Convert oidvector and int2vector into variable-length arrays. This

change saves a great deal of space in pg_proc and its primary index, and it eliminates the former requirement that INDEX_MAX_KEYS and FUNC_MAX_ARGS have the same value. INDEX_MAX_KEYS is still embedded in the on-disk representation (because it affects index tuple header size), but FUNC_MAX_ARGS is not. I believe it would now be possible to increase FUNC_MAX_ARGS at little cost, but haven't experimented yet. There are still a lot of vestigial references to FUNC_MAX_ARGS, which I will clean up in a separate pass. However, getting rid of it altogether would require changing the FunctionCallInfoData struct, and I'm not sure I want to buy into that.
2025-11-10 17:42:29 +03:00 · 2005-03-29 00:17:27 +00:00
parent 119191609c
commit 70c9763d48
61 changed files with 819 additions and 581 deletions
--- a/src/backend/utils/adt/arrayfuncs.c
+++ b/src/backend/utils/adt/arrayfuncs.c
@@ -8,7 +8,7 @@
 *
 *
 * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/adt/arrayfuncs.c,v 1.117 2005/03/24 21:50:37 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/adt/arrayfuncs.c,v 1.118 2005/03/29 00:17:08 tgl Exp $
 *
 *-------------------------------------------------------------------------
 */
@@ -56,7 +56,7 @@
 *
 *
 * There are also some "fixed-length array" datatypes, such as NAME and
- * OIDVECTOR.  These are simply a sequence of a fixed number of items each
+ * POINT.  These are simply a sequence of a fixed number of items each
 * of a fixed-length datatype, with no overhead; the item size must be
 * a multiple of its alignment requirement, because we do no padding.
 * We support subscripting on these types, but array_in() and array_out()
--- a/src/backend/utils/adt/format_type.c
+++ b/src/backend/utils/adt/format_type.c
@@ -8,7 +8,7 @@
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/adt/format_type.c,v 1.39 2004/12/31 22:01:21 pgsql Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/adt/format_type.c,v 1.40 2005/03/29 00:17:08 tgl Exp $
 *
 *-------------------------------------------------------------------------
 */
@@ -140,12 +140,15 @@ format_type_internal(Oid type_oid, int32 typemod,
 	/*
 	 * Check if it's an array (and not a domain --- we don't want to show
 	 * the substructure of a domain type).	Fixed-length array types such
-	 * as "name" shouldn't get deconstructed either.
+	 * as "name" shouldn't get deconstructed either.  As of Postgres 8.1,
+	 * rather than checking typlen we check the toast property, and don't
+	 * deconstruct "plain storage" array types --- this is because we don't
+	 * want to show oidvector as oid[].
 	 */
 	array_base_type = typeform->typelem;

 	if (array_base_type != InvalidOid &&
-		typeform->typlen == -1 &&
+		typeform->typstorage != 'p' &&
 		typeform->typtype != 'd')
 	{
 		/* Switch our attention to the array element type */
@@ -459,29 +462,17 @@ type_maximum_size(Oid type_oid, int32 typemod)

 /*
 * oidvectortypes			- converts a vector of type OIDs to "typname" list
- *
- * The interface for this function is wrong: it should be told how many
- * OIDs are significant in the input vector, so that trailing InvalidOid
- * argument types can be recognized.
 */
 Datum
 oidvectortypes(PG_FUNCTION_ARGS)
 {
-	Oid		   *oidArray = (Oid *) PG_GETARG_POINTER(0);
+	oidvector  *oidArray = (oidvector *) PG_GETARG_POINTER(0);
 	char	   *result;
-	int			numargs;
+	int			numargs = oidArray->dim1;
 	int			num;
 	size_t		total;
 	size_t		left;

-	/* Try to guess how many args there are :-( */
-	numargs = 0;
-	for (num = 0; num < FUNC_MAX_ARGS; num++)
-	{
-		if (oidArray[num] != InvalidOid)
-			numargs = num + 1;
-	}
-
 	total = 20 * numargs + 1;
 	result = palloc(total);
 	result[0] = '\0';
@@ -489,7 +480,7 @@ oidvectortypes(PG_FUNCTION_ARGS)

 	for (num = 0; num < numargs; num++)
 	{
-		char	   *typename = format_type_internal(oidArray[num], -1,
+		char	   *typename = format_type_internal(oidArray->values[num], -1,
 													false, true);
 		size_t		slen = strlen(typename);

--- a/src/backend/utils/adt/int.c
+++ b/src/backend/utils/adt/int.c
@@ -8,7 +8,7 @@
 *
 *
 * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/adt/int.c,v 1.65 2005/02/27 08:31:30 neilc Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/adt/int.c,v 1.66 2005/03/29 00:17:08 tgl Exp $
 *
 *-------------------------------------------------------------------------
 */
@@ -33,8 +33,10 @@
 #include <ctype.h>
 #include <limits.h>

+#include "catalog/pg_type.h"
 #include "funcapi.h"
 #include "libpq/pqformat.h"
+#include "utils/array.h"
 #include "utils/builtins.h"


@@ -47,6 +49,8 @@

 #define SAMESIGN(a,b)	(((a) < 0) == ((b) < 0))

