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mirror of https://github.com/postgres/postgres.git synced 2025-07-28 23:42:10 +03:00

Revise handling of oldstyle/newstyle functions per recent discussions

in pghackers list.  Support for oldstyle internal functions is gone
(no longer needed, since conversion is complete) and pg_language entry
'internal' now implies newstyle call convention.  pg_language entry
'newC' is gone; both old and newstyle dynamically loaded C functions
are now called language 'C'.  A newstyle function must be identified
by an associated info routine.  See src/backend/utils/fmgr/README.
This commit is contained in:
Tom Lane
2000-11-20 20:36:57 +00:00
parent 99198ac6b8
commit 5bb2300b59
52 changed files with 571 additions and 328 deletions

View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/catalog/pg_proc.c,v 1.50 2000/11/16 22:30:17 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/catalog/pg_proc.c,v 1.51 2000/11/20 20:36:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -229,50 +229,35 @@ ProcedureCreate(char *procedureName,
* FUNCTION xyz AS '' LANGUAGE 'internal'. To preserve some modicum
* of backwards compatibility, accept an empty 'prosrc' value as
* meaning the supplied SQL function name.
*
* XXX: we could treat "internal" and "newinternal" language specs
* as equivalent, and take the actual language ID from the table of
* known builtin functions. Is that a better idea than making the
* user specify the right thing? Not sure.
*/
if (languageObjectId == INTERNALlanguageId ||
languageObjectId == NEWINTERNALlanguageId)
if (languageObjectId == INTERNALlanguageId)
{
Oid actualLangID;
if (strlen(prosrc) == 0)
prosrc = procedureName;
actualLangID = fmgr_internal_language(prosrc);
if (actualLangID == InvalidOid)
if (fmgr_internal_function(prosrc) == InvalidOid)
elog(ERROR,
"ProcedureCreate: there is no builtin function named \"%s\"",
prosrc);
if (actualLangID != languageObjectId)
elog(ERROR,
"ProcedureCreate: \"%s\" is not %s internal function",
prosrc,
((languageObjectId == INTERNALlanguageId) ?
"an old-style" : "a new-style"));
}
/*
* If this is a dynamically loadable procedure, make sure that the
* library file exists, is loadable, and contains the specified link
* symbol.
* symbol. Also check for a valid function information record.
*
* We used to perform these checks only when the function was first
* called, but it seems friendlier to verify the library's validity
* at CREATE FUNCTION time.
*/
if (languageObjectId == ClanguageId ||
languageObjectId == NEWClanguageId)
if (languageObjectId == ClanguageId)
{
/* If link symbol is specified as "-", substitute procedure name */
if (strcmp(prosrc, "-") == 0)
prosrc = procedureName;
(void) load_external_function(probin, prosrc);
(void) load_external_function(probin, prosrc, true);
(void) fetch_finfo_record(probin, prosrc);
}
/*

View File

@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/define.c,v 1.48 2000/11/16 22:30:18 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/define.c,v 1.49 2000/11/20 20:36:47 tgl Exp $
*
* DESCRIPTION
* The "DefineFoo" routines take the parse tree and pick out the
@ -66,7 +66,7 @@ case_translate_language_name(const char *input, char *output)
{
/*-------------------------------------------------------------------------
Translate the input language name to lower case, except if it's "C",
translate to upper case, or "newC", translate to that spelling.
translate to upper case.
--------------------------------------------------------------------------*/
int i;
@ -77,8 +77,6 @@ case_translate_language_name(const char *input, char *output)
if (strcmp(output, "c") == 0)
output[0] = 'C';
else if (strcmp(output, "newc") == 0)
output[3] = 'C';
}
@ -183,8 +181,7 @@ interpret_AS_clause(const char *languageName, const List *as,
{
Assert(as != NIL);
if (strcmp(languageName, "C") == 0 ||
strcmp(languageName, "newC") == 0)
if (strcmp(languageName, "C") == 0)
{
/*
@ -230,8 +227,8 @@ CreateFunction(ProcedureStmt *stmt, CommandDest dest)
char languageName[NAMEDATALEN];
/*
* name of language of function, with case adjusted: "C", "newC",
* "internal", "newinternal", "sql", etc.
* name of language of function, with case adjusted: "C",
* "internal", "sql", etc.
*/
bool returnsSet;
@ -255,9 +252,7 @@ CreateFunction(ProcedureStmt *stmt, CommandDest dest)
* Apply appropriate security checks depending on language.
*/
if (strcmp(languageName, "C") == 0 ||
strcmp(languageName, "newC") == 0 ||
strcmp(languageName, "internal") == 0 ||
strcmp(languageName, "newinternal") == 0)
strcmp(languageName, "internal") == 0)
{
if (!superuser())
elog(ERROR,
@ -283,8 +278,8 @@ CreateFunction(ProcedureStmt *stmt, CommandDest dest)
if (!HeapTupleIsValid(languageTuple))
elog(ERROR,
"Unrecognized language specified in a CREATE FUNCTION: "
"'%s'.\n\tRecognized languages are sql, C, newC, "
"internal, newinternal, and created procedural languages.",
"'%s'.\n\tRecognized languages are sql, C, "
"internal, and created procedural languages.",
languageName);
/* Check that this language is a PL */

View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/Attic/remove.c,v 1.55 2000/11/16 22:30:18 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/Attic/remove.c,v 1.56 2000/11/20 20:36:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -344,8 +344,7 @@ RemoveFunction(char *functionName, /* function name to be removed */
if (!HeapTupleIsValid(tup))
func_error("RemoveFunction", functionName, nargs, argList, NULL);
if (((Form_pg_proc) GETSTRUCT(tup))->prolang == INTERNALlanguageId ||
((Form_pg_proc) GETSTRUCT(tup))->prolang == NEWINTERNALlanguageId)
if (((Form_pg_proc) GETSTRUCT(tup))->prolang == INTERNALlanguageId)
{
/* "Helpful" notice when removing a builtin function ... */
elog(NOTICE, "Removing built-in function \"%s\"", functionName);

