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https://issues.apache.org/jira/browse/CALCITE-442?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde resolved CALCITE-442.
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Resolution: Fixed
Fix Version/s: 0.9.2-incubating
Fixed in http://git-wip-us.apache.org/repos/asf/incubator-calcite/commit/3afe4b1
> Add RelOptRuleOperand constructor that takes a predicate
> --------------------------------------------------------
>
> Key: CALCITE-442
> URL: https://issues.apache.org/jira/browse/CALCITE-442
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Assignee: Julian Hyde
> Fix For: 0.9.2-incubating
>
>
> Currently if you want a rule operand to only match certain relational
> expressions you must sub-class RelOptRuleOperand and change the {{boolean
> matches(RelNode)}} method.
> We should add a constructor RelOptRuleOperand that takes a predicate (a
> function that returns a boolean). Then sub-classing will not be necessary.
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