Re: Search for whole words in MySQL 3.23

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TG -

This is exactly what I was looking for. Thanks a bunch.

Zeth

On 6/13/07, tg-php@xxxxxxxxxxxxxxxxxxxxxx <tg-php@xxxxxxxxxxxxxxxxxxxxxx>
wrote:

I suck at regex, but looks like 3.23 may actually support it.  And most
regex implementations have a word boundary code for doing exactly what
you're talking about.

Referring to this page: http://dev.mysql.com/doc/refman/4.1/en/regexp.html

I found this example.. hopefully it'll help you (and work ok in 3.23):

[[:<:]], [[:>:]]

These markers stand for word boundaries. They match the beginning and end
of words, respectively. A word is a sequence of word characters that is not
preceded by or followed by word characters. A word character is an
alphanumeric character in the alnum class or an underscore (_).

mysql> SELECT 'a word a' REGEXP '[[:<:]]word[[:>:]]';   -> 1
mysql> SELECT 'a xword a' REGEXP '[[:<:]]word[[:>:]]';  -> 0


-TG

= = = Original message = = =

Hi all,

I'm setting up a database search on a site, where I will essentially be
BOOLEAN searching about 6 database fields. Unfortunately, the database I'm
using is MySQL version 3.23 (completely out of my control), so I cannot
use
IN BOOLEAN MODE to simplify the process on my end. I've been able to put
together a function that does almost everything that I want, but I'm
running
into a problem - searching for whole words that may or may not be in the
beginning or end of the database field. For example, syntax like this:

...WHERE `field` LIKE '%searchterm%'...

has the limitation that if the search term is 'car', it will also bring
back
'scar', 'cartoon', etc.

While if the syntax is:

...WHERE `field` LIKE '% searchterm %'... (with spaces)

it misses words that are the first or last words of the field, or words
that
are at the end of sentences, before commas, etc.

I've looked around and haven't been able to find a way to search only for
complete words within a block of text. Any help?

Thanks in advance,
Zeth


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