;
|
|
|
|
if (!SvOK(perlret) || SvTYPE(perlret) != SVt_RV ||
|
|
SvTYPE(SvRV(perlret)) != SVt_PVHV)
|
|
{
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_DATATYPE_MISMATCH),
|
|
errmsg("composite-returning PL/Perl function "
|
|
"must return reference to hash")));
|
|
}
|
|
|
|
/* XXX should cache the attinmeta data instead of recomputing */
|
|
if (get_call_result_type(fcinfo, NULL, &td) != TYPEFUNC_COMPOSITE)
|
|
{
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("function returning record called in context "
|
|
"that cannot accept type record")));
|
|
}
|
|
|
|
attinmeta = TupleDescGetAttInMetadata(td);
|
|
tup = plperl_build_tuple_result((HV *) SvRV(perlret), attinmeta);
|
|
retval = HeapTupleGetDatum(tup);
|
|
}
|
|
else
|
|
{
|
|
/* Return a perl string converted to a Datum */
|
|
|
|
if (prodesc->fn_retisarray && SvROK(perlret) &&
|
|
SvTYPE(SvRV(perlret)) == SVt_PVAV)
|
|
{
|
|
array_ret = plperl_convert_to_pg_array(perlret);
|
|
SvREFCNT_dec(perlret);
|
|
perlret = array_ret;
|
|
}
|
|
|
|
retval = InputFunctionCall(&prodesc->result_in_func,
|
|
sv2text_mbverified(perlret),
|
|
prodesc->result_typioparam, -1);
|
|
}
|
|
|
|
/* Restore the previous error callback */
|
|
error_context_stack = pl_error_context.previous;
|
|
|
|
if (array_ret == NULL)
|
|
SvREFCNT_dec(perlret);
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
static Datum
|
|
plperl_trigger_handler(PG_FUNCTION_ARGS)
|
|
{
|
|
plperl_proc_desc *prodesc;
|
|
SV *perlret;
|
|
Datum retval;
|
|
SV *svTD;
|
|
HV *hvTD;
|
|
ErrorContextCallback pl_error_context;
|
|
|
|
/*
|
|
* Create the call_data beforing connecting to SPI, so that it is not
|
|
* allocated in the SPI memory context
|
|
*/
|
|
current_call_data = (plperl_call_data *) palloc0(sizeof(plperl_call_data));
|
|
current_call_data->fcinfo = fcinfo;
|
|
|
|
/* Connect to SPI manager */
|
|
if (SPI_connect() != SPI_OK_CONNECT)
|
|
elog(ERROR, "could not connect to SPI manager");
|
|
|
|
/* Find or compile the function */
|
|
prodesc = compile_plperl_function(fcinfo->flinfo->fn_oid, true);
|
|
current_call_data->prodesc = prodesc;
|
|
|
|
/* Set a callback for error reporting */
|
|
pl_error_context.callback = plperl_exec_callback;
|
|
pl_error_context.previous = error_context_stack;
|
|
pl_error_context.arg = prodesc->proname;
|
|
error_context_stack = &pl_error_context;
|
|
|
|
select_perl_context(prodesc->lanpltrusted);
|
|
|
|
svTD = plperl_trigger_build_args(fcinfo);
|
|
perlret = plperl_call_perl_trigger_func(prodesc, fcinfo, svTD);
|
|
hvTD = (HV *) SvRV(svTD);
|
|
|
|
/************************************************************
|
|
* Disconnect from SPI manager and then create the return
|
|
* values datum (if the input function does a palloc for it
|
|
* this must not be allocated in the SPI memory context
|
|
* because SPI_finish would free it).
|
|
************************************************************/
|
|
if (SPI_finish() != SPI_OK_FINISH)
|
|
elog(ERROR, "SPI_finish() failed");
|
|
|
|
if (perlret == NULL || !SvOK(perlret))
|
|
{
|
|
/* undef result means go ahead with original tuple */
|
|
TriggerData *trigdata = ((TriggerData *) fcinfo->context);
|
|
|
|
if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
|
|
retval = (Datum) trigdata->tg_trigtuple;
|
|
else if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
|
|
retval = (Datum) trigdata->tg_newtuple;
|
|
else if (TRIGGER_FIRED_BY_DELETE(trigdata->tg_event))
|
|
retval = (Datum) trigdata->tg_trigtuple;
|
|
else if (TRIGGER_FIRED_BY_TRUNCATE(trigdata->tg_event))
|
|
retval = (Datum) trigdata->tg_trigtuple;
|
|
else
|
|
retval = (Datum) 0; /* can this happen? */
|
|
}
|
|
else
|
|
{
|
|
HeapTuple trv;
|
|
char *tmp;
|
|
|
|
tmp = SvPV_nolen(perlret);
|
|
|
|
if (pg_strcasecmp(tmp, "SKIP") == 0)
|
|
trv = NULL;
|
|
else if (pg_strcasecmp(tmp, "MODIFY") == 0)
|
|
{
|
|
TriggerData *trigdata = (TriggerData *) fcinfo->context;
|
|
|
|
if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
|
|
trv = plperl_modify_tuple(hvTD, trigdata,
|
|
trigdata->tg_trigtuple);
|
|
else if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
|
|
trv = plperl_modify_tuple(hvTD, trigdata,
|
|
trigdata->tg_newtuple);
|
|
else
|
|
{
|
|
ereport(WARNING,
|
|
(errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
|
|
errmsg("ignoring modified row in DELETE trigger")));
|
|
trv = NULL;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
|
|
errmsg("result of PL/Perl trigger function must be undef, "
|
|
"\"SKIP\", or \"MODIFY\"")));
|
|
trv = NULL;
|
|
}
|
|
retval = PointerGetDatum(trv);
|
|
}
|
|
|
|
/* Restore the previous error callback */
|
|
