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我想創建PL/SQL函數接收表名和列名和條件,然後從表中返回其名稱在參數中傳遞的一個值。PL SQL動態SQL
我所創建的函數是這樣的:
create or replace function get_dynamic
(tbl_name nvarchar2,col_name nvarchar2 ,cond nvarchar2)
return nvarchar2 is
res nvarchar2(30);
code varchar2(500):='begin select :col_name into :res from :tbl_name where :cond; end;';
begin
EXECUTE IMMEDIATE code using in col_name , out res , in tbl_name, in cond;
return res;
end;
,當我使用此代碼調用該函數沒有任何問題但創建的函數:
begin
DBMS_OUTPUT.PUT_LINE(get_dynamic('EMPLOYEES', 'FIRST_NAME', 'EMPLOYEE_ID=100'));
end;
我得到了自己的錯誤:
ERROR at line 1:
ORA-06550: line 1, column 51:
PL/SQL: ORA-00903: invalid table name ORA-06550: line 1, column 7:
PL/SQL: SQL Statement ignored ORA-06512: at "HR.GET_DYNAMIC", line 7 ORA-06512: at line 2
雖然表名,列na我和條件都是正確的。
幫助請!..