Zoltan Boszormenyi írta:
The cost I am thinking now is an extra heap_update()
after heap_insert() without generating the identity value
and inserting index tuples to indexes that doesn't
contain the identity column.

And as far as I tested the current state, there is no cost
if you don't use GENERATED or IDENTITY.
The extra heap_update() would be performed only
if you have an IDENTITY colum.

The modification I imagined is actually working:
- skip indexes using the identity columns
- do a simple_heap_update() after all other columns are
 assigned and index tuples are inserted
- do ExecInsertIndexTuples() on indexes referencing
 the IDENTITY column

However, I get warning messages like:

WARNING:  detected write past chunk end in ExecutorState 0xaaff68

How can I prevent them?

Best regards,
Zoltán Böszörményi

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