CreateQuery t1 (children 3)
 Identifier t1
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration id (children 1)
    DataType UInt32
   ColumnDeclaration key (children 1)
    DataType Int32
   ColumnDeclaration payload (children 1)
    DataType String
 Storage definition (children 2)
  Function MergeTree
  Identifier id
