module Sequel::SQL::CastMethods - Sequel: The Database Toolkit for Ruby

Source

    # File lib/sequel/sql.rb
695 def cast(sql_type)
696   Cast.new(self, sql_type)
697 end

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))

cast_numeric (sql_type = nil)

Source

    # File lib/sequel/sql.rb
705 def cast_numeric(sql_type = nil)
706   Cast.new(self, sql_type || Integer).sql_number
707 end

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)

cast_string (sql_type = nil)

Source

    # File lib/sequel/sql.rb
715 def cast_string(sql_type = nil)
716   Cast.new(self, sql_type || String).sql_string
717 end

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)