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 sysindexes view schema

Author  Topic 

Jude_Aj
Starting Member

22 Posts

Posted - 2009-06-10 : 08:54:02
hi,
The schema for sysindexes in SQL server 2005 is :

CREATE VIEW sys.sysindexes AS
SELECT id,
status = convert(int,
case indid when 1 then 16 else 0 end -- (is_clustered * 16)
+ (status & 8)/4 -- IS_IND_UNIQUE (is_unique * 2)
+ (status & 4)/4 -- IS_IND_DPKEYS (ignore_dup_key * 1)
+ (status & 32)*64 -- IS_IND_PRIMARY (is_primary_key * 2048)
+ (status & 64)*64 -- IS_IND_UNIQUE_CO (is_unique_constraint * 4096)
+ (status & 16)*16 -- IS_IND_PADINDEX (is_padded * 256)
+ (status & 256)/8 -- IS_IND_ITWINDEX (is_hypothetical * 32)
+ (1-(status & 1))*96 -- IS_INDEX (IND80_CREATE_STATS|IND80_HYPOTHETICAL)
+ (status & 8192)*1024 -- IS_STATS_AUTO_CRT (auto_created * 0x800000)
+ (status & 16384)*1024), -- IS_STATS_NORECOMP (no_recompute * 0x1000000)
first = case when i.rowset > 0 then p.first end,
indid = convert(smallint, indid),
root = case when i.rowset > 0 then p.root end,
minlen = convert(smallint, case when status & 1 = 0 then 0 else indexproperty(id, name, 'minlen') end),
keycnt = convert(smallint, indexproperty(id, name, 'keycnt80')),
groupid = convert(smallint, case when dataspace < 32768 then dataspace end),
dpages = convert(int, case when status & 1 = 0 then 0 else p.data_pages end),
reserved = convert(int, case when status & 1 = 0 then 0 else p.total_pages end),
used = convert(int, case when status & 1 = 0 then 0 else p.used_pages end),
rowcnt = convert(bigint, case when status & 1 = 0 then 0 else p.rows end),
rowmodctr = convert(int, indexproperty(id, name, 'rowmodcnt80')),
reserved3 = convert(tinyint, 0),
reserved4 = convert(tinyint, 0),
xmaxlen = convert(smallint, case when status & 1 = 0 then 0 else indexproperty(id, name, 'maxlen') end),
p.maxirow,
OrigFillFactor = convert(tinyint, (status & 1)*fillfact), -- fill_factor
StatVersion = convert(tinyint, 0),
reserved2 = convert(int, 0),
FirstIAM = case when i.rowset > 0 then p.FirstIAM end,
impid = convert(smallint, 0),
lockflags = convert(smallint, (status & 512)/512 + (status & 1024)/512), -- no_row_locks + no_page_locks*2
pgmodctr = convert(int, 0),
keys = convert(varbinary(1088), null),
name = name,
statblob = convert (image, null),
maxlen = convert(int, 8000),
rows = convert(int, case when status & 1 = 0 then 0 else 0x7FFFFFFF & p.rows end)
FROM sys.sysidxstats i OUTER APPLY OpenRowset(TABLE INDEXPROP, id, indid, rowset) p
WHERE indid < 32000
AND has_access('CO', id) = 1


here i fail to understand

OpenRowset(TABLE INDEXPROP, id, indid, rowset) p

and

FirstIAM = case when i.rowset > 0 then p.FirstIAM end,

in the above query.

can anybody help with this?
   

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