Adding upstream version 15.4.upstream/15.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1213 insertions, 0 deletions

diff --git a/src/backend/catalog/pg_proc.c b/src/backend/catalog/pg_proc.c
new file mode 100644
index 0000000..7514015
--- /dev/null
+++ b/src/backend/catalog/pg_proc.c
@@ -0,0 +1,1213 @@
+/*-------------------------------------------------------------------------
+ *
+ * pg_proc.c
+ *	  routines to support manipulation of the pg_proc relation
+ *
+ * Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ *
+ * IDENTIFICATION
+ *	  src/backend/catalog/pg_proc.c
+ *
+ *-------------------------------------------------------------------------
+ */
+#include "postgres.h"
+
+#include "access/htup_details.h"
+#include "access/table.h"
+#include "access/xact.h"
+#include "catalog/catalog.h"
+#include "catalog/dependency.h"
+#include "catalog/indexing.h"
+#include "catalog/objectaccess.h"
+#include "catalog/pg_language.h"
+#include "catalog/pg_namespace.h"
+#include "catalog/pg_proc.h"
+#include "catalog/pg_transform.h"
+#include "catalog/pg_type.h"
+#include "commands/defrem.h"
+#include "executor/functions.h"
+#include "funcapi.h"
+#include "mb/pg_wchar.h"
+#include "miscadmin.h"
+#include "nodes/nodeFuncs.h"
+#include "parser/analyze.h"
+#include "parser/parse_coerce.h"
+#include "parser/parse_type.h"
+#include "pgstat.h"
+#include "rewrite/rewriteHandler.h"
+#include "tcop/pquery.h"
+#include "tcop/tcopprot.h"
+#include "utils/acl.h"
+#include "utils/builtins.h"
+#include "utils/lsyscache.h"
+#include "utils/regproc.h"
+#include "utils/rel.h"
+#include "utils/syscache.h"
+
+
+typedef struct
+{
+	char	   *proname;
+	char	   *prosrc;
+} parse_error_callback_arg;
+
+static void sql_function_parse_error_callback(void *arg);
+static int	match_prosrc_to_query(const char *prosrc, const char *queryText,
+								  int cursorpos);
+static bool match_prosrc_to_literal(const char *prosrc, const char *literal,
+									int cursorpos, int *newcursorpos);
+
+
+/* ----------------------------------------------------------------
+ *		ProcedureCreate
+ *
+ * Note: allParameterTypes, parameterModes, parameterNames, trftypes, and proconfig
+ * are either arrays of the proper types or NULL.  We declare them Datum,
+ * not "ArrayType *", to avoid importing array.h into pg_proc.h.
+ * ----------------------------------------------------------------
+ */
+ObjectAddress
+ProcedureCreate(const char *procedureName,
+				Oid procNamespace,
+				bool replace,
+				bool returnsSet,
+				Oid returnType,
+				Oid proowner,
+				Oid languageObjectId,
+				Oid languageValidator,
+				const char *prosrc,
+				const char *probin,
+				Node *prosqlbody,
+				char prokind,
+				bool security_definer,
+				bool isLeakProof,
+				bool isStrict,
+				char volatility,
+				char parallel,
+				oidvector *parameterTypes,
+				Datum allParameterTypes,
+				Datum parameterModes,
+				Datum parameterNames,
+				List *parameterDefaults,
+				Datum trftypes,
+				Datum proconfig,
+				Oid prosupport,
+				float4 procost,
+				float4 prorows)
+{
+	Oid			retval;
+	int			parameterCount;
+	int			allParamCount;
+	Oid		   *allParams;
+	char	   *paramModes = NULL;
+	Oid			variadicType = InvalidOid;
+	Acl		   *proacl = NULL;
+	Relation	rel;
+	HeapTuple	tup;
+	HeapTuple	oldtup;
+	bool		nulls[Natts_pg_proc];
+	Datum		values[Natts_pg_proc];
+	bool		replaces[Natts_pg_proc];
+	NameData	procname;
+	TupleDesc	tupDesc;
+	bool		is_update;
+	ObjectAddress myself,
+				referenced;
+	char	   *detailmsg;
+	int			i;
+	Oid			trfid;
+	ObjectAddresses *addrs;
+
+	/*
+	 * sanity checks
+	 */
+	Assert(PointerIsValid(prosrc));
+
+	parameterCount = parameterTypes->dim1;
+	if (parameterCount < 0 || parameterCount > FUNC_MAX_ARGS)
+		ereport(ERROR,
+				(errcode(ERRCODE_TOO_MANY_ARGUMENTS),
+				 errmsg_plural("functions cannot have more than %d argument",
+							   "functions cannot have more than %d arguments",
+							   FUNC_MAX_ARGS,
+							   FUNC_MAX_ARGS)));
+	/* note: the above is correct, we do NOT count output arguments */
+
+	/* Deconstruct array inputs */
+	if (allParameterTypes != PointerGetDatum(NULL))
+	{
+		/*
+		 * We expect the array to be a 1-D OID array; verify that. We don't
+		 * need to use deconstruct_array() since the array data is just going
+		 * to look like a C array of OID values.
+		 */
+		ArrayType  *allParamArray = (ArrayType *) DatumGetPointer(allParameterTypes);
+
+		allParamCount = ARR_DIMS(allParamArray)[0];
+		if (ARR_NDIM(allParamArray) != 1 ||
+			allParamCount <= 0 ||
+			ARR_HASNULL(allParamArray) ||
+			ARR_ELEMTYPE(allParamArray) != OIDOID)
+			elog(ERROR, "allParameterTypes is not a 1-D Oid array");
+		allParams = (Oid *) ARR_DATA_PTR(allParamArray);
+		Assert(allParamCount >= parameterCount);
+		/* we assume caller got the contents right */
+	}
+	else
+	{
+		allParamCount = parameterCount;
+		allParams = parameterTypes->values;
+	}
+
+	if (parameterModes != PointerGetDatum(NULL))
+	{
+		/*
+		 * We expect the array to be a 1-D CHAR array; verify that. We don't
+		 * need to use deconstruct_array() since the array data is just going
+		 * to look like a C array of char values.