error_context_stack = pl_error_context.previous;
|
|
|
|
SvREFCNT_dec(svTD);
|
|
if (perlret)
|
|
SvREFCNT_dec(perlret);
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
static plperl_proc_desc *
|
|
compile_plperl_function(Oid fn_oid, bool is_trigger)
|
|
{
|
|
HeapTuple procTup;
|
|
Form_pg_proc procStruct;
|
|
char internal_proname[NAMEDATALEN];
|
|
plperl_proc_desc *prodesc = NULL;
|
|
int i;
|
|
plperl_proc_entry *hash_entry;
|
|
bool found;
|
|
bool oldcontext = trusted_context;
|
|
ErrorContextCallback plperl_error_context;
|
|
|
|
/* We'll need the pg_proc tuple in any case... */
|
|
procTup = SearchSysCache(PROCOID,
|
|
ObjectIdGetDatum(fn_oid),
|
|
0, 0, 0);
|
|
if (!HeapTupleIsValid(procTup))
|
|
elog(ERROR, "cache lookup failed for function %u", fn_oid);
|
|
procStruct = (Form_pg_proc) GETSTRUCT(procTup);
|
|
|
|
/* Set a callback for reporting compilation errors */
|
|
plperl_error_context.callback = plperl_compile_callback;
|
|
plperl_error_context.previous = error_context_stack;
|
|
plperl_error_context.arg = NameStr(procStruct->proname);
|
|
error_context_stack = &plperl_error_context;
|
|
|
|
/************************************************************
|
|
* Build our internal proc name from the function's Oid
|
|
************************************************************/
|
|
if (!is_trigger)
|
|
sprintf(internal_proname, "__PLPerl_proc_%u", fn_oid);
|
|
else
|
|
sprintf(internal_proname, "__PLPerl_proc_%u_trigger", fn_oid);
|
|
|
|
/************************************************************
|
|
* Lookup the internal proc name in the hashtable
|
|
************************************************************/
|
|
hash_entry = hash_search(plperl_proc_hash, internal_proname,
|
|
HASH_FIND, NULL);
|
|
|
|
if (hash_entry)
|
|
{
|
|
bool uptodate;
|
|
|
|
prodesc = hash_entry->proc_data;
|
|
|
|
/************************************************************
|
|
* If it's present, must check whether it's still up to date.
|
|
* This is needed because CREATE OR REPLACE FUNCTION can modify the
|
|
* function's pg_proc entry without changing its OID.
|
|
************************************************************/
|
|
uptodate = (prodesc->fn_xmin == HeapTupleHeaderGetXmin(procTup->t_data) &&
|
|
ItemPointerEquals(&prodesc->fn_tid, &procTup->t_self));
|
|
|
|
if (!uptodate)
|
|
{
|
|
hash_search(plperl_proc_hash, internal_proname,
|
|
HASH_REMOVE, NULL);
|
|
if (prodesc->reference)
|
|
SvREFCNT_dec(prodesc->reference);
|
|
free(prodesc->proname);
|
|
free(prodesc);
|
|
prodesc = NULL;
|
|
}
|
|
}
|
|
|
|
/************************************************************
|
|
* If we haven't found it in the hashtable, we analyze
|
|
* the function's arguments and return type and store
|
|
* the in-/out-functions in the prodesc block and create
|
|
* a new hashtable entry for it.
|
|
*
|
|
* Then we load the procedure into the Perl interpreter.
|
|
************************************************************/
|
|
if (prodesc == NULL)
|
|
{
|
|
HeapTuple langTup;
|
|
HeapTuple typeTup;
|
|
Form_pg_language langStruct;
|
|
Form_pg_type typeStruct;
|
|
Datum prosrcdatum;
|
|
bool isnull;
|
|
char *proc_source;
|
|
|
|
/************************************************************
|
|
* Allocate a new procedure description block
|
|
************************************************************/
|
|
prodesc = (plperl_proc_desc *) malloc(sizeof(plperl_proc_desc));
|
|
if (prodesc == NULL)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_OUT_OF_MEMORY),
|
|
errmsg("out of memory")));
|
|
MemSet(prodesc, 0, sizeof(plperl_proc_desc));
|
|
prodesc->proname = strdup(NameStr(procStruct->proname));
|
|
prodesc->fn_xmin = HeapTupleHeaderGetXmin(procTup->t_data);
|
|
prodesc->fn_tid = procTup->t_self;
|
|
|
|
/* Remember if function is STABLE/IMMUTABLE */
|
|
prodesc->fn_readonly =
|
|
(procStruct->provolatile != PROVOLATILE_VOLATILE);
|
|
|
|
/************************************************************
|
|
* Lookup the pg_language tuple by Oid
|
|
************************************************************/
|
|
langTup = SearchSysCache(LANGOID,
|
|
ObjectIdGetDatum(procStruct->prolang),
|
|
0, 0, 0);
|
|
if (!HeapTupleIsValid(langTup))
|
|
{
|
|
free(prodesc->proname);
|
|
free(prodesc);
|
|
elog(ERROR, "cache lookup failed for language %u",
|
|
procStruct->prolang);
|
|
}
|
|
langStruct = (Form_pg_language) GETSTRUCT(langTup);
|
|
prodesc->lanpltrusted = langStruct->lanpltrusted;
|
|
ReleaseSysCache(langTup);
|
|
|
|
/************************************************************
|
|
* Get the required information for input conversion of the
|
|
* return value.
