SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 7)
    Identifier name
    Identifier column
    Identifier type
    Identifier statistics
    Identifier estimates.cardinality
    Identifier estimates.min
    Identifier estimates.max
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.parts_columns
   Function and (children 1)
    ExpressionList (children 3)
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier database
       Function currentDatabase (children 1)
        ExpressionList
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier table
       Literal \'test_table\'
     Identifier active
   ExpressionList (children 2)
    OrderByElement (children 1)
     Identifier name
    OrderByElement (children 1)
     Identifier column