+		 */
+		ArrayType  *modesArray = (ArrayType *) DatumGetPointer(parameterModes);
+
+		if (ARR_NDIM(modesArray) != 1 ||
+			ARR_DIMS(modesArray)[0] != allParamCount ||
+			ARR_HASNULL(modesArray) ||
+			ARR_ELEMTYPE(modesArray) != CHAROID)
+			elog(ERROR, "parameterModes is not a 1-D char array");
+		paramModes = (char *) ARR_DATA_PTR(modesArray);
+	}
+
+	/*
+	 * Do not allow polymorphic return type unless there is a polymorphic
+	 * input argument that we can use to deduce the actual return type.
+	 */
+	detailmsg = check_valid_polymorphic_signature(returnType,
+												  parameterTypes->values,
+												  parameterCount);
+	if (detailmsg)
+		ereport(ERROR,
+				(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
+				 errmsg("cannot determine result data type"),
+				 errdetail_internal("%s", detailmsg)));
+
+	/*
+	 * Also, do not allow return type INTERNAL unless at least one input
+	 * argument is INTERNAL.
+	 */
+	detailmsg = check_valid_internal_signature(returnType,
+											   parameterTypes->values,
+											   parameterCount);
+	if (detailmsg)
+		ereport(ERROR,
+				(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
+				 errmsg("unsafe use of pseudo-type \"internal\""),
+				 errdetail_internal("%s", detailmsg)));
+
+	/*
+	 * Apply the same tests to any OUT arguments.
+	 */
+	if (allParameterTypes != PointerGetDatum(NULL))
+	{
+		for (i = 0; i < allParamCount; i++)
+		{
+			if (paramModes == NULL ||
+				paramModes[i] == PROARGMODE_IN ||
+				paramModes[i] == PROARGMODE_VARIADIC)
+				continue;		/* ignore input-only params */
+
+			detailmsg = check_valid_polymorphic_signature(allParams[i],
+														  parameterTypes->values,
+														  parameterCount);
+			if (detailmsg)
+				ereport(ERROR,
+						(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
+						 errmsg("cannot determine result data type"),
+						 errdetail_internal("%s", detailmsg)));
+			detailmsg = check_valid_internal_signature(allParams[i],
+													   parameterTypes->values,
+													   parameterCount);
+			if (detailmsg)
+				ereport(ERROR,
+						(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
+						 errmsg("unsafe use of pseudo-type \"internal\""),
+						 errdetail_internal("%s", detailmsg)));
+		}
+	}
+
+	/* Identify variadic argument type, if any */
+	if (paramModes != NULL)
+	{
+		/*
+		 * Only the last input parameter can be variadic; if it is, save its
+		 * element type.  Errors here are just elog since caller should have
+		 * checked this already.
+		 */
+		for (i = 0; i < allParamCount; i++)
+		{
+			switch (paramModes[i])
+			{
+				case PROARGMODE_IN:
+				case PROARGMODE_INOUT:
+					if (OidIsValid(variadicType))
+						elog(ERROR, "variadic parameter must be last");
+					break;
+				case PROARGMODE_OUT:
+					if (OidIsValid(variadicType) && prokind == PROKIND_PROCEDURE)
+						elog(ERROR, "variadic parameter must be last");
+					break;
+				case PROARGMODE_TABLE:
+					/* okay */
+					break;
+				case PROARGMODE_VARIADIC:
+					if (OidIsValid(variadicType))
+						elog(ERROR, "variadic parameter must be last");
+					switch (allParams[i])
+					{
+						case ANYOID:
+							variadicType = ANYOID;
+							break;
+						case ANYARRAYOID:
+							variadicType = ANYELEMENTOID;
+							break;
+						case ANYCOMPATIBLEARRAYOID:
+							variadicType = ANYCOMPATIBLEOID;
+							break;
+						default:
+							variadicType = get_element_type(allParams[i]);
+							if (!OidIsValid(variadicType))
+								elog(ERROR, "variadic parameter is not an array");
+							break;
+					}
+					break;
+				default:
+					elog(ERROR, "invalid parameter mode '%c'", paramModes[i]);
+					break;
+			}
+		}
+	}
+
+	/*
+	 * All seems OK; prepare the data to be inserted into pg_proc.
