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2021-05-31 22:56:52 +08:00
commit cea7de1475
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--- a/src/sql/engine/expr/ob_expr_format.h
+++ b/src/sql/engine/expr/ob_expr_format.h
@ -0,0 +1,61 @@
+/**
+ * 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_ENGINE_EXPR_FORMAT_H_
+#define OCEANBASE_SQL_ENGINE_EXPR_FORMAT_H_
+
+#include "sql/engine/expr/ob_expr_operator.h"
+
+namespace oceanbase {
+namespace sql {
+
+class ObLocale {
+  public:
+  uint decimal_point_;
+  uint thousand_sep_;
+  const char* grouping_;
+  ObLocale()
+      : decimal_point_('.'), /* decimal point en_US */
+        thousand_sep_(','),  /* thousands_sep en_US */
+        grouping_("\x03\x03")
+  {} /* grouping en_US */
+  ObLocale(uint decimal_point_par, uint thousand_sep_par, const char* grouping_par)
+      : decimal_point_(decimal_point_par), thousand_sep_(thousand_sep_par), grouping_(grouping_par)
+  {}
+};
+
+class ObExprFormat : public ObFuncExprOperator {
+  public:
+  explicit ObExprFormat(common::ObIAllocator& alloc);
+  virtual ~ObExprFormat();
+  virtual int calc_result_typeN(
+      ObExprResType& type, ObExprResType* types, int64_t param_num, common::ObExprTypeCtx& type_ctx) const;
+  virtual int calc_resultN(
+      common::ObObj& result, const common::ObObj* objs_array, int64_t param_num, common::ObExprCtx& expr_ctx) const;
+  virtual int cg_expr(ObExprCGCtx& expr_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
+  static int calc_format_expr(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& res_datum);
+
+  private:
+  int get_origin_param_type(ObExprResType& ori_type) const;
+  int convert_num_to_str(
+      const common::ObObj* objs_array, common::ObExprCtx& expr_ctx, int64_t scale, common::ObString& num_str) const;
+  static int64_t get_format_scale(int64_t scale);
+  static int convert_num_to_str(const common::ObObjType& obj_type, const ObDatum& x_datum, char* buf, int64_t buf_len,
+      int64_t scale, common::ObString& num_str);
+  static int build_format_str(char* buf, const ObLocale& locale, int64_t scale, common::ObString& num_str);
+  int calc_result_type(ObExprResType& type, ObExprResType* types) const;
+  DISALLOW_COPY_AND_ASSIGN(ObExprFormat);
+};
+}  // namespace sql
+}  // namespace oceanbase
+
+#endif /* OCEANBASE_SQL_ENGINE_EXPR_CHAR_H_ */