138 lines
4.6 KiB
C++
138 lines
4.6 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 "ob_expr_atan2.h"
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#include "sql/engine/expr/ob_expr_util.h"
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#include "share/object/ob_obj_cast.h"
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#include "objit/common/ob_item_type.h"
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//#include "sql/engine/expr/ob_expr_promotion_util.h"
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#include "sql/session/ob_sql_session_info.h"
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#include <math.h>
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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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ObExprAtan2::ObExprAtan2(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc, T_FUN_SYS_ATAN2, N_ATAN2, ONE_OR_TWO, VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
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{
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param_lazy_eval_ = true;
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}
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ObExprAtan2::~ObExprAtan2()
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{
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}
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int ObExprAtan2::calc_result_typeN(ObExprResType &type,
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ObExprResType *types,
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int64_t type_num,
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common::ObExprTypeCtx &type_ctx) const
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{
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int ret = OB_SUCCESS;
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if (lib::is_oracle_mode() && OB_UNLIKELY(NULL == types || type_num != 2)) {
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ret = OB_ERR_PARAM_SIZE;
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LOG_WARN("Invalid argument.", K(ret), K(types), K(type_num));
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} else if (lib::is_mysql_mode()
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&& OB_UNLIKELY(NULL == types || type_num <= 0 || type_num > 2)) {
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ret = OB_ERR_PARAM_SIZE;
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LOG_WARN("Invalid argument.", K(ret), K(types), K(type_num));
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} else {
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if (1 == type_num) {
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ret = calc_trig_function_result_type1(type, types[0], type_ctx);
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} else {
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ret = calc_trig_function_result_type2(type, types[0], types[1], type_ctx);
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}
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}
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return ret;
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}
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int calc_atan2_expr(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res_datum)
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{
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int ret = OB_SUCCESS;
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if (1 == expr.arg_cnt_) {
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// only mysql mode
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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 if (ObDoubleType == expr.args_[0]->datum_meta_.type_) {
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const double arg = radian->get_double();
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res_datum.set_double(atan(arg));
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}
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} else { // 2 == expr.arg_cnt_
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// calc atan2(y/x)
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ObExpr *arg0 = expr.args_[0];
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ObExpr *arg1 = expr.args_[1];
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ObDatum *y = NULL;
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ObDatum *x = NULL;
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if (OB_FAIL(arg0->eval(ctx, y))) {
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LOG_WARN("eval arg failed", K(ret), K(expr), KP(y));
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} else if (y->is_null()) {
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/* arg is already be cast to number type, no need to is_null_oracle */
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res_datum.set_null();
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} else if (OB_FAIL(arg1->eval(ctx, x))) {
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LOG_WARN("eval arg failed", K(ret), K(expr), KP(x));
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} else if (x->is_null()) {
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res_datum.set_null();
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} else if (ObNumberType == arg0->datum_meta_.type_
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&& ObNumberType == arg1->datum_meta_.type_) {
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number::ObNumber y_nmb(y->get_number());
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number::ObNumber x_nmb(x->get_number());
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if (y_nmb.is_zero() && x_nmb.is_zero()) {
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ret = OB_NUMERIC_OVERFLOW;
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LOG_WARN("calc atan2(0,0) failed", K(ret));
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} else {
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number::ObNumber res_nmb;
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ObEvalCtx::TempAllocGuard alloc_guard(ctx);
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if (OB_FAIL(y_nmb.atan2(x_nmb, res_nmb, alloc_guard.get_allocator()))) {
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LOG_WARN("calc atan2 failed", K(ret), K(y_nmb), K(x_nmb), K(expr));
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} else {
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res_datum.set_number(res_nmb);
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}
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}
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} else if (ObDoubleType == arg0->datum_meta_.type_
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&& ObDoubleType == arg1->datum_meta_.type_) {
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res_datum.set_double(atan2(y->get_double(), x->get_double()));
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} else {
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ret = OB_ERR_UNEXPECTED;
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}
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}
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return ret;
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}
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int ObExprAtan2::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 (lib::is_oracle_mode() && OB_UNLIKELY(2 != rt_expr.arg_cnt_)) {
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ret = OB_ERR_PARAM_SIZE;
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LOG_WARN("invalid arg cnt of expr", K(ret), K(rt_expr));
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} else if (lib::is_mysql_mode()
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&& OB_UNLIKELY(1 != rt_expr.arg_cnt_ && 2 != rt_expr.arg_cnt_)) {
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ret = OB_ERR_PARAM_SIZE;
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LOG_WARN("invalid arg cnt of expr", K(ret), K(rt_expr));
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} else {
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rt_expr.eval_func_ = calc_atan2_expr;
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}
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return ret;
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}
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} //namespace sql
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} //namespace oceanbase
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