DBActivateSQL

Similar Questions

• CVI sql toolkit

  Hello

  We use the CVI 2012 and the last sql toolkit. We want to find and update the data in a mysql database. But we have the problem that we still get an error message.

  Here's our code:

  // -----------------------------------------------------------------------

  initialisiert das SQL Toolkit
  DBInit (DB_INIT_MULTITHREADED);
  DBInit (DB_INIT_SINGLETHREADED);

  //
  sprintf (String, "DSN = SYSTEM_DATABASE; Server = 127.0.0.1; Basis of data = backup_demo8; UID = root; PWD = admin");

  //
  hdbc = DBConnect (String);

  //
  HMAP = DBBeginMap (hdbc);

  //
  RW = DBMapColumnToInt (hmap, 'speed', iSpeed, & iSpeedState);
  RW = DBMapColumnToChar (hmap, "datetime", 32, cDateTime, & cDateTimeStat, "");

  Activate the map
  HSTMT = DBActivateMap (hmap "plots");

  Find the folder that we want to update
  While ((rw = DBFetchNext (hstmt)) == DB_SUCCESS)
  {
  //
  If (StrICmpWithoutSurrWhiteSpace (cDateTime, ' 05:37 "" ") == 0)
  break;
  }

  //
  iSpeed = 10;

  Insert the record into the database
  RW = DBPutRecord (hstmt);

  //
  RW = DBDeactivateMap (hmap);

  //
  RW = DBDisconnect (hdbc);

  // -----------------------------------------------------------------------

  When we call the cmd DBPutRecord we get the attached error message

  Can someone help us?

  Thanks in advance

  Best regards

  Oliver

  Hello

  I found a solution in the meantime:

  The Board features seem to be the problem. A google search I found a few comments about similar problems.

  Using the SQL functions activate 'normal', it runs.

  Here is my solution:

  // -----------------------------------------------------------------------

  initialisiert das SQL Toolkit
  DBInit (DB_INIT_MULTITHREADED);
  DBInit (DB_INIT_SINGLETHREADED);

  //
  sprintf (String, "DSN = SYSTEM_DATABASE; Server = 127.0.0.1; Basis of data = database_l01; UID = root; PWD = admin");

  //
  hdbc = DBConnect (String);

  //
  HSQL = DBActivateSQL (hdbc, "' SELECT * FROM 'data_l01'" ");

  //
  RW = DBBindColChar (hsql, SQL_TIME, 32, cTime, & cTimeStat, "");
  RW = DBBindColInt (hsql, SQL_SPEED, iSpeed, & iSpeedState);

  Find the folder that we want to update
  While ((rw = DBFetchNext (hsql)) == DB_SUCCESS)
  {
  //
  If (StrICmpWithoutSurrWhiteSpace (cTime, ' 05:34 "" ") == 0)
  break;
  }

  //
  iSpeed = 15;

  Insert the record into the database
  RW = DBPutRecord (hsql);

  //
  RW = DBDeactivateSQL (hsql);

  //
  RW = DBDisconnect (hdbc);

  // -----------------------------------------------------------------------

  Thank you and Bravo to me :-D

  Oliver

• SQL Toolkit crashing with multiple threads

  Hello everyone and happy new year!

  I was hoping someone might be able to shed some light on this problem. I update an older application to use multiple threads. In fact, the thread that is causing a problem now is created by using an asynchronous timer.

  I use CVI 2010, and I think the SQL Toolbox is version 2.2.

  If I execute a SQL statement from the main thread, there is no problem.

  stat = DBInit (DB_INIT_MULTITHREADED);
  
  hdbc = DBConnect( "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=sample.mdb;Mode=ReadWrite|Share Deny None" );
  hstmt = DBActivateSQL( hdbc, "SELECT * FROM SAMPLES" );
  
  DBDeactivateSQL(hstmt);
  DBDisconnect(hdbc);
  

  If I add code to perform the same duties in a reminder of the timer, it causes a stack overflow error.

