Oracle 11g R2 延遲段建立

bkjia@LINUXIDC11> create table seg_test( x int primary key, y varchar2(20));

Table created.

bkjia@LINUXIDC11> select owner,header_file,header_block,bytes,blocks,extents from dba_segments where segment_name = 'SEG_TEST';

no rows selected ---沒有初始化是資料， 所以還沒有段

bkjia@LINUXIDC11> insert into seg_test values(1,'bkjia');

1 row created.

bkjia@LINUXIDC11> commit;

Commit complete.

bkjia@LINUXIDC11> select owner,header_file,header_block,bytes,blocks,extents from dba_segments where segment_name = 'SEG_TEST';

OWNER                          HEADER_FILE HEADER_BLOCK      BYTES    BLOCKS    EXTENTS
------------------------------ -----------      ------------      ---------- ---------- ----------
bkjia                                    4                  57858            65536          8          1