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src/sql/engine/expr/ob_expr_func_partition_key.h Normal file
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/**
* Copyright (c) 2021 OceanBase
* OceanBase CE is licensed under Mulan PubL v2.
* You can use this software according to the terms and conditions of the Mulan PubL v2.
* You may obtain a copy of Mulan PubL v2 at:
* http://license.coscl.org.cn/MulanPubL-2.0
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PubL v2 for more details.
*/
#ifndef OCEANBASE_SQL_OB_EXPR_FUNC_PARTITION_KEY_H_
#define OCEANBASE_SQL_OB_EXPR_FUNC_PARTITION_KEY_H_
#include "sql/engine/expr/ob_expr_operator.h"
namespace oceanbase {
namespace sql {
class ObExprFuncPartOldKey : public ObFuncExprOperator {
public:
explicit ObExprFuncPartOldKey(common::ObIAllocator& alloc);
virtual ~ObExprFuncPartOldKey();
virtual int calc_result_typeN(
ObExprResType& type, ObExprResType* types_stack, int64_t param_num, common::ObExprTypeCtx& type_ctx) const;
virtual int calc_resultN(
common::ObObj& result, const common::ObObj* objs_stack, int64_t param_num, common::ObExprCtx& expr_ctx) const;
virtual int cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
static int eval_part_old_key(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
private:
// disallow copy
DISALLOW_COPY_AND_ASSIGN(ObExprFuncPartOldKey);
};
class ObExprFuncPartKey : public ObFuncExprOperator {
public:
explicit ObExprFuncPartKey(common::ObIAllocator& alloc);
virtual ~ObExprFuncPartKey();
virtual int calc_result_typeN(
ObExprResType& type, ObExprResType* types_stack, int64_t param_num, common::ObExprTypeCtx& type_ctx) const;
virtual int calc_resultN(
common::ObObj& result, const common::ObObj* objs_stack, int64_t param_num, common::ObExprCtx& expr_ctx) const;
virtual int cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
static int calc_partition_key(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
private:
// disallow copy
DISALLOW_COPY_AND_ASSIGN(ObExprFuncPartKey);
};
// key partitioning function, third version.
// solve partition row skew problem
class ObExprFuncPartNewKey : public ObFuncExprOperator {
public:
explicit ObExprFuncPartNewKey(common::ObIAllocator& alloc);
virtual ~ObExprFuncPartNewKey();
virtual int calc_result_typeN(
ObExprResType& type, ObExprResType* types_stack, int64_t param_num, common::ObExprTypeCtx& type_ctx) const;
virtual int calc_resultN(
common::ObObj& result, const common::ObObj* objs_stack, int64_t param_num, common::ObExprCtx& expr_ctx) const;
virtual int cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
static int calc_new_partition_key(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
private:
// disallow copy
DISALLOW_COPY_AND_ASSIGN(ObExprFuncPartNewKey);
};
} // namespace sql
} // namespace oceanbase
#endif // OCEANBASE_SQL_OB_EXPR_FUNC_PARTITION_KEY_H_