View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/trigger.c,v 1.80 2000/11/16 22:30:18 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/trigger.c,v 1.81 2000/11/20 20:36:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -169,10 +169,7 @@ CreateTrigger(CreateTrigStmt *stmt)
funclang = ((Form_pg_proc) GETSTRUCT(tuple))->prolang;
ReleaseSysCache(tuple);
if (funclang != ClanguageId &&
funclang != NEWClanguageId &&
funclang != INTERNALlanguageId &&
funclang != NEWINTERNALlanguageId)
if (funclang != ClanguageId && funclang != INTERNALlanguageId)
{
HeapTuple langTup;
@ -180,10 +177,10 @@ CreateTrigger(CreateTrigStmt *stmt)
ObjectIdGetDatum(funclang),
0, 0, 0);
if (!HeapTupleIsValid(langTup))
elog(ERROR, "CreateTrigger: cache lookup for PL %u failed",
elog(ERROR, "CreateTrigger: cache lookup for language %u failed",
funclang);
if (((Form_pg_language) GETSTRUCT(langTup))->lanispl == false)
elog(ERROR, "CreateTrigger: only builtin, C and PL functions are supported");
elog(ERROR, "CreateTrigger: only internal, C and PL functions are supported");
ReleaseSysCache(langTup);
}

View File

@ -9,7 +9,7 @@
#
#
# IDENTIFICATION
# $Header: /cvsroot/pgsql/src/backend/utils/Attic/Gen_fmgrtab.sh,v 1.17 2000/07/13 16:07:06 petere Exp $
# $Header: /cvsroot/pgsql/src/backend/utils/Attic/Gen_fmgrtab.sh,v 1.18 2000/11/20 20:36:48 tgl Exp $
#
#-------------------------------------------------------------------------
@ -82,7 +82,7 @@ trap 'echo "Caught signal." ; cleanup ; exit 1' 1 2 15
#
# Generate the file containing raw pg_proc tuple data
# (but only for "internal" and "newinternal" language procedures...).
# (but only for "internal" language procedures...).
#
# Unlike genbki.sh, which can run through cpp last, we have to
# deal with preprocessor statements first (before we sort the
@ -99,7 +99,6 @@ sed -e 's/^.*OID[^=]*=[^0-9]*//' \
-e 's/[ ]*).*$//' | \
$AWK '
/^#/ { print; next; }
$4 == "11" { print; next; }
$4 == "12" { print; next; }' > $CPPTMPFILE
if [ $? -ne 0 ]; then
@ -182,10 +181,6 @@ FuNkYfMgRsTuFf
# Generate fmgr's built-in-function table.
#
# Print out the function declarations, then the table that refers to them.
# NB: the function declarations are bogus in the case of old-style functions,
# although they should be correct for new-style. Therefore we need to compile
# this table definition as a separate C file that won't need to include any
# "real" declarations for those functions!
#
cat > "$$-$TABLEFILE" <<FuNkYfMgRtAbStUfF
/*-------------------------------------------------------------------------
@ -205,10 +200,6 @@ cat > "$$-$TABLEFILE" <<FuNkYfMgRtAbStUfF
* It has been GENERATED by $CMDNAME
* from $INFILE
*
* We lie here to cc about the return type and arguments of old-style
* builtin functions; all ld cares about is the fact that it
* will need to resolve an external function reference.
*
*-------------------------------------------------------------------------
*/
@ -237,13 +228,11 @@ FuNkYfMgRtAbStUfF
# conditional expression instead. Not all awks have conditional expressions.
$AWK 'BEGIN {
Strict["t"] = "true"
Strict["f"] = "false"
OldStyle["11"] = "true"
OldStyle["12"] = "false"
Bool["t"] = "true"
Bool["f"] = "false"
}
{ printf (" { %d, \"%s\", %d, %s, %s, %s },\n"), \
$1, $(NF-1), $9, Strict[$8], OldStyle[$4], $(NF-1)
$1, $(NF-1), $9, Bool[$8], Bool[$10], $(NF-1)
}' $RAWFILE >> "$$-$TABLEFILE"
if [ $? -ne 0 ]; then

View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/cache/lsyscache.c,v 1.47 2000/11/16 22:30:33 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/cache/lsyscache.c,v 1.48 2000/11/20 20:36:49 tgl Exp $
*
* NOTES
* Eventually, the index information should go through here, too.
@ -731,6 +731,27 @@ get_typalign(Oid typid)
#endif
char
get_typstorage(Oid typid)
{
HeapTuple tp;
tp = SearchSysCache(TYPEOID,
ObjectIdGetDatum(typid),
0, 0, 0);
if (HeapTupleIsValid(tp))
{
Form_pg_type typtup = (Form_pg_type) GETSTRUCT(tp);
char result;
result = typtup->typstorage;
ReleaseSysCache(tp);
return result;
}
else
return 'p';
}
/*
* get_typdefault
*

