> 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?
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