52 lines
1.8 KiB
C++
52 lines
1.8 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 "sql/engine/expr/ob_expr_connect_by_root.h"
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#include "sql/engine/expr/ob_expr_result_type_util.h"
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#include "share/ob_i_sql_expression.h"
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using namespace oceanbase::sql;
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using namespace oceanbase::common;
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ObExprConnectByRoot::ObExprConnectByRoot(common::ObIAllocator &alloc)
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: ObExprOperator(alloc, T_OP_CONNECT_BY_ROOT, N_CONNECT_BY_ROOT, 1, NOT_ROW_DIMENSION, INTERNAL_IN_MYSQL_MODE) {};
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int ObExprConnectByRoot::calc_result_type1(ObExprResType &type, ObExprResType &type1, ObExprTypeCtx &type_ctx) const
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{
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int ret = OB_SUCCESS;
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type = type1;
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UNUSED(type_ctx);
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return ret;
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}
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int ObExprConnectByRoot::cg_expr(ObExprCGCtx &, const ObRawExpr &, ObExpr &rt_expr) const
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{
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int ret = OB_SUCCESS;
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CK(1 == rt_expr.arg_cnt_);
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rt_expr.eval_func_ = ObExprConnectByRoot::eval_connect_by_root;
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return ret;
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}
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int ObExprConnectByRoot::eval_connect_by_root(const ObExpr &expr,
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ObEvalCtx &ctx,
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ObDatum &expr_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.eval_param_value(ctx, arg))) {
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LOG_WARN("expression evaluate parameters failed", K(ret));
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} else {
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expr_datum.set_datum(*arg);
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}
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return ret;
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}
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