SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Identifier serialization_kind
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.parts_columns
   Function and (children 1)
    ExpressionList (children 4)
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier table
       Literal \'t_sparse_s3\'
     Identifier active
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier column
       Literal \'s\'
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier database
       Function currentDatabase (children 1)
        ExpressionList