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https://issues.apache.org/jira/browse/CALCITE-1450?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde updated CALCITE-1450:
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Summary: Support a "replicate_rows" table function (was: support a UDTF
replicate_rows)
> Support a "replicate_rows" table function
> -----------------------------------------
>
> Key: CALCITE-1450
> URL: https://issues.apache.org/jira/browse/CALCITE-1450
> Project: Calcite
> Issue Type: Sub-task
> Reporter: Pengcheng Xiong
> Assignee: Julian Hyde
>
> Add a user-defined table function that has a count column N, and a number of
> other columns, and for each row, produces N copies of that row.
> The purpose of this table function is to implement {{INTERSECT ALL}} and
> {{EXCEPT ALL}}. Observe that if have a table 'five' with 5 rows with the
> value 'x', and a table 'three' with 3 rows with the value 'x', then {{five
> INTERSECT ALL three}} will need to emit {{min(5, 3))}} rows, and {{five
> EXCEPT ALL three}} will emit {{5 - 3}} rows.
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