1.介紹需求：

　　python呼叫資料庫，並做邏輯處理，時間為92.5s，從執行sql到得到資料150w條為22s，邏輯處理（2個for迴圈）為60s。前端處理30s，pending為2min左右，需要處理這個問題

　　於是思考解決方案：　　

　　　　1. 取資料時資料拆分　　

 　　　　　　先一個count返回條目，然後多次查詢 　　　　2. 邏輯部分怎麼辦？ 　　　　　　我想用c++處理試試，於是找程式碼，打算用python呼叫c++處理試試 　　　　　　示例： 　　　　　　

#include <iostream>
#include 
 
<string>
#include <cstdlib>

#include <mysql++/mysql++.h>

using namespace std;

#define MYSQL_USER "root"
#define MYSQL_PASSWD "passwd"
#define MYSQL_PORT 3306

int main(){

    mysqlpp::Connection con(false);
    con.set_option(new mysqlpp::SetCharsetNameOption("utf8"
 
));
    if(!con.connect("test","localhost",MYSQL_USER,MYSQL_PASSWD,MYSQL_PORT)){
        cout<<"can't connect,check the user and passwd"<<endl;
        return -1;
    }
    cout<<"mysql connect successfully!"<<endl;

    mysqlpp::Query query=con.query("select * from City
 
");
    mysqlpp::StoreQueryResult result=query.store();
    if(nullptr==result){
        cout<<"query failed!"<<endl;
        return -1;
    }

    for(auto iter=result.begin();iter!=result.end();++iter){
        cout<<"\t"<<(*iter)[0]<<endl;
    }

    return 0;
}

View Code

報錯：

/opt/code/testC++/tcp_server/test_server_1/main.cpp:5:10: fatal error: mysql++/mysql++.h: 沒有那個檔案或目錄
 #include <mysql++/mysql++.h>

 

2. 怎麼安裝<mysql++/mysql++.h>標頭檔案

系統環境：

　　debian系統kali

1. 配置

debian： 
　　apt-get install libmysqlclient-dev
redhat：

　　yum install mysql-devel

發現沒有，就這麼幹，根據不同系統因地制宜

 

apt-cache search libmysql
發現沒有
apt-get update更新源
apt-cache search libmysql 有了類似的了
apt-get install default-libmysqlclient-dev default-libmysqld-dev

 

 

 

 

2. 下載解壓安裝：

[[email protected] 下載]#wget https://tangentsoft.com/mysqlpp/releases/mysql++-3.2.4.tar.gz

[[email protected] 下載]# tar zxvf mysql++-3.2.2.tar.gz 

進入mysql++目錄下，開始編譯，先執行./configure生成makefile檔案，之後再make，編譯出libmysqlpp.so庫檔案：

./configure

報錯：

 下面這段來自blog：https://blog.csdn.net/daodaozhu05/article/details/12970657

checking for MySQL include directory... configure: error: Didn't find the MySQL include dir in '
/usr/include/mysql 
/usr/local/include/mysql 
/usr/local/mysql/include 
/usr/local/mysql/include/mysql 
/usr/mysql/include/mysql 
/opt/mysql/include/mysql 
/sw/include/mysql'

 

這個有兩種情況，這個是第一種

 

 

首先查詢本地libmysqlclient的目錄在哪裡，在終端敲下面的命令：

locate libmysqlclient

 

sudo ./configure --with-mysql-lib=/usr/lib/x86_64-linux-gnu

如果還出現剛才的問題

Didn't find the mysql in ......

這是用--with-mysql-include選項進行安裝，比如我的mysqlclient lib在/opt/local/lib/mysql5/mysql, 而mysql 在/opt/local/include/mysql5/mysql，則用下列命令安裝一遍即可。

sudo ./configure --with-mysql-lib=/opt/local/lib/mysql5/mysql/ --with-mysql-include=/opt/local/include/mysql5/mysql/

 

3.編譯並安裝

sudo make

sudo make install

 

第二種方法：

apt-cache search libmysql
發現沒有
apt-get update更新源

apt-cache search libmysql 有了類似的了

apt-get install default-libmysqlclient-dev default-libmysqld-dev

[email protected]:/usr/local/lib# apt-cache search libmysql
default-libmysqlclient-dev - MySQL database development files (metapackage)
default-libmysqld-dev - MySQL embedded database development files (metapackage)
libcrypt-mysql-perl - Perl module to emulate the MySQL PASSWORD() function
libglpk40 - linear programming kit with integer (MIP) support
libmariadbclient-dev-compat - MariaDB database development files (libmysqlclient compatibility)
libmysql-diff-perl - module for comparing the table structure of two MySQL databases
libmysql-ocaml - OCaml bindings for MySql (runtime package)
libmysql-ocaml-dev - OCaml bindings for MySql (development package)
libmysqlcppconn-dev - MySQL Connector for C++ (development files)
libmysqlcppconn7v5 - MySQL Connector for C++ (library)
libreoffice-base-drivers - Database connectivity drivers for LibreOffice
node-mysql - MySQL client implementation for Node.js
solr-common - Enterprise search server based on Lucene3 - common files

 

然後直接也OK

./configure

 make 

 make install

 

 

 

 3.執行c++程式碼執行測試

#include <mysql++.h>

int main()

{

    mysqlpp::String greeting("Hello, world!");

    std::cout << greeting << std::endl;

    return 0;

}

 

 

g++ test.cpp -o test.so

./test.so