Method: Sequel::SQL::Builders#value_list

Defined in:
lib/sequel/sql.rb

#value_list(arg) ⇒ Object

Return a SQL::ValueList created from the given array. Used if the array contains all two element arrays and you want it treated as an SQL value list (IN predicate) instead of as a conditions specifier (similar to a hash). This is not necessary if you are using this array as a value in a filter, but may be necessary if you are using it as a value with placeholder SQL:

DB[:a].where([:a, :b]=>[[1, 2], [3, 4]]) # SQL: (a, b) IN ((1, 2), (3, 4))
DB[:a].where('(a, b) IN ?', [[1, 2], [3, 4]]) # SQL: (a, b) IN ((1 = 2) AND (3 = 4))
DB[:a].where('(a, b) IN ?', Sequel.value_list([[1, 2], [3, 4]])) # SQL: (a, b) IN ((1, 2), (3, 4))

Raises:



682
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# File 'lib/sequel/sql.rb', line 682

def value_list(arg)
  raise Error, 'argument to Sequel.value_list must be an array' unless arg.is_a?(Array)
  SQL::ValueList.new(arg)
end