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spock.max_proto_version()

NAME

spock.spock_max_proto_version()

SYNOPSIS

spock.spock_max_proto_version()

RETURNS

The maximum spock protocol version supported by the installed Spock extension as an integer. The protocol version determines compatibility between Spock versions.

DESCRIPTION

Returns the maximum protocol version supported by the Spock extension.

This function queries the Spock extension and returns the highest protocol version number it can use for replication communication. The protocol version determines the features and capabilities available for replication between nodes.

When establishing replication connections between nodes running different Spock versions, the nodes negotiate to use the lower of the two maximum protocol versions. This ensures compatibility between nodes running different Spock releases.

The protocol version is returned as an integer value. Higher numbers indicate newer protocol versions with additional features.

This is a read-only query function that does not modify data.

ARGUMENTS

This function takes no arguments.

EXAMPLE

The following command shows that the current version of Spock uses protocol version 4:

postgres=# SELECT spock.spock_max_proto_version();
 spock_max_proto_version
-------------------------
                       4
(1 row)