show_space.sql 来自TOM

-- -----------------------------------------------------------------------------------

-- Author       : Tom Kyte

-- Description  : Displays free and unused space for the specified object.

-- Call Syntax  : EXEC Show_Space('Tablename');

-- Requirements : SET SERVEROUTPUT ON

-- Last Modified: June 22, 2010

-- This enhance version has all the fixes for ASSM, LMT, partitions etc (Oracle version 10gr2 +)

-- -----------------------------------------------------------------------------------

set define off

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 )

-- this procedure uses authid current user so it can query DBA_*

-- views using privileges from a ROLE and so it can be installed

-- once per database, instead of once per user that wanted to use it

authid current_user

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;

    -- inline procedure to print out numbers nicely formatted

    -- with a simple label

    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

  -- this query is executed dynamically in order to allow this procedure

  -- to be created by a user who has access to DBA_SEGMENTS/TABLESPACES

  -- via a role as is customary.

  -- NOTE: at runtime, the invoker MUST have access to these two

  -- views!

  -- this query determines if the object is a ASSM object or not

  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.segment_type = :p_type

             and seg.tablespace_name = ts.tablespace_name'

            into l_segment_space_mgmt

           using p_segname, p_partition, p_partition, p_owner, p_type;

  exception

      when too_many_rows then

         dbms_output.put_line

         ( 'This must be a partitioned table, use p_partition => ');

         return;

  end;

  -- if the object is in an ASSM tablespace, we must use this API

  -- call to get space information, else we use the FREE_BLOCKS

  -- API for the user managed segments

  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);

    p( 'Free Blocks', l_free_blks );

 end if;

 -- and then the unused space API call to get the rest of the

 -- information

 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;

/

set define on

            When the table is in the same schema.

S             SET SERVEROUTPUT ON

   exec show_space ('EMP99')

             Example: When the table is in the different schema.

             SET SERVEROUTPUT ON

exec show_space ('EMP33' , 'MOID');

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