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https://issues.apache.org/jira/browse/PHOENIX-7917?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Kyle Purtell resolved PHOENIX-7917.
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Resolution: Fixed
> Expand the EXPLAIN WITH options list grammar
> --------------------------------------------
>
> Key: PHOENIX-7917
> URL: https://issues.apache.org/jira/browse/PHOENIX-7917
> Project: Phoenix
> Issue Type: Sub-task
> Reporter: Andrew Kyle Purtell
> Assignee: Andrew Kyle Purtell
> Priority: Major
> Fix For: PHOENIX-7876-feature
>
>
> Replace the {{EXPLAIN [WITH REGIONS]}} grammar with a comma-separated option
> list {{EXPLAIN [(<opt> [, <opt>]*)] <stmt>}} accepting {{REGIONS}},
> {{VERBOSE}}, {{FORMAT TEXT}}, and {{FORMAT JSON}}, preserving {{EXPLAIN WITH
> REGIONS}} as a backward compatible alias.
> Update {{PhoenixSQL.g}} {{explain_node}} rule to accept either {{LPAREN id
> (COMMA id)* RPAREN}} or {{WITH REGIONS}} between {{EXPLAIN}} and the inner
> {{oneStatement}}, with {{FORMAT TEXT|JSON}} parsed as {{FORMAT}} followed by
> an identifier. {{VERBOSE}}, {{FORMAT}}, {{TEXT}}, and {{JSON}} are matched
> as {{identifier}} inside {{explain_node}} and validated against a closed set
> in the action block.
> {{ExplainStatement}} replaces {{ExplainType}} with {{ExplainOptions}}.
> {{ParseNodeFactory}} gains a {{factory.explain(stmt, ExplainOptions)}}
> overload. {{PhoenixStatement#ExecutableExplainStatement}} takes
> {{ExplainOptions}} and propagates {{regions}} through to
> {{BaseResultIterators.explainUtil}}.
> Region locator lookup still happens unconditionally.
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