Yes, it look's like the string parameter gets converted to a number. Told you it had changed. ;-)
Which means that
SQL> select count(*) from rdf_test where '1.0' = v1;
COUNT(*)
----------
1
SQL> select count(*) from rdf_test where 'a' = v1;
select count(*) from rdf_test where 'a' = v1
*
ERROR at line 1:
ORA-01722: invalid number
SQL> select count(*) from rdf_test where v1 = 'a';
select count(*) from rdf_test where v1 = 'a'
*
ERROR at line 1:
ORA-01722: invalid number
Obviously the fix is to convert the number into a string (since the exception can't be generated then). Thus,
1* select count(*) from rdf_test where 'a' = TO_CHAR(v1)
SQL> /
COUNT(*)
----------
0
Great. It's working fine now. But...
SQL> select count(*) from rdf_test where '1.0' = TO_CHAR(v1);
COUNT(*)
----------
0
which leaves it still being a headache.
--
Tommy
Too stupid to live.
Too stubborn to die.
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