Question

我在plsql中写道：

w_table    USER_TAB_COLS.TABLE_NAME%TYPE  :='T481INPUTRIGADOC' ;

cursor selecttable is

select cols.*
FROM USER_TAB_COLS cols 
JOIN USER_TABLES tabs ON cols.TABLE_NAME = tabs.TABLE_NAME
WHERE 1=1
AND cols.COLUMN_NAME LIKE '%IDANAGPROPRIETARIO%' --Dovrei prenedere ogni i-esimo elemento della lista
ORDER BY cols.TABLE_NAME, cols.COLUMN_ID;


BEGIN
    tmpVar := 0;

    w_esitoElaborazione:='OK';
    w_descrizioneErrore:='';

    FOR REC IN selecttable LOOP
        w_cnt_record := w_cnt_record+1;
        w_table := REC.TABLE_NAME;
        w_col := REC.COLUMN_NAME;

        select w_col into a from w_table;

    end loop

但问题出在select查询中，因为输出中写有

[错误] ORA-00942（76:30）：PL / SQL：ORA-00942：表或视图不存在

Answer 1

在形成整个quire字符串后，您已使用EXECUTE IMMEDIATE进行SQL调用动态。

 FOR REC IN selecttable LOOP
        w_cnt_record := w_cnt_record+1;
        w_table := REC.TABLE_NAME;
        w_col := REC.COLUMN_NAME;

        EXECUTE IMMEDIATE 'select '||w_col||' from '||w_table INTO a;

end loop

从表中选择表格（子查询）

1 个答案: