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https://issues.apache.org/jira/browse/CALCITE-2111?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde updated CALCITE-2111:
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Summary: Make HepPlanner more efficient by applying rules depth-first
(was: HepPlanner apply more and more rules)
> Make HepPlanner more efficient by applying rules depth-first
> ------------------------------------------------------------
>
> Key: CALCITE-2111
> URL: https://issues.apache.org/jira/browse/CALCITE-2111
> Project: Calcite
> Issue Type: Bug
> Affects Versions: 1.15.0
> Reporter: LeoWangLZ
> Assignee: Julian Hyde
> Fix For: 1.16.0
>
>
> HepPlanner#applyRules will fully restart after transformation.
> if the rule for the inner relNode happens transformation, then the previous
> all relNode will be apply for all rules again. and the accumulated rule apply
> will be exploded as rule apply.
> like query that it contains hundreds of union all
> {code:java}
> select * from (
> select ENAME, 50011895 as cat_id, '1' as cat_name, 1 as
> require_free_postage, 0 as require_15return, 0 as require_48hour,1 as
> require_insurance from emp where EMPNO = 20171216 and MGR = 0 and ENAME = 'Y'
> and SAL = 50011895 union all
> select ENAME, 50013023 as cat_id, '2' as cat_name, 0 as
> require_free_postage, 0 as require_15return, 0 as require_48hour,0 as
> require_insurance from emp where EMPNO = 20171216 and MGR = 0 and ENAME = 'Y'
> and SAL = 50013023 union all
> select ENAME, 50013032 as cat_id, '3' as cat_name, 0 as
> require_free_postage, 0 as require_15return, 0 as require_48hour,0 as
> require_insurance from emp where EMPNO = 20171216 and MGR = 0 and ENAME = 'Y'
> and SAL = 50013032 union all
> select ENAME, 50013024 as cat_id, '4' as cat_name, 0 as
> require_free_postage, 0 as require_15return, 0 as require_48hour,0 as
> require_insurance from emp where EMPNO = 20171216 and MGR = 0 and ENAME = 'Y'
> and SAL = 50013024 union all
> select ENAME, 50004204 as cat_id, '5' as cat_name, 0 as
> require_free_postage, 0 as require_15return, 0 as require_48hour,0 as
> require_insurance from emp where EMPNO = 20171216 and MGR = 0 and ENAME = 'Y'
> and SAL = 50004204 union all
> select ENAME, 50013043 as cat_id, '6' as cat_name, 0 as
> require_free_postage, 0 as require_15return, 0 as require_48hour,0 as
> require_insurance from emp where EMPNO = 20171216 and MGR = 0 and ENAME = 'Y'
> and SAL = 50013043 union all
> select ENAME, 290903 as cat_id, '7' as cat_name, 1 as
> require_free_postage, 0 as require_15return, 0 as require_48hour,1 as
> require_insurance from emp where EMPNO = 20171216 and MGR = 0 and ENAME = 'Y'
> and SAL = 290903 union all
> select ENAME, 50008261 as cat_id, '8' as cat_name, 1 as
> require_free_postage, 0 as require_15return, 0 as require_48hour,1 as
> require_insurance from emp where EMPNO = 20171216 and MGR = 0 and ENAME = 'Y'
> and SAL = 50008261 union all
> select ENAME, 124478013 as cat_id, '9' as cat_name, 0 as
> require_free_postage, 0 as require_15return, 1 as require_48hour,0 as
> require_insurance from emp where EMPNO = 20171216 and MGR = 0 and ENAME = 'Y'
> and SAL = 124478013 union all
> ...
> )a;
> {code}
> For rules ReduceExpressionsRule.FILTER_INSTANCE and
> ReduceExpressionsRule.PROJECT_INSTANCE, it apply 1W+ rules.
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