ShowReplicaDistributionStmt.java

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// to you under the Apache License, Version 2.0 (the
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//
//   http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.doris.analysis;

import org.apache.doris.catalog.Column;
import org.apache.doris.catalog.Env;
import org.apache.doris.catalog.ScalarType;
import org.apache.doris.common.AnalysisException;
import org.apache.doris.common.ErrorCode;
import org.apache.doris.common.ErrorReport;
import org.apache.doris.common.UserException;
import org.apache.doris.common.util.Util;
import org.apache.doris.mysql.privilege.PrivPredicate;
import org.apache.doris.qe.ConnectContext;
import org.apache.doris.qe.ShowResultSetMetaData;

import com.google.common.collect.ImmutableList;

// show replica distribution from tbl [partition(p1, p2, ...)]
public class ShowReplicaDistributionStmt extends ShowStmt implements NotFallbackInParser {
    public static final ImmutableList<String> TITLE_NAMES = new ImmutableList.Builder<String>()
            .add("BackendId").add("ReplicaNum").add("ReplicaSize")
            .add("NumGraph").add("NumPercent")
            .add("SizeGraph").add("SizePercent")
            .add("CloudClusterName").add("CloudClusterId")
            .build();

    private TableRef tblRef;

    public ShowReplicaDistributionStmt(TableRef tblRef) {
        this.tblRef = tblRef;
    }

    @Override
    public void analyze(Analyzer analyzer) throws AnalysisException, UserException {
        super.analyze(analyzer);

        // check auth
        if (!Env.getCurrentEnv().getAccessManager().checkGlobalPriv(ConnectContext.get(), PrivPredicate.ADMIN)) {
            ErrorReport.reportAnalysisException(ErrorCode.ERR_SPECIFIC_ACCESS_DENIED_ERROR, "ADMIN");
        }

        tblRef.getName().analyze(analyzer);
        Util.prohibitExternalCatalog(tblRef.getName().getCtl(), this.getClass().getSimpleName());
    }

    public String getDbName() {
        return tblRef.getName().getDb();
    }

    public String getTblName() {
        return tblRef.getName().getTbl();
    }

    public PartitionNames getPartitionNames() {
        return tblRef.getPartitionNames();
    }

    @Override
    public ShowResultSetMetaData getMetaData() {
        ShowResultSetMetaData.Builder builder = ShowResultSetMetaData.builder();
        for (String title : TITLE_NAMES) {
            builder.addColumn(new Column(title, ScalarType.createVarchar(30)));
        }
        return builder.build();
    }

    @Override
    public RedirectStatus getRedirectStatus() {
        if (ConnectContext.get().getSessionVariable().getForwardToMaster()) {
            return RedirectStatus.FORWARD_NO_SYNC;
        } else {
            return RedirectStatus.NO_FORWARD;
        }
    }
}