Question

所以我尝试将此代码更改为动态SQL

SELECT  LISTAGG(accounting_dept || '-'||REPLACE(full_desc,'''',''''''), '; ') WITHIN GROUP (ORDER BY accounting_dept)  FROM table

EXCUTE

12121-President''S Office

我改为动态sql

EXECUTE IMMEDIATE
    ' SELECT  LISTAGG(accounting_dept || ''-''||REPLACE(full_desc,'''''',''''''''), ''; '') WITHIN GROUP (ORDER BY accounting_dept)  FROM table '

INTO v_task;

错误是ORA-00907：缺少右括号

问题是这部分REPLACE（full_desc，'''''，''''''''，

如何在没有引发错误的情况下更改为动态sql？

Answer 1

如果将语句放入变量中，则可以在执行之前输出它：

set serveroutput on

declare
  v_stmt varchar2(2000);
  v_task varchar2(2000);
begin
  v_stmt := 'SELECT  LISTAGG(accounting_dept || ''-''||REPLACE(full_desc,'''''',''''''''), ''; '') WITHIN GROUP (ORDER BY accounting_dept)  FROM some_table';
  dbms_output.put_line(v_stmt );
  execute immediate v_stmt into v_task;
end;
/

显示它尝试执行的语句，然后显示错误：

SELECT  LISTAGG(accounting_dept || '-'||REPLACE(full_desc,''',''''), '; ') WITHIN GROUP (ORDER BY accounting_dept)  FROM some_table

Error report -
ORA-00911: invalid character
ORA-06512: at line 7

如果在SQL Developer中手动运行该生成的语句，您将获得ORA-00907：缺少右括号;不完全确定你是如何或为什么动态地得到这个错误 - 它应该首先抱怨分号，使用ORA-00911。

您可以看到generate语句与您开始使用的原始静态语句不匹配。你需要有更多的转义报价：

declare
  v_stmt varchar2(2000);
  v_task varchar2(2000);
begin
  v_stmt := 'SELECT  LISTAGG(accounting_dept || ''-''||REPLACE(full_desc,'''''''',''''''''''''), ''; '') WITHIN GROUP (ORDER BY accounting_dept)  FROM some_table';
  dbms_output.put_line(v_stmt );
  execute immediate v_stmt into v_task;
end;
/

SELECT  LISTAGG(accounting_dept || '-'||REPLACE(full_desc,'''',''''''), '; ') WITHIN GROUP (ORDER BY accounting_dept)  FROM some_table

PL/SQL procedure successfully completed.

但正如Tony Andrews所建议的那样，而是使用替代引用机制。

这不是你甚至需要动态SQL;这样做：

declare
  v_task varchar2(2000);
begin
  SELECT LISTAGG(accounting_dept || '-'||REPLACE(full_desc,'''',''''''), '; ')
    WITHIN GROUP (ORDER BY accounting_dept)
  INTO v_task
  FROM tableinto v_task;
end;
/

Answer 2

如果将整个select转换为字符串，请使用如下所示的Q引号：

q'[SELECT  LISTAGG(accounting_dept || '-'||REPLACE(full_desc,'''',''''''), '; ') WITHIN GROUP (ORDER BY accounting_dept)  FROM table]'

如何使用REPLACE函数更改为动态sql转义

2 个答案: