使用statement进行绑定查询
使用statement可以提前构建查询语法树,在查询时不再需要构建语法树就直接查询.因此可以很好的提高查询的效率.这个方法适合于查询条件固定但查询非常频繁的场合.
insertbind[4].buffer_type=MYSQL_TYPE_SHORT;
insertbind[4].buffer=(char*)&m_stInsertParam->externalPort;
insertbind[4].is_null=0;
insertbind[4].length=0;
insertbind[5].buffer_type=MYSQL_TYPE_LONG;
insertbind[5].buffer=(char*)&m_stInsertParam->internalIP;
insertbind[5].is_null=0;
insertbind[5].length=0;
insertbind[6].buffer_type=MYSQL_TYPE_SHORT;
insertbind[6].buffer=(char*)&m_stInsertParam->internalPort;
insertbind[6].is_null=0;
insertbind[6].is_null=0;
//绑定
if(mysql_stmt_bind_param(m_stInsertStmt,insertbind))
returnfalse;
returntrue;
}
提高MySQL数据库查询效率的技巧是什么
//2.查询
boolCDBManager::InsertHostCache2(MYSQL*connecthandle,char*sessionid,char*channelid,intISPtype,\
unsignedinteIP,unsignedshorteport,unsignedintiIP,unsignedshortiport)
{
//填充结构变量m_sInsertParam
strcpy(m_stInsertParam->sessionid,sessionid);
strcpy(m_stInsertParam->channelid,channelid);
m_stInsertParam->ISPtype=ISPtype;
m_stInsertParam->externalIP=eIP;
m_stInsertParam->externalPort=eport;
m_stInsertParam->internalIP=iIP;
m_stInsertParam->internalPort=iport;
//执行statement,性能瓶颈处
if(mysql_stmt_execute(m_stInsertStmt))
returnfalse;
returntrue;
}
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