All values must be set in the constructor, and may be retrieved using isRequired(), type(), length(), precision(), defaultValue(), name(), isGenerated() and typeID().
l - l. \fIname\fR the name of the field. \fItyp\fR the field's type in a TQVariant. \fIrequired\fR 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. \fIlen\fR 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. \fIprec\fR the precision of the field, or -1 if the field has no precision or it cannot be determined. \fIdefValue\fR the default value that is inserted into the table if none is specified by the user. TQVariant() if there is no default value or it cannot be determined. \fItypeID\fR the internal typeID of the database system (only useful for low-level programming). 0 if unknown. \fIgenerated\fR TRUE indicates that this field should be included in auto-generated SQL statments, e.g. in TQSqlCursor. \fItrim\fR TRUE indicates that widgets should remove trailing whitespace from character fields. This does not affect the field value but only its representation inside widgets. \fIcalculated\fR
Creates a TQSqlFieldInfo object with the type and the name of the TQSqlField \fIother\fR. If \fIgenerated\fR is TRUE this field will be included in auto-generated SQL statments, e.g. in TQSqlCursor.
Returns the field's default value or an empty TQVariant 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.
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.
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.
\fIcalc\fR set to TRUE indicates that this field is a calculated field. The value of calculated fields can by modified by subclassing TQSqlCursor and overriding TQSqlCursor::calculateField().
If \fItrim\fR is TRUE widgets should remove trailing whitespace from character fields. This does not affect the field value but only its representation inside widgets.
