After backup/restore the indexes by expression on computed field are not
working properly.
------------------------------------------------------------------------------------------
Key: CORE-5800
URL: http://tracker.firebirdsql.org/browse/CORE-5800
Project: Firebird Core
Issue Type: Bug
Affects Versions: 2.5.8
Reporter: Polesov
Firebird version WI-V6.3.7.27050
Create the table:
create table T (
A char(1),
B char(1),
C computed by (A || ' ' || B)
);
Create an index by expression on the calculated field:
create index IDX_T_C on T computed by (lower( C ));
Insert data into table:
insert into T ( A, B ) values ( 'A', 'B' );
insert into T ( A, B ) values ( 'C', 'D' );
insert into T ( A, B ) values ( 'E', 'F' );
commit;
Execute the query:
select * from T where lower( C ) = 'a b';
Result:
A B C
====== ====== ======
A B A B
plan (T index (IDX_T_C))
After backup/restore, the query does not return data:
select * from T where lower( C ) = 'a b';
No have results:
plan (T index (IDX_T_C))
Change the query without using the index:
select * from T where lower( C ) || '' = 'a b';
Result:
A B C
====== ====== ======
A B A B
plan (T natural)
After rebuilding the index, the indexes working properly:
alter index IDX_T_C active;
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