[Mono-dev] [PATCH] Mono.Data.SqlExpressions improvements

[Joel Reed]

I've done a bit more hacking on System.Data - Mono.Data.SqlExpressions 
in order to fix a previously reported issue with IIF:

http://www.nabble.com/IIF-Bug-in-Mono.Data.SqlExpressions-Parser.jay-t4513001.html

The attached patch adds 3 new testcases and fixes the following bugs:

# IIF: Accept SingleColumnValues and Literals for condition
# SUBSTRING: Accept arithmetic expressions for start, and length parameters
# Removed last shift/reduce conflict
# Fix obvious bug in "ArithExpr NOT LIKE StringLiteral" rule

I'd like to apply this patch. Please let me know if you see any
issues with it. 

jr
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