CreateQuery mt (children 3)
 Identifier mt
 Columns definition (children 2)
  ExpressionList (children 2)
   ColumnDeclaration x (children 1)
    DataType String
   ColumnDeclaration y (children 1)
    DataType UInt64
  ExpressionList (children 1)
   Index (children 2)
    Identifier y
    Function minmax (children 1)
     ExpressionList
 Storage definition (children 2)
  Function MergeTree
  Identifier y