|
|
************************************************************/
|
|
if (!is_trigger)
|
|
{
|
|
typeTup = SearchSysCache(TYPEOID,
|
|
ObjectIdGetDatum(procStruct->prorettype),
|
|
0, 0, 0);
|
|
if (!HeapTupleIsValid(typeTup))
|
|
{
|
|
free(prodesc->proname);
|
|
free(prodesc);
|
|
elog(ERROR, "cache lookup failed for type %u",
|
|
procStruct->prorettype);
|
|
}
|
|
typeStruct = (Form_pg_type) GETSTRUCT(typeTup);
|
|
|
|
/* Disallow pseudotype result, except VOID or RECORD */
|
|
if (typeStruct->typtype == TYPTYPE_PSEUDO)
|
|
{
|
|
if (procStruct->prorettype == VOIDOID ||
|
|
procStruct->prorettype == RECORDOID)
|
|
/* okay */ ;
|
|
else if (procStruct->prorettype == TRIGGEROID)
|
|
{
|
|
free(prodesc->proname);
|
|
free(prodesc);
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("trigger functions can only be called "
|
|
"as triggers")));
|
|
}
|
|
else
|
|
{
|
|
free(prodesc->proname);
|
|
free(prodesc);
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("PL/Perl functions cannot return type %s",
|
|
format_type_be(procStruct->prorettype))));
|
|
}
|
|
}
|
|
|
|
prodesc->result_oid = procStruct->prorettype;
|
|
prodesc->fn_retisset = procStruct->proretset;
|
|
prodesc->fn_retistuple = (procStruct->prorettype == RECORDOID ||
|
|
typeStruct->typtype == TYPTYPE_COMPOSITE);
|
|
|
|
prodesc->fn_retisarray =
|
|
(typeStruct->typlen == -1 && typeStruct->typelem);
|
|
|
|
perm_fmgr_info(typeStruct->typinput, &(prodesc->result_in_func));
|
|
prodesc->result_typioparam = getTypeIOParam(typeTup);
|
|
|
|
ReleaseSysCache(typeTup);
|
|
}
|
|
|
|
/************************************************************
|
|
* Get the required information for output conversion
|
|
* of all procedure arguments
|
|
************************************************************/
|
|
if (!is_trigger)
|
|
{
|
|
prodesc->nargs = procStruct->pronargs;
|
|
for (i = 0; i < prodesc->nargs; i++)
|
|
{
|
|
typeTup = SearchSysCache(TYPEOID,
|
|
ObjectIdGetDatum(procStruct->proargtypes.values[i]),
|
|
0, 0, 0);
|
|
if (!HeapTupleIsValid(typeTup))
|
|
{
|
|
free(prodesc->proname);
|
|
free(prodesc);
|
|
elog(ERROR, "cache lookup failed for type %u",
|
|
procStruct->proargtypes.values[i]);
|
|
}
|
|
typeStruct = (Form_pg_type) GETSTRUCT(typeTup);
|
|
|
|
/* Disallow pseudotype argument */
|
|
if (typeStruct->typtype == TYPTYPE_PSEUDO)
|
|
{
|
|
free(prodesc->proname);
|
|
free(prodesc);
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("PL/Perl functions cannot accept type %s",
|
|
format_type_be(procStruct->proargtypes.values[i]))));
|
|
}
|
|
|
|
if (typeStruct->typtype == TYPTYPE_COMPOSITE)
|
|
prodesc->arg_is_rowtype[i] = true;
|
|
else
|
|
{
|
|
prodesc->arg_is_rowtype[i] = false;
|
|
perm_fmgr_info(typeStruct->typoutput,
|
|
&(prodesc->arg_out_func[i]));
|
|
}
|
|
|
|
ReleaseSysCache(typeTup);
|
|
}
|
|
}
|
|
|
|
/************************************************************
|
|
* create the text of the anonymous subroutine.
|
|
* we do not use a named subroutine so that we can call directly
|
|
* through the reference.
|
|
************************************************************/
|
|
prosrcdatum = SysCacheGetAttr(PROCOID, procTup,
|
|
Anum_pg_proc_prosrc, &isnull);
|
|
if (isnull)
|
|
elog(ERROR, "null prosrc");
|
|
proc_source = TextDatumGetCString(prosrcdatum);
|
|
|
|
/************************************************************
|
|
* Create the procedure in the interpreter
|
|
************************************************************/
|
|
|
|
select_perl_context(prodesc->lanpltrusted);
|
|
|
|
plperl_create_sub(prodesc, proc_source, fn_oid);
|
|
|
|
restore_context(oldcontext);
|
|
|
|
pfree(proc_source);
|
|
if (!prodesc->reference) /* can this happen? */
|
|
{
|
|
free(prodesc->proname);
|
|
free(prodesc);
|
|
elog(ERROR, "could not create internal procedure \"%s\"",
|
|
internal_proname);
|
|
}
|
|
|
|
hash_entry = hash_search(plperl_proc_hash, internal_proname,
|
|
HASH_ENTER, &found);
|
|
hash_entry->proc_data = prodesc;
|
|
}
|
|
|
|
/* restore previous error callback */
|
|
error_context_stack = plperl_error_context.previous;
|
|
|
|
ReleaseSysCache(procTup);
|
|
|
|
return prodesc;
|
|
}
|
|
|
|
|
|
/* Build a hash from all attributes of a given tuple. */
|
|
|
|
static SV *
|
|
plperl_hash_from_tuple(HeapTuple tuple, TupleDesc tupdesc)
|
|
{
|
|
HV *hv;
|
|
int i;
|
|
|
|
hv = newHV();
|
|
hv_ksplit(hv, tupdesc->natts); /* pre-grow the hash */
|
|
|
|
for (i = 0; i < tupdesc->natts; i++)
|
|
{
|
|
Datum attr;
|
|
bool isnull;
|
|
char *attname;
|
|
char *outputstr;
|
|
Oid typoutput;
|
|
bool typisvarlena;
|
|
|
|
if (tupdesc->attrs[i]->attisdropped)
|
|
continue;
|
|
|
|
attname = NameStr(tupdesc->attrs[i]->attname);
|
|
attr = heap_getattr(tuple, i + 1, tupdesc, &isnull);
|
|
|
|
if (isnull)
|
|
{
|
|
/* Store (attname => undef) and move on. */
|
|
hv_store_string(hv, attname, newSV(0));
|
|
continue;
|
|
}
|
|
|
|
/* XXX should have a way to cache these lookups */
|
|
getTypeOutputInfo(tupdesc->attrs[i]->atttypid,
|
|
&typoutput, &typisvarlena);
|
|
|
|
outputstr = OidOutputFunctionCall(typoutput, attr);
|
|
|
|
hv_store_string(hv, attname, newSVstring(outputstr));
|
|
|
|
pfree(outputstr);
|
|
}
|
|
|
|
return newRV_noinc((SV *) hv);
|
|
}
|
|
|
|
|
|
static void
|
|
check_spi_usage_allowed()
|
|
{
|
|
if (plperl_ending) {
|
|
/* simple croak as we don't want to involve PostgreSQL code */
|
|
croak("SPI functions can not be used in END blocks");
|
|
}
|
|
}
|
|
|
|
|
|
HV *
|
|
plperl_spi_exec(char *query, int limit)
|
|
{
|
|
HV *ret_hv;
|
|
|
|
/*
|
|
* Execute the query inside a sub-transaction, so we can cope with errors
|
|
* sanely
|
|
*/
|
|
MemoryContext oldcontext = CurrentMemoryContext;
|
|
ResourceOwner oldowner = CurrentResourceOwner;
|
|
|
|
check_spi_usage_allowed();
|
|
|
|
BeginInternalSubTransaction(NULL);
|
|
/* Want to run inside function's memory context */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
|
|
PG_TRY();
|
|
{
|
|
int spi_rv;
|
|
|
|
spi_rv = SPI_execute(query, current_call_data->prodesc->fn_readonly,
|
|
limit);
|
|
ret_hv = plperl_spi_execute_fetch_result(SPI_tuptable, SPI_processed,
|
|
spi_rv);
|
|
|
|
/* Commit the inner transaction, return to outer xact context */
|
|
ReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/*
|
|
* AtEOSubXact_SPI() should not have popped any SPI context, but just
|
|
* in case it did, make sure we remain connected.
