Question

如果使用sqlite，大批量的插入数据，需要做哪些优化

Answer 1

在数据库的sql语句前加："begin;" 结束后加“commit;”；

string strSql;
strSql += "begin;\n";
for (unsigned int i = 0 ; i < v.Size(); ++i)
{
//unsigned int i = 0;

const rapidjson::Value &val = v[i];

auto month = new MothData();
month->initWithDictionary(val);

strSql += StringUtils::format("INSERT INTO Car_mqpfl(father_code, organ_code, organ_name, report_name, stat_month,mqpfl_dn,mqpfl_qn,mqpfl_sn,xh) VALUES ('%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s' , '%d');\n",month->father_code.c_str(),month->organ_code.c_str(),month->organ_name.c_str(),month->report_name.c_str(),month->stat_month.c_str(),month->mqpfl_dn.c_str(),month->mqpfl_qn.c_str(),month->mqpfl_sn.c_str(),month->xh);
}
strSql+= "commit;\n";
SqlDB::insertData(strSql);

void SqlDB::insertData(std::string sql)
{
result = sqlite3_exec(_db, sql.c_str(), nullptr, nullptr, &errMsg);

if (result != SQLITE_OK) {
log("insert error , code = %d, message = %s\n",result,errMsg);
}
}