我试图在Oracle中创建一个存储函数来计算表行...我想让表名动态,所以我把它作为参数传递,存储的函数代码看起来像这样
create type tes_jml_obj is object(jumlah integer);
create type tes_jml_table is table of tes_jml_obj;
create or replace function jumlahBaris(namatabel varchar)
return tes_jml_table
is
tabel tes_jml_table := tes_jml_table();
begin
for r in (execute immediate 'select count(*) as jumlah from' || namatabel)
loop
tabel.extend;
tabel(1) := tes_jml_obj(r.jumlah);
end loop;
return tabel;
end;
但是当我执行它时,它会返回错误。我错过了什么吗?这是动态获取表行的正确方法吗?
答案 0 :(得分:3)
FOR r IN 1..COUNT()
。在纠正您的代码之后,这就是它的样子:
SQL> CREATE OR REPLACE TYPE TES_JML_OBJ IS OBJECT(JUMLAH NUMBER)
2 /
Type created.
SQL> CREATE OR REPLACE TYPE TES_JML_TABLE IS TABLE OF TES_JML_OBJ
2 /
Type created.
SQL> CREATE OR REPLACE
2 FUNCTION jumlahBaris(
3 namatabel VARCHAR2)
4 RETURN tes_jml_table
5 IS
6 TABEL TES_JML_TABLE := TES_JML_TABLE();
7 cnt NUMBER;
8 BEGIN
9 EXECUTE IMMEDIATE 'select count(*) as jumlah from ' || NAMATABEL INTO CNT;
10 FOR R IN 1..CNT
11 LOOP
12 TABEL.EXTEND;
13 TABEL(R) := TES_JML_OBJ(R);
14 dbms_output.put_line(TES_JML_OBJ(R).jumlah);
15 END LOOP;
16 RETURN tabel;
17 END;
18 /
Function created.
SQL> SHO ERR
No errors.
所以,函数编译时没有错误。让我们执行,然后看输出:
SQL> SET SERVEROUTPUT ON
SQL> SELECT JUMLAHBARIS('EMP') FROM DUAL;
JUMLAHBARIS('EMP')(JUMLAH)
--------------------------------------------------------------------------------
TES_JML_TABLE(TES_JML_OBJ(1), TES_JML_OBJ(2), TES_JML_OBJ(3), TES_JML_OBJ(4), TE
S_JML_OBJ(5), TES_JML_OBJ(6), TES_JML_OBJ(7), TES_JML_OBJ(8), TES_JML_OBJ(9), TE
S_JML_OBJ(10), TES_JML_OBJ(11), TES_JML_OBJ(12), TES_JML_OBJ(13), TES_JML_OBJ(14
))
1
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5
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14
SQL>
答案 1 :(得分:2)
from
关键字之后没有空格。尝试这样的事情:
create or replace function jumlahBaris(namatabel varchar)
return tes_jml_table
is
tabel tes_jml_table := tes_jml_table();
the_count integer;
the_sql varchar(100);
begin
the_sql := 'select count(*) as jumlah from ' || namatabel;
execute immediate the_sql INTO the_count;
if the_count IS NOT NULL THEN
tabel.extend;
tabel(1) := tes_jml_obj(the_count);
end if;
return tabel;
end;