Add routines in namespace.c to determine whether objects are visible

in the search path.  (We might want to make these available as SQL
functions too, but I haven't done that yet.)  Fix format_type to be
schema-aware.

src/backend/catalog/namespace.c

@@ -13,7 +13,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/catalog/namespace.c,v 1.16 2002/04/30 01:26:25 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/catalog/namespace.c,v 1.17 2002/05/01 23:06:41 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -31,6 +31,7 @@
 #include "catalog/pg_operator.h"
 #include "catalog/pg_proc.h"
 #include "catalog/pg_shadow.h"
+#include "catalog/pg_type.h"
 #include "lib/stringinfo.h"
 #include "miscadmin.h"
 #include "nodes/makefuncs.h"
@@ -296,6 +297,56 @@ RelnameGetRelid(const char *relname)
 	return InvalidOid;
 }
 
+/*
+ * RelationIsVisible
+ *		Determine whether a relation (identified by OID) is visible in the
+ *		current search path.  Visible means "would be found by searching
+ *		for the unqualified relation name".
+ */
+bool
+RelationIsVisible(Oid relid)
+{
+	HeapTuple	reltup;
+	Form_pg_class relform;
+	Oid			relnamespace;
+	bool		visible;
+
+	recomputeNamespacePath();
+
+	reltup = SearchSysCache(RELOID,
+							ObjectIdGetDatum(relid),
+							0, 0, 0);
+	if (!HeapTupleIsValid(reltup))
+		elog(ERROR, "Cache lookup failed for relation %u", relid);
+	relform = (Form_pg_class) GETSTRUCT(reltup);
+
+	/*
+	 * Quick check: if it ain't in the path at all, it ain't visible.
+	 */
+	relnamespace = relform->relnamespace;
+	if (relnamespace != myTempNamespace &&
+		relnamespace != PG_CATALOG_NAMESPACE &&
+		!intMember(relnamespace, namespaceSearchPath))
+		visible = false;
+	else
+	{
+		/*
+		 * If it is in the path, it might still not be visible; it could be
+		 * hidden by another relation of the same name earlier in the path.
+		 * So we must do a slow check to see if this rel would be found by
+		 * RelnameGetRelid.
+		 */
+		char	   *relname = NameStr(relform->relname);
+
+		visible = (RelnameGetRelid(relname) == relid);
+	}
+
+	ReleaseSysCache(reltup);
+
+	return visible;
+}
+
+
 /*
  * TypenameGetTypid
  *		Try to resolve an unqualified datatype name.
@@ -346,55 +397,54 @@ TypenameGetTypid(const char *typname)
 }
 
 /*
- * OpclassnameGetOpcid
+ * TypeIsVisible
- *		Try to resolve an unqualified index opclass name.
+ *		Determine whether a type (identified by OID) is visible in the
- *		Returns OID if opclass found in search path, else InvalidOid.
+ *		current search path.  Visible means "would be found by searching
- *
+ *		for the unqualified type name".
- * This is essentially the same as TypenameGetTypid, but we have to have
- * an extra argument for the index AM OID.
  */
-Oid
+bool
-OpclassnameGetOpcid(Oid amid, const char *opcname)
+TypeIsVisible(Oid typid)
 {
-	Oid			opcid;
+	HeapTuple	typtup;
-	List	   *lptr;
+	Form_pg_type typform;
+	Oid			typnamespace;
+	bool		visible;
 
 	recomputeNamespacePath();
 
-	/*
+	typtup = SearchSysCache(TYPEOID,
-	 * If system namespace is not in path, implicitly search it before path
+							ObjectIdGetDatum(typid),
-	 */
+							0, 0, 0);
-	if (!pathContainsSystemNamespace)
+	if (!HeapTupleIsValid(typtup))
-	{
+		elog(ERROR, "Cache lookup failed for type %u", typid);
-		opcid = GetSysCacheOid(CLAAMNAMENSP,
+	typform = (Form_pg_type) GETSTRUCT(typtup);
-							   ObjectIdGetDatum(amid),
-							   PointerGetDatum(opcname),
-							   ObjectIdGetDatum(PG_CATALOG_NAMESPACE),
-							   0);
-		if (OidIsValid(opcid))
-			return opcid;
-	}
 
