Étant donné les éléments suivants
-- table ddl
create table dbo.f_word(
sentence_id int NULL,
sentence_word_id int NULL,
word_id int NULL,
lemma_id int NULL,
source_id int NULL,
part_of_speech_id int NULL,
person_id int NULL,
gender_id int NULL,
number_id int NULL,
tense_id int NULL,
voice_id int NULL,
mood_id int NULL,
case_id int NULL,
degree_id int NULL,
citation nvarchar(100) NULL
);
-- create partition function
create partition function pf_f_word_source_id (int)
as range left for values
(
1,2,3,4,5,6,7,8,9,10,11,12,13,14,
15,16,17,18,19,20,21,22,23
);
-- create the partition scheme
create partition scheme ps_f_word as partition pf_f_word_source_id to
(
[primary],[primary],[primary],[primary],[primary],[primary],[primary],[primary],[primary],
[primary],[primary],[primary],[primary],[primary],[primary],[primary],[primary],[primary],
[primary],[primary],[primary],[primary],[primary],[primary]
);
-- partition the index
create unique clustered index cix_fword on dbo.f_word
(
source_id,
sentence_id,
sentence_word_id,
word_id,
lemma_id,
part_of_speech_id,
person_id,
gender_id,
number_id,
tense_id,
voice_id,
mood_id,
case_id,
degree_id
)
on ps_f_word (source_id);
-- swapin table ddl
create table dbo.f_word_swapin(
sentence_id int NULL,
sentence_word_id int NULL,
word_id int NULL,
lemma_id int NULL,
source_id int NULL,
part_of_speech_id int NULL,
person_id int NULL,
gender_id int NULL,
number_id int NULL,
tense_id int NULL,
voice_id int NULL,
mood_id int NULL,
case_id int NULL,
degree_id int NULL,
citation nvarchar(100) NULL
) on [primary];
-- create the same index on the swapin table
create unique clustered index cix_fword_swapin on dbo.f_word_swapin
(
source_id,
sentence_id,
sentence_word_id,
word_id,
lemma_id,
part_of_speech_id,
person_id,
gender_id,
number_id,
tense_id,
voice_id,
mood_id,
case_id,
degree_id
);
-- add check constraints WITH CHECK
ALTER TABLE dbo.f_word_swapin
WITH CHECK
ADD CONSTRAINT ck_f_word_swapin_lb
CHECK ( source_id > 12);
ALTER TABLE dbo.f_word_swapin
WITH CHECK
ADD CONSTRAINT ck_f_word_swapin_ub
CHECK ( source_id <= 13);
Ensuite, déplacez les données:
-- switch data OUT of the partitioned table
ALTER TABLE dbo.f_word
SWITCH PARTITION 13 TO dbo.f_word_swapin;
-- attempt to switch data back IN
ALTER TABLE dbo.f_word_swapin
SWITCH TO dbo.f_word PARTITION 13;
Ci-dessous se trouve le DDL "Script Table As ... CREATE" juste pour vérifier les mêmes structures de table.
/****** Object: Table [dbo].[f_word_swapin] Script Date: 9/10/2014 10:01:01 AM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[f_word_swapin](
[sentence_id] [int] NULL,
[sentence_word_id] [int] NULL,
[word_id] [int] NULL,
[lemma_id] [int] NULL,
[source_id] [int] NULL,
[part_of_speech_id] [int] NULL,
[person_id] [int] NULL,
[gender_id] [int] NULL,
[number_id] [int] NULL,
[tense_id] [int] NULL,
[voice_id] [int] NULL,
[mood_id] [int] NULL,
[case_id] [int] NULL,
[degree_id] [int] NULL,
[citation] [nvarchar](100) NULL
) ON [PRIMARY]
/****** Object: Table [dbo].[f_word] Script Date: 9/10/2014 10:09:43 AM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[f_word](
[sentence_id] [int] NULL,
[sentence_word_id] [int] NULL,
[word_id] [int] NULL,
[lemma_id] [int] NULL,
[source_id] [int] NULL,
[part_of_speech_id] [int] NULL,
[person_id] [int] NULL,
[gender_id] [int] NULL,
[number_id] [int] NULL,
[tense_id] [int] NULL,
[voice_id] [int] NULL,
[mood_id] [int] NULL,
[case_id] [int] NULL,
[degree_id] [int] NULL,
[citation] [nvarchar](100) NULL
)
GO
SWITCHing OUT fonctionne très bien. SWITCHing IN produit l'erreur suivante:
Msg 4972, niveau 16, état 1, ligne 1 L'instruction ALTER TABLE SWITCH a échoué. Vérifier les contraintes ou la fonction de partition de la table source 'greek.dbo.f_word_swapin' autorise les valeurs qui ne sont pas autorisées par les contraintes de vérification ou la fonction de partition sur la table cible 'greek.dbo.f_word'.
Fonctionnement:
select target_partition_id = $PARTITION.pf_f_word_source_id(source_id),
*
from dbo.f_word_swapin;
vérifie que toutes les données doivent retourner dans la partition 13.
Je suis vraiment nouveau dans le partitionnement, donc je suis sûr que je fais les choses de manière incorrecte, je ne sais pas ce que c'est.