BUG: Inserting to a 255-byte String w/ Embedded Quote (152620)
The information in this article applies to:
- Microsoft SQL Server 4.2x
- Microsoft SQL Server 6.0
- Microsoft SQL Server 6.5
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.
| Modification Type: | Major | Last Reviewed: | 11/14/2003 |
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| Keywords: | kbBug KB152620 |
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