92 lines
2.8 KiB
C++
92 lines
2.8 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 <math.h>
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#include "share/object/ob_obj_cast.h"
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#include "sql/engine/expr/ob_expr_power.h"
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#include "sql/engine/expr/ob_expr_pow.h"
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#include "sql/session/ob_sql_session_info.h"
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#include "lib/number/ob_number_v2.h"
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namespace oceanbase
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{
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using namespace oceanbase::common;
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namespace sql
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{
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ObExprPower::ObExprPower(ObIAllocator &alloc)
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: ObExprOperator(alloc, T_FUN_SYS_POWER, N_POWER, 2, VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
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{
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}
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int ObExprPower::calc_result_type2(ObExprResType &type,
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ObExprResType &type1,
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ObExprResType &type2,
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ObExprTypeCtx &type_ctx) const
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{
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return calc_trig_function_result_type2(type, type1, type2, type_ctx);
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}
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int calc_power_expr_oracle(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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// power(base, exp)
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ObDatum *base = NULL;
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ObDatum *exp = NULL;
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if (OB_FAIL(expr.args_[0]->eval(ctx, base)) ||
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OB_FAIL(expr.args_[1]->eval(ctx, exp))) {
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LOG_WARN("eval arg failed", K(ret), K(expr));
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} else if (base->is_null() || exp->is_null()) {
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res_datum.set_null();
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} else {
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if (ObDoubleType == expr.datum_meta_.type_) {
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ret = ObExprPow::safe_set_double(res_datum,
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std::pow(base->get_double(),
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exp->get_double()));
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} else {
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const number::ObNumber base_nmb(base->get_number());
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const number::ObNumber exp_nmb(exp->get_number());
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number::ObNumber res_nmb;
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ObEvalCtx::TempAllocGuard alloc_guard(ctx);
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if (OB_FAIL(base_nmb.power(exp_nmb, res_nmb, alloc_guard.get_allocator()))) {
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LOG_WARN("calc power failed", K(ret), K(base_nmb), K(exp_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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}
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return ret;
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}
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int ObExprPower::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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CK (2 == raw_expr.get_param_count());
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if (OB_SUCC(ret)) {
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if (lib::is_oracle_mode()) {
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rt_expr.eval_func_ = calc_power_expr_oracle;
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} else {
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rt_expr.eval_func_ = ObExprPow::calc_pow_expr;
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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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