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Dynamic columns

In Lindorm SQL 2.6.8 and later versions,you can use the method shown in the following statement to specify hex strings to avoid confusion between ordinary strings and hex strings.UPSERT INTO t_dynamic(p1,c4)VALUES(3,x'ef...

ListFileUpload-获取文件上传的列表

Expires=1765526467&OSSAccessKeyId=STS.NZP89ErN4A5BMuFMSovQjripY&Signature=eRjLGooo1EQvDyMphUS%2FQH5nt38%3D&response-content-disposition=attachment&security-token=CAIS6wN1q6Ft5B2yfSjIr5nlc4Pxn5EV9vepT1P3qVM6et5Gnazbuzz2...

Locality

ID|STORAGE_INST_ID|DB|GROUP|PHY_DB|MOVABLE|+-+-+-+-+-+-+|0|polardbx-ng28-dn-0|db1|DB1_P00000_GROUP|db1_p00000|1|1|polardbx-ng28-dn-1|db1|DB1_P00001_GROUP|db1_p00001|1|2|polardbx-ng28-dn-2|db1|DB1_P00002_GROUP|db1_p00002|1|...

通过LOCALITY指定存储位置(AUTO模式)

返回结果如下:+-+-+-+-+-+-+|ID|STORAGE_INST_ID|DB|GROUP|PHY_DB|MOVABLE|+-+-+-+-+-+-+|0|polardbx-ng28-dn-0|db1|DB1_P00000_GROUP|db1_p00000|1|1|polardbx-ng28-dn-1|db1|DB1_P00001_GROUP|db1_p00001|1|2|polardbx-ng28-dn-2|db1|DB...

引入&配置SDK

['*.jar'],dir:'libs')/集成统计分析SDK implementation 'com.lydaas.qtsdk:qt-common:1.6.1.P' //apm稳定性SDK库 implementation 'com.lydaas.qtsdk:apm-crash:1.5.2.1.0.0.3' //apm性能SDK库 implementation '...

RANGE-LIST

2),SUBPARTITION p1 VALUES in(3,4),SUBPARTITION p2 VALUES in(5,6)),PARTITION m2 VALUES LESS THAN(2000)(SUBPARTITION p3 VALUES in(1,2),SUBPARTITION p4 VALUES in(3,4),SUBPARTITION p5 VALUES in(5,6)),PARTITION m3 VALUES LESS ...

LIST-LIST

2),SUBPARTITION partno1 VALUES in(3,4),SUBPARTITION partno2 VALUES in(5,6)),PARTITION p1 VALUES in(3,4)(SUBPARTITION partno3 VALUES in(1,2),SUBPARTITION partno4 VALUES in(3,4),SUBPARTITION partno5 VALUES in(5,6)),PARTITION...

HASH-LIST

SUBPARTITION p1 VALUES in(3,4),SUBPARTITION p2 VALUES in(5,6)),PARTITION dp1(SUBPARTITION p3 VALUES in(1,2),SUBPARTITION p4 VALUES in(3,4),SUBPARTITION p5 VALUES in(5,6)),PARTITION dp2(SUBPARTITION p6 VALUES in(1,2),...

KEY-LIST

2),SUBPARTITION p1 VALUES in(3,4),SUBPARTITION p2 VALUES in(5,6)),PARTITION dp1(SUBPARTITION p3 VALUES in(1,2),SUBPARTITION p4 VALUES in(3,4),SUBPARTITION p5 VALUES in(5,6)),PARTITION dp2(SUBPARTITION p6 VALUES in(1,2),...

LIST DEFAULT HASH

创建多个DEFAULT分区示例如下:CREATE TABLE list_default_hash(a INT,b INT)PARTITION BY LIST(a)(PARTITION p0 VALUES IN(1,2,3,4,5),PARTITION p1 VALUES IN(6,7,8,9,10),PARTITION pd DEFAULT PARTITIONS 3);分区键字段类型为 VARCHAR ...

ListAlerts-查询告警发送历史

告警严重程度从 P6、P5、P4、P3、P2、P1 逐级上升。P6 DispatchRuleId long 否 通知策略 ID。12345 IntegrationType string 否 集成类型。ARMS CLOUD_MONITOR MSE ARMS_CLOUD_DIALTEST PROMETHEUS LOG_SERVICE CUSTOM ARMS_PROMETHEUS ARMS...

Analyze and handle data skew

merge,and migrate partitions.The following example shows how to identify a partition-level data skew:Create a table named test_tb.CREATE TABLE `test_tb`(`id` int(11)DEFAULT NULL)PARTITION BY RANGE(`id`)(PARTITION p1 VALUES...

