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50#include <QSqlDatabase>
51#include <QSqlQuery>
52#include <QSqlDriver>
53#include <QSqlResult>
54#include <QVariant>
55#include <QDebug>
56
57void testProc()
58{
59//! [2]
60QSqlQuery q;
61q.exec(query: "call qtestproc (@outval1, @outval2)");
62q.exec(query: "select @outval1, @outval2");
63if (q.next())
64 qDebug() << q.value(i: 0) << q.value(i: 1); // outputs "42" and "43"
65//! [2]
66}
67
68void callStoredProc()
69{
70//! [10]
71// STORED_PROC uses the return statement or returns multiple result sets
72QSqlQuery query;
73query.setForwardOnly(true);
74query.exec(query: "{call STORED_PROC}");
75//! [10]
76}
77
78void setHost()
79{
80//! [24]
81QSqlDatabase db;
82db.setHostName("MyServer");
83db.setDatabaseName("C:\\test.gdb");
84//! [24]
85
86
87//! [25]
88// connect to database using the Latin-1 character set
89db.setConnectOptions("ISC_DPB_LC_CTYPE=Latin1");
90if (db.open())
91 qDebug(msg: "The database connection is open.");
92//! [25]
93}
94
95void exProc()
96{
97//! [26]
98QSqlQuery q;
99q.exec(query: "execute procedure my_procedure");
100if (q.next())
101 qDebug() << q.value(i: 0); // outputs the first RETURN/OUT value
102//! [26]
103
104qDebug( \
105//! [31]
106msg: "QSqlDatabase: QMYSQL driver not loaded \
107QSqlDatabase: available drivers: QMYSQL" \
108//! [31]
109);
110
111/* Commented because the following line is not compilable
112//! [34]
113column.contains(QRegularExpression("pattern"));
114//! [34]
115*/
116}
117
118
119
120void updTable2()
121{
122QSqlDatabase db;
123//! [37]
124int value;
125QSqlQuery query1;
126query1.setForwardOnly(true);
127query1.exec(query: "select * FROM table1");
128while (query1.next()) {
129 value = query1.value(i: 0).toInt();
130 if (value == 1) {
131 QSqlQuery query2;
132 query2.exec(query: "update table2 set col=2"); // WRONG: This will discard all results of
133 } // query1, and cause the loop to quit
134}
135//! [37]
136}
137
138
139void setConnString()
140{
141//! [39]
142QSqlDatabase db = QSqlDatabase::addDatabase(type: "QODBC3");
143QString connectString = QStringLiteral(
144 "DRIVER=/path/to/installation/libodbcHDB.so;"
145 "SERVERNODE=hostname:port;"
146 "UID=USER;"
147 "PWD=PASSWORD;"
148 "SCROLLABLERESULT=true");
149db.setDatabaseName(connectString);
150//! [39]
151}
152

source code of qtbase/src/sql/doc/snippets/code/doc_src_sql-driver.cpp