jlins_you
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feargod：
...
ActivityGroup的子activity响应back事件的顺序问题 -
hoarhoar：
谢谢你，终于解决了，我真是受够了，总是45秒钟，真是疯了。
youku 的广告必须要屏蔽 -
lilai：
...
youku 的广告必须要屏蔽 -
aijuans2：
...
youku 的广告必须要屏蔽 -
weiwo1978：
说的非常好,mark
SELECT语句执行的顺序
DBCC使用之：使用DBCC来探索ASE中的索引页及数据页结构
可能要用到的DBCC指令：
1> dbcc help(log)
2> go
log( [dbid | dbname] [,objid | objname] [,page] [,row] [,nrecords] [,type={
-1..84 }] ,printopt={ 0 | 1 | 2 | 3 } [,indid | indname] [,ptnid | ptnname] )
1> dbcc help(page)
2> go
page( dbid|dbname, pagenum [, printopt={0|1|2|3|4} [, cache={0|1} [,
logical={1|0} [, cachename | -1 ]]]] )
1> dbcc help(listoam)
2> go
listoam(dbid | dbname, objid | objname, indid | indname [, ptnid | ptnname [,
cache=[1]{ 1 | 'cache' | 0 | 'disk' } [, printopt=[1]{ 1 | 'verbose' | 0 |
'terse' } ] ] ])
我们用下述SQL来造数据：
1> create table mytest(id int primary key, col2 varchar(512)) 2> go 1> create index idx_mytest_col2 on mytest(col2) 2> go 1> insert into mytest values(1, replicate(char(convert(int, round(rand() * 26, 0) + 65) ), 512)) 2> go (1 row affected) 1> insert into mytest values(2, replicate(char(convert(int, round(rand() * 26, 0) + 65) ), 512)) 2> go (1 row affected) 1> insert into mytest select id + (select max(id) from mytest), replicate(char(convert(int, round(rand() * 26, 0) + 65) ), 512) from mytest 2> go 10 (1024 rows affected) 10 xacts:
Sysindexes系统表的关键列：
以上是准备工作，我们再看看sysindexes的列含义：
id, 表的ID，或者index所属的表的id
indid, 索引ID， 值为0时，它是一个表。为1时，为APL表的聚簇索引(cluster index)，>1时，为非聚簇索引或者是DOL表上的聚簇索引
为255时，指代的是LOB结构
doampg, 表的对象分配页上对象的页号
ioampg，索引或者LOB结构的分配页号
first, 如果indid为0或1，数据页的首页号, 如果是2到250，它为页级索引页的第一个页号
root, 如果indid为0， 并且表是未分区的APL表，它是页链的最后一页的页号。如果是1到250之间，它是索引树的根的页号。
Syspartitions的关键列：
indid, id同上。
partitionid, 索引或数据的分区ID
segment，段号
datoampage
indoampage
firstpage
rootpage
含义同上。
获取索引相关信息：
1> select id, indid, doampg, ioampg, first, root from sysindexes where id = object_id('mytest')
2> go
id indid doampg ioampg first root
----------- ------ ----------- ----------- ----------- -----------
960003420 1 0 0 0 0
960003420 2 0 0 0 0
(2 rows affected)
1> select name, indid, segment, datoampage, indoampage, firstpage, rootpage from syspartitions where id = object_id('mytest')
2> go
name
indid segment datoampage indoampage firstpage rootpage
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
------ ------- ----------- ----------- ----------- -----------
mytest_id_9600034201_960003420
1 1 968 960 969 961
idx_mytest_col2_960003420
2 1 0 872 874 873
(2 rows affected)
据此分析，索引mytest_id_9600034201_960003420是聚簇索引，首页号为969, 根页号为961.
索引idx_mytest_col2_960003420为非聚簇索引，首页号为874, 根页号为873.
