[DERBY-3080] With TERRITORY_BASED collation, when multiple characters map to a single collation element '_' matches a single collation element rather than a single character

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 10.3.1.4, 10.4.1.3
• Fix Version/s: 10.3.2.1, 10.4.1.3
• Component/s: SQL
• Assignee: Mamta A. Satoor
• Reporter: Katherine Marsden
• Created: 18/Sep/07 16:10
• Updated: 22/Oct/07 05:50
• Resolved: 22/Oct/07 05:50

Description

'_' matches a single collation element rather than a single character if multiple characters have a single collation element. Below is an example with norwegian aa This occurs also with the patch for DERBY-2967 which addresses the case of matching of a single character having more than one collation element.

ij> connect 'jdbc:derby:wombat;create=true;territory=no_NO;collation=TERRITORY_BASED';
ij> drop table t;
0 rows inserted/updated/deleted
ij> create table t (vc varchar(30));
0 rows inserted/updated/deleted
ij> insert into t values('middleaavalue');
1 row inserted/updated/deleted
– The query below should match
ij> select * from t where vc like 'middle__value';
VC
------------------------------

0 rows selected
– The query below should not match.
ij> select * from t where vc like 'middle_value';
VC
------------------------------
middleaavalue