QSql Namespace

The QSql namespace holds identifiers that are used throughout Nt SQL. More…

Header	`#include <QSql>`
CMake	`target_link_libraries(app PRIVATE Nt::Sql)`
Module	Nt SQL C++ Classes

Public Types

enum	Location
enum	ParamTypeFlag
typedef	ParamType
enum	TableType
enum	NumericalPrecisionPolicy

Detailed Description

Differences from Qt

None.

Member Type Documentation

enum QSql::Location

The special positions of a query, as returned by QSqlQuery::at().

Constant	Description
`QSql::BeforeFirstRow`	The query is positioned before the first row.
`QSql::AfterLastRow`	The query is positioned after the last row.

enum QSql::NumericalPrecisionPolicy

How numbers that do not fit a double without loss are returned. The SQLite driver stores what SQLite stores, a 64-bit integer or a double, so it accepts the policy and ignores it.

Constant	Description
`QSql::LowPrecisionInt32`	Return a 32-bit integer.
`QSql::LowPrecisionInt64`	Return a 64-bit integer.
`QSql::LowPrecisionDouble`	Return a `double`. This is the default.
`QSql::HighPrecision`	Return a string that keeps every digit.

typedef QSql::ParamType

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

enum QSql::ParamTypeFlag

The kind of a value that is bound to a placeholder.

Constant	Description
`QSql::In`	The value is passed to the database.
`QSql::Out`	The database writes the value. No driver of Nt has output parameters.
`QSql::InOut`	The value is passed to the database, which may overwrite it.
`QSql::Binary`	The value is binary data. This can be combined with the other values.

enum QSql::TableType

The kinds of tables that QSqlDatabase::tables() lists.

Constant	Description
`QSql::Tables`	The tables that the user can see.
`QSql::SystemTables`	The tables that the database uses internally.
`QSql::Views`	The views that the user can see.
`QSql::AllTables`	All of the above.