In our environment, we have several partitioned tables that share a single partition scheme (with a range right, date partition function). Our objective is to keep X months of data in the partitioned tables (where X is determined by environment). In the last article, I covered removal of the "trailing" edge of the partition.
This script covers adding a new file group to the "leading" edge of the partition. It adds the new file group, the new files and then splits the partition function with the new date. You can specify the number of files to create in the file group (from 1 to 9). The format of the logical file name will be FACT_YYYY_M[MM]. The physical file name will be similar, prefixed with the database name.
This was my first real foray into PowerShell. Some of the concepts were difficult to get my head around, but once I had the basics, it was actually pretty straightforward.
This has only been tested on SQL 2005 (not SQL 2008).
The Partition Function is defined as:
/****** Object: PartitionFunction [pf_FACT_DATA_DATE] Script Date: 12/17/2009 12:23:54 ******/
CREATE PARTITION FUNCTION [pf_FACT_DATA_DATE](datetime) AS RANGE RIGHT FOR
N'2007-04-01T00:00:00', N'2007-05-01T00:00:00', N'2007-06-01T00:00:00', N'2007-07-01T00:00:00', N'2007-08-01T00:00:00', N'2007-09-01T00:00:00', N'2007-10-01T00:00:00', N'2007-11-01T00:00:00', N'2007-12-01T00:00:00',
N'2008-01-01T00:00:00', N'2008-02-01T00:00:00', N'2008-03-01T00:00:00', N'2008-04-01T00:00:00', N'2008-05-01T00:00:00', N'2008-06-01T00:00:00', N'2008-07-01T00:00:00', N'2008-08-01T00:00:00', N'2008-09-01T00:00:00', N'2008-10-01T00:00:00', N'2008-11-01T00:00:00', N'2008-12-01T00:00:00',
N'2009-01-01T00:00:00', N'2009-02-01T00:00:00', N'2009-03-01T00:00:00', N'2009-04-01T00:00:00', N'2009-05-01T00:00:00', N'2009-06-01T00:00:00', N'2009-07-01T00:00:00', N'2009-08-01T00:00:00', N'2009-09-01T00:00:00', N'2009-10-01T00:00:00', N'2009-11-01T00:00:00', N'2009-12-01T00:00:00')
The Partition Scheme is define as:
/****** Object: PartitionScheme [ps_FACT_DATA_DATE] Script Date: 12/17/2009 12:24:53 ******/
CREATE PARTITION SCHEME [ps_FACT_DATA_DATE] AS PARTITION [pf_FACT_DATA_DATE] TO (
[FACT_EMPTY], [FACT_2007_M04], [FACT_2007_M05], [FACT_2007_M06], [FACT_2007_M07], [FACT_2007_M08], [FACT_2007_M09], [FACT_2007_M10], [FACT_2007_M11], [FACT_2007_M12],
[FACT_2008_M01], [FACT_2008_M02], [FACT_2008_M03], [FACT_2008_M04], [FACT_2008_M05], [FACT_2008_M06], [FACT_2008_M07], [FACT_2008_M08], [FACT_2008_M09], [FACT_2008_M10], [FACT_2008_M11], [FACT_2008_M12],
[FACT_2009_M01], [FACT_2009_M02], [FACT_2009_M03], [FACT_2009_M04], [FACT_2009_M05], [FACT_2009_M06], [FACT_2009_M07], [FACT_2009_M08], [FACT_2009_M09], [FACT_2009_M10], [FACT_2009_M11], [FACT_2009_M12])