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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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8
src/include/replication/logicalproto.h
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@ -19,8 +19,9 @@
/*
* Protocol capabilities
*
* LOGICALREP_PROTO_VERSION_NUM is our native protocol and the greatest version
* we can support. LOGICALREP_PROTO_MIN_VERSION_NUM is the oldest version we
* LOGICALREP_PROTO_VERSION_NUM is our native protocol.
* LOGICALREP_PROTO_MAX_VERSION_NUM is the greatest version we can support.
* LOGICALREP_PROTO_MIN_VERSION_NUM is the oldest version we
* have backwards compatibility for. The client requests protocol version at
* connect time.
*
@ -28,8 +29,9 @@
* support for streaming large transactions.
*/
#define LOGICALREP_PROTO_MIN_VERSION_NUM 1
#define LOGICALREP_PROTO_VERSION_NUM 1
#define LOGICALREP_PROTO_STREAM_VERSION_NUM 2
#define LOGICALREP_PROTO_VERSION_NUM 2
#define LOGICALREP_PROTO_MAX_VERSION_NUM LOGICALREP_PROTO_STREAM_VERSION_NUM
/*
* This struct stores a tuple received via logical replication.