从 from 子句的列中获取表名

2021-12-24 00:00:00 sql database oracle plsql procedure

我有一个视图 t，其中有一列用于表名，另一列具有 where 子句条件.

I have a view t with me which has a column for table name and another column which has where clause condition.

    id| name|table_in| where_clause

    1 | Sam | t1 | age = 22

    2 | John| t2 | age = 23 and sex = 'male'

等等...

现在，我已将记录放入游标中，并且我想运行每个查询.

Now, I have put the records in a cursor and I want to run each query. 

    create or replace procedure create_cursor 
    is

    CURSOR v_records is
    select * from t ;

    begin

    FOR temp IN v_records LOOP
        INSERT INTO myTable (id, name)
        select temp.id, temp.name 
        from temp.table where temp.where_clause;

        END LOOP;


    end;
    /

myTable 是另一个表，我想在其中放置记录以备下次使用.

myTable is another table in which I want to put the records for next purpose.

推荐答案

@Akshay,

请在下面找到代码以供参考.

Please find the code below for your reference. 

Create or replace procedure create_cursor is
l_statement varchar2(32767);
cursor v_records is
  select * from t;
begin
for temp in v_records
loop
  l_statement := 'INSERT INTO myTable (id, name) select '||temp.id||','
   ||temp.name|| ' from ' || temp.table1 
   || ' where ' || temp.where_clause;

  execute immediate l_statement;
  end loop;
end;
/

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