71 lines
2.1 KiB
C++
71 lines
2.1 KiB
C++
/**
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* Copyright (c) 2021 OceanBase
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* OceanBase CE is licensed under Mulan PubL v2.
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* You can use this software according to the terms and conditions of the Mulan PubL v2.
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* You may obtain a copy of Mulan PubL v2 at:
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* http://license.coscl.org.cn/MulanPubL-2.0
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PubL v2 for more details.
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*/
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#define USING_LOG_PREFIX SQL_ENG
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#include "sql/parser/ob_item_type.h"
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#include "lib/oblog/ob_log.h"
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#include "lib/number/ob_number_v2.h"
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#include "sql/engine/expr/ob_expr_cot.h"
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#include "sql/session/ob_sql_session_info.h"
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#include <math.h>
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namespace oceanbase
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{
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using namespace common;
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using namespace common::number;
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namespace sql
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{
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ObExprCot::ObExprCot(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc, T_FUN_SYS_COT, N_COT, 1, NOT_ROW_DIMENSION)
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{
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}
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ObExprCot::~ObExprCot()
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{
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}
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int ObExprCot::calc_result_type1(ObExprResType &type,
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ObExprResType &radian,
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ObExprTypeCtx &type_ctx) const
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{
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return calc_trig_function_result_type1(type, radian, type_ctx);
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}
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int ObExprCot::calc_result1(ObObj &result,
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const ObObj &radian_obj,
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ObExprCtx &expr_ctx) const
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{
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int ret = OB_SUCCESS;
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if (radian_obj.is_null()) {
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result.set_null();
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} else if (OB_ISNULL(expr_ctx.calc_buf_)) {
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ret = OB_NOT_INIT;
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LOG_WARN("expr_ctx.calc_buf_ is NULL", K(ret));
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} else if (radian_obj.is_double()) {
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double arg = radian_obj.get_double();
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double tan_out = tan(arg);
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// to check tan(arg) is small enough to be zero
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if (0.0 == tan_out) {
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ret = OB_INVALID_ARGUMENT;
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LOG_WARN("tan(x) is zero", K(ret));
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} else {
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double res = 1.0/tan_out;
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if (!std::isfinite(res)) {
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ret = OB_INVALID_ARGUMENT;
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LOG_WARN("tan(x) is like zero", K(ret));
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} else {
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result.set_double(res);
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}
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}
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} else {
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ret = OB_ERR_UNEXPECTED;
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}
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return ret;
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}
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} /* sql */
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} /* oceanbase */ |