物理专线网络性能测试方法

iperf3-s-i 1-p 16001 iperf3-s-i 1-p 16002 iperf3-s-i 1-p 16003 iperf3-s-i 1-p 16004 iperf3-s-i 1-p 16005 iperf3-s-i 1-p 16006 iperf3-s-i 1-p 16007 iperf3-s-i 1-p 16008 分别在8个ECS实例上执行 iperf3-u-l 16-b 100m-t 120-c ...

如何在较大结果集中使用ORDER BY

CREATE TABLE test(p1,p2,p3,c1,c2,c3,primary key(p1,p2,p3))/其中p1,p2,p3为联合主键 SELECT*FROM test WHERE p1=?ORDER BY p2/该SQL支持ORDER BY SELECT*FROM test WHERE p1=?and p2=?ORDER BY p3/该SQL支持ORDER BY SELECT*FROM test ...

模型

本文介绍Mesh模型在OGC SF标准模型的基础上新增的数据模型。...TRIANGLEFAN TriangleFan基于连续的点来描述多面体系统,如以下多面体:可以分别使用顶点坐标串(p1,p2,p3,p4,p5)来描述三个三角面(p1,p2,p3),(p1,p3,p4),(p1,p4,p5)。

模型

本文介绍Mesh模型在OGC SF标准模型的基础上新增的数据模型。...TRIANGLEFAN TriangleFan基于连续的点来描述多面体系统,如以下多面体:可以分别使用顶点坐标串(p1,p2,p3,p4,p5)来描述三个三角面(p1,p2,p3),(p1,p3,p4),(p1,p4,p5)。

重命名分区

默认4个一级分区的分区名称分别是p1、p2、p3、p4,这个表一共有12个二级分区,分别是:p1sp1,p2sp1,p3sp1,p4sp1 p1sp2,p2sp2,p3sp2,p4sp2 p1sp3,p2sp3,p3sp3,p4sp3 重命名p1为p10:alter table tb1 rename partition p1 to p10 ...

Retired GPU-accelerated instance types

m1.large 2 6 NVIDIA P4*1/8 8GB*1/8 1 300,000 2 2 6 ecs.vgn5i-m2.xlarge 4 12 NVIDIA P4*1/4 8GB*1/4 2 500,000 2 3 10 ecs.vgn5i-m4.2xlarge 8 24 NVIDIA P4*1/2 8GB*1/2 3 800,000 2 4 10 ecs.vgn5i-m8.4xlarge 16 48 NVIDIA P4*1 8GB...

分区迁移

默认地,4个一级分区的分区名称分别是p1、p2、p3、p4,这个表一共有12个二级分区,分别是:p1sp1,p2sp1,p3sp1,p4sp1 p1sp2,p2sp2,p3sp2,p4sp2 p1sp3,p2sp3,p3sp3,p4sp3 可以迁移整个分区模板,例如:alter table tb1 move ...

ST_Angle

which are named P1,P2,and P3 in sequence,this function calculates the angle clockwise from P1 to P2 and then to P3.ST_Angle(P1,P2,P3)=ST_Angle(P2,P1,P2,P3)If you specify four points,which are named P1,P2,P3,and P4 in ...

ST_Angle

which are named P1,P2,and P3 in sequence,this function calculates the angle clockwise from P1 to P2 and then to P3.ST_Angle(P1,P2,P3)=ST_Angle(P2,P1,P2,P3)If you specify four points,which are named P1,P2,P3,and P4 in ...

ST_Angle

which are named P1,P2,and P3 in sequence,this function calculates the angle clockwise from P1 to P2 and then to P3.ST_Angle(P1,P2,P3)=ST_Angle(P2,P1,P2,P3)If you specify four points,which are named P1,P2,P3,and P4 in ...

Retired instance types

000 1 3 ecs.sn2.xlarge 8 32.0 1.5 400,000 1 4 ecs.sn2.3xlarge 16 64.0 3.0 500,000 2 8 ecs.sn2.7xlarge 32 128.0 6.0 800,000 3 8 ecs.sn2.13xlarge 56 224.0 10.0 1,200,000 4 8 sn1,compute-optimized instance family Features:...

Rename a partition

Each partition has their name,and PolarDB for PostgreSQL(Compatible with Oracle)supports the modification of partition names.This topic describes the syntax ...ALTER TABLE hash_partitions_sales RENAME PARTITION p1 TO p1_new;

Rename a partition

Each partition has their name,and PolarDB for PostgreSQL(Compatible with Oracle)supports the modification of partition names.This topic describes the syntax ...ALTER TABLE hash_partitions_sales RENAME PARTITION p1 TO p1_new;
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