/**

* 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.

*/

#include "sql/resolver/cmd/ob_help_stmt.h"

using namespace oceanbase::common;

using namespace oceanbase::sql;

ObHelpStmt::ObHelpStmt()

:ObDMLStmt(stmt::T_HELP),

row_store_(),

col_names_()

{

}

ObHelpStmt::~ObHelpStmt()

{

}

int ObHelpStmt::add_col_name(ObString col_name)

{

int ret = OB_SUCCESS;

if (OB_FAIL(col_names_.push_back(col_name))) {

SQL_RESV_LOG(WARN, "fail to push back column name", K(ret), K(col_name));

}

return ret;

}

int ObHelpStmt::get_col_name(int64_t idx, ObString &col_name)

{

int ret = OB_SUCCESS;

if (OB_UNLIKELY(idx < 0 || idx >= col_names_.count())) {

ret = OB_INVALID_ARGUMENT;

SQL_RESV_LOG(

WARN, "invalid argument", K(ret), K(idx), K(col_names_.count()));

} else {

col_name = col_names_.at(idx);

}

return ret;

}