SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Literal UInt64_1
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test_index
   Function less (children 1)
    ExpressionList (children 2)
     Identifier date
     Function toDateTime (children 1)
      ExpressionList (children 1)
       Literal \'2020-10-30 06:00:00\'
