UpdateData sets the value that the element stored in the row (indicated by the row cursor) and the column (indicated by index) will be changed to on a call to UpdateRow. The value the element will be changed to is data.

To update a row, set the new values by by calling UpdateData and then submit these updates by calling UpdateRow.  Changing the current row discards any values set with UpdateData.

Maple can automatically determine the type of the column and convert data; however, this requires querying the type of the column.  To avoid this overhead the type can be specified using an explicit cast. For more information, see conversions.

An element can be set to SQL NULL by passing 'SQLNULL' for data.

Not all Result modules can be updated.  Only Result modules representing tables containing data from a single table (no joins) and a column of primary keys are guaranteed to be updatable.  Particular JDBC Drivers and databases may allow a wider range of updatable tables and thus Result modules.

$\mathrm{driver}≔\mathrm{Database}\left[\mathrm{LoadDriver}\right]\left(\right)\:$

$\mathrm{conn}≔\mathrm{driver}:-\mathrm{OpenConnection}\left(\mathrm{url}\,\mathrm{name}\,\mathrm{pass}\right)\:$$\mathrm{res}≔\mathrm{conn}:-\mathrm{ExecuteQuery}\left(''SELECT\; id,name,number,mass\; FROM\; animals''\right)\:$$\mathrm{res}:-\mathrm{Next}\left(\right)$

$\mathrm{true}$

$\mathrm{res}:-\mathrm{GetData}\left(2\right)$

$''fish''$

$\mathrm{res}:-\mathrm{GetData}\left(3\right)$

$100$

$\mathrm{res}:-\mathrm{GetData}\left(4\right)$

$0.0100000000000000002$

$\mathrm{res}:-\mathrm{UpdateData}\left(2\,''chicken''\right)\;$$\mathrm{res}:-\mathrm{UpdateData}\left(3\,6\right)\;$$\mathrm{res}:-\mathrm{UpdateData}\left(4\,2.5\right)$

$\mathrm{res}:-\mathrm{GetData}\left(2\right)$

$''fish''$

$\mathrm{res}:-\mathrm{GetData}\left(3\right)$

$100$

$\mathrm{res}:-\mathrm{GetData}\left(4\right)$

$0.0100000000000000002$

$\mathrm{res}:-\mathrm{UpdateRow}\left(\right)$

$\mathrm{res}:-\mathrm{GetData}\left(2\right)$

$''chicken''$

$\mathrm{res}:-\mathrm{GetData}\left(3\right)$

$6$

$\mathrm{res}:-\mathrm{GetData}\left(4\right)$

$2.50000000000000000$