Get Scroll Insensitive Cursor command

The Get Scroll Insensitive Cursor command creates a scrollable insensitive cursor with the name of the specified Identifier.

It does this by issuing a call to createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY) and then executing the statement with a java.sql.StatementExecuteQuery request on the value of the specified String.

If the String is a statement that does not generate a result set, the behavior of the underlying database determines whether an empty result set or an error is issued. If there is an error in executing the statement, no cursor is created.

ij sets the cursor name using a java.sql.Statement.setCursorName request. Behavior with respect to duplicate cursor names is controlled by the underlying database. Derby does not allow multiple open cursors with the same name.

Once a scrollable cursor has been created, you can use the following commands to work with the result set:

Syntax

GET SCROLL INSENSITIVE [ WITH { HOLD | NOHOLD } ]
   CURSOR Identifier AS String

WITH HOLD is the default attribute of the cursor. For a non-holdable cursor, use the WITH NOHOLD option.

Examples

ij> autocommit off;
ij> get scroll insensitive cursor scrollCursor as
    'SELECT * FROM menu';
ij> absolute 5 scrollCursor;
COURSE    |ITEM                |PRICE
-----------------------------------------------
entree    |lamb chop           |14
ij> after last scrollcursor;
No current row
ij> before first scrollcursor;
No current row
ij> first scrollcursor;
COURSE    |ITEM                |PRICE
-----------------------------------------------
entree    |lamb chop           |14
ij> last scrollcursor;
COURSE    |ITEM                |PRICE
-----------------------------------------------
dessert   |creme brulee        |6
ij> previous scrollcursor;
COURSE    |ITEM                |PRICE
-----------------------------------------------
entree    |lamb chop           |14
ij> relative 1 scrollcursor;
COURSE    |ITEM                |PRICE
-----------------------------------------------
dessert   |creme brulee        |6
ij>>previous scrollcursor;
COURSE    |ITEM                |PRICE
-----------------------------------------------
dessert   |creme brulee        |6
ij> next scrollcursor;
COURSE    |ITEM                |PRICE
-----------------------------------------------
dessert   |creme brulee        |6

ij> connect 'jdbc:derby:memory:dummy;create=true;user=john'
    as john_conn;
ij> create table john_tbl(c int);
0 rows inserted/updated/deleted
ij> insert into john_tbl values(1),(2),(3);
3 rows inserted/updated/deleted
ij> connect 'jdbc:derby:memory:dummy;user=fred' as fred_conn;
ij(FRED_CONN)> get scroll insensitive cursor john_cursor@john_conn 
    as 'select * from john_tbl';
ij(FRED_CONN)> next john_cursor@john_conn;
C          
-----------
1          
ij(FRED_CONN)> getcurrentrownumber john_cursor@john_conn;
1
ij(FRED_CONN)> last john_cursor@john_conn;
C          
-----------
3          
ij(FRED_CONN)> previous john_cursor@john_conn;
C          
-----------
2          
ij(FRED_CONN)> first john_cursor@john_conn;
C          
-----------
1          
ij(FRED_CONN)> after last john_cursor@john_conn;
No current row
ij(FRED_CONN)> before first john_cursor@john_conn;
No current row
ij(FRED_CONN)> relative 2 john_cursor@john_conn;
C          
-----------
2          
ij(FRED_CONN)> absolute 1 john_cursor@john_conn;
C          
-----------
1          
ij(FRED_CONN)> close john_cursor@john_conn;
ij(FRED_CONN)> disconnect all;
ij>