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oceanbase-admin
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src/sql/engine/expr/ob_expr_sqrt.cpp
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213
src/sql/engine/expr/ob_expr_sqrt.cpp
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/**
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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_sqrt.h"
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#include <cmath>
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#include "share/object/ob_obj_cast.h"
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#include "sql/parser/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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using namespace oceanbase::common;
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using namespace oceanbase::sql;
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namespace oceanbase {
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namespace sql {
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ObExprSqrt::ObExprSqrt(ObIAllocator& alloc) : ObFuncExprOperator(alloc, T_FUN_SYS_SQRT, N_SQRT, 1, NOT_ROW_DIMENSION)
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{}
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ObExprSqrt::~ObExprSqrt()
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{}
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int ObExprSqrt::calc_result_type1(ObExprResType& type, ObExprResType& type1, common::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 == type1.get_type()) {
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ret = OB_ERR_INVALID_TYPE_FOR_OP;
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} else if (!share::is_oracle_mode()) {
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type.set_double();
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} else {
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if (ob_is_real_type(type1.get_type())) {
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type.set_type(type1.get_type());
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} else {
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type.set_number();
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}
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type.set_scale(ObAccuracy::DDL_DEFAULT_ACCURACY2[ORACLE_MODE][type.get_type()].get_scale());
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type.set_precision(ObAccuracy::DDL_DEFAULT_ACCURACY2[ORACLE_MODE][type.get_type()].get_precision());
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}
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type1.set_calc_type(type.get_type());
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ObExprOperator::calc_result_flag1(type, type1);
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return ret;
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}
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int ObExprSqrt::calc_result1(ObObj& result, const ObObj& obj, ObExprCtx& expr_ctx) const
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{
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int ret = OB_SUCCESS;
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if (OB_ISNULL(expr_ctx.calc_buf_)) {
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ret = OB_NOT_INIT;
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LOG_WARN("varchar buffer not init", K(ret));
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} else if (obj.is_null()) {
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result.set_null();
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} else if (lib::is_oracle_mode()) {
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if (obj.is_number()) {
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const number::ObNumber arg_number = obj.get_number();
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number::ObNumber result_number;
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common::ObIAllocator& allocator = *(expr_ctx.calc_buf_);
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if (OB_FAIL(arg_number.sqrt(result_number, allocator))) {
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LOG_WARN("sqrt failed", K(ret), K(arg_number), K(result_number));
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} else {
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result.set_number(result_number);
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LOG_DEBUG("ObExprSqrt, ObNumber path end successfully");
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}
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} else if (obj.is_double()) {
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double value = obj.get_double();
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if (value < 0) {
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ret = OB_ERR_ARGUMENT_OUT_OF_RANGE;
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} else if (value == -0) {
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result.set_double(-0);
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} else {
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result.set_double(sqrt(value));
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}
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} else if (obj.is_float()) {
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float value = obj.get_float();
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if (value < 0) {
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ret = OB_ERR_ARGUMENT_OUT_OF_RANGE;
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} else if (value == -0) {
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result.set_float(-0);
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} else {
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result.set_float(sqrtf(value));
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}
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} else {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("obj type should be number or float, double", K(obj), K(ret));
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}
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} else {
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if (obj.is_double()) {
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double value = obj.get_double();
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if (value < 0) {
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result.set_null();
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} else {
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result.set_double(sqrt(value));
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}
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} else {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("obj type should be double", K(obj), K(ret));
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}
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}
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return ret;
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}
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int calc_sqrt_expr_mysql(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& res_datum)
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{
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int ret = OB_SUCCESS;
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ObDatum* arg = NULL;
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if (OB_FAIL(expr.args_[0]->eval(ctx, arg))) {
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LOG_WARN("eval arg failed", K(ret), K(expr));
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} else if (arg->is_null()) {
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res_datum.set_null();
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} else {
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double val = arg->get_double();
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if (val < 0) {
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res_datum.set_null();
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} else {
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res_datum.set_double(std::sqrt(val));
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}
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}
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return ret;
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}
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int calc_sqrt_expr_oracle_double(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& res_datum)
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{
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int ret = OB_SUCCESS;
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ObDatum* arg = NULL;
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if (OB_FAIL(expr.args_[0]->eval(ctx, arg))) {
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LOG_WARN("eval arg failed", K(ret), K(expr));
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} else if (arg->is_null()) {
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res_datum.set_null();
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} else {
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ObObjType arg_type = expr.args_[0]->datum_meta_.type_;
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if (ObDoubleType == arg_type) {
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double val = arg->get_double();
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if (val < 0) {
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ret = OB_ERR_ARGUMENT_OUT_OF_RANGE;
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} else {
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res_datum.set_double(std::sqrt(val));
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}
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} else if (ObFloatType == arg_type) {
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float val = arg->get_float();
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if (val < 0) {
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ret = OB_ERR_ARGUMENT_OUT_OF_RANGE;
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} else {
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res_datum.set_float(sqrtf(val));
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}
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} else {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("unexpected arg type", K(ret), K(arg_type));
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}
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}
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return ret;
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}
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int calc_sqrt_expr_oracle_number(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& res_datum)
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{
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int ret = OB_SUCCESS;
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ObDatum* arg = NULL;
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if (OB_FAIL(expr.args_[0]->eval(ctx, arg))) {
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LOG_WARN("eval arg failed", K(ret), K(expr));
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} else if (arg->is_null()) {
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res_datum.set_null();
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} else {
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const number::ObNumber arg_nmb(arg->get_number());
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number::ObNumber res_nmb;
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if (OB_FAIL(arg_nmb.sqrt(res_nmb, ctx.get_reset_tmp_alloc()))) {
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LOG_WARN("calc sqrt failed", K(ret), K(arg_nmb), K(res_nmb));
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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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return ret;
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}
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int ObExprSqrt::cg_expr(ObExprCGCtx& expr_cg_ctx, const ObRawExpr& raw_expr, 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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ret = OB_ERR_UNEXPECTED;
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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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ObObjType arg_res_type = rt_expr.args_[0]->datum_meta_.type_;
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if (share::is_oracle_mode()) {
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if (ObDoubleType == arg_res_type || ObFloatType == arg_res_type) {
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rt_expr.eval_func_ = calc_sqrt_expr_oracle_double;
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} else if (ObNumberType == arg_res_type) {
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rt_expr.eval_func_ = calc_sqrt_expr_oracle_number;
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} else {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("arg type must be double or number in oracle mode", K(ret), K(arg_res_type), K(rt_expr));
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}
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} else {
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if (ObDoubleType == arg_res_type) {
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rt_expr.eval_func_ = calc_sqrt_expr_mysql;
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} else {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("arg_res_type must be double in mysql mode", K(ret), K(arg_res_type));
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}
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}
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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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