375c1bf5c0
This patch supports utf8mb4 for mysql external table. if someone needs a mysql external table with utf8mb4 charset, but only support charset utf8 right now. When create mysql external table, it can add an optional propertiy "charset" which can set character fom mysql connection, default value is "utf8". You can set "utf8mb4" instead of "utf8" when you need.
76 lines
2.0 KiB
C++
76 lines
2.0 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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#pragma once
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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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std::string charset;
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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 { return _field_num; }
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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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} // namespace doris
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