+	 */
+
+	for (i = 0; i < Natts_pg_proc; ++i)
+	{
+		nulls[i] = false;
+		values[i] = (Datum) 0;
+		replaces[i] = true;
+	}
+
+	namestrcpy(&procname, procedureName);
+	values[Anum_pg_proc_proname - 1] = NameGetDatum(&procname);
+	values[Anum_pg_proc_pronamespace - 1] = ObjectIdGetDatum(procNamespace);
+	values[Anum_pg_proc_proowner - 1] = ObjectIdGetDatum(proowner);
+	values[Anum_pg_proc_prolang - 1] = ObjectIdGetDatum(languageObjectId);
+	values[Anum_pg_proc_procost - 1] = Float4GetDatum(procost);
+	values[Anum_pg_proc_prorows - 1] = Float4GetDatum(prorows);
+	values[Anum_pg_proc_provariadic - 1] = ObjectIdGetDatum(variadicType);
+	values[Anum_pg_proc_prosupport - 1] = ObjectIdGetDatum(prosupport);
+	values[Anum_pg_proc_prokind - 1] = CharGetDatum(prokind);
+	values[Anum_pg_proc_prosecdef - 1] = BoolGetDatum(security_definer);
+	values[Anum_pg_proc_proleakproof - 1] = BoolGetDatum(isLeakProof);
+	values[Anum_pg_proc_proisstrict - 1] = BoolGetDatum(isStrict);
+	values[Anum_pg_proc_proretset - 1] = BoolGetDatum(returnsSet);
+	values[Anum_pg_proc_provolatile - 1] = CharGetDatum(volatility);
+	values[Anum_pg_proc_proparallel - 1] = CharGetDatum(parallel);
+	values[Anum_pg_proc_pronargs - 1] = UInt16GetDatum(parameterCount);
+	values[Anum_pg_proc_pronargdefaults - 1] = UInt16GetDatum(list_length(parameterDefaults));
+	values[Anum_pg_proc_prorettype - 1] = ObjectIdGetDatum(returnType);
+	values[Anum_pg_proc_proargtypes - 1] = PointerGetDatum(parameterTypes);
+	if (allParameterTypes != PointerGetDatum(NULL))
+		values[Anum_pg_proc_proallargtypes - 1] = allParameterTypes;
+	else
+		nulls[Anum_pg_proc_proallargtypes - 1] = true;
+	if (parameterModes != PointerGetDatum(NULL))
+		values[Anum_pg_proc_proargmodes - 1] = parameterModes;
+	else
+		nulls[Anum_pg_proc_proargmodes - 1] = true;
+	if (parameterNames != PointerGetDatum(NULL))
+		values[Anum_pg_proc_proargnames - 1] = parameterNames;
+	else
+		nulls[Anum_pg_proc_proargnames - 1] = true;
+	if (parameterDefaults != NIL)
+		values[Anum_pg_proc_proargdefaults - 1] = CStringGetTextDatum(nodeToString(parameterDefaults));
+	else
+		nulls[Anum_pg_proc_proargdefaults - 1] = true;
+	if (trftypes != PointerGetDatum(NULL))
+		values[Anum_pg_proc_protrftypes - 1] = trftypes;
+	else
+		nulls[Anum_pg_proc_protrftypes - 1] = true;
+	values[Anum_pg_proc_prosrc - 1] = CStringGetTextDatum(prosrc);
+	if (probin)
+		values[Anum_pg_proc_probin - 1] = CStringGetTextDatum(probin);
+	else
+		nulls[Anum_pg_proc_probin - 1] = true;
+	if (prosqlbody)
+		values[Anum_pg_proc_prosqlbody - 1] = CStringGetTextDatum(nodeToString(prosqlbody));
+	else
+		nulls[Anum_pg_proc_prosqlbody - 1] = true;
+	if (proconfig != PointerGetDatum(NULL))
+		values[Anum_pg_proc_proconfig - 1] = proconfig;
+	else
+		nulls[Anum_pg_proc_proconfig - 1] = true;
+	/* proacl will be determined later */
+
+	rel = table_open(ProcedureRelationId, RowExclusiveLock);
+	tupDesc = RelationGetDescr(rel);
+
+	/* Check for pre-existing definition */
+	oldtup = SearchSysCache3(PROCNAMEARGSNSP,
+							 PointerGetDatum(procedureName),
+							 PointerGetDatum(parameterTypes),
+							 ObjectIdGetDatum(procNamespace));
+
+	if (HeapTupleIsValid(oldtup))
+	{
+		/* There is one; okay to replace it? */
+		Form_pg_proc oldproc = (Form_pg_proc) GETSTRUCT(oldtup);
+		Datum		proargnames;
+		bool		isnull;
+		const char *dropcmd;
+
+		if (!replace)
+			ereport(ERROR,
+					(errcode(ERRCODE_DUPLICATE_FUNCTION),
+					 errmsg("function \"%s\" already exists with same argument types",
+							procedureName)));
+		if (!pg_proc_ownercheck(oldproc->oid, proowner))
+			aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_FUNCTION,
+						   procedureName);
+
+		/* Not okay to change routine kind */
+		if (oldproc->prokind != prokind)
+			ereport(ERROR,
+					(errcode(ERRCODE_WRONG_OBJECT_TYPE),
+					 errmsg("cannot change routine kind"),
+					 (oldproc->prokind == PROKIND_AGGREGATE ?
+					  errdetail("\"%s\" is an aggregate function.", procedureName) :
+					  oldproc->prokind == PROKIND_FUNCTION ?
+					  errdetail("\"%s\" is a function.", procedureName) :
+					  oldproc->prokind == PROKIND_PROCEDURE ?
+					  errdetail("\"%s\" is a procedure.", procedureName) :
+					  oldproc->prokind == PROKIND_WINDOW ?
+					  errdetail("\"%s\" is a window function.", procedureName) :
+					  0)));
+
+		dropcmd = (prokind == PROKIND_PROCEDURE ? "DROP PROCEDURE" :
+				   prokind == PROKIND_AGGREGATE ? "DROP AGGREGATE" :
+				   "DROP FUNCTION");
+
+		/*
+		 * Not okay to change the return type of the existing proc, since
+		 * existing rules, views, etc may depend on the return type.
+		 *
+		 * In case of a procedure, a changing return type means that whether
+		 * the procedure has output parameters was changed.  Since there is no
+		 * user visible return type, we produce a more specific error message.
