WAL log unchanged toasted replica identity key attributes.
Currently, during UPDATE, the unchanged replica identity key attributes
are not logged separately because they are getting logged as part of the
new tuple. But if they are stored externally then the untoasted values are
not getting logged as part of the new tuple and logical replication won't
be able to replicate such UPDATEs. So we need to log such attributes as
part of the old_key_tuple during UPDATE.
Reported-by: Haiying Tang
Author: Dilip Kumar and Amit Kapila
Reviewed-by: Alvaro Herrera, Haiying Tang, Andres Freund
Backpatch-through: 10
Discussion: https://postgr.es/m/OS0PR01MB611342D0A92D4F4BF26C0F47FB229@OS0PR01MB6113.jpnprd01.prod.outlook.com
Branch
------
REL_14_STABLE
Details
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https://git.postgresql.org/pg/commitdiff/04645bbcae72c71e5bf28a7a0c96efa851e13ddb
Modified Files
--------------
contrib/test_decoding/expected/toast.out | 2 +-
doc/src/sgml/ref/alter_table.sgml | 9 +-
src/backend/access/heap/heapam.c | 181 ++++++++++++++++++++-----------
3 files changed, 123 insertions(+), 69 deletions(-)