 	/*
-	 * Else search the path
+	 * Quick check: if it ain't in the path at all, it ain't visible.
 	 */
-	foreach(lptr, namespaceSearchPath)
+	typnamespace = typform->typnamespace;
+	if (typnamespace != PG_CATALOG_NAMESPACE &&
+		!intMember(typnamespace, namespaceSearchPath))
+		visible = false;
+	else
 	{
-		Oid			namespaceId = (Oid) lfirsti(lptr);
+		/*
+		 * If it is in the path, it might still not be visible; it could be
+		 * hidden by another type of the same name earlier in the path.
+		 * So we must do a slow check to see if this type would be found by
+		 * TypenameGetTypid.
+		 */
+		char	   *typname = NameStr(typform->typname);
 
-		opcid = GetSysCacheOid(CLAAMNAMENSP,
+		visible = (TypenameGetTypid(typname) == typid);
-							   ObjectIdGetDatum(amid),
-							   PointerGetDatum(opcname),
-							   ObjectIdGetDatum(namespaceId),
-							   0);
-		if (OidIsValid(opcid))
-			return opcid;
 	}
 
-	/* Not found in path */
+	ReleaseSysCache(typtup);
-	return InvalidOid;
+
+	return visible;
 }
 
+
 /*
  * FuncnameGetCandidates
  *		Given a possibly-qualified function name and argument count,
@@ -582,6 +632,70 @@ FuncnameGetCandidates(List *names, int nargs)
 	return resultList;
 }
 
+/*
+ * FunctionIsVisible
+ *		Determine whether a function (identified by OID) is visible in the
+ *		current search path.  Visible means "would be found by searching
+ *		for the unqualified function name with exact argument matches".
+ */
+bool
+FunctionIsVisible(Oid funcid)
+{
+	HeapTuple	proctup;
+	Form_pg_proc procform;
+	Oid			pronamespace;
+	bool		visible;
+
+	recomputeNamespacePath();
+
+	proctup = SearchSysCache(PROCOID,
+							 ObjectIdGetDatum(funcid),
+							 0, 0, 0);
+	if (!HeapTupleIsValid(proctup))
+		elog(ERROR, "Cache lookup failed for procedure %u", funcid);
+	procform = (Form_pg_proc) GETSTRUCT(proctup);
+
+	/*
+	 * Quick check: if it ain't in the path at all, it ain't visible.
+	 */
+	pronamespace = procform->pronamespace;
+	if (pronamespace != PG_CATALOG_NAMESPACE &&
+		!intMember(pronamespace, namespaceSearchPath))
+		visible = false;
+	else
+	{
+		/*
+		 * If it is in the path, it might still not be visible; it could be
+		 * hidden by another proc of the same name and arguments earlier
+		 * in the path.  So we must do a slow check to see if this is the
+		 * same proc that would be found by FuncnameGetCandidates.
+		 */
+		char	   *proname = NameStr(procform->proname);
+		int			nargs = procform->pronargs;
+		FuncCandidateList clist;
+
+		visible = false;
+
+		clist = FuncnameGetCandidates(makeList1(makeString(proname)), nargs);
+
+		for (; clist; clist = clist->next)
+		{
+			if (memcmp(clist->args, procform->proargtypes,
+					   nargs * sizeof(Oid)) == 0)
+			{
+				/* Found the expected entry; is it the right proc? */
+				visible = (clist->oid == funcid);
+				break;
+			}
+		}
+	}
+
+	ReleaseSysCache(proctup);
+
+	return visible;
+}
+
+
 /*
  * OpernameGetCandidates
  *		Given a possibly-qualified operator name and operator kind,
@@ -765,6 +879,70 @@ OpernameGetCandidates(List *names, char oprkind)
 	return resultList;
 }
 
