mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-09-08 09:29:20 +02:00
c07fbcf577
Allow conversion from perl to postgresql array in OUT parameters. Second, allow hash form output from procedures with one OUT argument. Pavel Stehule
2443 lines
62 KiB
C
2443 lines
62 KiB
C
/**********************************************************************
|
|
* plperl.c - perl as a procedural language for PostgreSQL
|
|
*
|
|
* $PostgreSQL: pgsql/src/pl/plperl/plperl.c,v 1.114 2006/08/11 19:42:35 momjian 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 "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 "utils/lsyscache.h"
|
|
#include "utils/memutils.h"
|
|
#include "utils/typcache.h"
|
|
|
|
/* define this before the perl headers get a chance to mangle DLLIMPORT */
|
|
extern DLLIMPORT bool check_function_bodies;
|
|
|
|
/* perl stuff */
|
|
#include "plperl.h"
|
|
|
|
PG_MODULE_MAGIC;
|
|
|
|
/**********************************************************************
|
|
* The information we cache about loaded procedures
|
|
**********************************************************************/
|
|
typedef struct plperl_proc_desc
|
|
{
|
|
char *proname;
|
|
TransactionId fn_xmin;
|
|
CommandId fn_cmin;
|
|
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;
|
|
int num_out_args; /* number of out arguments */
|
|
FmgrInfo arg_out_func[FUNC_MAX_ARGS];
|
|
bool arg_is_rowtype[FUNC_MAX_ARGS];
|
|
SV *reference;
|
|
} plperl_proc_desc;
|
|
|
|
/*
|
|
* 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[sizeof(long) * 2 + 1];
|
|
void *plan;
|
|
int nargs;
|
|
Oid *argtypes;
|
|
FmgrInfo *arginfuncs;
|
|
Oid *argtypioparams;
|
|
} plperl_query_desc;
|
|
|
|
/**********************************************************************
|
|
* Global data
|
|
**********************************************************************/
|
|
static bool plperl_safe_init_done = false;
|
|
static PerlInterpreter *plperl_interp = NULL;
|
|
static HV *plperl_proc_hash = NULL;
|
|
static HV *plperl_query_hash = NULL;
|
|
|
|
static bool plperl_use_strict = 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_validator(PG_FUNCTION_ARGS);
|
|
void _PG_init(void);
|
|
|
|
static void plperl_init_interp(void);
|
|
|
|
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 HV *plperl_spi_execute_fetch_result(SPITupleTable *, int, int);
|
|
|
|
static SV *plperl_convert_to_pg_array(SV *src);
|
|
static SV *plperl_transform_result(plperl_proc_desc *prodesc, SV *result);
|
|
|
|
/*
|
|
* 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;
|
|
|
|
if (inited)
|
|
return;
|
|
|
|
DefineCustomBoolVariable("plperl.use_strict",
|
|
"If true, will compile trusted and untrusted perl code in strict mode",
|
|
NULL,
|
|
&plperl_use_strict,
|
|
PGC_USERSET,
|
|
NULL, NULL);
|
|
|
|
EmitWarningsOnPlaceholders("plperl");
|
|
|
|
plperl_init_interp();
|
|
|
|
inited = true;
|
|
}
|
|
|
|
/* Each of these macros must represent a single string literal */
|
|
|
|
#define PERLBOOT \
|
|
"SPI::bootstrap(); use vars qw(%_SHARED);" \
|
|
"sub ::plperl_warn { my $msg = shift; " \
|
|
" $msg =~ s/\\(eval \\d+\\) //g; &elog(&NOTICE, $msg); } " \
|
|
"$SIG{__WARN__} = \\&::plperl_warn; " \
|
|
"sub ::plperl_die { my $msg = shift; " \
|
|
" $msg =~ s/\\(eval \\d+\\) //g; die $msg; } " \
|
|
"$SIG{__DIE__} = \\&::plperl_die; " \
|
|
"sub ::mkunsafefunc {" \
|
|
" my $ret = eval(qq[ sub { $_[0] $_[1] } ]); " \
|
|
