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https://issues.apache.org/jira/browse/IGNITE-11019?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vladimir Ozerov updated IGNITE-11019:
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Issue Type: Improvement (was: Bug)
> SQL: explain plan of a simple query contains merge table
> --------------------------------------------------------
>
> Key: IGNITE-11019
> URL: https://issues.apache.org/jira/browse/IGNITE-11019
> Project: Ignite
> Issue Type: Improvement
> Components: sql
> Reporter: Alexander Lapin
> Priority: Major
> Fix For: 2.8
>
>
> In case of simple* query like following "select * from Organization org where
> org._KEY = 1 or org._KEY = 2" explain plan will contain merge table despite
> the fact that it's skipped within regular query flow.
> {code:java|title=GridReduceQueryExecutor#query}
> final boolean skipMergeTbl = !qry.explain() && qry.skipMergeTable()
> {code}
> Explain plan output:
> ____ : [SELECT
> ORG__Z0.NAME AS __C0_0,
> ORG__Z0.DEBTCAPITAL AS __C0_1,
> ORG__Z0.ID AS __C0_2
> FROM "orgBetweenTest".ORGANIZATION ORG__Z0
> /* "orgBetweenTest"."_key_PK": _KEY IN(1, 2) */
> WHERE ORG__Z0._KEY IN(1, 2)]
> ____ : [SELECT
> __C0_0 AS NAME,
> __C0_1 AS DEBTCAPITAL,
> __C0_2 AS ID
> FROM PUBLIC.__T0
> /* "orgBetweenTest"."merge_scan" */]
> *simple query by means of GridSqlQuery#simpleQuery
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