Julian Hyde created CALCITE-1166:
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Summary: Disallow sub-classes of RelOptRuleOperand
Key: CALCITE-1166
URL: https://issues.apache.org/jira/browse/CALCITE-1166
Project: Calcite
Issue Type: Bug
Reporter: Julian Hyde
Assignee: Julian Hyde
Disallow sub-classes of {{RelOptRuleOperand}}. The only reason that people have
sub-classed {{RelOptRuleOperand}} is to override the {{boolean
matches(RelNode)}} method, and you can now achieve that by supplying a
{{Predicate}} to the constructor.
Next release, we will deprecate {{RelOptRuleOperand}}'s protected constructor
and create a new private or package-protected one. Later we will remove that
constructor.
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