Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

How to quickly search a NVARCHAR(MAX) FIELD?

Posted on 2011-03-02
7
Medium Priority
?
1,751 Views
Last Modified: 2012-05-11
The field CellText is NVARCHAR(MAX).  When I leave it out of the OR clause, this executes super fast, with it in, it's soooo slow!  What can I do?  FullTextSearch is on, but I'm not sure how to use it.

DECLARE @Keyword  nvarchar( 256 ) = 'maria''s'

DECLARE @Kw nvarchar(258) = '%' + @Keyword + '%'

SELECT * FROM tempdb.dbo.mh_stuff
WHERE (
            Title like @Kw
      OR
            Name LIKE @Kw
      OR
            CellText LIKE @Kw)
0
Comment
Question by:MariaHalt
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 5
7 Comments
 
LVL 26

Accepted Solution

by:
tigin44 earned 1000 total points
ID: 35021578
you should create a full text index as the one below...
you should replace some keywords with the correct ones.. like column name, table name, index name...

USE tempdb;
GO
CREATE UNIQUE INDEX ui_someUniqueInd ON dbo.mh_stuff(someColumnName);

CREATE FULLTEXT CATALOG ft AS DEFAULT;
CREATE FULLTEXT INDEX ON dbo.mh_stuff(CellText)
   KEY INDEX ui_ ui_someUniqueInd
   WITH STOPLIST = SYSTEM;
GO
0
 

Author Comment

by:MariaHalt
ID: 35027105
tigin44:  I tried it...it's even slower now, 35 sec to 65 seconds :(  Any ideas?
0
 

Author Comment

by:MariaHalt
ID: 35027185
Tried it again, it's back to 35 seconds...still no difference.
0
Fill in the form and get your FREE NFR key NOW!

Veeam® is happy to provide a FREE NFR server license to certified engineers, trainers, and bloggers.  It allows for the non‑production use of Veeam Agent for Microsoft Windows. This license is valid for five workstations and two servers.

 
LVL 40

Assisted Solution

by:lcohan
lcohan earned 1000 total points
ID: 35029268
If you created full text index as suggested above did you used full-text search syntax CONTAINS/CONTAINSTABLE or FREETEXT/FREETEXTTABLE ?

You say << When I leave it out of the OR clause, this executes super fast, with it in, it's soooo slow! >>
Did you tried maybe a UNION is fast enough without having to complicate things with SQL FULL-TEXT?

Something like:

SELECT * FROM tempdb.dbo.mh_stuff WHERE ( Title like @Kw )
UNION
SELECT * FROM tempdb.dbo.mh_stuff WHERE ( Name LIKE @Kw )
UNION
SELECT * FROM tempdb.dbo.mh_stuff WHERE ( CellText LIKE @Kw)
0
 

Author Comment

by:MariaHalt
ID: 35030020
Icochan, I also said I don't know how to use FullText, sounds like I'm half way there...what's Contains/ContainsTable?  
0
 

Author Comment

by:MariaHalt
ID: 35030267
Icohan.  Looked it up myself, cool, thanks, much better!  I'll split the points.
0
 

Author Closing Comment

by:MariaHalt
ID: 35030275
Needed to setup the FullText and then use the ContainsTable.
0

Featured Post

How to Use the Help Bell

Need to boost the visibility of your question for solutions? Use the Experts Exchange Help Bell to confirm priority levels and contact subject-matter experts for question attention.  Check out this how-to article for more information.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

SQL Server engine let you use a Windows account or a SQL Server account to connect to a SQL Server instance. This can be configured immediatly during the SQL Server installation or after in the Server Authentication section in the Server properties …
In this article we will get to know that how can we recover deleted data if it happens accidently. We really can recover deleted rows if we know the time when data is deleted by using the transaction log.
In this video, Percona Solution Engineer Rick Golba discuss how (and why) you implement high availability in a database environment. To discuss how Percona Consulting can help with your design and architecture needs for your database and infrastr…
In response to a need for security and privacy, and to continue fostering an environment members can turn to for support, solutions, and education, Experts Exchange has created anonymous question capabilities. This new feature is available to our Pr…

604 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question