Package org.apache.druid.query

Interface QuerySegmentWalker

public interface QuerySegmentWalker
An interface for query-handling entry points.

  • Method Details

    • getQueryRunnerForIntervals

      <T> QueryRunner<T> getQueryRunnerForIntervals(Query<T> query, Iterable<org.joda.time.Interval> intervals)
      Gets the Queryable for a given interval, the Queryable returned can be any version(s) or partitionNumber(s) such that it represents the interval.
      Type Parameters:
      T - query result type
      Parameters:
      query - the query to find a Queryable for
      intervals - the intervals to find a Queryable for
      Returns:
      a Queryable object that represents the interval

    • getQueryRunnerForSegments

      <T> QueryRunner<T> getQueryRunnerForSegments(Query<T> query, Iterable<SegmentDescriptor> specs)
      Gets the Queryable for a given list of SegmentDescriptors. The descriptors are expected to apply to the base datasource involved in the query, i.e. the one returned by: 
         DataSourceAnalysis.forDataSource(query.getDataSource()).getBaseDataSource()
      Type Parameters:
      T - the query result type
      Parameters:
      query - the query to return a Queryable for
      specs - the list of SegmentSpecs to find a Queryable for
      Returns:
      the Queryable object with the given SegmentSpecs