UPSERT Statement (Impala 2.8 or higher only) UPSERT Statement (Impala 2.8 or higher only) Acts as a combination of the INSERT and UPDATE statements. For each row processed by...

对比 Kudu Hive事务 HBase 流式处理 对比 Apache Hudi填补了在DFS上处理数据的巨大空白，并可以和这些技术很好地共存。然而， 通过将Hudi与一些相关系统进行对比，来了解Hudi如何适应当前的大数据生态系统，并知晓这些系统在设计中做的不同权衡仍将非常有用。 Kudu Apache Kudu 是一个与Hudi具有...

DROP TABLE Statement DROP TABLE Statement Removes an Impala table. Also removes the underlying HDFS data files for internal tables, although not for external tables. Syntax: ...

TIMESTAMP Data Type TIMESTAMP Data Type A data type used in CREATE TABLE and ALTER TABLE statements, representing a point in time. Syntax: In the column definition of a CR...

概述 压缩 编码 产品 Apache Kudu Amazon RedShift Pivotal GPDB 总结 参考资料 概述 数据压缩是一个把输入数据集按照一定的算法变换成更小的数据集的过程，解压是压缩的逆过程。如果算法对数据本身的语义了解得越多，则越可能利用语义信息进行针对性的处理，获得更好的压缩效果。数据库系统中用得比较多的压缩...

12.20. Release 0.216 General Changes Web UI Hive Connector Changes Kudu Connector Changes Cassandra Connector Changes MySQL, PostgreSQL, Redshift, and SQL Server Changes Veri...

SHOW Statement SHOW FILES Statement SHOW ROLES Statement SHOW CURRENT ROLES SHOW ROLE GRANT GROUP Statement SHOW GRANT ROLE Statement SHOW GRANT USER Statement SHOW DATABASES...

Release 0.216 General Changes Web UI Hive Connector Changes Kudu Connector Changes Cassandra Connector Changes MySQL, PostgreSQL, Redshift, and SQL Server Changes Verifier Ch...

Release 0.216 General Changes Web UI Hive Connector Changes Kudu Connector Changes Cassandra Connector Changes MySQL, PostgreSQL, Redshift, and SQL Server Changes Verifier Ch...