关于pooled table, table pool, cluster table, table cluster以及其他

昨天确实搞混了。
主要是认为cluster table实际存储与table cluster里，而存储机制又如此的与INDX-type table(cluster database)相似，于是划上了等号。
加上昨天与jgtang82沟通中，两人说的术语有版本差异:)，所以搞到今天早上来公司了才清清楚楚明明白白。

但是我还是认为，SAP数据字典在底层实现cluster database与table cluster上是一致的。这个就需要有时间来考究了。
有几个Link,挺有用的
https://www.sdn.sap.com/irj/sdn/thread?messageID=2952163#2952163
https://www.sdn.sap.com/irj/sdn/thread?messageID=2363906#2363906
https://www.sdn.sap.com/irj/sdn/message?messageID=3700050

尤其
Note: Never mix up with a database table that has the necessary structure for storing data clusters in database tables and in the shared memory. Those are called INDX-type, with reference to the database table INDX supplied by SAP. Data clusters are groupings of data objects for transient and persistent storage in a selectable storage medium. A data cluster can be processed using the statements IMPORT, EXPORT, and DELETE FROM.