44 lines
1.7 KiB
C++
44 lines
1.7 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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#pragma once
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#include "exec/set_operation_node.h"
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namespace doris {
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class MemPool;
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class RowBatch;
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class TupleRow;
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// Node that calculate the except results of its children by either materializing their
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// evaluated expressions into row batches or passing through (forwarding) the
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// batches if the input tuple layout is identical to the output tuple layout
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// and expressions don't need to be evaluated. The except node pulls from its
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// children sequentially, i.e.
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// it exhausts one child completely before moving on to the next one.
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class ExceptNode : public SetOperationNode {
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public:
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ExceptNode(ObjectPool* pool, const TPlanNode& tnode, const DescriptorTbl& descs);
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virtual Status init(const TPlanNode& tnode, RuntimeState* state = nullptr);
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virtual Status open(RuntimeState* state);
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virtual Status get_next(RuntimeState* state, RowBatch* row_batch, bool* eos);
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};
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}; // namespace doris
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