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50 #include <QSqlDatabase>
51 #include <QSqlQuery>
52 #include <QSqlDriver>
53 #include <QVariant>
54
checkHandle()55 void checkHandle()
56 {
57 //dummy definitions
58 typedef void sqlite3;
59 typedef void PGconn;
60 typedef void MYSQL;
61 //! [0]
62 QSqlDatabase db = QSqlDatabase::database();
63 QVariant v = db.driver()->handle();
64 if (v.isValid() && (qstrcmp(v.typeName(), "sqlite3*") == 0)) {
65 // v.data() returns a pointer to the handle
66 sqlite3 *handle = *static_cast<sqlite3 **>(v.data());
67 if (handle) {
68 // ...
69 }
70 }
71 //! [0]
72
73 //! [1]
74 if (qstrcmp(v.typeName(), "PGconn*") == 0) {
75 PGconn *handle = *static_cast<PGconn **>(v.data());
76 if (handle) {
77 // ...
78 }
79 }
80
81 if (qstrcmp(v.typeName(), "MYSQL*") == 0) {
82 MYSQL *handle = *static_cast<MYSQL **>(v.data());
83 if (handle) {
84 // ...
85 }
86 }
87 //! [1]
88 }
89