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path: root/src/backend/utils/fmgr/fmgr.c
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Diffstat (limited to 'src/backend/utils/fmgr/fmgr.c')
-rw-r--r--src/backend/utils/fmgr/fmgr.c193
1 files changed, 98 insertions, 95 deletions
diff --git a/src/backend/utils/fmgr/fmgr.c b/src/backend/utils/fmgr/fmgr.c
index 7a3798ebe11..6a11bda292c 100644
--- a/src/backend/utils/fmgr/fmgr.c
+++ b/src/backend/utils/fmgr/fmgr.c
@@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/utils/fmgr/fmgr.c,v 1.9 1998/01/07 21:06:28 momjian Exp $
+ * $Header: /cvsroot/pgsql/src/backend/utils/fmgr/fmgr.c,v 1.10 1998/01/15 19:45:58 pgsql Exp $
*
*-------------------------------------------------------------------------
*/
@@ -32,78 +32,64 @@
#include "commands/trigger.h"
-char *
-fmgr_pl(Oid func_id,
- int n_arguments,
- FmgrValues * values,
- bool * isNull)
-{
- HeapTuple procedureTuple;
- HeapTuple languageTuple;
- Form_pg_proc procedureStruct;
- Form_pg_language languageStruct;
- func_ptr plcall_fn;
- int plcall_nargs;
-
- /* Fetch the pg_proc tuple from the syscache */
- procedureTuple = SearchSysCacheTuple(PROOID,
- ObjectIdGetDatum(func_id),
- 0, 0, 0);
- if (!HeapTupleIsValid(procedureTuple))
- {
- elog(ERROR, "fmgr_pl(): Cache lookup of procedure %ld failed.",
- ObjectIdGetDatum(func_id));
- }
- procedureStruct = (Form_pg_proc) GETSTRUCT(procedureTuple);
+static FmgrInfo *fmgr_pl_finfo;
- /* Fetch the pg_language tuple from the syscache */
- languageTuple = SearchSysCacheTuple(LANOID,
- ObjectIdGetDatum(procedureStruct->prolang),
- 0, 0, 0);
- if (!HeapTupleIsValid(languageTuple))
- {
- elog(ERROR, "fmgr_pl(): Cache lookup of language %ld for procedure %ld failed.",
- ObjectIdGetDatum(procedureStruct->prolang),
- ObjectIdGetDatum(func_id));
- }
- languageStruct = (Form_pg_language) GETSTRUCT(languageTuple);
-
- /* Get the function pointer for the PL call handler */
- fmgr_info(languageStruct->lanplcallfoid, &plcall_fn, &plcall_nargs);
- if (plcall_fn == NULL)
- {
- elog(ERROR, "fmgr_pl(): failed to load PL handler for procedure %ld.",
- ObjectIdGetDatum(func_id));
+static char *
+fmgr_pl(char *arg0, ...)
+{
+ va_list pvar;
+ FmgrValues values;
+ bool isNull = false;
+ int i;
+
+ memset(&values, 0, sizeof(values));
+
+ if (fmgr_pl_finfo->fn_nargs > 0) {
+ values.data[0] = arg0;
+ if (fmgr_pl_finfo->fn_nargs > 1) {
+ va_start(pvar, arg0);
+ for (i = 1; i < fmgr_pl_finfo->fn_nargs; i++) {
+ values.data[i] = va_arg(pvar, char *);
+ }
+ va_end(pvar);
+ }
}
/* Call the PL handler */
CurrentTriggerData = NULL;
- return (*plcall_fn) (func_id,
- n_arguments,
- values,
- isNull);
-}
-
-
-char *
-fmgr_c(func_ptr user_fn,
- Oid func_id,
- int n_arguments,
- FmgrValues * values,
- bool * isNull)
-{
- char *returnValue = (char *) NULL;
-
-
+ return (*(fmgr_pl_finfo->fn_plhandler)) (fmgr_pl_finfo,
+ &values,
+ &isNull);
+}
+
+
+char *
+fmgr_c(FmgrInfo *finfo,
+ FmgrValues * values,
+ bool * isNull)
+{
+ char *returnValue = (char *) NULL;
+ int n_arguments = finfo->fn_nargs;
+ func_ptr user_fn = fmgr_faddr(finfo);
+
+
if (user_fn == (func_ptr) NULL)
{
/*
* a NULL func_ptr denotet untrusted function (in postgres 4.2).
