[jira] [Created] (CASSANDRA-7379) updating a row with composite key with a null value removes the entire row

["Ashot Golovenko (JIRA)" <ji...@apache.org>]

Ashot Golovenko created CASSANDRA-7379:
------------------------------------------

             Summary: updating a row with composite key with a null value removes the entire row
                 Key: CASSANDRA-7379
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7379
             Project: Cassandra
          Issue Type: Bug
          Components: Core
            Reporter: Ashot Golovenko
            Priority: Critical


create a table

CREATE TABLE relation (
    u1 bigint,
    u2 bigint,
    mf int,
    PRIMARY KEY (u1, u2));

insert value:
UPDATE facebook_user_relation SET mf = 1 WHERE u1 = 1 and u2 = 2;

SELECT * from relation ;

 u1 | u2 | mf
----+----+----
  1 |  2 |  1

insert null value:
UPDATE relation SET mf = null WHERE u1 = 1 and u2 = 2;

SELECT * from relation ;

(0 rows) <--- WRONG!

The INSERT statement however works:
INSERT INTO relation (u1, u2, mf) VALUES (1, 2, null); 

SELECT * from relation ;

 u1 | u2 | mf
----+----+------
  1 |  2 | null

(1 rows)
 








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