From bdca9ed42ffea10aa6989ea3ecebedb424fa01ed Mon Sep 17 00:00:00 2001
From: Bryan Helmkamp <bryan@brynary.com>
Date: Sun, 17 May 2009 14:20:29 -0400
Subject: moved sql related code to its own engine area

Conflicts:

	lib/arel/engine.rb
	lib/arel/extensions/object.rb
	lib/arel/predicates.rb
	lib/arel/primitives/attribute.rb
	lib/arel/primitives/expression.rb
	lib/arel/primitives/value.rb
	lib/arel/relations/operations/join.rb
	lib/arel/relations/relation.rb
	lib/arel/relations/utilities/externalization.rb
	lib/arel/relations/utilities/nil.rb
	lib/arel/relations/writes/delete.rb
	lib/arel/relations/writes/insert.rb
	lib/arel/relations/writes/update.rb
	spec/arel/unit/relations/skip_spec.rb
	spec/arel/unit/relations/take_spec.rb
	spec/spec_helper.rb
---
 lib/arel/engines/sql/extensions/array.rb     | 9 +++++++++
 lib/arel/engines/sql/extensions/nil_class.rb | 5 +++++
 lib/arel/engines/sql/extensions/object.rb    | 9 +++++++++
 lib/arel/engines/sql/extensions/range.rb     | 9 +++++++++
 4 files changed, 32 insertions(+)
 create mode 100644 lib/arel/engines/sql/extensions/array.rb
 create mode 100644 lib/arel/engines/sql/extensions/nil_class.rb
 create mode 100644 lib/arel/engines/sql/extensions/object.rb
 create mode 100644 lib/arel/engines/sql/extensions/range.rb

(limited to 'lib/arel/engines/sql/extensions')

diff --git a/lib/arel/engines/sql/extensions/array.rb b/lib/arel/engines/sql/extensions/array.rb
new file mode 100644
index 0000000000..1daa5abca7
--- /dev/null
+++ b/lib/arel/engines/sql/extensions/array.rb
@@ -0,0 +1,9 @@
+class Array
+  def to_sql(formatter = nil)
+    "(" + collect { |e| e.to_sql(formatter) }.join(', ') + ")"
+  end
+
+  def inclusion_predicate_sql
+    "IN"
+  end
+end
\ No newline at end of file
diff --git a/lib/arel/engines/sql/extensions/nil_class.rb b/lib/arel/engines/sql/extensions/nil_class.rb
new file mode 100644
index 0000000000..729c4cada7
--- /dev/null
+++ b/lib/arel/engines/sql/extensions/nil_class.rb
@@ -0,0 +1,5 @@
+class NilClass
+  def equality_predicate_sql
+    'IS'
+  end
+end
\ No newline at end of file
diff --git a/lib/arel/engines/sql/extensions/object.rb b/lib/arel/engines/sql/extensions/object.rb
new file mode 100644
index 0000000000..ef990eee2f
--- /dev/null
+++ b/lib/arel/engines/sql/extensions/object.rb
@@ -0,0 +1,9 @@
+class Object
+  def to_sql(formatter)
+    formatter.scalar self
+  end
+
+  def equality_predicate_sql
+    '='
+  end
+end
\ No newline at end of file
diff --git a/lib/arel/engines/sql/extensions/range.rb b/lib/arel/engines/sql/extensions/range.rb
new file mode 100644
index 0000000000..d7329efe34
--- /dev/null
+++ b/lib/arel/engines/sql/extensions/range.rb
@@ -0,0 +1,9 @@
+class Range
+  def to_sql(formatter = nil)
+    formatter.range self.begin, self.end
+  end
+  
+  def inclusion_predicate_sql
+    "BETWEEN"
+  end
+end
\ No newline at end of file
-- 
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