sys-partition-functions-transact-sql.md

title	sys.partition_functions (Transact-SQL)
description	sys.partition_functions (Transact-SQL)
author	rwestMSFT
ms.author	randolphwest
ms.date	03/14/2017
ms.service	sql
ms.subservice	system-objects
ms.topic	reference
ms.custom	ignite-2025
f1_keywords	sys.partition_functions_TSQL partition_functions sys.partition_functions partition_functions_TSQL
helpviewer_keywords	sys.partition_functions catalog view
dev_langs	TSQL
monikerRange	>=aps-pdw-2016 || =azuresqldb-current || =azure-sqldw-latest || >=sql-server-2016 || >=sql-server-linux-2017 || =azuresqldb-mi-current || =fabric || =fabric-sqldb

sys.partition_functions (Transact-SQL)

[!INCLUDE sql-asdb-asdbmi-asa-pdw-fabricse-fabricdw-fabricsqldb]

Contains a row for each partition function in [!INCLUDEssNoVersion].

Column name	Data type	Description
name	sysname	Name of the partition function. Is unique within the database.
function_id	int	Partition function ID. Is unique within the database.
type	char(2)	Function type. R = Range
type_desc	nvarchar(60)	Function type. RANGE
fanout	int	Number of partitions created by the function.
boundary_value_on_right	bit	For range partitioning. 1 = Boundary value is included in the RIGHT range of the boundary. 0 = LEFT.
is_system		Applies to: [!INCLUDEssSQL11] and later. 1 = Object is used for full-text index fragments. 0 = Object is not used for full-text index fragments.
create_date	datetime	Date the function was created.
modify_date	datetime	Date the function was last modified using an ALTER statement.

Permissions

Requires membership in the public role. For more information, see Metadata Visibility Configuration.

See Also

Partition Function Catalog Views (Transact-SQL)
Catalog Views (Transact-SQL)
sys.partition_range_values (Transact-SQL)
sys.partition_parameters (Transact-SQL)