" $@ =~ s/\\(eval \\d+\\) //g if $@; return $ret; }" \
|
|
"use strict; " \
|
|
"sub ::mk_strict_unsafefunc {" \
|
|
" my $ret = eval(qq[ sub { use strict; $_[0] $_[1] } ]); " \
|
|
" $@ =~ s/\\(eval \\d+\\) //g if $@; return $ret; } " \
|
|
"sub ::_plperl_to_pg_array {" \
|
|
" my $arg = shift; ref $arg eq 'ARRAY' || return $arg; " \
|
|
" my $res = ''; my $first = 1; " \
|
|
" foreach my $elem (@$arg) " \
|
|
" { " \
|
|
" $res .= ', ' unless $first; $first = undef; " \
|
|
" if (ref $elem) " \
|
|
" { " \
|
|
" $res .= _plperl_to_pg_array($elem); " \
|
|
" } " \
|
|
" elsif (defined($elem)) " \
|
|
" { " \
|
|
" my $str = qq($elem); " \
|
|
" $str =~ s/([\"\\\\])/\\\\$1/g; " \
|
|
" $res .= qq(\"$str\"); " \
|
|
" } " \
|
|
" else " \
|
|
" { "\
|
|
" $res .= 'NULL' ; " \
|
|
" } "\
|
|
" } " \
|
|
" return qq({$res}); " \
|
|
"} "
|
|
|
|
#define SAFE_MODULE \
|
|
"require Safe; $Safe::VERSION"
|
|
|
|
#define SAFE_OK \
|
|
"use vars qw($PLContainer); $PLContainer = new Safe('PLPerl');" \
|
|
"$PLContainer->permit_only(':default');" \
|
|
"$PLContainer->permit(qw[:base_math !:base_io sort time]);" \
|
|
"$PLContainer->share(qw[&elog &spi_exec_query &return_next " \
|
|
"&spi_query &spi_fetchrow &spi_cursor_close " \
|
|
"&spi_prepare &spi_exec_prepared &spi_query_prepared &spi_freeplan " \
|
|
"&_plperl_to_pg_array " \
|
|
"&DEBUG &LOG &INFO &NOTICE &WARNING &ERROR %_SHARED ]);" \
|
|
"sub ::mksafefunc {" \
|
|
" my $ret = $PLContainer->reval(qq[sub { $_[0] $_[1] }]); " \
|
|
" $@ =~ s/\\(eval \\d+\\) //g if $@; return $ret; }" \
|
|
"$PLContainer->permit('require'); $PLContainer->reval('use strict;');" \
|
|
"$PLContainer->deny('require');" \
|
|
"sub ::mk_strict_safefunc {" \
|
|
" my $ret = $PLContainer->reval(qq[sub { BEGIN { strict->import(); } $_[0] $_[1] }]); " \
|
|
" $@ =~ s/\\(eval \\d+\\) //g if $@; return $ret; }"
|
|
|
|
#define SAFE_BAD \
|
|
"use vars qw($PLContainer); $PLContainer = new Safe('PLPerl');" \
|
|
"$PLContainer->permit_only(':default');" \
|
|
"$PLContainer->share(qw[&elog &ERROR ]);" \
|
|
"sub ::mksafefunc { return $PLContainer->reval(qq[sub { " \
|
|
" elog(ERROR,'trusted Perl functions disabled - " \
|
|
" please upgrade Perl Safe module to version 2.09 or later');}]); }" \
|
|
"sub ::mk_strict_safefunc { return $PLContainer->reval(qq[sub { " \
|
|
" elog(ERROR,'trusted Perl functions disabled - " \
|
|
" please upgrade Perl Safe module to version 2.09 or later');}]); }"
|
|
|
|
|
|
static void
|
|
plperl_init_interp(void)
|
|
{
|
|
static char *embedding[3] = {
|
|
"", "-e", PERLBOOT
|
|
};
|
|
|
|
#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
|
|
|
|
plperl_interp = perl_alloc();
|
|
if (!plperl_interp)
|
|
elog(ERROR, "could not allocate Perl interpreter");
|
|
|
|
perl_construct(plperl_interp);
|
|
perl_parse(plperl_interp, plperl_init_shared_libs, 3, embedding, NULL);
|
|
perl_run(plperl_interp);
|
|
|
|
plperl_proc_hash = newHV();
|
|
plperl_query_hash = newHV();
|
|
|
|
#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
|
|
|
|
}
|
|
|
|
|
|
static void
|
|
plperl_safe_init(void)
|
|
{
|
|
SV *res;
|
|
double safe_version;
|
|
|
|
res = eval_pv(SAFE_MODULE, FALSE); /* TRUE = croak if failure */
|
|
|
|
safe_version = SvNV(res);
|
|
|
|
/*
|
|
* We actually want to reject safe_version < 2.09, but it's risky to
|
|
* assume that floating-point comparisons are exact, so use a slightly
|
|
* smaller comparison value.
