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https://issues.apache.org/jira/browse/CALCITE-5466?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benchao Li resolved CALCITE-5466.
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Fix Version/s: 1.33.0
Resolution: Fixed
Fixed via
https://github.com/apache/calcite/commit/fb340ece8c5e60ecfd6371950f8dcb665c85a712
[~aitozi] Thanks for reporting and fixing this issue.
> Constant condition can't be reduced after correlate
> ---------------------------------------------------
>
> Key: CALCITE-5466
> URL: https://issues.apache.org/jira/browse/CALCITE-5466
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Aitozi
> Assignee: Aitozi
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.33.0
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> Currently the RelMdPredicates do not handle the predicates for the correlate
> node which will generate the below output
> {noformat}
> Sink(table=[default_catalog.default_database.sink_t], fields=[name, num])
> +- Calc(select=[name, CAST(CASE(=(__source_type__, _UTF-16LE'bounded'), 1, 2)
> AS BIGINT) AS num])
> +- Correlate(invocation=[test_udtf($cor1.name)],
> correlate=[table(test_udtf($cor1.name))],
> select=[name,__source_type__,EXPR$0], rowType=[RecordType(VARCHAR(2147483647)
> name, CHAR(7) __source_type__, VARCHAR(2147483647) EXPR$0)], joinType=[INNER])
> +- Calc(select=[name, _UTF-16LE'bounded' AS __source_type__])
> +- TableSourceScan(table=[[default_catalog, default_database,
> source_t]], fields=[name])
> {noformat}
> However, the '__source_type__' is obviously a constant can be reduced during
> optimizing. It can be solved by extend the RelMdPredicates to get predicates
> from the left input of the correlate node
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