Hi List,
Yesterday I was confronted with an interesting question they faced.
They have some entries in a varchar2 column such as
_A, _B, _Ä, _, A
The LIKE pattern is '\_%' ESCAPE '\'
when NLS_COMP is LINGUISTIC and NLS_SORT is set to GERMAN_AI
this LIKE doesn't return any rows.
My suggested workaround is to use
('\_%' COLLATE GERMAN_AI ) escape '\'
But I can't explain, why this is required to make the % work as I expect.
Why % is sensitive of the collation?
Can anyone give me a hint, please?
A simple testcase can be found at
https://livesql.oracle.com/apex/livesql/s/lfcf58k7cj18t22jeth3rz6cu
thank you,
Martin
--
Martin Berger Oracle ♠
martin.a.berger@xxxxxxxxx @martinberx <https://twitter.com/martinberx>
^∆x http://berxblog.blogspot.com