表mytest总共有2048行数据，
1> select count(*) from mytest
2> go
-----------
2048
(1 row affected)
1> select pagesize(object_id('mytest'))
2> go
-----------
4096
(1 row affected)
看看对象分配页的情况：
1> dbcc listoam('iihero', 'mytest', 1)
2> go
-----------------------------------------------------------------------------
Partition id: 960003420 indid: 1 prevpg: 960 nextpg: 960
OAM pg cnt: 1 Entry cnt: 1
Row count information is not maintained for index pages.
Used pgs: 2 Unused pgs: 6
Attribute entries: 10
OAM status bits set: (0x8000 (PG_OAMPG), 0x0008 (PG_OAMATTRIB), 0x0004
(PG_OAMSORT))
LAST SCANNED OAM PAGE: 0
ALLOCATION HINTS :
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0
OAM pg # 1: 960 has the following 1 entry (allocpg:used/unused):
[ 0] 768: 2/ 6
---- End of OAM chain for partition 960003420 ----
1> dbcc listoam('iihero', 'mytest', 2)
2> go
-----------------------------------------------------------------------------
Partition id: 960003420 indid: 2 prevpg: 872 nextpg: 872
OAM pg cnt: 1 Entry cnt: 8
Row count information is not maintained for index pages.
Used pgs: 576 Unused pgs: 6
Attribute entries: 10
OAM status bits set: (0x8000 (PG_OAMPG), 0x0008 (PG_OAMATTRIB))
LAST SCANNED OAM PAGE: 0
ALLOCATION HINTS :
872 0 0 0
0 0 0 0
0 0 0 0
0 0 0
OAM pg # 1: 872 has the following 8 entries (allocpg:used/unused):
[ 0] 768: 24/ 0 1024: 88/ 0 1280: 72/ 0 1536:111/ 0
[ 4] 1792: 48/ 0 2048:104/ 0 2304:104/ 0 2560:25/ 6
---- End of OAM chain for partition 960003420 ----
以普通索引2为例，
1> dbcc page('iihero', 873, 1) 2> go Page found in Cache: default data cache. Cachelet: 1 BUFFER: Buffer header for buffer 0x22D55000 page=0x22D54000 bdnew=0x23588550 bdold=0x23588550 bhash=0x23587E00 bmass_next=0x23588310 bmass_prev=0x23596C80 bdbid=4 bvirtpg=[ 0x22D55078 vpgdevno=5 vpvpn=1746 vdisk=0x214E04C8 ] bmass_head=0x23588550 bmass_tail=0x23588550 bcache_desc=0x22D57C00 (cid=0 cache name='default data cache') bpool_desc=0x22D59BF4 bdbtable=0x20EBBC60 Mass bkeep=0 Mass bpawaited=0 Mass btripsleft=0 Mass btripsleft_orig=0 bmass_size=4096 (4K pool) bunref_cnt=0 bmass_stat=0x86001010(0x0000000080000000 (MASS_FLUSHED), 0x0000000004000000 (MASS_DONT_DISCARD), 0x0000000002000000 (MASS_WRITE_BY_HK), 0x0000000000001000 (MASS_HASHED), 0x0000000000000010 (MASS_INWASH)) bbuf_stat=0x1 (0x00000001 (BUF_PG_REF)) Buffer blpageno=873 bpg_size=4k Mass blpageno=873 Mass blocallockkeep=0 bxls_pin=0x00000000 bxls_next=0x00000000 bspid=0 bxls_flushseq=0 bxls_pinseq=0 bcurrxdes=0x00000000 Latch and the wait queue: Latch (address: 0x22D55024) latchmode: 0x0 (FREE_LATCH) latchstatus: 0x0 latchowner: -1 latchnoofowners: 0 latchwaitq: 0x00000000 latchwaitqt: 0x00000000 latchlastfileindex=0 (nofilename) latchlastlineno=0 Latch wait queue: PAGE HEADER: Page header for page 0x22D54000 pageno=873 nextpg=0 prevpg=0 ptnid=960003420 timestamp=0000 000039b3 lastrowoff=2677 level=4 indid=2 freeoff=3206 minlen=11 page status bits: 0x1000 (0x1000 (PG_OFFSET)) DATA: Offset 32 - row length=529 # varlen cols=1 Child page ID=1482 22D54020 ( 0): 01c90300 000200ca 05000011 02464646 .............FFF 22D54030 ( 16): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D54040 ( 32): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D54050 ( 48): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D54060 ( 64): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D54070 ( 80): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D54080 ( 96): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D54090 ( 112): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D540A0 ( 128): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D540B0 ( 144): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D540C0 ( 160): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D540D0 ( 176): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D540E0 ( 192): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D540F0 ( 208): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D54100 ( 224): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D54110 ( 240): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D54120 ( 256): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D54130 ( 272): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D54140 ( 288): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D54150 ( 304): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D54160 ( 320): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D54170 ( 336): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D54180 ( 352): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D54190 ( 368): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D541A0 ( 384): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D541B0 ( 400): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D541C0 ( 416): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D541D0 ( 432): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D541E0 ( 448): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D541F0 ( 464): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D54200 ( 480): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D54210 ( 496): 46464646 46464646 46464646 46464646 FFFFFFFFFFFFFFFF 22D54220 ( 512): 46464646 46464646 46464646 4602020d FFFFFFFFFFFFF... 