Hi Thomas,
I did further testing and have some new findings. Consider this test case:
SELECT
-(CAST('-0.0' AS DOUBLE)) = ZERO(),
(CAST('-0.0' AS DOUBLE)) = -ZERO(),
-(CAST('0.0' AS DOUBLE)) = ZERO(),
(CAST('0.0' AS DOUBLE)) = -ZERO(),
(CAST('-0.0' AS DOUBLE)) = (CAST('0.0' AS DOUBLE))
Apart from the ABS(x) function containing a bug, there is another bug: 0.0
should be equal to -0.0. This is how Java behaves, and so comparisons to
ZERO() should also be true in all those cases above.
These problems affect float and double Java types, which means DOUBLE,
FLOAT, FLOAT8, FLOAT4, REAL for H2.
Please let me know if I am missing something.
-Christopher
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