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src/sql/engine/expr/ob_expr_width_bucket.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 SRC_SQL_ENGINE_EXPR_OB_EXPR_WIDTH_BUCKET_H_
+#define SRC_SQL_ENGINE_EXPR_OB_EXPR_WIDTH_BUCKET_H_
+
+#include <cstdint>
+
+#include "sql/engine/expr/ob_expr_res_type.h"
+#include "sql/parser/ob_item_type.h"
+#include "ob_expr_operator.h"
+
+namespace oceanbase {
+namespace sql {
+class ObExprWidthBucket : public ObFuncExprOperator {
+  public:
+  explicit ObExprWidthBucket(common::ObIAllocator& alloc);
+  virtual ~ObExprWidthBucket()
+  {}
+
+  virtual int calc_result_typeN(
+      ObExprResType& type, ObExprResType* types, int64_t param_num, common::ObExprTypeCtx& type_ctx) const override;
+  virtual int calc_resultN(common::ObObj& res, const common::ObObj* obj_array, int64_t param_num,
+      common::ObExprCtx& expr_ctx) const override;
+  static int calc_time_type(const int64_t time_usec1, const int64_t time_usec2, const int64_t time_usec3,
+      const int16_t time_nsec1, const int16_t time_nsec2, const int16_t time_nsec3,
+      const common::ObObjType& target_type, common::ObIAllocator& alloc, common::number::ObNumber& e_nmb,
+      common::number::ObNumber& start_nmb, common::number::ObNumber& end_nmb);
+  virtual int cg_expr(ObExprCGCtx& expr_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const;
+  static int calc_width_bucket_expr(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& res);
+};
+}  // namespace sql
+}  // namespace oceanbase
+
+#endif /* _OB_EXPR_WIDTH_BUCKET_H_ */