THIS TOPIC APPLIES TO: SQL Server Azure SQL Database Azure SQL Data Warehouse Parallel Data Warehouse
Returns the file identification (ID) number for the given logical file name in the current database.
This feature will be removed in a future version of Microsoft SQL Server. Avoid using this feature in new development work, and plan to modify applications that currently use this feature. Use FILE_IDEX instead.
Is an expression of type sysname that represents the name of the file for which to return the file ID.
file_name corresponds to the logical file name displayed in the name column in the sys.master_files or sys.database_files catalog views.
In SQL Server, the file identification number assigned to full-text catalogs is greater than 32767. Because the return type of the FILE_ID function is smallint, this function cannot be used for full-text files. Use FILE_IDEX instead.