22D54230 ( 528): 0d . Row-Offset table for variable-length columns: [<varcol number>, <offset from start of the row>, <varcol length>] [1, 13, 512] Offset 561 - row length=529 # varlen cols=1 Child page ID=2505 22D54231 ( 0): 01ca0300 000100c9 09000011 02444444 .............DDD 22D54241 ( 16): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D54251 ( 32): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D54261 ( 48): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D54271 ( 64): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D54281 ( 80): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D54291 ( 96): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D542A1 ( 112): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D542B1 ( 128): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D542C1 ( 144): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D542D1 ( 160): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D542E1 ( 176): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D542F1 ( 192): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D54301 ( 208): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D54311 ( 224): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D54321 ( 240): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D54331 ( 256): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D54341 ( 272): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D54351 ( 288): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D54361 ( 304): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D54371 ( 320): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D54381 ( 336): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D54391 ( 352): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D543A1 ( 368): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D543B1 ( 384): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D543C1 ( 400): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D543D1 ( 416): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D543E1 ( 432): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D543F1 ( 448): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D54401 ( 464): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D54411 ( 480): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D54421 ( 496): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD 22D54431 ( 512): 44444444 44444444 44444444 4402020d DDDDDDDDDDDDD... 22D54441 ( 528): 0d . Row-Offset table for variable-length columns: [<varcol number>, <offset from start of the row>, <varcol length>] [1, 13, 512] Offset 1090 - row length=529 # varlen cols=1 Child page ID=1483 22D54442 ( 0): 01cf0300 000000cb 05000011 02494949 .............III 22D54452 ( 16): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D54462 ( 32): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D54472 ( 48): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D54482 ( 64): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D54492 ( 80): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D544A2 ( 96): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D544B2 ( 112): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D544C2 ( 128): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D544D2 ( 144): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D544E2 ( 160): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D544F2 ( 176): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D54502 ( 192): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D54512 ( 208): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D54522 ( 224): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D54532 ( 240): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D54542 ( 256): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D54552 ( 272): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D54562 ( 288): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D54572 ( 304): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D54582 ( 320): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D54592 ( 336): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D545A2 ( 352): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D545B2 ( 368): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D545C2 ( 384): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D545D2 ( 400): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D545E2 ( 416): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D545F2 ( 432): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D54602 ( 448): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D54612 ( 464): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D54622 ( 480): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D54632 ( 496): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII 22D54642 ( 512): 49494949 49494949 49494949 4902020d IIIIIIIIIIIII... 