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src/sql/engine/expr/ob_expr_neg.h

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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 _OB_EXPR_NEG_H_
+#define _OB_EXPR_NEG_H_
+
+#include "sql/engine/expr/ob_expr_operator.h"
+
+namespace oceanbase {
+namespace sql {
+class ObExprNeg : public ObExprOperator {
+  typedef common::ObExprStringBuf IAllocator;
+
+  public:
+  explicit ObExprNeg(common::ObIAllocator& alloc);
+  virtual ~ObExprNeg(){};
+
+  virtual int calc_result_type1(ObExprResType& type, ObExprResType& type1, common::ObExprTypeCtx& type_ctx) const;
+
+  virtual int calc_result1(common::ObObj& result, const common::ObObj& obj, common::ObExprCtx& expr_ctx) const;
+
+  virtual int cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
+
+  private:
+  static int calc_(const common::ObObj& param, common::ObObj& res, common::ObCastCtx& cast_ctx);
+
+  static int calc_param_type(
+      const ObExprResType& param_type, common::ObObjType& calc_type, common::ObObjType& result_type);
+
+  private:
+  DISALLOW_COPY_AND_ASSIGN(ObExprNeg) const;
+};
+}  // namespace sql
+}  // namespace oceanbase
+#endif /* _OB_EXPR_NEG_H_ */