Like in 9.2.0.6 versus 9.2.0.4

Question

after migration from 9.2.0.4 to 92.0.6 we have the following problem:
select * from art where art_nummer like '753040204'
ok in 9.2.0.4
no results in 9.2.0.6
select * from art where art_nummer = '753040204'
ok iin auf 9.2.0.4
ok in 9.2.0.6
the column is typ char
is there an explanation ?
regards
Dietmar

Answer 1

it is a bug fix, because like is not supposed to work is art_nummer is a char character
SYS@LSC67 AS SYSDBA/9.2.0.6
SQL> create table art(art_nummer char(10));
Table created.
SYS@LSC67 AS SYSDBA/9.2.0.6
SQL> insert into art values ('753040204');
1 row created.
SYS@LSC67 AS SYSDBA/9.2.0.6
SQL> select * from art where art_nummer like '753040204' ;
no rows selected
SQL> r
1* create table art(art_nummer char(10))
Table created.
SYS@ESTIM61 AS SYSDBA/9.2.0.4
SQL> insert into art values ('753040204');
1 row created.
SYS@ESTIM61 AS SYSDBA/9.2.0.4
SQL> select * from art where art_nummer like '753040204' ;
ART_NUMMER
753040204