SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function tupleElement (children 1)
     ExpressionList (children 2)
      Identifier c
      Literal \'statistics\'
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function file (children 1)
       ExpressionList (children 2)
        Identifier statistics_02735.parquet
        Identifier ParquetMetadata
    TablesInSelectQueryElement (children 1)
     ArrayJoin (children 1)
      ExpressionList (children 1)
       Function tupleElement (alias c) (children 1)
        ExpressionList (children 2)
         Function arrayElement (children 1)
          ExpressionList (children 2)
           Identifier row_groups
           Literal UInt64_1
         Literal \'columns\'