|
|
*/
|
|
if (safe_version < 2.0899)
|
|
{
|
|
/* not safe, so disallow all trusted funcs */
|
|
eval_pv(SAFE_BAD, FALSE);
|
|
}
|
|
else
|
|
{
|
|
eval_pv(SAFE_OK, FALSE);
|
|
}
|
|
|
|
plperl_safe_init_done = true;
|
|
}
|
|
|
|
/*
|
|
* 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 value is ref on array do to pg string array conversion */
|
|
if (SvTYPE(val) == SVt_RV &&
|
|
SvTYPE(SvRV(val)) == SVt_PVAV)
|
|
values[attn - 1] = SvPV(plperl_convert_to_pg_array(val), PL_na);
|
|
else if (SvOK(val) && SvTYPE(val) != SVt_NULL)
|
|
values[attn - 1] = SvPV(val, PL_na);
|
|
}
|
|
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 = call_pv("::_plperl_to_pg_array", G_SCALAR);
|
|
|
|
SPAGAIN;
|
|
|
|
if (count != 1)
|
|
elog(ERROR, "unexpected _plperl_to_pg_array 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();
|
|
|
|
tdata = (TriggerData *) fcinfo->context;
|
|
tupdesc = tdata->tg_relation->rd_att;
|
|
|
|
relid = DatumGetCString(
|
|
DirectFunctionCall1(oidout,
|
|
ObjectIdGetDatum(tdata->tg_relation->rd_id)
|
|
)
|
|
);
|
|
|
|
hv_store(hv, "name", 4, newSVpv(tdata->tg_trigger->tgname, 0), 0);
|
|
hv_store(hv, "relid", 5, newSVpv(relid, 0), 0);
|
|
|
|
if (TRIGGER_FIRED_BY_INSERT(tdata->tg_event))
|
|
{
|
|
event = "INSERT";
|
|
if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
|
|
hv_store(hv, "new", 3,
|
|
plperl_hash_from_tuple(tdata->tg_trigtuple, tupdesc),
|
|
0);
|
|
}
|
|
else if (TRIGGER_FIRED_BY_DELETE(tdata->tg_event))
|
|
{
|
|
event = "DELETE";
|
|
if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
|
|
hv_store(hv, "old", 3,
|
|
plperl_hash_from_tuple(tdata->tg_trigtuple, tupdesc),
|
|
0);
|
|
}
|
|
else if (TRIGGER_FIRED_BY_UPDATE(tdata->tg_event))
|
|
{
|
|
event = "UPDATE";
|
|
if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
|
|
{
|
|
hv_store(hv, "old", 3,
|
|
plperl_hash_from_tuple(tdata->tg_trigtuple, tupdesc),
|
|
0);
|
|
hv_store(hv, "new", 3,
|
|
plperl_hash_from_tuple(tdata->tg_newtuple, tupdesc),
|
|
0);
|
|
}
|
|
}
|
|
else
|
|
event = "UNKNOWN";
|
|
|
|
hv_store(hv, "event", 5, newSVpv(event, 0), 0);
|
|
hv_store(hv, "argc", 4, newSViv(tdata->tg_trigger->tgnargs), 0);
|
|
|
|
if (tdata->tg_trigger->tgnargs > 0)
|
|
{
|
|
AV *av = newAV();
|
|
|
|
for (i = 0; i < tdata->tg_trigger->tgnargs; i++)
|
|
av_push(av, newSVpv(tdata->tg_trigger->tgargs[i], 0));
|
|
hv_store(hv, "args", 4, newRV_noinc((SV *) av), 0);
|
|
}
|
|
|
|
hv_store(hv, "relname", 7,
|
|
newSVpv(SPI_getrelname(tdata->tg_relation), 0), 0);
|
|
|
|
hv_store(hv, "table_name", 10,
|
|
newSVpv(SPI_getrelname(tdata->tg_relation), 0), 0);
|
|
|
|
hv_store(hv, "table_schema", 12,
|
|
newSVpv(SPI_getnspname(tdata->tg_relation), 0), 0);
|
|
|
|
if (TRIGGER_FIRED_BEFORE(tdata->tg_event))
|
|
when = "BEFORE";
|
|
else if (TRIGGER_FIRED_AFTER(tdata->tg_event))
|
|
when = "AFTER";
|
|
else
|
|
when = "UNKNOWN";
|
|
hv_store(hv, "when", 4, newSVpv(when, 0), 0);
|
|
|
|
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(hv, "level", 5, newSVpv(level, 0), 0);
|
|
|
|
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(hvTD, "new", 3, FALSE);
|
|
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) && SvTYPE(val) != SVt_NULL)
|
|
{
|
|
modvalues[slotsused] = InputFunctionCall(&finfo,
|
|
SvPV(val, PL_na),
|
|
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;
|
|
}
|
|
|
|
|
|
/*
|
|
* This is the only externally-visible part of the plperl call interface.
