fn plan_drop_schema(
scx: &StatementContext<'_>,
if_exists: bool,
name: &UnresolvedSchemaName,
cascade: bool,
) -> Result<Option<(ResolvedDatabaseSpecifier, SchemaSpecifier)>, PlanError>
fn plan_drop_schema(
scx: &StatementContext<'_>,
if_exists: bool,
name: &UnresolvedSchemaName,
cascade: bool,
) -> Result<Option<(ResolvedDatabaseSpecifier, SchemaSpecifier)>, PlanError>