CreateQuery test_6 (children 3)
 Identifier test_6
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration a (children 1)
    DataType DateTime64 (children 1)
     ExpressionList (children 1)
      Literal UInt64_6
 Storage definition (children 2)
  Function MergeTree
  Identifier a
