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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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27 changes: 27 additions & 0 deletions
27
fe/fe-core/src/main/java/org/apache/doris/nereids/exceptions/MustFallbackException.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.exceptions; | ||
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/** | ||
* Exception for unsupported command to run in Nereids. | ||
*/ | ||
public class MustFallbackException extends RuntimeException { | ||
public MustFallbackException(String msg) { | ||
super(String.format("Must fallback to legacy planner, because %s", msg)); | ||
} | ||
} |
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46 changes: 46 additions & 0 deletions
46
...-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.nereids.exceptions.MustFallbackException; | ||
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 NoForward { | ||
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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 { | ||
throw new MustFallbackException("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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