|
|
*/
|
|
SPI_restore_connection();
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
ErrorData *edata;
|
|
|
|
/* Save error info */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
edata = CopyErrorData();
|
|
FlushErrorState();
|
|
|
|
/* Abort the inner transaction */
|
|
RollbackAndReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/*
|
|
* If AtEOSubXact_SPI() popped any SPI context of the subxact, it will
|
|
* have left us in a disconnected state. We need this hack to return
|
|
* to connected state.
|
|
*/
|
|
SPI_restore_connection();
|
|
|
|
/* Punt the error to Perl */
|
|
croak("%s", edata->message);
|
|
|
|
/* Can't get here, but keep compiler quiet */
|
|
return NULL;
|
|
}
|
|
PG_END_TRY();
|
|
|
|
return ret_hv;
|
|
}
|
|
|
|
|
|
static HV *
|
|
plperl_spi_execute_fetch_result(SPITupleTable *tuptable, int processed,
|
|
int status)
|
|
{
|
|
HV *result;
|
|
|
|
check_spi_usage_allowed();
|
|
|
|
result = newHV();
|
|
|
|
hv_store_string(result, "status",
|
|
newSVstring(SPI_result_code_string(status)));
|
|
hv_store_string(result, "processed",
|
|
newSViv(processed));
|
|
|
|
if (status > 0 && tuptable)
|
|
{
|
|
AV *rows;
|
|
SV *row;
|
|
int i;
|
|
|
|
rows = newAV();
|
|
av_extend(rows, processed);
|
|
for (i = 0; i < processed; i++)
|
|
{
|
|
row = plperl_hash_from_tuple(tuptable->vals[i], tuptable->tupdesc);
|
|
av_push(rows, row);
|
|
}
|
|
hv_store_string(result, "rows",
|
|
newRV_noinc((SV *) rows));
|
|
}
|
|
|
|
SPI_freetuptable(tuptable);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
/*
|
|
* Note: plperl_return_next is called both in Postgres and Perl contexts.
|
|
* We report any errors in Postgres fashion (via ereport). If called in
|
|
* Perl context, it is SPI.xs's responsibility to catch the error and
|
|
* convert to a Perl error. We assume (perhaps without adequate justification)
|
|
* that we need not abort the current transaction if the Perl code traps the
|
|
* error.
|
|
*/
|
|
void
|
|
plperl_return_next(SV *sv)
|
|
{
|
|
plperl_proc_desc *prodesc;
|
|
FunctionCallInfo fcinfo;
|
|
ReturnSetInfo *rsi;
|
|
MemoryContext old_cxt;
|
|
|
|
if (!sv)
|
|
return;
|
|
|
|
prodesc = current_call_data->prodesc;
|
|
fcinfo = current_call_data->fcinfo;
|
|
rsi = (ReturnSetInfo *) fcinfo->resultinfo;
|
|
|
|
if (!prodesc->fn_retisset)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_SYNTAX_ERROR),
|
|
errmsg("cannot use return_next in a non-SETOF function")));
|
|
|
|
if (prodesc->fn_retistuple &&
|
|
!(SvOK(sv) && SvTYPE(sv) == SVt_RV && SvTYPE(SvRV(sv)) == SVt_PVHV))
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_DATATYPE_MISMATCH),
|
|
errmsg("SETOF-composite-returning PL/Perl function "
|
|
"must call return_next with reference to hash")));
|
|
|
|
if (!current_call_data->ret_tdesc)
|
|
{
|
|
TupleDesc tupdesc;
|
|
|
|
Assert(!current_call_data->tuple_store);
|
|
Assert(!current_call_data->attinmeta);
|
|
|
|
/*
|
|
* This is the first call to return_next in the current PL/Perl
|
|
* function call, so memoize some lookups
|
|
*/
|
|
if (prodesc->fn_retistuple)
|
|
(void) get_call_result_type(fcinfo, NULL, &tupdesc);
|
|
else
|
|
tupdesc = rsi->expectedDesc;
|
|
|
|
/*
|
|
* Make sure the tuple_store and ret_tdesc are sufficiently
|
|
* long-lived.
|
|
*/
|
|
old_cxt = MemoryContextSwitchTo(rsi->econtext->ecxt_per_query_memory);
|
|
|
|
current_call_data->ret_tdesc = CreateTupleDescCopy(tupdesc);
|
|
current_call_data->tuple_store =
|
|
tuplestore_begin_heap(rsi->allowedModes & SFRM_Materialize_Random,
|
|
false, work_mem);
|
|
if (prodesc->fn_retistuple)
|
|
{
|
|
current_call_data->attinmeta =
|
|
TupleDescGetAttInMetadata(current_call_data->ret_tdesc);
|
|
}
|
|
|
|
MemoryContextSwitchTo(old_cxt);
|
|
}
|
|
|
|
/*
|
|
* Producing the tuple we want to return requires making plenty of
|
|
* palloc() allocations that are not cleaned up. Since this function can
|
|
* be called many times before the current memory context is reset, we
|
|
* need to do those allocations in a temporary context.
