Are Text Pages Deleted When A Column Is Converted To Varchar
Jul 20, 2005
When I change a column from text to varchar using the
design view of a table within Enterprise Manager the
varchar value (less than 8000 characters) appears in the
column but does SQL Server automatically delete the text
values from their pages?
If not are they removed by routine reindex/defrag or
should I create a new table, import from the text as
varchar and drop the old table to make sure the pages
storing the original text version of the values are
deleted?
..
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Jul 11, 2007
Hi, I was wondering if any SQL Server gurus out there could help me...I have a table I'm trying to apply a full text catalog to, however no results are ever returned due to the text column being cataloged being of varbinary(max) that's being populated from a converted nvarchar(max) value - I've narrowed it down to this specifically, populating with non nvarchar text seems to work fine.To re-create the problem quickly...If I populate the column viaCONVERT(varbinary(max), 'test text')then there is no problem, I get results as expected.However if I populate the column viaCONVERT(varbinary(max), CAST('test text' as nvarchar(max)))no results are ever returned.Is this a bug with SQL Server 2005 Full Text Indexing? I'm happily creating full text catalogs when an nvarchar is not getting converted into a varbinary.I'm setting the Document Type column to '.html' (I've tried changing this to '.txt' in case it was a fault with the html ifilter but the problem persists so I believe I can rule this out).The reason I need to convert an nvarchar to varbinary is that the table holds multi-lingual text and I'm adding a html meta tag <META NAME="MS.LOCALE" CONTENT="ES"> to the beginning in order for the full text indexing word breaker to select the correct language to catalog the text with. The aim being to provide more relevant searches in users native languages (I've read a few articles that describe this technique, but it's the first time I've tried to apply it).Any pointers / suggestions would be greatly appreciated. Cheers,Gavin.
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Jul 11, 2007
Hi, I was wondering if any SQL Server gurus out there could help me...
I have a table I'm trying to apply a full text catalog to, however no results are ever returned due to the text column being cataloged being of varbinary(max) that's being populated from a converted nvarchar(max) value.
To re-create the problem quickly...
If I populate the column via
CONVERT(varbinary(max), 'test text')
then there is no problem, I get results as expected.
However if I populate the column via
CONVERT(varbinary(max), CAST('test text' as nvarchar(max)))
no results are ever returned.
Is this a bug with SQL Server 2005 Full Text Indexing? I'm happily creating full text catalogs when an nvarchar is not getting converted into a varbinary.
I'm setting the Document Type column to '.html' (I've tried changing this to '.txt' in case it was a fault with the html ifilter but the problem persists so I believe I can rule this out).
The reason I need to convert an nvarchar to varbinary is that the table holds multi-lingual text and I'm adding a html meta tag <META NAME="MS.LOCALE" CONTENT="ES"> to the beginning in order for the full text indexing word breaker to select the correct language to catalog the text with. The aim being to provide more relevant searches in users native languages (I've read a few articles that describe this technique, but it's the first time I've tried to apply it).
Any pointers / suggestions would be greatly appreciated. Cheers,
Gavin.
UPDATE: Below is a T-SQL script you can run to demonstrate the effect I'm experiencing...
Code Snippet
-- Create test database
CREATE DATABASE FullTextTest
GO
USE FullTextTest
GO
-- Create test data table
CREATE TABLE TestTable
(
pk UNIQUEIDENTIFIER NOT NULL CONSTRAINT tablePK PRIMARY KEY,
varbinarycol VARBINARY(MAX),
documentExtension VARCHAR(5),
)
GO
-- The below single entry WILL BE FOUND (the text source is being entered directly)
INSERT INTO TestTable (pk, varbinarycol, documentExtension) VALUES (NEWID(), CONVERT(VARBINARY(MAX),'<META NAME="MS.LOCALE" CONTENT="EN">test entry 1'), '.html')
-- The bellow two entries below WILL NOT BE FOUND (the text source is taken from an NVARCHAR(MAX) value)
INSERT INTO TestTable (pk, varbinarycol, documentExtension) VALUES (NEWID(), CONVERT(VARBINARY(MAX), CAST('<META NAME="MS.LOCALE" CONTENT="EN">test entry 2' AS NVARCHAR(MAX))), '.html')
INSERT INTO TestTable (pk, varbinarycol, documentExtension) VALUES (NEWID(), CONVERT(VARBINARY(MAX), CAST('<META NAME="MS.LOCALE" CONTENT="EN">test entry 3' AS NVARCHAR(MAX))), '.html')
GO
-- Create the full text catalog
sp_fulltext_database 'enable'
GO
CREATE FULLTEXT CATALOG TEST AS DEFAULT
GO
CREATE FULLTEXT INDEX ON TestTable (varbinarycol TYPE COLUMN documentExtension LANGUAGE 1033)
KEY INDEX tablePK
GO
-- NOTE: You might need to give the catalog a chance to build before running the script below.
