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sys.fn_cdc_map_lsn_to_time (Transact-SQL)

Applies To: SQL Server 2014, SQL Server 2016 Preview

Topic Status: Some information in this topic is preview and subject to change in future releases. Preview information describes new features or changes to existing features in Microsoft SQL Server 2016 Community Technology Preview 2 (CTP2).

Returns the date and time value from the tran_end_time column in the cdc.lsn_time_mapping system table for the specified log sequence number (LSN). You can use this function to systematically map LSN ranges to date ranges in a change table.

Applies to: SQL Server (SQL Server 2008 through current version).

Topic link icon Transact-SQL Syntax Conventions

sys.fn_cdc_map_lsn_to_time ( lsn_value )


Is the LSN value to match against. lsn_value is binary(10).

This function can be used to determine the time that a change was committed based upon the __$start_lsn value returned in the row of change data.

Requires membership in the public role.

The following example uses the function sys.fn_cdc_map_lsn_to_time to determine the commit time associated with the last change processed in the specified LSN interval for the HumanResources_Employee capture instance.

USE AdventureWorks2012;
DECLARE @max_lsn binary(10);
SELECT @max_lsn = MAX(__$start_lsn)
FROM cdc.fn_cdc_get_all_changes_HumanResources_Employee(@from_lsn, @to_lsn, 'all');
SELECT sys.fn_cdc_map_lsn_to_time(@max_lsn);
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