On 18 Říjen 2013, 17:52, Tom Lane wrote: > "Tomas Vondra" <t...@fuzzy.cz> writes: >> 2) Is there any particular reason why >> PlanForeignModify/BeginForeignModify >> require the fdw_private to be a List*, and not a generic pointer? > > That data has to be copiable by copyObject(), which a generic void* is > not. We could perhaps have made it Node* instead, but that would only > work conveniently if there were infrastructure for plugins to create new > first-class Node types; which there isn't. A List is often the easiest > way to transport a few random values from plan time to execution time, > so it seemed best to declare fdw_private that way.
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Oh, I see. Thanks for explanation. Tomas -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
