[jira] [Created] (CALCITE-3784) RexCall toString digest gives OOM while huge expression is evaluated

["Ravi Kapoor (Jira)" <ji...@apache.org>]

Ravi Kapoor created CALCITE-3784:
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             Summary: RexCall toString digest gives OOM while huge expression is evaluated
                 Key: CALCITE-3784
                 URL: https://issues.apache.org/jira/browse/CALCITE-3784
             Project: Calcite
          Issue Type: Bug
          Components: core
            Reporter: Ravi Kapoor


I have some complex query which has tens of thousands of rex expressions and this expression is used in filter expression in the query.

On creating a filter below code gets called:

public RelBuilder filter(Iterable<CorrelationId> variablesSet,
  Iterable<? extends RexNode> predicates) {

  final RexNode simplifiedPredicates =
  simplifier.simplifyFilterPredicates(predicates);
  if (simplifiedPredicates == null) {
    return empty();
 }

RexSimplify further adds the rexnode in the Set<RexNode> calling hashcode() internally which calls toString()

Is there any way to avoid this computeDigest Call which creates complex string object and blows up the  RAM about 14GB?

 

 

 



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