尝试使用单个insert-from-select语句执行此操作:
INSERT INTO test_clob_performance (col1 , col2 , col3 , col4 , col5 ,col6 , col7 , col8,clob1 , clob2 , clob3 , clob4) SELECT col1 , col2 , col3 , col4 , col5 ,col6 , col7 , col8, some_func_for_clob(col1), some_func_for_clob(col2), some_func_for_clob(col3), some_func_for_clob(col4) FROM (SELECT rownum as col1, rownum+1 col2, rownum+1 col3, rownum+4 col4, rownum+5 col5,rownum+6 col6, rownum+7 col7, rownum+8 col8 from dual connect by rownum < 10000) ;