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POUnexpected behaviour in MySQL with Boolean-Mode-Query with quoted hyphenated string
 

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  1. POUnexpected behaviour in MySQL with Boolean-Mode-Query with quoted hyphenated string
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    <p>I have a problem or rather an understanding problem with a hyphenated searchstring which is quoted.</p> <p>In my Table there is a table with a column 'company'.<br> One of the entries in that column is: <strong>A-Z Electro</strong></p> <p>The following examples are simplified a lot (though the real query is much more complex) - but the effect is still the same.</p> <p>When I do the following search, I don't get the row with the above mentioned company:</p> <pre><code>SELECT i.* FROM my_table i WHERE MATCH (i.company) AGAINST ('+\"A-Z\" +Electro*' IN BOOLEAN MODE) GROUP BY i.uid ORDER BY i.company ASC LIMIT 0, 40; </code></pre> <p>If I do the following search, get the row with the above mentioned company (notice only changed the - to a + before \"A-Z\":</p> <pre><code>SELECT i.* FROM my_table i WHERE MATCH (i.company) AGAINST ('-\"A-Z\" +Electro*' IN BOOLEAN MODE) GROUP BY i.uid ORDER BY i.company ASC LIMIT 0, 40; </code></pre> <p>I also get the row, if I remove the operator completely:</p> <pre><code>SELECT i.* FROM my_table i WHERE MATCH (i.company) AGAINST ('\"A-Z\" +Electro*' IN BOOLEAN MODE) GROUP BY i.uid ORDER BY i.company ASC LIMIT 0, 40; </code></pre> <p>Can anyone explain to me this behaviour? Because I would expect, when searching with a +, I should get the result too...</p> <p><strong>EDIT</strong></p> <p>I just checked the table index with myisam_ftdump. Two-Character-Words are indexed properly as there are entries like<br> 14f2e8 0.7908264 ab<br> 3a164 0.8613265 dv </p> <p>There is also an entry:<br> de340 0.6801047 az<br> I suppose this should be the entry for A-Z - so the search should find this entry, shouldn't it?</p>
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