pgsql: Add isolation test for INSERT ON CONFLICT speculative insertion

Started by Andres Freundabout 7 years ago1 messagescomitters

andres@anarazel.de

about 7 years ago

Add isolation test for INSERT ON CONFLICT speculative insertion failure.

This path previously was not reliably covered. There was some
heuristic coverage via insert-conflict-toast.spec, but that test is
not deterministic, and only tested for a somewhat specific bug.

Backpatch, as this is a complicated and otherwise untested code
path. Unfortunately 9.5 cannot handle two waiting sessions, and thus
cannot execute this test.

Triggered by a conversion with Melanie Plageman.

Author: Andres Freund
Discussion: /messages/by-id/CAAKRu_a7hbyrk=wveHYhr4LbcRnRCG=yPUVoQYB9YO1CdUBE9Q@mail.gmail.com
Backpatch: 9.5-

Branch
------
REL_11_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/05cf41973157577aac9706dcc7998054949b0ed4

Modified Files
--------------
.../expected/insert-conflict-specconflict.out | 179 +++++++++++++++++++++
src/test/isolation/isolation_schedule | 1 +
.../specs/insert-conflict-specconflict.spec | 149 +++++++++++++++++
3 files changed, 329 insertions(+)