Microsoft KB Archive/152620

= BUG: Inserting to a 255-byte String w/ Embedded Quote =

Article ID: 152620

Article Last Modified on 11/14/2003

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APPLIES TO


 * Microsoft SQL Server 4.21a Standard Edition
 * Microsoft SQL Server 6.0 Standard Edition
 * Microsoft SQL Server 6.5 Standard Edition

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This article was previously published under Q152620



BUG# WINDOWS 15473 (4.21a, 6.00, 6.50) (sqlserver)



SYMPTOMS
When inserting into a char or varchar column and the embedded quote sequence (for example, two double quotation marks [""], or two single quotation marks['']) causes the string literal to exceed 255 bytes in length, SQL Server returns the following error message:

Msg 260, Level 16, State 1

Disallowed implicit conversion from datatype 'text' to datatype 'char'

Table: 'pubs.dbo.tblQuotes', Column: 'strData'

Use the CONVERT function to run this query.



CAUSE
SQL Server is checking the length of the string before resolving the multiple quote sequences. If the server resolved the ("") or ('') sequences before checking the length, the implicit conversion would not fail.



WORKAROUND
Use the CONVERT function to explicitly convert the value.

Here is an example of how to correct the first insert that fails:

use pubs go

drop table tblQuotes go

create table tblQuotes (  strData     char(255) ) go

insert into tblQuotes values("""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """"""""""""""""""""""""""""""""""""""""""""""""""""""""""" """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""") go insert into tblQuotes values(CONVERT(VARCHAR(255),""""""""""""""""""""""""""""""""""""""""""""""" """""""""""""""""""""""""""""""""""""""""""""""" """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """""""""""""""""""""""""")) go

select datalength(strData), strData from tblQuotes go



STATUS
Microsoft has confirmed this to be a problem in Microsoft SQL Server version 4.21a, 6.00, and 6.50. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

Keywords: kbbug KB152620

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