TEXTVALID (Transact-SQL)
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TEXTVALID (Transact-SQL)

 

THIS TOPIC APPLIES TO:yesSQL Server (starting with 2008)noAzure SQL DatabasenoAzure SQL Data Warehouse noParallel Data Warehouse

A text, ntext, or image function that checks whether a specific text pointer is valid.

System_CAPS_ICON_important.jpg Important


This feature will be removed in a future version of Microsoft SQL Server. Avoid using this feature in new development work, and plan to modify applications that currently use this feature. Alternative functionality is not available.

Topic link icon Transact-SQL Syntax Conventions

  
TEXTVALID ( 'table.column' ,text_ ptr )  

table
Is the name of the table that will be used.

column
Is the name of the column that will be used.

text_ptr
Is the text pointer to be checked.

int

Returns 1 if the pointer is valid and 0 if the pointer is not valid. Note that the identifier for the text column must include the table name. You cannot use UPDATETEXT, WRITETEXT, or READTEXT without a valid text pointer.

The following functions and statements are also useful when you work with text, ntext, and image data.

Function or statementDescription
PATINDEX('%pattern%', expression)Returns the character position of a specified character string in text and ntext columns.
DATALENGTH(expression)Returns the length of data in text, ntext, and image columns.
SET TEXTSIZEReturns the limit, in bytes, of the text, ntext, or image data to be returned with a SELECT statement.

The following example reports whether a valid text pointer exists for each value in the logo column of the pub_info table.

System_CAPS_ICON_note.jpg Note


To run this example, you must install the pubs database.

USE pubs;  
GO  
SELECT pub_id, 'Valid (if 1) Text data'   
   = TEXTVALID ('pub_info.logo', TEXTPTR(logo))   
FROM pub_info  
ORDER BY pub_id;  
GO  

Here is the result set.

pub_id Valid (if 1) Text data   
------ ----------------------   
0736   1                        
0877   1                        
1389   1                        
1622   1                        
1756   1                        
9901   1                        
9952   1                        
9999   1                        
  
(8 row(s) affected)  

DATALENGTH (Transact-SQL)
PATINDEX (Transact-SQL)
SET TEXTSIZE (Transact-SQL)
Text and Image Functions (Transact-SQL)
TEXTPTR (Transact-SQL)

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