+#define Int2VectorSize(n)	(offsetof(int2vector, values) + (n) * sizeof(int2))
+
 typedef struct
 {
 	int32		current;
@@ -109,20 +113,49 @@ int2send(PG_FUNCTION_ARGS)
 }

 /*
- *		int2vectorin			- converts "num num ..." to internal form
+ * construct int2vector given a raw array of int2s
 *
- *		Note: Fills any missing slots with zeroes.
+ * If int2s is NULL then caller must fill values[] afterward
+ */
+int2vector *
+buildint2vector(const int2 *int2s, int n)
+{
+	int2vector  *result;
+
+	result = (int2vector *) palloc0(Int2VectorSize(n));
+
+	if (n > 0 && int2s)
+		memcpy(result->values, int2s, n * sizeof(int2));
+
+	/*
+	 * Attach standard array header.  For historical reasons, we set the
+	 * index lower bound to 0 not 1.
+	 */
+	result->size = Int2VectorSize(n);
+	result->ndim = 1;
+	result->flags = 0;
+	result->elemtype = INT2OID;
+	result->dim1 = n;
+	result->lbound1 = 0;
+
+	return result;
+}
+
+/*
+ *		int2vectorin			- converts "num num ..." to internal form
 */
 Datum
 int2vectorin(PG_FUNCTION_ARGS)
 {
 	char	   *intString = PG_GETARG_CSTRING(0);
-	int16	   *result = (int16 *) palloc(sizeof(int16[INDEX_MAX_KEYS]));
-	int			slot;
+	int2vector *result;
+	int			n;

-	for (slot = 0; *intString && slot < INDEX_MAX_KEYS; slot++)
+	result = (int2vector *) palloc0(Int2VectorSize(FUNC_MAX_ARGS));
+
+	for (n = 0; *intString && n < FUNC_MAX_ARGS; n++)
 	{
-		if (sscanf(intString, "%hd", &result[slot]) != 1)
+		if (sscanf(intString, "%hd", &result->values[n]) != 1)
 			break;
 		while (*intString && isspace((unsigned char) *intString))
 			intString++;
@@ -136,8 +169,12 @@ int2vectorin(PG_FUNCTION_ARGS)
 				(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
 				 errmsg("int2vector has too many elements")));

-	while (slot < INDEX_MAX_KEYS)
-		result[slot++] = 0;
+	result->size = Int2VectorSize(n);
+	result->ndim = 1;
+	result->flags = 0;
+	result->elemtype = INT2OID;
+	result->dim1 = n;
+	result->lbound1 = 0;

 	PG_RETURN_POINTER(result);
 }
@@ -148,24 +185,19 @@ int2vectorin(PG_FUNCTION_ARGS)
 Datum
 int2vectorout(PG_FUNCTION_ARGS)
 {
-	int16	   *int2Array = (int16 *) PG_GETARG_POINTER(0);
+	int2vector *int2Array = (int2vector *) PG_GETARG_POINTER(0);
 	int			num,
-				maxnum;
+				nnums = int2Array->dim1;
 	char	   *rp;
 	char	   *result;

-	/* find last non-zero value in vector */
-	for (maxnum = INDEX_MAX_KEYS - 1; maxnum >= 0; maxnum--)
-		if (int2Array[maxnum] != 0)
-			break;
-
 	/* assumes sign, 5 digits, ' ' */
-	rp = result = (char *) palloc((maxnum + 1) * 7 + 1);
-	for (num = 0; num <= maxnum; num++)
+	rp = result = (char *) palloc(nnums * 7 + 1);
+	for (num = 0; num < nnums; num++)
 	{
 		if (num != 0)
 			*rp++ = ' ';
-		pg_itoa(int2Array[num], rp);
+		pg_itoa(int2Array->values[num], rp);
 		while (*++rp != '\0')
 			;
 	}
@@ -180,11 +212,19 @@ Datum
 int2vectorrecv(PG_FUNCTION_ARGS)
 {
 	StringInfo	buf = (StringInfo) PG_GETARG_POINTER(0);
-	int16	   *result = (int16 *) palloc(sizeof(int16[INDEX_MAX_KEYS]));
-	int			slot;
+	int2vector  *result;

-	for (slot = 0; slot < INDEX_MAX_KEYS; slot++)
-		result[slot] = (int16) pq_getmsgint(buf, sizeof(int16));
+	result = (int2vector *)
+		DatumGetPointer(DirectFunctionCall2(array_recv,
+											PointerGetDatum(buf),
+											ObjectIdGetDatum(INT2OID)));
+	/* sanity checks: int2vector must be 1-D, no nulls */
+	if (result->ndim != 1 ||
+		result->flags != 0 ||
+		result->elemtype != INT2OID)
+		ereport(ERROR,
+				(errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
+				 errmsg("invalid int2vector data")));
 	PG_RETURN_POINTER(result);
 }

@@ -194,14 +234,7 @@ int2vectorrecv(PG_FUNCTION_ARGS)
 Datum
 int2vectorsend(PG_FUNCTION_ARGS)
 {
-	int16	   *int2Array = (int16 *) PG_GETARG_POINTER(0);
-	StringInfoData buf;
-	int			slot;
-
-	pq_begintypsend(&buf);
-	for (slot = 0; slot < INDEX_MAX_KEYS; slot++)
-		pq_sendint(&buf, int2Array[slot], sizeof(int16));
-	PG_RETURN_BYTEA_P(pq_endtypsend(&buf));
+	return array_send(fcinfo);
 }

