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https://issues.apache.org/jira/browse/FLINK-21261?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated FLINK-21261:
-----------------------------------
Labels: pull-request-available (was: )
> Improve digest of physical Expand node
> --------------------------------------
>
> Key: FLINK-21261
> URL: https://issues.apache.org/jira/browse/FLINK-21261
> Project: Flink
> Issue Type: Improvement
> Components: Table SQL / Planner
> Reporter: Jark Wu
> Assignee: Jark Wu
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.13.0
>
>
> Currently, the digest of {{StreamPhysicalExpand}} only geneartes field names,
> this loses many useful information, e.g. null fields, expand id, expand
> times.
> {code}
> Expand(projects=[a, b, c, $f3, $f4, $e])
> {code}
> The digest of {{BatchPhysicalExpand}} generates additional projects list, but
> the first {{projects}} is reduandent information, we can remove it.
> {code}
> Expand(projects=[a, c, $f2, d, $e, $f2_0], projects=[{a, c, $f2, d, 0 AS $e,
> $f2 AS $f2_0}, {a, c, null AS $f2, null AS d, 3 AS $e, $f2 AS $f2_0}])
> {code}
> The proposed digest of expand node would be:
> {code}
> Expand(projects=[{a, c, $f2, d, 0 AS $e, $f2 AS $f2_0}, {a, c, null AS $f2,
> null AS d, 3 AS $e, $f2 AS $f2_0}])
> {code}
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