SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Subquery (alias size_level_1) (children 1)
     SelectWithUnionQuery (children 1)
      ExpressionList (children 1)
       SelectQuery (children 2)
        ExpressionList (children 1)
         Identifier total_compressed_size
        TablesInSelectQuery (children 1)
         TablesInSelectQueryElement (children 1)
          TableExpression (children 1)
           Function file (children 1)
            ExpressionList (children 2)
             Identifier 03276_parquet_custom_encoder_compression_level_1.parquet
             Identifier ParquetMetadata
    Subquery (alias size_level_22) (children 1)
     SelectWithUnionQuery (children 1)
      ExpressionList (children 1)
       SelectQuery (children 2)
        ExpressionList (children 1)
         Identifier total_compressed_size
        TablesInSelectQuery (children 1)
         TablesInSelectQueryElement (children 1)
          TableExpression (children 1)
           Function file (children 1)
            ExpressionList (children 2)
             Identifier 03276_parquet_custom_encoder_compression_level_22.parquet
             Identifier ParquetMetadata
   ExpressionList (children 1)
    Function less (alias compression_higher_level_produces_smaller_file) (children 1)
     ExpressionList (children 2)
      Identifier size_level_22
      Identifier size_level_1
