CreateQuery t (children 3)
 Identifier t
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration x (children 1)
    DataType Decimal (children 1)
     ExpressionList (children 2)
      Literal UInt64_18
      Literal UInt64_3
 Storage definition (children 2)
  Function MergeTree
  Identifier x