Sean Hsuan-Yi Chu created CALCITE-583:
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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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