- * Untrusted functions have very limited use and is clumsy. We now
- * use this feature for procedural languages.
+ * Untrusted functions have very limited use and is clumsy. We
+ * just get rid of it.
*/
- return fmgr_pl(func_id, n_arguments, values, isNull);
+ elog(WARN, "internal error: untrusted function not supported.");
+ }
+
+ /*
+ * If finfo contains a PL handler for this function,
+ * call that instead.
+ */
+ if (finfo->fn_plhandler != NULL) {
+ return (*(finfo->fn_plhandler))(finfo, values, isNull);
}
switch (n_arguments)
@@ -164,14 +150,14 @@ fmgr_c(func_ptr user_fn,
break;
default:
elog(ERROR, "fmgr_c: function %d: too many arguments (%d > %d)",
- func_id, n_arguments, MAXFMGRARGS);
+ finfo->fn_oid, n_arguments, MAXFMGRARGS);
break;
}
return (returnValue);
}
void
-fmgr_info(Oid procedureId, func_ptr * function, int *nargs)
+fmgr_info(Oid procedureId, FmgrInfo *finfo)
{
func_ptr user_fn = NULL;
FmgrCall *fcp;
@@ -181,6 +167,10 @@ fmgr_info(Oid procedureId, func_ptr * function, int *nargs)
Form_pg_language languageStruct;
Oid language;
+ finfo->fn_addr = NULL;
+ finfo->fn_plhandler = NULL;
+ finfo->fn_oid = procedureId;
+
if (!(fcp = fmgr_isbuiltin(procedureId)))
{
procedureTuple = SearchSysCacheTuple(PROOID,
@@ -191,29 +181,29 @@ fmgr_info(Oid procedureId, func_ptr * function, int *nargs)
elog(ERROR, "fmgr_info: function %d: cache lookup failed\n",
procedureId);
}
- procedureStruct = (FormData_pg_proc *)
- GETSTRUCT(procedureTuple);
+ procedureStruct = (FormData_pg_proc *) GETSTRUCT(procedureTuple);
if (!procedureStruct->proistrusted)
{
- *function = (func_ptr) NULL;
- *nargs = procedureStruct->pronargs;
+ finfo->fn_addr = (func_ptr) NULL;
+ finfo->fn_nargs = procedureStruct->pronargs;
return;
}
language = procedureStruct->prolang;
switch (language)
{
case INTERNALlanguageId:
- user_fn = fmgr_lookupByName(procedureStruct->proname.data);
- if (!user_fn)
- elog(ERROR, "fmgr_info: function %s: not in internal table",
- procedureStruct->proname.data);
+ finfo->fn_addr =
+ fmgr_lookupByName(procedureStruct->proname.data);
+ if (!finfo->fn_addr)
+ elog(WARN, "fmgr_info: function %s: not in internal table",
+ procedureStruct->proname.data);
break;
case ClanguageId:
- user_fn = fmgr_dynamic(procedureId, nargs);
+ finfo->fn_addr = fmgr_dynamic(procedureId, &(finfo->fn_nargs));
break;
case SQLlanguageId:
- user_fn = (func_ptr) NULL;
- *nargs = procedureStruct->pronargs;
+ finfo->fn_addr = (func_ptr) NULL;
+ finfo->fn_nargs = procedureStruct->pronargs;
break;
default:
@@ -236,8 +226,12 @@ fmgr_info(Oid procedureId, func_ptr * function, int *nargs)
GETSTRUCT(languageTuple);
if (languageStruct->lanispl)
{
- user_fn = (func_ptr) NULL;
- *nargs = procedureStruct->pronargs;
+ FmgrInfo plfinfo;
+
+ fmgr_info(((Form_pg_language)GETSTRUCT(languageTuple))->lanplcallfoid, &plfinfo);
+ finfo->fn_addr = (func_ptr) fmgr_pl;
+ finfo->fn_plhandler = plfinfo.fn_addr;
+ finfo->fn_nargs = procedureStruct->pronargs;
}
else
{
@@ -249,10 +243,16 @@ fmgr_info(Oid procedureId, func_ptr * function, int *nargs)
}
else
{
- user_fn = fcp->func;
- *nargs = fcp->nargs;
+ finfo->fn_addr = fcp->func;
+ finfo->fn_nargs = fcp->nargs;
}
- *function = user_fn;
+}
+
+func_ptr
+fmgr_faddr(FmgrInfo *finfo)
+{
+ fmgr_pl_finfo = finfo;
+ return finfo->fn_addr;
}
/*
@@ -273,12 +273,13 @@ fmgr(Oid procedureId,...)
