code 128 checksum c# Search procedure using fragments_personlists in Visual C#.NET

Creation Code-128 in Visual C#.NET Search procedure using fragments_personlists

Listing 5 Search procedure using fragments_personlists
Creating Code 128B In C#
Using Barcode creation for .NET Control to generate, create USS Code 128 image in .NET applications.
www.OnBarcode.com
Decoding USS Code 128 In Visual C#
Using Barcode recognizer for Visual Studio .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
CREATE PROCEDURE list_search_four @wild varchar(80) AS DECLARE @list1 varbinary(MAX), @list2 varbinary(MAX) DECLARE @wildfrags TABLE (frag char(3) NOT NULL PRIMARY KEY) INSERT @wildfrags(frag) SELECT frag FROM wordfragments(@wild) ; WITH numbered_frags AS ( SELECT person_list, rowno = row_number() OVER(ORDER BY no_of_entries) FROM fragments_personlists WHERE fragment IN (SELECT frag FROM @wildfrags) ) SELECT @list1 = MIN(person_list), @list2 = MAX(person_list) FROM numbered_frags WHERE rowno <= 2 SELECT FROM WHERE AND person_id, first_name, last_name, birth_date, email persons p patindex('%' + @wild + '%', email) > 0 EXISTS (SELECT * FROM binlist_to_table_m2(@list1) b WHERE b.n = p.person_id) EXISTS (SELECT * FROM binlist_to_table_m2(@list2) b WHERE b.n = p.person_id)
USS Code 128 Drawer In C#
Using Barcode creator for .NET Control to generate, create Code128 image in .NET applications.
www.OnBarcode.com
Barcode Creator In C#.NET
Using Barcode generator for .NET framework Control to generate, create Barcode image in VS .NET applications.
www.OnBarcode.com
I d like to emphasize here that I used a multi-statement version of the binlist_to_table function. When I used the inline version, it took a minute to run the procedure for the string niska! The results for list_search_four with our test words follow:
Making 2D Barcode In Visual C#
Using Barcode maker for Visual Studio .NET Control to generate, create 2D image in .NET framework applications.
www.OnBarcode.com
Creating UPC-A In Visual C#
Using Barcode generator for Visual Studio .NET Control to generate, create UPC-A image in .NET framework applications.
www.OnBarcode.com
Disk Cache joy 203 16 aam 266 0 niska 6403 500 omamo@ 473 46
GS1 128 Creation In C#.NET
Using Barcode drawer for Visual Studio .NET Control to generate, create UCC - 12 image in .NET framework applications.
www.OnBarcode.com
Printing EAN - 14 In Visual C#
Using Barcode printer for Visual Studio .NET Control to generate, create ITF-14 image in VS .NET applications.
www.OnBarcode.com
Compared to the results for map_search_five, the performance is better in some cases, but worse in others.
Create USS Code 128 In Java
Using Barcode drawer for Android Control to generate, create ANSI/AIM Code 128 image in Android applications.
www.OnBarcode.com
Code 128A Maker In Objective-C
Using Barcode creator for iPad Control to generate, create Code 128A image in iPad applications.
www.OnBarcode.com
Fragments and lists
Painting Barcode In VS .NET
Using Barcode maker for VS .NET Control to generate, create Barcode image in Visual Studio .NET applications.
www.OnBarcode.com
DataMatrix Drawer In Java
Using Barcode generation for Android Control to generate, create Data Matrix image in Android applications.
www.OnBarcode.com
The file 09_list_search.sql contains the code for list_search_four, as well as five other list_search procedures. The first three illustrate my initial attempts, and they do not perform well. The last two are variations with more or less the same performance as list_search_four.
GS1 128 Drawer In Objective-C
Using Barcode generator for iPad Control to generate, create GS1-128 image in iPad applications.
www.OnBarcode.com
USS-128 Maker In .NET Framework
Using Barcode creation for ASP.NET Control to generate, create UCC.EAN - 128 image in ASP.NET applications.
www.OnBarcode.com
Keeping the lists updated
Reading Code 3/9 In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Code 3 Of 9 Maker In Java
Using Barcode drawer for Java Control to generate, create USS Code 39 image in Java applications.
www.OnBarcode.com
As in the case with fragments_persons, we need a trigger on the persons table to keep fragments_personlists up to date. Handling new persons is no problem; this is similar to the load procedure, and this is also true for new data in UPDATE statements. But how do we handle deletions, and the old data in UPDATE If a person is deleted, to keep the lists accurate, we should delete the person_id from all lists it appears in. As you can imagine, deleting a person with a .com address would be costly. Thankfully, there is a simple solution: don t do it. This table is only an index, and we use it only to locate rows that may match the user s search condition. The real search condition with LIKE or patindex must always be there. So although we will get some false positives, they will not affect the result of our queries. As the number of outdated mappings grows, performance will suffer. Thus, you will need to re-run the load procedure from time to time to get rid of obsolete references. But that is not really much different from defragmenting a regular SQL Server index. As a consequence the person_list column for a fragment could include duplicate entries of the same person_id. A simple example is when a user mistakenly changes the email address of a person, and then restores the original address hence, the need for DISTINCT in the binlist_to_table function. You can find the code for the trigger in the files 10_fragments_personlists_trigger2005.sql and 10_fragment_personlists_trigger-2008.sql. In the file 11_list_trigger_ test.sql there is a script for testing the trigger. I m not including the trigger code here in full, as it s similar to the load procedure. The trigger for SQL 2008 does not resort to batching, but in the trigger for SQL 2005 batching is unavoidable, due to the size restriction with the UDA. One thing is a little different from the load procedure, though: in case of UPDATEs we should not store fragment-person_id mappings that do not change. Listing 6 shows how this looks in the trigger for SQL 2005.
Making Barcode In VS .NET
Using Barcode creator for ASP.NET Control to generate, create Barcode image in ASP.NET applications.
www.OnBarcode.com
Decode PDF417 In Visual C#.NET
Using Barcode reader for .NET framework Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Listing 6 Filtering out unchanged fragment-person_id mappings
Decode ECC200 In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
Barcode Scanner In Visual C#
Using Barcode decoder for .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
; WITH fragmentpersons(fragment, person_id) AS ( SELECT w.frag, p.person_id FROM (SELECT person_id, email, rowno = row_number() OVER(ORDER BY person_id) FROM inserted) AS p CROSS APPLY wordfragments (p.email) AS w WHERE rowno >= @batchstart AND rowno < @batchstart + @batchsize EXCEPT SELECT w.frag, p.person_id FROM (SELECT person_id, email, rowno = row_number() OVER(ORDER BY person_id) FROM deleted) AS p
CROSS WHERE AND )
Copyright © OnBarcode.com . All rights reserved.