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Editorial Team
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Asked: 2026-06-14T12:58:06+00:00

Is there a difference in behaviour of DB2 on AS400 machines when it comes

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Is there a difference in behaviour of DB2 on AS400 machines when it comes to handling not-nullable columns?

Someone just told me that if you insert a null value into a column with not null, on DB2 as400 it will work (sounds strange I know) , but will throw an error if Db2 is running on Windows.

I am going to verify this as soon as I get hold of the environment, still want to know if someone has ever heard of such a thing.

Closing Note:
It was a schema that had changed over time… so the column had changed across releases, which led to the confusion.

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1 Answer

  1. Editorial Team

    I would say the answer is no. Here’s a quick test I performed using interactive SQL (STRSQL) on V7R1:

    CREATE TABLE QTEMP/TEST (F1 INT, F2 INT NOT NULL, F3 INT NOT NULL WITH DEFAULT);
INSERT INTO QTEMP/TEST (F1, F2, F3) VALUES(NULL, NULL, NULL);
Null values not allowed in column or variable F2.
INSERT INTO QTEMP/TEST (F1, F2, F3) VALUES(NULL, 0, NULL);
Null values not allowed in column or variable F3.
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