View File

@ -8,20 +8,17 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/fmgr/dfmgr.c,v 1.45 2000/11/16 22:30:34 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/fmgr/dfmgr.c,v 1.46 2000/11/20 20:36:49 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include <sys/types.h>
#include <sys/stat.h>
#include "postgres.h"
#include "catalog/pg_proc.h"
#include "dynloader.h"
#include "utils/dynamic_loader.h"
#include "utils/builtins.h"
#include "utils/syscache.h"
/*
@ -46,55 +43,16 @@ static DynamicFileList *file_tail = (DynamicFileList *) NULL;
#define SAME_INODE(A,B) ((A).st_ino == (B).inode && (A).st_dev == (B).device)
/*
* Load the specified dynamic-link library file, and look for a function
* named funcname in it. If the function is not found, we raise an error
* if signalNotFound is true, else return (PGFunction) NULL. Note that
* errors in loading the library will provoke elog regardless of
* signalNotFound.
*/
PGFunction
fmgr_dynamic(Oid functionId)
{
HeapTuple procedureTuple;
Form_pg_proc procedureStruct;
char *proname,
*prosrcstring,
*probinstring;
Datum prosrcattr,
probinattr;
PGFunction user_fn;
bool isnull;
procedureTuple = SearchSysCache(PROCOID,
ObjectIdGetDatum(functionId),
0, 0, 0);
if (!HeapTupleIsValid(procedureTuple))
elog(ERROR, "fmgr_dynamic: function %u: cache lookup failed",
functionId);
procedureStruct = (Form_pg_proc) GETSTRUCT(procedureTuple);
proname = NameStr(procedureStruct->proname);
prosrcattr = SysCacheGetAttr(PROCOID, procedureTuple,
Anum_pg_proc_prosrc, &isnull);
if (isnull)
elog(ERROR, "fmgr: Could not extract prosrc for %u from pg_proc",
functionId);
prosrcstring = DatumGetCString(DirectFunctionCall1(textout, prosrcattr));
probinattr = SysCacheGetAttr(PROCOID, procedureTuple,
Anum_pg_proc_probin, &isnull);
if (isnull)
elog(ERROR, "fmgr: Could not extract probin for %u from pg_proc",
functionId);
probinstring = DatumGetCString(DirectFunctionCall1(textout, probinattr));
user_fn = load_external_function(probinstring, prosrcstring);
pfree(prosrcstring);
pfree(probinstring);
ReleaseSysCache(procedureTuple);
return user_fn;
}
PGFunction
load_external_function(char *filename, char *funcname)
load_external_function(char *filename, char *funcname,
bool signalNotFound)
{
DynamicFileList *file_scanner;
PGFunction retval;
@ -164,7 +122,7 @@ load_external_function(char *filename, char *funcname)
retval = pg_dlsym(file_scanner->handle, funcname);
if (retval == (PGFunction) NULL)
if (retval == (PGFunction) NULL && signalNotFound)
elog(ERROR, "Can't find function %s in file %s", funcname, filename);
return retval;
@ -217,5 +175,5 @@ load_file(char *filename)
}
}
load_external_function(filename, (char *) NULL);
load_external_function(filename, (char *) NULL, false);
}

