DECLARE

   DECLARE — define a cursor

Synopsis

DECLARE cursor_name [ BINARY ] [ ASENSITIVE | INSENSITIVE ] [ [ NO ] SCROLL ] CU
RSOR [ { WITH | WITHOUT } HOLD ] FOR prepared_name
DECLARE cursor_name [ BINARY ] [ ASENSITIVE | INSENSITIVE ] [ [ NO ] SCROLL ] CU
RSOR [ { WITH | WITHOUT } HOLD ] FOR query

Description

   DECLARE declares a cursor for iterating over the result set of a
   prepared statement. This command has slightly different semantics from
   the direct SQL command DECLARE: Whereas the latter executes a query and
   prepares the result set for retrieval, this embedded SQL command merely
   declares a name as a “loop variable” for iterating over the result set
   of a query; the actual execution happens when the cursor is opened with
   the OPEN command.

Parameters

   cursor_name #
          A cursor name, case sensitive. This can be an SQL identifier or
          a host variable.

   prepared_name #
          The name of a prepared query, either as an SQL identifier or a
          host variable.

   query #
          A SELECT or VALUES command which will provide the rows to be
          returned by the cursor.

   For the meaning of the cursor options, see DECLARE.

Examples

   Examples declaring a cursor for a query:
EXEC SQL DECLARE C CURSOR FOR SELECT * FROM My_Table;
EXEC SQL DECLARE C CURSOR FOR SELECT Item1 FROM T;
EXEC SQL DECLARE cur1 CURSOR FOR SELECT version();

   An example declaring a cursor for a prepared statement:
EXEC SQL PREPARE stmt1 AS SELECT version();
EXEC SQL DECLARE cur1 CURSOR FOR stmt1;

Compatibility

   DECLARE is specified in the SQL standard.

See Also

   OPEN, CLOSE, DECLARE