ColumnMatch
class ColumnMatch
What one segment's column said about a predicate, and what deciding it cost.
The two bitmaps are over that segment's ordinals, so they intersect directly with an inverted index's postings over the same segment — both hang off the one base sidecar. Neither is a set of answers: matches is a claim about the version the column recorded, which a newer segment or a memtable may have replaced.
Properties
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Ordinals whose stored value satisfies the predicate. Exact, and decided without a document.
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Ordinals the column did not store; only the document decides these.
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Whether the segment's bounds, or its physical type, ruled the shredded part out entirely.