判断表达式的值是否为 NaN,如果值为 NaN,返回True,否则返回False。命令格式 boolean isnan()参数说明 expr:必填。DOUBLE类型。输入为STRING、BIGINT、DECIMAL类型时,会隐式转换为DOUBLE类型后参与运算。返回值说明 如果 expr 的值为 ...
本文介绍了 NULL值相关的函数 的语法、参数以及示例...coalesce-3.934 select coalesce(null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,1)FROM DUAL;coalesce-1
pg_replication_slots 视图提供了当前存在于数据库集簇上的所有复制槽的列表,其中也包括...safe_wal_size int8 可写入 WAL 的字节数,以便此插槽不会处于"丢失"状态的危险中。对丢失插槽它是NULL,以及如果 max_slot_wal_keep_size 是-1。
本文介绍条件表达式的基本语法和示例。日志服务支持如下条件表达式。重要 在日志服务分析语句中,表示字符串的字符必须使用单引号('')包裹,无符号包裹或被双引号("")包裹的字符表示字段名或列名。例如:'status' 表示字符串status,...
0,name1,1.0,NaN,3.0,4.0 1,name1,2.0,NaN,NaN,1.0 2,name1,3.0,4.0,1.0,NaN 3,name1,NaN,1.0,2.0,3.0 4,name1,1.0,NaN,3.0,4.0 5,name1,1.0,2.0,3.0,4.0 6,name1,NaN,NaN,NaN,NaN 在左侧导航栏上单击 工作空间列表。选择 操作 列中的 快速...
Reason":"null","ReasonMcmsKey":"null","ReasonMcmsContext":{"key":"null"},"Proposal":"Contact the administrator.","ProposalMcmsKey":"null","ProposalMcmsContext":{"key":"null"},"UpstreamErrorDetail":"null"},"Code":"INNER_...
本文介绍如何观察 Node.js 性能平台的监控指标。进入应用控制台,点击想查看的应用 实例 按钮,进入对应的实例即可查看 Node.js 性能平台提供的各种监控指标。概览 顶部导航栏展示服务器通用的一些信息,下面我们对每一个栏目进行说明。...
本文为您介绍如何使用COPY命令导入本地的数据至Hologres或从Hologres中导出数据至本地。使用限制 使用COPY命令的限制说明如下:当前COPY命令支持的数据类型与Hologres引擎支持的数据类型一致,详情参见 数据类型汇总。如果导入的是分区表...
逻辑运算符 运算符 说明 A and B TRUE and TRUE=TRUE TRUE and FALSE=FALSE FALSE and TRUE=FALSE FALSE and FALSE=FALSE FALSE and NULL=FALSE NULL and FALSE=FALSE TRUE and NULL=NULL NULL and TRUE=NULL NULL and NULL=NULL A or B ...
null","ReasonMcmsKey":"null","ReasonMcmsContext":{"key":"null"},"Proposal":"null","ProposalMcmsKey":"null","ProposalMcmsContext":{"key":"null"},"UpstreamErrorDetail":"null"},"Code":"200","Message":"successful","Advice":...
问题描述 在DMS控制台中执行变更时,出现类似如下报错:Data truncation:Truncated incorrect XXX 问题原因 数据变更:表上的字段定义和执行的SQL类型不符合,常见的场景为表上定义是字符串类型,SQL中用了数值类型的写法。结构变更:需要...
官方钉钉客户群:11794270 目前本产品的使用以自助和官方钉钉客户群客户之间互相帮助为主,我们也会不定期更新相关分析使用文章给大家,欢迎关注:云栖社区 Node.js 性能平台官方博客:https://yq.aliyun.com/teams/210 知乎 Egg.js 团队 ...
Reason":"null","ReasonMcmsKey":"null","ReasonMcmsContext":{"key":"null"},"Proposal":"null","ProposalMcmsKey":"null","ProposalMcmsContext":{"key":"null"},"UpstreamErrorDetail":"null"},"Code":"INNER_ERROR","Message":"A ...
null"},"Reason":"null","ReasonMcmsKey":"null","ReasonMcmsContext":{"key":"null"},"Proposal":"null","ProposalMcmsKey":"null","ProposalMcmsContext":{"key":"null"},"UpstreamErrorDetail":"null"},"Code":"INNER_ERROR","Message...