-- Now do a search that SHOULD RETURN 3 ROWS of data, but ONLY 1 ROW IS RETURNED
SELECT CAST(varbinarycol AS NVARCHAR(MAX)) FROM TestTable WHERE CONTAINS(varbinarycol, 'test')
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Sep 25, 2007
Hi,
I am using SSRS to generate a 4 page statement... So i have a plan whose no. of Participants is 3271 rows... so While we try to export them to a PDF we will have around 13084 pages... but we cannot export so many pages at one time (it craps out). so right now we are breaking it up by start part and stop part and creating a pdf..
Is there a way that SSRS can handle so many pages at one go without any problems... if so how ??
Regards
Karen
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Apr 16, 2008
Hi every one,
I am facing problem in printing the reports from browser and also when i export it to pdf,the problem i am facing is blank pages are coming when report column getting the large amount of text around 2500 characters into column value.
can any one help me in this issue?. if the report is getting acceptable amout of data it is printing in proper way i.e no balnk pages at all.i maintained all properties like margins+body size < page size.
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Jan 30, 2015
create table tblxmldata
(id int, xmltext varchar(max))
insert into tblxmldata values(1,'<associatedText><value type="PO">GTT taken</value></associatedText>')
insert into tblxmldata values(1,'<associatedText><value type="PO">Check sugar today please</value></associatedText>')
I want the output as
GTT taken
Check sugar today
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May 9, 2014
One purchased app stored user's multiple lines input into a varchar column in which including char(13) and char(10).
My app need to select this value and format to multiple lines text in one text box.
How to code to output it?
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Aug 7, 2015
Impact on performance of changing Text column size.
However, many of them were regarding older releases of SQL Server.
Does the architecture in 2012, 2014 releases make this less of an issue ?
In other words, why bother going from Varchar(1000) to Varchar(50) ?
I'm just thinking maybe there is column compression automatically now.
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Jun 2, 2008
Cannot use dynamic sql in current context. So need some help regarding this.I am developing a stored procedure to update a table. Sending Column names as parameters, but not able to use them as given below.INSERT INTO Books (@Column1, @Column2) values.. Any way to execute without using dynamic sql?..Thanx.
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Nov 18, 2014
I need to extract specific text elements from a varchar column. There are three keywords in any given string: "wfTask," "wfStatus" and "displayReportFromWorkflow." "wfTask" and "wfStatus" can appear multiple times, but always as a pair and will each be followed by by "==" (with or without surrounding spaces). "displayReportFromWorkflow" is always followed by "(" and there can be spaces on either side. The text elements will be between a pair of double quotes, and following one of keywords. For each row, I need to return the task, status and report name.
declare @t table (rowID int, textValue varchar(1024))
insert @t
(rowID, textValue)
values
[Code] ....
Output:
rowID, Task, Status, ReportName
----- --------- ------- ------------------------
1, Issuance, Issued, General Permit
2, Issuance, Issued, Capacity Letter Type III
2, Review, Denied, Capacity Letter Type III
I started with a string splitter using the double quote character, referencing elements "i" and "i+1" where the text like '%wfTask%' or '%wfStatus%' or '%displayReportFromWorkflow%', but the case of multiple task/status in a row has confounded me so far.
Unfortunately, CLR is not an option.
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Aug 15, 2007
I am unable to get FTS working where the column to be searched is type varchar(MAX) or Text. I can get this to work if my column to be indexed is some statically assigned array size such as varchar(1000).
For instance this works, and will return all applicable results.