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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/fmgr/fmgr.c,v 1.47 2000/11/16 22:30:34 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/fmgr/fmgr.c,v 1.48 2000/11/20 20:36:49 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -20,6 +20,7 @@
#include "executor/functions.h"
#include "utils/builtins.h"
#include "utils/fmgrtab.h"
#include "utils/lsyscache.h"
#include "utils/syscache.h"
/*
@ -42,7 +43,19 @@ typedef int32 ((*func_ptr) ());
typedef char *((*func_ptr) ());
#endif
/*
* For an oldstyle function, fn_extra points to a record like this:
*/
typedef struct
{
func_ptr func; /* Address of the oldstyle function */
bool arg_toastable[FUNC_MAX_ARGS]; /* is n'th arg of a toastable
* datatype? */
} Oldstyle_fnextra;
static void fmgr_info_C_lang(FmgrInfo *finfo, HeapTuple procedureTuple);
static void fmgr_info_other_lang(FmgrInfo *finfo, HeapTuple procedureTuple);
static Datum fmgr_oldstyle(PG_FUNCTION_ARGS);
static Datum fmgr_untrusted(PG_FUNCTION_ARGS);
@ -104,9 +117,6 @@ fmgr_info(Oid functionId, FmgrInfo *finfo)
const FmgrBuiltin *fbp;
HeapTuple procedureTuple;
Form_pg_proc procedureStruct;
HeapTuple languageTuple;
Form_pg_language languageStruct;
Oid language;
char *prosrc;
finfo->fn_oid = functionId;
@ -120,16 +130,8 @@ fmgr_info(Oid functionId, FmgrInfo *finfo)
*/
finfo->fn_nargs = fbp->nargs;
finfo->fn_strict = fbp->strict;
finfo->fn_retset = false; /* assume no builtins return sets! */
if (fbp->oldstyle)
{
finfo->fn_addr = fmgr_oldstyle;
finfo->fn_extra = (void *) fbp->func;
}
else
{
finfo->fn_addr = fbp->func;
}
finfo->fn_retset = fbp->retset;
finfo->fn_addr = fbp->func;
return;
}
@ -148,16 +150,15 @@ fmgr_info(Oid functionId, FmgrInfo *finfo)
if (!procedureStruct->proistrusted)
{
/* This isn't really supported anymore... */
finfo->fn_addr = fmgr_untrusted;
ReleaseSysCache(procedureTuple);
return;
}
language = procedureStruct->prolang;
switch (language)
switch (procedureStruct->prolang)
{
case INTERNALlanguageId:
case NEWINTERNALlanguageId:
/*
* For an ordinary builtin function, we should never get
* here because the isbuiltin() search above will have
@ -175,24 +176,12 @@ fmgr_info(Oid functionId, FmgrInfo *finfo)
elog(ERROR, "fmgr_info: function %s not in internal table",
prosrc);
pfree(prosrc);
if (fbp->oldstyle)
{
finfo->fn_addr = fmgr_oldstyle;
finfo->fn_extra = (void *) fbp->func;
}
else
{
finfo->fn_addr = fbp->func;
}
/* Should we check that nargs, strict, retset match the table? */
finfo->fn_addr = fbp->func;
break;
case ClanguageId:
finfo->fn_addr = fmgr_oldstyle;
finfo->fn_extra = (void *) fmgr_dynamic(functionId);
break;
case NEWClanguageId:
finfo->fn_addr = fmgr_dynamic(functionId);
fmgr_info_C_lang(finfo, procedureTuple);
break;
case SQLlanguageId:
@ -200,92 +189,234 @@ fmgr_info(Oid functionId, FmgrInfo *finfo)
break;
default:
/*
* Might be a created procedural language; try to look it up.
*/
languageTuple = SearchSysCache(LANGOID,
ObjectIdGetDatum(language),
0, 0, 0);
if (!HeapTupleIsValid(languageTuple))
elog(ERROR, "fmgr_info: cache lookup for language %u failed",
language);
languageStruct = (Form_pg_language) GETSTRUCT(languageTuple);
if (languageStruct->lanispl)
{
FmgrInfo plfinfo;
fmgr_info(languageStruct->lanplcallfoid, &plfinfo);
finfo->fn_addr = plfinfo.fn_addr;
/*
* If lookup of the PL handler function produced nonnull
* fn_extra, complain --- it must be an oldstyle function!
* We no longer support oldstyle PL handlers.
*/
if (plfinfo.fn_extra != NULL)
elog(ERROR, "fmgr_info: language %u has old-style handler",
language);
}
else
{
elog(ERROR, "fmgr_info: function %u: unsupported language %u",
functionId, language);
}
ReleaseSysCache(languageTuple);
fmgr_info_other_lang(finfo, procedureTuple);
break;
}
ReleaseSysCache(procedureTuple);
}
/*
* Special fmgr_info processing for C-language functions
*/
static void
fmgr_info_C_lang(FmgrInfo *finfo, HeapTuple procedureTuple)
{
Form_pg_proc procedureStruct = (Form_pg_proc) GETSTRUCT(procedureTuple);
Datum prosrcattr,
probinattr;
char *prosrcstring,
*probinstring;
PGFunction user_fn;
Pg_finfo_record *inforec;
Oldstyle_fnextra *fnextra;
bool isnull;
int i;
/* Get prosrc and probin strings (link symbol and library filename) */
prosrcattr = SysCacheGetAttr(PROCOID, procedureTuple,
Anum_pg_proc_prosrc, &isnull);
if (isnull)
elog(ERROR, "fmgr: Could not extract prosrc for %u from pg_proc",
finfo->fn_oid);
prosrcstring = DatumGetCString(DirectFunctionCall1(textout, prosrcattr));
probinattr = SysCacheGetAttr(PROCOID, procedureTuple,
Anum_pg_proc_probin, &isnull);
if (isnull)
elog(ERROR, "fmgr: Could not extract probin for %u from pg_proc",
finfo->fn_oid);
probinstring = DatumGetCString(DirectFunctionCall1(textout, probinattr));
/* Look up the function itself */
user_fn = load_external_function(probinstring, prosrcstring, true);
/* Get the function information record (real or default) */
inforec = fetch_finfo_record(probinstring, prosrcstring);
switch (inforec->api_version)
{
case 0:
/* Old style: need to use a handler */
finfo->fn_addr = fmgr_oldstyle;
/* OK to use palloc here because fn_mcxt is CurrentMemoryContext */
fnextra = (Oldstyle_fnextra *) palloc(sizeof(Oldstyle_fnextra));
finfo->fn_extra = (void *) fnextra;
MemSet(fnextra, 0, sizeof(Oldstyle_fnextra));
fnextra->func = (func_ptr) user_fn;
for (i = 0; i < procedureStruct->pronargs; i++)
{
fnextra->arg_toastable[i] =
TypeIsToastable(procedureStruct->proargtypes[i]);
}
break;
case 1:
/* New style: call directly */
finfo->fn_addr = user_fn;
break;
default:
/* Shouldn't get here if fetch_finfo_record did its job */
elog(ERROR, "Unknown function API version %d",
inforec->api_version);
break;
}
pfree(prosrcstring);
pfree(probinstring);
}
/*
* Specialized lookup routine for pg_proc.c: given the alleged name of
* an internal function, return the OID of the function's language.
* If the name is not known, return InvalidOid.
* Special fmgr_info processing for other-language functions
*/
static void
fmgr_info_other_lang(FmgrInfo *finfo, HeapTuple procedureTuple)
{
Form_pg_proc procedureStruct = (Form_pg_proc) GETSTRUCT(procedureTuple);
Oid language = procedureStruct->prolang;
HeapTuple languageTuple;
Form_pg_language languageStruct;
languageTuple = SearchSysCache(LANGOID,
ObjectIdGetDatum(language),
0, 0, 0);
if (!HeapTupleIsValid(languageTuple))
elog(ERROR, "fmgr_info: cache lookup for language %u failed",
language);
languageStruct = (Form_pg_language) GETSTRUCT(languageTuple);
if (languageStruct->lanispl)
{
FmgrInfo plfinfo;
fmgr_info(languageStruct->lanplcallfoid, &plfinfo);
finfo->fn_addr = plfinfo.fn_addr;
/*
* If lookup of the PL handler function produced nonnull
* fn_extra, complain --- it must be an oldstyle function!
* We no longer support oldstyle PL handlers.
*/
if (plfinfo.fn_extra != NULL)
elog(ERROR, "fmgr_info: language %u has old-style handler",
language);
}
else
{
elog(ERROR, "fmgr_info: function %u: unsupported language %u",
finfo->fn_oid, language);
}
ReleaseSysCache(languageTuple);
}
/*
* Fetch and validate the information record for the given external function.
*
* If no info function exists for the given name, it is not an error.
* Instead we return a default info record for a version-0 function.
* We want to raise an error here only if the info function returns
* something bogus.
*
* This function is broken out of fmgr_info_C_lang() so that ProcedureCreate()
* can validate the information record for a function not yet entered into
* pg_proc.
*/
Pg_finfo_record *
fetch_finfo_record(char *filename, char *funcname)
{
char *infofuncname;
PGFInfoFunction infofunc;
Pg_finfo_record *inforec;
static Pg_finfo_record default_inforec = { 0 };
/* Compute name of info func */
infofuncname = (char *) palloc(strlen(funcname) + 10);
sprintf(infofuncname, "pg_finfo_%s", funcname);
/* Try to look up the info function */
infofunc = (PGFInfoFunction) load_external_function(filename,
infofuncname,
false);
if (infofunc == (PGFInfoFunction) NULL)
{
/* Not found --- assume version 0 */
pfree(infofuncname);
return &default_inforec;
}
/* Found, so call it */
inforec = (*infofunc)();
/* Validate result as best we can */
if (inforec == NULL)
elog(ERROR, "Null result from %s", infofuncname);
switch (inforec->api_version)
{
case 0:
case 1:
/* OK, no additional fields to validate */
break;
default:
elog(ERROR, "Unknown version %d reported by %s",
inforec->api_version, infofuncname);
break;
}
pfree(infofuncname);
return inforec;
}
/*
* Specialized lookup routine for ProcedureCreate(): given the alleged name
* of an internal function, return the OID of the function.
* If the name is not recognized, return InvalidOid.
*/
Oid
fmgr_internal_language(const char *proname)
fmgr_internal_function(const char *proname)
{
const FmgrBuiltin *fbp = fmgr_lookupByName(proname);
if (fbp == NULL)
return InvalidOid;
return fbp->oldstyle ? INTERNALlanguageId : NEWINTERNALlanguageId;
return fbp->foid;
}
/*
* Handler for old-style internal and "C" language functions
*
* We expect fmgr_info to have placed the old-style function's address
* in fn_extra of *flinfo. This is a bit of a hack since fn_extra is really
* void * which might be a different size than a pointer to function, but
* it will work on any machine that our old-style call interface works on...
* Handler for old-style "C" language functions
*/
static Datum
fmgr_oldstyle(PG_FUNCTION_ARGS)
{
char *returnValue = NULL;
Oldstyle_fnextra *fnextra;
int n_arguments = fcinfo->nargs;
int i;
bool isnull;
func_ptr user_fn;
char *returnValue;
if (fcinfo->flinfo == NULL || fcinfo->flinfo->fn_extra == NULL)
elog(ERROR, "Internal error: fmgr_oldstyle received NULL function pointer");
elog(ERROR, "Internal error: fmgr_oldstyle received NULL pointer");
fnextra = (Oldstyle_fnextra *) fcinfo->flinfo->fn_extra;
/*
* Result is NULL if any argument is NULL, but we still call the function
* (peculiar, but that's the way it worked before, and after all this is
* a backwards-compatibility wrapper). Note, however, that we'll never
* get here with NULL arguments if the function is marked strict.
*
* We also need to detoast any TOAST-ed inputs, since it's unlikely that
* an old-style function knows about TOASTing.
*/
isnull = false;
for (i = 0; i < n_arguments; i++)
isnull |= PG_ARGISNULL(i);
{
if (PG_ARGISNULL(i))
isnull = true;
else if (fnextra->arg_toastable[i])
fcinfo->arg[i] = PointerGetDatum(PG_DETOAST_DATUM(fcinfo->arg[i]));
}
fcinfo->isnull = isnull;
user_fn = (func_ptr) fcinfo->flinfo->fn_extra;
user_fn = fnextra->func;
switch (n_arguments)
{
@ -411,6 +542,7 @@ fmgr_oldstyle(PG_FUNCTION_ARGS)
*/
elog(ERROR, "fmgr_oldstyle: function %u: too many arguments (%d > %d)",
fcinfo->flinfo->fn_oid, n_arguments, 16);
returnValue = NULL; /* keep compiler quiet */
break;
}

