lib/veritas/sql/generator.rb in veritas-sql-generator-0.0.3 vs lib/veritas/sql/generator.rb in veritas-sql-generator-0.0.4

@@ -3,20 +3,28 @@
 require 'date'
 require 'time'
 
 require 'veritas'
 
-require 'veritas/base_relation'
+require 'veritas/sql/generator/core_ext/date'
+require 'veritas/sql/generator/core_ext/date_time'
 
 require 'veritas/sql/generator/visitor'
 
 require 'veritas/sql/generator/identifier'
 require 'veritas/sql/generator/attribute'
 require 'veritas/sql/generator/direction'
 require 'veritas/sql/generator/literal'
-require 'veritas/sql/generator/logic'
 
+require 'veritas/sql/generator/function'
+require 'veritas/sql/generator/function/aggregate'
+require 'veritas/sql/generator/function/connective'
+require 'veritas/sql/generator/function/numeric'
+require 'veritas/sql/generator/function/predicate'
+require 'veritas/sql/generator/function/proposition'
+require 'veritas/sql/generator/function/string'
+
 require 'veritas/sql/generator/relation'
 require 'veritas/sql/generator/relation/unary'
 require 'veritas/sql/generator/relation/base'
 require 'veritas/sql/generator/relation/binary'
 require 'veritas/sql/generator/relation/set'
@@ -27,9 +35,24 @@
   module SQL
     module Generator
 
       # Raised when an invalid relation is visited
       class InvalidRelationError < StandardError; end
+
+      LEFT_PARENTHESIS  = '('.freeze
+      RIGHT_PARENTHESIS = ')'.freeze
+
+      # Return a parenthesized SQL statement (inline modification)
+      #
+      # @param [#to_s] sql
+      #
+      # @return [#to_s]
+      #   same instance as sql
+      #
+      # @api private
+      def self.parenthesize!(sql)
+        sql.insert(0, LEFT_PARENTHESIS) << RIGHT_PARENTHESIS
+      end
 
     end # module Generator
   end # module SQL
 end # module Veritas