private ImpalaClient Connect(string connectString)
{
if (!connectString.StartsWith(PREFIX))
{
throw new ArgumentException("Invalid connection string!");
}
var hostPort = connectString.Substring(PREFIX.Length).Split(":");
var host = hostPort[0];
var port = Int32.Parse(hostPort[1]);
return(ImpalaClient.Connect(host, port));
}
static void Main(string[] args)
{
var host = "somehost.example.com";
var port = 21000;
var sql = @"select count(*) cc, somekey from sometable group by somekey";
using (var impala = ImpalaClient.Connect(host, port))
{
{
var queryResult = impala.Query(sql);
queryResult.Result.ForEach(e =>
{
Console.WriteLine(@"{0}={1}", e["somekey"], e["cc"]);
});
Console.WriteLine(@"Elapsed: {0}", queryResult.ElapsedTime);
}
// Specify configuration each query.
var conf = new Dictionary <string, string>()
{
// e.g. "2g"
{ "mem_limit", "-1" },
};
{
var queryResult = impala.Query(sql, conf);
Console.WriteLine(@"Elapsed: {0}", queryResult.ElapsedTime);
}
// Specific result handling.
{
var queryResult = impala.Query(sql, conf, new MyHandler());
Console.WriteLine(@"Elapsed: {0}", queryResult.ElapsedTime);
}
}
}
