CreateQuery t_vertical_merge_memory (children 3)
 Identifier t_vertical_merge_memory
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration id (children 1)
    DataType UInt64
   ColumnDeclaration arr (children 1)
    DataType Array (children 1)
     ExpressionList (children 1)
      DataType String
 Storage definition (children 3)
  Function MergeTree
  Identifier id
  Set