|
|
* The Postgres function and trigger managers call it to execute a
|
|
* perl function.
|
|
*/
|
|
PG_FUNCTION_INFO_V1(plperl_call_handler);
|
|
|
|
Datum
|
|
plperl_call_handler(PG_FUNCTION_ARGS)
|
|
{
|
|
Datum retval;
|
|
plperl_call_data *save_call_data;
|
|
|
|
save_call_data = current_call_data;
|
|
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;
|
|
PG_RE_THROW();
|
|
}
|
|
PG_END_TRY();
|
|
|
|
current_call_data = save_call_data;
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
* This is the other externally visible function - it is called when CREATE
|
|
* FUNCTION is issued to validate the function being created/replaced.
|
|
*/
|
|
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;
|
|
bool istrigger = false;
|
|
|
|
/* 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 == 'p')
|
|
{
|
|
/* 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("plperl functions cannot return type %s",
|
|
format_type_be(proc->prorettype))));
|
|
}
|
|
|
|
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 an anonymous sub whose text is
|
|
* supplied in s, and returns a reference to the closure. */
|
|
|
|
static SV *
|
|
plperl_create_sub(char *s, bool trusted)
|
|
{
|
|
dSP;
|
|
SV *subref;
|
|
int count;
|
|
char *compile_sub;
|
|
|
|
if (trusted && !plperl_safe_init_done)
|
|
{
|
|
plperl_safe_init();
|
|
SPAGAIN;
|
|
}
|
|
|
|
ENTER;
|
|
SAVETMPS;
|
|
PUSHMARK(SP);
|
|
XPUSHs(sv_2mortal(newSVpv("our $_TD; local $_TD=$_[0]; shift;", 0)));
|
|
XPUSHs(sv_2mortal(newSVpv(s, 0)));
|
|
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?
|
|
*/
|
|
|
|
if (trusted && plperl_use_strict)
|
|
compile_sub = "::mk_strict_safefunc";
|
|
else if (plperl_use_strict)
|
|
compile_sub = "::mk_strict_unsafefunc";
|
|
else if (trusted)
|
|
compile_sub = "::mksafefunc";
|
|
else
|
|
compile_sub = "::mkunsafefunc";
|
|
|
|
count = perl_call_pv(compile_sub, G_SCALAR | G_EVAL | G_KEEPERR);
|
|
SPAGAIN;
|
|
|
|
if (count != 1)
|
|
{
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
elog(ERROR, "didn't get a return item from mksafefunc");
|
|
}
|
|
|
|
if (SvTRUE(ERRSV))
|
|
{
|
|
(void) POPs;
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_SYNTAX_ERROR),
|
|
errmsg("creation of Perl function failed: %s",
|
|
strip_trailing_ws(SvPV(ERRSV, PL_na)))));
|
|
}
|
|
|
|
/*
|
|
* need to make a deep copy of the return. it comes off the stack as a
|
|
* temporary.
|
|
*/
|
|
subref = newSVsv(POPs);
|
|
|
|
if (!SvROK(subref) || SvTYPE(SvRV(subref)) != SVt_PVCV)
|
|
{
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
|
|
/*
|
|
* subref is our responsibility because it is not mortal
|
|
*/
|
|
SvREFCNT_dec(subref);
|
|
elog(ERROR, "didn't get a code ref");
|
|
}
|
|
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
|
|
return subref;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* 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.
|
|
*
|
|
**********************************************************************/
|
|
|
|
EXTERN_C void boot_DynaLoader(pTHX_ CV *cv);
|
|
EXTERN_C void boot_SPI(pTHX_ CV *cv);
|
|
|
|
static void
|
|
plperl_init_shared_libs(pTHX)
|
|
{
|
|
char *file = __FILE__;
|
|
|
|
newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
|
|
newXS("SPI::bootstrap", boot_SPI, 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);
|
|
|
|
XPUSHs(&PL_sv_undef); /* no trigger data */
|
|
|
|
for (i = 0; i < desc->nargs; i++)
|
|
{
|
|
if (fcinfo->argnull[i])
|
|
XPUSHs(&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);
|
|
XPUSHs(sv_2mortal(hashref));
|
|
ReleaseTupleDesc(tupdesc);
|
|
}
|
|
else
|
|
{
|
|
char *tmp;
|
|
|
|
tmp = OutputFunctionCall(&(desc->arg_out_func[i]),
|
|
fcinfo->arg[i]);
|
|
sv = newSVpv(tmp, 0);
|
|
#if PERL_BCDVERSION >= 0x5006000L
|
|
if (GetDatabaseEncoding() == PG_UTF8)
|
|
SvUTF8_on(sv);
|
|
#endif
|
|
XPUSHs(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("error from Perl function: %s",
|
|
strip_trailing_ws(SvPV(ERRSV, PL_na)))));
|
|
}
|
|
|
|
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(newSVpv(tg_trigger->tgargs[i], 0)));
|
|
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("error from Perl trigger function: %s",
|
|
strip_trailing_ws(SvPV(ERRSV, PL_na)))));
|
|
}
|
|
|
|
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;
|
|
|
|
/*
|
|
* 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;
|
|
|
|
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")));
|
|
}
|
|
|
|
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.
