MS SQL Server reserved keyword "MERGE" is not quoted
Description
Hitting this with JIRA 6.3.3 against MS SQL Server.
There's a new column named "MERGE", introduced in the changes for DCON-406.
It turns out that "MERGE" is a reserved keyword in MS SQL Server: http://msdn.microsoft.com/en-us/library/ms189822.aspx
We need to include all reserved keywords in SQL Server to our list.
Environment
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Testing Notes
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