[jira] [Created] (CALCITE-3982) FilterMergeRule can lead to AssertionError

["Jesus Camacho Rodriguez (Jira)" <ji...@apache.org>]

Jesus Camacho Rodriguez created CALCITE-3982:
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             Summary: FilterMergeRule can lead to AssertionError
                 Key: CALCITE-3982
                 URL: https://issues.apache.org/jira/browse/CALCITE-3982
             Project: Calcite
          Issue Type: Bug
          Components: core
            Reporter: Jesus Camacho Rodriguez


This could potentially happen since Filter creation has a check on whether the expression is flat ([here|https://github.com/apache/calcite/blob/master/core/src/main/java/org/apache/calcite/rel/core/Filter.java#L74]) and Filter merge does not flatten an expression when it is created.

{noformat}
java.lang.AssertionError: AND(=($3, 100), OR(OR(null, IS NOT NULL(CAST(100):INTEGER)), =(CAST(100):INTEGER, CAST(200):INTEGER)))
	at org.apache.calcite.rel.core.Filter.<init>(Filter.java:74)
	at org.apache.hadoop.hive.ql.optimizer.calcite.reloperators.HiveFilter.<init>(HiveFilter.java:39)
	at org.apache.hadoop.hive.ql.optimizer.calcite.HiveRelFactories$HiveFilterFactoryImpl.createFilter(HiveRelFactories.java:126)
	at org.apache.hadoop.hive.ql.optimizer.calcite.HiveRelBuilder.filter(HiveRelBuilder.java:99)
	at org.apache.calcite.tools.RelBuilder.filter(RelBuilder.java:1055)
	at org.apache.calcite.rel.rules.FilterMergeRule.onMatch(FilterMergeRule.java:81)
{noformat}



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