|
|
*/
|
|
if (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 (SvTYPE(perlret) != SVt_NULL)
|
|
{
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_DATATYPE_MISMATCH),
|
|
errmsg("set-returning 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 (SvTYPE(perlret) == SVt_NULL)
|
|
{
|
|
/* 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 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 */
|
|
char *val;
|
|
|
|
perlret = plperl_transform_result(prodesc, perlret);
|
|
|
|
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;
|
|
}
|
|
|
|
val = SvPV(perlret, PL_na);
|
|
|
|
retval = InputFunctionCall(&prodesc->result_in_func, val,
|
|
prodesc->result_typioparam, -1);
|
|
}
|
|
|
|
if (array_ret == NULL)
|
|
SvREFCNT_dec(perlret);
|
|
|
|
current_call_data = NULL;
|
|
return retval;
|
|
}
|
|
|
|
|
|
static Datum
|
|
plperl_trigger_handler(PG_FUNCTION_ARGS)
|
|
{
|
|
plperl_proc_desc *prodesc;
|
|
SV *perlret;
|
|
Datum retval;
|
|
SV *svTD;
|
|
HV *hvTD;
|
|
|
|
/*
|
|
* 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;
|
|
|
|
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 && SvOK(perlret) && SvTYPE(perlret) != SVt_NULL))
|
|
{
|
|
/* 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
|
|
retval = (Datum) 0; /* can this happen? */
|
|
}
|
|
else
|
|
{
|
|
HeapTuple trv;
|
|
char *tmp;
|
|
|
|
tmp = SvPV(perlret, PL_na);
|
|
|
|
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 tuple in DELETE trigger")));
|
|
trv = NULL;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
|
|
errmsg("result of Perl trigger function must be undef, "
|
|
"\"SKIP\" or \"MODIFY\"")));
|
|
trv = NULL;
|
|
}
|
|
retval = PointerGetDatum(trv);
|
|
}
|
|
|
|
SvREFCNT_dec(svTD);
|
|
if (perlret)
|
|
SvREFCNT_dec(perlret);
|
|
|
|
current_call_data = NULL;
|
|
return retval;
|
|
}
|
|
|
|
|
|
static plperl_proc_desc *
|
|
compile_plperl_function(Oid fn_oid, bool is_trigger)
|
|
{
|
|
HeapTuple procTup;
|
|
Form_pg_proc procStruct;
|
|
char internal_proname[64];
|
|
int proname_len;
|
|
plperl_proc_desc *prodesc = NULL;
|
|
SV **svp;
|
|
|
|
/* 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);
|
|
|
|
/************************************************************
|
|
* 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);
|
|
|
|
proname_len = strlen(internal_proname);
|
|
|
|
/************************************************************
|
|
* Lookup the internal proc name in the hashtable
|
|
************************************************************/
|
|
svp = hv_fetch(plperl_proc_hash, internal_proname, proname_len, FALSE);
|
|
if (svp)
|
|
{
|
|
bool uptodate;
|
|
|
|
prodesc = INT2PTR( plperl_proc_desc *, SvUV(*svp));
|
|
|
|
/************************************************************
|
|
* 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) &&
|
|
prodesc->fn_cmin == HeapTupleHeaderGetCmin(procTup->t_data));
|
|
|
|
if (!uptodate)
|
|
{
|
|
/* need we delete old entry? */
|
|
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;
|
|
int i;
|
|
int numargs;
|
|
Oid *argtypes;
|
|
char **argnames;
|
|
char *argmodes;
|
|
|
|
|
|
/************************************************************
|
|
* 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(internal_proname);
|
|
prodesc->fn_xmin = HeapTupleHeaderGetXmin(procTup->t_data);
|
|
prodesc->fn_cmin = HeapTupleHeaderGetCmin(procTup->t_data);
|
|
|
|
/* Remember if function is STABLE/IMMUTABLE */
|
|
prodesc->fn_readonly =
|
|
(procStruct->provolatile != PROVOLATILE_VOLATILE);
|
|
|
|
|
