Real-time streaming data query method and device
A data query and real-time streaming technology, applied in the field of data query, can solve the problems of manual analysis, error-prone, manpower and material resources, etc., and achieve the effects of improving accuracy, efficient query, and saving manpower and physics
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[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.
[0027] As mentioned earlier, when Flink-SQL uses the aggregation scenario (that is, group by), because the data is a continuous flow, the aggregation result is also dynamically changed in real time. For this changed data, Flink uses flags to label the invalid result data with a false label, and label the current valid result data with a true label, and present it to the user. However, general data analysts are only proficient in SQL syntax, but they are not clear about the principle of Flink. For example, in the real-time streaming scenario, after Flink-SQL is execut...
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