Reason":"null","ReasonMcmsKey":"null","ReasonMcmsContext":{"key":"null"},"Proposal":"null","ProposalMcmsKey":"null","ProposalMcmsContext":{"key":"null"},"UpstreamErrorDetail":"null"}],"ErrorCode":"INNER_ERROR","ErrorMsg":...
尺寸映射器用于调整图元尺寸大小,通过使用范围滑块决定图元尺寸范围,本文以配置 基础平面地图 3.0 组件中 矢量散点层 内的散点半径为例,为您介绍如何自定义数据值和尺寸的映射关系。配置尺寸映射 配置地图子组件内散点半径,您可以通过...
语法 UTL_RAW.CONCAT(r1 IN RAW DEFAULT NULL,r2 IN RAW DEFAULT NULL,r3 IN RAW DEFAULT NULL,r4 IN RAW DEFAULT NULL,r5 IN RAW DEFAULT NULL,r6 IN RAW DEFAULT NULL,r7 IN RAW DEFAULT NULL,r8 IN RAW DEFAULT NULL,r9 IN RAW DEFAULT ...
Reason":"null","ReasonMcmsKey":"null","ReasonMcmsContext":{"key":"null"},"Proposal":"Contact the administrator.","ProposalMcmsKey":"null","ProposalMcmsContext":{"key":"null"},"UpstreamErrorDetail":"null"},"Code":"INNER_...
将字符串 source 中的大写字符转换为对应的小写字符。命令格式 string tolower(string)参数说明 source:必填。STRING类型。如果输入为BIGINT、DOUBLE、DECIMAL或DATETIME类型,则会隐式转换为STRING类型后参与运算。目前只支持英文字符。...
将字符串 source 中的小写字符转换为对应的大写字符。命令格式 string toupper(string)参数说明 source:必填。STRING类型。如果输入为BIGINT、DOUBLE、DECIMAL或DATETIME类型,则会隐式转换为STRING类型后参与运算。目前只支持英文字符。...
Reason":"null","ReasonMcmsKey":"null","ReasonMcmsContext":{"key":"null"},"Proposal":"Contact the administrator.","ProposalMcmsKey":"null","ProposalMcmsContext":{"key":"null"},"UpstreamErrorDetail":"null"},"Code":"INNER_...
Reason":"null","ReasonMcmsKey":"null","ReasonMcmsContext":{"key":"null"},"Proposal":"Contact the administrator.","ProposalMcmsKey":"null","ProposalMcmsContext":{"key":"null"},"UpstreamErrorDetail":"null"},"Code":"INNER_...
Reason":"null","ReasonMcmsKey":"null","ReasonMcmsContext":{"key":"null"},"Proposal":"Contact the administrator.","ProposalMcmsKey":"null","ProposalMcmsContext":{"key":"null"},"UpstreamErrorDetail":"null"},"Code":"INNER_...
Reason":"null","ReasonMcmsKey":"null","ReasonMcmsContext":{"key":"null"},"Proposal":"请联系管理员","ProposalMcmsKey":"null","ProposalMcmsContext":{"key":"null"},"UpstreamErrorDetail":"null"},"Code":"INNER_ERROR","Message...
Reason":"null","ReasonMcmsKey":"null","ReasonMcmsContext":{"key":"null"},"Proposal":"Contact the administrator.","ProposalMcmsKey":"null","ProposalMcmsContext":{"key":"null"},"UpstreamErrorDetail":"null"},"Code":"INNER_...
Reason":"null","ReasonMcmsKey":"null","ReasonMcmsContext":{"key":"null"},"Proposal":"Contact the administrator.","ProposalMcmsKey":"null","ProposalMcmsContext":{"key":"null"},"UpstreamErrorDetail":"null"},"Code":"INNER_...
null","ReasonMcmsKey":"null","ReasonMcmsContext":{"key":"null"},"Proposal":"Contact the administrator.","ProposalMcmsKey":"null","ProposalMcmsContext":{"key":"null"},"UpstreamErrorDetail":"null"},"Code":"INNER_ERROR",...
