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[Enhancement] (nereids)implement showBackendsCommand in nereids
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95 changes: 95 additions & 0 deletions
95
...core/src/main/java/org/apache/doris/nereids/trees/plans/commands/ShowBackendsCommand.java
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| // Licensed to the Apache Software Foundation (ASF) under one | ||
| // or more contributor license agreements. See the NOTICE file | ||
| // distributed with this work for additional information | ||
| // regarding copyright ownership. The ASF licenses this file | ||
| // to you under the Apache License, Version 2.0 (the | ||
| // "License"); you may not use this file except in compliance | ||
| // with the License. You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, | ||
| // software distributed under the License is distributed on an | ||
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| // KIND, either express or implied. See the License for the | ||
| // specific language governing permissions and limitations | ||
| // under the License. | ||
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| package org.apache.doris.nereids.trees.plans.commands; | ||
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| import org.apache.doris.analysis.RedirectStatus; | ||
| import org.apache.doris.catalog.Column; | ||
| import org.apache.doris.catalog.Env; | ||
| import org.apache.doris.catalog.ScalarType; | ||
| import org.apache.doris.common.ErrorCode; | ||
| import org.apache.doris.common.ErrorReport; | ||
| import org.apache.doris.common.proc.BackendsProcDir; | ||
| import org.apache.doris.mysql.privilege.PrivPredicate; | ||
| import org.apache.doris.nereids.trees.plans.PlanType; | ||
| import org.apache.doris.nereids.trees.plans.visitor.PlanVisitor; | ||
| import org.apache.doris.qe.ConnectContext; | ||
| import org.apache.doris.qe.ShowResultSet; | ||
| import org.apache.doris.qe.ShowResultSetMetaData; | ||
| import org.apache.doris.qe.StmtExecutor; | ||
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| import org.apache.logging.log4j.LogManager; | ||
| import org.apache.logging.log4j.Logger; | ||
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| import java.util.Comparator; | ||
| import java.util.List; | ||
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| /** | ||
| * show backends command | ||
| */ | ||
| public class ShowBackendsCommand extends ShowCommand { | ||
| public static final Logger LOG = LogManager.getLogger(ShowBackendsCommand.class); | ||
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| /** | ||
| * constructor | ||
| */ | ||
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| public ShowBackendsCommand() { | ||
| super(PlanType.SHOW_BACKENDS_COMMAND); | ||
| } | ||
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| public ShowResultSetMetaData getMetaData() { | ||
| ShowResultSetMetaData.Builder builder = ShowResultSetMetaData.builder(); | ||
| for (String title : BackendsProcDir.TITLE_NAMES) { | ||
| builder.addColumn(new Column(title, ScalarType.createVarchar(30))); | ||
| } | ||
| return builder.build(); | ||
| } | ||
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| @Override | ||
| public ShowResultSet doRun(ConnectContext ctx, StmtExecutor executor) throws Exception { | ||
| if (!Env.getCurrentEnv().getAccessManager().checkGlobalPriv(ConnectContext.get(), PrivPredicate.ADMIN) | ||
| && !Env.getCurrentEnv().getAccessManager().checkGlobalPriv(ConnectContext.get(), | ||
| PrivPredicate.OPERATOR)) { | ||
| ErrorReport.reportAnalysisException(ErrorCode.ERR_SPECIFIC_ACCESS_DENIED_ERROR, "ADMIN/OPERATOR"); | ||
| } | ||
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| List<List<String>> backendInfos = BackendsProcDir.getBackendInfos(); | ||
| backendInfos.sort(new Comparator<List<String>>() { | ||
| @Override | ||
| public int compare(List<String> o1, List<String> o2) { | ||
| return Long.compare(Long.parseLong(o1.get(0)), Long.parseLong(o2.get(0))); | ||
| } | ||
| }); | ||
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| return new ShowResultSet(getMetaData(), backendInfos); | ||
| } | ||
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| @Override | ||
| public <R, C> R accept(PlanVisitor<R, C> visitor, C context) { | ||
| return visitor.visitShowBackendsCommand(this, context); | ||
| } | ||
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| @Override | ||
| public RedirectStatus toRedirectStatus() { | ||
| if (ConnectContext.get().getSessionVariable().getForwardToMaster()) { | ||
| return RedirectStatus.FORWARD_NO_SYNC; | ||
| } else { | ||
| return RedirectStatus.NO_FORWARD; | ||
| } | ||
| } | ||
| } |
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22 changes: 22 additions & 0 deletions
22
regression-test/suites/nereids_p0/show/test_nereids_showbackends.groovy
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| @@ -0,0 +1,22 @@ | ||
| // Licensed to the Apache Software Foundation (ASF) under one | ||
| // or more contributor license agreements. See the NOTICE file | ||
| // distributed with this work for additional information | ||
| // regarding copyright ownership. The ASF licenses this file | ||
| // to you under the Apache License, Version 2.0 (the | ||
| // "License"); you may not use this file except in compliance | ||
| // with the License. You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, | ||
| // software distributed under the License is distributed on an | ||
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| // KIND, either express or implied. See the License for the | ||
| // specific language governing permissions and limitations | ||
| // under the License. | ||
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| suite("test_nereids_showbackends") { | ||
| checkNereidsExecute("""show backends;""") | ||
| } | ||
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