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https://issues.apache.org/jira/browse/IGNITE-29203?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18132506#comment-18132506
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Vladislav Pyatkov commented on IGNITE-29203:
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Merged 0ab9cc96452f4c45158c2447391968e18aee0a9f
> SQL Calcite: Fix equality, hashing and ordering of keys containing ROW and
> ARRAY values
> ---------------------------------------------------------------------------------------
>
> Key: IGNITE-29203
> URL: https://issues.apache.org/jira/browse/IGNITE-29203
> Project: Ignite
> Issue Type: Bug
> Reporter: Vladislav Pyatkov
> Assignee: Vladislav Pyatkov
> Priority: Major
> Labels: calcite, ignite-2, sql
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> h3. Motivation
> Keys containing ROW values may be compared and hashed by reference, while
> sorting ROW and ARRAY values fails with ClassCastException. Use content-based
> equality and hashing for execution keys and SQL distribution, and recursive
> comparison for sorting.
> h3. Definition of Done
> * DISTINCT produces correct results with colocated and map/reduce hash and
> sort aggregation.
> * Tests cover equal keys on different nodes, nested values, and NULL handling.
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