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https://issues.apache.org/jira/browse/CALCITE-4375?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17228009#comment-17228009
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Jiatao Tao edited comment on CALCITE-4375 at 11/8/20, 2:40 PM:
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Hi, [~julianhyde] Here I pull a request that does the simplification of And/Or
condition, can you help take a look?
[https://github.com/apache/calcite/pull/2253/files]
was (Author: aron.tao):
Hi [~julianhyde] Here I pull a request that does the simplify of And/Or
condition.
https://github.com/apache/calcite/pull/2253/files
> Merge join condition that has "OR" as much as possible
> ------------------------------------------------------
>
> Key: CALCITE-4375
> URL: https://issues.apache.org/jira/browse/CALCITE-4375
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Jiatao Tao
> Assignee: Jiatao Tao
> Priority: Major
>
> SQL:
> SELECT * FROM emps,depts
> WHERE
> (emps.name = depts.name AND empno=1)
> OR
> (emps.name = depts.name AND empno=2)
>
> And the join after optimizer is:
> EnumerableNestedLoopJoin(condition=[OR(AND(=($1, $11), =($0, 1)), AND(=($1,
> $11), =($0, 2)))], joinType=[inner])
>
> In fact ($1, $11) can be extracted, and the join can be:
> HashJoin(condition=[AND(=($1, $11), OR(=($0, 1), =($0, 2)))],
> joinType=[inner])
>
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