CreateQuery TestTbl (children 3)
 Identifier TestTbl
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration id (children 1)
    DataType UInt16
   ColumnDeclaration dt (children 1)
    DataType Date
   ColumnDeclaration val (children 1)
    DataType String
 Storage definition (children 3)
  Function MergeTree
  Identifier dt
  Identifier id
