REMOVE_PIPE v16

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The REMOVE_PIPE function deletes an explicit private or explicit public pipe.

<status> INTEGER REMOVE_PIPE(<pipename> VARCHAR2)

Use the REMOVE_PIPE function to delete explicitly created pipes, that is, pipes created with the CREATE_PIPE function.

Parameters

pipename

Name of the pipe.

status

Status code returned by the operation. A status code of 0 is returned even if the named pipe is nonexistent.

Examples

Two messages are sent on a pipe:

DECLARE
    v_status        INTEGER;
BEGIN
    v_status := DBMS_PIPE.CREATE_PIPE('pipe');
    DBMS_OUTPUT.PUT_LINE('CREATE_PIPE status : ' || v_status);

    DBMS_PIPE.PACK_MESSAGE('Message #1');
    v_status := DBMS_PIPE.SEND_MESSAGE('pipe');
    DBMS_OUTPUT.PUT_LINE('SEND_MESSAGE status: ' || v_status);

    DBMS_PIPE.PACK_MESSAGE('Message #2');
    v_status := DBMS_PIPE.SEND_MESSAGE('pipe');
    DBMS_OUTPUT.PUT_LINE('SEND_MESSAGE status: ' || v_status);
END;

CREATE_PIPE status : 0
SEND_MESSAGE status: 0
SEND_MESSAGE status: 0

Receive the first message and unpack it:

DECLARE
    v_item          VARCHAR2(80);
    v_status        INTEGER;
BEGIN
    v_status := DBMS_PIPE.RECEIVE_MESSAGE('pipe',1);
    DBMS_OUTPUT.PUT_LINE('RECEIVE_MESSAGE status: ' || v_status);
    DBMS_PIPE.UNPACK_MESSAGE(v_item);
    DBMS_OUTPUT.PUT_LINE('Item: ' || v_item);
END;

RECEIVE_MESSAGE status: 0
Item: Message #1

Remove the pipe:

SELECT DBMS_PIPE.REMOVE_PIPE('pipe') FROM DUAL;
Output
remove_pipe
-------------
        0
(1 row)

Try to retrieve the next message. The RECEIVE_MESSAGE call returns status code 1 indicating it timed out because the pipe was deleted.

DECLARE
    v_item          VARCHAR2(80);
    v_status        INTEGER;
BEGIN
    v_status := DBMS_PIPE.RECEIVE_MESSAGE('pipe',1);
    DBMS_OUTPUT.PUT_LINE('RECEIVE_MESSAGE status: ' || v_status);
END;

RECEIVE_MESSAGE status: 1
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