> The global temporary tables has persistent rows in the catalogue. The
> mapping to files can be marked as special and real mapping should be
> only in memory.
> So the changes in catalogue related to global temporary tables are
> pretty less frequently.

I'm afraid I still don't get it. Let say I have an application that
does `CREATE TEMP TABLE xx ; DROP TABLE xx` in every session all the
time. Naturally there is not only one temp table per session. Could you
explain please in more detail how exactly do these persistent rows help?

Best regards,
Aleksander Alekseev

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