+/*
+ * OperatorIsVisible
+ *		Determine whether an operator (identified by OID) is visible in the
+ *		current search path.  Visible means "would be found by searching
+ *		for the unqualified operator name with exact argument matches".
+ */
+bool
+OperatorIsVisible(Oid oprid)
+{
+	HeapTuple	oprtup;
+	Form_pg_operator oprform;
+	Oid			oprnamespace;
+	bool		visible;
+
+	recomputeNamespacePath();
+
+	oprtup = SearchSysCache(OPEROID,
+							ObjectIdGetDatum(oprid),
+							0, 0, 0);
+	if (!HeapTupleIsValid(oprtup))
+		elog(ERROR, "Cache lookup failed for operator %u", oprid);
+	oprform = (Form_pg_operator) GETSTRUCT(oprtup);
+
+	/*
+	 * Quick check: if it ain't in the path at all, it ain't visible.
+	 */
+	oprnamespace = oprform->oprnamespace;
+	if (oprnamespace != PG_CATALOG_NAMESPACE &&
+		!intMember(oprnamespace, namespaceSearchPath))
+		visible = false;
+	else
+	{
+		/*
+		 * If it is in the path, it might still not be visible; it could be
+		 * hidden by another operator of the same name and arguments earlier
+		 * in the path.  So we must do a slow check to see if this is the
+		 * same operator that would be found by OpernameGetCandidates.
+		 */
+		char	   *oprname = NameStr(oprform->oprname);
+		FuncCandidateList clist;
+
+		visible = false;
+
+		clist = OpernameGetCandidates(makeList1(makeString(oprname)),
+									  oprform->oprkind);
+
+		for (; clist; clist = clist->next)
+		{
+			if (clist->args[0] == oprform->oprleft &&
+				clist->args[1] == oprform->oprright)
+			{
+				/* Found the expected entry; is it the right op? */
+				visible = (clist->oid == oprid);
+				break;
+			}
+		}
+	}
+
+	ReleaseSysCache(oprtup);
+
+	return visible;
+}
+
+
 /*
  * OpclassGetCandidates
  *		Given an index access method OID, retrieve a list of all the
@@ -883,6 +1061,104 @@ OpclassGetCandidates(Oid amid)
 	return resultList;
 }
 
+/*
+ * OpclassnameGetOpcid
+ *		Try to resolve an unqualified index opclass name.
+ *		Returns OID if opclass found in search path, else InvalidOid.
+ *
+ * This is essentially the same as TypenameGetTypid, but we have to have
+ * an extra argument for the index AM OID.
+ */
+Oid
+OpclassnameGetOpcid(Oid amid, const char *opcname)
+{
+	Oid			opcid;
+	List	   *lptr;
+
+	recomputeNamespacePath();
+
+	/*
+	 * If system namespace is not in path, implicitly search it before path
+	 */
+	if (!pathContainsSystemNamespace)
+	{
+		opcid = GetSysCacheOid(CLAAMNAMENSP,
+							   ObjectIdGetDatum(amid),
+							   PointerGetDatum(opcname),
+							   ObjectIdGetDatum(PG_CATALOG_NAMESPACE),
+							   0);
+		if (OidIsValid(opcid))
+			return opcid;
+	}
+
+	/*
+	 * Else search the path
+	 */
+	foreach(lptr, namespaceSearchPath)
+	{
+		Oid			namespaceId = (Oid) lfirsti(lptr);
+
+		opcid = GetSysCacheOid(CLAAMNAMENSP,
+							   ObjectIdGetDatum(amid),
+							   PointerGetDatum(opcname),
+							   ObjectIdGetDatum(namespaceId),
+							   0);
+		if (OidIsValid(opcid))
+			return opcid;
+	}
+
+	/* Not found in path */
+	return InvalidOid;
+}
+
+/*
+ * OpclassIsVisible
+ *		Determine whether an opclass (identified by OID) is visible in the
+ *		current search path.  Visible means "would be found by searching
+ *		for the unqualified opclass name".
+ */
+bool
+OpclassIsVisible(Oid opcid)
+{
+	HeapTuple	opctup;
+	Form_pg_opclass opcform;
+	Oid			opcnamespace;
+	bool		visible;
+
+	recomputeNamespacePath();
+
+	opctup = SearchSysCache(CLAOID,
+							ObjectIdGetDatum(opcid),
+							0, 0, 0);
+	if (!HeapTupleIsValid(opctup))
+		elog(ERROR, "Cache lookup failed for opclass %u", opcid);
+	opcform = (Form_pg_opclass) GETSTRUCT(opctup);
+
+	/*
+	 * Quick check: if it ain't in the path at all, it ain't visible.
+	 */
+	opcnamespace = opcform->opcnamespace;
+	if (opcnamespace != PG_CATALOG_NAMESPACE &&
+		!intMember(opcnamespace, namespaceSearchPath))
+		visible = false;
+	else
+	{
+		/*
+		 * If it is in the path, it might still not be visible; it could be
+		 * hidden by another opclass of the same name earlier in the path.
+		 * So we must do a slow check to see if this opclass would be found by
+		 * OpclassnameGetOpcid.
+		 */
+		char	   *opcname = NameStr(opcform->opcname);
+
+		visible = (OpclassnameGetOpcid(opcform->opcamid, opcname) == opcid);
+	}
+
+	ReleaseSysCache(opctup);
+
+	return visible;
+}
+
 
