以 table_name 和日期作为输入并以数字作为输出的 Oracle 函数

Question

我正在尝试测试一个函数，我在其中传递一个 table 名称和日期作为输入，并获取一个数字作为 return 值。我只传递日期作为绑定变量（不能传递 table_name ）

CREATE OR REPLACE FUNCTION TABLE_TEST (reptable in varchar2, fltdate in varchar2)   RETURN NUMBER

        IS
        day_exists VARCHAR2(5 CHAR);
        BEGIN

    execute immediate
    'Select CASE WHEN max(day_i)  IS NULL THEN ''NO'' ELSE ''YES'' END FROM '|| reptable ||' WHERE 1 IN
                  (SELECT max(day_i)
                  FROM '|| reptable ||'
                  where day_i = 1 and flt_dptr_Date_d = :1)' into day_exists
                  using fltdate
          ;
            IF day_exists = 'YES' THEN
              return 1;
            END IF;

    END TABLE_TEST;

我就是这样测试的

Select TABLE_TEST('FDR_REP', '07/25/2015') from dual;

当我单独测试它们时它工作正常，即当我只通过 table_name 或只通过日期时。但由于某种原因，它显示错误不是有效月份。我不认为日期有任何问题。

这部分在我刚刚通过 table_name

时有效

CREATE OR replace FUNCTION TEST_FUNCTION (name_table IN VARCHAR2) RETURN NUMBER

        IS         

          rday NUMBER;                
  BEGIN 
   execute immediate  'select day_i 
                FROM ' || name_table || '
                WHERE day_i = 1 and rownum = 1' into rday;


   return rday;

  END TEST_FUNCTION;

Answer 1

首先尝试将您的 fltdate 转换为日期。这是您的代码的修订版：

  CREATE OR REPLACE FUNCTION TABLE_TEST (reptable in varchar2, fltdate in varchar2)   RETURN NUMBER
  IS
     day_exists VARCHAR2(5 CHAR);
  BEGIN

     execute immediate
     'Select CASE WHEN max(day_i)  IS NULL THEN ''NO'' ELSE ''YES'' END FROM '|| reptable ||' WHERE 1 IN
     (SELECT max(day_i)
     FROM '|| reptable ||'
     where day_i = 1 and flt_dptr_Date_d = TO_DATE(:1,''MM/DD/YYYY''))' into day_exists
     using fltdate
     ;
     IF day_exists = 'YES' THEN
     return 1;
     END IF;

  END TABLE_TEST;

以 table_name 和日期作为输入并以数字作为输出的 Oracle 函数

Oracle Function with table_name and date as input and Number as output

sql

oracle

function

dynamic-sql