CreateQuery test_00615 (children 3)
 Identifier test_00615
 Columns definition (children 1)
  ExpressionList (children 4)
   ColumnDeclaration dt (children 1)
    DataType Date
   ColumnDeclaration id (children 1)
    DataType Int32
   ColumnDeclaration key (children 1)
    DataType String
   ColumnDeclaration data (children 1)
    DataType Nullable (children 1)
     ExpressionList (children 1)
      DataType Int8
 Storage definition (children 1)
  Function MergeTree (children 1)
   ExpressionList (children 3)
    Identifier dt
    Function tuple (children 1)
     ExpressionList (children 3)
      Identifier id
      Identifier key
      Identifier dt
    Literal UInt64_8192