 /*
@@ -211,10 +244,12 @@ int2vectorsend(PG_FUNCTION_ARGS)
 Datum
 int2vectoreq(PG_FUNCTION_ARGS)
 {
-	int16	   *arg1 = (int16 *) PG_GETARG_POINTER(0);
-	int16	   *arg2 = (int16 *) PG_GETARG_POINTER(1);
+	int2vector *a = (int2vector *) PG_GETARG_POINTER(0);
+	int2vector *b = (int2vector *) PG_GETARG_POINTER(1);

-	PG_RETURN_BOOL(memcmp(arg1, arg2, INDEX_MAX_KEYS * sizeof(int16)) == 0);
+	if (a->dim1 != b->dim1)
+		PG_RETURN_BOOL(false);
+	PG_RETURN_BOOL(memcmp(a->values, b->values, a->dim1 * sizeof(int2)) == 0);
 }


--- a/src/backend/utils/adt/oid.c
+++ b/src/backend/utils/adt/oid.c
@@ -8,20 +8,24 @@
 *
 *
 * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/adt/oid.c,v 1.61 2005/02/11 04:08:58 neilc Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/adt/oid.c,v 1.62 2005/03/29 00:17:08 tgl Exp $
 *
 *-------------------------------------------------------------------------
 */
 #include "postgres.h"

 #include <ctype.h>
-#include <errno.h>
 #include <limits.h>

+#include "catalog/pg_type.h"
 #include "libpq/pqformat.h"
+#include "utils/array.h"
 #include "utils/builtins.h"


+#define OidVectorSize(n)	(offsetof(oidvector, values) + (n) * sizeof(Oid))
+
+
 /*****************************************************************************
 *	 USER I/O ROUTINES														 *
 *****************************************************************************/
@@ -151,27 +155,54 @@ oidsend(PG_FUNCTION_ARGS)
 	PG_RETURN_BYTEA_P(pq_endtypsend(&buf));
 }

+/*
+ * construct oidvector given a raw array of Oids
+ *
+ * If oids is NULL then caller must fill values[] afterward
+ */
+oidvector *
+buildoidvector(const Oid *oids, int n)
+{
+	oidvector  *result;
+
+	result = (oidvector *) palloc0(OidVectorSize(n));
+
+	if (n > 0 && oids)
+		memcpy(result->values, oids, n * sizeof(Oid));
+
+	/*
+	 * Attach standard array header.  For historical reasons, we set the
+	 * index lower bound to 0 not 1.
+	 */
+	result->size = OidVectorSize(n);
+	result->ndim = 1;
+	result->flags = 0;
+	result->elemtype = OIDOID;
+	result->dim1 = n;
+	result->lbound1 = 0;
+
+	return result;
+}

 /*
 *		oidvectorin			- converts "num num ..." to internal form
- *
- *		Note:
- *				Fills any unsupplied positions with InvalidOid.
 */
 Datum
 oidvectorin(PG_FUNCTION_ARGS)
 {
 	char	   *oidString = PG_GETARG_CSTRING(0);
-	Oid		   *result = (Oid *) palloc(sizeof(Oid[INDEX_MAX_KEYS]));
-	int			slot;
+	oidvector  *result;
+	int			n;

-	for (slot = 0; slot < INDEX_MAX_KEYS; slot++)
+	result = (oidvector *) palloc0(OidVectorSize(FUNC_MAX_ARGS));
+
+	for (n = 0; n < FUNC_MAX_ARGS; n++)
 	{
 		while (*oidString && isspace((unsigned char) *oidString))
 			oidString++;
 		if (*oidString == '\0')
 			break;
-		result[slot] = oidin_subr("oidvectorin", oidString, &oidString);
+		result->values[n] = oidin_subr("oidvectorin", oidString, &oidString);
 	}
 	while (*oidString && isspace((unsigned char) *oidString))
 		oidString++;
@@ -179,8 +210,13 @@ oidvectorin(PG_FUNCTION_ARGS)
 		ereport(ERROR,
 				(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
 				 errmsg("oidvector has too many elements")));
-	while (slot < INDEX_MAX_KEYS)
-		result[slot++] = InvalidOid;
+
+	result->size = OidVectorSize(n);
+	result->ndim = 1;
+	result->flags = 0;
+	result->elemtype = OIDOID;
+	result->dim1 = n;
+	result->lbound1 = 0;

 	PG_RETURN_POINTER(result);
 }
@@ -191,24 +227,19 @@ oidvectorin(PG_FUNCTION_ARGS)
 Datum
 oidvectorout(PG_FUNCTION_ARGS)
 {
-	Oid		   *oidArray = (Oid *) PG_GETARG_POINTER(0);
+	oidvector  *oidArray = (oidvector *) PG_GETARG_POINTER(0);
 	int			num,
-				maxnum;
+				nnums = oidArray->dim1;
 	char	   *rp;
 	char	   *result;

