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src/sql/engine/expr/ob_expr_from_tz.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 OCEANBASE_SQL_OB_EXPR_FROM_TZ_H_
+#define OCEANBASE_SQL_OB_EXPR_FROM_TZ_H_
+
+#include "sql/engine/expr/ob_expr_operator.h"
+
+namespace oceanbase {
+namespace sql {
+class ObExprFromTz : public ObFuncExprOperator {
+  public:
+  explicit ObExprFromTz(common::ObIAllocator& alloc);
+  virtual ~ObExprFromTz()
+  {}
+  virtual int calc_result_type2(
+      ObExprResType& type, ObExprResType& input1, ObExprResType& input2, common::ObExprTypeCtx& type_ctx) const;
+  virtual int calc_result2(common::ObObj& result, const common::ObObj& input1, const common::ObObj& input2,
+      common::ObExprCtx& expr_ctx) const;
+
+  static int eval_from_tz_val(const common::ObOTimestampData& in_ts_val, const common::ObString& tz_str,
+      ObSQLSessionInfo& my_session, common::ObOTimestampData& out_ts_val);
+  static int eval_from_tz(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& res);
+  virtual int cg_expr(ObExprCGCtx& expr_cg_ctx, const ObRawExpr& raw_expr, ObExpr& expr) const override;
+
+  private:
+  // disallow copy
+  DISALLOW_COPY_AND_ASSIGN(ObExprFromTz);
+};
+
+}  // namespace sql
+}  // namespace oceanbase
+#endif  // OCEANBASE_SQL_OB_EXPR_FROM_TZ_H_