Mailing List
Home
Forum Home
MySQL General - General MySQL discussion
MaxDB - Everything about MaxDB, formerly known as SAP DB
MySQL++ - Programming with the C++ API to MySQL
ODBC - ODBC with the MySQL Connector/ODBC driver
MySQL on Win32 - Runing MySQL on Windows 9x/Me/NT/2000/XP
Java Help - Mostly related to the MySQL Connector/J driver
Perl - Perl support for MySQL with DBI and DBD::mysql
GUI - MySQL GUI Tools
Announcement
Subjects
• mysql openssl Question
• mysql:it 's a db not a dbms how it 's possible?!
• Does the binary log enabling affect the MySQL performances?
• Strange behavior, Table Level Permission
• FULLTEXT query format question
• Preventing Duplicate Entries
• Comparing and writing out BLOBS
• Executing MySQL Commands From Within C Program
• Can 't access mysql after kernel upgrade
• Mysql 4 0 Oracle Stored Procedure Trigger Conversion
• Downgrade Mysql from 4 to 3 23
• MySQL Cluster Software
• mysql test 4 1 fails with the gis test
• ERROR 2002: Can 't connect to local MySQL server through socket
• Getting Identity after INSERT
• Update one field with more fields from another table
• ERROR 1045: Access denied for user: 'root@localhost ' (Using
password: NO)
• mysql have same function mthod as Oracle decode()
 
Problem with update.

Problem with update.

2006-04-24       - By p_romm

 Back
Hi,

I had a problems with updating rowset.
I use odbc driver ver. 3.51.12 on WinXp and I couldn't update any row.

I set statment:
SQLSetStmtAttr(hstmt,SQL_ATTR_CURSOR_SCROLLABLE,(SQLPOINTER)SQL_SCROLLABLE,0);
SQLSetStmtAttr(hstmt,SQL_ATTR_CURSOR_TYPE,(SQLPOINTER)SQL_CURSOR_DYNAMIC,0);
SQLSetStmtAttr(hstmt,SQL_ATTR_CONCURRENCY,(SQLPOINTER)SQL_CONCUR_LOCK,0);

I bind col:
SQLBindCol(hstmt,1,SQL_C_SLONG,&ret,0,&cb);

I fetch row:
SQLFetchScroll(hstmt, SQL_FETCH_NEXT, 0);

I change ret value
and I try update row:
SQLSetPos(hstmt,1,SQL_UPDATE,SQL_LOCK_NO_CHANGE);

And then I get exception:
"Unhandled exception at 0x1004c170 in odbc_test.exe: 0xC0000005: Access
violation reading location 0x00000000."

When I change SQL_LOCK_NO_CHANGE to SQL_LOCK_EXCLUSIVE
I get odbc error:
"[MySQL][ODBC 3.51 Driver][mysqld-5 (See http://qld-5.ora-code.com).0.18-max]Invalid cursor position"
code: "HY109"

When I use MS SQL Server and it's driver everthing works. The same code, table
and data.


I found that the problem was with binding columns. My sql query took all
columns from the table and i only bind one column. Is any way to take columns
and bind not all ?

Thanks for comments.
Roman