如何在 Postgres Procedure 中使用 IN 和 INOUT 值调用过程

Question

我已经在 AWS SCT（模式转换工具）的帮助下将 oracle 数据库迁移到 RDS AWS 上的 Aurora Postgresql。 Oracle 中的一些包以以下格式转换为 postgres。

CREATE OR REPLACE PROCEDURE miptd."pkg_rpt$strptst"(i_molo text,INOUT o_cursor refcursor)
LANGUAGE 'plpgsql'
AS $BODY$
DECLARE

    o_cursor$ATTRIBUTES aws_oracle_data.TCursorAttributes;
    
BEGIN   
    o_cursor := NULL;
    OPEN o_cursor FOR
    
    EXECUTE CONCAT_WS('','select count(ID) From 
                        (select DISTINCT D.ID, B.CSS_DISTRICT, B.RDA, C.TECH_TYPE, C.FORECAST_DATE, D.SITE_TYPE
                        FROM
                        ALB.VIEWSIRPT B, 
                        ALB.VIEWWRDATA C,
                        ALB.', i_molo, ' D
                        WHERE
                        (D.CSR = C.CSR) AND (D.CUSTOMER = C.CUSTOMER)
                        AND (D.CSR = B.CSR ) AND (D.CUSTOMER = B.CUSTOMER )  )a ');

    o_cursor$ATTRIBUTES := ROW (TRUE, 0, NULL, NULL);
END;
$BODY$;

不知道游标在 postgres 中的使用我如何调用程序。？我在哪里可以通过调用过程看到我的结果值？可以将其转换为函数吗？

Answer 1

你应该使用一个函数，你应该避免SQL注入：

CREATE function some_name(i_molo text) RETURNS bigint
   LANGUAGE plpgsql AS
$$BEGIN
   RETURN EXECUTE
      format('SELECT count(ID)
              FROM (SELECT DISTINCT D.ID,
                                    B.CSS_DISTRICT,
                                    B.RDA, C.TECH_TYPE,
                                    C.FORECAST_DATE,
                                    D.SITE_TYPE
                    FROM ALB.%I D
                       JOIN ALB.VIEWWRDATA C
                          ON D.CUSTOMER = C.CUSTOMER AND D.CSR = C.CSR
                       JOIN ALB.VIEWSIRPT B
                          ON D.CUSTOMER = B.CUSTOMER AND D.CSR = B.CSR
                   ) AS a',
              i_molo);
END;$$;

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