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Please review the following information to ** ensure the GNU General Public License version 3.0 requirements will be ** met: http://www.gnu.org/copyleft/gpl.html. ** ** If you are unsure which license is appropriate for your use, please ** contact the sales department at qt-sales@nokia.com. ** $QT_END_LICENSE$ ** ****************************************************************************/ /*! \class Q3SqlFieldInfo \brief The Q3SqlFieldInfo class stores meta data associated with a SQL field. \compat Q3SqlFieldInfo objects only store meta data; field values are stored in QSqlField objects. All values must be set in the constructor, and may be retrieved using isRequired(), type(), length(), precision(), defaultValue(), name(), isGenerated() and typeID(). \sa Q3SqlRecordInfo */ /*! \fn Q3SqlFieldInfo::Q3SqlFieldInfo(const QString& name, QVariant::Type typ, int required, int len, int prec, const QVariant& defValue, int typeID, bool generated, bool trim, bool calculated) Constructs a Q3SqlFieldInfo with the following parameters: \table \row \i \a name \i the name of the field. \row \i \a typ \i the field's type in a QVariant. \row \i \a required \i greater than 0 if the field is required, 0 if its value can be NULL and less than 0 if it cannot be determined whether the field is required or not. \row \i \a len \i the length of the field. Note that for non-character types some databases return either the length in bytes or the number of digits. -1 signifies that the length cannot be determined. \row \i \a prec \i the precision of the field, or -1 if the field has no precision or it cannot be determined. \row \i \a defValue \i the default value that is inserted into the table if none is specified by the user. QVariant() if there is no default value or it cannot be determined. \row \i \a typeID \i the internal typeID of the database system (only useful for low-level programming). 0 if unknown. \row \i \a generated \i TRUE indicates that this field should be included in auto-generated SQL statments, e.g. in Q3SqlCursor. \row \i \a trim \i TRUE indicates that widgets should remove trailing whitespace from character fields. This does not affect the field value but only its representation inside widgets. \row \i \a calculated \i TRUE indicates that the value of this field is calculated. The value of calculated fields can by modified by subclassing Q3SqlCursor and overriding Q3SqlCursor::calculateField(). \endtable */ /*! \fn Q3SqlFieldInfo::~Q3SqlFieldInfo() Destroys the object and frees any allocated resources. */ /*! \fn Q3SqlFieldInfo::Q3SqlFieldInfo(const QSqlField & other) Creates a Q3SqlFieldInfo object with the type and the name of the QSqlField \a other. */ /*! \fn bool Q3SqlFieldInfo::operator==(const Q3SqlFieldInfo& other) const Assigns \a other to this field info and returns a reference to it. */ /*! \fn QSqlField Q3SqlFieldInfo::toField() const Returns an empty QSqlField based on the information in this Q3SqlFieldInfo. */ /*! \fn int Q3SqlFieldInfo::isRequired() const Returns a value greater than 0 if the field is required (NULL values are not allowed), 0 if it isn't required (NULL values are allowed) or less than 0 if it cannot be determined whether the field is required or not. */ /*! \fn QVariant::Type Q3SqlFieldInfo::type() const Returns the field's type or QVariant::Invalid if the type is unknown. */ /*! \fn int Q3SqlFieldInfo::length() const Returns the field's length. For fields storing text the return value is the maximum number of characters the field can hold. For non-character fields some database systems return the number of bytes needed or the number of digits allowed. If the length cannot be determined -1 is returned. */ /*! \fn int Q3SqlFieldInfo::precision() const Returns the field's precision or -1 if the field has no precision or it cannot be determined. */ /*! \fn QVariant Q3SqlFieldInfo::defaultValue() const Returns the field's default value or an empty QVariant if the field has no default value or the value couldn't be determined. The default value is the value inserted in the database when it is not explicitly specified by the user. */ /*! \fn QString Q3SqlFieldInfo::name() const Returns the name of the field in the SQL table. */ /*! \fn int Q3SqlFieldInfo::typeID() const Returns the internal type identifier as returned from the database system. The return value is 0 if the type is unknown. */ /*! \fn bool Q3SqlFieldInfo::isGenerated() const Returns TRUE if the field should be included in auto-generated SQL statments, e.g. in Q3SqlCursor; otherwise returns FALSE. \sa setGenerated() */ /*! \fn bool Q3SqlFieldInfo::isTrim() const Returns TRUE if trailing whitespace should be removed from character fields; otherwise returns FALSE. \sa setTrim() */ /*! \fn bool Q3SqlFieldInfo::isCalculated() const Returns TRUE if the field is calculated; otherwise returns FALSE. \sa setCalculated() */ /*! \fn void Q3SqlFieldInfo::setTrim(bool trim) If \a trim is TRUE widgets should remove trailing whitespace from character fields. This does not affect the field value but only its representation inside widgets. \sa isTrim() */ /*! \fn void Q3SqlFieldInfo::setGenerated(bool generated) \a generated set to FALSE indicates that this field should not appear in auto-generated SQL statements (for example in Q3SqlCursor). \sa isGenerated() */ /*! \fn void Q3SqlFieldInfo::setCalculated(bool calculated) \a calculated set to TRUE indicates that this field is a calculated field. The value of calculated fields can by modified by subclassing Q3SqlCursor and overriding Q3SqlCursor::calculateField(). \sa isCalculated() */