如何在Oracle PL/SQL过程的开始部分之后声明游标 [英] How to declare a cursor after the begin section of an Oracle PL/SQL procedure
问题描述
我是Oracle PL/SQL的新手.我试图编写一个过程,在该过程中,我将首先从表中的列中获取数据并分配给变量.然后,对于结果中的每一行/值,我将执行另一个查询并遍历此新查询的结果,并执行各种插入和更新.之后,我将返回外循环并继续执行该序列.我的尝试如下:
I am new in Oracle PL/SQL. I trying to write a procedure where I would first get data from a column in a table and assign to a variable. Then for each row/value in the result, I perform another query and loop through the result of this new query and perform various inserts and updates. After which I would go back to the outer loop and continue the sequence. My attempt is as follows:
CREATE OR REPLACE PROCEDURE CMSADMIN.Proc_RFC_UPD_NEW_MRSP
IS
ecode NUMBER;
emesg VARCHAR2(200);
cursor y IS (select distinct cod_unicom FCODE from RFC_UPD_NEW_MRSP_POOL);
BEGIN
for t in y loop
cursor X IS (
SELECT DISTINCT s.NIF PREMISE,a.COD_UNICOM READING, A.COD_LECT_AREA AREA
FROM SUMCON s, LECT_AREAS a
WHERE a.COD_UNICOM = t.FCODE
AND s.NUM_SUM IN (select num_sum from RFC_UPD_NEW_MRSP_POOL where cod_unicom = t.FCODE)
);
for met in x loop
/* Store record trace*/
INSERT into RFC_UPD_NEW_MRSP(NIF, COD_UNICOM,COD_LECT_AREA, USUARIO, F_ACTUAL, PROGRAMA)
values (met.PREMISE, met.READING, met.AREA, USER, SYSDATE,'RFC_MRSP_FPL');
UPDATE fincas_per_lect fp
SET
FP.NUM_MRSP = MET.READING,
fp.AOL_FIN=0,
fp.NUM_ITIN =0,
fp.USUARIO = user, fp.PROGRAMA = 'RFC_MRSP_FPL', fp.F_ACTUAL = sysdate
WHERE Fp.NIF=met.PREMISE;
UPDATE apmedida_ap fp
SET
FP.NUM_MRSP = MET.READING,
fp.USUARIO = user, fp.PROGRAMA = 'RFC_MRSP_FPL', fp.F_ACTUAL = sysdate
WHERE Fp.NIF_apa = met.PREMISE;
UPDATE FINCAS fp
SET AREA_LECT = MET.AREA,
fp.USUARIO = user, fp.PROGRAMA = 'RFC_MRSP_FPL', fp.F_ACTUAL = sysdate
WHERE NIF = met.PREMISE;
end loop;
end loop;
COMMIT;
dbms_output.put_line('The procedure Proc_RFC_UPD_NEW_MRSP executed successfully');
EXCEPTION
WHEN OTHERS THEN
ecode := SQLCODE;
emesg := SQLERRM;
dbms_output.put_line('The procedure Proc_RFC_UPD_NEW_MRSP fail with folowing error '|| TO_CHAR(ecode) || ' and error message: ' || emesg);
NULL;
end Proc_RFC_UPD_NEW_MRSP;
如您所见,在BEGIN
内的for循环之后,我还有另一个光标.可以吗?该脚本无法正常工作.可能是什么问题呢?感谢任何帮助
As you can see I have another cursor after the for loop inside BEGIN
. Is this allowed? The script doesn't work as expected. What could be the problem? Appreciate any help
推荐答案
为此,您需要声明一个新块:
To do this, you'd need to declare a new block:
for t in y loop
DECLARE
cursor X IS (
SELECT DISTINCT s.NIF PREMISE,a.COD_UNICOM READING, A.COD_LECT_AREA AREA
FROM SUMCON s, LECT_AREAS a
WHERE a.COD_UNICOM = t.FCODE
AND s.NUM_SUM IN (select num_sum from RFC_UPD_NEW_MRSP_POOL where cod_unicom = t.FCODE)
);
BEGIN
for met in x loop
...
end loop;
END;
但是,我不太明白为什么不能只将光标与带有参数定义的光标y一起声明:
However, I don't quite see why you can't just declare this cursor along with cursor y, defined with a parameter:
cursor X (p_FCODE RFC_UPD_NEW_MRSP_POOL.cod_unicom%TYPE) IS (
SELECT DISTINCT s.NIF PREMISE,a.COD_UNICOM READING, A.COD_LECT_AREA AREA
FROM SUMCON s, LECT_AREAS a
WHERE a.COD_UNICOM = p_FCODE
AND s.NUM_SUM IN (select num_sum from RFC_UPD_NEW_MRSP_POOL where cod_unicom = p_FCODE)
);
然后可以这样引用光标:
You could then reference the cursor thusly:
FOR met IN x(t.FCODE) LOOP
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