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https://issues.apache.org/jira/browse/DRILL-8209?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17539603#comment-17539603
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ASF GitHub Bot commented on DRILL-8209:
---------------------------------------
vvysotskyi commented on code in PR #2533:
URL: https://github.com/apache/drill/pull/2533#discussion_r877178392
##########
exec/java-exec/src/main/java/org/apache/drill/exec/planner/logical/DrillDistinctJoinToSemiJoinRule.java:
##########
@@ -0,0 +1,77 @@
+/*
+ * 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.
+ */
+package org.apache.drill.exec.planner.logical;
+
+import org.apache.calcite.plan.RelOptRule;
+import org.apache.calcite.plan.RelOptRuleCall;
+import org.apache.calcite.plan.RelOptUtil;
+import org.apache.calcite.rel.RelNode;
+import org.apache.calcite.rel.core.Join;
+import org.apache.calcite.rel.core.JoinInfo;
+import org.apache.calcite.rel.core.Project;
+import org.apache.calcite.rel.metadata.RelMetadataQuery;
+import org.apache.calcite.runtime.SqlFunctions;
+import org.apache.calcite.tools.RelBuilder;
+import org.apache.calcite.util.ImmutableBitSet;
+import org.apache.drill.exec.physical.impl.join.JoinUtils;
+
+/**
+ * Converts join with distinct right input to semi-join.
+ */
+public class DrillDistinctJoinToSemiJoinRule extends RelOptRule {
Review Comment:
It is a new one
> Introduce rule for converting join with distinct input to semi-join
> -------------------------------------------------------------------
>
> Key: DRILL-8209
> URL: https://issues.apache.org/jira/browse/DRILL-8209
> Project: Apache Drill
> Issue Type: Sub-task
> Reporter: Vova Vysotskyi
> Assignee: Vova Vysotskyi
> Priority: Major
>
> Newer Calcite changed the order of applying rules. AggregateRemoveRule is
> applied before SemiJoinRule, so SemiJoinRule cannot be applied later, since
> aggregate is pruned from planning.
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