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Posted to issues@calcite.apache.org by "Sean Hsuan-Yi Chu (JIRA)" <ji...@apache.org> on 2015/02/01 23:18:34 UTC

[jira] [Created] (CALCITE-583) Operator `||` mishandled ANY type

Sean Hsuan-Yi Chu created CALCITE-583:
-----------------------------------------

             Summary: Operator `||` mishandled ANY type 
                 Key: CALCITE-583
                 URL: https://issues.apache.org/jira/browse/CALCITE-583
             Project: Calcite
          Issue Type: Bug
            Reporter: Sean Hsuan-Yi Chu
            Assignee: Julian Hyde


For instance, 
select  ANY type || ANY type ... leads assertion error from:
assert (precision >= 0)        || (precision == RelDataType.PRECISION_NOT_SPECIFIED);
(SqlTypeFactoryImpl.java( line: 62))

Essentially, it is because, SqlReturnTypeInference of `||` is DYADIC_STRING_SUM_PRECISION. When doing inference for the return type, there is one data field in DYADIC_STRING_SUM_PRECISION called "precision", which is calculated as arg0.precison + arg1.precision.

However, for ANY type, the precision is defined as -1. So the above calculation will give "-2" for ANY type operands, in turn, breaking up the assertion.



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