Hi all, Siddhi query object model is being changed to enhance Siddhi capabilities and performance. Currently I am working on semantically validating the new object model. Basic approach is to decompose the user given query and validate it against given set of stream definitions and previous queries. Stream definitions themselves are validated before hand. Validation will happen at Siddhi core level. We had to move it to Siddhi core level to facilitate validation of custom functions. Also same code is reused in validation by embedding validation logic to Siddhi executor creation. Currently simple and join queries with complex expressions/conditions can be validated. Pattern validation will be completed upon pattern query API completion.
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