chore(optimizer): add rule/push_down_filter_join unit test (#17676)

* chore(optimizer): rule/push_down_filter_join unit test

* fix clippy warning

Author: BohuTANG

Cargo.lock

@@ -72,5 +72,8 @@ tokio = { workspace = true }
 unicase = { workspace = true }
 url = { workspace = true }
 
+[dev-dependencies]
+pretty_assertions = { workspace = true }
+
 [lints]
 workspace = true

src/query/sql/Cargo.toml

@@ -28,7 +28,7 @@ mod memo;
 #[allow(clippy::module_inception)]
 mod optimizer;
 mod property;
-mod rule;
+pub mod rule;
 pub mod s_expr;
 mod statistics;
 mod util;
@@ -51,7 +51,6 @@ pub use optimizer::OptimizerContext;
 pub use optimizer::RecursiveOptimizer;
 pub use property::*;
 pub use rule::agg_index;
-pub use rule::try_push_down_filter_join;
 pub use rule::RuleFactory;
 pub use rule::RuleID;
 pub use rule::RuleSet;

src/query/sql/src/planner/optimizer/mod.rs

@@ -23,7 +23,7 @@ mod utils;
 
 pub use factory::RuleFactory;
 pub use rewrite::agg_index;
-pub use rewrite::try_push_down_filter_join;
+pub use rewrite::RulePushDownFilterJoin;
 pub use rule::Rule;
 pub use rule::RuleID;
 pub use rule::RulePtr;

src/query/sql/src/planner/optimizer/rule/mod.rs

@@ -62,7 +62,6 @@ pub use rule_merge_filter_into_mutation::RuleMergeFilterIntoMutation;
 pub use rule_normalize_scalar::RuleNormalizeScalarFilter;
 pub use rule_push_down_filter_aggregate::RulePushDownFilterAggregate;
 pub use rule_push_down_filter_eval_scalar::RulePushDownFilterEvalScalar;
-pub use rule_push_down_filter_join::try_push_down_filter_join;
 pub use rule_push_down_filter_join::RulePushDownFilterJoin;
 pub use rule_push_down_filter_project_set::RulePushDownFilterProjectSet;
 pub use rule_push_down_filter_scan::RulePushDownFilterScan;

src/query/sql/src/planner/optimizer/rule/rewrite/mod.rs

@@ -14,3 +14,4 @@
 
 mod filter;
 mod histogram;
+mod rule;

src/query/sql/tests/optimizer/mod.rs

@@ -0,0 +1,15 @@
+// Copyright 2021 Datafuse Labs
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+mod push_down_filter_join_test;