创建索引概述
总览 CREATE[UNIQUE|BITMAP]INDEX[schema_name.]index_name ON { cluster_index_clause|table_index_clause|bitmap_join_index_clause }[USABLE|UNUSABLE][{ DEFERRED|IMMEDIATE } INVALIDATION];table_index_clause:[schema.]table[t_...
alicloud_threat_detection_honeypot_preset
id-(Required,ForceNew)Unique id of management node preset_name-(Required)Honeypot template custom name meta The meta supports the following:portrait_option-(Optional)Social traceability.burp-(Required)Burp counter.trojan_...
ERROR:duplicate key value violates unique
Cause:org.postgresql.util.PSQLException:ERROR:duplicate key value violates unique constraint"od_model_biz_detail_attribute_attribute_name_model_id_idx"Detail:Key(attribute_name,model_id)=(user_id_col,43085)already 问题原因...
alicloud_ens_image
only the build machine is supported.Optional values:true:When the instance is released,the image is released together with the instance.false:When the instance is released,the image is retained and is not released together...
alicloud_cloud_firewall_vpc_firewall_control_...
acl_action-(Optional,ForceNew)The action that Cloud Firewall performs on the traffic.Valid values:accept,drop,log.acl_uuid-(Optional,ForceNew)Access control over VPC firewalls strategy unique identifier.description-...
alicloud_mse_gateways
names-A list of Gateway names.gateways-A list of Mse Gateways.Each element contains the following attributes:backup_vswitch_id-The backup vswitch id.gateway_name-The name of the Gateway.gateway_unique_id-Gateway unique ...
创建GLOBAL INDEX
语法 CREATE[UNIQUE]INDEX[CONCURRENTLY][[IF NOT EXISTS]name]ON[ONLY]table_name[USING method]({ column_name|(expression)}[COLLATE collation][opclass[(opclass_parameter=value[,.])]][ASC|DESC][NULLS { FIRST|LAST }][,.])...
索引加速
在Aggregate、Unique和Duplicate三种数据模型中，底层的数据存储是按照各自建表语句中AGGREGATE KEY、UNIQUE KEY和DUPLICATE KEY里指定的列进行排序存储的。而前缀索引，即在排序的基础上，实现的一种根据给定前缀列，快速查询数据的索引...
ALIYUN:PAI:Workspace
3 to 23 characters in length and can contain letters,underscores,or numbers.-Must start with a large or small letter.-Unique in the current region.","AllowedPattern":"^[a-zA-Z][_a-zA-Z0-9]{2,22}$"},"WorkspaceName":{"Type":...
ALIYUN:FNF:Flow
Description:The most recently modified time of the flow.Value:Fn:GetAtt:Flow-LastModifiedTime Id:Description:The unique ID of the flow.Value:Fn:GetAtt:Flow-Id JSON 格式 {"ROSTemplateFormatVersion":"2015-09-01","Parameters...
DATASOURCE:PAI:Workspaces
Unique in the current region.' Type:String Resources:ExtensionDataSource:Properties:WorkspaceName:Ref:WorkspaceName Type:DATASOURCE:PAI:Workspaces Outputs:WorkspaceIds:Description:The list of workspace IDs.Value:Fn:GetAtt:...
ALIYUN:CloudSSO:Directory
示例 YAML 格式 ROSTemplateFormatVersion:'2015-09-01' Parameters:DirectoryName:Description:en:'The name of the directory.The name must be globally unique.The name can contain lowercase letters,digits,or hyphens(-).The name ...
Affected rows行为
PolarDB-X 2.0 CREATE PARTITION TABLE `tb`(`id` int(11)NOT NULL,`a` int(11)DEFAULT NULL,`b` int(11)DEFAULT NULL,PRIMARY KEY(`id`),UNIQUE GLOBAL INDEX/*ua_$b525*/`ua`(`a`)PARTITION BY KEY(`a`)PARTITIONS 3,UNIQUE LOCAL KEY `_...
