For distributed query processing, as many stages of query processing as possible are performed on remote servers, and the rest of the stages (merging intermediate results and everything after that) are performed on the requestor server.
The Distributed engine does not store data itself, but allows distributed query processing on multiple servers. Reading is automatically parallelized. During a read, the table indexes on remote servers are used, if there are any.
There are two options for IN-s with subqueries (similar to JOINs): normal IN/ JOIN and GLOBAL IN/ GLOBAL JOIN. They differ in how they are run for distributed query processing.
对于带有子查询的(类似与JOINs)IN中,有两种选择:普通的IN/JOIN与GLOBAL IN / GLOBAL JOIN。它们对于分布式查询的处理运行方式是不同的。
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Synonyms and analogies of "distributed query processing" in English