95 lines
2.4 KiB
C++
95 lines
2.4 KiB
C++
/**
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* Copyright (c) 2021 OceanBase
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* OceanBase CE is licensed under Mulan PubL v2.
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* You can use this software according to the terms and conditions of the Mulan PubL v2.
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* You may obtain a copy of Mulan PubL v2 at:
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* http://license.coscl.org.cn/MulanPubL-2.0
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PubL v2 for more details.
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*/
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#ifndef OCEANBASE_SQL_ENGINE_JOIN_OB_JOIN_OP_
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#define OCEANBASE_SQL_ENGINE_JOIN_OB_JOIN_OP_
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#include "sql/engine/ob_operator.h"
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namespace oceanbase {
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namespace sql {
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class ObJoinSpec : public ObOpSpec {
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OB_UNIS_VERSION_V(1);
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public:
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ObJoinSpec(common::ObIAllocator& alloc, const ObPhyOperatorType type)
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: ObOpSpec(alloc, type), join_type_(UNKNOWN_JOIN), other_join_conds_(alloc)
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{}
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public:
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ObJoinType join_type_;
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common::ObFixedArray<ObExpr*, common::ObIAllocator> other_join_conds_;
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private:
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DISALLOW_COPY_AND_ASSIGN(ObJoinSpec);
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};
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class ObJoinOp : public ObOperator {
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public:
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ObJoinOp(ObExecContext& exec_ctx, const ObOpSpec& spec, ObOpInput* input)
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: ObOperator(exec_ctx, spec, input), output_row_produced_(false), left_row_joined_(false)
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{}
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virtual ~ObJoinOp()
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{}
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virtual int inner_open() override
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{
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return ObOperator::inner_open();
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}
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virtual int rescan() override;
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virtual void destroy() override
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{
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ObOperator::destroy();
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}
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virtual int inner_close() override
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{
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return ObOperator::inner_close();
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}
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int blank_left_row();
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int blank_right_row();
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inline bool need_left_join() const;
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inline bool need_right_join() const;
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int calc_other_conds(bool& is_match);
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virtual int get_next_left_row();
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virtual int get_next_right_row();
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const ObJoinSpec& get_spec() const
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{
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return static_cast<const ObJoinSpec&>(spec_);
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}
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public:
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bool output_row_produced_;
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bool left_row_joined_;
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private:
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DISALLOW_COPY_AND_ASSIGN(ObJoinOp);
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};
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inline bool ObJoinOp::need_left_join() const
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{
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return (LEFT_OUTER_JOIN == get_spec().join_type_ || FULL_OUTER_JOIN == get_spec().join_type_);
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}
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inline bool ObJoinOp::need_right_join() const
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{
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return (RIGHT_OUTER_JOIN == get_spec().join_type_ || FULL_OUTER_JOIN == get_spec().join_type_);
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}
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} // end namespace sql
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} // end namespace oceanbase
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#endif
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