|
|
*/
|
|
if (!current_call_data->tmp_cxt)
|
|
{
|
|
current_call_data->tmp_cxt =
|
|
AllocSetContextCreate(rsi->econtext->ecxt_per_tuple_memory,
|
|
"PL/Perl return_next temporary cxt",
|
|
ALLOCSET_DEFAULT_MINSIZE,
|
|
ALLOCSET_DEFAULT_INITSIZE,
|
|
ALLOCSET_DEFAULT_MAXSIZE);
|
|
}
|
|
|
|
old_cxt = MemoryContextSwitchTo(current_call_data->tmp_cxt);
|
|
|
|
if (prodesc->fn_retistuple)
|
|
{
|
|
HeapTuple tuple;
|
|
|
|
tuple = plperl_build_tuple_result((HV *) SvRV(sv),
|
|
current_call_data->attinmeta);
|
|
tuplestore_puttuple(current_call_data->tuple_store, tuple);
|
|
}
|
|
else
|
|
{
|
|
Datum ret;
|
|
bool isNull;
|
|
|
|
if (SvOK(sv))
|
|
{
|
|
if (prodesc->fn_retisarray && SvROK(sv) &&
|
|
SvTYPE(SvRV(sv)) == SVt_PVAV)
|
|
{
|
|
sv = plperl_convert_to_pg_array(sv);
|
|
}
|
|
|
|
ret = InputFunctionCall(&prodesc->result_in_func,
|
|
sv2text_mbverified(sv),
|
|
prodesc->result_typioparam, -1);
|
|
isNull = false;
|
|
}
|
|
else
|
|
{
|
|
ret = InputFunctionCall(&prodesc->result_in_func, NULL,
|
|
prodesc->result_typioparam, -1);
|
|
isNull = true;
|
|
}
|
|
|
|
tuplestore_putvalues(current_call_data->tuple_store,
|
|
current_call_data->ret_tdesc,
|
|
&ret, &isNull);
|
|
}
|
|
|
|
MemoryContextSwitchTo(old_cxt);
|
|
MemoryContextReset(current_call_data->tmp_cxt);
|
|
}
|
|
|
|
|
|
SV *
|
|
plperl_spi_query(char *query)
|
|
{
|
|
SV *cursor;
|
|
|
|
/*
|
|
* Execute the query inside a sub-transaction, so we can cope with errors
|
|
* sanely
|
|
*/
|
|
MemoryContext oldcontext = CurrentMemoryContext;
|
|
ResourceOwner oldowner = CurrentResourceOwner;
|
|
|
|
check_spi_usage_allowed();
|
|
|
|
BeginInternalSubTransaction(NULL);
|
|
/* Want to run inside function's memory context */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
|
|
PG_TRY();
|
|
{
|
|
void *plan;
|
|
Portal portal;
|
|
|
|
/* Create a cursor for the query */
|
|
plan = SPI_prepare(query, 0, NULL);
|
|
if (plan == NULL)
|
|
elog(ERROR, "SPI_prepare() failed:%s",
|
|
SPI_result_code_string(SPI_result));
|
|
|
|
portal = SPI_cursor_open(NULL, plan, NULL, NULL, false);
|
|
SPI_freeplan(plan);
|
|
if (portal == NULL)
|
|
elog(ERROR, "SPI_cursor_open() failed:%s",
|
|
SPI_result_code_string(SPI_result));
|
|
cursor = newSVstring(portal->name);
|
|
|
|
/* Commit the inner transaction, return to outer xact context */
|
|
ReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/*
|
|
* AtEOSubXact_SPI() should not have popped any SPI context, but just
|
|
* in case it did, make sure we remain connected.
|
|
*/
|
|
SPI_restore_connection();
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
ErrorData *edata;
|
|
|
|
/* Save error info */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
edata = CopyErrorData();
|
|
FlushErrorState();
|
|
|
|
/* Abort the inner transaction */
|
|
RollbackAndReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/*
|
|
* If AtEOSubXact_SPI() popped any SPI context of the subxact, it will
|
|
* have left us in a disconnected state. We need this hack to return
|
|
* to connected state.
|
|
*/
|
|
SPI_restore_connection();
|
|
|
|
/* Punt the error to Perl */
|
|
croak("%s", edata->message);
|
|
|
|
/* Can't get here, but keep compiler quiet */
|
|
return NULL;
|
|
}
|
|
PG_END_TRY();
|
|
|
|
return cursor;
|
|
}
|
|
|
|
|
|
SV *
|
|
plperl_spi_fetchrow(char *cursor)
|
|
{
|
|
SV *row;
|
|
|
|
/*
|
|
* Execute the FETCH inside a sub-transaction, so we can cope with errors
|
|
* sanely
|
|
*/
|
|
MemoryContext oldcontext = CurrentMemoryContext;
|
|
ResourceOwner oldowner = CurrentResourceOwner;
|
|
|
|
check_spi_usage_allowed();
|
|
|
|
BeginInternalSubTransaction(NULL);
|
|
/* Want to run inside function's memory context */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
|
|
PG_TRY();
|
|
{
|
|
Portal p = SPI_cursor_find(cursor);
|
|
|
|
if (!p)
|
|
{
|
|
row = &PL_sv_undef;
|
|
}
|
|
else
|
|
{
|
|
SPI_cursor_fetch(p, true, 1);
|
|
if (SPI_processed == 0)
|
|
{
|
|
SPI_cursor_close(p);
|
|
row = &PL_sv_undef;
|
|
}
|
|
else
|
|
{
|
|
row = plperl_hash_from_tuple(SPI_tuptable->vals[0],
|
|
SPI_tuptable->tupdesc);
|
|
}
|
|
SPI_freetuptable(SPI_tuptable);
|
|
}
|
|
|
|
/* Commit the inner transaction, return to outer xact context */
|
|
ReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/*
|
|
* AtEOSubXact_SPI() should not have popped any SPI context, but just
|
|
* in case it did, make sure we remain connected.
|
|
*/
|
|
SPI_restore_connection();
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
ErrorData *edata;
|
|
|
|
/* Save error info */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
edata = CopyErrorData();
|
|
FlushErrorState();
|
|
|
|
/* Abort the inner transaction */
|
|
RollbackAndReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/*
|
|
* If AtEOSubXact_SPI() popped any SPI context of the subxact, it will
|
|
* have left us in a disconnected state. We need this hack to return
|
|
* to connected state.
