CreateQuery m (children 3)
 Identifier m
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration v (children 1)
    DataType Enum8 (children 1)
     ExpressionList (children 2)
      Function equals (children 1)
       ExpressionList (children 2)
        Literal \'a\'
        Literal UInt64_1
      Function equals (children 1)
       ExpressionList (children 2)
        Literal \'b\'
        Literal UInt64_2
 Storage definition (children 3)
  Function MergeTree (children 1)
   ExpressionList
  Function tuple (children 1)
   ExpressionList
  Identifier v
