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

SELECT t1.col_int, t1.col_chr, t1.col_bigint 
FROM tbl_bigint_l t1, tbl_bigint_r t2 
WHERE t1.col_bigint = t2.col_bigint OR ( t1.col_bigint IS NULL AND t2.col_bigint IS NULL );