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https://issues.apache.org/jira/browse/DRILL-6321?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16475236#comment-16475236
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ASF GitHub Bot commented on DRILL-6321:
---------------------------------------
amansinha100 commented on a change in pull request #1258: DRILL-6321: Lateral
Join and Unnest - initial implementation for parser and planning
URL: https://github.com/apache/drill/pull/1258#discussion_r188152596
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/planner/common/DrillCorrelateRelBase.java
##########
@@ -0,0 +1,55 @@
+/*
+ * 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.common;
+
+import org.apache.calcite.plan.RelOptCluster;
+import org.apache.calcite.plan.RelOptCost;
+import org.apache.calcite.plan.RelOptPlanner;
+import org.apache.calcite.plan.RelTraitSet;
+import org.apache.calcite.rel.RelNode;
+import org.apache.calcite.rel.core.Correlate;
+import org.apache.calcite.rel.core.CorrelationId;
+import org.apache.calcite.rel.metadata.RelMetadataQuery;
+import org.apache.calcite.sql.SemiJoinType;
+import org.apache.calcite.util.ImmutableBitSet;
+import org.apache.drill.exec.ExecConstants;
+import org.apache.drill.exec.planner.cost.DrillCostBase;
+import org.apache.drill.exec.planner.physical.PrelUtil;
+
+
+public abstract class DrillCorrelateRelBase extends Correlate implements
DrillRelNode {
+ public DrillCorrelateRelBase(RelOptCluster cluster, RelTraitSet traits,
RelNode left, RelNode right,
+ CorrelationId correlationId, ImmutableBitSet
requiredColumns, SemiJoinType semiJoinType) {
+ super(cluster, traits, left, right, correlationId, requiredColumns,
semiJoinType);
+ }
+
+ @Override public RelOptCost computeSelfCost(RelOptPlanner planner,
+ RelMetadataQuery mq) {
+ DrillCostBase.DrillCostFactory costFactory =
(DrillCostBase.DrillCostFactory) planner.getCostFactory();
+
+ double rowCount = mq.getRowCount(this.getLeft());
Review comment:
Since correlate (lateral join) is a cross join, the actual rowCount = left
row count x estimated right row count.
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> Lateral Join: Planning changes - enable submitting physical plan
> ----------------------------------------------------------------
>
> Key: DRILL-6321
> URL: https://issues.apache.org/jira/browse/DRILL-6321
> Project: Apache Drill
> Issue Type: Task
> Reporter: Parth Chandra
> Assignee: Chunhui Shi
> Priority: Major
> Labels: ready-to-commit
> Fix For: 1.14.0
>
>
> Implement changes to enable submitting a physical plan containing lateral and
> unnest.
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