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Using VALUES IDENTITY_VAL_LOCAL()

When using the "VALUES IDENTITY_VAL_LOCAL()" statement immediately following an insertion into a table with an identity column, how can I be sure I am receiving back the value just inserted for my transaction and not that of another user who may have also attempted an insert?

Well, the short answer is because that is the way IBM coded the function to work. The IDENTITY_VAL_LOCAL() function...

will return the last inserted identity value. Each INSERT statement involving an IDENTITY column causes the identity value to be copied into connection-specific storage in DB2. Thus, the most recent identity value is used for a connection, regardless of what is happening with other concurrent user connections.

Be sure to read the information in the DB2 SQL Reference manual for the IDENTITY_VAL_LOCAL() function thoroughly to understand what will be returned and why.

This was last published in October 2002

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