SQL toolkit 2.2 Stored Procedure Memory Leaks

Hi
we are using CVI 2012 and SQL Toolkit 2.2. My db is "MySql 5.5.28" and I use "MySQL Connector/ODBC 5.2(w)"
I use only stored procedure (with and without the output parameters). If I call continuously a stored procedure,
with Sql toolkit code, I have memory leaks!!
My code (without error handler) is:
// iDbConnId is the handle of DBConnect() called when program starts
iStmt = DBPrepareSQL(iDbConnId, "spGetPrData");
DBSetStatementAttribute(iStmt, ATTR_DB_STMT_COMMAND_TYPE, DB_COMMAND_STORED_PROC);
DBExecutePreparedSQL(iStmt);
DBBindColLongLong(iStmt, 1, &llPrId, &lStatus1);
DBBindColInt(iStmt, 2, &iIpPort, &lStatus2);
while(DBFetchNext(iStmt) != DB_EOF)
//get data
DBClosePreparedSQL(iStmt);
DBDiscardSQLStatement(iStmt);
If I call the same stored procedure by sql code ("CALL spProcedure()")
I don't have memory leaks!!
The code is (without error handler):
// iDbConnId is the handle of DBConnect() called when program starts
iStmt = DBActivateSQL(iDbConnId, "CALL spGetPrData();");
DBBindColLongLong(iStmt, 1, &llPrId, &lStatus1);
DBBindColInt(iStmt, 2, &iIpPort, &lStatus2);
while(DBFetchNext(iStmt) != DB_EOF)
//get data
DBDeactivateSQL (iStmt)
It seems to me that the DBDeactivateSQL function free the memory correctly,
while the functions DBClosePreparedSQL and DBDiscardSQLStatement do not release properly the memory,
(or I use improperly the library functions!!!)
I also have a question to ask:
Can I open and close the connection every time I connect to the database or is it mandatory to open and close it just one time?
How can I check the status of the database connection, if is mandatory to open and close the db connection just one time?
Thanks for your help.
Best Regards
Patrizio

Hi,
one of the functions "DBClosePreparedSQL and DBDiscardSQLStatement" is a known problem. In fact, there is a CAR (Corrective Action Request 91490) reporting the problem. What version of the toolkit are you using?
About this function you refer to the manual:
http://digital.ni.com/manuals.nsf/websearch/D3DF4019471D3A9386256B3C006CDC78
Where functions are described. To avoid memory leaks DBDeactivateSQL must be used. DBDeactivateSQL is equivalent to calling DBCloseSQLStatement, then DBDiscardSQLStatement. DBDeativateSQL will work at all for parameterized SQL, as well.
Regarding the connection mode advice to you is to open the connection once and close it at the end of your operations. What do you mean with "state of the database connection"? Remember that if you have connection problems or something goes wrong, the errors appears in any point in your code where you query the database. Bye
Mario

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Supporting SQL Objects:
CREATE FUNCTION [posit].[Get_PositorId]
RETURNS INT
AS
BEGIN
DECLARE @PositorId INT = NULL;
SELECT TOP 1
@PositorId = [p].[PO_PositorId]
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AND [p].[PO_PositorHost] = HOST_NAME()
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@PositorNote NVARCHAR(348) = NULL
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DECLARE @Id TABLE
[Id] INT NOT NULL
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INTO @Id([Id])
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RETURN (SELECT TOP 1 [Id] FROM @Id);
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GO
CREATE TABLE [posit].[PO_Positor]
[PO_PositorId] INT NOT NULL IDENTITY(0, 1),
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[PO_PositorUID] INT NOT NULL CONSTRAINT [DF__PO_Positor_PO_PositorUID] DEFAULT(SUSER_ID()),
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ssd

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Edited by: 963281 on 2012-okt-04 14:25
Edited by: 963281 on 2012-okt-05 01:53

963281 wrote:
I am calling a pl/sql stored procedure from a java program passing two arrays (p_employees) and (p_departments) as parameters to the procedure. Within the procedure I have stored the arrays in a table of records like this:
type t_emp_type is record (employee_id number, department_id number);
type t_emp_tbl_type is table of t_emp_type index by binary_integer;Why do you create an associative array?
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===========================================
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