View File

@ -8,7 +8,7 @@
#
#
# IDENTIFICATION
# $Header: /cvsroot/pgsql/src/bin/scripts/Attic/createlang.sh,v 1.19 2000/11/13 23:37:53 momjian Exp $
# $Header: /cvsroot/pgsql/src/bin/scripts/Attic/createlang.sh,v 1.20 2000/11/20 20:36:50 tgl Exp $
#
#-------------------------------------------------------------------------
@ -259,7 +259,7 @@ fi
# ----------
# Create the call handler and the language
# ----------
$PSQL "CREATE FUNCTION $handler () RETURNS OPAQUE AS '$PGLIB/${object}$DLSUFFIX' LANGUAGE 'newC'"
$PSQL "CREATE FUNCTION $handler () RETURNS OPAQUE AS '$PGLIB/${object}$DLSUFFIX' LANGUAGE 'C'"
if [ $? -ne 0 ]; then
echo "$CMDNAME: language installation failed" 1>&2
exit 1

View File

@ -37,7 +37,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: catversion.h,v 1.61 2000/11/20 05:18:40 vadim Exp $
* $Id: catversion.h,v 1.62 2000/11/20 20:36:50 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -53,6 +53,6 @@
*/
/* yyyymmddN */
#define CATALOG_VERSION_NO 200011191
#define CATALOG_VERSION_NO 200011201
#endif

View File

@ -8,7 +8,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: pg_language.h,v 1.11 2000/05/28 17:56:16 tgl Exp $
* $Id: pg_language.h,v 1.12 2000/11/20 20:36:50 tgl Exp $
*
* NOTES
* the genbki.sh script reads this file and generates .bki
@ -63,18 +63,12 @@ typedef FormData_pg_language *Form_pg_language;
* ----------------
*/
DATA(insert OID = 11 ( internal f f 0 "n/a" ));
DESCR("old-style built-in functions");
#define INTERNALlanguageId 11
DATA(insert OID = 12 ( newinternal f f 0 "n/a" ));
DESCR("new-style built-in functions");
#define NEWINTERNALlanguageId 12
DATA(insert OID = 12 ( internal f f 0 "n/a" ));
DESCR("Built-in functions");
#define INTERNALlanguageId 12
DATA(insert OID = 13 ( "C" f f 0 "/bin/cc" ));
DESCR("Dynamically-loaded old-style C functions");
DESCR("Dynamically-loaded C functions");
#define ClanguageId 13
DATA(insert OID = 10 ( "newC" f f 0 "/bin/cc" ));
DESCR("Dynamically-loaded new-style C functions");
#define NEWClanguageId 10
DATA(insert OID = 14 ( "sql" f f 0 "postgres"));
DESCR("SQL-language functions");
#define SQLlanguageId 14

