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From "Monsur Hossain" <>
Subject Sorting: single field vs multiple fields
Date Thu, 17 Nov 2005 16:18:33 GMT
Anyone have any ballpark stats about sorting a single field versus sorting
multiple fields?  I understand every implementation is different, but I'm
just trying to get a sense of what to expect before I revamp my index.  

We need fairly fine-grained sorting of items, so I have a field with the
date indexed in the following format:


This is too big for an int, so I sort it as a string.  I am debating storing
two integer fields like so:

FIELD #2: HHmm

And then sorting on field #1 and field #2.  The advantage is that I'm moving
from a string sort to an int sort; the disadvantage is I'm sorting on two
fields instead of one.  The index is about 30 million rows, and performance
is key.  Anyone have any performane numbers or implementation tips?


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