CREATE TABLE [dbo].[TestHtml](
[ID] [int] IDENTITY(1,1) NOT NULL,
[PageText] [varchar](1000) NOT NULL,
CONSTRAINT [PK_TestHtml] PRIMARY KEY CLUSTERED
SELECT * FROM TestHTML WHERE Contains(PageText, @searchterm);
And this does not. It returns zero results what so ever.
CREATE TABLE [dbo].[TestHtml](
[ID] [int] IDENTITY(1,1) NOT NULL,
[PageText] [varchar](MAX) NOT NULL,
CONSTRAINT [PK_TestHtml] PRIMARY KEY CLUSTERED
SELECT * FROM TestHTML WHERE Contains(PageText, @searchterm);
Could someone please tell me what I need to do to enable FTS on varchar(MAX) or Text columns?
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Feb 14, 2008
Working on partitioning a few large tables. One of the tables included a text column and the TEXTIMAGE_ON [PRIMARY]? clause which would prevent the partitioning of this table. After some research we found that the data was legacy and no longer used. We updated the column on the affected rows to NULLS and altered the column to a VARCHAR(20)
When I attempted to run the ALTER TABLE SWITCH I encountered the error
Msg 4947, Level 16, State 1, Line 1
ALTER TABLE SWITCH statement failed. There is no identical index in source table 'LocalDeltanet.dbo.testresultsjoe' for the index 'PKIDX_testSummary' in target table 'LocalDeltanet.dbo.testresults_part'.
After a lot of grief and testing I determined that the message was bogus and the real issue is that the 'sys.tables' still has lob_data_space_id? with a value of 1 for this table.
I created a copy of the table with the text column altered to varchar and one with just the varchar to begin with. After copying data from the original table, I tried to run the alter switch. It failed once again for the text column altered to varchar table, but it worked for the varchar from the start.
Since it appears that this value is causing my issues, is there anyway to update the table in place. I know I can BCP the data out, but that would take too long and would defeat the advantage of using the alter switch method.
BOL States:
The allow updates option is still present in the sp_configure stored procedure, although its functionality is unavailable in Microsoft SQL Server 2005 (the setting has no effect). In SQL Server 2005, direct updates to the system tables are not supported. This means we cannot update the table manually.
Thanks
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Dec 11, 2007
Hi all,
I'm having an issue with data from an OLE DB source being converted from numeric [DT_R8] to text when I export it to Excel. I had the column in the spreadsheet formatted as Numeric, but when I set it up as the data destination, it is showing in SSIS as [DT_WSTR].
The SSIS job runs OK, it just converts my numeric data to text in the spreadsheet. I'm surprised that the job actually runs, since I have to do explicit data conversions for my OLE DB string data in order to convert it to unicode. From what I have read elsewhere, the decision was made in SSIS not to use implicit data conversion, but to require explicit conversion. Yet this export is converting my numeric data to text.
I would appreciate any information on how to set up the Excel Destination to properly handle numeric information.
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Nov 20, 2007
I have looked far and wide and have not found anything that works to allow me to resolve this issue.
I am moving data from DB2 using the MS OLEDB Provider for DB2. The OLEDB source sees the column of data as DT_TEXT. I setup a destination to SQL Server 2005 and everything looks good until I try and run the package.
I get the error:
[OLE DB Source [277]] Error: An OLE DB error has occurred. Error code: 0x80040E21. An OLE DB record is available. Source: "Microsoft DB2 OLE DB Provider" Hresult: 0x80040E21 Description: "Multiple-step OLE DB operation generated errors. Check each OLE DB status value, if available. No work was done.".
[OLE DB Source [277]] Error: Failed to retrieve long data for column "LIST_DATA_RCVD".
[OLE DB Source [277]] Error: There was an error with output column "LIST_DATA_RCVD" (324) on output "OLE DB Source Output" (287). The column status returned was: "DBSTATUS_UNAVAILABLE".
[OLE DB Source [277]] Error: The "output column "LIST_DATA_RCVD" (324)" failed because error code 0xC0209071 occurred, and the error row disposition on "output column "LIST_DATA_RCVD" (324)" specifies failure on error. An error occurred on the specified object of the specified component.
[DTS.Pipeline] Error: The PrimeOutput method on component "OLE DB Source" (277) returned error code 0xC0209029. The component returned a failure code when the pipeline engine called PrimeOutput(). The meaning of the failure code is defined by the component, but the error is fatal and the pipeline stopped executing.
