rule

case class JoinData(source: Option[Node] = None, conditions: Option[Expression] = None, filter: Option[Expression] = None, project: Seq[NamedExpression] = Nil, attributes: Seq[AttributeReference] = Nil, servers: Seq[GitbaseServer] = Nil, valid: Boolean = false) extends Product with Serializable

object AddSource extends Rule[LogicalPlan]

Rule to assign to an org.apache.spark.sql.catalyst.expressions.AttributeReference metadata to identify the table it belongs to.
object PushdownAggregations extends Rule[LogicalPlan]
object PushdownJoins extends Rule[LogicalPlan]
object PushdownTree extends Rule[LogicalPlan]
def getAll: Seq[Rule[LogicalPlan]]