为什么有些用户而不是其他用户得到 ORA-01400: cannot insert NULL into primary key

Question

I know how to fix it. I am just wondering why it worked on some developer machines and not others. I have replaced actual names and values for clarity.

INSERT INTO MYTABLE (COL2, COL3, COL4, COL5, COL6) 
SELECT 0, 1, 2, 3, 4

My fix is

INSERT INTO MYTABLE (COL1, COL2, COL3, COL4, COL5, COL6) 
SELECT MYTABLE_SEQ.NEXTVAL, 0, 1, 2, 3, 4

But why wasn't it necessary on all developer machines?

Answer 1

The same table behaves the same way, so - if all of them (developers) used the same INSERT statement, connected to the same database (user), they'd get the same result - either success or a failure.

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However, if they have their own schemas, then it depends on the way they created target tables.

Behaviour you described could be result of

• identity column (12c onwards)
• database trigger

which then "automatically", in the background , populate that NOT NULL column.