select tablespace_name,segment_type,owner,segment_name from dba_extents where file_id=4 and 234413between block_id AND block_id + blocks - 1;

alter index indexname rebuild

alter session SET EVENTS '10231 trace name context forever,level 10';create table tab_new as select * from tab;rename tab to tab_bak;rename tab_new to new;alter index indexname rebuild;
alter session SET EVENTS '10231 trace name context off';

select tablespace_name,segment_type,owner,segment_name from dba_extents where file_id=4 and 234413between block_id AND block_id + blocks - 1;

select table_name, column_name from dba_lobs where segment_name = 'SYS_LOB0000119493C00006$$' and owner = 'EZOFFCIE';

create table bad_rows (row_id ROWID,oracle_error_code number);
set concat off
set serveroutput on

declaren number;error_code number;bad_rows number := 0;ora1578 EXCEPTION;ora600 EXCEPTION;PRAGMA EXCEPTION_INIT(ora1578, -1578);PRAGMA EXCEPTION_INIT(ora600, -600);beginfor cursor_lob in (select rowid rid, &&lob_column from &&table_owner.&table_with_lob) loopbeginn:=dbms_lob.instr(cursor_lob.&&lob_column,hextoraw('889911')) ;exceptionwhen ora1578 thenbad_rows := bad_rows + 1;insert into bad_rows values(cursor_lob.rid,1578);commit;when ora600 thenbad_rows := bad_rows + 1;insert into bad_rows values(cursor_lob.rid,600);commit;when others thenerror_code:=SQLCODE;bad_rows := bad_rows + 1;insert into bad_rows values(cursor_lob.rid,error_code);commit;   end;end loop;dbms_output.put_line('Total Rows identified with errors in LOB column: '||bad_rows);end;/

select * from bad_rows;

set concat off
update EZOFFICE.OA_MAILINTERIOR set MAILCONTENT= empty_clob() where rowid in (select row_id from bad_rows);

alter table EZOFFICE.OA_MAILINTERIOR move LOB (MAILCONTENT) store as (tablespace sysnux);

alter index 索引名称 rebuild;