[COMMITTERS] mysqlcompat - mysqlcompat: Add substring_index()

[User Chriskl]

Log Message:
-----------
Add substring_index()

Modified Files:
--------------
    mysqlcompat:
        string.sql (r1.6 -> r1.7)
        
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/mysqlcompat/mysqlcompat/string.sql.diff?r1=1.6&r2=1.7)

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