VAML协议接入指南
unique_code="${uuid}"><section><avatar ai_action="true"><action begin_index="2"code="动作code1"interrupt="true"/><action begin_index="12"code="动作code2"interrupt="true"/><action begin_index="17"code=...
alicloud_logtail_attachment
config_name-(Required,ForceNew)The Logtail configuration name,which is unique in the same project.machine_group_name-(Required,ForceNew)The machine group name,which is unique in the same project.Attributes Reference The ...
AUTO模式下的主键拆分
TABLE|CREATE TABLE|+-+-+|t_order|CREATE TABLE `t_order`(`x` int(11)NOT NULL AUTO_INCREMENT,`order_id` varchar(20)DEFAULT NULL,`seller_id` varchar(20)DEFAULT NULL,PRIMARY KEY(`x`),INDEX `i_0`(`seller_id`),UNIQUE INDEX `i_1`...
创建索引
语法 CREATE[UNIQUE]INDEX name ON table({ column|(expression)})[TABLESPACE tablespace]参数 参数名称 描述 UNIQUE 当创建索引（如果数据已经存在）和每一次添加数据的时候，这个参数会让系统去检查表中的重复值。如果进行的插入或更新...
ALIYUN:KMS:Key
The globally unique identifier for the CMK.Value:Fn:GetAtt:Key-KeyId JSON 格式 {"ROSTemplateFormatVersion":"2015-09-01","Parameters":{ },"Resources":{"Key":{"Type":"ALIYUN:KMS:Key","Properties":{"KeyUsage":"ENCRYPT/DECRYPT...
设备风险识别SDK合规使用说明
Android端配置方法 通过调整信息采集接口中option的DataType配置可选个人信息的操作，内容可选择单个或多个，单选："NO_UNIQUE_DEVICE_DATA"，多选："NO_UNIQUE_DEVICE_DATANO_IDENTIFY_DEVICE_DATA。个人信息息字段 说明 DataType配置字段...
查询索引描述信息
} } 返回结果示例如下：response table schema:[Table:STRING,Non_unique:INTEGER,Key_name:STRING,Seq_in_index:INTEGER,Column_name:STRING,Is_defined_column:STRING,Collation:STRING,Cardinality:INTEGER,Sub_part:INTEGER,Packed:...
查询索引描述信息
row.GetStringByName("Index_type")fmt.Printf("%v",indexType)} } 返回结果示例如下：response table schema:[Table:STRING Non_unique:INTEGER Key_name:STRING Seq_in_index:INTEGER Column_name:STRING Is_defined_column:STRING ...
全局二级索引对DML的限制
snapshot` longtext DEFAULT NULL,`order_detail` longtext DEFAULT NULL,PRIMARY KEY(`id`),UNIQUE KEY `l_i_order`(`order_id`),GLOBAL INDEX `g_i_seller`(`seller_id`)dbpartition by hash(`seller_id`)tbpartition by hash(`seller_id...
使用全局二级索引时的注意事项
语句 是否支持变更主表拆分键 是否支持变更主表主键（也即索引表主键）是否支持变更本地唯一索引列 是否支持变更索引表拆分键 是否支持变更Unique Index列 是否支持变更Index列 是否支持变更Covering列 ADD COLUMN 无该场景 不支持 无该...
smlar
smlar.stattable STRING 存储集合范围统计信息的表名，表定义方式如下：CREATE TABLE table_name(value data_type UNIQUE,ndoc int4(or bigint)NOT NULL CHECK(ndoc>0));smlar.tf_method STRING 计算词频TF（Term Frequency）的方法，取值...
CREATE TABLE
UNIQUE(column_name[,.])index_parameters|PRIMARY KEY(column_name[,.])index_parameters|EXCLUDE[USING index_method](exclude_element WITH operator[,.])index_parameters[WHERE(predicate)]|FOREIGN KEY(column_name[,.])REFERENCES ...
创建索引
标准语法 CREATE INDEX index_name ON table_name(index_col_name,.)index_column_name:column_name[(length)][ASC|DESC]DROP INDEX index_name ON table_name 注意事项 ...不支持动态添加UNIQUE INDEX，因为此操作会造成副本间数据不一致。
Dataphin即席查询报错“Metering data exceed max ...