-	/* find last non-zero value in vector */
-	for (maxnum = INDEX_MAX_KEYS - 1; maxnum >= 0; maxnum--)
-		if (oidArray[maxnum] != 0)
-			break;
-
 	/* assumes sign, 10 digits, ' ' */
-	rp = result = (char *) palloc((maxnum + 1) * 12 + 1);
-	for (num = 0; num <= maxnum; num++)
+	rp = result = (char *) palloc(nnums * 12 + 1);
+	for (num = 0; num < nnums; num++)
 	{
 		if (num != 0)
 			*rp++ = ' ';
-		sprintf(rp, "%u", oidArray[num]);
+		sprintf(rp, "%u", oidArray->values[num]);
 		while (*++rp != '\0')
 			;
 	}
@@ -223,11 +254,19 @@ Datum
 oidvectorrecv(PG_FUNCTION_ARGS)
 {
 	StringInfo	buf = (StringInfo) PG_GETARG_POINTER(0);
-	Oid		   *result = (Oid *) palloc(sizeof(Oid[INDEX_MAX_KEYS]));
-	int			slot;
+	oidvector  *result;

-	for (slot = 0; slot < INDEX_MAX_KEYS; slot++)
-		result[slot] = (Oid) pq_getmsgint(buf, sizeof(Oid));
+	result = (oidvector *)
+		DatumGetPointer(DirectFunctionCall2(array_recv,
+											PointerGetDatum(buf),
+											ObjectIdGetDatum(OIDOID)));
+	/* sanity checks: oidvector must be 1-D, no nulls */
+	if (result->ndim != 1 ||
+		result->flags != 0 ||
+		result->elemtype != OIDOID)
+		ereport(ERROR,
+				(errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
+				 errmsg("invalid oidvector data")));
 	PG_RETURN_POINTER(result);
 }

@@ -237,14 +276,7 @@ oidvectorrecv(PG_FUNCTION_ARGS)
 Datum
 oidvectorsend(PG_FUNCTION_ARGS)
 {
-	Oid		   *oidArray = (Oid *) PG_GETARG_POINTER(0);
-	StringInfoData buf;
-	int			slot;
-
-	pq_begintypsend(&buf);
-	for (slot = 0; slot < INDEX_MAX_KEYS; slot++)
-		pq_sendint(&buf, oidArray[slot], sizeof(Oid));
-	PG_RETURN_BYTEA_P(pq_endtypsend(&buf));
+	return array_send(fcinfo);
 }


@@ -327,71 +359,49 @@ oidsmaller(PG_FUNCTION_ARGS)
 Datum
 oidvectoreq(PG_FUNCTION_ARGS)
 {
-	Oid		   *arg1 = (Oid *) PG_GETARG_POINTER(0);
-	Oid		   *arg2 = (Oid *) PG_GETARG_POINTER(1);
+	int32		cmp = DatumGetInt32(btoidvectorcmp(fcinfo));

-	PG_RETURN_BOOL(memcmp(arg1, arg2, INDEX_MAX_KEYS * sizeof(Oid)) == 0);
+	PG_RETURN_BOOL(cmp == 0);
 }

 Datum
 oidvectorne(PG_FUNCTION_ARGS)
 {
-	Oid		   *arg1 = (Oid *) PG_GETARG_POINTER(0);
-	Oid		   *arg2 = (Oid *) PG_GETARG_POINTER(1);
+	int32		cmp = DatumGetInt32(btoidvectorcmp(fcinfo));

-	PG_RETURN_BOOL(memcmp(arg1, arg2, INDEX_MAX_KEYS * sizeof(Oid)) != 0);
+	PG_RETURN_BOOL(cmp != 0);
 }

 Datum
 oidvectorlt(PG_FUNCTION_ARGS)
 {
-	Oid		   *arg1 = (Oid *) PG_GETARG_POINTER(0);
-	Oid		   *arg2 = (Oid *) PG_GETARG_POINTER(1);
-	int			i;
+	int32		cmp = DatumGetInt32(btoidvectorcmp(fcinfo));

-	for (i = 0; i < INDEX_MAX_KEYS; i++)
-		if (arg1[i] != arg2[i])
-			PG_RETURN_BOOL(arg1[i] < arg2[i]);
-	PG_RETURN_BOOL(false);
+	PG_RETURN_BOOL(cmp < 0);
 }

 Datum
 oidvectorle(PG_FUNCTION_ARGS)
 {
-	Oid		   *arg1 = (Oid *) PG_GETARG_POINTER(0);
-	Oid		   *arg2 = (Oid *) PG_GETARG_POINTER(1);
-	int			i;
+	int32		cmp = DatumGetInt32(btoidvectorcmp(fcinfo));

-	for (i = 0; i < INDEX_MAX_KEYS; i++)
-		if (arg1[i] != arg2[i])
-			PG_RETURN_BOOL(arg1[i] <= arg2[i]);
-	PG_RETURN_BOOL(true);
+	PG_RETURN_BOOL(cmp <= 0);
 }

 Datum
 oidvectorge(PG_FUNCTION_ARGS)
 {
-	Oid		   *arg1 = (Oid *) PG_GETARG_POINTER(0);
-	Oid		   *arg2 = (Oid *) PG_GETARG_POINTER(1);
-	int			i;
+	int32		cmp = DatumGetInt32(btoidvectorcmp(fcinfo));

