CreateQuery fl_interval (children 3)
 Identifier fl_interval
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration id (children 1)
    DataType String
   ColumnDeclaration start (children 1)
    DataType Float
   ColumnDeclaration end (children 1)
    DataType Float
 Storage definition (children 2)
  Function MergeTree
  Identifier start