Tracking Os Job[1/1]Process:Original SQL(Formatted)-SELECT ds,unique_id,uid,template_id,join_id,mobile_sha256,message_id,business_event_id,business_plan_id,account_code,template_code,template_version,sms_content,sms_sign,...
约束
我们可以通常的方式为一个唯一索引命名：CREATE TABLE products(product_no integer CONSTRAINT must_be_different UNIQUE,name text,price numeric);增加一个唯一约束会在约束中列出的列或列组上自动创建一个唯一 B-tree 索引。只覆盖某些...
smlar
smlar.stattable STRING 存储集合范围统计信息的表名，表定义方式如下：CREATE TABLE table_name(value data_type UNIQUE,ndoc int4(or bigint)NOT NULL CHECK(ndoc>0));smlar.tf_method STRING 计算词频TF（Term Frequency）的方法，取值...
消息幂等
处理方法 以Message ID为幂等键对消息进行幂等处理的步骤如下：在数据库中创建一张unique key索引为唯一Message ID的表。在Producer客户端为每条消息设置唯一Message ID。设置唯一Message ID的示例代码如下：AMQP.BasicProperties props=...
smlar
smlar.stattable STRING 存储集合范围统计信息的表名，表定义方式如下：CREATE TABLE table_name(value data_type UNIQUE,ndoc int4(or bigint)NOT NULL CHECK(ndoc>0));smlar.tf_method STRING 计算词频TF（Term Frequency）的方法，取值...
smlar
smlar.stattable STRING 存储集合范围统计信息的表名，表定义方式如下：CREATE TABLE table_name(value data_type UNIQUE,ndoc int4(or bigint)NOT NULL CHECK(ndoc>0));smlar.tf_method STRING 计算词频TF（Term Frequency）的方法，取值...
如何创建Federated表
示例如下：CREATE TABLE `t1`(`a` VARCHAR(100),UNIQUE KEY(`a`(30)))ENGINE=FEDERATED CONNECTION='MYSQL:/username:passsword@127.0.0.1:3306/test/t1';说明 由于指定Connection来创建Federated表的方式中，相关账号和密码是明文保存，...
ALIYUN:CloudPhone:KeyPair
示例 YAML 格式 ROSTemplateFormatVersion:'2015-09-01' Parameters:KeyPairName:Description:en:The name of the key pair.The name must be globally unique.The name must be 2 to 128 characters in length.The name must start with a...
alicloud_cloud_firewall_control_policies
direction-(Required,ForceNew)The direction of the traffic to which the access control policy applies.Valid values:in,out.acl_uuid-(Optional,ForceNew)The unique ID of the access control policy.acl_action-(Optional,ForceNew)...
DDL 语法
添加唯一约束*/ALTER TABLE table_name ADD UNIQUE uni_name1(name1);添加索引/*创建索引*/CREATE INDEX idx_addr ON table_name(address);使用 ALTER TABLE 语句添加索引*/ALTER TABLE table_name ADD INDEX idx_addr(address);创建唯一...
OSS Load
DELETE ON expr 需配合 MEREGE 导入模式一起使用，仅针对Unique Key模型的表。用于指定导入数据中表示Delete Flag的列和计算关系。ORDER BY 仅针对Unique Key模型的表。用于指定导入数据中表示Sequence Col的列。主要用于导入时保证数据...
ALTER TABLE
语句 是否支持变更主表拆分键 是否支持变更主表主键（也即索引表主键）是否支持变更本地唯一索引列 是否支持变更索引表拆分键 是否支持变更Unique Index列 是否支持变更Index列 是否支持变更Covering列 ADD COLUMN 无该场景 不支持 无该...
alicloud_dfs_mount_point
which specifies the mount point alias prefix.description-(Optional)The description of the Mount point.No more than 32 characters in length.file_system_id-(Required,ForceNew)Unique file system identifier,used to retrieve ...
alicloud_dfs_mount_point
which specifies the mount point alias prefix.description-(Optional)The description of the Mount point.No more than 32 characters in length.file_system_id-(Required,ForceNew)Unique file system identifier,used to retrieve ...
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