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https://issues.apache.org/jira/browse/CALCITE-4352?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated CALCITE-4352:
------------------------------------
Labels: pull-request-available (was: )
> RelBuilder/RexSimplify/Sarg incorrectly transforms complex expressions with
> IS NULL/IS NOT NULL
> -----------------------------------------------------------------------------------------------
>
> Key: CALCITE-4352
> URL: https://issues.apache.org/jira/browse/CALCITE-4352
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.27.0
> Environment: All environments
> Reporter: Igor Lozynskyi
> Priority: Major
> Labels: pull-request-available
> Attachments: rex-simplify-issue-tests-3.patch
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Now, the following query with IS NOT NULL:
> {code:java}
> SELECT *
> FROM emp
> WHERE deptno > 20 AND deptno < 30 AND mgr IS NOT NULL{code}
> Is simplified to:
> {code:java}
> SELECT *
> FROM emp
> WHERE deptno > 20 AND deptno < 30{code}
> It seems that the simplification of complex `AND` filters incorrectly
> simplify `IS NOT NULL` to `TRUE`.
> During simplification, `IS NOT NULL` is transformed to `SEARCH($3,
> Sarg[(-∞..+∞), null])` instead of `SEARCH($3, Sarg[(-∞..+∞)])`.
> Also, the following query with IS NULL:
> {code:java}
> SELECT *
> FROM emp
> WHERE deptno > 20 AND deptno < 30 AND mgr IS NULL
> {code}
> Is simplified to the following query:
> {code:java}
> SELECT *
> FROM emp
> WHERE deptno > 20 AND deptno < 30
> {code}
> However, now it is correct when transformed into a Sarg, but incorrect after
> `RexUtil.expandSearch()` expansion.
>
> A simpler query does not show this issue (stays the same):
> {code:java}
> SELECT *
> FROM emp
> WHERE mgr IS NOT NULL{code}
> The patch with the corresponding test cases is in attachments.
>
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