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POHow to implement search on column of varchar type
 

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  1. POHow to implement search on column of varchar type
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    <p>I have a table <code>tblJobs</code> on which I want to implement search on a column <code>JobDescription</code>. I</p> <p>I have more than 70,000 rows in this table. I successfully implemented this, but the way I used is too slow. </p> <p>Can anyone pls help me to sort out this problem? The SQL stored procedure I am using is this:</p> <pre><code> Create Procedure Sp_SearchJobs ( @SearchValue varchar(Max) ) AS BEGIN WITH SplitTblJobs AS ( SELECT tbljobs.*, s.ListValue FROM tbljobs tbljobs CROSS APPLY dbo.FN_ListToTable(' ',tbljobs.JobDescription) AS s ) , WordMatchCount AS ( SELECT s.JobID,COUNT(*) AS CountOfWordMatch FROM dbo.FN_ListToTable('',@SearchValue) v INNER JOIN SplitTblJobs s ON v.ListValue=s.ListValue GROUP BY s.JobID HAVING COUNT(*)&gt;0 ) , SearchLen AS ( SELECT n.Number,SUBSTRING(@SearchValue,1,n.Number) AS PartialSearchValue FROM Numbers n WHERE n.Number&lt;=LEN(@SearchValue) ) , MatchLen AS ( SELECT tbljobs.JobID,MAX(l.Number) MatchStartLen FROM tbljobs tbljobs LEFT OUTER JOIN SearchLen l ON LEFT(tbljobs.JobDescription,l.Number)=l.PartialSearchValue GROUP BY tbljobs.JobID ) SELECT tbljobs.*,w.CountOfWordMatch,m.MatchStartLen FROM tbljobs tbljobs LEFT OUTER JOIN WordMatchCount w ON tbljobs.JobID=w.JobID LEFT OUTER JOIN MatchLen m ON tbljobs.JobID=m.JobID WHERE w.CountOfWordMatch&gt;0 ORDER BY w.CountOfWordMatch DESC,m.MatchStartLen DESC,LEN(tbljobs.JobDescription) DESC,tbljobs.JobDescription ASC END </code></pre> <p>Here in the function there is a function used. The code for that table-valued function is this:</p> <pre><code> Create FUNCTION [dbo].[FN_ListToTable] ( @SplitOn char(1) ,@List varchar(8000) ) RETURNS TABLE AS RETURN ( SELECT ListValue FROM (SELECT LTRIM(RTRIM(SUBSTRING(List2, number+1, CHARINDEX(@SplitOn, List2, number+1)-number - 1))) AS ListValue FROM ( SELECT @SplitOn + @List + @SplitOn AS List2 ) AS dt INNER JOIN dbo.Numbers n ON n.Number &lt; LEN(dt.List2) WHERE SUBSTRING(List2, number, 1) = @SplitOn ) dt2 WHERE ListValue IS NOT NULL AND ListValue!=''); </code></pre> <p>There is another table used here . The structure of that is as follows:</p> <pre><code> CREATE TABLE [dbo].[Numbers] ( [Number] [int] IDENTITY(1,1) NOT NULL, CONSTRAINT [PK_Numbers] PRIMARY KEY CLUSTERED ( [Number] ASC ) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY] GO </code></pre> <p>To make this procedure to run ..</p> <ol> <li>Make table described above</li> <li>Make function</li> <li>Make stored procedure.</li> </ol> <p>I want to implement search on decscription column of <code>tbljobs</code>.</p>
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