Question

我在这里遇到简单的PL / SQL问题。我将表格定义如下：

TYPE tr_GatheredData IS RECORD(
BS_ID          number,
CUSTOMER_NAME  varchar2(200),
MONTH          varchar2(30),
YEAR           number,
LEAKAGE        number);

TYPE tt_GatheredData IS TABLE OF tr_GatheredData;

然后，我尝试启动一个像这样的变量：

results := tt_GatheredData(1, 'lol', 'omg', 2, 3);

一切对我来说都是正确的，但我明白了

错误（8,16）：PLS-00306：调用“ TT_GATHEREDDATA”时参数的数量或类型错误

每次赞美。你们能告诉我问题在哪里吗？

Answer 1

Oracle 18c qualified expression：

DECLARE
  TYPE tr_GatheredData IS RECORD(
     BS_ID          number,
     CUSTOMER_NAME  varchar2(200),
     MONTH          varchar2(30),
     YEAR           number,
     LEAKAGE        number);

  TYPE tt_GatheredData IS TABLE OF tr_GatheredData;
  results tt_GatheredData;
BEGIN
   results := tt_GatheredData(tr_GatheredData(1, 'lol', 'omg', 2, 3));
   DBMS_OUTPUT.PUT_LINE(results(1).Customer_name);
END;
//

以前的版本：

DECLARE
TYPE tr_GatheredData IS RECORD(
BS_ID          number,
CUSTOMER_NAME  varchar2(200),
MONTH          varchar2(30),
YEAR           number,
LEAKAGE        number);
TYPE tt_GatheredData IS TABLE OF tr_GatheredData;
  results tt_GatheredData;
  t tr_GatheredData ;
BEGIN
   t.BS_ID := 1;
   t.CUSTOMER_NAME := 'lol';
   t.MONTH := 'omg';
   t.YEAR := 2;
   t.LEAKAGE := 3;
   results := tt_GatheredData(t);  -- element has to be record type

   DBMS_OUTPUT.PUT_LINE(results(1).Customer_name);
END;
//

db<>fiddle demo

Answer 2

//Get the date System.DateTime a = System.DateTime.Now; //Converts it to string string b = a.ToString("yyyy-MM-dd HH:mm:ss"); System.Console.WriteLine(b); //Convert to Byte Array byte[] c = System.Text.Encoding.ASCII.GetBytes(b); //Convert every byte as hex and join it string d = ""; foreach (byte e in c) d += string.Format("{0:x2}", e); //Show the result System.Console.WriteLine(d);是tt_GatheredData条记录的集合，因此您需要传递一组记录，而不是tr_GatheredData。

正如Lukasz的回答所述，Oracle 18c之前的PL / SQL记录类型只是简单的多值变量，因此，如果您想要方便的构造函数，则必须编写自己的构造函数，否则声明每个(1, 'lol', 'omg', 2, 3)记录并明确为其分配值。

集合类型的确包含隐式构造函数，或者您可以一次显式分配一个元素。

这是一种使用独立（18c之前的版本）记录构造函数来一次创建包含多个元素的集合的方法：

tr_GatheredData

输出：

declare
    type tr_GatheredData is record
    ( bs_id          number
    , customer_name  varchar2(200)
    , month          varchar2(30)
    , year           number
    , leakage        number );

    type tt_GatheredData is table of tr_GatheredData;
    results tt_GatheredData;

    function new_gathereddata
        ( p_bs_id          number
        , p_customer_name  varchar2
        , p_month          varchar2
        , p_year           number
        , p_leakage        number )
        return tr_GatheredData
    is
        r tr_GatheredData;
    begin
        r.bs_id          := p_bs_id;
        r.customer_name  := p_customer_name;
        r.month          := p_month;
        r.year           := p_year;
        r.leakage        := p_leakage;

        return r;
    end new_gathereddata;

begin
    results :=
        tt_GatheredData
        ( new_gathereddata(1, 'aaa', 'January',  1066, 10)
        , new_gathereddata(2, 'bbb', 'February', 1588, 15)
        , new_gathereddata(3, 'ccc', 'March',    1789, 20) );

    dbms_output.put_line('Collection contains ' || results.count || ' records.');
    dbms_output.put_line('results(3).year = ' || results(3).year);
end;

PLS-00306的未知原因：错误的参数数量或类型

2 个答案: