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https://issues.apache.org/jira/browse/PHOENIX-7924?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Kyle Purtell resolved PHOENIX-7924.
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Fix Version/s: PHOENIX-7876-feature
Resolution: Fixed
> EXPLAIN improvement bug fixes
> -----------------------------
>
> Key: PHOENIX-7924
> URL: https://issues.apache.org/jira/browse/PHOENIX-7924
> Project: Phoenix
> Issue Type: Sub-task
> Affects Versions: PHOENIX-7876-feature
> Reporter: Andrew Kyle Purtell
> Assignee: Andrew Kyle Purtell
> Priority: Major
> Fix For: PHOENIX-7876-feature
>
>
> Three fixes for bugs discovered while generating EXPLAIN/EXPLAIN
> VERBOSE/EXPLAIN JSON examples.
> {{LiteralExpression.toString()}} rendered typed-null literals as empty.
> Output now shows {{BSON_VALUE(..., null)}} instead of {{BSON_VALUE(..., )}}.
> Leading whitespace was baked into functional index column names. Fixed by
> trimming at creation. Output now shows {{PROJECT "BSON_VALUE(...)"` instead
> of `PROJECT " BSON_VALUE(...)"}}.
> {{REWRITE INDEX EXPRESSION <expr> AS <index col>}} breadcrumb was missing
> because it was always silently dropped. Drop the eager emission, store the
> col to expr substitution pairs on {{StatementContext}}, and emit one
> breadcrumb per actually fired substitution from
> {{QueryOptimizer.recordDecision}}.
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