# File lib/jdbc_adapter/jdbc_derby.rb, line 218 def execute(sql, name = nil) if sql =~ /^\s*(UPDATE|INSERT)/i i = sql =~ /\swhere\s/im if i sql[i..-1] = sql[i..-1].gsub(/!=\s*NULL/, 'IS NOT NULL').gsub(/=\sNULL/i, 'IS NULL') end else sql.gsub!(/= NULL/i, 'IS NULL') end super end