Details
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Improvement
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Status: Closed
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Major
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Resolution: Won't Fix
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Description
In STORM-1434 we revamped the way to build Trident topology for Storm SQL.
While revamping visitProject(), it should handle multiple things (calculate expression, projection) and moreover Trident doesn't allow duplicated field name. So we end up having multiple steps - each -> project -> each -> project - which doesn't look good.
STORM-2072 is introducing a way to map / flatMap with specifying different output fields. With this, we can reduce visitProject() to have just 1 step instead of 4 steps.
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