Reason":"null","ReasonMcmsKey":"null","ReasonMcmsContext":{"key":"null"},"Proposal":"Contact the administrator.","ProposalMcmsKey":"null","ProposalMcmsContext":{"key":"null"},"UpstreamErrorDetail":"null"},"Code":"INNER_...
null","ReasonMcmsKey":"null","ReasonMcmsContext":{"key":"null"},"Proposal":"Contact the administrator.","ProposalMcmsKey":"null","ProposalMcmsContext":{"key":"null"},"UpstreamErrorDetail":"null"},"Code":"INNER_ERROR",...
不能使用比较运算符来测试游标变量的相等性、不等性、null或非null。不能将Null值分配给游标变量。游标变量的值不能存储在数据库列中。静态游标和游标变量不可互换。例如,静态游标不能在OPEN FOR语句中使用。此外,下表显示了用作存储过程...
Reason":"null","ReasonMcmsKey":"null","ReasonMcmsContext":{"key":"null"},"Proposal":"Contact the administrator.","ProposalMcmsKey":"null","ProposalMcmsContext":{"key":"null"},"UpstreamErrorDetail":"null"},"Code":"INNER_...
COALESCE 获取参数中第一个非NULL的值。GREATEST 返回参数中最大的值。IF 判断指定的条件是否为真。IS_CELLPHONE_NUMBER 判断指定的文本是否为手机号。LEAST 返回参数中最小的值。MAX_PT 返回分区表的一级分区的最大值。CAST 函数说明 将...
本文为您介绍在Hologres中如何使用COPY命令进行数据导入与导出。使用限制 使用COPY命令的限制说明如下:如果导入的是分区表数据,则Hologres只支持导入数据至分区表子表,不支持导入数据至分区表父表。在v1.1.43+版本中,当使用 COPY FROM ...
iotId or tenantId can not be null.设备和租户信息不能为空。请确认AccessKey信息和设备信息,然后重试。planId or tenantId can not be null.录像计划和租户信息不能为空。请填写正确的录像计划和AccessKey信息。templateId or tenantId ...
计算ARRAY数组 a 中的最大元素。命令格式 T array_max(array<T><a>)参数说明 a:必填。ARRAY数组。array中的 T 指代ARRAY数组元素的数据类型。数组中的元素可以为如下类型:TINYINT、SMALLINT、INT、BIGINT FLOAT、DOUBLE BOOLEAN DECIMAL...
执行计划如下:+-+-+-+-+-+-+-+-+-+-+-+-+|id|select_type|table|partitions|type|possible_keys|key|key_len|ref|rows|filtered|Extra|+-+-+-+-+-+-+-+-+-+-+-+-+|1|SIMPLE||NULL|ALL|NULL|NULL|NULL|NULL|5805759|100.00|Parallel export...
MaxCompute SQL提供了开发过程中常见的其他函数,您可以根据实际需要选择合适的函数。本文为您提供MaxCompute SQL支持的CAST、DECODE、LEAST等函数的命令格式、参数说明及示例。函数 功能 BASE64 将二进制表示值转换为BASE64编码格式字符串...
包括 INIT(未启动)、RUNNING(运行中)、SUSPEND(已暂停)、FAILED(失败)、FINISHED(已完成)、RELEASING(释放中)、RELEASED(已释放)、DELETED(已删除)、RUNNING_MODIFYING(修改中)和 RUNNING_MERGING(合并中)。RUNNING ...
返回MAP类型参数中满足指定条件的Value。注意事项 如果 var1 是 array类型,获取 var1 的第 var2 个元素。ARRAY数组元素编号自左往右,从0开始计数。如果 var1 是 map,V>类型,获取 var1 中Key为 var2 的Value。说明 使用该函数时需要去掉 ...
计算ARRAY数组 a 中的最小元素。命令格式 T array_min(array<T><a>)参数说明 a:必填。ARRAY数组。array中的 T 指代ARRAY数组元素的数据类型。数组中的元素可以为如下类型:TINYINT、SMALLINT、INT、BIGINT FLOAT、DOUBLE BOOLEAN DECIMAL...