  .. Start the main thread

  stat = DBInit (DB_INIT_MULTITHREADED);
  
  NewAsyncTimer (5.0, -1, 1, &gfn_quicktest, 0);
  

  .. end of main thread

  .. and then the reminder of the timer

  int CVICALLBACK gfn_quicktest (int reserved, int timerId, int event,  void *callbackData, int eventData1, int eventData2)
  {
    {
      int hdbc = DBConnect( "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=params\\sample.mdb;Mode=ReadWrite|Share Deny None" );
      int hstmt = DBActivateSQL( hdbc, "SELECT * FROM SAMPLES" );
  
     DBDeactivateSQL(hstmt);
      DBDisconnect(hdbc);
    }
  
    return 0;
  }
  

  The program crashes with a stack overflow error when the DBActivateSQL statement is called.

  I understand that the Access ODBC driver can not support multithreaded, but I only connect to this base starting from the same thread with these 2 statements only so it should be good?

  Any idea would be appreciated,
  Thank you
  Ed.

  I just tried this using the sample provided with CVI access database. It uses a DSN instead of mdb. It has worked out well. I see that no reason multithreading would be a problem here, if you open and close the connection in the same segment of code. I see that you use params in the asynchronous callback connection string. Where did this come from? Maybe try to use the database and see if it works.

• DATEVAL

  Having a problem using SQL ToolKIT in CVI.

  DBActivateSQL DateValue('2010/12/21 15:36:58') in CVI, the return value is "21"), while in the MS ACCESS query, I get the full Date ' 2010/12/21 ' which is correct. What command SQL should I use to get the full value of Date in CVI SQL ToolKIT.

  Thank you.

  Correct me if I'm wrong, but it seems you are trying to do to this exact call: DBActivateSQL (hdbc, "DateValue ('2010 / / 12 / / 21 15:36:58 ')"); without using the dates actually stored in the database, is that correct? DateValue is a feature that only works with the Access databases (it seems that you are using). I don't know why it wouldn't work in CVI because this command should only be sent to the database to manage.

  If the dates are actually stored in a table, then is what you want to do something like this:

  HSTMT = DBActivateSQL (hdbc, "SELECT timestamp OF measure");

  DBBindColChar (hstmt, 1, bufLen, buf, & status, "dd/mm/yyyy");

  While (DBFetchNext (hstmt) == 0)

  ....

  DBDeactivateSQL (hstmt);

  If this is not what you want or need to do perhaps a little more information or a copy of your exact code would help us understand something.

• How can I transfer content from an XML file in a MS SQL database of the stored procedure using LabWindows/CVI SQL Toolkit?

  Hello

  I have a problem to transfer content to an XML file in a MS SQL database through a stored procedure data/fixed. I am able to transfer the content of the file using method...

  HSTMT = DBPrepareSQL (hdbc, EXEC usp_InsertReport " ... ");

  resCode = DBExecutePreparedSQL (hstmt);

  resCode = DBClosePreparedSQL (hstmt);

  ... but in this case, I am not able to read the return value of the stored procedure.

  I tried to follow the example of the stored procedure in the help documentation (DBPrepareSQL), but I miss a xml data type?

  No idea how to solve my problem?

  Cake of KR

  DianaS salvation,

  Thanks for your comments. During this time I found another way which fullfill my needs:

  resCode = DBSetAttributeDefault (hdbc, ATTR_DB_COMMAND_TYPE, DB_COMMAND_TEXT);

  sprintf (sz_SqlStatement, "DECLARE @TESTID INT EXEC @TESTID = usp_InsertReport ' SELECT 'RetVal' %s = @TESTID", sz_Buffer ");
  HSTMT = DBActivateSQL (hdbc, sz_SqlStatement);

  While ((resCode = DBFetchNext (hstmt)) == DB_SUCCESS)

  {

  / * Enter values in the record. */

  resCode = DBGetColInt (hstmt, 1, & s32_TestId);
  }

  resCode = DBDeactivateSQL (hstmt);

  sz_Buffer is the content of the XML file.

