Details
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New Feature
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Status: Resolved
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Major
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Resolution: Fixed
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None
Description
A composite comparator is a sub-class of VectorValueComparator that contains an array of inner comparators, with each comparator corresponding to one column for comparison. It can be used to support sort/comparison operations for VectorSchemaRoot/StructVector.
The composite comparator works like this: it first uses the first internal comparator (for the primary sort key) to compare vector values. If it gets a non-zero value, we just return it; otherwise, we use the second comparator to break the tie, and so on, until a non-zero value is produced by some internal comparator, or all internal comparators have been used.
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