PostgreSQL相当于MERGE语句中的Oracle LOG ERRORS子句

Question

我试图将下面的oracle MERGE语句转换为PostgreSQL中的等效语句。

Oracle查询：

MERGE INTO dest a
    USING source b
    ON (a.id = b.id)
  WHEN MATCHED THEN
    UPDATE SET a.code        = b.code,
               a.description = b.description
  WHEN NOT MATCHED THEN
    INSERT (id, code, description)
    VALUES (b.id, b.code, b.description)
  LOG ERRORS INTO err$_dest ('MERGE') REJECT LIMIT UNLIMITED;

上述合并声明的等价物：

INSERT INTO dest (id, code, description) 
              SELECT b.id, b.code, b.description
              FROM source b           
ON CONFLICT (id) DO UPDATE SET 
code        = EXCLUDED.code,
description = EXCLUDED.description;

有人可以解释如何找到这个子句的等价物

LOG ERRORS INTO err$_dest ('MERGE') REJECT LIMIT UNLIMITED;