module Sequel::SQL::CastMethods
Holds methods that are used to cast objects to different SQL
types.
Public Instance Methods
cast(sql_type)
click to toggle source
Cast
the reciever to the given SQL
type. You can specify a ruby class as a type, and it is handled similarly to using a database independent type in the schema methods.
Sequel.function(:func).cast(:integer) # CAST(func() AS integer) Sequel.function(:func).cast(String) # CAST(func() AS varchar(255))
# File lib/sequel/sql.rb 692 def cast(sql_type) 693 Cast.new(self, sql_type) 694 end
cast_numeric(sql_type = nil)
click to toggle source
Cast
the reciever to the given SQL
type (or the database’s default Integer type if none given), and return the result as a NumericExpression
, so you can use the bitwise operators on the result.
Sequel.function(:func).cast_numeric # CAST(func() AS integer) Sequel.function(:func).cast_numeric(Float) # CAST(func() AS double precision)
# File lib/sequel/sql.rb 702 def cast_numeric(sql_type = nil) 703 Cast.new(self, sql_type || Integer).sql_number 704 end
cast_string(sql_type = nil)
click to toggle source
Cast
the reciever to the given SQL
type (or the database’s default String
type if none given), and return the result as a StringExpression
, so you can use + directly on the result for SQL
string concatenation.
Sequel.function(:func).cast_string # CAST(func() AS varchar(255)) Sequel.function(:func).cast_string(:text) # CAST(func() AS text)
# File lib/sequel/sql.rb 712 def cast_string(sql_type = nil) 713 Cast.new(self, sql_type || String).sql_string 714 end