Postgresql 12 has replaced the DirectFunctionCallXXXX series
of functions with ones that take the collation to use.
PG 12 provides "compatability macro's" that use an
InvalidCollation. This causes nameeq function to fail.

We pass in an explicit collation when running against PG12+

Branch
------
REL_2_2_STABLE

Details
-------
https://git.postgresql.org/gitweb?p=slony1-engine.git;a=commitdiff;h=bb4872b8d2350b3ca4cc13b8b5d8068717412555

Modified Files
--------------
src/backend/slony1_funcs.c | 100 +++++++++++++++++++++++++++------------------
1 file changed, 61 insertions(+), 39 deletions(-)