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title: "sys.pdw_index_mappings (Transact-SQL) | Microsoft Docs"
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# sys.pdw_index_mappings (Transact-SQL)
[!INCLUDE[tsql-appliesto-xxxxxx-xxxx-asdw-pdw_md](../../includes/tsql-appliesto-xxxxxx-xxxx-asdw-pdw-md.md)]

  Maps the logical indexes to the physical name used on Compute nodes as reflected by a unique combination of **object_id** of the table holding the index and the **index_id** of a particular index within that table.  
  
|Column Name|Data Type|Description|Range|  
|-----------------|---------------|-----------------|-----------|  
|object_id|**int**|The object ID for the logical table on which this index exists. See [sys.objects &#40;Transact-SQL&#41;](../../relational-databases/system-catalog-views/sys-objects-transact-sql.md).<br /><br /> **physical_name** and **object_id** form the key for this view.||  
|index_id|**nvarchar(32)**|The ID for the index. See [sys.indexes &#40;Transact-SQL&#41;](../../relational-databases/system-catalog-views/sys-indexes-transact-sql.md).||  
|physical_name|**nvarchar(36)**|The name of the index in the databases on the Compute nodes.<br /><br /> **physical_name** and **object_id** form the key for this view.||  
  
## See Also  
 [SQL Data Warehouse and Parallel Data Warehouse Catalog Views](../../relational-databases/system-catalog-views/sql-data-warehouse-and-parallel-data-warehouse-catalog-views.md)   
 [sys.pdw_table_mappings &#40;Transact-SQL&#41;](../../relational-databases/system-catalog-views/sys-pdw-table-mappings-transact-sql.md)   
 [sys.pdw_database_mappings &#40;Transact-SQL&#41;](../../relational-databases/system-catalog-views/sys-pdw-database-mappings-transact-sql.md)