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[feature](Nereids) support set and use statement syntax only
1. add a new Command type: UnsupportedCommand to handle the statement only support parse but could not execute. 2. support syntax about set and use
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47 changes: 47 additions & 0 deletions
47
...-core/src/main/java/org/apache/doris/nereids/trees/plans/commands/UnsupportedCommand.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.common.AnalysisException; | ||
| 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.StmtExecutor; | ||
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| /** | ||
| * all Nereids' unsupported command | ||
| */ | ||
| public class UnsupportedCommand extends Command implements ForwardWithSync { | ||
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| public static UnsupportedCommand INSTANCE = new UnsupportedCommand(); | ||
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| public UnsupportedCommand() { | ||
| super(PlanType.UNSUPPORTED_COMMAND); | ||
| } | ||
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| @Override | ||
| public void run(ConnectContext ctx, StmtExecutor executor) throws Exception { | ||
| ctx.getSessionVariable().enableFallbackToOriginalPlannerOnce(); | ||
| throw new AnalysisException("unsupported command"); | ||
| } | ||
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| @Override | ||
| public <R, C> R accept(PlanVisitor<R, C> visitor, C context) { | ||
| return visitor.visitUnsupportedCommand(this, context); | ||
| } | ||
| } |
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