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src/sql/engine/expr/ob_expr_tanh.cpp

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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.
+ */
+
+#define USING_LOG_PREFIX SQL_ENG
+#include "ob_expr_tanh.h"
+#include "sql/engine/expr/ob_expr_util.h"
+#include "share/object/ob_obj_cast.h"
+#include "sql/parser/ob_item_type.h"
+//#include "sql/engine/expr/ob_expr_promotion_util.h"
+#include "sql/session/ob_sql_session_info.h"
+#include <math.h>
+
+using namespace oceanbase::common;
+using namespace oceanbase::sql;
+
+namespace oceanbase {
+namespace sql {
+ObExprTanh::ObExprTanh(ObIAllocator& alloc) : ObFuncExprOperator(alloc, T_FUN_SYS_TANH, N_TANH, 1, NOT_ROW_DIMENSION)
+{}
+
+ObExprTanh::~ObExprTanh()
+{}
+
+int ObExprTanh::calc_result_type1(ObExprResType& type, ObExprResType& type1, common::ObExprTypeCtx& type_ctx) const
+{
+  return calc_trig_function_result_type1(type, type1, type_ctx);
+}
+
+int ObExprTanh::calc_result1(ObObj& result, const ObObj& obj, ObExprCtx& expr_ctx) const
+{
+  int ret = OB_SUCCESS;
+  if (OB_UNLIKELY(OB_ISNULL(expr_ctx.calc_buf_))) {
+    ret = OB_NOT_INIT;
+    LOG_WARN("varchar buffer not init", K(ret));
+  } else if (OB_UNLIKELY(obj.is_null())) {
+    result.set_null();
+  } else if (obj.is_number()) {
+    number::ObNumber res_nmb;
+    if (OB_FAIL(obj.get_number().tanh(res_nmb, *(expr_ctx.calc_buf_)))) {
+      LOG_WARN("fail to calc tanh", K(obj), K(ret), K(res_nmb));
+    } else {
+      result.set_number(res_nmb);
+    }
+  } else if (obj.is_double()) {
+    double arg = obj.get_double();
+    double res = tanh(arg);
+    result.set_double(res);
+  }
+  return ret;
+}
+
+DEF_CALC_TRIGONOMETRIC_EXPR(tanh, false, OB_SUCCESS);
+
+int ObExprTanh::cg_expr(ObExprCGCtx& expr_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const
+{
+  int ret = OB_SUCCESS;
+  UNUSED(expr_cg_ctx);
+  UNUSED(raw_expr);
+  rt_expr.eval_func_ = calc_tanh_expr;
+  return ret;
+}
+
+}  // namespace sql
+}  // namespace oceanbase