从引用游标中获取批量收集时出现不一致的数据类型错误

Posted 2023-03-28

【中文标题】从引用游标中获取批量收集时出现不一致的数据类型错误

【英文标题】：Getting inconsistent data type error while fetching bulk collect from ref cursor

【发布时间】：2017-09-26 09:59:17

【问题描述】：

这是我的代码

create or replace function test_func(c in int) return number as

 v_stmt varchar2(4000);
 v_insert varchar2(4000);
k_col_name varchar2(50);
v_gs_tab_name varchar2(100);
min_k_val varchar2(50);
max_k_val varchar2(50);
mid_k_val varchar2(50);
nxt_mid_k_val varchar2(50);
type l_cursor_type is ref cursor;
 l_cursor l_cursor_type;
 type t_source is table of rec_source;
  m_source t_source:=t_source();
 dat_typ varchar2(50);

 begin

 select DISTINCT data_type INTO dat_typ from all_tab_cols where column_name 
 in (SELECT cols.column_name FROM all_constraints cons, all_cons_columns 
 cols
 WHERE cons.constraint_type='P' and cols.table_name=+v_tab_name AND 
  CONS.OWNER='SOURCE'
   AND cons.constraint_name = cols.constraint_name AND cons.owner = 
   cols.owner);

     dml_str:='create or replace type dwbi_land.rec_source as object (id '||dat_typ||')';
      dbms_output.put_line(dml_str);
         execute immediate dml_str;
   dml_str:='create or replace type dwbi_land.t_source as table of rec_source';
   dbms_output.put_line(dml_str);
    execute immediate dml_str;

    begin 
       select 'select * from '||v_gs_tab_name
         ||' where '||k_col_name||' between ('||min_k_val||') and 
       ('||mid_k_val||')'
       into v_stmt
       from dual;

       dbms_output.put_line(v_stmt);

        execute immediate v_stmt bulk collect into m_source;

        v_insert:='insert into '||v_tab_name||' values '||v_stmt||''; 

        dbms_output.put_line(v_insert);

       open l_cursor for v_stmt;
        loop
        fetch l_cursor bulk collect into m_source;
        exit when l_cursor%NOTFOUND;
        m_source.extend;
       forall i in 1..m_source.count 
      execute immediate v_insert using m_source(i).id; 
    commit; 
    exit when m_source.count=0; 
  end loop; 

  select 'select * from '||v_gs_tab_name
         ||' where '||k_col_name||' between ('||nxt_mid_k_val||') and ('||max_k_val||')'
  into v_stmt
  from dual;

  dbms_output.put_line(v_stmt);

  v_insert:='insert into '||v_tab_name||' values '||v_stmt||'';

   dbms_output.put_line(v_insert);

  open l_cursor for v_stmt using 1; 
  loop 
    fetch l_cursor bulk collect into m_source;
    forall i in 1..m_source.count
      execute immediate v_insert using m_source(i).id;
    commit;
    exit when m_source.count=0;
  end loop;
end;

在获取 l_cursor 批量收集到 m_source 部分我得到 Ora-00932：不一致的数据类型：预期 - 得到 - 欢迎任何建议

之前我无法发布整个代码，现在我发布了整个代码

【参考方案1】：

您缺少变量的声明，但似乎您可以将其简化为：

begin 
  v_stmt := 'insert into ' || v_tab_name 
            || ' select id from '||v_gs_tab_name
            || ' where '||k_col_name||' between :1 and :2;

  dbms_output.put_line(v_stmt);

  execute immediate v_stmt using min_k_val, mid_k_val;
  execute immediate v_stmt using nxt_mid_k_val, max_k_val;
END;

【参考方案2】：

你能扩展你的编码吗... 是 v_stmt 的数据类型吗？

示例代码：

begin
v_stmt:= 'select * from ''||v_gs_tab_name||'' where ''||k_col_name||'' between (''||nxt_mid_k_val||'') and (''||max_k_val||'')'' into v_stmt from dual'
Dbms_output.put_line(v_stmt);
V_insert:='insert into '||v_tab_name||' values '||v_stmt||'';
dbms_output.put_line(v_insert);

    open l_cursor for v_stmt using 1; loop fetch l_cursor bulk collect into m_source;

    forall i in 1..m_source.count

    execute immediate v_insert using m_source(i).id;

    commit;

    exit when m_source.count=0;

    end loop;

end;

【讨论】：

每当您使用动态查询时，您都应该将其分配到变量中，以便分配，以便 --- v_stmt:= 'select * from ''||v_gs_tab_name||'' where ' '||k_col_name||'' 在 (''||nxt_mid_k_val||'') 和 (''||max_k_val||'')'' 之间从 dual' Dbms_output.put_line(v_stmt) 到 v_stmt； v_insert:='插入到'||v_tab_name||'值'||v_stmt||''； dbms_output.put_line(v_insert);* 希望对你有所帮助。