dblink_build_sql_delete。我需要能够删除具有 <= 条件的数据

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'"

我无法删除此处的记录。我还需要知道如何添加“<=”条件，还需要传递一个参数。我的代码将是这样的，我将选择 max(colum_value) 到一个变量中并将其传递给上面的查询，并且应该能够像下面那样删除。

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

感谢您的帮助。

Answer 1

为什么不只是 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)

dblink_build_sql_delete。我需要能够删除具有 <= 条件的数据

dblink_build_sql_delete . I need to be able to delete the data with <= condition

postgresql

postgresql-9.4