OdbcCommad cmd;
....
cmd.CommandText=@"create temp table tmpTable (
id integer,
value varchar(32)) with no log";
cmd.ExecuteReader();

cmd.CommandText=@"insert into tmpTable values (0, 'some text')";
cmd.ExecuteReader();

		private void button1_Click(object sender, System.EventArgs e)
		{   OdbcConnection odbcConnection1;
			OdbcCommand odbcCommand1;

			odbcConnection1 = new OdbcConnection();
			odbcCommand1 = new OdbcCommand();

			odbcConnection1.ConnectionString = "DRIVER={IBM INFORMIX 3.82 32 BIT};UID=informix;PWD=informix;DATABASE=salary;HOST=localhost;SERVER=ol_k1;SERVICE=1526;PROTOCOL=onsoctcp;CLIENT_LOCALE=ru_RU.1251;DB_LOCALE=ru_RU.1251;VMBCHARLENEXACT=0;CONNECTDATABASE=YES;EXCLUSIVE=0;CURSORBEHAVIOR=0;ENABLESCROLLABLECURSORS=0;ENABLEINSERTCURSORS=0;OPTIMIZEAUTOCOMMIT=1;OPTOFC=0;REPORTKEYSETCURSORS=0;NEEDODBCTYPESONLY=0;FETCHBUFFERSIZE=4096;DESCRIBEDECIMALFLOATPOINT=0;DONOTUSELVARCHAR=0;REPORTCHARCOLASWIDECHARCOL=0;";
			odbcConnection1.Open();
			odbcCommand1.Connection = odbcConnection1;
			odbcCommand1.CommandText=@"create temp table tmpTable (id integer,value varchar(32)) with no log";
			odbcCommand1.ExecuteNonQuery();

			odbcCommand1.CommandText=@"insert into tmpTable values (0, 'some text')";
			odbcCommand1.ExecuteNonQuery();
		}