View File

@ -11,7 +11,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: fmgr.h,v 1.10 2000/08/24 03:29:11 tgl Exp $
* $Id: fmgr.h,v 1.11 2000/11/20 20:36:50 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -208,6 +208,43 @@ extern struct varlena * pg_detoast_datum_copy(struct varlena * datum);
#define PG_RETURN_VARCHAR_P(x) PG_RETURN_POINTER(x)
/*-------------------------------------------------------------------------
* Support for detecting call convention of dynamically-loaded functions
*
* Dynamically loaded functions may use either the version-1 ("new style")
* or version-0 ("old style") calling convention. Version 1 is the call
* convention defined in this header file; version 0 is the old "plain C"
* convention. A version-1 function must be accompanied by the macro call
*
* PG_FUNCTION_INFO_V1(function_name);
*
* Note that internal functions do not need this decoration since they are
* assumed to be version-1.
*
*-------------------------------------------------------------------------
*/
typedef struct
{
int api_version; /* specifies call convention version number */
/* More fields may be added later, for version numbers > 1. */
} Pg_finfo_record;
/* Expected signature of an info function */
typedef Pg_finfo_record * (*PGFInfoFunction) (void);
/* Macro to build an info function associated with the given function name */
#define PG_FUNCTION_INFO_V1(funcname) \
extern Pg_finfo_record * CppConcat(pg_finfo_,funcname) (void); \
Pg_finfo_record * \
CppConcat(pg_finfo_,funcname) (void) \
{ \
static Pg_finfo_record my_finfo = { 1 }; \
return &my_finfo; \
}
/*-------------------------------------------------------------------------
* Support routines and macros for callers of fmgr-compatible functions
*-------------------------------------------------------------------------
@ -297,13 +334,14 @@ extern Datum OidFunctionCall9(Oid functionId, Datum arg1, Datum arg2,
/*
* Routines in fmgr.c
*/
extern Oid fmgr_internal_language(const char *proname);
extern Pg_finfo_record *fetch_finfo_record(char *filename, char *funcname);
extern Oid fmgr_internal_function(const char *proname);
/*
* Routines in dfmgr.c
*/
extern PGFunction fmgr_dynamic(Oid functionId);
extern PGFunction load_external_function(char *filename, char *funcname);
extern PGFunction load_external_function(char *filename, char *funcname,
bool signalNotFound);
extern void load_file(char *filename);

View File

@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: fmgrtab.h,v 1.13 2000/05/28 17:56:20 tgl Exp $
* $Id: fmgrtab.h,v 1.14 2000/11/20 20:36:51 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -28,7 +28,7 @@ typedef struct
const char *funcName; /* C name of the function */
short nargs; /* 0..FUNC_MAX_ARGS, or -1 if variable count */
bool strict; /* T if function is "strict" */
bool oldstyle; /* T if function uses old fmgr interface */
bool retset; /* T if function returns a set */
PGFunction func; /* pointer to compiled function */
} FmgrBuiltin;

View File

@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: lsyscache.h,v 1.27 2000/11/16 22:30:49 tgl Exp $
* $Id: lsyscache.h,v 1.28 2000/11/20 20:36:51 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -39,6 +39,9 @@ extern char *get_rel_name(Oid relid);
extern int16 get_typlen(Oid typid);
extern bool get_typbyval(Oid typid);
extern void get_typlenbyval(Oid typid, int16 *typlen, bool *typbyval);
extern char get_typstorage(Oid typid);
extern Datum get_typdefault(Oid typid);
#define TypeIsToastable(typid) (get_typstorage(typid) != 'p')
#endif /* LSYSCACHE_H */

View File

@ -33,7 +33,7 @@
* ENHANCEMENTS, OR MODIFICATIONS.
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/pl/plperl/plperl.c,v 1.15 2000/11/16 22:30:49 tgl Exp $
* $Header: /cvsroot/pgsql/src/pl/plperl/plperl.c,v 1.16 2000/11/20 20:36:51 tgl Exp $
*
**********************************************************************/
@ -258,6 +258,7 @@ plperl_init_safe_interp(void)
* call this function for execution of
* perl procedures.
**********************************************************************/
PG_FUNCTION_INFO_V1(plperl_call_handler);
/* keep non-static */
Datum

View File

@ -3,7 +3,7 @@
* procedural language
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/pl/plpgsql/src/pl_handler.c,v 1.5 2000/05/29 01:59:14 tgl Exp $
* $Header: /cvsroot/pgsql/src/pl/plpgsql/src/pl_handler.c,v 1.6 2000/11/20 20:36:52 tgl Exp $
*
* This software is copyrighted by Jan Wieck - Hamburg.
*
@ -66,6 +66,8 @@ static PLpgSQL_function *compiled_functions = NULL;
* call this function for execution of PL/pgSQL procedures.
* ----------
*/
PG_FUNCTION_INFO_V1(plpgsql_call_handler);
Datum
plpgsql_call_handler(PG_FUNCTION_ARGS)
{

View File

@ -31,7 +31,7 @@
* ENHANCEMENTS, OR MODIFICATIONS.
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/pl/tcl/pltcl.c,v 1.29 2000/11/16 22:30:52 tgl Exp $
* $Header: /cvsroot/pgsql/src/pl/tcl/pltcl.c,v 1.30 2000/11/20 20:36:52 tgl Exp $
*
**********************************************************************/
@ -325,6 +325,7 @@ pltcl_init_load_unknown(void)
* call this function for execution of
* PL/Tcl procedures.
**********************************************************************/
PG_FUNCTION_INFO_V1(pltcl_call_handler);
/* keep non-static */
Datum
@ -371,6 +372,12 @@ pltcl_call_handler(PG_FUNCTION_ARGS)
return retval;
}
/*
* Alternate handler for unsafe functions
*/
PG_FUNCTION_INFO_V1(pltclu_call_handler);
/* keep non-static */
Datum
pltclu_call_handler(PG_FUNCTION_ARGS)

