Big data distributed real-time query method and system
A distributed real-time, query method technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems affecting the query performance of the distributed real-time query system, so as to reduce query pressure, provide performance, and improve query performance. The effect of efficiency
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[0038] The present invention will be further described below in conjunction with specific examples.
[0039] In the big data distributed real-time query method provided by this embodiment, at first, the query statement and query script file obtained through SQL APP and ODBC / JDBC are parsed and analyzed, and if it is a query script file, it is divided into multiple query Statements are processed separately. For a single query statement, it is divided by keywords, such as limit, groupby, join on, etc. Then the query coordinator will use different nodes to represent different operations for each part of the division, and then generate a basic query plan tree according to the execution order of the nodes, such as Figure 4 shown. The root node of the query plan tree is used to aggregate results and return them, while the leaf nodes of the query plan tree are generally Scan operations, which are used to obtain related table data.
[0040] For the query plan tree with low complex...
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