-	for (i = 0; i < INDEX_MAX_KEYS; i++)
-		if (arg1[i] != arg2[i])
-			PG_RETURN_BOOL(arg1[i] >= arg2[i]);
-	PG_RETURN_BOOL(true);
+	PG_RETURN_BOOL(cmp >= 0);
 }

 Datum
 oidvectorgt(PG_FUNCTION_ARGS)
 {
-	Oid		   *arg1 = (Oid *) PG_GETARG_POINTER(0);
-	Oid		   *arg2 = (Oid *) PG_GETARG_POINTER(1);
-	int			i;
+	int32		cmp = DatumGetInt32(btoidvectorcmp(fcinfo));

-	for (i = 0; i < INDEX_MAX_KEYS; i++)
-		if (arg1[i] != arg2[i])
-			PG_RETURN_BOOL(arg1[i] > arg2[i]);
-	PG_RETURN_BOOL(false);
+	PG_RETURN_BOOL(cmp > 0);
 }

 Datum
--- a/src/backend/utils/adt/regproc.c
+++ b/src/backend/utils/adt/regproc.c
@@ -13,7 +13,7 @@
 *
 *
 * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/adt/regproc.c,v 1.92 2004/12/31 22:01:22 pgsql Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/adt/regproc.c,v 1.93 2005/03/29 00:17:08 tgl Exp $
 *
 *-------------------------------------------------------------------------
 */
@@ -98,7 +98,7 @@ regprocin(PG_FUNCTION_ARGS)
 					CStringGetDatum(pro_name_or_oid));

 		hdesc = heap_openr(ProcedureRelationName, AccessShareLock);
-		sysscan = systable_beginscan(hdesc, ProcedureNameNspIndex, true,
+		sysscan = systable_beginscan(hdesc, ProcedureNameArgsNspIndex, true,
 									 SnapshotNow, 1, skey);

 		while (HeapTupleIsValid(tuple = systable_getnext(sysscan)))
@@ -336,7 +336,7 @@ format_procedure(Oid procedure_oid)
 						 quote_qualified_identifier(nspname, proname));
 		for (i = 0; i < nargs; i++)
 		{
-			Oid			thisargtype = procform->proargtypes[i];
+			Oid			thisargtype = procform->proargtypes.values[i];

 			if (i > 0)
 				appendStringInfoChar(&buf, ',');
--- a/src/backend/utils/adt/ruleutils.c
+++ b/src/backend/utils/adt/ruleutils.c
@@ -3,7 +3,7 @@
 *				back to source text
 *
 * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/adt/ruleutils.c,v 1.188 2005/01/13 17:19:10 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/adt/ruleutils.c,v 1.189 2005/03/29 00:17:08 tgl Exp $
 *
 *	  This software is copyrighted by Jan Wieck - Hamburg.
 *
@@ -553,9 +553,10 @@ pg_get_triggerdef(PG_FUNCTION_ARGS)
 		char	   *p;
 		int			i;

-		val = (bytea *) fastgetattr(ht_trig,
-									Anum_pg_trigger_tgargs,
-									tgrel->rd_att, &isnull);
+		val = (bytea *)
+			DatumGetPointer(fastgetattr(ht_trig,
+										Anum_pg_trigger_tgargs,
+										tgrel->rd_att, &isnull));
 		if (isnull)
 			elog(ERROR, "tgargs is null for trigger %u", trigid);
 		p = (char *) VARDATA(val);
@@ -637,6 +638,9 @@ pg_get_indexdef_worker(Oid indexrelid, int colno, int prettyFlags)
 	Oid			indrelid;
 	int			keyno;
 	Oid			keycoltype;
+	Datum		indclassDatum;
+	bool		isnull;
+	oidvector  *indclass;
 	StringInfoData buf;
 	char	   *str;
 	char	   *sep;
@@ -654,6 +658,12 @@ pg_get_indexdef_worker(Oid indexrelid, int colno, int prettyFlags)
 	indrelid = idxrec->indrelid;
 	Assert(indexrelid == idxrec->indexrelid);

+	/* Must get indclass the hard way */
+	indclassDatum = SysCacheGetAttr(INDEXRELID, ht_idx,
+									Anum_pg_index_indclass, &isnull);
+	Assert(!isnull);
+	indclass = (oidvector *) DatumGetPointer(indclassDatum);
+
 	/*
 	 * Fetch the pg_class tuple of the index relation
 	 */
@@ -720,7 +730,7 @@ pg_get_indexdef_worker(Oid indexrelid, int colno, int prettyFlags)
 	sep = "";
 	for (keyno = 0; keyno < idxrec->indnatts; keyno++)
 	{
-		AttrNumber	attnum = idxrec->indkey[keyno];
+		AttrNumber	attnum = idxrec->indkey.values[keyno];

 		if (!colno)
 			appendStringInfo(&buf, sep);
@@ -764,7 +774,7 @@ pg_get_indexdef_worker(Oid indexrelid, int colno, int prettyFlags)
 		 * Add the operator class name
 		 */
 		if (!colno)
-			get_opclass_name(idxrec->indclass[keyno], keycoltype,
+			get_opclass_name(indclass->values[keyno], keycoltype,
 							 &buf);
 	}

