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An open source document database with bitemporal graph queries

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package xtdb.operator

import org.apache.arrow.memory.BufferAllocator
import xtdb.vector.RelationReader

interface SelectionSpec {
    /**
     * @param params a single-row indirect relation containing the params for this invocation - maybe a view over a bigger param relation.
     */
    fun select(allocator: BufferAllocator, readRelation: RelationReader, schema: Map, params: RelationReader): IntArray
}