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QSql Namespace Reference

The QSql namespace contains miscellaneous identifiers used throughout the Qt SQL library. More...

 #include <QSql>

• Qt 3 support members

Types

• enum Location { BeforeFirstRow, AfterLastRow }
• enum NumericalPrecisionPolicy { LowPrecisionInt32, LowPrecisionInt64, LowPrecisionDouble, HighPrecision }
• flags ParamType
• enum ParamTypeFlag { In, Out, InOut, Binary }
• enum TableType { Tables, SystemTables, Views, AllTables }

Detailed Description

The QSql namespace contains miscellaneous identifiers used throughout the Qt SQL library.

See also QtSql Module.

Type Documentation

enum QSql::Location

This enum type describes special SQL navigation locations:

See also QSqlQuery::at().

enum QSql::NumericalPrecisionPolicy

This enum type describes at which precision levels numercial values are read from a database.

Some databases support numerical values with a precision that is not storable in a C++ basic data type. The default behavior is to bind these values as a QString. This enum can be used to override this behavior.

Note: The actual behaviour if an overflow occurs is driver specific. The Oracle database just returns an error in this case.

enum QSql::ParamTypeFlag
flags QSql::ParamType

This enum is used to specify the type of a bind parameter.

The ParamType type is a typedef for QFlags<ParamTypeFlag>. It stores an OR combination of ParamTypeFlag values.

enum QSql::TableType

This enum type describes types of SQL tables.