22D54652 ( 528): 0d . Row-Offset table for variable-length columns: [<varcol number>, <offset from start of the row>, <varcol length>] [1, 13, 512] Offset 1619 - row length=529 # varlen cols=1 Child page ID=2586 22D54653 ( 0): 01c80400 0006001a 0a000011 024c4c4c .............LLL 22D54663 ( 16): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D54673 ( 32): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D54683 ( 48): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D54693 ( 64): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D546A3 ( 80): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D546B3 ( 96): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D546C3 ( 112): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D546D3 ( 128): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D546E3 ( 144): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D546F3 ( 160): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D54703 ( 176): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D54713 ( 192): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D54723 ( 208): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D54733 ( 224): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D54743 ( 240): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D54753 ( 256): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D54763 ( 272): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D54773 ( 288): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D54783 ( 304): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D54793 ( 320): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D547A3 ( 336): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D547B3 ( 352): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D547C3 ( 368): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D547D3 ( 384): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D547E3 ( 400): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D547F3 ( 416): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D54803 ( 432): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D54813 ( 448): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D54823 ( 464): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D54833 ( 480): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D54843 ( 496): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c4c4c4c LLLLLLLLLLLLLLLL 22D54853 ( 512): 4c4c4c4c 4c4c4c4c 4c4c4c4c 4c02020d LLLLLLLLLLLLL... 22D54863 ( 528): 0d . Row-Offset table for variable-length columns: [<varcol number>, <offset from start of the row>, <varcol length>] [1, 13, 512] Offset 2148 - row length=529 # varlen cols=1 Child page ID=1760 22D54864 ( 0): 01ca0300 000200e0 06000011 02505050 .............PPP 22D54874 ( 16): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D54884 ( 32): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D54894 ( 48): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D548A4 ( 64): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D548B4 ( 80): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D548C4 ( 96): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D548D4 ( 112): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D548E4 ( 128): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D548F4 ( 144): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D54904 ( 160): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D54914 ( 176): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D54924 ( 192): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D54934 ( 208): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D54944 ( 224): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D54954 ( 240): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D54964 ( 256): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D54974 ( 272): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D54984 ( 288): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D54994 ( 304): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D549A4 ( 320): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D549B4 ( 336): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D549C4 ( 352): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D549D4 ( 368): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D549E4 ( 384): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D549F4 ( 400): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D54A04 ( 416): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D54A14 ( 432): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D54A24 ( 448): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D54A34 ( 464): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D54A44 ( 480): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D54A54 ( 496): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP 22D54A64 ( 512): 50505050 50505050 50505050 5002020d PPPPPPPPPPPPP... 22D54A74 ( 528): 0d . Row-Offset table for variable-length columns: [<varcol number>, <offset from start of the row>, <varcol length>] [1, 13, 512] Offset 2677 - row length=529 # varlen cols=1 Child page ID=2162 22D54A75 ( 0): 011c0400 00050072 08000011 02555555 .......r.....UUU 22D54A85 ( 16): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54A95 ( 32): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54AA5 ( 48): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54AB5 ( 64): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54AC5 ( 80): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54AD5 ( 96): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54AE5 ( 112): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54AF5 ( 128): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54B05 ( 144): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54B15 ( 160): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54B25 ( 176): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54B35 ( 192): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54B45 ( 208): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54B55 ( 224): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54B65 ( 240): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54B75 ( 256): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54B85 ( 272): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54B95 ( 288): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54BA5 ( 304): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54BB5 ( 320): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54BC5 ( 336): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54BD5 ( 352): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54BE5 ( 368): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54BF5 ( 384): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54C05 ( 400): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54C15 ( 416): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54C25 ( 432): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54C35 ( 448): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54C45 ( 464): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54C55 ( 480): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54C65 ( 496): 55555555 55555555 55555555 55555555 UUUUUUUUUUUUUUUU 22D54C75 ( 512): 55555555 55555555 55555555 5502020d UUUUUUUUUUUUU... 22D54C85 ( 528): 0d . Row-Offset table for variable-length columns: [<varcol number>, <offset from start of the row>, <varcol length>] [1, 13, 512]
这里我们可以看得很清楚，
Row-Offset table for variable-length columns:
[<varcol number>, <offset from start of the row>, <varcol length>]
[1, 13, 512]
从第14个字节开始，512个字节的长度为col2的值，一下子就可以看出来了。 不再解释。
前13个字节，应该是存储着字段id的值。待分析。
我们如果接着分析1> dbcc page('iihero', 1696, 1)
就会得到它的子节点，跑到数据页上了。 Offset 32 - row length=525 # varlen cols=1 Data page RID=(1668, 2), 不再列举。
此数据页1668的内容如下：
1> dbcc page('iihero', 1668, 1)
2> go
Page found in Cache: default data cache. Cachelet: 1
BUFFER:
Buffer header for buffer 0x22D55000
page=0x22D54000 bdnew=0x235A16F0 bdold=0x235A16F0 bhash=0x235785F0
bmass_next=0x235A2AA0 bmass_prev=0x235785F0 bdbid=4
bvirtpg=[ 0x22D55078 vpgdevno=5 vpvpn=3336 vdisk=0x214E04C8 ]
bmass_head=0x235A16F0 bmass_tail=0x235A16F0
bcache_desc=0x22D57C00 (cid=0 cache name='default data cache')
bpool_desc=0x22D59BF4 bdbtable=0x20EBBC60
Mass bkeep=0 Mass bpawaited=0 Mass btripsleft=0 Mass btripsleft_orig=0
bmass_size=4096 (4K pool) bunref_cnt=0
bmass_stat=0x6001010(0x0000000004000000 (MASS_DONT_DISCARD),
0x0000000002000000 (MASS_WRITE_BY_HK), 0x0000000000001000 (MASS_HASHED),
0x0000000000000010 (MASS_INWASH))
bbuf_stat=0x1 (0x00000001 (BUF_PG_REF))
Buffer blpageno=1668 bpg_size=4k Mass blpageno=1668 Mass blocallockkeep=0
bxls_pin=0x00000000 bxls_next=0x00000000 bspid=0
bxls_flushseq=0 bxls_pinseq=0 bcurrxdes=0x00000000
Latch and the wait queue:
Latch (address: 0x22D55024)
latchmode: 0x0 (FREE_LATCH)
latchstatus: 0x0 latchowner: -1
latchnoofowners: 0
latchwaitq: 0x00000000 latchwaitqt: 0x00000000
latchlastfileindex=0 (nofilename) latchlastlineno=0
Latch wait queue:
PAGE HEADER:
Page header for page 0x22D54000
pageno=1668 nextpg=1669 prevpg=1667 ptnid=960003420 timestamp=0000 000026fc
nextrno=7 level=0 indid=0 freeoff=3700 minlen=6
page status bits: 0x101 (0x0100 (PG_ADDEND), 0x0001 (PG_DATA))
DATA:
Offset 32 - row ID=0 row length=524 # varlen cols=1
22D54020 ( 0): 01005e03 00000c02 50505050 50505050 ..^.....PPPPPPPP
22D54030 ( 16): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D54040 ( 32): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D54050 ( 48): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D54060 ( 64): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D54070 ( 80): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D54080 ( 96): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D54090 ( 112): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D540A0 ( 128): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D540B0 ( 144): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D540C0 ( 160): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D540D0 ( 176): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D540E0 ( 192): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D540F0 ( 208): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D54100 ( 224): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D54110 ( 240): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D54120 ( 256): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D54130 ( 272): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D54140 ( 288): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D54150 ( 304): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D54160 ( 320): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D54170 ( 336): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D54180 ( 352): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D54190 ( 368): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D541A0 ( 384): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D541B0 ( 400): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D541C0 ( 416): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D541D0 ( 432): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D541E0 ( 448): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D541F0 ( 464): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D54200 ( 480): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D54210 ( 496): 50505050 50505050 50505050 50505050 PPPPPPPPPPPPPPPP
22D54220 ( 512): 50505050 50505050 02020808 PPPPPPPP....
