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https://issues.apache.org/jira/browse/CALCITE-5050?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Julian Hyde resolved CALCITE-5050.
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Fix Version/s: 1.31.0
Resolution: Fixed
Fixed in
[1ce516dc|https://github.com/apache/calcite/commit/1ce516dcb660caa40ac806617f37cae9532bd0aa].
> Metadata (RelMdRowCount) should reflect the fact that an Aggregate with no
> GROUP BY always returns 1 row
> --------------------------------------------------------------------------------------------------------
>
> Key: CALCITE-5050
> URL: https://issues.apache.org/jira/browse/CALCITE-5050
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.29.0, 1.30.0
> Reporter: Jing Zhang
> Priority: Minor
> Labels: pull-request-available
> Fix For: 1.31.0
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> Currently, RowCount of aggregate without group keys are unexpected.
> The problem could be appear in the following UT:
> {code:java}
> @Test void testRowCountAggregateEmptyKey1() {
> fixture()
> .withRelFn(b ->
> b.scan("EMP")
> .aggregate(
> b.groupKey(),
> b.count(false, "C"))
> .build())
> .assertThatRowCount(is(1D), is(1D), is(1D));
> }
> {code}
> Now, the above UT would be failed because row count return 1.4D instead of 1D.
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