Details
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Bug
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Status: Closed
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Major
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Resolution: Fixed
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None
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None
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Description
We need to improve ReduceExpressionRule to deal with multiple "equals to literal" in predicate. In ReduceExpressionRule.java, L396-397:
final ImmutableMap<RexNode, RexLiteral> constants =
predicateConstants(predicates);
The query is
select * from src where (key='12' and key is null);
Here 'key' is a string type and it is one of the columns of 'src' table.
Then we will have predicates
[=($0, '12'), isnull($0)]
which is the input of the
predicateConstants, and the function will return "{$0='12'}"