QSqlResult Class Reference
[QtSql module]

QVariant QSqlResult::handle () const   [virtual]

Returns the low-level database handle for this result set wrapped in a QVariant or an invalid QVariant if there is no handle.

Warning: Use this with uttermost care and only if you know what you're doing.

Warning: The handle returned here can become a stale pointer if the result is modified (for example, if you clear it).

Warning: The handle can be NULL if the result was not executed yet.

The handle returned here is database-dependent, you should query the type name of the variant before accessing it.

This example retrieves the handle for a sqlite result:

 QSqlQuery query = ...
 QVariant v = query.result()->handle();
 if (v.isValid() && qstrcmp(v.typeName(), "sqlite3_stmt*")) {
     // v.data() returns a pointer to the handle
     sqlite3_stmt *handle = *static_cast<sqlite3_stmt **>(v.data());
     if (handle != 0) { // check that it is not NULL
         ...
     }
 }

This snippet returns the handle for PostgreSQL or MySQL:

 if (v.typeName() == "PGresult*") {
     PGresult *handle = *static_cast<PGresult **>(v.data());
     if (handle != 0) ...
 }

 if (v.typeName() == "MYSQL_STMT*") {
     MYSQL_STMT *handle = *static_cast<MYSQL_STMT **>(v.data());
     if (handle != 0) ...
 }

See also QSqlDriver::handle().