While a thread is running, either uploading or downloading, you can query it to check on its status to provide the user with feedback (e.g. a progress bar).
Object constraint language (OCL) is the sub-standard of UML, which can be used not only in constraint and query on models, but also in defining transformation rules and modeling language.
Hive makes Hadoop more familiar to those with a Structured Query Language (SQL) background, but it also supports the traditional MapReduce infrastructure for data processing.
To support such a query, an administrator can use multi-dimensional clustering to instruct DB2 to physically organize rows in the SALES table by these dimensions.