[ @table = ] 'table'

Is the three part name of the table for which the storage format is to be changed. table is nvarchar(776).

0 (success) or 1 (failure)

The following result set is returned to provide current and estimated table size information.

Use sp_estimated_rowsize_reduction_for_vardecimal to estimate the savings that result if you enable a table for vardecimal storage format. For instance if the average size of the row can be reduced by 40%, you can potentially reduce the size of the table by 40%. You may not receive a space savings depending on the fill factor and the size of the row. For example, if you have a row that is 8000 bytes long and you reduce its size by 40%, you can still fit only one row on a data page, resulting in no savings.

If the results of sp_estimated_rowsize_reduction_for_vardecimal indicate that the table will grow, this means that many rows in the table use nearly the entire precision of the decimal data types, and the addition of the small overhead needed for vardecimal storage format is greater than the savings from vardecimal storage format. In this rare case, do not enable vardecimal storage format.

If a table is enabled for vardecimal storage format, use sp_estimated_rowsize_reduction_for_vardecimal to estimate the average size of the row if vardecimal storage format is disabled.

Requires CONTROL permission on the table.

The following example estimates the rowsize reduction if the Production.WorkOrderRouting table in the AdventureWorks database is compressed.

USE AdventureWorks
GO
EXEC sp_estimated_rowsize_reduction_for_vardecimal 'Production.WorkOrderRouting' ;
GO

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