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[Enhancement] (nereids)implement showEventsCommand in nereids (apache…
…#44499) Issue Number: close apache#42732
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...e-core/src/main/java/org/apache/doris/nereids/trees/plans/commands/ShowEventsCommand.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.catalog.Column; | ||
| import org.apache.doris.catalog.ScalarType; | ||
| 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 com.google.common.collect.Lists; | ||
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| import java.util.List; | ||
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| /** | ||
| * show events | ||
| */ | ||
| public class ShowEventsCommand extends ShowCommand { | ||
| private static final ShowResultSetMetaData META_DATA = | ||
| ShowResultSetMetaData.builder() | ||
| .addColumn(new Column("Db", ScalarType.createVarchar(20))) | ||
| .addColumn(new Column("Name", ScalarType.createVarchar(30))) | ||
| .addColumn(new Column("Definer", ScalarType.createVarchar(20))) | ||
| .addColumn(new Column("Time", ScalarType.createVarchar(20))) | ||
| .addColumn(new Column("Type", ScalarType.createVarchar(20))) | ||
| .addColumn(new Column("Execute at", ScalarType.createVarchar(20))) | ||
| .addColumn(new Column("Interval value", ScalarType.createVarchar(30))) | ||
| .addColumn(new Column("Interval field", ScalarType.createVarchar(30))) | ||
| .addColumn(new Column("Status", ScalarType.createVarchar(30))) | ||
| .addColumn(new Column("Ends", ScalarType.createVarchar(30))) | ||
| .addColumn(new Column("Status", ScalarType.createVarchar(30))) | ||
| .addColumn(new Column("Originator", ScalarType.createVarchar(30))) | ||
| .addColumn(new Column("character_set_client", ScalarType.createVarchar(30))) | ||
| .addColumn(new Column("collation_connection", ScalarType.createVarchar(30))) | ||
| .addColumn(new Column("Database Collation", ScalarType.createVarchar(30))) | ||
| .build(); | ||
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| public ShowEventsCommand() { | ||
| super(PlanType.SHOW_EVENTS_COMMAND); | ||
| } | ||
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| @Override | ||
| public <R, C> R accept(PlanVisitor<R, C> visitor, C context) { | ||
| return visitor.visitShowEventsCommand(this, context); | ||
| } | ||
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| @Override | ||
| public ShowResultSet doRun(ConnectContext ctx, StmtExecutor executor) throws Exception { | ||
| List<List<String>> rowSet = Lists.newArrayList(); | ||
| return new ShowResultSet(META_DATA, rowSet); | ||
| } | ||
| } |
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