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Filename : plpgsql.txt
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-- PL/pgSQL

<< outerblock >>
DECLARE
    quantity integer := 30;
    subtotal ALIAS FOR $1;
    prior ALIAS FOR old;
    arow record;
    curs1 refcursor;
    curs2 CURSOR FOR SELECT * FROM tenk1;
BEGIN
    DECLARE
        quantity CONSTANT integer := 80;
        myrow tablename%ROWTYPE;
        myfield tablename.columnname%TYPE;
    BEGIN
        PERFORM pg_sleep(1);
        RAISE NOTICE 'Quantity here is %', quantity;
    END;

    SELECT * INTO myrec FROM emp WHERE empname = myname;

    IF NOT FOUND THEN
        EXIT <<outer_block>>;
    ELSIF quantity < 0 THEN
        ASSERT a > b, 'Bad luck';
    END IF;

    FOR r IN SELECT * FROM foo LOOP
        CONTINUE WHEN count < 50;
    END LOOP;

    FOR i IN REVERSE 10..1 LOOP
        FOREACH x IN ARRAY $1
        LOOP
            s := s + x;
        END LOOP;
    END LOOP;

    WHILE NOT done LOOP
        CASE x
            WHEN 1, 2 THEN RETURN NEXT r;
            ELSE RETURN QUERY SELECT * FROM sales;
        END CASE;
    END LOOP;

    EXECUTE 'SELECT count(*) FROM mytable WHERE inserted_by = $1' INTO c USING checked_user;

    OPEN curs1 SCROLL FOR SELECT * FROM foo WHERE key = mykey;
    FETCH LAST FROM curs1 INTO x, y;
    MOVE RELATIVE -2 FROM curs1;
    UPDATE foo SET dataval = myval WHERE CURRENT OF curs1;
    CLOSE curs1;

    RETURN quantity;
EXCEPTION
    WHEN NO_DATA_FOUND THEN
        GET DIAGNOSTICS integer_var = ROW_COUNT;
    WHEN SQLSTATE '22012' THEN
        NULL;
END;