  Cake of KR

• problem of memory sql toolkit

  Hello

  We use CVI 2012 and SQL Toolkit 2.2. Once a minute, we're looking a record for a special SQL database and we update the data in this leaflet. After update, let's close the database. Whenever we do this procedure that we see in the Task Manager which increases the memory needs of our program.

  After a few minutes (20-30) we get an error message memory.

  Anyone know if there is a problem to know or can someone help us?

  Thanks in advance

  Oliver

  Here is a part of the code:

  //
  hdbc = DBConnect (DATABASE_STRING);

  //
  HSQL = DBActivateSQL (hdbc, "' SELECT * FROM 'data_l01'" ");

  //
  RW = DBBindColChar (hsql, SQL_DATE, 32, cDB_Date, & iDB_Date_State, "");
  RW = DBBindColChar (hsql, SQL_TIME, 32, cDB_Time, & iDB_Time_State, "");
  RW = DBBindColInt (hsql, SQL_SPEED, & iDB_Clock, & iDB_Clock_State);

  Flag, ob der entry found wurde loeschen
  iFoundFlag = 0;

  Find the folder that we want to update
  While ((rw = DBFetchNext (hsql)) == DB_SUCCESS)
  {
  //
  If ((StrICmpWithoutSurrWhiteSpace (cDB_Date, cDate) == 0) &)
  (StrICmpWithoutSurrWhiteSpace (cDB_Time, cTime) == 0))
  {
  Flag, ob der entry found wurde set
  iFoundFlag = 1;
  break;
  }
  } / / Ende von find the folder that we want to update

  Daten uebernehmen
  iDB_Clock = Mutec;

  Insert the record into the database
  RW = DBPutRecord (hsql);

  //
  RW = DBDeactivateSQL (hsql);

  //
  RW = DBDisconnect (hdbc);

  Hi Oliver,.

  To read your code, I understand that you open a connection to the database for each update that you want to run.

  Usually I would advice you to open the database connection to the start once this reference until the program is closed instead of open every time.

  This could potentially solve your problem.

  Please let me know if that solves your problem.

  Best regards

  Raphael

• Problem with a variable in the SQL statement variable

  Hello

  I try the following query.

  HSTMT = DBActivateSQL (hdbc, "UserLevel SELECT FROM ClassUsers WHERE Password =" + string + "");

  At this point, I get this error:

  Operands of + have illegal types "pointer to char" and "pointer to char".

  I tried this:

  HSTMT = DBActivateSQL (hdbc, "UserLevel SELECT FROM ClassUsers WHERE Password =" + & cadena + "");

  HSTMT = DBActivateSQL (hdbc, "UserLevel SELECT FROM ClassUsers WHERE Password = '" + string + "'");

  Still having the same problem.

  It works fine if I do this.

  HSTMT = DBActivateSQL (hdbc, "SELECT UserLevel UserClass WHERE the password =" cadena' "");

  Where "cadena" is treated as a string.

  Any ideas?

  Thank you!

  The Visual Basic method to concatenate strings with the + operator does not work in C. You can use a number of ways to do this - here is just a sample:

  char string [256] = "SELECT UserLevel OF ClassUsers WHERE password = ';"

  HSTMT = DBActivateSQL (hdbc, strcat (string, String));

  JR

• mySQL and SQL Toolkit 2.0

  Hello

  I use a database mySQL and sql toolkit 2.0 in application of Labwindows CVI.

  I have a problem when the database increases in size. Indeed, when the number of records reached 3 million, the program memory is 1.7 GB. So, it stops on an Out of Memory error.

  The program memory increases when I use the DBActivateMap function, before adding the records.

  For now, I use the following method to add records:

  DBBeginMap

  DBMapColumnToDouble

  DBMapColumnToDouble

  ...

  DBActivateMap

  DBCreateRecord

  DBPutRecord

  Will there be another opportunity to open the table and add records?

  Thank you for your help.

  Benjamin

  Hello

  Have you tried to use sql statement directly to y to insert a data, for this, you can use this function:

  DBActivateSQL

  And for the sql statement you can use:

  Table INSERT [] [(GBA)]
  {VALUES (list_of_value) | requete_select |} DEFAULT VALUES}

  Kind regards