sysindexes (T-SQL)

Contains one row for each index and table in the database. This table is stored in each database. This same table can be used to identify clustered indexes and non-clustered indexes the clustered index always has the indid = 1 and a non-clustered index will have an indid > 1

Column name	Data type	Description
id	int	ID of table (for indid = 0 or 255). Otherwise, ID of table to which the index belongs.
status	int	Internal system-status information:
		1 = Cancel command if attempt to insert
		duplicate key.
		2 = Unique index.
		4 = Cancel command if attempt to insert
		duplicate row.
		16 = Clustered index.
		64 = Index allows duplicate rows.
		2048 = Index used to enforce PRIMARY KEY
		constraint.
		4096 = Index used to enforce UNIQUE constraint.
first	binary(6)	Pointer to the first or root page.
indid	smallint	ID of index:
		1 = Clustered index.
		>1 = Nonclustered.
		255 = Entry for tables that have text or image
		data.
root	binary(6)	For indid >= 1 and <>root is the pointer to the root page. For indid = 0 or indid = 255, root is the pointer to the last page.
minlen	smallint	Minimum size of a row.
keycnt	smallint	Number of keys.
groupid	smallint	Filegroup ID on which the object was created.
dpages	int	For indid = 0 or indid = 1, dpages is the count of data pages used. For indid=255, it is set to 0. Otherwise, it is the count of index pages used.
reserved	int	For indid = 0 or indid = 1, reserved is the count of pages allocated for all indexes and table data. For indid = 255, reserved is a count of the pages allocated for text or image data. Otherwise, it is the count of pages allocated for the index.
used	int	For indid = 0 or indid = 1, used is the count of the total pages used for all index and table data. For indid = 255. used is a count of the pages used for text or image data. Otherwise, it is the count of pages used for the index.
rowcnt	binary(8)	Data-level rowcount based on indid = 0 and indid = 1, and the value is repeated for indid >1. For indid = 255, rowcnt is set to 0.
rowmodctr	int	Counts the total number of inserted, deleted, or updated rows since the last time statistics were updated for the table.
soid	tinyint	Sort order ID that the index was created with. 0, if there is no character data in the keys.
csid	tinyint	Character set ID that the index was created with. 0, if there is no character data in the keys.
xmaxlen	smallint	Maximum size of a row.
maxirow	smallint	Maximum size of a nonleaf index row.
OrigFillFactor	tinyint	Original fillfactor value used when the index was created. This value is not maintained; however, it can be helpful if you need to re-create an index and do not remember what fillfactor was used.
reserved1	tinyint	Reserved.
reserved2	int	Reserved.
FirstIAM	binary(6)	Reserved.
impid	smallint	Reserved. Index implementation flag.
lockflags	smallint	Used to constrain the considered lock granularities for an index. For example, a lookup table that is essentially read-only could be set up to do only table level locking to minimize locking cost.
pgmodctr	int	Used to track the number of pages that have changed in an index.
keys	varbinary(816)	List of the column IDs of the columns that make up the index key.
name	sysname	Name of table (for indid = 0 or 255). Otherwise, name of index.
statblob	image	Statistics BLOB.
maxlen	int	Reserved.
rows	int	Data-level rowcount based on indid = 0 and indid = 1, and the value is repeated for indid >1. For indid = 255, rows is set to 0. Provided for backward compatibility.