Sql 深树很少，即更新的行数很大。索引有助于查找要更新的行，但更新索引本身需要时间。 create table test ( id int not null primary key, parent_id int not null, name varc

深树很少，即更新的行数很大。索引有助于查找要更新的行，但更新索引本身需要时间。

create table test (
  id int not null primary key,
  parent_id int not null,
  name varchar(100),
  mtime timestamp default current_timestamp
);
insert into test(id, parent_id, name) values(1, 0, "row1");
insert into test(id, parent_id, name) values(2, 1, "row2");
insert into test(id, parent_id, name) values(3, 2, "row3");
insert into test(id, parent_id, name) values(4, 2, "row4");
insert into test(id, parent_id, name) values(5, 4, "row5");
insert into test(id, parent_id, name) values(6, 4, "row6");
insert into test(id, parent_id, name) values(7, 6, "row7");

row1
|
row2--row4--row5
|     |
row3  row6
      |
      row7

create procedure upd_test (start_id integer)
as
begin
    WITH RECURSIVE
    CTE (id)
    AS
    (
        SELECT T.id
        FROM test AS T
        WHERE T.id = :start_id

        UNION ALL

        SELECT T.id
        FROM
            test AS T
            INNER JOIN CTE ON CTE.id = T.parent_id
    )
    UPDATE test
        SET mtime = '2001-02-03 10:11:12'
        WHERE id IN (SELECT id FROM CTE);
end

Invalid token.
Dynamic SQL Error.
SQL error code = -104.
Token unknown - line 19, column 5.
UPDATE.

UPDATE t
SET t.mtime = GETDATE()
FROM dbo.TreeTable t INNER JOIN #tmpid i ON t.id = i.id

DELETE t FROM dbo.TreeTable t INNER JOIN #tmpid i ON t.id =i.id

CREATE UNIQUE CLUSTERED INDEX idx_treetable_id
  ON dbo.TreeTable(id);
CREATE UNIQUE INDEX idx_treetable_unique
    ON dbo.TreeTable(id,parent_id)
CREATE NONCLUSTERED INDEX idx_parent_id
  ON dbo.TreeTable(parent_id);
GO

With Recurs AS
( 
select id, name, parent_id
from test
union
select id, name, parent_id
from Recurs r
where id=r.parent_id
)
select *
from Recurs
order by id
option (maxrecursion 0)

UPDATE TEST SET 
MTIME = '2001-02-03 10:11:12'
WHERE ID IN
(
    WITH RECURSIVE
    CTE (id)
    AS
    (
        SELECT T.id
        FROM test AS T
        WHERE T.id = 4

        UNION ALL

        SELECT T.id
        FROM
            test AS T
            INNER JOIN CTE ON CTE.id = T.parent_id
    )
    SELECT id FROM CTE
);

DELETE FROM TEST
WHERE ID IN
(
    WITH RECURSIVE
    CTE (id)
    AS
    (
        SELECT T.id
        FROM test AS T
        WHERE T.id = 4

        UNION ALL

        SELECT T.id
        FROM
            test AS T
            INNER JOIN CTE ON CTE.id = T.parent_id
    )
    SELECT id FROM CTE
);

CREATE GLOBAL TEMPORARY TABLE ToDelete
(id int not null primary key);

INSERT INTO ToDelete
WITH RECURSIVE
CTE (id)
AS
(
    SELECT T.id
    FROM test AS T
    WHERE T.id = 4

    UNION ALL

    SELECT T.id
    FROM
        test AS T
        INNER JOIN CTE ON CTE.id = T.parent_id
)
SELECT id FROM CTE
;

DELETE FROM TEST
WHERE ID IN (SELECT ID FROM ToDelete)
;

DELIMITER $$ 

CREATE PROCEDURE upd_test( IN start_id INT, IN str_date CHAR(20) )
BEGIN

    DECLARE next_id INT DEFAULT NULL ;

    UPDATE  test
    SET     mtime = str_date
    WHERE   id    = start_id;

    SELECT parent_id FROM test WHERE id = start_id INTO next_id;

    IF next_id > 0 
    THEN 
        CALL upd_test( next_id, str_date ); 
    END IF;

END$$

DELIMITER ;

set max_sp_recursion_depth = 1024;

CALL upd_test( 6, '2001-02-03 10:11:12' );