Binary data cannot be inserted into a table directly using the INSERT INTO or UPDATE SQL queries. In order to add binary data to a table, you must first use the parameter marker (?) in the query as a placeholder for the binary value. The execution of the query should include a record that contains the binary data in one of its fields.
A marker is a parameter reference to a value supplied by a record submitted with the query. It is represented in the SQL statement by a question mark (?).
The following sample code adds binary data to a table.
#include <windows.h>
#include <Msiquery.h>
#include <tchar.h>
#pragma comment(lib, "msi.lib")
int main()
{
PMSIHANDLE hDatabase = 0;
PMSIHANDLE hView = 0;
PMSIHANDLE hRec = 0;
if (ERROR_SUCCESS == MsiOpenDatabase(_T("c:\\temp\\testdb.msi"), MSIDBOPEN_TRANSACT, &hDatabase))
{
//
// Open view on Binary table so that we can add a new row, must use '?' to represent Binary data
//
if (ERROR_SUCCESS == MsiDatabaseOpenView(hDatabase, _T("INSERT INTO `Binary` (`Name`, `Data`) VALUES ('NewBlob', ?)"), &hView))
{
//
// Create record with binary data in 1st field (must match up with '?' in query)
//
hRec = MsiCreateRecord(1);
if (ERROR_SUCCESS == MsiRecordSetStream(hRec, 1, _T("c:\\temp\\data.bin")))
{
//
// Execute view with record containing binary data value; commit database to save changes
//
if (ERROR_SUCCESS == MsiViewExecute(hView, hRec)
&& ERROR_SUCCESS == MsiViewClose(hView)
&& ERROR_SUCCESS == MsiDatabaseCommit(hDatabase))
{
//
// New binary data successfully committed to the database
//
}
}
}
}
return 0;
}
The following sample script adds binary data to a table.
Dim Installer
Dim Database
Dim View
Dim Record
Set Installer = CreateObject("WindowsInstaller.Installer")
Set Record = Installer.CreateRecord(1)
Record.SetStream 1, "c:\temp\data.bin"
Set Database = Installer.OpenDatabase("c:\temp\testdb.msi", msiOpenDatabaseModeTransact)
Set View = Database.OpenView("INSERT INTO `Binary` (`Name`, `Data`) VALUES ('NewBlob', ?)")
View.Execute Record
Database.Commit ' save changes
See Also
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Build date: 8/13/2009
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