Code_pred_op.hpp
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上传日期:2022-05-23
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文件大小:3k
- /* Copyright (C) 2003 MySQL AB
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- #ifndef ODBC_CODEGEN_Code_pred_op_hpp
- #define ODBC_CODEGEN_Code_pred_op_hpp
- #include <common/common.hpp>
- #include <common/DataField.hpp>
- #include "Code_pred.hpp"
- /**
- * @class Pred_op
- * @brief Boolean operators
- */
- struct Pred_op {
- enum Opcode {
- And = 1, // binary
- Or,
- Not // unary
- };
- Pred_op(Opcode opcode);
- const char* name() const;
- unsigned arity() const;
- Opcode m_opcode;
- };
- inline
- Pred_op::Pred_op(Opcode opcode) :
- m_opcode(opcode)
- {
- }
- /**
- * @class Plan_pred_op
- * @brief Operator node in a predicate in PlanTree
- */
- class Plan_pred_op : public Plan_pred {
- public:
- Plan_pred_op(Plan_root* root, Pred_op op);
- virtual ~Plan_pred_op();
- Plan_base* analyze(Ctx& ctx, Ctl& ctl);
- Exec_base* codegen(Ctx& ctx, Ctl& ctl);
- void print(Ctx& ctx);
- bool isGroupBy(const Plan_expr_row* row) const;
- // children
- void setPred(unsigned i, Plan_pred* pred);
- protected:
- friend class Plan_pred;
- Pred_op m_op;
- Plan_pred* m_pred[1 + 2];
- };
- inline
- Plan_pred_op::Plan_pred_op(Plan_root* root, Pred_op op) :
- Plan_pred(root, TypeOp),
- m_op(op)
- {
- m_pred[0] = m_pred[1] = m_pred[2] = 0;
- }
- inline void
- Plan_pred_op::setPred(unsigned i, Plan_pred* pred)
- {
- ctx_assert(1 <= i && i <= m_op.arity() && pred != 0);
- m_pred[i] = pred;
- }
- /**
- * @class Exec_pred_op
- * @brief Operator node in a predicate in ExecTree
- */
- class Exec_pred_op : public Exec_pred {
- public:
- class Code : public Exec_pred::Code {
- public:
- Code(Pred_op op);
- virtual ~Code();
- protected:
- friend class Exec_pred_op;
- Pred_op m_op;
- };
- class Data : public Exec_pred::Data {
- public:
- Data();
- virtual ~Data();
- protected:
- friend class Exec_pred_op;
- };
- Exec_pred_op(Exec_root* root);
- virtual ~Exec_pred_op();
- void alloc(Ctx& ctx, Ctl& ctl);
- void execInterp(Ctx& ctx, Ctl& ctl);
- void evaluate(Ctx& ctx, Ctl& ctl);
- void close(Ctx& ctx);
- void print(Ctx& ctx);
- // children
- const Code& getCode() const;
- Data& getData() const;
- void setPred(unsigned i, Exec_pred* pred);
- protected:
- Exec_pred* m_pred[1 + 2];
- };
- inline
- Exec_pred_op::Code::Code(Pred_op op) :
- m_op(op)
- {
- }
- inline
- Exec_pred_op::Data::Data()
- {
- }
- inline
- Exec_pred_op::Exec_pred_op(Exec_root* root) :
- Exec_pred(root)
- {
- m_pred[0] = m_pred[1] = m_pred[2] = 0;
- }
- // children
- inline const Exec_pred_op::Code&
- Exec_pred_op::getCode() const
- {
- const Code* code = static_cast<const Code*>(m_code);
- return *code;
- }
- inline Exec_pred_op::Data&
- Exec_pred_op::getData() const
- {
- Data* data = static_cast<Data*>(m_data);
- return *data;
- }
- inline void
- Exec_pred_op::setPred(unsigned i, Exec_pred* pred)
- {
- ctx_assert(1 <= i && i <= 2 && m_pred[i] == 0);
- m_pred[i] = pred;
- }
- #endif