framework/resources/Functional/joins/nulleqjoin/neqjn_vrchr.q

SELECT t1.col_vrchr1 , t2.col_vrchr1 
FROM typeall_l t1, typeall_r t2 
WHERE t1.col_vrchr1 = t2.col_vrchr1 OR ( t1.col_vrchr1 IS NULL AND t2.col_vrchr1 IS NULL );