CreateQuery test (children 3)
 Identifier test
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration dt (children 1)
    DataType Date
   ColumnDeclaration id (children 1)
    DataType UInt32
   ColumnDeclaration val (children 1)
    DataType Nullable (children 1)
     ExpressionList (children 1)
      DataType UInt32
 Storage definition (children 1)
  Function MergeTree (children 1)
   ExpressionList (children 3)
    Identifier dt
    Identifier id
    Literal UInt64_8192