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Posted to issues@calcite.apache.org by "Julian Hyde (JIRA)" <ji...@apache.org> on 2019/07/15 17:58:00 UTC

[jira] [Updated] (CALCITE-3144) Add rule, AggregateCaseToFilterRule, that converts "SUM(CASE WHEN b THEN x END)" to "SUM(x) FILTER (WHERE b)"

     [ https://issues.apache.org/jira/browse/CALCITE-3144?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Julian Hyde updated CALCITE-3144:
---------------------------------
    Summary: Add rule, AggregateCaseToFilterRule, that converts "SUM(CASE WHEN b THEN x END)" to "SUM(x) FILTER (WHERE b)"  (was: Add rule, CaseFilteredAggregatorRule, that converts "SUM(CASE WHEN b THEN x END)" to "SUM(x) FILTER (WHERE b)")

> Add rule, AggregateCaseToFilterRule, that converts "SUM(CASE WHEN b THEN x END)" to "SUM(x) FILTER (WHERE b)"
> -------------------------------------------------------------------------------------------------------------
>
>                 Key: CALCITE-3144
>                 URL: https://issues.apache.org/jira/browse/CALCITE-3144
>             Project: Calcite
>          Issue Type: Bug
>            Reporter: Julian Hyde
>            Assignee: Julian Hyde
>            Priority: Major
>             Fix For: 1.21.0
>
>
> Add a rule that converts "SUM(CASE WHEN b THEN x END)" to "SUM\(x) FILTER (WHERE b)".
> Druid added {{CaseFilteredAggregatorRule}} in https://github.com/apache/incubator-druid/pull/4360.
> Maybe {{AggregateCaseToFilterRule}} is a slightly better name. Or maybe this transform could be done in {{RelBuilder.aggregate}}, and we wouldn't need a rule.



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