Sql 由于检查约束,Alter table switch语句失败
我有一个场景,将平面文件加载到3个暂存表中,然后切换到分区表 当我尝试从暂存表切换到分区表时,我得到了以下错误。你能帮忙吗 以下是文件组名称Sql 由于检查约束,Alter table switch语句失败,sql,sql-server-2008-r2,database-partitioning,Sql,Sql Server 2008 R2,Database Partitioning,我有一个场景,将平面文件加载到3个暂存表中,然后切换到分区表 当我尝试从暂存表切换到分区表时,我得到了以下错误。你能帮忙吗 以下是文件组名称 PRIMARY FG1 FG2 FG3 FG4 这是分区模式 CREATE PARTITION FUNCTION PAR_FN (bigint) AS RANGE LEFT FOR VALUES (1,2,3,4) CREATE PARTITION SCHEME PAR_SCHEMA AS PARTITION PAR_FN TO ( FG1, FG2,
PRIMARY
FG1
FG2
FG3
FG4
这是分区模式
CREATE PARTITION FUNCTION PAR_FN (bigint) AS RANGE LEFT FOR VALUES (1,2,3,4)
CREATE PARTITION SCHEME PAR_SCHEMA AS PARTITION PAR_FN TO (
FG1, FG2, FG3, FG4, PRIMARY
)
CREATE TABLE TEMP1
(O_ORDERKEY bigint NOT NULL,
O_CUSTKEY int NOT NULL)
ON PAR_SCHEMA (O_ORDERKEY)
CREATE TABLE TEMP2
(O_ORDERKEY bigint NOT NULL,
O_CUSTKEY int NOT NULL)
ON PAR_SCHEMA (O_ORDERKEY)
CREATE TABLE TEMP3
(O_ORDERKEY bigint not null,
O_CUSTKEY int not null)
ON PAR_SCHEMA (O_ORDERKEY)
create table TEMP4
(O_ORDERKEY bigint NOT NULL,
O_CUSTKEY int NOT NULL)
ON PAR_SCHEMA (O_ORDERKEY)
ALTER TABLE TEMP1 WITH CHECK ADD CONSTRAINT check_TEMP1
CHECK (O_ORDERKEY <=N'1')
ALTER TABLE TEMP2 WITH CHECK ADD CONSTRAINT check_TEMP2
CHECK (O_ORDERKEY >N'1' AND O_ORDERKEY <=N'2')
ALTER TABLE TEMP3 WITH CHECK ADD CONSTRAINT check_TEMP3
CHECK (O_ORDERKEY >N'2' AND O_ORDERKEY <=N'3')
ALTER TABLE TEMP4 WITH CHECK ADD CONSTRAINT check_TEMP4
CHECK (O_ORDERKEY >N'3' AND O_ORDERKEY <=N'4')
主表和暂存表之间的唯一区别是,暂存表在
O_ORDERKEY
上具有默认值。(即1表示临时1,2表示临时2等)要在这些表之间切换数据的定义必须完全相同()。与表定义的任何偏差都将阻止切换数据
切换时不会触发任何处理(这就是切换如此有用的原因),并且数据必须仍然符合所有约束
遵守分区切换条件的唯一方法是使用完全相同的DDL脚本生成两个表。只有表的名称及其约束和索引的名称必须不同。您忘了用数据库引擎对此进行标记。它是sql server 2008r2
ALTER TABLE TEMP1 SWITCH TO MAIN PARTITION 1;
ALTER TABLE TEMP2 SWITCH TO MAIN PARTITION 2;
ALTER TABLE TEMP3 SWITCH TO MAIN PARTITION 3;
ALTER TABLE TEMP4 SWITCH TO MAIN PARTITION 4;