Need help with SQL Code (for basic site search)

  • scott231us

    SSC Enthusiast

    Points: 140

    Hi, the basic search on my site is too specific.. Meaning it's too exact with word order and phrases.

    For example, if I search Shoes Red it won't show results for Red Shoes.

    If you search for Red Shoe Laces it won't show results for Red Laces (as the word shoe throws off this order). Below is the code that I believe the search box is using. Can anyone tell me how to "loosen" up this search so it's either more broad or so exact word order isn't necessary?

    This is the current code:

    case 'search':

    if (intval($filter) != 0) {

    $filter = JString::strtolower($filter);

    $id = intval($filter);

    $search .= $temp."(a.id = $id OR LOWER(a.ad_headline) LIKE '%".$this->_db->getEscaped($filter,true)."%' OR LOWER(a.ad_text) LIKE '%".$this->_db->getEscaped($filter,true)."%')";

    } else {

    $filter = JString::strtolower($filter);

    $search .= $temp."(LOWER(a.ad_headline) LIKE '%".$this->_db->getEscaped($filter,true)."%' OR LOWER(a.ad_text) LIKE '%".$this->_db->getEscaped($filter,true)."%')";

    }

    break;

    }

    }

    }

    return $search;

    }

    Any ideas here?

  • Lowell

    SSC Guru

    Points: 323349

    Scott i suspect you posted some code for MYSQL and not SQL Server.

    In SQLServer, the best solution is to enable Full Text Indexing, and use that;

    for exact word match, but any order, i posted this example a long time ago, which was using dynamic SQL to build a query for search terms; unfortunately, this kind of query isslow, since it requires a table scan. That might be acceptable for small tables, but the more data, the more this would suffer performance wise:

    example results:

    WHERE CHARINDEX('civil',YOURTABLE.COLUMNNAME) > 0

    OR CHARINDEX('war',YOURTABLE.COLUMNNAME) > 0

    OR CHARINDEX('memorabilia',YOURTABLE.COLUMNNAME) > 0

    OR CHARINDEX('equipment',YOURTABLE.COLUMNNAME) > 0

    --better format

    DECLARE @SEARCHSTRING VARCHAR(8000),

    @ALLSEARCHTERMS VARCHAR(8000),

    @SOMESEARCHTERMS VARCHAR(8000),

    @COLUMNNAME VARCHAR(128),

    @vbCrLf CHAR(2)

    SET @SEARCHSTRING='civil war memorabilia equipment'

    SET @COLUMNNAME = 'YOURTABLE.COLUMNNAME'

    SET @vbCrLf = CHAR(13) + CHAR(10)

    SELECT

    @ALLSEARCHTERMS = 'WHERE CHARINDEX(''' + REPLACE(@SEARCHSTRING,' ',''',' + @COLUMNNAME + ') > 0 ' + @vbCrLf + ' AND CHARINDEX(''') + ''',' + @COLUMNNAME + ') > 0' + @vbCrLf,

    @SOMESEARCHTERMS = 'WHERE CHARINDEX(''' + REPLACE(@SEARCHSTRING,' ',''',' + @COLUMNNAME + ') > 0 ' + @vbCrLf + ' OR CHARINDEX(''') + ''',' + @COLUMNNAME + ') > 0' + @vbCrLf

    SELECT @ALLSEARCHTERMS

    SELECT @SOMESEARCHTERMS

    Lowell


    --help us help you! If you post a question, make sure you include a CREATE TABLE... statement and INSERT INTO... statement into that table to give the volunteers here representative data. with your description of the problem, we can provide a tested, verifiable solution to your question! asking the question the right way gets you a tested answer the fastest way possible!

  • scott231us

    SSC Enthusiast

    Points: 140

    Oh yes you're right, it's code for MySQL, so don't think your fix would work for that unfortunately?

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