fn collect_local_correlated_cols(
plan: &LogicalPlan,
all_cols_map: &HashMap<LogicalPlan, BTreeSet<Column>>,
local_cols: &mut BTreeSet<Column>,
)fn collect_local_correlated_cols(
plan: &LogicalPlan,
all_cols_map: &HashMap<LogicalPlan, BTreeSet<Column>>,
local_cols: &mut BTreeSet<Column>,
)