CreateQuery test (children 3)
 Identifier test
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration x (children 1)
    DataType Enum (children 1)
     ExpressionList (children 2)
      Function equals (children 1)
       ExpressionList (children 2)
        Literal \'hello\'
        Literal UInt64_1
      Function equals (children 1)
       ExpressionList (children 2)
        Literal \'world\'
        Literal UInt64_2
   ColumnDeclaration y (children 1)
    DataType String
 Storage definition (children 3)
  Function MergeTree
  Identifier x
  Identifier y
