title	sys.dm_db_xtp_merge_requests (Transact-SQL) \| Microsoft Docs
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ms.date	02/01/2017
ms.prod	sql
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ms.technology	table-view-index
ms.topic	conceptual
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author	MightyPen
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sys.dm_db_xtp_merge_requests (Transact-SQL)

Tracks database merge requests. The merge request may have been generated by SQL Server or the request could have been made by a user with sys.sp_xtp_merge_checkpoint_files (Transact-SQL).

Note

This dynamic management view (DMV), sys.dm_db_xtp_merge_requests, exists until Microsoft SQL Server 2014.

But starting with SQL Server 2016 this DMV no longer applies.

Columns in the report

Column name	Data type	Description
request_state	tinyint	Status of the merge request: 0 = requested 1 = pending 2 = installed 3 = abandoned
request_state_desc	nvarchar(60)	Meanings for the current state of the request: Requested - a merge request exists. Pending - the merge is being processing. Installed - the merge is complete. Abandoned - the merge could not complete, perhaps due to lack of storage.
destination_file_id	GUID	The unique identifier of the destination file for the merge of the Source files.
lower_bound_tsn	bigint	The minimum timestamp for the target merge file. The lowest transaction timestamp of all the source files to be merged.
upper_bound_tsn	bigint	The maximum timestamp for the target merge file. The highest transaction timestamp of all the source files to be merged.
collection_tsn	bigint	The timestamp at which the current row can be collected. A row in the Installed state is removed when checkpoint_tsn is greater than collection_tsn. A row in the Abandoned state is removed when checkpoint_tsn is less than collection_tsn.
checkpoint_tsn	bigint	The time that the checkpoint started. Any deletes done by transactions with a timestamp lower than this are accounted for in the new data file. The remaining deletes are moved to the target delta file.
sourcenumber_file_id	GUID	Up to 16 internal file ids that uniquely identify the source files in the merge.

Requires VIEW DATABASE STATE permission on the current database.