The first example shows how to use a RETURNS clause when invoking an external stored procedure. The RETURNS clause explicitly specifies a return type of INTEGER for the result_1 OUT parameter.
For this example to be valid, the OUT parameter result_1 must be defined with a data type of TD_ANYTYPE in xsp_1.
CALL xsp_1(10.25, result_1 RETURNS INTEGER);
The second example shows how to specify a RETURNS STYLE clause when invoking an external stored procedure.
This example refers to table t1, which has the following definition.
CREATE TABLE t1 ( int_col INTEGER, varchar_col VARCHAR(40) CHARACTER SET UNICODE);
The RETURNS STYLE clause implicitly specifies a return type of VARCHAR(40) CHARACTER SET UNICODE for the result_1 OUT parameter of xsp_2 because that is the data type for column varchar_col in table t1.
For this example to be valid, the OUT parameter result_1 must be defined with a data type of TD_ANYTYPE in xsp_2.
CALL xsp_2(10, 'abc', result_1 RETURNS STYLE t1.varchar_col);