register i;
int pronargs;
FmgrValues values;
- func_ptr user_fn;
+ FmgrInfo finfo;
bool isNull = false;
va_start(pvar, procedureId);
- fmgr_info(procedureId, &user_fn, &pronargs);
+ fmgr_info(procedureId, &finfo);
+ pronargs = finfo.fn_nargs;
if (pronargs > MAXFMGRARGS)
{
@@ -290,8 +291,7 @@ fmgr(Oid procedureId,...)
va_end(pvar);
/* XXX see WAY_COOL_ORTHOGONAL_FUNCTIONS */
- return (fmgr_c(user_fn, procedureId, pronargs, &values,
- &isNull));
+ return (fmgr_c(&finfo, &values, &isNull));
}
/*
@@ -301,20 +301,26 @@ fmgr(Oid procedureId,...)
* the pointer, but it's available for use with macros in fmgr.h if you
* want this routine to do sanity-checking for you.
*
- * func_ptr, func_id, n_arguments, args...
+ * funcinfo, n_arguments, args...
*/
#ifdef NOT_USED
char *
-fmgr_ptr(func_ptr user_fn, Oid func_id,...)
+fmgr_ptr(FmgrInfo *finfo, ...)
{
va_list pvar;
register i;
int n_arguments;
+ FmgrInfo local_finfo;
FmgrValues values;
bool isNull = false;
- va_start(pvar, func_id);
+ local_finfo->fn_addr = finfo->fn_addr;
+ local_finfo->fn_plhandler = finfo->fn_plhandler;
+ local_finfo->fn_oid = finfo->fn_oid;
+
+ va_start(pvar, finfo);
n_arguments = va_arg(pvar, int);
+ local_finfo->fn_nargs = n_arguments;
if (n_arguments > MAXFMGRARGS)
{
elog(ERROR, "fmgr_ptr: function %d: too many arguments (%d > %d)",
@@ -325,8 +331,7 @@ fmgr_ptr(func_ptr user_fn, Oid func_id,...)
va_end(pvar);
/* XXX see WAY_COOL_ORTHOGONAL_FUNCTIONS */
- return (fmgr_c(user_fn, func_id, n_arguments, &values,
- &isNull));
+ return (fmgr_c(&local_finfo, &values, &isNull));
}
#endif
@@ -339,16 +344,14 @@ fmgr_ptr(func_ptr user_fn, Oid func_id,...)
char *
fmgr_array_args(Oid procedureId, int nargs, char *args[], bool * isNull)
{
- func_ptr user_fn;
- int true_arguments;
+ FmgrInfo finfo;
- fmgr_info(procedureId, &user_fn, &true_arguments);
+ fmgr_info(procedureId, &finfo);
+ finfo.fn_nargs = nargs;
/* XXX see WAY_COOL_ORTHOGONAL_FUNCTIONS */
return
- (fmgr_c(user_fn,
- procedureId,
- true_arguments,
+ (fmgr_c(&finfo,
(FmgrValues *) args,
isNull));
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-06-03 22:49:34 +0000