This module includes the
+ method. It is included in
StringExpression and can be included elsewhere to allow the
use of the + operator to represent concatenation of SQL Strings:
Public Instance methods
StringExpression representing the concatenation of
the receiver with the given argument.
:x.sql_string + :y => # "x" || "y"
# File lib/sequel/sql.rb, line 888 def +(ce) StringExpression.new(:'||', self, ce) end