PLS-00619: the first operand in the NULLIF expression must not be NULL
Cause: The first operand in the NULLIF expression is the literal NULL.
Action: Change the first operand in the NULLIF expression to be non-NULL.
Cause: The first operand in the NULLIF expression is the literal NULL.
Action: Change the first operand in the NULLIF expression to be non-NULL.
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