CreateQuery perf (children 3)
 Identifier perf
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration site (children 1)
    DataType String
   ColumnDeclaration user_id (children 1)
    DataType UInt64
   ColumnDeclaration z (children 1)
    DataType Float64
 Storage definition (children 1)
  Function Log