SQLite3 sqlite3_step函数的性能问题

如何解决SQLite3 sqlite3_step函数的性能问题

| 使用

sqlite3_step

函数时，特定查询存在问题：

SELECT DISTINCT interfaces_int_id,device_dev_id FROM devInterface 
INNER JOIN interfaces ON devInterface.interfaces_int_id=interfaces.intf_id 
INNER JOIN nlink ON nlink.interfaces_intf_id=interfaces.intf_id 
INNER JOIN neighbor ON neighbor.neighbor_id=nlink.neighbor_neighbor_id 

我只发布了查询的相关部分。 为了查询数据库，我使用此代码。 调试时，它挂在

    while(true)
    {
--->    result = sqlite3_step(statement);

        if(result == SQLITE_ROW)
        {
            std::vector<std::string> values;
            ...
        }
        ...
    }

根据数据库的大小，有时可能需要几分钟才能得到结果。但是，使用Firefox插件“ SQLite Manager”时，只需1-2秒。 在查询花费几分钟的情况下，\“ neighbor \”和\“ nlink \”表具有超过15万个条目。 为了建立数据库，我使用了MySQL Workbench工具的Forward Engineer功能，并修改了语法以使其可用于sqlite3：

CREATE TABLE IF NOT EXISTS device(dev_id INTEGER PRIMARY KEY AUTOINCREMENT,type INT,hwtype INT,dataSource INT,hostname TEXT,sw_version TEXT,stpBridgeID TEXT,stpProtocol TEXT);

CREATE TABLE IF NOT EXISTS interfaces(intf_id INTEGER PRIMARY KEY AUTOINCREMENT,intfName TEXT,intfType TEXT,phl INT,macAddress TEXT,ipAddress TEXT,subnetMask TEXT,duplex TEXT,speed TEXT,status TEXT,description TEXT,l2l3 TEXT,errLvl INT,loadLvl INT,channel_intf_id INT,vpc_id INT,CONSTRAINT fk_interfaces_interfaces1 FOREIGN KEY (channel_intf_id) REFERENCES interfaces (intf_id) ON DELETE CASCADE ON UPDATE CASCADE);

CREATE TABLE IF NOT EXISTS devInterface (interfaces_int_id INT,device_dev_id INT,cdp_cdp_id INT,PRIMARY KEY (interfaces_int_id,device_dev_id,cdp_cdp_id),CONSTRAINT fk_dev_interface_interfaces1 FOREIGN KEY (interfaces_int_id) REFERENCES interfaces (intf_id) ON DELETE CASCADE ON UPDATE CASCADE,CONSTRAINT fk_dev_interface_device1 FOREIGN KEY (device_dev_id) REFERENCES device (dev_id) ON DELETE CASCADE ON UPDATE CASCADE,CONSTRAINT fk_devInterface_cdp1 FOREIGN KEY (cdp_cdp_id) REFERENCES cdp (cdp_id) ON DELETE CASCADE ON UPDATE CASCADE);

CREATE TABLE IF NOT EXISTS neighbor (neighbor_id INTEGER PRIMARY KEY AUTOINCREMENT,l2_addr TEXT NULL,l3_addr TEXT NULL);

CREATE TABLE IF NOT EXISTS nlink (neighbor_neighbor_id INT,interfaces_intf_id INT,PRIMARY KEY (neighbor_neighbor_id,interfaces_intf_id),CONSTRAINT fk_table1_neighbor1  FOREIGN KEY (neighbor_neighbor_id ) REFERENCES neighbor (neighbor_id) ON DELETE CASCADE ON UPDATE CASCADE,CONSTRAINT fk_table1_interfaces1 FOREIGN KEY (interfaces_intf_id) REFERENCES interfaces (intf_id) ON DELETE CASCADE ON UPDATE CASCADE);  

编辑：SQLITE版本：3.6.22     

解决方法

将SQLite升级到最新版本（3.7.6.2）后，性能会好得多。