plpgsql函数内部的事务 [英] Transaction inside a plpgsql function

问题描述

我已经编写了下面提到的自动化功能，该功能根据一些规则调用了一些其他功能.该函数给了我想要的结果，但是我面临的问题是，在内部处理了每个函数之后，它没有提交数据.一旦main函数完成，就提交全部数据.我想做一个内部事务，应该在内部函数执行完成时提交数据.我尝试在每个PERFORM语句之后给出一个COMMIT语句，但是遇到一个错误，提示无法在PL/pgSQL中开始/结束事务".

I have written a function for automation, mentioned below, which calls some other functions based on some rules. The function is giving me the desired results, but the problem that I am facing is that it does not commit the data after each of the function is processed internally. Once the main function gets completed only then it commits the entire data. I want to do a internal transaction which should commit the data as and when the internal function execution get completed. I tried giving a COMMIT statement after each of the PERFORM statements, but I got an error saying 'cannot begin/end transactions in PL/pgSQL'.

任何人都可以建议我如何在函数内进行事务处理.

Can anyone suggest how do I go about doing a transaction inside a function.

CREATE OR REPLACE FUNCTION ccdb.fn_automation_for_updation()
  RETURNS void AS
$BODY$

DECLARE 
sec_col refcursor;
cnt integer;
sec_code ccdb.update_qtable%ROWTYPE;
new_cnt integer;

BEGIN

SELECT COUNT(*)
INTO cnt
FROM ccdb.update_qtable
WHERE status_flag IN (-1,1);

OPEN sec_col FOR
    SELECT * FROM ccdb.update_qtable WHERE status_flag IN (-1,1);

FOR i IN 1..cnt
LOOP

    FETCH sec_col INTO sec_code;

        PERFORM ccdb.o_dtr_update(sec_code.section_code);

        PERFORM ccdb.o_consumer_update_for_update(sec_code.section_code);

        PERFORM ccdb.o_consumer_update_for_insert(sec_code.section_code);

        PERFORM ccdb.o_bills_update_for_update(sec_code.section_code);

        PERFORM ccdb.o_bills_update_for_insert(sec_code.section_code);

        PERFORM ccdb.o_payments_update_for_update_new(sec_code.section_code);

        PERFORM ccdb.o_payments_update_for_insert(sec_code.section_code);

        PERFORM ccdb.o_payments_map_update_for_update(sec_code.section_code);

        PERFORM ccdb.o_payments_map_update_for_insert(sec_code.section_code);

        SELECT COUNT(*) INTO new_cnt FROM ccdb.update_qtable WHERE status_flag IN (-1,1);

        IF new_cnt > cnt
        THEN
            CLOSE sec_col;

            OPEN sec_col FOR
                SELECT * FROM ccdb.update_table WHERE status_flag IN (-1,1);

        cnt := new_cnt;

        END IF;

END LOOP;

CLOSE sec_col;

END;
$BODY$
  LANGUAGE plpgsql VOLATILE
  COST 100;

推荐答案

您无法在PostgreSQL中执行自主事务-它的功能不支持它.

You cannot perform autonomous transactions in PostgreSQL - its functions don't support it.

您必须使用DBLink.

You must use DBLink.

请参阅:

• 在执行postgreql函数时将记录提交到表中
• PostgreSQL函数是否具有事务性?
• 在PostgreSQL存储过程中提交

• Committing Records into the table while executing a postgreql Function
• Are PostgreSQL functions transactional?
• COMMIT in PostgreSQL stored procedure

(标记为CW，因为我关闭了帖子)

(Marked CW because I closed the post)

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