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Fix the logical replication from HEAD to lower versions.

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Commit 464824323e changed the logical replication protocol to allow the
streaming of in-progress transactions and used the new version of protocol
irrespective of the server version. Use the appropriate version of the
protocol based on the server version.

Reported-by: Ashutosh Sharma
Author: Dilip Kumar
Reviewed-by: Ashutosh Sharma and Amit Kapila
Discussion: https://postgr.es/m/CAE9k0P=9OpXcNrcU5Gsvd5MZ8GFpiN833vNHzX6Uc=8+h1ft1Q@mail.gmail.com
This commit is contained in:
Amit Kapila
2020-09-26 10:08:00 +05:30
parent dee663f784
commit 079d0cacf4
3 changed files with 10 additions and 6 deletions
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4
src/backend/replication/logical/worker.c
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@ -3087,7 +3087,9 @@ ApplyWorkerMain(Datum main_arg)
options.logical = true;
options.startpoint = origin_startpos;
options.slotname = myslotname;
options.proto.logical.proto_version = LOGICALREP_PROTO_VERSION_NUM;
options.proto.logical.proto_version =
walrcv_server_version(wrconn) >= 140000 ?
LOGICALREP_PROTO_STREAM_VERSION_NUM : LOGICALREP_PROTO_VERSION_NUM;
options.proto.logical.publication_names = MySubscription->publications;
options.proto.logical.binary = MySubscription->binary;
options.proto.logical.streaming = MySubscription->stream;