|
/* Disallow pseudotypes in arguments (either IN or OUT) */
|
|
/* Count number of out arguments */
|
|
numargs = get_func_arg_info(procTup,
|
|
&argtypes, &argnames, &argmodes);
|
|
for (i = 0; i < numargs; i++)
|
|
{
|
|
if (get_typtype(argtypes[i]) == 'p')
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("plperl functions cannot take type %s",
|
|
format_type_be(argtypes[i]))));
|
|
|
|
if (argmodes && argmodes[i] == PROARGMODE_OUT)
|
|
prodesc->num_out_args++;
|
|
|
|
}
|
|
|
|
|
|
/************************************************************
|
|
* 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 == 'p')
|
|
{
|
|
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 may only be called "
|
|
"as triggers")));
|
|
}
|
|
else
|
|
{
|
|
free(prodesc->proname);
|
|
free(prodesc);
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("plperl functions cannot return type %s",
|
|
format_type_be(procStruct->prorettype))));
|
|
}
|
|
}
|
|
|
|
prodesc->result_oid = procStruct->prorettype;
|
|
prodesc->fn_retisset = procStruct->proretset;
|
|
prodesc->fn_retistuple = (typeStruct->typtype == 'c' ||
|
|
procStruct->prorettype == RECORDOID);
|
|
|
|
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 == 'p')
|
|
{
|
|
free(prodesc->proname);
|
|
free(prodesc);
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("plperl functions cannot take type %s",
|
|
format_type_be(procStruct->proargtypes.values[i]))));
|
|
}
|
|
|
|
if (typeStruct->typtype == 'c')
|
|
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 = DatumGetCString(DirectFunctionCall1(textout,
|
|
prosrcdatum));
|
|
|
|
/************************************************************
|
|
* Create the procedure in the interpreter
|
|
************************************************************/
|
|
prodesc->reference = plperl_create_sub(proc_source, prodesc->lanpltrusted);
|
|
pfree(proc_source);
|
|
if (!prodesc->reference) /* can this happen? */
|
|
{
|
|
free(prodesc->proname);
|
|
free(prodesc);
|
|
elog(ERROR, "could not create internal procedure \"%s\"",
|
|
internal_proname);
|
|
}
|
|
|
|
hv_store(plperl_proc_hash, internal_proname, proname_len,
|
|
newSVuv( PTR2UV( prodesc)), 0);
|
|
}
|
|
|
|
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();
|
|
|
|
for (i = 0; i < tupdesc->natts; i++)
|
|
{
|
|
Datum attr;
|
|
bool isnull;
|
|
char *attname;
|
|
char *outputstr;
|
|
Oid typoutput;
|
|
bool typisvarlena;
|
|
int namelen;
|
|
SV *sv;
|
|
|
|
if (tupdesc->attrs[i]->attisdropped)
|
|
continue;
|
|
|
|
attname = NameStr(tupdesc->attrs[i]->attname);
|
|
namelen = strlen(attname);
|
|
attr = heap_getattr(tuple, i + 1, tupdesc, &isnull);
|
|
|
|
if (isnull)
|
|
{
|
|
/* Store (attname => undef) and move on. */
|
|
hv_store(hv, attname, namelen, newSV(0), 0);
|
|
continue;
|
|
}
|
|
|
|
/* XXX should have a way to cache these lookups */
|
|
|
|
getTypeOutputInfo(tupdesc->attrs[i]->atttypid,
|
|
&typoutput, &typisvarlena);
|
|
|
|
outputstr = OidOutputFunctionCall(typoutput, attr);
|
|
|
|
sv = newSVpv(outputstr, 0);
|
|
#if PERL_BCDVERSION >= 0x5006000L
|
|
if (GetDatabaseEncoding() == PG_UTF8)
|
|
SvUTF8_on(sv);
|
|
#endif
|
|
hv_store(hv, attname, namelen, sv, 0);
|
|
|
|
pfree(outputstr);
|
|
}
|
|
|
|
return newRV_noinc((SV *) hv);
|
|
}
|
|
|
|
|
|
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;
|
|
|
|
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;
|
|
|
|
result = newHV();
|
|
|
|
hv_store(result, "status", strlen("status"),
|
|
newSVpv((char *) SPI_result_code_string(status), 0), 0);
