Julian Hyde created CALCITE-855:
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Summary: Allow UNNEST to have multiple arguments
Key: CALCITE-855
URL: https://issues.apache.org/jira/browse/CALCITE-855
Project: Calcite
Issue Type: Bug
Reporter: Julian Hyde
Assignee: Julian Hyde
The SQL standard allows UNNEST to have more than one argument. The result is a
collection of records whose i'th record draws fields from the i'th record of
each input.
We have laid groundwork for this in CALCITE-854, specifically how the type of
an Uncollect is derived. Uncollect will continue to have one input, but with
this change, the input may now have more than one column. Each column must be
an array or multiset (slightly looser than the standard, which only allows
multiple arguments if all are arrays).
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