* Allow arbitrary sets of nested parens around values. Thanks to _W_ …

…in #sql

lib/guillotine/parser/primitives.treetop

@@ -2,6 +2,24 @@ module Guillotine
   module Parser
     grammar SQLPrimitives
       rule primitive
+        open_parens primitive close_parens {
+           def eval
+            simple_primitive.eval
+          end
+        }
+        /
+        simple_primitive
+      end
+
+      rule open_parens
+        '('
+      end
+
+      rule close_parens
+        ')'
+      end
+
+      rule simple_primitive
         datetime / date / boolean / quoted_string / backtick_string / number / string
       end
 

spec/guillotine/parser/sql_select_spec.rb

@@ -126,6 +126,14 @@ module Parser
         select = parse_and_eval_with_upcasing(first_statement)
         select.where.key.should equal(:foo)
       end
+
+      it "should parse a paren around a value" do
+        parse("SELECT * FROM foo WHERE id = (7)").should_not be_nil
+      end
+
+      it "should parse two parens around a value" do
+        parse("SELECT * FROM foo WHERE id = ((7))").should_not be_nil
+      end
     end
   end
 end