OO and tuples of different types

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От Chris
Тема OO and tuples of different types
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Msg-id 389179E8.C3EE3816@bitmead.com
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Ответы Re: [HACKERS] OO and tuples of different types  (Tom Lane <tgl@sss.pgh.pa.us>)
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Came across this comment in execTuples.c...
*In the implementation of nested-dot queries such as*"retrieve (EMP.hobbies.all)", a single scan may return tuples*of
manytypes, so now we return pointers to tuple descriptors*along with tuples returned via the tuple table.  This
means*wenow have a bunch of routines to diddle the slot descriptors*too.  -cim 1/18/90
 

Hmm. Another few years of reading the source and I'll probably
understand all this :-) :-(.

Can anybody provide any insight? Like What EMP.hobbies.all meant in
postquel?

-- 
Chris Bitmead
mailto:chris@bitmead.com


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