CreateQuery t_sparse_distinct (children 3)
 Identifier t_sparse_distinct
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration id (children 1)
    DataType UInt32
   ColumnDeclaration v (children 1)
    DataType UInt64
 Storage definition (children 3)
  Function MergeTree
  Identifier id
  Set