青云QingCloud 数据库研发工程师 ► Look back: Why we choose it ► Now: How we do ► Future: What we do Content Why we choose it Why we choose it Why we choose it 不断的汇总日成交量从 而制定商业规划 Why we choose it 不断收集市场变化信 息预测股价涨跌 息预测股价涨跌 不断的汇总日成交量从 而制定商业规划 Why we choose it 不断收集CPU、 Memory等系统指标预 测系统未来趋势 不断收集市场变化信 息预测股价涨跌 不断的汇总日成交量从 而制定商业规划 Why we choose it 不断收集CPU、 Memory等系统指标预 测系统未来趋势 不断收集市场变化信 息预测股价涨跌 不断的汇总日成交量从 旧数据趋于不变 ► (3) 新数据更有价值 ► (4) 数据总是随时间变化而不断变化 Why we choose it ► 解决方案 ► (1) Row-Orient Database ► (2) Column-Orient Database ► (3) Time-Series-Orient Database Why we choose it Time Name Age Humidity HeartRate

rightly in ShardingSphere? . . . . . . . . 293 7.2 Why do some compiling errors appear? Why did not the IDEA index the generated codes?293 7.3 Why is xsd unable to be found when Spring Namespace is used . . . . . 294 7.4 How to solve Cloud not resolve placeholder ⋯in string value ⋯ error? 294 7.5 Why does float number appear in the return result of inline expression? . . . . . . . . . 294 7.6 If sharding . . . . . . . . . . . . 295 7.8 When generic Long type SingleKeyTableShardingAlgorithm is used, why doesClassCastException: Integer can not cast to Long exception ap‐ pear? . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 10 FAQ 90 10.1 Why do some compiling errors appear? . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 10.2 Does Does ElasticJob support dynamically adding jobs? . . . . . . . . . . . . . . . . . . . . . 90 10.3 Why is the job configuration modified in the code or Spring XML file, but the registry center is not updated cannot be debugged in the online environment? 91 10.7 Why can’t the Console page display normally? . . . . . . . . . . . . . . . . . . . . . . 92 10.8 Why is the job state shard to be adjusted in the Console

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303 7.7.1 1. [JDBC] Why there may be an error when configure both shardingsphere‐jdbc‐ spring‐boot‐starter and a spring‐boot‐starter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303 7.7.2 2. [JDBC] Why is xsd unable to be found when Spring Namespace is used? . . . 303 7.7.3 3. [JDBC] Found a JtaTransactionManager error? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305 7.7.9 9. [Sharding] Why does float number appear in the return result of inline ex‐ pression? . . . . . . . . . . . . . .

......................................................................................... 1 1.2. Why Sync? ............................................................................................ no synchronization capabilities. Zumero solves that problem. Zumero is "sync for SQLite". 1.2. Why Sync? Many mobile apps are built on the assumption that the network is reliable and always available one with 'action_default'. This will override the previous rule. Frequently Asked Questions 47 Why can't I declare a column in a Zumero table which has a foreign key reference to a non-Zumero table

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345 7.8.1 [JDBC] Why there may be an error when configure both shardingsphere‐jdbc‐ spring‐boot‐starter and a spring‐boot‐starter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345 7.8.2 [JDBC] Why is xsd unable to be found when Spring Namespace is used? . . . . . 346 7.8.3 [JDBC] Found a JtaTransactionManager error? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 348 7.8.9 [Sharding] Why does float number appear in the return result of inline expression?348 7.8.10 [Sharding] If sharding

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 454 8.1.1 JDBC Why there may be an error when configure both shardingsphere‐jdbc‐ spring‐boot‐starter and a spring‐boot‐starter druid)? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 454 8.1.2 JDBC Why is xsd unable to be found when Spring Namespace is used? . . . . . 454 8.1.3 JDBC Found a JtaTransactionManager ⋯ error? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 457 8.3.2 Sharding Why does float number appear in the return result of inline expression?457 8.3.3 Sharding If sharding

error? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 578 13.3.2 Sharding Why does float number appear in the return result of inline expression?578 13.3.3 Sharding If sharding . . . . . . 578 13.3.4 Sharding When generic Long type SingleKeyTableShardingAlgorithm is used, why does the ClassCastException: Integer can not cast to Long exception appear? . . . . . . . . . . . ClassCastExcep- tion: Integer can not cast to Long exception occurs. . . . . . . . . 579 13.3.6 Sharding Why is the default distributed auto‐augment key strategy provided by ShardingSphere not continuous and

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357 7.8.1 [JDBC] Why there may be an error when configure both shardingsphere‐jdbc‐ spring‐boot‐starter and a spring‐boot‐starter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357 7.8.2 [JDBC] Why is xsd unable to be found when Spring Namespace is used? . . . . . 358 7.8.3 [JDBC] Found a JtaTransactionManager error? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 360 7.8.9 [Sharding] Why does float number appear in the return result of inline expression?360 7.8.10 [Sharding] If sharding

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 493 8.1.1 JDBC Why there may be an error when configure both shardingsphere‐jdbc‐ spring‐boot‐starter and a spring‐boot‐starter druid)? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 493 8.1.2 JDBC Why is xsd unable to be found when Spring Namespace is used? . . . . . 493 8.1.3 JDBC Found a JtaTransactionManager ⋯ error? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 496 8.3.2 Sharding Why does float number appear in the return result of inline expression?496 8.3.3 Sharding If sharding