fix parsing of quoted keywords

Language/SQL/SimpleSQL/Parse.lhs

@@ -2118,6 +2118,7 @@ It is only allowed when all the strings are quoted with ' atm.
 > identifierTok :: [String] -> Parser (Maybe (String,String), String)
 > identifierTok blackList = mytoken (\tok ->
 >     case tok of
+>       L.Identifier q@(Just {}) p -> Just (q,p)
 >       L.Identifier q p | map toLower p `notElem` blackList -> Just (q,p)
 >       _ -> Nothing)
 

TODO

@@ -4,6 +4,38 @@ review alters, and think about adding rename versions
   which are really common and useful, but not in ansi
   https://github.com/JakeWheat/simple-sql-parser/issues/20
 
+
+do more examples
+what are the use cases?
+  sql generator - queries
+  sql generator - ddl
+  parsing some sql - for what purpose
+    generating documentation of ddl
+    write some sort of trivial sql engine or wrapper around something?
+    write something that takes sql, modifies it, and outputs the result
+    lint checker?
+
+do an example of adding some new syntax
+-> seems quite a few people are using this
+  and there are some feature requests
+  try to give people a path to implement features themselves
+
+goals:
+
+1. if someone might want to use this, give them some toy examples to
+help bootstrap them
+
+2. see if can encourage people who want some missing sql to add it
+themselves
+
+
+
+review main missing sql bits - focus on more mainstream things
+  could also review main dialects
+
+review the dialect support implementation
+
+
 syntax from hssqlppp:
   query hints, join hints
 

tools/Language/SQL/SimpleSQL/ScalarExprs.lhs

@@ -50,6 +50,7 @@ Tests for parsing scalar expressions
 >     [("iden1", Iden [Name Nothing "iden1"])
 >     --,("t.a", Iden2 "t" "a")
 >     ,("\"quoted identifier\"", Iden [Name (Just ("\"","\"")) "quoted identifier"])
+>     ,("\"period\"", Iden [Name (Just ("\"","\"")) "period"])
 >     ]
 
 > star :: TestItem
@@ -413,3 +414,4 @@ target_string
 >     ]
 >   where
 >     t fn = TestScalarExpr ansi2011 (fn ++ "(a)") $ App [Name Nothing fn] [Iden [Name Nothing "a"]]
+

website/index.asciidoc

@@ -401,4 +401,7 @@ generally available to work on these, so you should either make a pull
 request, or find someone willing to write the fixes and make a pull
 request.
 
+I wrote a tutorial on parsing SQL here:
+http://jakewheat.github.io/intro_to_parsing/
+