 /*
  * QualifiedNameGetCreationNamespace
@@ -1016,6 +1292,7 @@ isTempNamespace(Oid namespaceId)
 	return false;
 }
 
+
 /*
  * recomputeNamespacePath - recompute path derived variables if needed.
  */
@@ -1453,6 +1730,7 @@ RemoveTempRelationsCallback(void)
 	}
 }
 
+
 /*
  * Routines for handling the GUC variable 'search_path'.
  */

src/backend/utils/adt/format_type.c

@@ -8,7 +8,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/adt/format_type.c,v 1.28 2002/03/20 19:44:40 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/adt/format_type.c,v 1.29 2002/05/01 23:06:41 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -17,11 +17,13 @@
 
 #include <ctype.h>
 
-#include "fmgr.h"
+#include "catalog/namespace.h"
 #include "catalog/pg_type.h"
+#include "fmgr.h"
 #include "utils/builtins.h"
 #include "utils/datetime.h"
 #include "utils/numeric.h"
+#include "utils/lsyscache.h"
 #include "utils/syscache.h"
 #ifdef MULTIBYTE
 #include "mb/pg_wchar.h"
@@ -47,7 +49,7 @@ __attribute__((format(printf, 2, 3)));
  * pg_attribute.atttypmod. This function will get the type name and
  * format it and the modifier to canonical SQL format, if the type is
  * a standard type. Otherwise you just get pg_type.typname back,
- * double quoted if it contains funny characters.
+ * double quoted if it contains funny characters or matches a keyword.
  *
  * If typemod is NULL then we are formatting a type name in a context where
  * no typemod is available, eg a function argument or result type.  This
@@ -121,11 +123,9 @@ format_type_internal(Oid type_oid, int32 typemod,
 {
 	bool		with_typemod = typemod_given && (typemod >= 0);
 	HeapTuple	tuple;
+	Form_pg_type typeform;
 	Oid			array_base_type;
-	int16		typlen;
-	char		typtype;
 	bool		is_array;
-	char	   *name;
 	char	   *buf;
 
 	if (type_oid == InvalidOid && allow_invalid)
@@ -142,17 +142,18 @@ format_type_internal(Oid type_oid, int32 typemod,
 			elog(ERROR, "could not locate data type with oid %u in catalog",
 				 type_oid);
 	}
+	typeform = (Form_pg_type) GETSTRUCT(tuple);
 
 	/*
 	 * 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.
 	 */
-	array_base_type = ((Form_pg_type) GETSTRUCT(tuple))->typelem;
+	array_base_type = typeform->typelem;
-	typlen = ((Form_pg_type) GETSTRUCT(tuple))->typlen;
-	typtype = ((Form_pg_type) GETSTRUCT(tuple))->typtype;
 
-	if (array_base_type != InvalidOid && typlen < 0 && typtype != 'd')
+	if (array_base_type != InvalidOid &&
+		typeform->typlen < 0 &&
+		typeform->typtype != 'd')
 	{
 		/* Switch our attention to the array element type */
 		ReleaseSysCache(tuple);
@@ -167,12 +168,26 @@ format_type_internal(Oid type_oid, int32 typemod,
 				elog(ERROR, "could not locate data type with oid %u in catalog",
 					 type_oid);
 		}
-		is_array = true;
+		typeform = (Form_pg_type) GETSTRUCT(tuple);
 		type_oid = array_base_type;
+		is_array = true;
 	}
 	else
 		is_array = false;
 
