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-rw-r--r--lib/arel/engines/sql/primitives.rb18
1 files changed, 10 insertions, 8 deletions
diff --git a/lib/arel/engines/sql/primitives.rb b/lib/arel/engines/sql/primitives.rb
index c4968558a2..6f89723afe 100644
--- a/lib/arel/engines/sql/primitives.rb
+++ b/lib/arel/engines/sql/primitives.rb
@@ -3,7 +3,7 @@ module Arel
def column
original_relation.column_for(self)
end
-
+
def format(object)
object.to_sql(Sql::Attribute.new(self))
end
@@ -14,6 +14,8 @@ module Arel
end
class Value
+ delegate :inclusion_predicate_sql, :equality_predicate_sql, :to => :value
+
def to_sql(formatter = Sql::WhereCondition.new(relation))
formatter.value value
end
@@ -22,33 +24,33 @@ module Arel
object.to_sql(Sql::Value.new(relation))
end
end
-
+
class Expression < Attribute
def to_sql(formatter = Sql::SelectClause.new(relation))
formatter.expression self
end
end
-
+
class Count < Expression
def function_sql; 'COUNT' end
end
-
+
class Distinct < Expression
def function_sql; 'DISTINCT' end
end
-
+
class Sum < Expression
def function_sql; 'SUM' end
end
-
+
class Maximum < Expression
def function_sql; 'MAX' end
end
-
+
class Minimum < Expression
def function_sql; 'MIN' end
end
-
+
class Average < Expression
def function_sql; 'AVG' end
end