|
|
hv_store(result, "processed", strlen("processed"),
|
|
newSViv(processed), 0);
|
|
|
|
if (status == SPI_OK_SELECT)
|
|
{
|
|
AV *rows;
|
|
SV *row;
|
|
int i;
|
|
|
|
rows = newAV();
|
|
for (i = 0; i < processed; i++)
|
|
{
|
|
row = plperl_hash_from_tuple(tuptable->vals[i], tuptable->tupdesc);
|
|
av_push(rows, row);
|
|
}
|
|
hv_store(result, "rows", strlen("rows"),
|
|
newRV_noinc((SV *) rows), 0);
|
|
}
|
|
|
|
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;
|
|
HeapTuple tuple;
|
|
|
|
if (!sv)
|
|
return;
|
|
|
|
prodesc = current_call_data->prodesc;
|
|
fcinfo = current_call_data->fcinfo;
|
|
rsi = (ReturnSetInfo *) fcinfo->resultinfo;
|
|
|
|
sv = plperl_transform_result(prodesc, sv);
|
|
|
|
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 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(true, 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)
|
|
{
|
|
tuple = plperl_build_tuple_result((HV *) SvRV(sv),
|
|
current_call_data->attinmeta);
|
|
}
|
|
else
|
|
{
|
|
Datum ret;
|
|
bool isNull;
|
|
|
|
if (SvOK(sv) && SvTYPE(sv) != SVt_NULL)
|
|
{
|
|
char *val;
|
|
SV *array_ret;
|
|
|
|
if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVAV )
|
|
{
|
|
array_ret = plperl_convert_to_pg_array(sv);
|
|
sv = array_ret;
|
|
}
|
|
|
|
val = SvPV(sv, PL_na);
|
|
|
|
ret = InputFunctionCall(&prodesc->result_in_func, val,
|
|
prodesc->result_typioparam, -1);
|
|
isNull = false;
|
|
}
|
|
else
|
|
{
|
|
ret = InputFunctionCall(&prodesc->result_in_func, NULL,
|
|
prodesc->result_typioparam, -1);
|
|
isNull = true;
|
|
}
|
|
|
|
tuple = heap_form_tuple(current_call_data->ret_tdesc, &ret, &isNull);
|
|
}
|
|
|
|
/* Make sure to store the tuple in a long-lived memory context */
|
|
MemoryContextSwitchTo(rsi->econtext->ecxt_per_query_memory);
|
|
tuplestore_puttuple(current_call_data->tuple_store, tuple);
|
|
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;
|
|
|
|
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 = newSVpv(portal->name, 0);
|
|
|
|
/* 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;
|
|
|
|
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 = SPI_cursor_find(cursor);
|
|
if (p)
|
|
SPI_cursor_close(p);
|
|
}
|
|
|
|
SV *
|
|
plperl_spi_prepare(char* query, int argc, SV ** argv)
|
|
{
|
|
plperl_query_desc *qdesc;
|
|
void *plan;
|
|
int i;
|
|
|
|
MemoryContext oldcontext = CurrentMemoryContext;
|
|
ResourceOwner oldowner = CurrentResourceOwner;
|
|
|
|
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), "%lx", (long) 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();
|
|
{
|
|
/************************************************************
|
|
* Lookup the argument types by name in the system cache
|
|
* and remember the required information for input conversion
|
|
************************************************************/
|
|
for (i = 0; i < argc; i++)
|
|
{
|
|
List *names;
|
|
HeapTuple typeTup;
|
|
|
|
/* Parse possibly-qualified type name and look it up in pg_type */
|
|
names = stringToQualifiedNameList(SvPV(argv[i], PL_na),
|
|
"plperl_spi_prepare");
|
|
typeTup = typenameType(NULL, makeTypeNameFromNameList(names));
|
|
qdesc->argtypes[i] = HeapTupleGetOid(typeTup);
|
|
perm_fmgr_info(((Form_pg_type) GETSTRUCT(typeTup))->typinput,
|
|
&(qdesc->arginfuncs[i]));
|
|
qdesc->argtypioparams[i] = getTypeIOParam(typeTup);
|
|
ReleaseSysCache(typeTup);
|
|
}
|
|
|
|
/************************************************************
|
|
* 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.