Any suggestions on how I can get the large string data in the varchar column in DB2 into the varchar(max) column in SQL Server 2005?
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Mar 30, 2008
Hi - I am trying to add paging to my stored procedure. The stored procedure successfully executes a full-text search. Unfortunately, the paging routine below the full-text search operates on the articles table after the search has been conducted. This means that it utilizes the row numbers from the entire table rather than the row numbers from the result set. I somehow need to the paging routine starting at "WITH tempArticles AS" to operate on the search results rather than the articles table. I am too new to SQL and can't figure out how to populate a temporary table storing text search results to use in this paging routine. Can anyone help me with this? Thanks! Peter dbo.Search_Articles @searchText varchar(150), @PageSize int, @PageNumber int AS Declare @RowStart int Declare @RowEnd int if @PageNumber > 0 Begin SET @PageNumber = @PageNumber -1; SET @RowStart = @PageSize * @PageNumber + 1; SET @RowEnd = @RowStart + @PageSize - 1 ; CREATE TABLE #results (ArticleID int) INSERT INTO #results SELECT ArticleID FROM articles WHERE CONTAINS(Description, @searchText) OR CONTAINS(Title, @searchText) UNION SELECT ArticleID FROM article_pages WHERE CONTAINS(Text, @searchText) /*this returns all matching records from the text search*/ SELECT * FROM articles, #results WHERE #results.ArticleID=articles.ArticleID; WITH tempArticles AS ( SELECT Title, PostDate, UserID, City, Country, Tags, StoryID, Approved, ROW_NUMBER() OVER (order by PostDate) as RowNumber FROM articles WHERE Approved = 1) SELECT * FROM tempArticles WHERE RowNumber >= @RowStart and RowNumber <= @RowEnd; END
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Jun 10, 2006
Hi,
I just designed a website using asp.net 2.0, now my customer hopes I can add Search website feature, he expected that it can search both static text in aspx and dynamic content in SQL Server. The problem is : I don't know how to compose the result URL to the user. Suppose I have a table called "Table1", webform1.aspx and webform2.aspx will retrieve data from this table, and the query string of these two pages are different. After searching the table, I expected that there will be two matching records, the first one is linked to "webpage1.aspx?ID1=xxx" and the second one is linked to "webpage2.aspx?ID2=xxx". Must I hard code the result page for each searchable table? Any other solutions?
Thanks,
Ziff
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Jan 22, 2008
I have followed many tutorials on selecting and replacing text in text fields, varchar fields and char fields, but I have yet to find a single script that will to all 3 based on field type. Let's assume for a moment that I don't know where all in my database a certain value that I need changed resides ... i.e., the data's tablename and fieldname. How would I go about doing the following ... or more importantly, is this even possible in a SQL only procedure?1) Loop over entire database and get all user tables2) Loop over all user tables and get all fields3) Loop over all fields and determine the field type4) switch between field types and change a string of text from 'a' to 'b'Please be gentle, I'm a procedure newb.
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Feb 12, 2003
Hi,
I need to prevent modification/update to a field.
So I created a trigger. To take the data from DELETED table then replace the field data.
However, I have problem with one field which data type is text.
MS SQL always return me this error:
Cannot use text, ntext, or image columns in the 'inserted' and 'deleted' tables.
I use the following code to take the data from deleted table
DECLARE @ptrval varbinary(16)
SELECT @ptrval = TEXTPTR(NOTES )
FROM DELETED
I also tried simple Select statement
Select notes from deleted
What code should I use to take the deleted data
Please help.
Thanks in advance
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Oct 6, 2004
Hi folks,
Table:
a int,
b int,
c int,
d text
I need to change my AFTER - Trigger from this (example!):
select * into #ins from inserted
to something like
select *(without Text / nText / image -columns) into #ins from inserted.
So I tried to build a string like this: (using INFORMATIONSCHEMES)
select @sql = 'select a,b,c into #ins from inserted'
exec(@sql)
a,b,c are not of Text, nText or Image datatype.
After executing the trigger, I get an error, that inserted is unknown.
Does anyone know how to solve this ?
Thx.
