42 lines
1.4 KiB
C++
42 lines
1.4 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/resolver/cmd/ob_empty_query_resolver.h"
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#include "sql/resolver/cmd/ob_empty_query_stmt.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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int ObEmptyQueryResolver::resolve(const ParseNode &parse_tree)
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{
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int ret = OB_SUCCESS;
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ObEmptyQueryStmt *empty_query_stmt = NULL;
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if (T_EMPTY_QUERY != parse_tree.type_
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&& T_LOCK_TABLE != parse_tree.type_) {
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ret = OB_ERR_UNEXPECTED;
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LOG_ERROR("parser tree type is not T_EMPTY_QUERY", K(parse_tree.type_), K(ret));
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} else if (0 == parse_tree.value_) {
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//empty query with no comment
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ret = OB_ERR_EMPTY_QUERY;
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} else if (OB_ISNULL(empty_query_stmt = create_stmt<ObEmptyQueryStmt>())) {
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ret = OB_SQL_RESOLVER_NO_MEMORY;
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LOG_WARN("failed to create empty query stmt", K(ret));
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} else {}
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return ret;
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}
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} // sql
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} // oceanbase
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