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https://issues.apache.org/jira/browse/CALCITE-6480?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17866593#comment-17866593
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kate commented on CALCITE-6480:
-------------------------------
I forgot to mention that we would like to be able to optimise bool case when to
and and or expressions, as in the example above.
convert to
{code:java}
SELECT * FROM xxx
WHERE a > 10 and b < 5 or NOT(a>10) and c > 0 ;{code}
I think there are two possible solutions, one is to talk about this
optimisation as a fixed optimisation to be put into RexSimplify, and the other
is to do it in RelToSqlConverter as a pre-processor for some of the source
> OracleDialect does not support CASE WHEN returning boolean
> ----------------------------------------------------------
>
> Key: CALCITE-6480
> URL: https://issues.apache.org/jira/browse/CALCITE-6480
> Project: Calcite
> Issue Type: Wish
> Components: core
> Reporter: kate
> Priority: Minor
>
> Our requirement is to use Calcite to translate queries into different
> dialects. During validation in the TPC-DS scenario, we found that {{Oracle}}
> does not support SQL statements like
> {code:java}
> SELECT * FROM xxx
> WHERE CASE WHEN a > 10 THEN b < 5 ELSE c > 0 END;{code}
> Therefore, we hope to remove such predicates at the dialect like Oracle.
>
>
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