Hafeez Rahim <hafeez(dot)rahim(at)mindcurv(dot)com> writes:
> Issue :
> One of the table query not woks when string values are filtered with =
> clause
> where as the query works with like clause using '%' flag or using
> trim(column)
> below are query examples describes the problem
You've not really provided enough detail, but I'm going to guess
that your OS update included a change in collation definitions
that left any indexes on text columns essentially corrupt.
The LIKE queries probably weren't affected because they didn't
rely on indexes.
Reindexing the indexes should have been enough to fix it.
See
https://wiki.postgresql.org/wiki/Locale_data_changes
regards, tom lane