Row-Offset table for variable-length columns:
[<varcol number>, <offset from start of the row>, <varcol length>]
[1, 8, 512]
Offset 556 - row ID=1 row length=524 # varlen cols=1
22D5422C ( 0): 01015f03 00000c02 44444444 44444444 .._.....DDDDDDDD
22D5423C ( 16): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D5424C ( 32): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D5425C ( 48): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D5426C ( 64): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D5427C ( 80): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D5428C ( 96): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D5429C ( 112): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D542AC ( 128): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D542BC ( 144): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D542CC ( 160): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D542DC ( 176): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D542EC ( 192): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D542FC ( 208): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D5430C ( 224): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D5431C ( 240): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D5432C ( 256): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D5433C ( 272): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D5434C ( 288): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D5435C ( 304): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D5436C ( 320): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D5437C ( 336): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D5438C ( 352): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D5439C ( 368): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D543AC ( 384): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D543BC ( 400): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D543CC ( 416): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D543DC ( 432): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D543EC ( 448): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D543FC ( 464): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D5440C ( 480): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D5441C ( 496): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D5442C ( 512): 44444444 44444444 02020808 DDDDDDDD....
Row-Offset table for variable-length columns:
[<varcol number>, <offset from start of the row>, <varcol length>]
[1, 8, 512]
Offset 1080 - row ID=2 row length=524 # varlen cols=1
22D54438 ( 0): 01026003 00000c02 44444444 44444444 ..`.....DDDDDDDD
22D54448 ( 16): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D54458 ( 32): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D54468 ( 48): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D54478 ( 64): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D54488 ( 80): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D54498 ( 96): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D544A8 ( 112): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D544B8 ( 128): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D544C8 ( 144): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D544D8 ( 160): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D544E8 ( 176): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D544F8 ( 192): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D54508 ( 208): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D54518 ( 224): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D54528 ( 240): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D54538 ( 256): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D54548 ( 272): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D54558 ( 288): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D54568 ( 304): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D54578 ( 320): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D54588 ( 336): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D54598 ( 352): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D545A8 ( 368): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D545B8 ( 384): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D545C8 ( 400): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D545D8 ( 416): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D545E8 ( 432): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D545F8 ( 448): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D54608 ( 464): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D54618 ( 480): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D54628 ( 496): 44444444 44444444 44444444 44444444 DDDDDDDDDDDDDDDD
22D54638 ( 512): 44444444 44444444 02020808 DDDDDDDD....
Row-Offset table for variable-length columns:
[<varcol number>, <offset from start of the row>, <varcol length>]
[1, 8, 512]
Offset 1604 - row ID=3 row length=524 # varlen cols=1
22D54644 ( 0): 01036103 00000c02 45454545 45454545 ..a.....EEEEEEEE
22D54654 ( 16): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D54664 ( 32): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D54674 ( 48): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D54684 ( 64): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D54694 ( 80): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D546A4 ( 96): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D546B4 ( 112): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D546C4 ( 128): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D546D4 ( 144): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D546E4 ( 160): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D546F4 ( 176): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D54704 ( 192): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D54714 ( 208): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D54724 ( 224): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D54734 ( 240): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D54744 ( 256): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D54754 ( 272): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D54764 ( 288): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D54774 ( 304): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D54784 ( 320): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D54794 ( 336): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D547A4 ( 352): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D547B4 ( 368): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D547C4 ( 384): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D547D4 ( 400): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D547E4 ( 416): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D547F4 ( 432): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D54804 ( 448): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D54814 ( 464): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D54824 ( 480): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D54834 ( 496): 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
22D54844 ( 512): 45454545 45454545 02020808 EEEEEEEE....
Row-Offset table for variable-length columns:
[<varcol number>, <offset from start of the row>, <varcol length>]
[1, 8, 512]
Offset 2128 - row ID=4 row length=524 # varlen cols=1
22D54850 ( 0): 01046203 00000c02 54545454 54545454 ..b.....TTTTTTTT
22D54860 ( 16): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D54870 ( 32): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D54880 ( 48): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D54890 ( 64): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D548A0 ( 80): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D548B0 ( 96): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D548C0 ( 112): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D548D0 ( 128): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D548E0 ( 144): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D548F0 ( 160): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D54900 ( 176): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D54910 ( 192): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D54920 ( 208): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D54930 ( 224): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D54940 ( 240): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D54950 ( 256): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D54960 ( 272): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D54970 ( 288): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D54980 ( 304): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D54990 ( 320): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D549A0 ( 336): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D549B0 ( 352): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D549C0 ( 368): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D549D0 ( 384): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D549E0 ( 400): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D549F0 ( 416): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D54A00 ( 432): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D54A10 ( 448): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D54A20 ( 464): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D54A30 ( 480): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D54A40 ( 496): 54545454 54545454 54545454 54545454 TTTTTTTTTTTTTTTT
22D54A50 ( 512): 54545454 54545454 02020808 TTTTTTTT....
