Extension of CQL over Dynamic Databases

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Provided by: Journal of Universal Computer Science
Topic: Big Data
Format: PDF
CQL, Continuous Query Language is suitable for data stream queries. Sometimes it is better if the queries operate on relational databases and data streams simultaneously. The execution of a CQL query takes a long time (several hours, days or even more). It is not clear what kind of semantics is suitable for the user when the database is updated during the execution of a CQL query. In this paper the authors give a short description of CQL, a characterization of update-problems, and they offer possible suggestions for the semantic extension of CQL.
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