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Posted to issues@calcite.apache.org by "Julian Hyde (JIRA)" <ji...@apache.org> on 2019/06/24 18:41:00 UTC
[jira] [Updated] (CALCITE-3144) Add rule,
CaseFilteredAggregatorRule, 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:
---------------------------------
Description:
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.
was:
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.
> Add rule, CaseFilteredAggregatorRule, 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
> Priority: Major
>
> 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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