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Copy pathob_expr_atan2.cpp
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129 lines (121 loc) · 4.11 KB
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/*
* Copyright (c) 2025 OceanBase.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define USING_LOG_PREFIX SQL_ENG
#include "ob_expr_atan2.h"
using namespace oceanbase::common;
using namespace oceanbase::sql;
namespace oceanbase
{
namespace sql
{
ObExprAtan2::ObExprAtan2(ObIAllocator &alloc)
: ObFuncExprOperator(alloc, T_FUN_SYS_ATAN2, N_ATAN2, ONE_OR_TWO, VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
{
param_lazy_eval_ = true;
}
ObExprAtan2::~ObExprAtan2()
{
}
int ObExprAtan2::calc_result_typeN(ObExprResType &type,
ObExprResType *types,
int64_t type_num,
common::ObExprTypeCtx &type_ctx) const
{
int ret = OB_SUCCESS;
if (lib::is_mysql_mode()
&& OB_UNLIKELY(NULL == types || type_num <= 0 || type_num > 2)) {
ret = OB_ERR_PARAM_SIZE;
LOG_WARN("Invalid argument.", K(ret), K(types), K(type_num));
} else {
if (1 == type_num) {
ret = calc_trig_function_result_type1(type, types[0], type_ctx);
} else {
ret = calc_trig_function_result_type2(type, types[0], types[1], type_ctx);
}
}
return ret;
}
int calc_atan2_expr(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res_datum)
{
int ret = OB_SUCCESS;
if (1 == expr.arg_cnt_) {
// only mysql mode
ObDatum *radian = NULL;
if (OB_FAIL(expr.args_[0]->eval(ctx, radian))) {
LOG_WARN("eval radian arg failed", K(ret), K(expr));
} else if (radian->is_null()) {
res_datum.set_null();
} else if (ObDoubleType == expr.args_[0]->datum_meta_.type_) {
const double arg = radian->get_double();
res_datum.set_double(atan(arg));
}
} else { // 2 == expr.arg_cnt_
// calc atan2(y/x)
ObExpr *arg0 = expr.args_[0];
ObExpr *arg1 = expr.args_[1];
ObDatum *y = NULL;
ObDatum *x = NULL;
if (OB_FAIL(arg0->eval(ctx, y))) {
LOG_WARN("eval arg failed", K(ret), K(expr), KP(y));
} else if (y->is_null()) {
/* arg is already be cast to number type, no need to is_null_oracle */
res_datum.set_null();
} else if (OB_FAIL(arg1->eval(ctx, x))) {
LOG_WARN("eval arg failed", K(ret), K(expr), KP(x));
} else if (x->is_null()) {
res_datum.set_null();
} else if (ObNumberType == arg0->datum_meta_.type_
&& ObNumberType == arg1->datum_meta_.type_) {
number::ObNumber y_nmb(y->get_number());
number::ObNumber x_nmb(x->get_number());
if (y_nmb.is_zero() && x_nmb.is_zero()) {
ret = OB_NUMERIC_OVERFLOW;
LOG_WARN("calc atan2(0,0) failed", K(ret));
} else {
number::ObNumber res_nmb;
ObEvalCtx::TempAllocGuard alloc_guard(ctx);
if (OB_FAIL(y_nmb.atan2(x_nmb, res_nmb, alloc_guard.get_allocator()))) {
LOG_WARN("calc atan2 failed", K(ret), K(y_nmb), K(x_nmb), K(expr));
} else {
res_datum.set_number(res_nmb);
}
}
} else if (ObDoubleType == arg0->datum_meta_.type_
&& ObDoubleType == arg1->datum_meta_.type_) {
res_datum.set_double(atan2(y->get_double(), x->get_double()));
} else {
ret = OB_ERR_UNEXPECTED;
}
}
return ret;
}
int ObExprAtan2::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);
if (lib::is_mysql_mode()
&& OB_UNLIKELY(1 != rt_expr.arg_cnt_ && 2 != rt_expr.arg_cnt_)) {
ret = OB_ERR_PARAM_SIZE;
LOG_WARN("invalid arg cnt of expr", K(ret), K(rt_expr));
} else {
rt_expr.eval_func_ = calc_atan2_expr;
}
return ret;
}
} //namespace sql
} //namespace oceanbase