Hello,
We have just discovered a problem with the soundex function in
PostgreSQL 8.3.7. The problem is easy to reproduce. The following query
returns the ASCII code of the soundex representation of the Greek letter Pi:
select ascii (soundex('Π'));
In PostgreSQL 8.2.6 the result would be 0 (character null). In
PostgreSQL 8.3.7 the return value is 944, which is the UTF-16 code of
this letter. Because PostgreSQL does not support UTF-16, this behaviour
causes problems when the return values from the soundex function are
stored in a database column. For instance, creating an index on such a
column or doing VACUUM FULL on the table results in errors like:
ERROR: could not convert string to UTF-16
Regards,
Frans
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