module Sequel::SQL::CastMethods
Holds methods that are used to cast objects to different SQL types.
Public Instance Methods
cast(sql_type)
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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, line 678 def cast(sql_type) Cast.new(self, sql_type) end
cast_numeric(sql_type = nil)
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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, line 688 def cast_numeric(sql_type = nil) Cast.new(self, sql_type || Integer).sql_number end
cast_string(sql_type = nil)
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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, line 698 def cast_string(sql_type = nil) Cast.new(self, sql_type || String).sql_string end