Qt Reference Documentation

# QSqlIndex Class Reference

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

     #include <QSqlIndex>

Inherits: QSqlRecord.

- List of all members, including inherited members
- Qt 3 support members

## Public Functions

| 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

## Detailed Description

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.

## Member Function Documentation

### 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 )

Constructs a copy of other.

### QSqlIndex::~QSqlIndex ()

Destroys the object and frees any allocated resources.

### 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 )

This is an overloaded 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.

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.