|
|
************************************************************/
|
|
hv_store( plperl_query_hash, qdesc->qname, strlen(qdesc->qname), newSVuv( PTR2UV( qdesc)), 0);
|
|
|
|
return newSVpv( qdesc->qname, strlen(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;
|
|
|
|
/*
|
|
* Execute the query inside a sub-transaction, so we can cope with
|
|
* errors sanely
|
|
*/
|
|
MemoryContext oldcontext = CurrentMemoryContext;
|
|
ResourceOwner oldowner = CurrentResourceOwner;
|
|
|
|
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.
|
|
************************************************************/
|
|
sv = hv_fetch(plperl_query_hash, query, strlen(query), 0);
|
|
if ( sv == NULL)
|
|
elog(ERROR, "spi_exec_prepared: Invalid prepared query passed");
|
|
if ( *sv == NULL || !SvOK( *sv))
|
|
elog(ERROR, "spi_exec_prepared: panic - plperl_query_hash value corrupted");
|
|
|
|
qdesc = INT2PTR( plperl_query_desc *, SvUV(*sv));
|
|
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( attr, "limit", 5, 0);
|
|
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 (SvTYPE(argv[i]) != SVt_NULL)
|
|
{
|
|
argvalues[i] = InputFunctionCall(&qdesc->arginfuncs[i],
|
|
SvPV(argv[i], PL_na),
|
|
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)
|
|
{
|
|
SV **sv;
|
|
int i;
|
|
char * nulls;
|
|
Datum *argvalues;
|
|
plperl_query_desc *qdesc;
|
|
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;
|
|
|
|
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.
|
|
************************************************************/
|
|
sv = hv_fetch(plperl_query_hash, query, strlen(query), 0);
|
|
if ( sv == NULL)
|
|
elog(ERROR, "spi_query_prepared: Invalid prepared query passed");
|
|
if ( *sv == NULL || !SvOK( *sv))
|
|
elog(ERROR, "spi_query_prepared: panic - plperl_query_hash value corrupted");
|
|
|
|
qdesc = INT2PTR( plperl_query_desc *, SvUV(*sv));
|
|
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 (SvTYPE(argv[i]) != SVt_NULL)
|
|
{
|
|
argvalues[i] = InputFunctionCall(&qdesc->arginfuncs[i],
|
|
SvPV(argv[i], PL_na),
|
|
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 = newSVpv(portal->name, 0);
|
|
|
|
/* 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)
|
|
{
|
|
SV ** sv;
|
|
void * plan;
|
|
plperl_query_desc *qdesc;
|
|
|
|
sv = hv_fetch(plperl_query_hash, query, strlen(query), 0);
|
|
if ( sv == NULL)
|
|
elog(ERROR, "spi_exec_freeplan: Invalid prepared query passed");
|
|
if ( *sv == NULL || !SvOK( *sv))
|
|
elog(ERROR, "spi_exec_freeplan: panic - plperl_query_hash value corrupted");
|
|
|
|
qdesc = INT2PTR( plperl_query_desc *, SvUV(*sv));
|
|
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
|
|
*/
|
|
hv_delete(plperl_query_hash, query, strlen(query), G_DISCARD);
|
|
plan = qdesc-> plan;
|
|
free(qdesc-> argtypes);
|
|
free(qdesc-> arginfuncs);
|
|
free(qdesc-> argtypioparams);
|
|
free(qdesc);
|
|
|
|
SPI_freeplan( plan);
|
|
}
|
|
|
|
/*
|
|
* If plerl result is hash and fce result is scalar, it's hash form of
|
|
* out argument. Then, transform it to scalar
|
|
*/
|
|
|
|
static SV *
|
|
plperl_transform_result(plperl_proc_desc *prodesc, SV *result)
|
|
{
|
|
bool exactly_one_field = false;
|
|
HV *hvr;
|
|
SV *val;
|
|
char *key;
|
|
I32 klen;
|
|
|
|
|
|
if (prodesc->num_out_args == 1 && SvOK(result)
|
|
&& SvTYPE(result) == SVt_RV && SvTYPE(SvRV(result)) == SVt_PVHV)
|
|
{
|
|
hvr = (HV *) SvRV(result);
|
|
hv_iterinit(hvr);
|
|
|
|
while ((val = hv_iternextsv(hvr, &key, &klen)))
|
|
{
|
|
if (exactly_one_field)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_UNDEFINED_COLUMN),
|
|
errmsg("Perl hash contains nonexistent column \"%s\"",
|
|
key)));
|
|
exactly_one_field = true;
|
|
result = val;
|
|
}
|
|
|
|
if (!exactly_one_field)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_UNDEFINED_COLUMN),
|
|
errmsg("Perl hash is empty")));
|
|
|
|
hv_iterinit(hvr);
|
|
}
|
|
|
|
return result;
|
|
}
|