67 lines
1.6 KiB
C++
67 lines
1.6 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 "sql/engine/expr/ob_expr_pi.h"
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#include "objit/common/ob_item_type.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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{
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namespace sql
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{
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const double ObExprPi::mysql_pi_ = 3.14159265358979323846264338327950288;
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ObExprPi::ObExprPi(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc, T_FUN_SYS_PI, N_PI, 0, VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
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{
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}
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ObExprPi::~ObExprPi()
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{
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}
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int ObExprPi::calc_result_type0(ObExprResType &type, ObExprTypeCtx &type_ctx) const
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{
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UNUSED(type_ctx);
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type.set_double();
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type.set_precision(8);
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type.set_scale(6);
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return OB_SUCCESS;
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}
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int ObExprPi::eval_pi(const ObExpr &expr, ObEvalCtx &ctx,
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ObDatum &expr_datum)
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{
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UNUSED(expr);
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UNUSED(ctx);
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int ret = OB_SUCCESS;
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expr_datum.set_double(mysql_pi_);
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return ret;
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}
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int ObExprPi::cg_expr(ObExprCGCtx &op_cg_ctx, const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const
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{
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UNUSED(op_cg_ctx);
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UNUSED(raw_expr);
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rt_expr.eval_func_ = ObExprPi::eval_pi;
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return OB_SUCCESS;
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}
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} //namespace sql
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} //namespace oceanbase
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