+		 */
+		if (returnType != oldproc->prorettype ||
+			returnsSet != oldproc->proretset)
+			ereport(ERROR,
+					(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
+					 prokind == PROKIND_PROCEDURE
+					 ? errmsg("cannot change whether a procedure has output parameters")
+					 : errmsg("cannot change return type of existing function"),
+
+			/*
+			 * translator: first %s is DROP FUNCTION, DROP PROCEDURE, or DROP
+			 * AGGREGATE
+			 */
+					 errhint("Use %s %s first.",
+							 dropcmd,
+							 format_procedure(oldproc->oid))));
+
+		/*
+		 * If it returns RECORD, check for possible change of record type
+		 * implied by OUT parameters
+		 */
+		if (returnType == RECORDOID)
+		{
+			TupleDesc	olddesc;
+			TupleDesc	newdesc;
+
+			olddesc = build_function_result_tupdesc_t(oldtup);
+			newdesc = build_function_result_tupdesc_d(prokind,
+													  allParameterTypes,
+													  parameterModes,
+													  parameterNames);
+			if (olddesc == NULL && newdesc == NULL)
+				 /* ok, both are runtime-defined RECORDs */ ;
+			else if (olddesc == NULL || newdesc == NULL ||
+					 !equalTupleDescs(olddesc, newdesc))
+				ereport(ERROR,
+						(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
+						 errmsg("cannot change return type of existing function"),
+						 errdetail("Row type defined by OUT parameters is different."),
+				/* translator: first %s is DROP FUNCTION or DROP PROCEDURE */
+						 errhint("Use %s %s first.",
+								 dropcmd,
+								 format_procedure(oldproc->oid))));
+		}
+
+		/*
+		 * If there were any named input parameters, check to make sure the
+		 * names have not been changed, as this could break existing calls. We
+		 * allow adding names to formerly unnamed parameters, though.
+		 */
+		proargnames = SysCacheGetAttr(PROCNAMEARGSNSP, oldtup,
+									  Anum_pg_proc_proargnames,
+									  &isnull);
+		if (!isnull)
+		{
+			Datum		proargmodes;
+			char	  **old_arg_names;
+			char	  **new_arg_names;
+			int			n_old_arg_names;
+			int			n_new_arg_names;
+			int			j;
+
+			proargmodes = SysCacheGetAttr(PROCNAMEARGSNSP, oldtup,
+										  Anum_pg_proc_proargmodes,
+										  &isnull);
+			if (isnull)
+				proargmodes = PointerGetDatum(NULL);	/* just to be sure */
+
+			n_old_arg_names = get_func_input_arg_names(proargnames,
+													   proargmodes,
+													   &old_arg_names);
+			n_new_arg_names = get_func_input_arg_names(parameterNames,
+													   parameterModes,
+													   &new_arg_names);
+			for (j = 0; j < n_old_arg_names; j++)
+			{
+				if (old_arg_names[j] == NULL)
+					continue;
+				if (j >= n_new_arg_names || new_arg_names[j] == NULL ||
+					strcmp(old_arg_names[j], new_arg_names[j]) != 0)
+					ereport(ERROR,
+							(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
+							 errmsg("cannot change name of input parameter \"%s\"",
+									old_arg_names[j]),
+					/* translator: first %s is DROP FUNCTION or DROP PROCEDURE */
+							 errhint("Use %s %s first.",
+									 dropcmd,
+									 format_procedure(oldproc->oid))));
+			}
+		}
+
+		/*
+		 * If there are existing defaults, check compatibility: redefinition
+		 * must not remove any defaults nor change their types.  (Removing a
+		 * default might cause a function to fail to satisfy an existing call.
+		 * Changing type would only be possible if the associated parameter is
+		 * polymorphic, and in such cases a change of default type might alter
+		 * the resolved output type of existing calls.)
+		 */
+		if (oldproc->pronargdefaults != 0)
+		{
+			Datum		proargdefaults;
+			List	   *oldDefaults;
+			ListCell   *oldlc;
+			ListCell   *newlc;
+
+			if (list_length(parameterDefaults) < oldproc->pronargdefaults)
+				ereport(ERROR,
+						(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
+						 errmsg("cannot remove parameter defaults from existing function"),
+				/* translator: first %s is DROP FUNCTION or DROP PROCEDURE */
+						 errhint("Use %s %s first.",
+								 dropcmd,
+								 format_procedure(oldproc->oid))));
+
+			proargdefaults = SysCacheGetAttr(PROCNAMEARGSNSP, oldtup,
+											 Anum_pg_proc_proargdefaults,
+											 &isnull);
+			Assert(!isnull);
+			oldDefaults = castNode(List, stringToNode(TextDatumGetCString(proargdefaults)));
+			Assert(list_length(oldDefaults) == oldproc->pronargdefaults);
+
+			/* new list can have more defaults than old, advance over 'em */
+			newlc = list_nth_cell(parameterDefaults,
+								  list_length(parameterDefaults) -
+								  oldproc->pronargdefaults);
+
+			foreach(oldlc, oldDefaults)
+			{
+				Node	   *oldDef = (Node *) lfirst(oldlc);
+				Node	   *newDef = (Node *) lfirst(newlc);
+
+				if (exprType(oldDef) != exprType(newDef))
+					ereport(ERROR,
+							(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
+							 errmsg("cannot change data type of existing parameter default value"),
+					/* translator: first %s is DROP FUNCTION or DROP PROCEDURE */
+							 errhint("Use %s %s first.",
+									 dropcmd,
+									 format_procedure(oldproc->oid))));
+				newlc = lnext(parameterDefaults, newlc);
+			}
+		}
+
+		/*
+		 * Do not change existing oid, ownership or permissions, either.  Note
+		 * dependency-update code below has to agree with this decision.
