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QSqlIndex Class Reference
[модуль QtSql]

The QSqlIndex class provides functions to manipulate and describe database indexes. Далее...

 #include <QSqlIndex>

Inherits QSqlRecord.

• Список всех членов, включая унаследованные
• Поддерживаемые члены Qt 3

Открытые функции

• QSqlIndex ( const QString & cursorname = QString(), const QString & name = QString() )
• QSqlIndex ( const QSqlIndex & other )
• ~QSqlIndex ()
• void append ( const QSqlField & field )
• void append ( const QSqlField & field, bool desc )
• QString cursorName () const
• bool isDescending ( int i ) const
• QString name () const
• void setCursorName ( const QString & cursorName )
• void setDescending ( int i, bool desc )
• void setName ( const QString & name )
• QSqlIndex & operator= ( const QSqlIndex & other )

• 28 public functions inherited from QSqlRecord

Подробное описание

The QSqlIndex class provides functions to manipulate and describe database indexes.

An index refers to a single table or view in a database. Information about the fields that comprise the index can be used to generate SQL statements.

Описание функций-членов

QSqlIndex::QSqlIndex ( const QString & cursorname = QString(), const QString & name = QString() )

Constructs an empty index using the cursor name cursorname and index name name.

QSqlIndex::QSqlIndex ( const QSqlIndex & other )

Создаёт копию other.

QSqlIndex::~QSqlIndex ()

Удаляет объект и освобождает все выделенные ему ресурсы.

void QSqlIndex::append ( const QSqlField & field )

Appends the field field to the list of indexed fields. The field is appended with an ascending sort order.

void QSqlIndex::append ( const QSqlField & field, bool desc )

Это перегруженная функция.

Appends the field field to the list of indexed fields. The field is appended with an ascending sort order, unless desc is true.

QString QSqlIndex::cursorName () const

Returns the name of the cursor which the index is associated with.

See also setCursorName().

bool QSqlIndex::isDescending ( int i ) const

Returns true if field i in the index is sorted in descending order; otherwise returns false.

QString QSqlIndex::name () const

Returns the name of the index.

See also setName().

void QSqlIndex::setCursorName ( const QString & cursorName )

Sets the name of the cursor that the index is associated with to cursorName.

See also cursorName().

void QSqlIndex::setDescending ( int i, bool desc )

If desc is true, field i is sorted in descending order. Otherwise, field i is sorted in ascending order (the default). If the field does not exist, nothing happens.

See also isDescending().

void QSqlIndex::setName ( const QString & name )

Sets the name of the index to name.

See also name().

QSqlIndex & QSqlIndex::operator= ( const QSqlIndex & other )

Sets the index equal to other.