View File

@ -15,30 +15,30 @@ CREATE FUNCTION widget_out(opaque)
CREATE FUNCTION check_primary_key ()
RETURNS opaque
AS '@abs_builddir@/../../../contrib/spi/refint@DLSUFFIX@'
LANGUAGE 'newC';
LANGUAGE 'C';
CREATE FUNCTION check_foreign_key ()
RETURNS opaque
AS '@abs_builddir@/../../../contrib/spi/refint@DLSUFFIX@'
LANGUAGE 'newC';
LANGUAGE 'C';
CREATE FUNCTION autoinc ()
RETURNS opaque
AS '@abs_builddir@/../../../contrib/spi/autoinc@DLSUFFIX@'
LANGUAGE 'newC';
LANGUAGE 'C';
CREATE FUNCTION funny_dup17 ()
RETURNS opaque
AS '@abs_builddir@/regress@DLSUFFIX@'
LANGUAGE 'newC';
LANGUAGE 'C';
CREATE FUNCTION ttdummy ()
RETURNS opaque
AS '@abs_builddir@/regress@DLSUFFIX@'
LANGUAGE 'newC';
LANGUAGE 'C';
CREATE FUNCTION set_ttdummy (int4)
RETURNS int4
AS '@abs_builddir@/regress@DLSUFFIX@'
LANGUAGE 'newC';
LANGUAGE 'C';

View File

@ -30,28 +30,33 @@ CREATE FUNCTION user_relns()
CREATE FUNCTION pt_in_widget(point, widget)
RETURNS bool
AS '@abs_builddir@/regress@DLSUFFIX@'
LANGUAGE 'newC';
LANGUAGE 'C';
CREATE FUNCTION overpaid(emp)
RETURNS bool
AS '@abs_builddir@/regress@DLSUFFIX@'
LANGUAGE 'newC';
LANGUAGE 'C';
CREATE FUNCTION boxarea(box)
RETURNS float8
AS '@abs_builddir@/regress@DLSUFFIX@'
LANGUAGE 'newC';
LANGUAGE 'C';
CREATE FUNCTION interpt_pp(path, path)
RETURNS point
AS '@abs_builddir@/regress@DLSUFFIX@'
LANGUAGE 'newC';
LANGUAGE 'C';
CREATE FUNCTION reverse_name(name)
RETURNS name
AS '@abs_builddir@/regress@DLSUFFIX@'
LANGUAGE 'c';
CREATE FUNCTION oldstyle_length(int4, text)
RETURNS int4
AS '@abs_builddir@/regress@DLSUFFIX@'
LANGUAGE 'c';
--
-- Function dynamic loading
--

View File

@ -215,6 +215,19 @@ SELECT user_relns() AS user_relns
--SELECT name(equipment(hobby_construct(text 'skywalking', text 'mer'))) AS equip_name;
--
-- check that old-style C functions work properly with TOASTed values
--
create table oldstyle_test(i int4, t text);
insert into oldstyle_test values(null,null);
insert into oldstyle_test values(0,'12');
insert into oldstyle_test values(1000,'12');
insert into oldstyle_test values(0, repeat('x', 50000));
select i, length(t), octet_length(t), oldstyle_length(i,t) from oldstyle_test;
drop table oldstyle_test;
--
-- functional joins
--

View File

@ -13,24 +13,24 @@ CREATE FUNCTION widget_out(opaque)
CREATE FUNCTION check_primary_key ()
RETURNS opaque
AS '@abs_builddir@/../../../contrib/spi/refint@DLSUFFIX@'
LANGUAGE 'newC';
LANGUAGE 'C';
CREATE FUNCTION check_foreign_key ()
RETURNS opaque
AS '@abs_builddir@/../../../contrib/spi/refint@DLSUFFIX@'
LANGUAGE 'newC';
LANGUAGE 'C';
CREATE FUNCTION autoinc ()
RETURNS opaque
AS '@abs_builddir@/../../../contrib/spi/autoinc@DLSUFFIX@'
LANGUAGE 'newC';
LANGUAGE 'C';
CREATE FUNCTION funny_dup17 ()
RETURNS opaque
AS '@abs_builddir@/regress@DLSUFFIX@'
LANGUAGE 'newC';
LANGUAGE 'C';
CREATE FUNCTION ttdummy ()
RETURNS opaque
AS '@abs_builddir@/regress@DLSUFFIX@'
LANGUAGE 'newC';
LANGUAGE 'C';
CREATE FUNCTION set_ttdummy (int4)
RETURNS int4
AS '@abs_builddir@/regress@DLSUFFIX@'
LANGUAGE 'newC';
LANGUAGE 'C';

View File

@ -23,23 +23,27 @@ CREATE FUNCTION user_relns()
CREATE FUNCTION pt_in_widget(point, widget)
RETURNS bool
AS '@abs_builddir@/regress@DLSUFFIX@'
LANGUAGE 'newC';
LANGUAGE 'C';
CREATE FUNCTION overpaid(emp)
RETURNS bool
AS '@abs_builddir@/regress@DLSUFFIX@'
LANGUAGE 'newC';
LANGUAGE 'C';
CREATE FUNCTION boxarea(box)
RETURNS float8
AS '@abs_builddir@/regress@DLSUFFIX@'
LANGUAGE 'newC';
LANGUAGE 'C';
CREATE FUNCTION interpt_pp(path, path)
RETURNS point
AS '@abs_builddir@/regress@DLSUFFIX@'
LANGUAGE 'newC';
LANGUAGE 'C';
CREATE FUNCTION reverse_name(name)
RETURNS name
AS '@abs_builddir@/regress@DLSUFFIX@'
LANGUAGE 'c';
CREATE FUNCTION oldstyle_length(int4, text)
RETURNS int4
AS '@abs_builddir@/regress@DLSUFFIX@'
LANGUAGE 'c';
--
-- Function dynamic loading
--

View File

@ -657,6 +657,24 @@ SELECT user_relns() AS user_relns
--SELECT name(equipment(hobby_construct(text 'skywalking', text 'mer'))) AS equip_name;
--
-- check that old-style C functions work properly with TOASTed values
--
create table oldstyle_test(i int4, t text);
insert into oldstyle_test values(null,null);
insert into oldstyle_test values(0,'12');
insert into oldstyle_test values(1000,'12');
insert into oldstyle_test values(0, repeat('x', 50000));
select i, length(t), octet_length(t), oldstyle_length(i,t) from oldstyle_test;
i | length | octet_length | oldstyle_length
------+--------+--------------+-----------------
| | |
0 | 2 | 2 | 2
1000 | 2 | 2 | 1002
0 | 50000 | 581 | 50000
(4 rows)
drop table oldstyle_test;
--
-- functional joins
--
--

