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-rw-r--r--src/backend/commands/tablecmds.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c
index 029d33a223d..142419f2cca 100644
--- a/src/backend/commands/tablecmds.c
+++ b/src/backend/commands/tablecmds.c
@@ -6751,7 +6751,8 @@ ATPrepAlterColumnType(List **wqueue,
else if (transform)
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
- errmsg("ALTER TYPE USING is only supported on plain tables")));
+ errmsg("\"%s\" is not a table",
+ RelationGetRelationName(rel))));
if (tab->relkind == RELKIND_COMPOSITE_TYPE ||
tab->relkind == RELKIND_FOREIGN_TABLE)