+		 */
+		replaces[Anum_pg_proc_oid - 1] = false;
+		replaces[Anum_pg_proc_proowner - 1] = false;
+		replaces[Anum_pg_proc_proacl - 1] = false;
+
+		/* Okay, do it... */
+		tup = heap_modify_tuple(oldtup, tupDesc, values, nulls, replaces);
+		CatalogTupleUpdate(rel, &tup->t_self, tup);
+
+		ReleaseSysCache(oldtup);
+		is_update = true;
+	}
+	else
+	{
+		/* Creating a new procedure */
+		Oid			newOid;
+
+		/* First, get default permissions and set up proacl */
+		proacl = get_user_default_acl(OBJECT_FUNCTION, proowner,
+									  procNamespace);
+		if (proacl != NULL)
+			values[Anum_pg_proc_proacl - 1] = PointerGetDatum(proacl);
+		else
+			nulls[Anum_pg_proc_proacl - 1] = true;
+
+		newOid = GetNewOidWithIndex(rel, ProcedureOidIndexId,
+									Anum_pg_proc_oid);
+		values[Anum_pg_proc_oid - 1] = ObjectIdGetDatum(newOid);
+		tup = heap_form_tuple(tupDesc, values, nulls);
+		CatalogTupleInsert(rel, tup);
+		is_update = false;
+	}
+
+
+	retval = ((Form_pg_proc) GETSTRUCT(tup))->oid;
+
+	/*
+	 * Create dependencies for the new function.  If we are updating an
+	 * existing function, first delete any existing pg_depend entries.
+	 * (However, since we are not changing ownership or permissions, the
+	 * shared dependencies do *not* need to change, and we leave them alone.)
+	 */
+	if (is_update)
+		deleteDependencyRecordsFor(ProcedureRelationId, retval, true);
+
+	addrs = new_object_addresses();
+
+	ObjectAddressSet(myself, ProcedureRelationId, retval);
+
+	/* dependency on namespace */
+	ObjectAddressSet(referenced, NamespaceRelationId, procNamespace);
+	add_exact_object_address(&referenced, addrs);
+
+	/* dependency on implementation language */
+	ObjectAddressSet(referenced, LanguageRelationId, languageObjectId);
+	add_exact_object_address(&referenced, addrs);
+
+	/* dependency on return type */
+	ObjectAddressSet(referenced, TypeRelationId, returnType);
+	add_exact_object_address(&referenced, addrs);
+
+	/* dependency on transform used by return type, if any */
+	if ((trfid = get_transform_oid(returnType, languageObjectId, true)))
+	{
+		ObjectAddressSet(referenced, TransformRelationId, trfid);
+		add_exact_object_address(&referenced, addrs);
+	}
+
+	/* dependency on parameter types */
+	for (i = 0; i < allParamCount; i++)
+	{
+		ObjectAddressSet(referenced, TypeRelationId, allParams[i]);
+		add_exact_object_address(&referenced, addrs);
+
+		/* dependency on transform used by parameter type, if any */
+		if ((trfid = get_transform_oid(allParams[i], languageObjectId, true)))
+		{
+			ObjectAddressSet(referenced, TransformRelationId, trfid);
+			add_exact_object_address(&referenced, addrs);
+		}
+	}
+
+	/* dependency on support function, if any */
+	if (OidIsValid(prosupport))
+	{
+		ObjectAddressSet(referenced, ProcedureRelationId, prosupport);
+		add_exact_object_address(&referenced, addrs);
+	}
+
+	record_object_address_dependencies(&myself, addrs, DEPENDENCY_NORMAL);
+	free_object_addresses(addrs);
+
+	/* dependency on SQL routine body */
+	if (languageObjectId == SQLlanguageId && prosqlbody)
+		recordDependencyOnExpr(&myself, prosqlbody, NIL, DEPENDENCY_NORMAL);
+
+	/* dependency on parameter default expressions */
+	if (parameterDefaults)
+		recordDependencyOnExpr(&myself, (Node *) parameterDefaults,
+							   NIL, DEPENDENCY_NORMAL);
+
+	/* dependency on owner */
+	if (!is_update)
+		recordDependencyOnOwner(ProcedureRelationId, retval, proowner);
+
+	/* dependency on any roles mentioned in ACL */
+	if (!is_update)
+		recordDependencyOnNewAcl(ProcedureRelationId, retval, 0,
+								 proowner, proacl);
+
+	/* dependency on extension */
+	recordDependencyOnCurrentExtension(&myself, is_update);
+
+	heap_freetuple(tup);
+
+	/* Post creation hook for new function */
+	InvokeObjectPostCreateHook(ProcedureRelationId, retval, 0);
+
+	table_close(rel, RowExclusiveLock);
+
+	/* Verify function body */
+	if (OidIsValid(languageValidator))
+	{
+		ArrayType  *set_items = NULL;
+		int			save_nestlevel = 0;
+
+		/* Advance command counter so new tuple can be seen by validator */
+		CommandCounterIncrement();
+
+		/*
+		 * Set per-function configuration parameters so that the validation is
+		 * done with the environment the function expects.  However, if
+		 * check_function_bodies is off, we don't do this, because that would
+		 * create dump ordering hazards that pg_dump doesn't know how to deal
+		 * with.  (For example, a SET clause might refer to a not-yet-created
+		 * text search configuration.)	This means that the validator
+		 * shouldn't complain about anything that might depend on a GUC
+		 * parameter when check_function_bodies is off.
