SelectWithUnionQuery (children 2)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function estimateCompressionRatio (alias estimate) (children 2)
     ExpressionList (children 1)
      Identifier number
     ExpressionList (children 1)
      Literal \'DoubleDelta, T64, ZSTD\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier compression_estimate_example
 Identifier Null
