Query based inserting or updating of blob

26-May-2017 20:49

The location can also be written in Services/Properties/Path to executable like this: C:\mysqlxxx\bin\mysqld-max-nt --defaults-file=C:\mysqlxxx\bin\My SQL5.0 Inside file there's section # The My SQL server [mysqld] and in it there should be: max_allowed_packet = XXM If not, add it. Execute("USE test") ' querying data str SQL = "" str SQL = str SQL & "SELECT * " str SQL = str SQL & "FROM tst" Dim rs As ADODB. Traced it through VB and eventually found a problem - although I was specifying ad Open Dynaset, it always opened a static set. Open str Sql, g_conn, ad Open Dynamic, ad Lock Optimistic Value Description 1 The client can't handle that My ODBC returns the real width of a column. To clarify, it is only happening on SS side cursors. Here is a simple VB6 function to reproduce the problem. There is also an ADO "Update Criteria" option that, if set to ad Criteria Key, should cause a correct WHERE clause to be generated. NET does not have an 'Update Criteria' property, but users of ADO. have specified (one/many) fieldnames in SQL instead of *, as suggested. Explicit connection object not necessary, having used recordset alone for all other queries and updates to date. 6) The following code (typed from memory as I now use a work-around) works for Access (with Access Driver and appropriate cursor/locktype, of course), but not My SQL. Close Set r=Nothing Has anyone gotten a VBScript version of the suggested forum work around(s) to function properly?

The rowset properties DBPROP_OTHERINSERT and DBPROP_CANHOLDROWS cannot be used together.

You can add a linked server through the wizard or through the sp_addlinkedserver stored proc As you can see that was pretty standard INSERT an insert statement is a little odd looking because you still have the select in the openquery but the values that you want to insert look like a select statement that come after the openquery.

It looks like this Server: Msg 7320, Level 16, State 2, Line 1 Could not execute query against OLE DB provider ‘SQLOLEDB’.

PHP PDO provides a convenient way to work with BLOB data using the streams and prepare statements.

Description: I'm using My SQL 4.1.11 and My ODBC 3.51.12 and coding in ASP (javascript) with ADO. Also, I successfully updated BLOB fields using direct SQL queries of the form: UPDATE tst SET File=x'...' (using a string of hex digits). Adrian, so far I was unable to get updateable recordset with any combination of Cursor Location and Cursor Type no matter if there's blob field in the table or not. You can use the code that I posted before; as I said, if I change the query to: rst. 16 Don't prompt for questions even if driver would like to prompt. I spent a good 3 hours checking that everything was OK with my table, that I had the primary keys right etc etc.

How to repeat: Create a table with a record: CREATE TABLE `tst` ( `ID` int(11) NOT NULL auto_increment, `Name` varchar(50) default NULL, `File` mediumblob, PRIMARY KEY (`ID`) ) ENGINE=Inno DB DEFAULT CHARSET=utf8; INSERT INTO `tst` VALUES (1, 'blah', NULL); And run this code: The result is: Microsoft OLE DB Provider for ODBC Drivers error '80004005' Query-based update failed because the row to update could not be found. Suggested fix: Obviously, the recordset update functionality is seriously BORKED. The right fix is to allow updates for any kind of fields (for which an update is supposed to work), including blobs, binaries, etc. Using pure ODBC calls does not reproduce this problem. Net 2003, and I don't really know how to use ADO from C . However, for My ODBC 5 it's "Verified" (doesn't work at all). The only relevant post I've found is Loading 26MB text data from database consume JVM heap of 258MB or posts related to Postgre.Is there anything I can fix about my code or is it a some weird quirk that I need to know? Is there any way to insert a large value in a mysql DB without changing max_allowed_packet?My SQL provides a BLOB type that can hold a large amount of data. The maximum value of a BLOB object is specified by the available memory and the communication package size.You can change the communication package size by using the method, we close the connection.

How to repeat: Create a table with a record: CREATE TABLE `tst` ( `ID` int(11) NOT NULL auto_increment, `Name` varchar(50) default NULL, `File` mediumblob, PRIMARY KEY (`ID`) ) ENGINE=Inno DB DEFAULT CHARSET=utf8; INSERT INTO `tst` VALUES (1, 'blah', NULL); And run this code: The result is: Microsoft OLE DB Provider for ODBC Drivers error '80004005' Query-based update failed because the row to update could not be found. Suggested fix: Obviously, the recordset update functionality is seriously BORKED. The right fix is to allow updates for any kind of fields (for which an update is supposed to work), including blobs, binaries, etc. Using pure ODBC calls does not reproduce this problem. Net 2003, and I don't really know how to use ADO from C . However, for My ODBC 5 it's "Verified" (doesn't work at all). The only relevant post I've found is Loading 26MB text data from database consume JVM heap of 258MB or posts related to Postgre.Is there anything I can fix about my code or is it a some weird quirk that I need to know? Is there any way to insert a large value in a mysql DB without changing max_allowed_packet?My SQL provides a BLOB type that can hold a large amount of data. The maximum value of a BLOB object is specified by the available memory and the communication package size.You can change the communication package size by using the method, we close the connection.Inside you will find reference materials, interesting technical discussions, and expert tips and commentary.