On Mon, 21 Aug 2023 at 17:17, Ron <ronljohnsonjr@xxxxxxxxx> wrote:
On 8/21/23 14:32, Dave Cramer wrote:
[snip]
It has to do with the way the data is being transferred. When the driver switches to a named statement it also switches to binary mode which means data will be transferred in binary.
In text we get -1, in binary we get -1.0
That seems odd. Why does it do that?
If we look at float8out_internal (text output) https://github.com/postgres/postgres/blob/6fde2d9a005a5bc04aa059d3faeb865c8dd322ce/src/backend/utils/adt/float.c#L536 and the comment about extra float digits which states
If >0, use shortest-decimal format for output; this is both the default and
allows for compatibility with clients that explicitly set a value here to
get round-trip-accurate results. If 0 or less, then use the old, slow,
decimal rounding method.
-1 would be the shortest-decimal format.
whereas float8send sends the actual binary data on disk, hence -1.0
Dave
--
Born in Arizona, moved to Babylonia.
