public override bool Equals(object obj)
{
if (obj is SelectStatement statement)
{
return(Kind == statement.Kind &&
Class == statement.Class &&
OutputColumns.SequenceEqual(statement.OutputColumns) &&
(MainSource == statement.MainSource || MainSource.Equals(statement.MainSource)) &&
(FilterConditions == statement.FilterConditions || FilterConditions.Equals(statement.FilterConditions)) &&
OutputOrder.SequenceEqual(statement.OutputOrder));
}
else
{
return(false);
}
}