|
|
*/
|
|
SPI_restore_connection();
|
|
|
|
/* Punt the error to Perl */
|
|
croak("%s", edata->message);
|
|
|
|
/* Can't get here, but keep compiler quiet */
|
|
return NULL;
|
|
}
|
|
PG_END_TRY();
|
|
|
|
return row;
|
|
}
|
|
|
|
void
|
|
plperl_spi_cursor_close(char *cursor)
|
|
{
|
|
Portal p;
|
|
|
|
check_spi_usage_allowed();
|
|
|
|
p = SPI_cursor_find(cursor);
|
|
|
|
if (p)
|
|
SPI_cursor_close(p);
|
|
}
|
|
|
|
SV *
|
|
plperl_spi_prepare(char *query, int argc, SV **argv)
|
|
{
|
|
plperl_query_desc *qdesc;
|
|
plperl_query_entry *hash_entry;
|
|
bool found;
|
|
void *plan;
|
|
int i;
|
|
|
|
MemoryContext oldcontext = CurrentMemoryContext;
|
|
ResourceOwner oldowner = CurrentResourceOwner;
|
|
|
|
check_spi_usage_allowed();
|
|
|
|
BeginInternalSubTransaction(NULL);
|
|
MemoryContextSwitchTo(oldcontext);
|
|
|
|
/************************************************************
|
|
* Allocate the new querydesc structure
|
|
************************************************************/
|
|
qdesc = (plperl_query_desc *) malloc(sizeof(plperl_query_desc));
|
|
MemSet(qdesc, 0, sizeof(plperl_query_desc));
|
|
snprintf(qdesc->qname, sizeof(qdesc->qname), "%p", qdesc);
|
|
qdesc->nargs = argc;
|
|
qdesc->argtypes = (Oid *) malloc(argc * sizeof(Oid));
|
|
qdesc->arginfuncs = (FmgrInfo *) malloc(argc * sizeof(FmgrInfo));
|
|
qdesc->argtypioparams = (Oid *) malloc(argc * sizeof(Oid));
|
|
|
|
PG_TRY();
|
|
{
|
|
/************************************************************
|
|
* Resolve argument type names and then look them up by oid
|
|
* in the system cache, and remember the required information
|
|
* for input conversion.
|
|
************************************************************/
|
|
for (i = 0; i < argc; i++)
|
|
{
|
|
Oid typId,
|
|
typInput,
|
|
typIOParam;
|
|
int32 typmod;
|
|
|
|
parseTypeString(SvPV_nolen(argv[i]), &typId, &typmod);
|
|
|
|
getTypeInputInfo(typId, &typInput, &typIOParam);
|
|
|
|
qdesc->argtypes[i] = typId;
|
|
perm_fmgr_info(typInput, &(qdesc->arginfuncs[i]));
|
|
qdesc->argtypioparams[i] = typIOParam;
|
|
}
|
|
|
|
/************************************************************
|
|
* Prepare the plan and check for errors
|
|
************************************************************/
|
|
plan = SPI_prepare(query, argc, qdesc->argtypes);
|
|
|
|
if (plan == NULL)
|
|
elog(ERROR, "SPI_prepare() failed:%s",
|
|
SPI_result_code_string(SPI_result));
|
|
|
|
/************************************************************
|
|
* Save the plan into permanent memory (right now it's in the
|
|
* SPI procCxt, which will go away at function end).
|
|
************************************************************/
|
|
qdesc->plan = SPI_saveplan(plan);
|
|
if (qdesc->plan == NULL)
|
|
elog(ERROR, "SPI_saveplan() failed: %s",
|
|
SPI_result_code_string(SPI_result));
|
|
|
|
/* Release the procCxt copy to avoid within-function memory leak */
|
|
SPI_freeplan(plan);
|
|
|
|
/* Commit the inner transaction, return to outer xact context */
|
|
ReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/*
|
|
* AtEOSubXact_SPI() should not have popped any SPI context, but just
|
|
* in case it did, make sure we remain connected.
|
|
*/
|
|
SPI_restore_connection();
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
ErrorData *edata;
|
|
|
|
free(qdesc->argtypes);
|
|
free(qdesc->arginfuncs);
|
|
free(qdesc->argtypioparams);
|
|
free(qdesc);
|
|
|
|
/* Save error info */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
edata = CopyErrorData();
|
|
FlushErrorState();
|
|
|
|
/* Abort the inner transaction */
|
|
RollbackAndReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/*
|
|
* If AtEOSubXact_SPI() popped any SPI context of the subxact, it will
|
|
* have left us in a disconnected state. We need this hack to return
|
|
* to connected state.
|
|
*/
|
|
SPI_restore_connection();
|
|
|
|
/* Punt the error to Perl */
|
|
croak("%s", edata->message);
|
|
|
|
/* Can't get here, but keep compiler quiet */
|
|
return NULL;
|
|
}
|
|
PG_END_TRY();
|
|
|
|
/************************************************************
|
|
* Insert a hashtable entry for the plan and return
|
|
* the key to the caller.
|
|
************************************************************/
|
|
|
|
hash_entry = hash_search(plperl_query_hash, qdesc->qname,
|
|
HASH_ENTER, &found);
|
|
hash_entry->query_data = qdesc;
|
|
|
|
return newSVstring(qdesc->qname);
|
|
}
|
|
|
|
HV *
|
|
plperl_spi_exec_prepared(char *query, HV *attr, int argc, SV **argv)
|
|
{
|
|
HV *ret_hv;
|
|
SV **sv;
|
|
int i,
|
|
limit,
|
|
spi_rv;
|
|
char *nulls;
|
|
Datum *argvalues;
|
|
plperl_query_desc *qdesc;
|
|
plperl_query_entry *hash_entry;
|
|
|
|
/*
|
|
* Execute the query inside a sub-transaction, so we can cope with errors
|
|
* sanely
|
|
*/
|
|
MemoryContext oldcontext = CurrentMemoryContext;
|
|
ResourceOwner oldowner = CurrentResourceOwner;
|
|
|
|
check_spi_usage_allowed();
|
|
|
|
BeginInternalSubTransaction(NULL);
|
|
/* Want to run inside function's memory context */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
|
|
PG_TRY();
|
|
{
|
|
/************************************************************
|
|
* Fetch the saved plan descriptor, see if it's o.k.
