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module Arel
class Relation
def to_sql(formatter = Sql::SelectStatement.new(self))
formatter.select select_sql, self
end
def select_sql
[
"SELECT #{attributes.collect { |a| a.to_sql(Sql::SelectClause.new(self)) }.join(', ')}",
"FROM #{table_sql(Sql::TableReference.new(self))}",
(joins(self) unless joins(self).blank? ),
("WHERE #{wheres .collect { |w| w.to_sql(Sql::WhereClause.new(self)) }.join("\n\tAND ")}" unless wheres.blank? ),
("GROUP BY #{groupings.collect { |g| g.to_sql(Sql::GroupClause.new(self)) }.join(', ')}" unless groupings.blank? ),
("ORDER BY #{orders .collect { |o| o.to_sql(Sql::OrderClause.new(self)) }.join(', ')}" unless orders.blank? ),
("LIMIT #{taken}" unless taken.blank? ),
("OFFSET #{skipped}" unless skipped.blank? )
].compact.join("\n")
end
def inclusion_predicate_sql
"IN"
end
def christener
@christener ||= Sql::Christener.new
end
end
end
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