private IOperation ComposeInputOperation(Process process, AbstractConnection connection)
{
if (connection.Schemas && _entity.Schema.Equals(string.Empty))
{
_entity.Schema = connection.DefaultSchema;
}
if (_entity.HasSqlKeysOverride())
{
return(new SqlKeysOverrideOperation(_entity, connection));
}
if (!_entity.PrimaryKey.WithInput().Any())
{
return(new EmptyOperation());
}
if (process.IsFirstRun || !_entity.CanDetectChanges(connection.IsDatabase))
{
return(connection.ExtractAllKeysFromInput(_process, _entity));
}
var operation = new EntityInputKeysExtractDelta(process, _entity, connection);
if (operation.NeedsToRun())
{
return(operation);
}
return(new EmptyOperation());
}