SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function estimateCompressionRatio (children 2)
     ExpressionList (children 2)
      Identifier some_column
      Identifier other_column
     ExpressionList (children 2)
      Literal \'lz4\'
      Literal UInt64_8192
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test_table_for_estimate_compression_ratio
