alamb commented on code in PR #2729:
URL: https://github.com/apache/arrow-datafusion/pull/2729#discussion_r897292665
##########
datafusion/optimizer/src/filter_push_down.rs:
##########
@@ -1831,4 +1870,111 @@ mod tests {
Ok(())
}
+
Review Comment:
When I remove the code changes in this PR the tests still pass 🤔
So when I apply this diff:
```diff
diff --git a/datafusion/optimizer/src/filter_push_down.rs
b/datafusion/optimizer/src/filter_push_down.rs
index 1629e95c5..2668eaaf7 100644
--- a/datafusion/optimizer/src/filter_push_down.rs
+++ b/datafusion/optimizer/src/filter_push_down.rs
@@ -122,27 +122,6 @@ fn remove_filters(
.collect::<Vec<_>>()
}
-// rename all filter columns which have alias name
-fn rename_filters_column_name(
- filters: &mut [Predicate],
- alias_cols_expr_and_name: &HashMap<&Expr, &String>,
-) {
- for (expr, columns) in filters {
- if alias_cols_expr_and_name.contains_key(expr) {
- let col_string = <&std::string::String>::clone(
- alias_cols_expr_and_name.get(expr).unwrap(),
- );
- let column = Column::from_qualified_name(col_string);
- if let Expr::Column(col) = expr {
- columns.remove(col);
- } else {
- unreachable!()
- }
- columns.insert(column);
- }
- }
-}
-
/// builds a new [LogicalPlan] from `plan` by issuing new
[LogicalPlan::Filter] if any of the filters
/// in `state` depend on the columns `used_columns`.
fn issue_filters(
@@ -357,18 +336,6 @@ fn optimize(plan: &LogicalPlan, mut state: State) ->
Result<LogicalPlan> {
LogicalPlan::Analyze { .. } => push_down(&state, plan),
LogicalPlan::Filter(Filter { input, predicate }) => {
let mut predicates = vec![];
- let mut alias_cols_expr_and_name = HashMap::new();
- //Need rewrite column name before push down
- let input_plan = &*input.clone();
- if let LogicalPlan::Projection(projection) = input_plan {
- let exprs = &projection.expr;
- for e in exprs {
- if let Expr::Alias(col_expr, alias_name) = e {
- alias_cols_expr_and_name.insert(col_expr.as_ref(),
alias_name);
- }
- }
- }
-
utils::split_conjunction(predicate, &mut predicates);
// Predicates without referencing columns (WHERE FALSE, WHERE
1=1, etc.)
@@ -397,12 +364,6 @@ fn optimize(plan: &LogicalPlan, mut state: State) ->
Result<LogicalPlan> {
&no_col_predicates,
))
} else {
- if !alias_cols_expr_and_name.is_empty() {
- rename_filters_column_name(
- &mut state.filters,
- &alias_cols_expr_and_name,
- )
- }
optimize(input, state)
}
}
```
The tests all pass:
```
-*- mode: compilation; default-directory: "~/Software/arrow-datafusion/" -*-
Compilation started at Tue Jun 14 16:27:52
cd /Users/alamb/Software/arrow-datafusion && RUST_BACKTRACE=1
CARGO_TARGET_DIR=/Users/alamb/Software/df-target cargo test -p
datafusion-optimizer -- filter_push_down
Compiling datafusion-optimizer v9.0.0
(/Users/alamb/Software/arrow-datafusion/datafusion/optimizer)
Finished test [unoptimized + debuginfo] target(s) in 4.38s
Running unittests src/lib.rs
(/Users/alamb/Software/df-target/debug/deps/datafusion_optimizer-ad133d04102e7238)
running 39 tests
test filter_push_down::tests::filter_no_columns ... ok
test filter_push_down::tests::filter_before_projection ... ok
test filter_push_down::tests::alias ... ok
test filter_push_down::tests::filter_jump_2_plans ... ok
test filter_push_down::tests::filter_after_limit ... ok
test filter_push_down::tests::complex_expression ... ok
test filter_push_down::tests::filter_keep_agg ... ok
test filter_push_down::tests::filter_move_agg ... ok
test filter_push_down::tests::complex_plan ... ok
test filter_push_down::tests::filter_2_breaks_limits ... ok
test filter_push_down::tests::double_limit ... ok
test filter_push_down::tests::filter_using_left_join ... ok
test filter_push_down::tests::filter_on_join_on_common_independent ... ok
test filter_push_down::tests::filter_join_on_one_side ... ok
test filter_push_down::tests::filter_join_on_common_dependent ... ok
test filter_push_down::tests::filter_with_table_provider_exact ... ok
test filter_push_down::tests::filter_using_join_on_common_independent ... ok
test filter_push_down::tests::filter_with_table_provider_inexact ... ok
test filter_push_down::tests::filter_using_left_join_on_common ... ok
test filter_push_down::tests::filter_with_table_provider_unsupported ... ok
test filter_push_down::tests::filters_user_defined_node ... ok
test
filter_push_down::tests::filter_with_table_provider_multiple_invocations ... ok
test filter_push_down::tests::filter_using_right_join ... ok
test filter_push_down::tests::filter_using_right_join_on_common ... ok
test filter_push_down::tests::full_join_on_with_filter ... ok
test filter_push_down::tests::multi_combined_filter ... ok
test filter_push_down::tests::join_filter_on_common ... ok
test filter_push_down::tests::join_filter_with_alias ... ok
test filter_push_down::tests::join_filter_removed ... ok
test filter_push_down::tests::left_join_on_with_filter ... ok
test filter_push_down::tests::join_on_with_filter ... ok
test filter_push_down::tests::test_filter_with_alias ... ok
test filter_push_down::tests::test_filter_with_multi_alias ... ok
test filter_push_down::tests::two_filters_on_same_depth ... ok
test filter_push_down::tests::union_all ... ok
test filter_push_down::tests::union_all_with_alias ... ok
test filter_push_down::tests::multi_filter ... ok
test filter_push_down::tests::split_filter ... ok
test filter_push_down::tests::right_join_on_with_filter ... ok
test result: ok. 39 passed; 0 failed; 0 ignored; 0 measured; 118 filtered
out; finished in 0.07s
Doc-tests datafusion_optimizer
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 2 filtered out;
finished in 0.00s
Compilation finished at Tue Jun 14 16:27:56
```
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