FIX: Incorrect result when you use LIKE pattern to match the Japanese repeat character (Cho-On) in SQL Server

ഇവയിൽ പ്രയോഗിക്കുന്നു: SQL Server 2008 R2 Service Pack 2SQL Server 2008 R2 DeveloperSQL Server 2008 R2 Enterprise

Symptoms


Assume that you execute a statement that contains a LIKE operator with the collation Japanese_XJIS_100_CI_AS in Microsoft SQL Server 2008 R2, SQL Server 2012, or SQL Server 2014. There is a Japanese repeat character 'ー' (Cho-On) in the LIKE pattern. When you execute the statement, unmatched LIKE pattern can be treated as matched. For example, N'BAー1' does not match N'%AB1', when you execute the following statement:
if (N'BAー1' like N'%AB1%' Collate Japanese_XJIS_100_CI_AS)
print 'Japanese_XJIS_100_CI_AS : BAー1 like %AB1% --> match'
The result is matched.

Cause


The issue occurs because the Japanese repeat char is processed incorrectly.

Resolution


The issue was first fixed in the following cumulative update of SQL Server.

Cumulative Update 2 for SQL Server 2012 SP2

Cumulative Update 12 for SQL Server 2012 SP1

Cumulative Update 3 for SQL Server 2014

Cumulative Update 13 for SQL Server 2008 R2 SP2

Status


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.