|
|
************************************************************/
|
|
|
|
hash_entry = hash_search(plperl_query_hash, query,
|
|
HASH_FIND, NULL);
|
|
if (hash_entry == NULL)
|
|
elog(ERROR, "spi_exec_prepared: Invalid prepared query passed");
|
|
|
|
qdesc = hash_entry->query_data;
|
|
|
|
if (qdesc == NULL)
|
|
elog(ERROR, "spi_exec_prepared: panic - plperl_query_hash value vanished");
|
|
|
|
if (qdesc->nargs != argc)
|
|
elog(ERROR, "spi_exec_prepared: expected %d argument(s), %d passed",
|
|
qdesc->nargs, argc);
|
|
|
|
/************************************************************
|
|
* Parse eventual attributes
|
|
************************************************************/
|
|
limit = 0;
|
|
if (attr != NULL)
|
|
{
|
|
sv = hv_fetch_string(attr, "limit");
|
|
if (*sv && SvIOK(*sv))
|
|
limit = SvIV(*sv);
|
|
}
|
|
/************************************************************
|
|
* Set up arguments
|
|
************************************************************/
|
|
if (argc > 0)
|
|
{
|
|
nulls = (char *) palloc(argc);
|
|
argvalues = (Datum *) palloc(argc * sizeof(Datum));
|
|
}
|
|
else
|
|
{
|
|
nulls = NULL;
|
|
argvalues = NULL;
|
|
}
|
|
|
|
for (i = 0; i < argc; i++)
|
|
{
|
|
if (SvOK(argv[i]))
|
|
{
|
|
argvalues[i] = InputFunctionCall(&qdesc->arginfuncs[i],
|
|
sv2text_mbverified(argv[i]),
|
|
qdesc->argtypioparams[i],
|
|
-1);
|
|
nulls[i] = ' ';
|
|
}
|
|
else
|
|
{
|
|
argvalues[i] = InputFunctionCall(&qdesc->arginfuncs[i],
|
|
NULL,
|
|
qdesc->argtypioparams[i],
|
|
-1);
|
|
nulls[i] = 'n';
|
|
}
|
|
}
|
|
|
|
/************************************************************
|
|
* go
|
|
************************************************************/
|
|
spi_rv = SPI_execute_plan(qdesc->plan, argvalues, nulls,
|
|
current_call_data->prodesc->fn_readonly, limit);
|
|
ret_hv = plperl_spi_execute_fetch_result(SPI_tuptable, SPI_processed,
|
|
spi_rv);
|
|
if (argc > 0)
|
|
{
|
|
pfree(argvalues);
|
|
pfree(nulls);
|
|
}
|
|
|
|
/* Commit the inner transaction, return to outer xact context */
|
|
ReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/*
|
|
* AtEOSubXact_SPI() should not have popped any SPI context, but just
|
|
* in case it did, make sure we remain connected.
|
|
*/
|
|
SPI_restore_connection();
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
ErrorData *edata;
|
|
|
|
/* Save error info */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
edata = CopyErrorData();
|
|
FlushErrorState();
|
|
|
|
/* Abort the inner transaction */
|
|
RollbackAndReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/*
|
|
* If AtEOSubXact_SPI() popped any SPI context of the subxact, it will
|
|
* have left us in a disconnected state. We need this hack to return
|
|
* to connected state.
|
|
*/
|
|
SPI_restore_connection();
|
|
|
|
/* Punt the error to Perl */
|
|
croak("%s", edata->message);
|
|
|
|
/* Can't get here, but keep compiler quiet */
|
|
return NULL;
|
|
}
|
|
PG_END_TRY();
|
|
|
|
return ret_hv;
|
|
}
|
|
|
|
SV *
|
|
plperl_spi_query_prepared(char *query, int argc, SV **argv)
|
|
{
|
|
int i;
|
|
char *nulls;
|
|
Datum *argvalues;
|
|
plperl_query_desc *qdesc;
|
|
plperl_query_entry *hash_entry;
|
|
SV *cursor;
|
|
Portal portal = NULL;
|
|
|
|
/*
|
|
* Execute the query inside a sub-transaction, so we can cope with errors
|
|
* sanely
|
|
*/
|
|
MemoryContext oldcontext = CurrentMemoryContext;
|
|
ResourceOwner oldowner = CurrentResourceOwner;
|
|
|
|
check_spi_usage_allowed();
|
|
|
|
BeginInternalSubTransaction(NULL);
|
|
/* Want to run inside function's memory context */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
|
|
PG_TRY();
|
|
{
|
|
/************************************************************
|
|
* Fetch the saved plan descriptor, see if it's o.k.
|
|
************************************************************/
|
|
hash_entry = hash_search(plperl_query_hash, query,
|
|
HASH_FIND, NULL);
|
|
if (hash_entry == NULL)
|
|
elog(ERROR, "spi_exec_prepared: Invalid prepared query passed");
|
|
|
|
qdesc = hash_entry->query_data;
|
|
|
|
if (qdesc == NULL)
|
|
elog(ERROR, "spi_query_prepared: panic - plperl_query_hash value vanished");
|
|
|
|
if (qdesc->nargs != argc)
|
|
elog(ERROR, "spi_query_prepared: expected %d argument(s), %d passed",
|
|
qdesc->nargs, argc);
|
|
|
|
/************************************************************
|
|
* Set up arguments
|
|
************************************************************/
|
|
if (argc > 0)
|
|
{
|
|
nulls = (char *) palloc(argc);
|
|
argvalues = (Datum *) palloc(argc * sizeof(Datum));
|
|
}
|
|
else
|
|
{
|
|
nulls = NULL;
|
|
argvalues = NULL;
|
|
}
|
|
|
|
for (i = 0; i < argc; i++)
|
|
{
|
|
if (SvOK(argv[i]))
|
|
{
|
|
argvalues[i] = InputFunctionCall(&qdesc->arginfuncs[i],
|
|
sv2text_mbverified(argv[i]),
|
|
qdesc->argtypioparams[i],
|
|
-1);
|
|
nulls[i] = ' ';
|
|
}
|
|
else
|
|
{
|
|
argvalues[i] = InputFunctionCall(&qdesc->arginfuncs[i],
|
|
NULL,
|
|
qdesc->argtypioparams[i],
|
|
-1);
|
|
nulls[i] = 'n';
|
|
}
|
|
}
|
|
|
|
/************************************************************
|
|
* go
|
|
************************************************************/
|
|
portal = SPI_cursor_open(NULL, qdesc->plan, argvalues, nulls,
|
|
current_call_data->prodesc->fn_readonly);
|
|
if (argc > 0)
|
|
{
|
|
pfree(argvalues);
|
|
pfree(nulls);
|
|
}
|
|
if (portal == NULL)
|
|
elog(ERROR, "SPI_cursor_open() failed:%s",
|
|
SPI_result_code_string(SPI_result));
|
|
|
|
cursor = newSVstring(portal->name);
|
|
|
|
/* Commit the inner transaction, return to outer xact context */
|
|
ReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/*
|
|
* AtEOSubXact_SPI() should not have popped any SPI context, but just
|
|
* in case it did, make sure we remain connected.
