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POSQL Server Fulltext search not finding my rows
 

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  1. POSQL Server Fulltext search not finding my rows
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    <p>I have a SQL Server table and I'm trying to make sense of fulltext searching :-)</p> <p>I have set up a fulltext catalog and a fulltext index on a table <code>Entry</code>, which contains among other columns a <code>VARCHAR(20)</code> column called <code>VPN-ID</code>.</p> <p>There are about 200'000 rows in that table, and the <code>VPN-ID</code> column has values such as:</p> <pre><code>VPN-000-359-90 VPN-000-363-85 VPN-000-362-07 VPN-000-362-91 VPN-000-355-55 VPN-000-368-36 VPN-000-356-90 </code></pre> <p>Now I'm trying to find rows in that table with a fulltext enabled search.</p> <p>When I do</p> <pre><code>SELECT (list of columns) FROM dbo.Entry WHERE CONTAINS(*, 'VPN-000-362-07') </code></pre> <p>everything's fine and dandy and my rows are returned.</p> <p>When I start searching with a wildcard like this:</p> <pre><code>SELECT (list of columns) FROM dbo.Entry WHERE CONTAINS(*, 'VPN-000-362-%') </code></pre> <p>I am getting results and everything seems fine.</p> <p><strong>HOWEVER:</strong> when I searching like this:</p> <pre><code>SELECT (list of columns) FROM dbo.Entry WHERE CONTAINS(*, 'VPN-000-36%') </code></pre> <p>suddenly I get no results back at all..... even though there are <strong>clearly</strong> rows that match that search criteria...</p> <p>Any ideas why?? What other "surprises" might fulltext search have in store for me? :-)</p> <p><em>Update:</em> to create my fulltext catalog I used:</p> <pre><code>CREATE FULLTEXT CATALOG MyCatalog WITH ACCENT_SENSITIVITY = OFF </code></pre> <p>and to create the fulltext index on my table, I used</p> <pre><code>CREATE FULLTEXT INDEX ON dbo.Entry(list of columns) KEY INDEX PK_Entry </code></pre> <p>I tried to avoid any "oddball" options as much a I could.</p> <p><strong>Update #2:</strong> after a bit more investigation, it appears as if SQL Server Fulltext search somehow interprets my dashes inside the strings as separators....</p> <p>While this query returns nothing:</p> <pre><code>SELECT (list of columns) FROM dbo.Entry WHERE CONTAINS(*, '"VPN-000-362*"') </code></pre> <p>this one does (splitting up the search term on the dashes):</p> <pre><code>SELECT (list of columns) FROM dbo.Entry WHERE CONTAINS(*, ' "VPN" AND "000" AND "362*"') </code></pre> <p>OK - seems a bit odd that a dash appears to result in a splitting up that somehow doesn't work.....</p>
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    1. This table or related slice is empty.
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    1. This table or related slice is empty.
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    1. COcould you add the code, which created the fulltext-index/catalog? maybe there are some freakin' options ...
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      1. USAndreas Niedermair
    2. COI think the `-` is just treated as a word breaking character and not used in the search at all. `SELECT * FROM sys.dm_fts_parser('"VPN-000-362*"',1033,NULL,0)`
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      1. USMartin Smith
    3. COThough if you change the language parameter one of the `-` gets preserved. `SELECT * FROM sys.dm_fts_parser('"VPN-000-362*"',0,NULL,0)`. Strange! Don't know what the rules are here.
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      1. USMartin Smith
 

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