| From: | Gregory Stark <stark(at)enterprisedb(dot)com> |
|---|---|
| To: | "Bruce Momjian" <bruce(at)momjian(dot)us> |
| Cc: | "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>, <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Index AM change proposals, redux |
| Date: | 2008-04-10 06:34:45 |
| Message-ID: | 878wzmusje.fsf@oxford.xeocode.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
>> * Proposed changes to allow amgetnext to return the actual index keys,
>> allowing certain types of "unindexable" quals to be checked without
>> having to fetch the heap entry. For example a LIKE condition could be
>> fully checked against the index entry.
In the extreme we could build tuples and push them up several nodes -- even
including joins -- before fetching the rest of the attributes from the heap.
--
Gregory Stark
EnterpriseDB http://www.enterprisedb.com
Get trained by Bruce Momjian - ask me about EnterpriseDB's PostgreSQL training!
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