sys-pdw-nodes-partitions-transact-sql.md

title	sys.pdw_nodes_partitions (Transact-SQL)
description	sys.pdw_nodes_partitions (Transact-SQL)
author	WilliamDAssafMSFT
ms.author	wiassaf
ms.date	03/03/2017
ms.service	sql
ms.subservice	data-warehouse
ms.topic	reference
dev_langs	TSQL
monikerRange	>=aps-pdw-2016||=azure-sqldw-latest

sys.pdw_nodes_partitions (Transact-SQL)

[!INCLUDEapplies-to-version/asa-pdw]

Contains a row for each partition of all the tables, and most types of indexes in a [!INCLUDEssazuresynapse-md] database. All tables and indexes contain at least one partition, whether or not they are explicitly partitioned.

Column name	Data type	Description
partition_id	bigint	ID of the partition. Is unique within a database.
object_id	int	ID of the object to which this partition belongs. Every table or view is composed of at least one partition.
index_id	int	ID of the index within the object to which this partition belongs.
partition_number	int	1-based partition number within the owning index or heap. For [!INCLUDEssazuresynapse-md], the value of this column is 1.
hobt_id	bigint	ID of the data heap or B-tree (HoBT) that contains the rows for this partition.
rows	bigint	Approximate number of rows in this partition.
data_compression	int	Indicates the state of compression for each partition: 0 = NONE 1 = ROW 2 = PAGE 3 = COLUMNSTORE
data_compression_desc	nvarchar(60)	Indicates the state of compression for each partition. Possible values are NONE, ROW, and PAGE.
pdw_node_id	int	Unique identifier of a [!INCLUDEssazuresynapse-md] node.

Permissions

Requires CONTROL SERVER permission.

Examples: [!INCLUDEssazuresynapse-md] and [!INCLUDEssPDW]

Example A: Display rows in each partition within each distribution

Applies to: [!INCLUDEssazuresynapse-md], [!INCLUDEssPDW]

To display the number of rows in each partition within each distribution, use DBCC PDW_SHOWPARTITIONSTATS (SQL Server PDW) .

Example B: Uses system views to view rows in each partition of each distribution of a table

Applies to: [!INCLUDEssazuresynapse-md]

This query returns the number of rows in each partition of each distribution of the table myTable.

SELECT o.name, pnp.index_id, pnp.partition_id, pnp.rows,   
    pnp.data_compression_desc, pnp.pdw_node_id  
FROM sys.pdw_nodes_partitions AS pnp  
JOIN sys.pdw_nodes_tables AS NTables  
    ON pnp.object_id = NTables.object_id  
AND pnp.pdw_node_id = NTables.pdw_node_id  
JOIN sys.pdw_table_mappings AS TMap  
    ON NTables.name = TMap.physical_name 
    AND substring(TMap.physical_name,40, 10) = pnp.distribution_id 
JOIN sys.objects AS o  
    ON TMap.object_id = o.object_id  
WHERE o.name = 'myTable'  
ORDER BY o.name, pnp.index_id, pnp.partition_id;  

See Also

Azure Synapse Analytics and Parallel Data Warehouse Catalog Views