pgsql: Fix row filters with multiple publications

Fix row filters with multiple publications

When publishing changes through a artition root, we should use the row
filter for the top-most ancestor. The relation may be added to multiple
publications, using different ancestors, and 52e4f0cd47 handled this
incorrectly. With c91f71b9dc we find the correct top-most ancestor, but
the code tried to fetch the row filter from all publications, including
those using a different ancestor etc. No row filter can be found for
such publications, which was treated as replicating all rows.

Similarly to c91f71b9dc, this seems to be a rare issue in practice. It
requires multiple publications including the same partitioned relation,
through different ancestors.

Fixed by only passing publications containing the top-most ancestor to
pgoutput_row_filter_init(), so that treating a missing row filter as
replicating all rows is correct.

Report and fix by me, test case by Hou zj. Reviews and improvements by
Amit Kapila.

Author: Tomas Vondra, Hou zj, Amit Kapila
Reviewed-by: Amit Kapila, Hou zj
Discussion: https://postgr.es/m/d26d24dd-2fab-3c48-0162-2b7f84a9c893%40enterprisedb.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/5a079662256e381fde699c4fbbed6c2504a6d30a

Modified Files
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src/backend/replication/pgoutput/pgoutput.c | 26 +++++++++++++---
src/test/subscription/t/028_row_filter.pl   | 47 ++++++++++++++++++++++++++++-
2 files changed, 67 insertions(+), 6 deletions(-)