+	/*
+	 * See if we want to special-case the output for certain built-in types.
+	 * Note that these special cases should all correspond to special
+	 * productions in gram.y, to ensure that the type name will be taken as
+	 * a system type, not a user type of the same name.
+	 *
+	 * If we do not provide a special-case output here, the type name will
+	 * be handled the same way as a user type name --- in particular, it
+	 * will be double-quoted if it matches any lexer keyword.  This behavior
+	 * is essential for some cases, such as types "bit" and "char".
+	 */
+	buf = NULL;					/* flag for no special case */
+
 	switch (type_oid)
 	{
 		case BITOID:
@@ -186,7 +201,6 @@ format_type_internal(Oid type_oid, int32 typemod,
 				 * BIT(1) per SQL spec.  Report it as the quoted typename
 				 * so that parser will not assign a bogus typmod.
 				 */
-				buf = pstrdup("\"bit\"");
 			}
 			else
 				buf = pstrdup("bit");
@@ -207,20 +221,11 @@ format_type_internal(Oid type_oid, int32 typemod,
 				 * which means CHARACTER(1) per SQL spec.  Report it as
 				 * bpchar so that parser will not assign a bogus typmod.
 				 */
-				buf = pstrdup("bpchar");
 			}
 			else
 				buf = pstrdup("character");
 			break;
 
-		case CHAROID:
-			/*
-			 * This char type is the single-byte version. You have to
-			 * double-quote it to get at it in the parser.
-			 */
-			buf = pstrdup("\"char\"");
-			break;
-
 		case FLOAT4OID:
 			buf = pstrdup("real");
 			break;
@@ -365,19 +370,27 @@ format_type_internal(Oid type_oid, int32 typemod,
 			else
 				buf = pstrdup("character varying");
 			break;
+	}
 
-		default:
+	if (buf == NULL)
-			name = NameStr(((Form_pg_type) GETSTRUCT(tuple))->typname);
+	{
 		/*
-			 * Double-quote the name if it's not a standard identifier.
+		 * Default handling: report the name as it appears in the catalog.
-			 * Note this is *necessary* for ruleutils.c's use.
+		 * Here, we must qualify the name if it is not visible in the search
+		 * path, and we must double-quote it if it's not a standard identifier
+		 * or if it matches any keyword.
 		 */
-			if (strspn(name, "abcdefghijklmnopqrstuvwxyz0123456789_") != strlen(name)
+		char	   *nspname;
-				|| isdigit((unsigned char) name[0]))
+		char	   *typname;
-				buf = psnprintf(strlen(name) + 3, "\"%s\"", name);
+
+		if (TypeIsVisible(type_oid))
+			nspname = NULL;
 		else
-				buf = pstrdup(name);
+			nspname = get_namespace_name(typeform->typnamespace);
-			break;
+
+		typname = NameStr(typeform->typname);
+
+		buf = quote_qualified_identifier(nspname, typname);
 	}
 
 	if (is_array)

src/backend/utils/adt/regproc.c

@@ -13,7 +13,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/adt/regproc.c,v 1.66 2002/04/25 02:56:55 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/adt/regproc.c,v 1.67 2002/05/01 23:06:41 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -307,31 +307,21 @@ regprocedureout(PG_FUNCTION_ARGS)
 		int			nargs = procform->pronargs;
 		int			i;
 		char	   *nspname;
-		FuncCandidateList clist;
 		StringInfoData buf;
 
 		/* XXX no support here for bootstrap mode */
 
+		initStringInfo(&buf);
+
 		/*
 		 * Would this proc be found (given the right args) by regprocedurein?
 		 * If not, we need to qualify it.
 		 */
-		clist = FuncnameGetCandidates(makeList1(makeString(proname)), nargs);
+		if (FunctionIsVisible(proid))
-
-		for (; clist; clist = clist->next)
-		{
-			if (memcmp(clist->args, procform->proargtypes,
-					   nargs * sizeof(Oid)) == 0)
-				break;
-		}
-
-		if (clist != NULL && clist->oid == proid)
 			nspname = NULL;
 		else
 			nspname = get_namespace_name(procform->pronamespace);
 