@@ -3537,7 +3547,10 @@ get_func_expr(FuncExpr *expr, deparse_context *context,
 	nargs = 0;
 	foreach(l, expr->args)
 	{
-		Assert(nargs < FUNC_MAX_ARGS);
+		if (nargs >= FUNC_MAX_ARGS)
+			ereport(ERROR,
+					(errcode(ERRCODE_TOO_MANY_ARGUMENTS),
+					 errmsg("too many arguments")));
 		argtypes[nargs] = exprType((Node *) lfirst(l));
 		nargs++;
 	}
--- a/src/backend/utils/cache/lsyscache.c
+++ b/src/backend/utils/cache/lsyscache.c
@@ -7,7 +7,7 @@
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/cache/lsyscache.c,v 1.120 2005/01/27 23:36:12 neilc Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/cache/lsyscache.c,v 1.121 2005/03/29 00:17:11 tgl Exp $
 *
 * NOTES
 *	  Eventually, the index information should go through here, too.
@@ -773,15 +773,36 @@ get_func_rettype(Oid funcid)
 	return result;
 }

+/*
+ * get_func_nargs
+ *		Given procedure id, return the number of arguments.
+ */
+int
+get_func_nargs(Oid funcid)
+{
+	HeapTuple	tp;
+	int			result;
+
+	tp = SearchSysCache(PROCOID,
+						ObjectIdGetDatum(funcid),
+						0, 0, 0);
+	if (!HeapTupleIsValid(tp))
+		elog(ERROR, "cache lookup failed for function %u", funcid);
+
+	result = ((Form_pg_proc) GETSTRUCT(tp))->pronargs;
+	ReleaseSysCache(tp);
+	return result;
+}
+
 /*
 * get_func_signature
 *		Given procedure id, return the function's argument and result types.
 *		(The return value is the result type.)
 *
- * argtypes must point to a vector of size FUNC_MAX_ARGS.
+ * The arguments are returned as a palloc'd array.
 */
 Oid
-get_func_signature(Oid funcid, Oid *argtypes, int *nargs)
+get_func_signature(Oid funcid, Oid **argtypes, int *nargs)
 {
 	HeapTuple	tp;
 	Form_pg_proc procstruct;
@@ -796,8 +817,10 @@ get_func_signature(Oid funcid, Oid *argtypes, int *nargs)
 	procstruct = (Form_pg_proc) GETSTRUCT(tp);

 	result = procstruct->prorettype;
-	memcpy(argtypes, procstruct->proargtypes, FUNC_MAX_ARGS * sizeof(Oid));
 	*nargs = (int) procstruct->pronargs;
+	Assert(*nargs == procstruct->proargtypes.dim1);
+	*argtypes = (Oid *) palloc(*nargs * sizeof(Oid));
+	memcpy(*argtypes, procstruct->proargtypes.values, *nargs * sizeof(Oid));

 	ReleaseSysCache(tp);
 	return result;
--- a/src/backend/utils/cache/relcache.c
+++ b/src/backend/utils/cache/relcache.c
@@ -8,7 +8,7 @@
 *
 *
 * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/cache/relcache.c,v 1.217 2005/03/28 00:58:26 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/cache/relcache.c,v 1.218 2005/03/29 00:17:11 tgl Exp $
 *
 *-------------------------------------------------------------------------
 */
@@ -27,7 +27,6 @@
 */
 #include "postgres.h"

-#include <errno.h>
 #include <sys/file.h>
 #include <fcntl.h>
 #include <unistd.h>
@@ -81,6 +80,7 @@ static FormData_pg_attribute Desc_pg_class[Natts_pg_class] = {Schema_pg_class};
 static FormData_pg_attribute Desc_pg_attribute[Natts_pg_attribute] = {Schema_pg_attribute};
 static FormData_pg_attribute Desc_pg_proc[Natts_pg_proc] = {Schema_pg_proc};
 static FormData_pg_attribute Desc_pg_type[Natts_pg_type] = {Schema_pg_type};
+static FormData_pg_attribute Desc_pg_index[Natts_pg_index] = {Schema_pg_index};

 /*
 *		Hash tables that index the relation cache
@@ -267,10 +267,11 @@ static void RelationBuildTupleDesc(RelationBuildDescInfo buildinfo,
 static Relation RelationBuildDesc(RelationBuildDescInfo buildinfo,
 				  Relation oldrelation);
 static void RelationInitPhysicalAddr(Relation relation);
+static TupleDesc GetPgIndexDescriptor(void);
 static void AttrDefaultFetch(Relation relation);
 static void CheckConstraintFetch(Relation relation);
 static List *insert_ordered_oid(List *list, Oid datum);
-static void IndexSupportInitialize(Form_pg_index iform,
+static void IndexSupportInitialize(oidvector *indclass,
 					   Oid *indexOperator,
 					   RegProcedure *indexSupport,
 					   StrategyNumber maxStrategyNumber,
@@ -918,6 +919,8 @@ RelationInitIndexAccessInfo(Relation relation)
 {
 	HeapTuple	tuple;
 	Form_pg_am	aform;
+	Datum		indclassDatum;
+	bool		isnull;
 	MemoryContext indexcxt;
 	MemoryContext oldcontext;
 	Oid		   *operator;
@@ -945,6 +948,18 @@ RelationInitIndexAccessInfo(Relation relation)
 	MemoryContextSwitchTo(oldcontext);
 	ReleaseSysCache(tuple);

