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From jrgchip <c...@datamology.com>
Subject Record not found in some SQL - Bug?
Date Wed, 28 Jan 2009 05:10:01 GMT

I have a "Product" table with a "Num" column that contains a record that is
only accessible by some SQL and not others.  I have tested this by JDBC
access from my Java app as well was from IJ directly.

ij> select "Num", length("Num") as "Len" from app."Product" where "Num" like
'HG1549%';
Num            |Len
----------------------------
HG15490        |7
HG15493        |7
HG15497        |7   <== Found as expected
HG15499        |7
4 rows selected

ij> select "Num" from app."Product" where "Num" = 'HG15490';
Num
----------------
HG15490  <== Found as expected
1 row selected

ij> select "Num" from app."Product" where "Num" = 'HG15493';
Num
----------------
HG15493  <== Found as expected
1 row selected

ij> select "Num" from app."Product" where "Num" = 'HG15499';
Num
----------------
HG15499  <== Found as expected
1 row selected

ij> select "Num" from app."Product" where "Num" = 'HG15497';
Num
----------------
0 rows selected  <== Not found!!!

What could possibly hide the 'HG15497' record from the last SELECT?

And it's not just a matter of equality versus inequality...as the following
SQL does return the record:
    SELECT I."STYLE" FROM TEMP."ZJVINV2" AS I INNER JOIN APP."Product" AS P
ON I."STYLE" = P."Num" WHERE I."STYLE" = 'HG15497';

I am using Java DB v10.3.2.1.

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