OPEN — open a dynamic cursor
OPENcursor_nameOPENcursor_nameUSINGvalue[, ... ] OPENcursor_nameUSING SQL DESCRIPTORdescriptor_name
OPEN opens a cursor and optionally binds actual values to the placeholders in the cursor's declaration. The cursor must previously have been declared with the DECLARE command. The execution of OPEN causes the query to start executing on the server.
cursor_nameThe name of the cursor to be opened. This can be an SQL identifier or a host variable.
valueA value to be bound to a placeholder in the cursor. This can be an SQL constant, a host variable, or a host variable with indicator.
descriptor_nameThe name of a descriptor containing values to be bound to the placeholders in the cursor. This can be an SQL identifier or a host variable.
EXEC SQL OPEN a; EXEC SQL OPEN d USING 1, 'test'; EXEC SQL OPEN c1 USING SQL DESCRIPTOR mydesc; EXEC SQL OPEN :curname1;
OPEN is specified in the SQL standard.
Read the upstream documentation. For corrections, first check the current version.