ygf11 commented on code in PR #5567:
URL: https://github.com/apache/arrow-datafusion/pull/5567#discussion_r1136705258


##########
datafusion/core/tests/sqllogictests/test_files/join_disable_repartition_joins.slt:
##########
@@ -0,0 +1,30 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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.
+
+##########
+## Join Tests
+##########
+
+# turn off repartition_joins
+statement ok
+set datafusion.optimizer.repartition_joins = false;
+
+include ./join.slt
+
+# turn on repartition_joins
+statement ok
+set datafusion.optimizer.repartition_joins = true;

Review Comment:
   > do you guys think we should create a .slt file per use case like disabled 
repartition join? or reuse join.slt?
   
   I think it's worth creating this file now. I first tried adding everything 
to `join.slt` and found a lot of duplicated code, since most tests need to be 
run twice.
   ```sql
   # query x
   statement ok
   set datafusion.optimizer.repartition_joins = false;
   
   query ITI rowsort
   SELECT xxx
   ----
   a a a
   
   # switch to another config
   statement ok
   set datafusion.optimizer.repartition_joins = true;
   
   query ITI rowsort
   SELECT xxx
   ----
   a a a
   ```
   
   Using include reduces a lot of codes, originally the addition was `1100+`, 
now it is `655`.
   For the tests whose setting is complex, we can also add them to `join.slt`.



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