oracle的show_space存储过程

Tom大师写的show_space的其中一个版本. 常用于存储空间的分析.

create or replace procedure show_space(p_segname   in varchar2,
                                       p_owner     in varchar2 default user,
                                       p_type      in varchar2 default 'TABLE',
                                       p_partition in varchar2 default null) as
  l_free_blks          number;
  l_total_blocks       number;
  l_total_bytes        number;
  l_unused_blocks      number;
  l_unused_bytes       number;
  l_lastusedextfileid  number;
  l_lastusedextblockid number;
  l_last_used_block    number;
  l_segment_space_mgmt varchar2(255);
  l_unformatted_blocks number;
  l_unformatted_bytes  number;
  l_fs1_blocks         number;
  l_fs1_bytes          number;
  l_fs2_blocks         number;
  l_fs2_bytes          number;
  l_fs3_blocks         number;
  l_fs3_bytes          number;
  l_fs4_blocks         number;
  l_fs4_bytes          number;
  l_full_blocks        number;
  l_full_bytes         number;

  procedure p(p_label in varchar2, p_num in number) is
  begin
    dbms_output.put_line(rpad(p_label, 40, '.') ||
                         to_char(p_num, '999,999,999,999'));
  end;
begin
  execute immediate 'select ts.segment_space_management from dba_segments seg, dba_tablespaces ts where seg.segment_name = :p_segname and (:p_partition is null or seg.partition_name = :p_partition) and seg.owner = :p_owner and seg.tablespace_name=ts.tablespace_name'
    into l_segment_space_mgmt
    using p_segname, p_partition, p_partition, p_owner;

  --     exception
  --             when too_many_rows
  --             then
  --             dbms_output.put_line('This must be a partitioned table,use p_partition => ');
  --             return;
  --     end;

  l_segment_space_mgmt := 'AUTO';

  if l_segment_space_mgmt = 'AUTO' then
    dbms_space.space_usage(p_owner,
                           p_segname,
                           p_type,
                           l_unformatted_blocks,
                           l_unformatted_bytes,
                           l_fs1_blocks,
                           l_fs1_bytes,
                           l_fs2_blocks,
                           l_fs2_bytes,
                           l_fs3_blocks,
                           l_fs3_bytes,
                           l_fs4_blocks,
                           l_fs4_bytes,
                           l_full_blocks,
                           l_full_bytes,
                           p_partition);
  
    p('Unformatted Blocks  ', l_unformatted_blocks);
    p('FS1 Blocks (0-25)   ', l_fs1_blocks);
    p('FS2 Blocks (25-50)  ', l_fs2_blocks);
    p('FS3 Blocks (50-75)  ', l_fs3_blocks);
    p('FS4 Blocks (75-100) ', l_fs4_blocks);
    p('Full Blocks         ', l_full_blocks);
  else
    dbms_space.free_blocks(segment_owner     => p_owner,
                           segment_name      => p_segname,
                           segment_type      => p_type,
                           freelist_group_id => 0,
                           free_blks         => l_free_blks);
  end if;

  dbms_space.unused_space(segment_owner             => p_owner,
                          segment_name              => p_segname,
                          segment_type              => p_type,
                          partition_name            => p_partition,
                          total_blocks              => l_total_blocks,
                          total_bytes               => l_total_bytes,
                          unused_blocks             => l_unused_blocks,
                          unused_bytes              => l_unused_bytes,
                          last_used_extent_file_id  => l_lastusedextfileid,
                          last_used_extent_block_id => l_lastusedextblockid,
                          last_used_block           => l_last_used_block);

  p('Total Blocks ', l_total_blocks);
  p('Total Bytes  ', l_total_bytes);
  p('Total MBytes ', trunc(l_total_bytes / 1024 / 1024));
  p('Unused Blocks', l_unused_blocks);
  p('Unused Bytes ', l_unused_bytes);
  p('Last Used Ext FileId', l_lastusedextfileid);
  p('Last Used Ext BlockId', l_lastusedextblockid);
  p('Last Used Block', l_last_used_block);
end;