pgsql: Check that a promoted standby keeps its 8-byte OID counter

Check that a promoted standby keeps its 8-byte OID counter

The counter reaches a standby through XLOG_NEXTOID and checkpoint
records. This commit adds a test to move the next OID past the 2^32
limit on a primary and read it back from the promoted standby. This
reuses the same trick as some of the previous tests, with a pg_resetwal
command setting the next OID to be larger than 2^32, combined with a
check based on pg_control_checkpoint().

This closes a testing gap of cb298616463d regarding the replay of
XLOG_NEXTOID, where this WAL record has been updated to pass down an
Oid8 value. By default, regression tests would use OIDs way below the
UINT32_MAX limit.

Author: Rui Zhao <zhaorui126(at)gmail(dot)com>
Discussion: https://postgr.es/m/CAHWVJhGkb1n_QSS4M=PKJD5HHcwK3KXpFwVxoRVLzAG3j+2fhQ@mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/1cd8669179f41b939c08e84ddddd3bdce0e095ea

Modified Files
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src/test/recovery/t/004_timeline_switch.pl | 17 +++++++++++++++++
1 file changed, 17 insertions(+)