BC timestamps appear incorrect in postgres

[jasobrown-rs]

Summary

When selecting a timestamp or timestamptz column directly from PG, the output will look like: 0214-02-05 15:40:00+00 BC. When selecting the same data from a cached query, the output looks like this: -0213-02-05 15:40:00 +00:00. While the years appear to be an off-by-one error, they actually represent the same point in time, just expressed differently: 214-…. BC vs -213…. I believe this is an artifact of the way be must parse BC dates wrt the chrono crate, in readyset-data::TimestatmpTz::from_str().

Steps to reproduce

noria=> create table bc_testtz(t timestamptz);
CREATE TABLE
noria=> insert into bc_testtz values('214-02-05 15:40:00+00 BC');
INSERT 0 1
noria=> select * from bc_testtz;
             t             
---------------------------
 0214-02-05 15:40:00+00 BC
(1 row)

noria=> create cache from select * from bc_testtz;

noria=> select * from bc_testtz;
              t              
-----------------------------
 -0213-02-05 15:40:00 +00:00
(1 row)

Upstream DB type and version

Postgres, any version. This will probably apply to MySQL, as well, although I have not tried it out.