-		initStringInfo(&buf);
-
 		appendStringInfo(&buf, "%s(",
 						 quote_qualified_identifier(nspname, proname));
 		for (i = 0; i < nargs; i++)
@@ -632,28 +622,17 @@ regoperatorout(PG_FUNCTION_ARGS)
 		Form_pg_operator operform = (Form_pg_operator) GETSTRUCT(opertup);
 		char	   *oprname = NameStr(operform->oprname);
 		char	   *nspname;
-		FuncCandidateList clist;
 		StringInfoData buf;
 
 		/* XXX no support here for bootstrap mode */
 
+		initStringInfo(&buf);
+
 		/*
 		 * Would this oper be found (given the right args) by regoperatorin?
 		 * If not, we need to qualify it.
 		 */
-		clist = OpernameGetCandidates(makeList1(makeString(oprname)),
+		if (!OperatorIsVisible(oprid))
-									  operform->oprkind);
-
-		for (; clist; clist = clist->next)
-		{
-			if (clist->args[0] == operform->oprleft &&
-				clist->args[1] == operform->oprright)
-				break;
-		}
-
-		initStringInfo(&buf);
-
-		if (clist == NULL || clist->oid != oprid)
 		{
 			nspname = get_namespace_name(operform->oprnamespace);
 			appendStringInfo(&buf, "%s.",
@@ -815,7 +794,7 @@ regclassout(PG_FUNCTION_ARGS)
 			 * Would this class be found by regclassin?
 			 * If not, qualify it.
 			 */
-			if (RelnameGetRelid(classname) == classid)
+			if (RelationIsVisible(classid))
 				nspname = NULL;
 			else
 				nspname = get_namespace_name(classform->relnamespace);
@@ -947,7 +926,6 @@ regtypeout(PG_FUNCTION_ARGS)
 	if (HeapTupleIsValid(typetup))
 	{
 		Form_pg_type typeform = (Form_pg_type) GETSTRUCT(typetup);
-		char	   *typname = NameStr(typeform->typname);
 
 		/*
 		 * In bootstrap mode, skip the fancy namespace stuff and just
@@ -956,24 +934,13 @@ regtypeout(PG_FUNCTION_ARGS)
 		 */
 		if (IsBootstrapProcessingMode())
 		{
+			char	   *typname = NameStr(typeform->typname);
+
 			result = pstrdup(typname);
 		}
 		else
 		{
-			char	   *nspname;
+			result = format_type_be(typid);
-
-			/*
-			 * Would this type be found by regtypein?
-			 * If not, qualify it.
-			 *
-			 * XXX shouldn't we use format_type instead?
-			 */
-			if (TypenameGetTypid(typname) == typid)
-				nspname = NULL;
-			else
-				nspname = get_namespace_name(typeform->typnamespace);
-
-			result = quote_qualified_identifier(nspname, typname);
 		}
 
 		ReleaseSysCache(typetup);

src/include/catalog/namespace.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: namespace.h,v 1.11 2002/04/26 01:24:08 tgl Exp $
+ * $Id: namespace.h,v 1.12 2002/05/01 23:06:41 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -49,25 +49,25 @@ typedef struct _OpclassCandidateList
 
 
 extern Oid	RangeVarGetRelid(const RangeVar *relation, bool failOK);
-
 extern Oid	RangeVarGetCreationNamespace(const RangeVar *newRelation);
-
 extern Oid	RelnameGetRelid(const char *relname);
+extern bool RelationIsVisible(Oid relid);
 
 extern Oid	TypenameGetTypid(const char *typname);
-
+extern bool TypeIsVisible(Oid typid);
-extern Oid	OpclassnameGetOpcid(Oid amid, const char *opcname);
 
 extern FuncCandidateList FuncnameGetCandidates(List *names, int nargs);
+extern bool FunctionIsVisible(Oid funcid);
 
 extern FuncCandidateList OpernameGetCandidates(List *names, char oprkind);
+extern bool OperatorIsVisible(Oid oprid);
 
 extern OpclassCandidateList OpclassGetCandidates(Oid amid);
+extern Oid	OpclassnameGetOpcid(Oid amid, const char *opcname);
+extern bool OpclassIsVisible(Oid opcid);
 
 extern Oid	QualifiedNameGetCreationNamespace(List *names, char **objname_p);
-
 extern RangeVar *makeRangeVarFromNameList(List *names);
-
 extern char *NameListToString(List *names);
 
 extern bool isTempNamespace(Oid namespaceId);