+		 */
+		if (check_function_bodies)
+		{
+			set_items = (ArrayType *) DatumGetPointer(proconfig);
+			if (set_items)		/* Need a new GUC nesting level */
+			{
+				save_nestlevel = NewGUCNestLevel();
+				ProcessGUCArray(set_items,
+								(superuser() ? PGC_SUSET : PGC_USERSET),
+								PGC_S_SESSION,
+								GUC_ACTION_SAVE);
+			}
+		}
+
+		OidFunctionCall1(languageValidator, ObjectIdGetDatum(retval));
+
+		if (set_items)
+			AtEOXact_GUC(true, save_nestlevel);
+	}
+
+	/* ensure that stats are dropped if transaction aborts */
+	if (!is_update)
+		pgstat_create_function(retval);
+
+	return myself;
+}
+
+
+
+/*
+ * Validator for internal functions
+ *
+ * Check that the given internal function name (the "prosrc" value) is
+ * a known builtin function.
+ */
+Datum
+fmgr_internal_validator(PG_FUNCTION_ARGS)
+{
+	Oid			funcoid = PG_GETARG_OID(0);
+	HeapTuple	tuple;
+	bool		isnull;
+	Datum		tmp;
+	char	   *prosrc;
+
+	if (!CheckFunctionValidatorAccess(fcinfo->flinfo->fn_oid, funcoid))
+		PG_RETURN_VOID();
+
+	/*
+	 * We do not honor check_function_bodies since it's unlikely the function
+	 * name will be found later if it isn't there now.
+	 */
+
+	tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcoid));
+	if (!HeapTupleIsValid(tuple))
+		elog(ERROR, "cache lookup failed for function %u", funcoid);
+
+	tmp = SysCacheGetAttr(PROCOID, tuple, Anum_pg_proc_prosrc, &isnull);
+	if (isnull)
+		elog(ERROR, "null prosrc");
+	prosrc = TextDatumGetCString(tmp);
+
+	if (fmgr_internal_function(prosrc) == InvalidOid)
+		ereport(ERROR,
+				(errcode(ERRCODE_UNDEFINED_FUNCTION),
+				 errmsg("there is no built-in function named \"%s\"",
+						prosrc)));
+
+	ReleaseSysCache(tuple);
+
+	PG_RETURN_VOID();
+}
+
+
+
+/*
+ * Validator for C language functions
+ *
+ * Make sure that the library file exists, is loadable, and contains
+ * the specified link symbol. Also check for a valid function
+ * information record.
+ */
+Datum
+fmgr_c_validator(PG_FUNCTION_ARGS)
+{
+	Oid			funcoid = PG_GETARG_OID(0);
+	void	   *libraryhandle;
+	HeapTuple	tuple;
+	bool		isnull;
+	Datum		tmp;
+	char	   *prosrc;
+	char	   *probin;
+
+	if (!CheckFunctionValidatorAccess(fcinfo->flinfo->fn_oid, funcoid))
+		PG_RETURN_VOID();
+
+	/*
+	 * It'd be most consistent to skip the check if !check_function_bodies,
+	 * but the purpose of that switch is to be helpful for pg_dump loading,
+	 * and for pg_dump loading it's much better if we *do* check.
+	 */
+
+	tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcoid));
+	if (!HeapTupleIsValid(tuple))
+		elog(ERROR, "cache lookup failed for function %u", funcoid);
+
+	tmp = SysCacheGetAttr(PROCOID, tuple, Anum_pg_proc_prosrc, &isnull);
+	if (isnull)
+		elog(ERROR, "null prosrc for C function %u", funcoid);
+	prosrc = TextDatumGetCString(tmp);
+
+	tmp = SysCacheGetAttr(PROCOID, tuple, Anum_pg_proc_probin, &isnull);
+	if (isnull)
+		elog(ERROR, "null probin for C function %u", funcoid);
+	probin = TextDatumGetCString(tmp);
+
+	(void) load_external_function(probin, prosrc, true, &libraryhandle);
+	(void) fetch_finfo_record(libraryhandle, prosrc);
+
+	ReleaseSysCache(tuple);
+
+	PG_RETURN_VOID();
+}
+
+
+/*
+ * Validator for SQL language functions
+ *
+ * Parse it here in order to be sure that it contains no syntax errors.
+ */
+Datum
+fmgr_sql_validator(PG_FUNCTION_ARGS)
+{
+	Oid			funcoid = PG_GETARG_OID(0);
+	HeapTuple	tuple;
+	Form_pg_proc proc;
+	List	   *raw_parsetree_list;
+	List	   *querytree_list;
+	ListCell   *lc;
+	bool		isnull;
+	Datum		tmp;
+	char	   *prosrc;
+	parse_error_callback_arg callback_arg;
+	ErrorContextCallback sqlerrcontext;
+	bool		haspolyarg;
+	int			i;
+
+	if (!CheckFunctionValidatorAccess(fcinfo->flinfo->fn_oid, funcoid))
+		PG_RETURN_VOID();
+
+	tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcoid));
+	if (!HeapTupleIsValid(tuple))
+		elog(ERROR, "cache lookup failed for function %u", funcoid);
+	proc = (Form_pg_proc) GETSTRUCT(tuple);
+
+	/* Disallow pseudotype result */
+	/* except for RECORD, VOID, or polymorphic */
+	if (get_typtype(proc->prorettype) == TYPTYPE_PSEUDO &&
+		proc->prorettype != RECORDOID &&
+		proc->prorettype != VOIDOID &&
+		!IsPolymorphicType(proc->prorettype))
+		ereport(ERROR,
+				(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
+				 errmsg("SQL functions cannot return type %s",
+						format_type_be(proc->prorettype))));
+
+	/* Disallow pseudotypes in arguments */
+	/* except for polymorphic */
+	haspolyarg = false;
+	for (i = 0; i < proc->pronargs; i++)
+	{
+		if (get_typtype(proc->proargtypes.values[i]) == TYPTYPE_PSEUDO)
+		{
+			if (IsPolymorphicType(proc->proargtypes.values[i]))
+				haspolyarg = true;
+			else
+				ereport(ERROR,
+						(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
+						 errmsg("SQL functions cannot have arguments of type %s",
+								format_type_be(proc->proargtypes.values[i]))));
+		}
+	}
+
+	/* Postpone body checks if !check_function_bodies */
+	if (check_function_bodies)
+	{
+		tmp = SysCacheGetAttr(PROCOID, tuple, Anum_pg_proc_prosrc, &isnull);
+		if (isnull)
+			elog(ERROR, "null prosrc");
+
+		prosrc = TextDatumGetCString(tmp);
+
+		/*
+		 * Setup error traceback support for ereport().
