142 lines
4.1 KiB
C++
142 lines
4.1 KiB
C++
/**
|
|
* 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 <math.h>
|
|
#include "share/object/ob_obj_cast.h"
|
|
#include "sql/engine/expr/ob_expr_ln.h"
|
|
#include "sql/session/ob_sql_session_info.h"
|
|
#include "lib/number/ob_number_v2.h"
|
|
|
|
namespace oceanbase
|
|
{
|
|
using namespace oceanbase::common;
|
|
|
|
namespace sql
|
|
{
|
|
ObExprLn::ObExprLn(ObIAllocator &alloc)
|
|
: ObFuncExprOperator(alloc, T_FUN_SYS_LN, N_LN, 1, VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
|
|
{
|
|
}
|
|
|
|
ObExprLn::~ObExprLn()
|
|
{
|
|
}
|
|
|
|
int ObExprLn::calc_result_type1(ObExprResType &type,
|
|
ObExprResType &type1,
|
|
common::ObExprTypeCtx &type_ctx) const
|
|
{
|
|
return calc_trig_function_result_type1(type, type1, type_ctx);
|
|
}
|
|
|
|
int calc_ln_expr_mysql(const ObExpr &expr, ObEvalCtx &ctx,
|
|
ObDatum &res_datum)
|
|
{
|
|
int ret = OB_SUCCESS;
|
|
ObDatum *arg = NULL;
|
|
if (OB_FAIL(expr.args_[0]->eval(ctx, arg))) {
|
|
LOG_WARN("eval arg failed", K(ret), K(expr));
|
|
} else if (arg->is_null()) {
|
|
res_datum.set_null();
|
|
} else {
|
|
double val = arg->get_double();
|
|
if (val <= 0) {
|
|
LOG_USER_WARN(OB_EER_INVALID_ARGUMENT_FOR_LOGARITHM);
|
|
res_datum.set_null();
|
|
} else {
|
|
res_datum.set_double(std::log(val));
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int calc_ln_expr_oracle_double(const ObExpr &expr, ObEvalCtx &ctx,
|
|
ObDatum &res_datum)
|
|
{
|
|
int ret = OB_SUCCESS;
|
|
ObDatum *arg = NULL;
|
|
if (OB_FAIL(expr.args_[0]->eval(ctx, arg))) {
|
|
LOG_WARN("eval arg failed", K(ret), K(expr));
|
|
} else if (arg->is_null()) {
|
|
res_datum.set_null();
|
|
} else {
|
|
double val = arg->get_double();
|
|
if (val == 0) {
|
|
res_datum.set_double(-INFINITY);
|
|
} else if (val < 0) {
|
|
res_datum.set_double(NAN);
|
|
} else {
|
|
res_datum.set_double(std::log(val));
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int calc_ln_expr_oracle_number(const ObExpr &expr, ObEvalCtx &ctx,
|
|
ObDatum &res_datum)
|
|
{
|
|
int ret = OB_SUCCESS;
|
|
ObDatum *arg = NULL;
|
|
if (OB_FAIL(expr.args_[0]->eval(ctx, arg))) {
|
|
LOG_WARN("eval arg failed", K(ret), K(expr));
|
|
} else if (arg->is_null()) {
|
|
res_datum.set_null();
|
|
} else {
|
|
const number::ObNumber arg_nmb(arg->get_number());
|
|
number::ObNumber res_nmb;
|
|
ObEvalCtx::TempAllocGuard alloc_guard(ctx);
|
|
if (OB_FAIL(arg_nmb.ln(res_nmb, alloc_guard.get_allocator()))) {
|
|
LOG_WARN("calc ln failed", K(ret), K(arg_nmb), K(res_nmb));
|
|
} else {
|
|
res_datum.set_number(res_nmb);
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int ObExprLn::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 (OB_UNLIKELY(1 != rt_expr.arg_cnt_)) {
|
|
ret = OB_ERR_UNEXPECTED;
|
|
LOG_WARN("invalid arg_cnt_ of expr", K(ret), K(rt_expr));
|
|
} else {
|
|
ObObjType arg_res_type = rt_expr.args_[0]->datum_meta_.type_;
|
|
if (!lib::is_oracle_mode()) {
|
|
if (ObDoubleType == arg_res_type) {
|
|
rt_expr.eval_func_ = calc_ln_expr_mysql;
|
|
} else {
|
|
ret = OB_ERR_UNEXPECTED;
|
|
LOG_WARN("arg_res_type must be double in mysql mode", K(ret), K(arg_res_type));
|
|
}
|
|
} else {
|
|
if (ObDoubleType == arg_res_type) {
|
|
rt_expr.eval_func_ = calc_ln_expr_oracle_double;
|
|
} else if (ObNumberType == arg_res_type) {
|
|
rt_expr.eval_func_ = calc_ln_expr_oracle_number;
|
|
} else {
|
|
ret = OB_ERR_UNEXPECTED;
|
|
LOG_WARN("arg type must be double or number in oracle mode", K(ret),
|
|
K(arg_res_type), K(rt_expr));
|
|
}
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
} // namespace sql
|
|
} // namespace oceanbase
|