[
https://issues.apache.org/jira/browse/HIVE-23389?focusedWorklogId=432464&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-432464
]
ASF GitHub Bot logged work on HIVE-23389:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 10/May/20 01:22
Start Date: 10/May/20 01:22
Worklog Time Spent: 10m
Work Description: jcamachor commented on a change in pull request #1010:
URL: https://github.com/apache/hive/pull/1010#discussion_r422568569
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/rules/HiveFilterMergeRule.java
##########
@@ -0,0 +1,117 @@
+/*
+ * 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.hadoop.hive.ql.optimizer.calcite.rules;
+
+import java.util.List;
+import org.apache.calcite.plan.RelOptRule;
+import org.apache.calcite.plan.RelOptRuleCall;
+import org.apache.calcite.rel.core.Filter;
+import org.apache.calcite.rex.RexBuilder;
+import org.apache.calcite.rex.RexLocalRef;
+import org.apache.calcite.rex.RexNode;
+import org.apache.calcite.rex.RexProgram;
+import org.apache.calcite.rex.RexProgramBuilder;
+import org.apache.calcite.rex.RexShuttle;
+import org.apache.calcite.rex.RexUtil;
+import org.apache.calcite.tools.RelBuilder;
+import org.apache.hadoop.hive.ql.optimizer.calcite.Bug;
+import org.apache.hadoop.hive.ql.optimizer.calcite.HiveRelFactories;
+import org.apache.hadoop.hive.ql.optimizer.calcite.reloperators.HiveFilter;
+
+/**
+ * Mostly a copy of {@link org.apache.calcite.rel.rules.FilterMergeRule}.
+ * However, it flattens the predicate before creating the new filter.
+ */
+public class HiveFilterMergeRule extends RelOptRule {
+
+ public static final HiveFilterMergeRule INSTANCE =
+ new HiveFilterMergeRule();
+
+ /** Private constructor. */
+ private HiveFilterMergeRule() {
+ super(operand(HiveFilter.class,
+ operand(HiveFilter.class, any())),
+ HiveRelFactories.HIVE_BUILDER, null);
+ if (Bug.CALCITE_3982_FIXED) {
+ throw new AssertionError("Remove logic in HiveFilterMergeRule when
[CALCITE-3982] "
+ + "has been fixed and use directly Calcite's FilterMergeRule
instead.");
+ }
+ }
+
+ //~ Methods ----------------------------------------------------------------
+
+ public void onMatch(RelOptRuleCall call) {
+ final HiveFilter topFilter = call.rel(0);
+ final HiveFilter bottomFilter = call.rel(1);
+
+ RexBuilder rexBuilder = topFilter.getCluster().getRexBuilder();
+ RexProgram bottomProgram = createProgram(bottomFilter);
+ RexProgram topProgram = createProgram(topFilter);
+
+ RexProgram mergedProgram =
+ RexProgramBuilder.mergePrograms(
+ topProgram,
+ bottomProgram,
+ rexBuilder);
+
+ RexNode newCondition = expandLocalRef(rexBuilder,
+ mergedProgram.getCondition(), mergedProgram.getExprList());
+
+ final RelBuilder relBuilder = call.builder();
+ relBuilder.push(bottomFilter.getInput())
+ .filter(newCondition);
Review comment:
You are right... I copied the code as-is from Calcite but I think going
through the program is actually not necessary.
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Issue Time Tracking
-------------------
Worklog Id: (was: 432464)
Time Spent: 0.5h (was: 20m)
> FilterMergeRule can lead to AssertionError
> ------------------------------------------
>
> Key: HIVE-23389
> URL: https://issues.apache.org/jira/browse/HIVE-23389
> Project: Hive
> Issue Type: Bug
> Components: CBO
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Priority: Major
> Labels: pull-request-available
> Attachments: HIVE-23389.01.patch, HIVE-23389.01.patch,
> HIVE-23389.02.patch, HIVE-23389.patch
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> I have not been able to reproduce the issue in latest master. However, this
> could potentially happen since Filter creation has a check on whether the
> expression is flat
> ([here|https://github.com/apache/calcite/blob/master/core/src/main/java/org/apache/calcite/rel/core/Filter.java#L74])
> and Filter merge does not flatten an expression when it is created.
> {noformat}
> java.lang.AssertionError: AND(=($3, 100), OR(OR(null, IS NOT
> NULL(CAST(100):INTEGER)), =(CAST(100):INTEGER, CAST(200):INTEGER)))
> at org.apache.calcite.rel.core.Filter.<init>(Filter.java:74)
> at
> org.apache.hadoop.hive.ql.optimizer.calcite.reloperators.HiveFilter.<init>(HiveFilter.java:39)
> at
> org.apache.hadoop.hive.ql.optimizer.calcite.HiveRelFactories$HiveFilterFactoryImpl.createFilter(HiveRelFactories.java:126)
> at
> org.apache.hadoop.hive.ql.optimizer.calcite.HiveRelBuilder.filter(HiveRelBuilder.java:99)
> at org.apache.calcite.tools.RelBuilder.filter(RelBuilder.java:1055)
> at
> org.apache.calcite.rel.rules.FilterMergeRule.onMatch(FilterMergeRule.java:81)
> {noformat}
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