View File

@ -1,5 +1,5 @@
/*
* $Header: /cvsroot/pgsql/src/test/regress/regress.c,v 1.44 2000/08/24 23:34:11 tgl Exp $
* $Header: /cvsroot/pgsql/src/test/regress/regress.c,v 1.45 2000/11/20 20:36:53 tgl Exp $
*/
#include <float.h> /* faked on sunos */
@ -25,10 +25,13 @@ extern void regress_lseg_construct(LSEG *lseg, Point *pt1, Point *pt2);
extern Datum overpaid(PG_FUNCTION_ARGS);
extern Datum boxarea(PG_FUNCTION_ARGS);
extern char *reverse_name(char *string);
extern int oldstyle_length(int n, text *t);
/*
** Distance from a point to a path
*/
PG_FUNCTION_INFO_V1(regress_dist_ptpath);
Datum
regress_dist_ptpath(PG_FUNCTION_ARGS)
{
@ -69,6 +72,8 @@ regress_dist_ptpath(PG_FUNCTION_ARGS)
/* this essentially does a cartesian product of the lsegs in the
two paths, and finds the min distance between any two lsegs */
PG_FUNCTION_INFO_V1(regress_path_dist);
Datum
regress_path_dist(PG_FUNCTION_ARGS)
{
@ -129,6 +134,8 @@ POLYGON *poly;
}
/* return the point where two paths intersect, or NULL if no intersection. */
PG_FUNCTION_INFO_V1(interpt_pp);
Datum
interpt_pp(PG_FUNCTION_ARGS)
{
@ -182,6 +189,8 @@ Point *pt2;
lseg->m = point_sl(pt1, pt2);
}
PG_FUNCTION_INFO_V1(overpaid);
Datum
overpaid(PG_FUNCTION_ARGS)
{
@ -254,6 +263,8 @@ WIDGET *widget;
return result;
}
PG_FUNCTION_INFO_V1(pt_in_widget);
Datum
pt_in_widget(PG_FUNCTION_ARGS)
{
@ -265,6 +276,8 @@ pt_in_widget(PG_FUNCTION_ARGS)
#define ABS(X) ((X) >= 0 ? (X) : -(X))
PG_FUNCTION_INFO_V1(boxarea);
Datum
boxarea(PG_FUNCTION_ARGS)
{
@ -278,8 +291,7 @@ boxarea(PG_FUNCTION_ARGS)
}
char *
reverse_name(string)
char *string;
reverse_name(char *string)
{
int i;
int len;
@ -301,6 +313,20 @@ char *string;
return new_string;
}
/* This rather silly function is just to test that oldstyle functions
* work correctly on toast-able inputs.
*/
int
oldstyle_length(int n, text *t)
{
int len = 0;
if (t)
len = VARSIZE(t) - VARHDRSZ;
return n + len;
}
#include "executor/spi.h" /* this is what you need to work with SPI */
#include "commands/trigger.h" /* -"- and triggers */
@ -312,6 +338,8 @@ static bool fd17b_recursion = true;
static bool fd17a_recursion = true;
extern Datum funny_dup17(PG_FUNCTION_ARGS);
PG_FUNCTION_INFO_V1(funny_dup17);
Datum
funny_dup17(PG_FUNCTION_ARGS)
{
@ -428,6 +456,8 @@ extern Datum set_ttdummy(PG_FUNCTION_ARGS);
static void *splan = NULL;
static bool ttoff = false;
PG_FUNCTION_INFO_V1(ttdummy);
Datum
ttdummy(PG_FUNCTION_ARGS)
{
@ -625,6 +655,8 @@ ttdummy(PG_FUNCTION_ARGS)
return PointerGetDatum(rettuple);
}
PG_FUNCTION_INFO_V1(set_ttdummy);
Datum
set_ttdummy(PG_FUNCTION_ARGS)
{

View File

@ -38,6 +38,7 @@ DROP FUNCTION interpt_pp(path,path);
DROP FUNCTION reverse_name(name);
DROP FUNCTION oldstyle_length(int4, text);
--
-- OPERATOR REMOVAL

View File

@ -30,6 +30,8 @@ Datum c_overpaid(PG_FUNCTION_ARGS);
/* By Value */
PG_FUNCTION_INFO_V1(add_one);
Datum
add_one(PG_FUNCTION_ARGS)
{
@ -40,6 +42,8 @@ add_one(PG_FUNCTION_ARGS)
/* By Reference, Fixed Length */
PG_FUNCTION_INFO_V1(add_one_float8);
Datum
add_one_float8(PG_FUNCTION_ARGS)
{
@ -49,6 +53,8 @@ add_one_float8(PG_FUNCTION_ARGS)
PG_RETURN_FLOAT8(arg + 1.0);
}
PG_FUNCTION_INFO_V1(makepoint);
Datum
makepoint(PG_FUNCTION_ARGS)
{
@ -64,6 +70,8 @@ makepoint(PG_FUNCTION_ARGS)
/* By Reference, Variable Length */
PG_FUNCTION_INFO_V1(copytext);
Datum
copytext(PG_FUNCTION_ARGS)
{
@ -82,6 +90,8 @@ copytext(PG_FUNCTION_ARGS)
PG_RETURN_TEXT_P(new_t);
}
PG_FUNCTION_INFO_V1(concat_text);
Datum
concat_text(PG_FUNCTION_ARGS)
{
@ -99,6 +109,8 @@ concat_text(PG_FUNCTION_ARGS)
/* Composite types */
PG_FUNCTION_INFO_V1(c_overpaid);
Datum
c_overpaid(PG_FUNCTION_ARGS)
{