QSqlIndex Class Reference
[sql module]
The QSqlIndex class provides functions to manipulate and
describe QSqlCursor and QSqlDatabase indexes.
More...
#include <qsqlindex.h>
Inherits QSqlRecord.
List of all member functions.
Public Members
Static Public Members
- QSqlIndex fromStringList ( const QStringList & l, const QSqlCursor * cursor )
Detailed Description
The QSqlIndex class provides functions to manipulate and
describe QSqlCursor and QSqlDatabase indexes.
This class is used to describe and manipulate QSqlCursor and
QSqlDatabase 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, or to affect the
behavior of a QSqlCursor object.
Normally, QSqlIndex objects are created by QSqlDatabase or
QSqlCursor.
See also Database Classes.
Member Function Documentation
QSqlIndex::QSqlIndex ( const QString & cursorname = QString::null, const QString & name = QString::null )
Constructs an empty index using the cursor name cursorname and
index name name.
QSqlIndex::QSqlIndex ( const QSqlIndex & other )
Constructs a copy of other.
QSqlIndex::~QSqlIndex ()
Destroys the object and frees any allocated resources.
void QSqlIndex::append ( const QSqlField & field ) [virtual]
Appends the field field to the list of indexed fields. The
field is appended with an ascending sort order.
Reimplemented from QSqlRecord.
void QSqlIndex::append ( const QSqlField & field, bool desc ) [virtual]
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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.
QSqlIndex QSqlIndex::fromStringList ( const QStringList & l, const QSqlCursor * cursor ) [static]
Returns an index based on the field descriptions in l and the
cursor cursor. The field descriptions should be in the same
format that toStringList() produces, for example, a surname field
in the people table might be in one of these forms: "surname",
"surname DESC" or "people.surname ASC".
See also toStringList().
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.
QSqlIndex & QSqlIndex::operator= ( const QSqlIndex & other )
Sets the index equal to other.
void QSqlIndex::setCursorName ( const QString & cursorName ) [virtual]
Sets the name of the cursor that the index is associated with to
cursorName.
void QSqlIndex::setDescending ( int i, bool desc ) [virtual]
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.
void QSqlIndex::setName ( const QString & name ) [virtual]
Sets the name of the index to name.
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