+	/*
+	 * indclass cannot be referenced directly through the C struct, because
+	 * it is after the variable-width indkey field.  Therefore we extract
+	 * the datum the hard way and provide a direct link in the relcache.
+	 */
+	indclassDatum = fastgetattr(relation->rd_indextuple,
+								Anum_pg_index_indclass,
+								GetPgIndexDescriptor(),
+								&isnull);
+	Assert(!isnull);
+	relation->rd_indclass = (oidvector *) DatumGetPointer(indclassDatum);
+
 	/*
 	 * Make a copy of the pg_am entry for the index's access method
 	 */
@@ -1014,7 +1029,7 @@ RelationInitIndexAccessInfo(Relation relation)
 	 * Fill the operator and support procedure OID arrays. (supportinfo is
 	 * left as zeroes, and is filled on-the-fly when used)
 	 */
-	IndexSupportInitialize(relation->rd_index,
+	IndexSupportInitialize(relation->rd_indclass,
 						   operator, support,
 						   amstrategies, amsupport, natts);

@@ -1028,7 +1043,7 @@ RelationInitIndexAccessInfo(Relation relation)
 /*
 * IndexSupportInitialize
 *		Initializes an index's cached opclass information,
- *		given the index's pg_index tuple.
+ *		given the index's pg_index.indclass entry.
 *
 * Data is returned into *indexOperator and *indexSupport, which are arrays
 * allocated by the caller.
@@ -1040,7 +1055,7 @@ RelationInitIndexAccessInfo(Relation relation)
 * access method.
 */
 static void
-IndexSupportInitialize(Form_pg_index iform,
+IndexSupportInitialize(oidvector *indclass,
 					   Oid *indexOperator,
 					   RegProcedure *indexSupport,
 					   StrategyNumber maxStrategyNumber,
@@ -1049,19 +1064,15 @@ IndexSupportInitialize(Form_pg_index iform,
 {
 	int			attIndex;

-	/*
-	 * XXX note that the following assumes the INDEX tuple is well formed
-	 * and that the *key and *class are 0 terminated.
-	 */
 	for (attIndex = 0; attIndex < maxAttributeNumber; attIndex++)
 	{
 		OpClassCacheEnt *opcentry;

-		if (!OidIsValid(iform->indclass[attIndex]))
+		if (!OidIsValid(indclass->values[attIndex]))
 			elog(ERROR, "bogus pg_index tuple");

 		/* look up the info for this opclass, using a cache */
-		opcentry = LookupOpclassInfo(iform->indclass[attIndex],
+		opcentry = LookupOpclassInfo(indclass->values[attIndex],
 									 maxStrategyNumber,
 									 maxSupportNumber);

@@ -2479,6 +2490,53 @@ RelationCacheInitializePhase3(void)
 	}
 }

+/*
+ * GetPgIndexDescriptor -- get a predefined tuple descriptor for pg_index
+ *
+ * We need this kluge because we have to be able to access non-fixed-width
+ * fields of pg_index before we have the standard catalog caches available.
+ * We use predefined data that's set up in just the same way as the
+ * bootstrapped reldescs used by formrdesc().  The resulting tupdesc is
+ * not 100% kosher: it does not have the correct relation OID in attrelid,
+ * nor does it have a TupleConstr field.  But it's good enough for the
+ * purpose of extracting fields.
+ */
+static TupleDesc
+GetPgIndexDescriptor(void)
+{
+	static TupleDesc pgindexdesc = NULL;
+	MemoryContext oldcxt;
+	int			i;
+
+	/* Already done? */
+	if (pgindexdesc)
+		return pgindexdesc;
+
+	oldcxt = MemoryContextSwitchTo(CacheMemoryContext);
+
+	pgindexdesc = CreateTemplateTupleDesc(Natts_pg_index, false);
+	pgindexdesc->tdtypeid = RECORDOID; /* not right, but we don't care */
+	pgindexdesc->tdtypmod = -1;
+
+	for (i = 0; i < Natts_pg_index; i++)
+	{
+		memcpy(pgindexdesc->attrs[i],
+			   &Desc_pg_index[i],
+			   ATTRIBUTE_TUPLE_SIZE);
+		/* make sure attcacheoff is valid */
+		pgindexdesc->attrs[i]->attcacheoff = -1;
+	}
+
+	/* initialize first attribute's attcacheoff, cf RelationBuildTupleDesc */
+	pgindexdesc->attrs[0]->attcacheoff = 0;
+
+	/* Note: we don't bother to set up a TupleConstr entry */
+
+	MemoryContextSwitchTo(oldcxt);
+
+	return pgindexdesc;
+}
+
 static void
 AttrDefaultFetch(Relation relation)
 {
@@ -2773,15 +2831,11 @@ RelationGetIndexExpressions(Relation relation)
 	 * After successfully completing the work, we copy it into the
 	 * relcache entry.	This avoids problems if we get some sort of error
 	 * partway through.
-	 *
-	 * We make use of the syscache's copy of pg_index's tupledesc to access
-	 * the non-fixed fields of the tuple.  We assume that the syscache
-	 * will be initialized before any access of a partial index could
-	 * occur.  (This would probably fail if we were to allow partial
-	 * indexes on system catalogs.)
 	 */
-	exprsDatum = SysCacheGetAttr(INDEXRELID, relation->rd_indextuple,
-								 Anum_pg_index_indexprs, &isnull);
+	exprsDatum = heap_getattr(relation->rd_indextuple,
+							  Anum_pg_index_indexprs,
+							  GetPgIndexDescriptor(),
+							  &isnull);
 	Assert(!isnull);
 	exprsString = DatumGetCString(DirectFunctionCall1(textout, exprsDatum));
 	result = (List *) stringToNode(exprsString);
@@ -2845,15 +2899,11 @@ RelationGetIndexPredicate(Relation relation)
 	 * After successfully completing the work, we copy it into the
 	 * relcache entry.	This avoids problems if we get some sort of error
 	 * partway through.
-	 *
-	 * We make use of the syscache's copy of pg_index's tupledesc to access
-	 * the non-fixed fields of the tuple.  We assume that the syscache
-	 * will be initialized before any access of a partial index could
-	 * occur.  (This would probably fail if we were to allow partial
-	 * indexes on system catalogs.)
 	 */
-	predDatum = SysCacheGetAttr(INDEXRELID, relation->rd_indextuple,
-								Anum_pg_index_indpred, &isnull);
+	predDatum = heap_getattr(relation->rd_indextuple,
+							 Anum_pg_index_indpred,
+							 GetPgIndexDescriptor(),
+							 &isnull);
 	Assert(!isnull);
 	predString = DatumGetCString(DirectFunctionCall1(textout, predDatum));
 	result = (List *) stringToNode(predString);
@@ -2990,6 +3040,8 @@ load_relcache_init_file(void)
 		Relation	rel;
 		Form_pg_class relform;
 		bool		has_not_null;
+		Datum		indclassDatum;
+		bool		isnull;

