Appends a locking clause to a SQL statement. *Modifies the sql
parameter*.
# SELECT * FROM suppliers FOR UPDATEadd_lock!'SELECT * FROM suppliers',:lock=>trueadd_lock!'SELECT * FROM suppliers',:lock=>' FOR UPDATE'
# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 106
def add_lock!(sql, options)
case lock = options[:lock]
when true: sql << ' FOR UPDATE'
when String: sql << " #{lock}"
end
end
