[
https://issues.apache.org/jira/browse/HIVE-25941?focusedWorklogId=732262&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-732262
]
ASF GitHub Bot logged work on HIVE-25941:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 24/Feb/22 12:40
Start Date: 24/Feb/22 12:40
Worklog Time Spent: 10m
Work Description: kasakrisz commented on a change in pull request #3014:
URL: https://github.com/apache/hive/pull/3014#discussion_r813839462
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/HiveMaterializedViewTextSubQueryRewriteShuttle.java
##########
@@ -0,0 +1,189 @@
+/*
+ * 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;
+
+import org.apache.calcite.plan.RelOptCluster;
+import org.apache.calcite.rel.RelNode;
+import org.apache.calcite.rex.RexNode;
+import org.apache.calcite.tools.RelBuilder;
+import org.apache.hadoop.hive.common.TableName;
+import org.apache.hadoop.hive.ql.lockmgr.HiveTxnManager;
+import org.apache.hadoop.hive.ql.metadata.Hive;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.hive.ql.metadata.HiveRelOptMaterialization;
+import org.apache.hadoop.hive.ql.metadata.Table;
+import org.apache.hadoop.hive.ql.optimizer.calcite.reloperators.HiveFilter;
+import org.apache.hadoop.hive.ql.optimizer.calcite.reloperators.HiveProject;
+import
org.apache.hadoop.hive.ql.optimizer.calcite.rules.views.HiveMaterializedViewUtils;
+import org.apache.hadoop.hive.ql.parse.ASTNode;
+import org.apache.hadoop.hive.ql.parse.CalcitePlanner;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.EnumSet;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.Stack;
+import java.util.function.Predicate;
+
+import static java.util.Collections.singletonList;
+import static java.util.Collections.unmodifiableMap;
+import static java.util.Collections.unmodifiableSet;
+import static
org.apache.hadoop.hive.ql.metadata.HiveRelOptMaterialization.RewriteAlgorithm.NON_CALCITE;
+import static
org.apache.hadoop.hive.ql.optimizer.calcite.rules.views.HiveMaterializedViewUtils.extractTable;
+
+/**
+ * Traverse the plan and tries to rewrite subtrees of the plan to materialized
view scans.
+ *
+ * The rewrite depends on whether the subtree's corresponding AST match with
any materialized view
+ * definitions AST.
+ */
+public class HiveMaterializedViewTextSubQueryRewriteShuttle extends
HiveRelShuttleImpl {
+
+ private static final Logger LOG =
LoggerFactory.getLogger(HiveMaterializedViewTextSubQueryRewriteShuttle.class);
+
+ private final Map<RelNode, ASTNode> subQueryMap;
+ private final ASTNode originalAST;
+ private final ASTNode expandedAST;
+ private final RelBuilder relBuilder;
+ private final Hive db;
+ private final Set<TableName> tablesUsedByOriginalPlan;
+ private final HiveTxnManager txnManager;
+
+ public HiveMaterializedViewTextSubQueryRewriteShuttle(
Review comment:
Changed to 'syntax tree'
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Issue Time Tracking
-------------------
Worklog Id: (was: 732262)
Time Spent: 40m (was: 0.5h)
> Long compilation time of complex query due to analysis for materialized view
> rewrite
> ------------------------------------------------------------------------------------
>
> Key: HIVE-25941
> URL: https://issues.apache.org/jira/browse/HIVE-25941
> Project: Hive
> Issue Type: Bug
> Components: Materialized views
> Reporter: Krisztian Kasa
> Assignee: Krisztian Kasa
> Priority: Major
> Labels: pull-request-available
> Attachments: sample.png
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> When compiling query the optimizer tries to rewrite the query plan or
> subtrees of the plan to use materialized view scans.
> If
> {code}
> set hive.materializedview.rewriting.sql.subquery=false;
> {code}
> the compilation succeed in less then 10 sec otherwise it takes several
> minutes (~ 5min) depending on the hardware.
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