Row-Offset table for variable-length columns:
[<varcol number>, <offset from start of the row>, <varcol length>]
[1, 8, 512]
Offset 2652 - row ID=5 row length=524 # varlen cols=1
22D54A5C ( 0): 01056303 00000c02 4f4f4f4f 4f4f4f4f ..c.....OOOOOOOO
22D54A6C ( 16): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54A7C ( 32): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54A8C ( 48): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54A9C ( 64): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54AAC ( 80): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54ABC ( 96): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54ACC ( 112): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54ADC ( 128): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54AEC ( 144): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54AFC ( 160): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54B0C ( 176): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54B1C ( 192): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54B2C ( 208): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54B3C ( 224): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54B4C ( 240): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54B5C ( 256): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54B6C ( 272): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54B7C ( 288): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54B8C ( 304): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54B9C ( 320): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54BAC ( 336): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54BBC ( 352): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54BCC ( 368): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54BDC ( 384): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54BEC ( 400): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54BFC ( 416): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54C0C ( 432): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54C1C ( 448): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54C2C ( 464): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54C3C ( 480): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54C4C ( 496): 4f4f4f4f 4f4f4f4f 4f4f4f4f 4f4f4f4f OOOOOOOOOOOOOOOO
22D54C5C ( 512): 4f4f4f4f 4f4f4f4f 02020808 OOOOOOOO....
Row-Offset table for variable-length columns:
[<varcol number>, <offset from start of the row>, <varcol length>]
[1, 8, 512]
Offset 3176 - row ID=6 row length=524 # varlen cols=1
22D54C68 ( 0): 01066403 00000c02 49494949 49494949 ..d.....IIIIIIII
22D54C78 ( 16): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54C88 ( 32): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54C98 ( 48): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54CA8 ( 64): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54CB8 ( 80): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54CC8 ( 96): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54CD8 ( 112): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54CE8 ( 128): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54CF8 ( 144): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54D08 ( 160): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54D18 ( 176): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54D28 ( 192): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54D38 ( 208): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54D48 ( 224): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54D58 ( 240): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54D68 ( 256): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54D78 ( 272): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54D88 ( 288): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54D98 ( 304): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54DA8 ( 320): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54DB8 ( 336): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54DC8 ( 352): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54DD8 ( 368): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54DE8 ( 384): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54DF8 ( 400): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54E08 ( 416): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54E18 ( 432): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54E28 ( 448): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54E38 ( 464): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54E48 ( 480): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54E58 ( 496): 49494949 49494949 49494949 49494949 IIIIIIIIIIIIIIII
22D54E68 ( 512): 49494949 49494949 02020808 IIIIIIII....
Row-Offset table for variable-length columns:
[<varcol number>, <offset from start of the row>, <varcol length>]
[1, 8, 512]
OFFSET TABLE:
Row - Offset
6 (0x06) - 3176 (0x0c68), 5 (0x05) - 2652 (0x0a5c),
4 (0x04) - 2128 (0x0850), 3 (0x03) - 1604 (0x0644),
2 (0x02) - 1080 (0x0438), 1 (0x01) - 556 (0x022c),
0 (0x00) - 32 (0x0020),
这一页，总共有7行数据。00000c02应该是行长度: 524. (020c), 头4个字节，以rowid=0x03为例， 01036103，似乎是第2个字节描述的是rowid. 余下的6103，变成小端0361->dec , 变成865. 经过查询，col2值确实为EEEE(512bytes长)。那么首字节01，到底表示什么呢？
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