Setting null value to Integer column field in Prepared Statement Setter

Question

Till I know, the correct way to do this is:

ps.setNull(1, java.sql.Types.INTEGER);

However, on execution, my database column value is showing 4 instead of null.

On checking found that 4 is the static constant value for Types INTEGER.

Where could be the issue ?

Is it related to driver ?

The database is DB2.

Answer 1

可能有一个触发器，可以在插入或更新时修改数据。