PartitionPruneV2ForShortCircuitPlan.java

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package org.apache.doris.planner;

import org.apache.doris.analysis.LiteralExpr;
import org.apache.doris.catalog.Column;
import org.apache.doris.catalog.PartitionItem;
import org.apache.doris.catalog.PartitionKey;
import org.apache.doris.common.AnalysisException;

import com.google.common.collect.Range;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import java.util.Collection;
import java.util.Map;
import java.util.Map.Entry;

public class PartitionPruneV2ForShortCircuitPlan extends PartitionPrunerV2Base {
    private static final Logger LOG = LogManager.getLogger(PartitionPruneV2ForShortCircuitPlan.class);
    // map to record literal range to find specific partition
    private RangeMap<LiteralExpr, Long> partitionRangeMapByLiteral = new RangeMap<>();
    private Map<Long, PartitionItem> cachedPartitionItems;
    private long cachedPartitionTopologyVersion = -1;

    PartitionPruneV2ForShortCircuitPlan() {
        super();
    }

    // The caller holds the owning table's read lock while updating and pruning.
    public boolean update(Map<Long, PartitionItem> keyItemMap, long partitionTopologyVersion) {
        if (cachedPartitionItems == keyItemMap && cachedPartitionTopologyVersion == partitionTopologyVersion) {
            return false;
        }
        RangeMap<LiteralExpr, Long> newRangeMap = new RangeMap<>();
        for (Entry<Long, PartitionItem> entry : keyItemMap.entrySet()) {
            Range<PartitionKey> range = entry.getValue().getItems();
            LiteralExpr partitionLowerBound = (LiteralExpr) range.lowerEndpoint().getKeys().get(0);
            LiteralExpr partitionUpperBound = (LiteralExpr) range.upperEndpoint().getKeys().get(0);
            Range<LiteralExpr> partitionRange = Range.closedOpen(partitionLowerBound, partitionUpperBound);
            newRangeMap.put(partitionRange, entry.getKey());
        }
        partitionRangeMapByLiteral = newRangeMap;
        cachedPartitionItems = keyItemMap;
        cachedPartitionTopologyVersion = partitionTopologyVersion;
        if (LOG.isDebugEnabled()) {
            LOG.debug("update partitionRangeMapByLiteral");
        }
        return true;
    }

    public Collection<Long> prune(LiteralExpr lowerBound, LiteralExpr upperBound) throws AnalysisException {
        Range<LiteralExpr> filterRangeValue = Range.closed(lowerBound, upperBound);
        return partitionRangeMapByLiteral.getOverlappingRangeValues(filterRangeValue);
    }

    @Override
    public Collection<Long> prune() throws AnalysisException {
        throw new AnalysisException("Not implemented");
    }

    @Override
    void genSingleColumnRangeMap() {
    }

    @Override
    FinalFilters getFinalFilters(ColumnRange columnRange,
            Column column) throws AnalysisException {
        throw new AnalysisException("Not implemented");
    }

    @Override
    Collection<Long> pruneMultipleColumnPartition(Map<Column, FinalFilters> columnToFilters) throws AnalysisException {
        throw new AnalysisException("Not implemented");
    }
}