Fix variable initialization with ALTER SUBSCRIPTION DROP PUBLICATION
copy_data is not a supported option with this sub-command of ALTER
SUBSCRIPTION, which would not make a variable related to it initialized
after parsing the option set in DefElems.  A refresh could then refer to
it.
Author: Ranier Vilela
Discussion:
@@ -949,7 +949,7 @@ AlterSubscription(AlterSubscriptionStmt *stmt, bool isTopLevel)
case ALTER_SUBSCRIPTION_DROP_PUBLICATION:
{
bool isadd = stmt->kind == ALTER_SUBSCRIPTION_ADD_PUBLICATION;
- bool copy_data;
+ bool copy_data = false;
bool refresh;
List *publist;
