public static IDataReader RunOneSqlCommandReader(this DbConnection conn, ISqlDialect dialect, string sql, DbTransaction tran, int?timeout, IInvoker invoker)
{
if (sql.StartsWith("@getschema"))
{
string[] items = sql.Split(' ');
string entity = items[1].ToLower().Trim();
if (entity == "databases")
{
return(new DataTableReader(conn.GetSchema("Databases")));
}
if (entity == "tables")
{
return(new DataTableReader(conn.GetSchema("Tables")));
}
if (entity == "columns")
{
return(new DataTableReader(conn.GetSchema("Columns", new string[] { null, null, items[2].Trim() }).SelectNewTable("1=1", "ORDINAL_POSITION ASC")));
}
}
DbCommand c = conn.CreateCommand();
c.Connection = conn;
if (timeout != null)
{
c.CommandTimeout = timeout.Value;
}
c.CommandText = sql;
if (tran != null)
{
c.Transaction = tran;
}
Logging.Debug("Executing SQL:" + sql);
IDisposable canc = null;
if (invoker != null)
{
canc = invoker.AddOnCancel(c.Cancel);
}
try
{
return(new CommandDataReader(c.ExecuteReader(), c, canc));
}
catch (Exception err)
{
err.Data["sql"] = c.CommandText;
if (c.Connection != null)
{
c.Connection.FillInfo(err.Data);
}
if (dialect != null)
{
dialect.FillInfo(err.Data);
}
throw;
}
}