90 lines
2.6 KiB
C++
90 lines
2.6 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/engine/expr/ob_expr_degrees.h"
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#include "lib/number/ob_number_v2.h"
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#include "sql/engine/expr/ob_expr_util.h"
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#include "objit/common/ob_item_type.h"
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#include "sql/session/ob_sql_session_info.h"
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#include <cmath>
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using namespace oceanbase::common;
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using namespace oceanbase::sql;
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namespace oceanbase
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{
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namespace sql
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{
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const double ObExprDegrees::degrees_ratio_ = 180.0/std::acos(-1);
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ObExprDegrees::ObExprDegrees(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc, T_FUN_SYS_DEGREES, N_DEGREES, 1, VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
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{
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}
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ObExprDegrees::~ObExprDegrees()
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{
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}
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int ObExprDegrees::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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UNUSED(type_ctx);
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int ret = OB_SUCCESS;
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if (NOT_ROW_DIMENSION != row_dimension_ || ObMaxType == radian.get_type()) {
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ret = OB_ERR_INVALID_TYPE_FOR_OP;
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} else {
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type.set_double();
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radian.set_calc_type(ObDoubleType);
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ObExprOperator::calc_result_flag1(type, radian);
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}
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return ret;
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}
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int ObExprDegrees::calc_degrees_expr(const ObExpr &expr, ObEvalCtx &ctx,
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ObDatum &res_datum)
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{
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int ret = OB_SUCCESS;
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ObDatum * radian = NULL;
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if (OB_FAIL(expr.args_[0]->eval(ctx, radian))) {
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LOG_WARN("eval radian arg failed", K(ret), K(expr));
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} else if (radian->is_null()) {
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res_datum.set_null();
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} else {
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const double val = radian->get_double();
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// cal result;
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res_datum.set_double(val * degrees_ratio_);
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}
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return ret;
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}
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int ObExprDegrees::cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const
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{
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int ret = OB_SUCCESS;
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UNUSED(expr_cg_ctx);
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UNUSED(raw_expr);
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if (OB_UNLIKELY(1 != rt_expr.arg_cnt_) ||
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(ObDoubleType != rt_expr.args_[0]->datum_meta_.type_)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("invalid arg_cnt_ or res type is invalid", K(ret), K(rt_expr));
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} else {
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rt_expr.eval_func_ = calc_degrees_expr;
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}
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return ret;
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}
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}
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}
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