CreateQuery t1 (children 3)
 Identifier t1
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration id (children 1)
    DataType Int64
   ColumnDeclaration create_time (children 1)
    DataType DateTime
 Storage definition (children 3)
  Function MergeTree
  Identifier id
  Set
