public int DropTable()
{
LinterDbCommand command = connection.CreateCommand();
command.CommandText = String.Format(
"DROP TABLE {0} ", name);
return(command.ExecuteNonQuery());
}
public void Delete(long from, long to)
{
LinterDbCommand command = connection.CreateCommand();
command.CommandText = String.Format(
"DELETE FROM {0} " +
"WHERE ID >= {1} AND ID <= {2}", name, from, to);
command.ExecuteNonQuery();
}
public void Delete(long key)
{
LinterDbCommand command = connection.CreateCommand();
command.CommandText = String.Format(
"DELETE FROM {0} " +
"WHERE ID = {1}", name, key);
command.ExecuteNonQuery();
}
public void Write(IEnumerable <KeyValuePair <long, Tick> > records)
{
lock (SyncRoot)
{
foreach (KeyValuePair <long, Tick> kv in records)
{
long key = kv.Key;
Tick tick = kv.Value;
writeCommand.Parameters[0].Value = key;
writeCommand.Parameters[1].Value = tick.Symbol;
writeCommand.Parameters[2].Value = tick.Timestamp;
writeCommand.Parameters[3].Value = tick.Bid;
writeCommand.Parameters[4].Value = tick.Ask;
writeCommand.Parameters[5].Value = tick.BidSize;
writeCommand.Parameters[6].Value = tick.AskSize;
writeCommand.Parameters[7].Value = tick.Provider;
writeCommand.ExecuteNonQuery();
}
}
}
public int CreateTable()
{
LinterDbCommand command = connection.CreateCommand();
command.CommandText = String.Format(
"CREATE OR REPLACE TABLE {0} (", name) +
"ID bigint primary key," +
"Symbol varchar(255)," +
"Time date," +
"Bid double," +
"Ask double," +
"BidSize int," +
"AskSize int," +
"Provider varchar(255))";
return(command.ExecuteNonQuery());
}
