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From:Michael Widenius Date:June 30 1999 12:46pm
Subject:Re: blobs and concat
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>>>>> "Troy" == Troy Grady <troy@stripped> writes:

Troy> Monty/All-
Troy> In a related note:  I've written my own text index, which is essentially a
Troy> table with two columns -- a list of unique words, and a TEXT field
Troy> associated with each word containing a comma-delimited list of ids of
Troy> documents where the word can be found.  Ids are added to the TEXT field by
Troy> CONCAT-ing a comma and a new id to the end of the field.  So far,
Troy> performance has been great, but if what you're saying about fragmentation is
Troy> true it sounds like I can expect performance to slow as I continue to CONCAT
Troy> ids to the blobs.  I can't see any way around using CONCAT here, since
Troy> keeping the ids on one row is essentially what makes it an index.  If anyone
Troy> can think of another way of doing it, I'd appreciate the insight.
Troy> Otherwise, is this something that regular disk defragmentation can remedy?

Troy> Regards,

Troy> Troy


Note that you can fix the fragmentation by doing OPTIMIZE TABLE once
in a while.

blobs and concatJason S Gandhi30 Jun
  • blobs and concatMichael Widenius30 Jun
Re: blobs and concatTroy Grady30 Jun
  • Re: blobs and concatMichael Widenius30 Jun