Re: [SQL] "SELECT IN" Still Broken in 7.4b

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От Christopher Kings-Lynne
Тема Re: [SQL] "SELECT IN" Still Broken in 7.4b
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Msg-id 00f201c3684e$6b943a40$2800a8c0@mars
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Ответ на Re: [SQL] "SELECT IN" Still Broken in 7.4b  (Tom Lane <tgl@sss.pgh.pa.us>)
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> I'm toying with the notion of ripping out that logic and instead
> building an in-memory hashtable of already-returned TIDs.  This could
> theoretically run out of memory if the multiple indexscan returns enough
> tuples, but I think in practice that wouldn't happen because the planner
> wouldn't choose an indexscan when very large numbers of tuples are being
> selected.
> 
> Comments?

Sounds kind of like a bitmap index almost..

Chris

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