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Answer Posted / jyothsna
cursor variables are subject to the following
restrictions:You cannot declare cursor variables in a
package spec. For example, the following declaration is not
allowed:CREATE PACKAGE emp_stuff AS TYPE EmpCurTyp IS REF
CURSOR RETURN emp%ROWTYPE; emp_cv EmpCurTyp; -- not
allowedEND emp_stuff;You cannot pass cursor variables to a
procedure that is called through a database link.If you
pass a host cursor variable to PL/SQL, you cannot fetch
from it on the server side unless you also open it there on
the same server call.You cannot use comparison operators to
test cursor variables for equality, inequality, or
nullity.You cannot assign nulls to a cursor
variable.Database columns cannot store the values of cursor
variables. There is no equivalent type to use in a CREATE
TABLE statement.You cannot store cursor variables in an
associative array, nested table, or varray.Cursors and
cursor variables are not interoperable; that is, you cannot
use one where the other is expected. For example, you
cannot reference a cursor variable in a cursor FORloop
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