+		 */
+		callback_arg.proname = NameStr(proc->proname);
+		callback_arg.prosrc = prosrc;
+
+		sqlerrcontext.callback = sql_function_parse_error_callback;
+		sqlerrcontext.arg = (void *) &callback_arg;
+		sqlerrcontext.previous = error_context_stack;
+		error_context_stack = &sqlerrcontext;
+
+		/* If we have prosqlbody, pay attention to that not prosrc */
+		tmp = SysCacheGetAttr(PROCOID, tuple, Anum_pg_proc_prosqlbody, &isnull);
+		if (!isnull)
+		{
+			Node	   *n;
+			List	   *stored_query_list;
+
+			n = stringToNode(TextDatumGetCString(tmp));
+			if (IsA(n, List))
+				stored_query_list = linitial(castNode(List, n));
+			else
+				stored_query_list = list_make1(n);
+
+			querytree_list = NIL;
+			foreach(lc, stored_query_list)
+			{
+				Query	   *parsetree = lfirst_node(Query, lc);
+				List	   *querytree_sublist;
+
+				/*
+				 * Typically, we'd have acquired locks already while parsing
+				 * the body of the CREATE FUNCTION command.  However, a
+				 * validator function cannot assume that it's only called in
+				 * that context.
+				 */
+				AcquireRewriteLocks(parsetree, true, false);
+				querytree_sublist = pg_rewrite_query(parsetree);
+				querytree_list = lappend(querytree_list, querytree_sublist);
+			}
+		}
+		else
+		{
+			/*
+			 * We can't do full prechecking of the function definition if
+			 * there are any polymorphic input types, because actual datatypes
+			 * of expression results will be unresolvable.  The check will be
+			 * done at runtime instead.
+			 *
+			 * We can run the text through the raw parser though; this will at
+			 * least catch silly syntactic errors.
+			 */
+			raw_parsetree_list = pg_parse_query(prosrc);
+			querytree_list = NIL;
+
+			if (!haspolyarg)
+			{
+				/*
+				 * OK to do full precheck: analyze and rewrite the queries,
+				 * then verify the result type.
+				 */
+				SQLFunctionParseInfoPtr pinfo;
+
+				/* But first, set up parameter information */
+				pinfo = prepare_sql_fn_parse_info(tuple, NULL, InvalidOid);
+
+				foreach(lc, raw_parsetree_list)
+				{
+					RawStmt    *parsetree = lfirst_node(RawStmt, lc);
+					List	   *querytree_sublist;
+
+					querytree_sublist = pg_analyze_and_rewrite_withcb(parsetree,
+																	  prosrc,
+																	  (ParserSetupHook) sql_fn_parser_setup,
+																	  pinfo,
+																	  NULL);
+					querytree_list = lappend(querytree_list,
+											 querytree_sublist);
+				}
+			}
+		}
+
+		if (!haspolyarg)
+		{
+			Oid			rettype;
+			TupleDesc	rettupdesc;
+
+			check_sql_fn_statements(querytree_list);
+
+			(void) get_func_result_type(funcoid, &rettype, &rettupdesc);
+
+			(void) check_sql_fn_retval(querytree_list,
+									   rettype, rettupdesc,
+									   false, NULL);
+		}
+
+		error_context_stack = sqlerrcontext.previous;
+	}
+
+	ReleaseSysCache(tuple);
+
+	PG_RETURN_VOID();
+}
+
+/*
+ * Error context callback for handling errors in SQL function definitions
+ */
+static void
+sql_function_parse_error_callback(void *arg)
+{
+	parse_error_callback_arg *callback_arg = (parse_error_callback_arg *) arg;
+
+	/* See if it's a syntax error; if so, transpose to CREATE FUNCTION */
+	if (!function_parse_error_transpose(callback_arg->prosrc))
+	{
+		/* If it's not a syntax error, push info onto context stack */
+		errcontext("SQL function \"%s\"", callback_arg->proname);
+	}
+}
+
+/*
+ * Adjust a syntax error occurring inside the function body of a CREATE
+ * FUNCTION or DO command.  This can be used by any function validator or
+ * anonymous-block handler, not only for SQL-language functions.
+ * It is assumed that the syntax error position is initially relative to the
+ * function body string (as passed in).  If possible, we adjust the position
+ * to reference the original command text; if we can't manage that, we set
+ * up an "internal query" syntax error instead.
+ *
+ * Returns true if a syntax error was processed, false if not.
+ */
+bool
+function_parse_error_transpose(const char *prosrc)
+{
+	int			origerrposition;
+	int			newerrposition;
+
+	/*
+	 * Nothing to do unless we are dealing with a syntax error that has a
+	 * cursor position.
+	 *
+	 * Some PLs may prefer to report the error position as an internal error
+	 * to begin with, so check that too.
