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;
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 ;

调用方法：
SQL> create table t1 as select * from dba_objects ;
SQL> exec dbms_stats.gather_table_stats(user,'T1') ;
SQL> set serverout on ;
SQL> exec show_space('T1') ;
Total Blocks ........................... 2,944
Total Bytes ........................... 24,117,248
Total MBytes ........................... 23
Unused Blocks........................... 123
Unused Bytes ........................... 1,007,616
Last Used Ext FileId.................... 1
Last Used Ext BlockId................... 107,904
Last Used Block......................... 5
PL/SQL 过程已成功完成。

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TOM大神编写的show_space函数代码

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