d73d205de7
1. Support limit clause push down both odbc table and mysql table. 2. Code refactor of ODBC Scan Node, change `build_connect_string` and `query_string` from BE to FE to make it easily to modify
79 lines
2.1 KiB
C++
79 lines
2.1 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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#ifndef DORIS_BE_SRC_QUERY_EXEC_MYSQL_SCANNER_H
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#define DORIS_BE_SRC_QUERY_EXEC_MYSQL_SCANNER_H
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#include <stdlib.h>
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#include <string>
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#include <vector>
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#include "common/status.h"
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#ifndef __DorisMysql
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#define __DorisMysql void
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#endif
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#ifndef __DorisMysqlRes
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#define __DorisMysqlRes void
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#endif
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namespace doris {
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struct MysqlScannerParam {
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std::string host;
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std::string port;
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std::string user;
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std::string passwd;
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std::string db;
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unsigned long client_flag;
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MysqlScannerParam(): client_flag(0) { }
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};
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// Mysql Scanner for scan data from mysql
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class MysqlScanner {
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public:
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MysqlScanner(const MysqlScannerParam& param);
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~MysqlScanner();
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Status open();
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Status query(const std::string& query);
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// query for DORIS
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Status query(const std::string& table, const std::vector<std::string>& fields,
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const std::vector<std::string>& filters, const uint64_t limit);
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Status get_next_row(char** *buf, unsigned long** lengths, bool* eos);
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int field_num() const {
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return _field_num;
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}
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private:
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Status _error_status(const std::string& prefix);
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const MysqlScannerParam& _my_param;
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__DorisMysql* _my_conn;
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__DorisMysqlRes* _my_result;
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std::string _sql_str;
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bool _is_open;
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int _field_num;
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};
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}
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#endif
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