|
|
*/
|
|
SPI_restore_connection();
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
ErrorData *edata;
|
|
|
|
/* Save error info */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
edata = CopyErrorData();
|
|
FlushErrorState();
|
|
|
|
/* Abort the inner transaction */
|
|
RollbackAndReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/*
|
|
* If AtEOSubXact_SPI() popped any SPI context of the subxact, it will
|
|
* have left us in a disconnected state. We need this hack to return
|
|
* to connected state.
|
|
*/
|
|
SPI_restore_connection();
|
|
|
|
/* Punt the error to Perl */
|
|
croak("%s", edata->message);
|
|
|
|
/* Can't get here, but keep compiler quiet */
|
|
return NULL;
|
|
}
|
|
PG_END_TRY();
|
|
|
|
return cursor;
|
|
}
|
|
|
|
void
|
|
plperl_spi_freeplan(char *query)
|
|
{
|
|
void *plan;
|
|
plperl_query_desc *qdesc;
|
|
plperl_query_entry *hash_entry;
|
|
|
|
check_spi_usage_allowed();
|
|
|
|
hash_entry = hash_search(plperl_query_hash, query,
|
|
HASH_FIND, NULL);
|
|
if (hash_entry == NULL)
|
|
elog(ERROR, "spi_exec_prepared: Invalid prepared query passed");
|
|
|
|
qdesc = hash_entry->query_data;
|
|
|
|
if (qdesc == NULL)
|
|
elog(ERROR, "spi_exec_freeplan: panic - plperl_query_hash value vanished");
|
|
|
|
/*
|
|
* free all memory before SPI_freeplan, so if it dies, nothing will be
|
|
* left over
|
|
*/
|
|
hash_search(plperl_query_hash, query,
|
|
HASH_REMOVE, NULL);
|
|
|
|
plan = qdesc->plan;
|
|
free(qdesc->argtypes);
|
|
free(qdesc->arginfuncs);
|
|
free(qdesc->argtypioparams);
|
|
free(qdesc);
|
|
|
|
SPI_freeplan(plan);
|
|
}
|
|
|
|
/*
|
|
* Create a new SV from a string assumed to be in the current database's
|
|
* encoding.
|
|
*/
|
|
static SV *
|
|
newSVstring(const char *str)
|
|
{
|
|
SV *sv;
|
|
|
|
sv = newSVpv(str, 0);
|
|
#if PERL_BCDVERSION >= 0x5006000L
|
|
if (GetDatabaseEncoding() == PG_UTF8)
|
|
SvUTF8_on(sv);
|
|
#endif
|
|
return sv;
|
|
}
|
|
|
|
/*
|
|
* Store an SV into a hash table under a key that is a string assumed to be
|
|
* in the current database's encoding.
|
|
*/
|
|
static SV **
|
|
hv_store_string(HV *hv, const char *key, SV *val)
|
|
{
|
|
int32 klen = strlen(key);
|
|
|
|
/*
|
|
* This seems nowhere documented, but under Perl 5.8.0 and up, hv_store()
|
|
* recognizes a negative klen parameter as meaning a UTF-8 encoded key. It
|
|
* does not appear that hashes track UTF-8-ness of keys at all in Perl
|
|
* 5.6.
|
|
*/
|
|
#if PERL_BCDVERSION >= 0x5008000L
|
|
if (GetDatabaseEncoding() == PG_UTF8)
|
|
klen = -klen;
|
|
#endif
|
|
return hv_store(hv, key, klen, val, 0);
|
|
}
|
|
|
|
/*
|
|
* Fetch an SV from a hash table under a key that is a string assumed to be
|
|
* in the current database's encoding.
|
|
*/
|
|
static SV **
|
|
hv_fetch_string(HV *hv, const char *key)
|
|
{
|
|
int32 klen = strlen(key);
|
|
|
|
/* See notes in hv_store_string */
|
|
#if PERL_BCDVERSION >= 0x5008000L
|
|
if (GetDatabaseEncoding() == PG_UTF8)
|
|
klen = -klen;
|
|
#endif
|
|
return hv_fetch(hv, key, klen, 0);
|
|
}
|
|
|
|
/*
|
|
* Provide function name for PL/Perl execution errors
|
|
*/
|
|
static void
|
|
plperl_exec_callback(void *arg)
|
|
{
|
|
char *procname = (char *) arg;
|
|
if (procname)
|
|
errcontext("PL/Perl function \"%s\"", procname);
|
|
}
|
|
|
|
/*
|
|
* Provide function name for PL/Perl compilation errors
|
|
*/
|
|
static void
|
|
plperl_compile_callback(void *arg)
|
|
{
|
|
char *procname = (char *) arg;
|
|
if (procname)
|
|
errcontext("compilation of PL/Perl function \"%s\"", procname);
|
|
}
|
|
|
|
/*
|
|
* Provide error context for the inline handler
|
|
*/
|
|
static void
|
|
plperl_inline_callback(void *arg)
|
|
{
|
|
errcontext("PL/Perl anonymous code block");
|
|
}
|