dblink_build_sql_delete。我需要能夠使用<=條件刪除數據

Question

SELECT xyz.* 
FROM PUBLIC.DBLINK ('dbname=LiveDB port=5432 host=127.0.0.1 user=postgres 
password=root','SELECT dblink_build_sql_delete(''"folderstatus"'', ''1'', 1, 
''{"1"}'')') 
as xyz (id int); 

ERROR: invalid input syntax for integer: "DELETE FROM folderstatuslu WHERE 
id = '1'" 

我無法刪除此處的記錄。我還需要知道如何添加「< =」條件並且還需要傳遞參數。 我的代碼是這樣的，我會選擇max（colum_value）到一個變量中，並將它傳遞給上面的查詢，並且應該能夠像下面一樣刪除。

DELETE FROM folderstatuslu WHERE id <= '1' --> (in the place of 1, I will 
pass a variable.) 

感謝您的幫助。

Answer 1

爲什麼不DBLINK和格式？..

t=# create table so43 (i int); 
CREATE TABLE 
t=# insert into so43 select 1; 
INSERT 0 1 
t=# select * from dblink('dbname = t',format('delete from so43 where i <= %s',1)) as row(result text); 
    result 
---------- 
DELETE 1 
(1 row)