fe/src/main/java/org/apache/doris/common/proc/ColocationGroupProcDir.java

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// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
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//
//   http://www.apache.org/licenses/LICENSE-2.0
//
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package org.apache.doris.common.proc;

import org.apache.doris.catalog.Catalog;
import org.apache.doris.catalog.ColocateTableIndex;
import org.apache.doris.catalog.ColocateTableIndex.GroupId;
import org.apache.doris.common.AnalysisException;

import com.google.common.collect.ImmutableList;

import java.util.List;

/*
 * show proc "/colocation_group";
 */
public class ColocationGroupProcDir implements ProcDirInterface {
    public static final ImmutableList<String> TITLE_NAMES = new ImmutableList.Builder<String>()
            .add("GroupId").add("GroupName").add("TableIds")
            .add("BucketsNum").add("ReplicationNum").add("DistCols").add("IsStable").build();

    @Override
    public boolean register(String name, ProcNodeInterface node) {
        return false;
    }

    @Override
    public ProcNodeInterface lookup(String groupIdStr) throws AnalysisException {
        String[] parts = groupIdStr.split("\\.");
        if (parts.length != 2) {
            throw new AnalysisException("Invalid group id: " + groupIdStr);
        }

        long dbId = -1;
        long grpId = -1;
        try {
            dbId = Long.valueOf(parts[0]);
            grpId = Long.valueOf(parts[1]);
        } catch (NumberFormatException e) {
            throw new AnalysisException("Invalid group id: " + groupIdStr);
        }

        GroupId groupId = new GroupId(dbId, grpId);
        ColocateTableIndex index = Catalog.getCurrentColocateIndex();
        List<List<Long>> beSeqs = index.getBackendsPerBucketSeq(groupId);
        return new ColocationGroupBackendSeqsProcNode(beSeqs);
    }

    @Override
    public ProcResult fetchResult() throws AnalysisException {
        BaseProcResult result = new BaseProcResult();
        result.setNames(TITLE_NAMES);

        ColocateTableIndex index = Catalog.getCurrentColocateIndex();
        List<List<String>> infos = index.getInfos();
        result.setRows(infos);
        return result;
    }
}