+	 */
+	origerrposition = geterrposition();
+	if (origerrposition <= 0)
+	{
+		origerrposition = getinternalerrposition();
+		if (origerrposition <= 0)
+			return false;
+	}
+
+	/* We can get the original query text from the active portal (hack...) */
+	if (ActivePortal && ActivePortal->status == PORTAL_ACTIVE)
+	{
+		const char *queryText = ActivePortal->sourceText;
+
+		/* Try to locate the prosrc in the original text */
+		newerrposition = match_prosrc_to_query(prosrc, queryText,
+											   origerrposition);
+	}
+	else
+	{
+		/*
+		 * Quietly give up if no ActivePortal.  This is an unusual situation
+		 * but it can happen in, e.g., logical replication workers.
+		 */
+		newerrposition = -1;
+	}
+
+	if (newerrposition > 0)
+	{
+		/* Successful, so fix error position to reference original query */
+		errposition(newerrposition);
+		/* Get rid of any report of the error as an "internal query" */
+		internalerrposition(0);
+		internalerrquery(NULL);
+	}
+	else
+	{
+		/*
+		 * If unsuccessful, convert the position to an internal position
+		 * marker and give the function text as the internal query.
+		 */
+		errposition(0);
+		internalerrposition(origerrposition);
+		internalerrquery(prosrc);
+	}
+
+	return true;
+}
+
+/*
+ * Try to locate the string literal containing the function body in the
+ * given text of the CREATE FUNCTION or DO command.  If successful, return
+ * the character (not byte) index within the command corresponding to the
+ * given character index within the literal.  If not successful, return 0.
+ */
+static int
+match_prosrc_to_query(const char *prosrc, const char *queryText,
+					  int cursorpos)
+{
+	/*
+	 * Rather than fully parsing the original command, we just scan the
+	 * command looking for $prosrc$ or 'prosrc'.  This could be fooled (though
+	 * not in any very probable scenarios), so fail if we find more than one
+	 * match.
+	 */
+	int			prosrclen = strlen(prosrc);
+	int			querylen = strlen(queryText);
+	int			matchpos = 0;
+	int			curpos;
+	int			newcursorpos;
+
+	for (curpos = 0; curpos < querylen - prosrclen; curpos++)
+	{
+		if (queryText[curpos] == '$' &&
+			strncmp(prosrc, &queryText[curpos + 1], prosrclen) == 0 &&
+			queryText[curpos + 1 + prosrclen] == '$')
+		{
+			/*
+			 * Found a $foo$ match.  Since there are no embedded quoting
+			 * characters in a dollar-quoted literal, we don't have to do any
+			 * fancy arithmetic; just offset by the starting position.
+			 */
+			if (matchpos)
+				return 0;		/* multiple matches, fail */
+			matchpos = pg_mbstrlen_with_len(queryText, curpos + 1)
+				+ cursorpos;
+		}
+		else if (queryText[curpos] == '\'' &&
+				 match_prosrc_to_literal(prosrc, &queryText[curpos + 1],
+										 cursorpos, &newcursorpos))
+		{
+			/*
+			 * Found a 'foo' match.  match_prosrc_to_literal() has adjusted
+			 * for any quotes or backslashes embedded in the literal.
+			 */
+			if (matchpos)
+				return 0;		/* multiple matches, fail */
+			matchpos = pg_mbstrlen_with_len(queryText, curpos + 1)
+				+ newcursorpos;
+		}
+	}
+
+	return matchpos;
+}
+
+/*
+ * Try to match the given source text to a single-quoted literal.
+ * If successful, adjust newcursorpos to correspond to the character
+ * (not byte) index corresponding to cursorpos in the source text.
+ *
+ * At entry, literal points just past a ' character.  We must check for the
+ * trailing quote.
+ */
+static bool
+match_prosrc_to_literal(const char *prosrc, const char *literal,
+						int cursorpos, int *newcursorpos)
+{
+	int			newcp = cursorpos;
+	int			chlen;
+
+	/*
+	 * This implementation handles backslashes and doubled quotes in the
+	 * string literal.  It does not handle the SQL syntax for literals
+	 * continued across line boundaries.
+	 *
+	 * We do the comparison a character at a time, not a byte at a time, so
+	 * that we can do the correct cursorpos math.
+	 */
+	while (*prosrc)
+	{
+		cursorpos--;			/* characters left before cursor */
+
+		/*
+		 * Check for backslashes and doubled quotes in the literal; adjust
+		 * newcp when one is found before the cursor.
+		 */
+		if (*literal == '\\')
+		{
+			literal++;
+			if (cursorpos > 0)
+				newcp++;
+		}
+		else if (*literal == '\'')
+		{
+			if (literal[1] != '\'')
+				goto fail;
+			literal++;
+			if (cursorpos > 0)
+				newcp++;
+		}
+		chlen = pg_mblen(prosrc);
+		if (strncmp(prosrc, literal, chlen) != 0)
+			goto fail;
+		prosrc += chlen;
+		literal += chlen;
+	}
+
+	if (*literal == '\'' && literal[1] != '\'')
+	{
+		/* success */
+		*newcursorpos = newcp;
+		return true;
+	}
+
+fail:
+	/* Must set *newcursorpos to suppress compiler warning */
+	*newcursorpos = newcp;
+	return false;
+}
+
+List *
+oid_array_to_list(Datum datum)
+{
+	ArrayType  *array = DatumGetArrayTypeP(datum);
+	Datum	   *values;
+	int			nelems;
+	int			i;
+	List	   *result = NIL;
+
+	deconstruct_array(array,
+					  OIDOID,
+					  sizeof(Oid), true, TYPALIGN_INT,
+					  &values, NULL, &nelems);
+	for (i = 0; i < nelems; i++)
+		result = lappend_oid(result, values[i]);
+	return result;
+}