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https://issues.apache.org/jira/browse/HIVE-9140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14257739#comment-14257739
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Laljo John Pullokkaran commented on HIVE-9140:
----------------------------------------------
SemanticAnalyzer: 2633
HepProgramBuilder hepPgmBldr = new
HepProgramBuilder().addMatchOrder(HepMatchOrder.BOTTOM_UP)
.addRuleInstance(new JoinToMultiJoinRule(HiveJoin.class));
hepPgmBldr.addRuleInstance(ReduceExpressionsRule.JOIN_INSTANCE);
hepPgmBldr.addRuleInstance(new
LoptOptimizeJoinRule(HiveJoin.HIVE_JOIN_FACTORY,
HiveProject.DEFAULT_PROJECT_FACTORY,
HiveFilter.DEFAULT_FILTER_FACTORY));
Shouldn't ReduceExpressionsRule.JOIN_INSTANCE be after LoptOptimizeJoinRule?
> Add ReduceExpressionRules from Calcite into Hive
> ------------------------------------------------
>
> Key: HIVE-9140
> URL: https://issues.apache.org/jira/browse/HIVE-9140
> Project: Hive
> Issue Type: Improvement
> Components: CBO, Logical Optimizer
> Affects Versions: 0.14.0
> Reporter: Ashutosh Chauhan
> Assignee: Ashutosh Chauhan
> Attachments: HIVE-9140.1.patch, HIVE-9140.patch
>
>
> These rules provide a form of constant folding.
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