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MetaData
XML MetaData Annotations All variants of JDO support specification of persistence using XML MetaData. JDO 2.1+ adds on the ability to specify persistence using Java annotations.... -
Aggregation Functions
Data Setup min Using min() with Lists max stDev stDevP percentileCont percentileDisc count Using count(expression) to return the number of values Counting non-null value... -
Performance
Read performance Write performance Accumulo can be tuned to improve read and write performance. Read performance Enable caching on tables to reduce reads to disk. Enable b... -
Hive JDBC Driver
Instructions Install Hive JDBC JDBC URL Example Instructions Kyuubi is fully compatible with Hive JDBC and ODBC drivers that let you connect to popular Business Intelligence ... -
Slack
Slack 参数配置 如何获取Webhook地址 新建一个Slack APP 激活Incoming Webhooks设置 创建一个Incoming Webhook 获取Incoming Webhooks地址 Slack 如果您需要使用到Slack进行告警，请在告警实例管理里创建告警实例，选择 Slack 插件。Slack的配置样例如下: ... -
Relation
countBy difference differenceWith unionWith union gt gte intersection lt lte max min propEq sortBy pathEq maxBy minBy countBy (a → String) → [a] → {*} Paramet... -
6.1 Add LaTeX code to the preamble
The general structure of a LaTeX document is like this: \documentclass { article } % preamble \begin { document } % body \end { document } That is, you declare the d... -
Event Listener
Introduction Support Those Engines API Event Data API Event Listener API Event Collect API Configuration Listener Zeta Engine Flink Engine Spark Engine Introduction The... -
11. Redis commands mapping
Redis command Sync / Async APIRedisson.create(config) Reactive APIredisson.reactive() RxJava3 APIredisson.rxJava() AUTH Config.setPassword() - - APPEND RBinarySt... -
5.2 Indent text
As mentioned in Section 4.12 , whitespaces are often meaningless in Markdown. Markdown will also ignore spaces used for indentation by default. However, we may want to keep the in...