 		/* first read the relation descriptor length */
 		if ((nread = fread(&len, 1, sizeof(len), fp)) != sizeof(len))
@@ -3081,6 +3133,14 @@ load_relcache_init_file(void)
 			rel->rd_indextuple->t_data = (HeapTupleHeader) ((char *) rel->rd_indextuple + HEAPTUPLESIZE);
 			rel->rd_index = (Form_pg_index) GETSTRUCT(rel->rd_indextuple);

+			/* fix up indclass pointer too */
+			indclassDatum = fastgetattr(rel->rd_indextuple,
+										Anum_pg_index_indclass,
+										GetPgIndexDescriptor(),
+										&isnull);
+			Assert(!isnull);
+			rel->rd_indclass = (oidvector *) DatumGetPointer(indclassDatum);
+
 			/* next, read the access method tuple form */
 			if ((nread = fread(&len, 1, sizeof(len), fp)) != sizeof(len))
 				goto read_failed;
@@ -3133,6 +3193,7 @@ load_relcache_init_file(void)

 			Assert(rel->rd_index == NULL);
 			Assert(rel->rd_indextuple == NULL);
+			Assert(rel->rd_indclass == NULL);
 			Assert(rel->rd_am == NULL);
 			Assert(rel->rd_indexcxt == NULL);
 			Assert(rel->rd_operator == NULL);
--- a/src/backend/utils/cache/syscache.c
+++ b/src/backend/utils/cache/syscache.c
@@ -8,7 +8,7 @@
 *
 *
 * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/cache/syscache.c,v 1.96 2004/12/31 22:01:25 pgsql Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/cache/syscache.c,v 1.97 2005/03/29 00:17:12 tgl Exp $
 *
 * NOTES
 *	  These routines allow the parser/planner/executor to perform
@@ -334,15 +334,15 @@ static const struct cachedesc cacheinfo[] = {
 			0,
 			0
 	}},
-	{ProcedureRelationName,		/* PROCNAMENSP */
-		ProcedureNameNspIndex,
+	{ProcedureRelationName,		/* PROCNAMEARGSNSP */
+		ProcedureNameArgsNspIndex,
 		0,
-		4,
+		3,
 		{
 			Anum_pg_proc_proname,
-			Anum_pg_proc_pronargs,
 			Anum_pg_proc_proargtypes,
-			Anum_pg_proc_pronamespace
+			Anum_pg_proc_pronamespace,
+			0
 	}},
 	{ProcedureRelationName,		/* PROCOID */
 		ProcedureOidIndex,
--- a/src/backend/utils/fmgr/fmgr.c
+++ b/src/backend/utils/fmgr/fmgr.c
@@ -8,7 +8,7 @@
 *
 *
 * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/fmgr/fmgr.c,v 1.90 2005/03/22 20:13:07 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/fmgr/fmgr.c,v 1.91 2005/03/29 00:17:15 tgl Exp $
 *
 *-------------------------------------------------------------------------
 */
@@ -344,7 +344,7 @@ fmgr_info_C_lang(Oid functionId, FmgrInfo *finfo, HeapTuple procedureTuple)
 			for (i = 0; i < procedureStruct->pronargs; i++)
 			{
 				fnextra->arg_toastable[i] =
-					TypeIsToastable(procedureStruct->proargtypes[i]);
+					TypeIsToastable(procedureStruct->proargtypes.values[i]);
 			}
 			break;
 		case 1: