Qt psql7 driver plugin

You should use the native driver, if it is available, instead of the ODBC driver. ODBC support can be used as a fallback for compliant databases if no native driver is available. For Unix systems, there are some implementations which must be installed first. Some ODBC drivers claim to be version The QODBC plugin therefore checks whether the data source can be used after a connection has been established, and refuses to work if the check fails.

Do this at your own risk! To avoid this problem, instruct the ODBC driver to behave as a 3. Note that this will affect multiple aspects of ODBC driver behavior, e. Before setting this connect option, consult your ODBC documentation about behavior differences you can expect. Some drivers do not support scrollable cursors. In that case, only queries in forwardOnly mode can be used successfully. On Windows NT based systems, this is the default.

It is recommended that you use unixODBC. You need the unixODBC header files and shared libraries. The ODBC header and include files should already be installed in the right directories. You just have to build the plugin as follows:. Unicode is automatically used if the server supports it. Note that the driver only supports the UTF-8 encoding.

If your database uses any other encoding, the server must be compiled with Unicode conversion support. Unicode support was introduced in PostgreSQL version 7. PostgreSQL databases will only respect case sensitivity if the table or field name is quoted when the table is created.

So for example, a SQL query such as:. If the table or field name is not quoted when created, the actual table name or field name will be lower-case. When record or primaryIndex access a table or field that was unquoted when created, the name passed to the function must be lower-case to ensure it is found. For example:. If the plugin is built with an older version, then forward-only mode will not be available - calling setForwardOnly with true will have no effect.

While navigating the results in forward-only mode, the handle of QSqlResult may change. Applications that use the low-level handle of SQL result must get a new handle after each call to any of QSqlResult fetch functions. While reading the results of a forward-only query with PostgreSQL, the database connection cannot be used to execute other queries. This is a limitation of libpq library. The QODBC plugin therefore checks whether the data source can be used after a connection has been established, and refuses to work if the check fails.

Do this at your own risk! To avoid this problem, instruct the ODBC driver to behave as a 3. Note that this will affect multiple aspects of ODBC driver behavior, e. Before setting this connect option, consult your ODBC documentation about behavior differences you can expect. Some drivers do not support scrollable cursors. In that case, only queries in forwardOnly mode can be used successfully. With Microsoft SQL Server the result set returned by a stored procedure that uses the return statement, or returns multiple result sets, will be accessible only if you set the query's forward only mode to forward using QSqlQuery::setForwardOnly.

On Windows NT based systems, this is the default. It is recommended that you use unixODBC. You need the unixODBC header files and shared libraries. The ODBC header and include files should already be installed in the right directories. You just have to build the plugin as follows:. Unicode is automatically used if the server supports it. Note that the driver only supports the UTF-8 encoding.

If your database uses any other encoding, the server must be compiled with Unicode conversion support. Unicode support was introduced in PostgreSQL version 7. PostgreSQL databases will only respect case sensitivity if the table or field name is quoted when the table is created.

So for example, a SQL query such as:. If the table or field name is not quoted when created, the actual table name or field name will be lower-case. When QSqlDatabase::record or QSqlDatabase::primaryIndex access a table or field that was unquoted when created, the name passed to the function must be lower-case to ensure it is found.

If the plugin is built with an older version, then forward-only mode will not be available - calling QSqlQuery::setForwardOnly with true will have no effect.

While navigating the results in forward-only mode, the handle of QSqlResult may change. Applications that use the low-level handle of SQL result must get a new handle after each call to any of QSqlResult fetch functions. While reading the results of a forward-only query with PostgreSQL, the database connection cannot be used to execute other queries.

This is a limitation of libpq library. This problem will not occur if query1 and query2 use different database connections, or if we execute query2 after the while loop. Note: Some methods of QSqlDatabase like tables , primaryIndex implicity execute SQL queries, so these also cannot be used while navigating the results of forward-only query. Install the appropriate PostgreSQL developer libraries for your compiler. When you distribute your application, remember to include libpq.

QTDS is obsolete from Qt 4. It is not possible to set the port with QSqlDatabase::setPort due to limitations in the Sybase client library. This is not typically a question where to find a step-by-step guide, but rather the guide itself. My intention with this post is to give others a hint, who have the same problems in compiling the driver-plugin as I just had recently. Create file 'sqlcipher. When delivering a Qt-program do not forget the Qt-libraries, the platforms-libraries, SQL-driver-plugin 'qsqlcipher.

Example for the test program above:. This key string in the binary file of the test program can easiliy be read using a hex-editor, which is, to my opinion, a lack in security:. For approaches how to solve this problem, ask the search engine of your own choice. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?

Collectives on Stack Overflow. Learn more. Ask Question. Asked 6 years, 9 months ago. Active 3 years, 11 months ago. SQLite is the in-process database system with the best test coverage and support on all platforms.

The completeness of the support for other systems depends on the availability and quality of client libraries. Most installation programs also allow you to install "development libraries", and these are what you need.

These libraries are responsible for the low-level communication with the DBMS. The Qt configure script tries to automatically detect the available client libraries on your machine. Run configure -help to see what drivers can be built. You should get an output similar to this:. The particulars for each driver are explained below. Due to the practicalities of dealing with external dependencies, only the SQLite3 plugin is shipped with binary builds of Qt.

Note that it is not possible to configure each driver separately, only all of them at once. Drivers can be built separately, though. If the Qt build is configured with -prefix , it is necessary to install the plugins after building them, too. For example:.

Note: outval1 and outval2 are variables local to the current connection and will not be affected by queries sent from another host or connection. The MySQL embedded server is a drop-in replacement for the normal client library. You need the MySQL header files, as well as the shared library libmysqlclient. Depending on your Linux distribution, you may need to install a package which is usually called "mysql-devel". You need to get the MySQL installation files. EXE and choose "Custom Install".

If you are not using a Microsoft compiler, replace nmake with mingwmake in the line above. After connecting to the Oracle server, the plugin will auto-detect the database version and enable features accordingly.

It's possible to connect to a Oracle database without a tnsnames. This requires that the database SID is passed to the driver as the database name, and that a hostname is given. Usually, this means that the database server will use the user authentication provided by the operating system instead of its own authentication mechanism. Leave the username and password empty when opening a connection with QSqlDatabase to use the external credentials authentication. Here is an example:.

When you run your application, you will also need to add the oci. ODBC support can be used as a fallback for compliant databases if no native driver is available.