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Oct 2, 2014
in microsoft doc there is written on the topic of BP Extensions with SSD's in SQL Server 2014: only clean pages are written to disk... does this mean data pages that have not been modified yet? or also those data pages that have already been modified, and where log has finished writing and the transaction has been marked as commited??
why are there clean data pages being written to L2 cache to make space for other not modified pages? I mean, shoudnt they be modified first, before letting other unmodified data pages into the Cache? I mean they have still to be modified..that makes no sense to me to page them out and page them in again just for other data pages...
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Aug 24, 2015
PHP Code:
INSERT INTO [GPO].dbo.tblMetric (KPI_ID, METRIC_ID, GOAL, REPORTING_MONTH, ACTUALS)
SELECT
1 AS KPI_OWNER_ID
, 23 AS METRIC_ID
, .75 AS GOAL
, CAST(Z.REPORTING_MONTH as DATE) AS REPORTING_MONTH
, SUM(CAST(FTP_COUNT AS DECIMAL))/SUM(CAST(FULL_COUNT AS DECIMAL)) AS ACTUALS
[Code] ....
The insert column I am trying to get into is a date type. The original state of the field is YYYYMM varchar. How to get this into the table.
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Oct 21, 2013
Aim – Convert the following field ”[INSTALLATION_DATE]” date format from “20090709” Into this “2009-07-09” ,
Also create a new column called “BegMonth” which selects first day of the given month of the converted date column
The table is ;
SELECT
[FDMSAccountNo],
[INSTALLATION_DATE]
FROM [FDMS].[dbo].[stg_LMPAB501]
Results
FDMSAccountNoINSTALLATION_DATE
87800000088420030521
Required Results
FDMSAccountNoINSTALLATION_DATEBegMonth
8780000008842003-05-212003-05-01
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Jul 5, 2007
If a single row of data spans a page then the column header is not repeated until the next row on the next page.
Is there a way to overcome this?
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Aug 14, 2007
I have a table with a column of varchar(4000) and another table with 2 columns that are varchar(2000)
Is it better to make these columns text columns?
The 2 varchar(2000) columns do not need to be searched, but many of the other columns in that table do need to be searched.
The varchar(4000) column has a full text index on it.
Any help would be appreciated
Thank you
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Sep 15, 2005
Hi ,
I have a website where we review cds ... the users write their own reviews ...
But when the reviews are displayed on screen all the breaks are gone and all the text comes in one block .
Can anyone advise on what to do ?
I tried to change from varchar to text but it didn't change anything.
Thanks for the help
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Dec 10, 2006
Hello, I have read that microsoft is getting rid of the text datatype and replacing it with varchar. The maximum that varchar can hold is 8000 bytes. Is there a way to get above 8000 bytes without using text?
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Jul 23, 2005
Hi,What is the maximum character a text type column can contain ? Can'tchange the length to upper than 16....What is the bigger ? Varchar(8000) or Text ?Regards
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Oct 23, 2007
Hi All In My application when i want to work with sqldatasource for updation and delteion tasks it is working properly when all the columns consists the data. If any of the column consists the null values its not updating and deleting. Advices are needed.Thank uBaba
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Mar 18, 2004
Hi all
iam trying to but a varchar variable into a TEXT var but i get this error "The assignment operator operation cannot take a text data type as an argument"
anybody know what shall i do
best regards
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Jan 10, 2002
hi everyone a question for all you wise men out there! ;-)
i run a db with thousands of reviews, interviews, article and so on. What's better: 1) leaving all the articles on .txt files and then using the file system object to show them in the page; 2) insert the articles in the db splitting them in several varchar fields 3) insert the articles in the db using the text/blob fields
thanx, it's a very hard question for me!
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Jun 25, 2001
is it smarter to use the text field type or to use a varchar field type with a length of 100-150? please give me a detailed answer. thanx
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Dec 11, 2007
Hello Guys.
Here is my issue i have email addresses in a column of a table in sql server. Are addreses has changed since and i need to do a mass update of these email addreses i need to replace a few char to reflect this change like ex:
AAAAA@BBB.CCC.Com i need to replace the BBB. part with nothing so that it looks like this AAAAA@CCC.Com.
Please help.
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Oct 22, 2007
hi,
i would like to convert text string(field) to varchar so I can use later group by a special string.
what shall i use?
thank you
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