July 7, 2014 at 6:31 am
The code below does the following:
1) Creates a database play_partition in C:\TEMP
2) Creates two identical partitioned tables play_table and archive_play_table
3) Switches play_table partition 1 to archive_play_table partition 1
4) Creates a new unpartitioned table temp_table with the same structure as play_table on the same filegroup as play_table partition 2
5) Switches play_table_partition 2 to temp_table
6) Tries to switch temp_table back to play_table partition 2 and fails with
Msg 4982, Level 16, State 1, Line 64
ALTER TABLE SWITCH statement failed. Check constraints of source table
'play_partition.dbo.temp_table' allow values that are not allowed by
range defined by partition 2 on target table
'play_partition.dbo.play_table'.
Why does it fail?
I am using SQL Server 2014 (Enterprise Edition Trial).
Regards,
Colin Daley
http://www.colindaley.com/translator
/* Playing with partitioned tables */
USE master;
GO
DROP DATABASE play_partition;
GO
CREATE DATABASE play_partition
ON PRIMARY(
NAME = play_partition
, FILENAME = 'C:\TEMP\play_partition.mdf')
,FILEGROUP play_fg1(
NAME = play_fg1
,FILENAME = 'C:\TEMP\play_fg1f1.ndf')
,FILEGROUP play_fg2(
NAME = play_fg2f1
,FILENAME = 'C:\TEMP\play_fg2f1.ndf');
GO
USE play_partition;
CREATE PARTITION FUNCTION play_range(INT)
AS RANGE LEFT FOR VALUES(3);
-- Partition scheme
CREATE PARTITION SCHEME play_scheme
AS PARTITION play_range TO (play_fg1, play_fg2);
-- Partitioned tables
CREATE TABLE dbo.play_table(
c1 INT NOT NULL CONSTRAINT PK_play_table_c1 PRIMARY KEY CLUSTERED
)
ON play_scheme(c1);
CREATE TABLE dbo.archive_play_table(
c1 INT NOT NULL CONSTRAINT PK_archive_play_table_c1 PRIMARY KEY CLUSTERED
)
ON play_scheme(c1);
-- partition 1 = {1, 2, 3}, partiion 2 = {4, 5, 6}
INSERT INTO dbo.play_table(c1) VALUES (1), (2), (3), (4), (5), (6);
-- move partition 1 from play_table to archive play_table
ALTER TABLE dbo.play_table
SWITCH PARTITION 1 to dbo.archive_play_table PARTITION 1;
-- create empty table with same structure as dbo.play_table
SELECT * INTO dbo.temp_table FROM dbo.play_table WHERE 1 = 0;
-- move temp_table to filegroup play_fg2
ALTER TABLE dbo.temp_table
ADD CONSTRAINT PK_temp_table_c1 PRIMARY KEY CLUSTERED(c1) ON play_fg2;
-- move contents of play_table to temp_table, which is not partitioned
-- but is in the same filegroup
ALTER TABLE dbo.play_table
SWITCH PARTITION 2 TO temp_table;
PRINT 'Switched from partitioned table to non-partitioned table';
-- move data back to partitioned play_table from unpartitioned temp_table
-- FAIL
ALTER TABLE dbo.temp_table
SWITCH TO play_table partition 2;
PRINT 'Switched from non-partitioned table to partitioned table';
SELECT 'archive_play_table' as table_name, t1.c1
FROM dbo.archive_play_table AS t1
UNION ALL
SELECT 'temp_table' AS table_name, t1.c1
FROM dbo.temp_table as t1
ORDER BY 1, 2;
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