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The Asylum full-text search will normally find messages that contain one or all words entered in the search criteria. The results are then ranked based on a score derived from the number of words found and their proximity to one another. To improve your search results, you may also use the following operators:

A leading plus sign indicates that this word must be present in every row returned.
A leading minus sign indicates that this word must not be present in any row returned.
By default (when neither plus nor minus is specified) the word is optional, but the rows that contain it will be rated higher. This mimics the behavior of MATCH() ... AGAINST() without the IN BOOLEAN MODE modifier.
< >
These two operators are used to change a word's contribution to the relevance value that is assigned to a row. The < operator decreases the contribution and the > operator increases it. See the example below.
( )
Parentheses are used to group words into subexpressions.
A leading tilde acts as a negation operator, causing the word's contribution to the row relevance to be negative. It's useful for marking noise words. A row that contains such a word will be rated lower than others, but will not be excluded altogether, as it would be with the - operator.
An asterisk is the truncation operator. Unlike the other operators, it should be appended to the word, not prepended.

And here are some examples:

apple banana
find rows that contain at least one of these words.
+apple +juice
... both words.
+apple macintosh
... word ``apple'', but rank it higher if it also contain ``macintosh''.
+apple -macintosh
... word ``apple'' but not ``macintosh''.
+apple +(>pie <strudel)
... ``apple'' and ``pie'', or ``apple'' and ``strudel'' (in any order), but rank ``apple pie'' higher than ``apple strudel''.
... ``apple'', ``apples'', ``applesauce'', and ``applet''.

Search Quirks:

String order
If your query fails, try switching around the order of the words. For example:
    This query, 'sacd +audionote +sony', fails.
    But this one, 'sacd +sony +audionote' , works.
It appears to be unpredictable as:
    This query, 'sacd +transport -sony +cd' works.
    And this one, 'sacd +cd +transport -sony' doesn't.
Using wildcards
Again the order of the words and where the wildcards are placed can cause different results.
    This query, 'sacd +transport +scd* +dac', works.
    But this one, 'sacd +scd* +transport +dac', and other combinations fail.
Using AND and OR boolean modes
If you use the advanced operators above like the + and -, then selecting 'AND' is unnecessary. Otherwise, selecting 'AND' will cause all words to be prefaced with the '+' operator except those enclosed in parentheses, (), or with a '-' operator.
We hope that these issues will be resolved in the next release of mySQL. If you notice other problems or wish to request enhancements, please post a message on the Feedback/Support Forum.

Note: The following common words are not indexed:

a a's able about above according accordingly across
actually after afterwards again against ain't all allow
allows almost alone along already also although always
am among amongst an and another any anybody
anyhow anyone anything anyway anyways anywhere apart appear
appreciate appropriate are aren't around as aside ask
asking associated at available away awfully b be
became because become becomes becoming been before beforehand
behind being believe below beside besides best better
between beyond both brief but by c c'mon
c's came can can't cannot cant cause causes
certain certainly changes clearly co com come comes
concerning consequently consider considering contain containing contains corresponding
could couldn't course currently d definitely described despite
did didn't different do does doesn't doing don't
done down downwards during e each edu eg
eight either else elsewhere enough entirely especially et
etc even ever every everybody everyone everything everywhere
ex exactly example except f far few fifth
first five followed following follows for former formerly
forth four from further furthermore g get gets
getting given gives go goes going gone got
gotten greetings h had hadn't happens hardly has
hasn't have haven't having he he's hello help
hence her here here's hereafter hereby herein hereupon
hers herself hi him himself his hither hopefully
how howbeit however i i'd i'll i'm i've
ie if ignored immediate in inasmuch inc indeed
indicate indicated indicates inner insofar instead into inward
is isn't it it'd it'll it's its itself
j just k keep keeps kept know knows
known l last lately later latter latterly least
less lest let let's like liked likely little
look looking looks ltd m mainly many may
maybe me mean meanwhile merely might more moreover
most mostly much must my myself n name
namely nd near nearly necessary need needs neither
never nevertheless new next nine no nobody non
none noone nor normally not nothing novel now
nowhere o obviously of off often oh ok
okay old on once one ones only onto
or other others otherwise ought our ours ourselves
out outside over overall own p particular particularly
per perhaps placed please plus possible presumably probably
provides q que quite qv r rather rd
re really reasonably regarding regardless regards relatively respectively
right s said same saw say saying says
second secondly see seeing seem seemed seeming seems
seen self selves sensible sent serious seriously seven
several shall she should shouldn't since six so
some somebody somehow someone something sometime sometimes somewhat
somewhere soon sorry specified specify specifying still sub
such sup sure t t's take taken tell
tends th than thank thanks thanx that that's
thats the their theirs them themselves then thence
there there's thereafter thereby therefore therein theres thereupon
these they they'd they'll they're they've think third
this thorough thoroughly those though three through throughout
thru thus to together too took toward towards
tried tries truly try trying twice two u
un under unfortunately unless unlikely until unto up
upon us use used useful uses using usually
v value various very via viz vs w
want wants was wasn't way we we'd we'll
we're we've welcome well went were weren't what
what's whatever when whence whenever where where's whereafter
whereas whereby wherein whereupon wherever whether which while
whither who who's whoever whole whom whose why
will willing wish with within without won't wonder
would would wouldn't x y yes yet you
you'd you'll you're you've your yours yourself yourselves
z zero