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Before attempting to create a composite type, check whether a type of that

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name already exists, so we'd get an error message about a "type" instead
of about a "relation", because the composite type code shares code with
relation creation.
This commit is contained in:
Peter Eisentraut 2010-01-20 05:47:09 +00:00
parent 60e2fdf092
commit eb210ce85a
1 changed files with 23 additions and 2 deletions
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25
src/backend/commands/typecmds.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/typecmds.c,v 1.145 2010/01/02 16:57:39 momjian Exp $
* $PostgreSQL: pgsql/src/backend/commands/typecmds.c,v 1.146 2010/01/20 05:47:09 petere Exp $
*
* DESCRIPTION
* The "DefineFoo" routines take the parse tree and pick out the
@ -1509,6 +1509,8 @@ Oid
DefineCompositeType(const RangeVar *typevar, List *coldeflist)
{
CreateStmt *createStmt = makeNode(CreateStmt);
Oid old_type_oid;
Oid typeNamespace;
if (coldeflist == NIL)
ereport(ERROR,
@ -1528,7 +1530,26 @@ DefineCompositeType(const RangeVar *typevar, List *coldeflist)
createStmt->tablespacename = NULL;
/*
* finally create the relation...
* Check for collision with an existing type name. If there is one
* and it's an autogenerated array, we can rename it out of the
* way. This check is here mainly to get a better error message
* about a "type" instead of below about a "relation".
*/
typeNamespace = RangeVarGetCreationNamespace(createStmt->relation);
old_type_oid = GetSysCacheOid(TYPENAMENSP,
CStringGetDatum(createStmt->relation->relname),
ObjectIdGetDatum(typeNamespace),
0, 0);
if (OidIsValid(old_type_oid))
{
if (!moveArrayTypeName(old_type_oid, createStmt->relation->relname, typeNamespace))
ereport(ERROR,
(errcode(ERRCODE_DUPLICATE_OBJECT),
errmsg("type \"%s\" already exists", createStmt->relation->relname)));
}
/*
* Finally create the relation. This also creates the type.
*/
return DefineRelation(createStmt, RELKIND_COMPOSITE_TYPE);
}