MS SQL requires specifying the escape character in the query using the ESCAPE directive. The way it is currently handled leads to incorrect escaping, for example, simpleSearch doesn't work since the backend query contains something like:
"...page_title LIKE '%foo\_bar'%..." which works for most DB's, but MS SQL requires:
"...page_title LIKE '%foo\_bar'% ESCAPE '\'..."
This is breaking various functions around the code base that expect LIKE queries to work correctly.