cherrylzhao commented on issue #5912:
URL: https://github.com/apache/shardingsphere/issues/5912#issuecomment-639453401
associated code is `PostgreSQLAuthenticationEngine`.
```
public boolean auth(final ChannelHandlerContext context, final PacketPayload
payload, final BackendConnection backendConnection) {
.....
// TODO send a md5 authentication request message
context.write(new PostgreSQLAuthenticationOKPacket(true));
context.write(new PostgreSQLParameterStatusPacket("server_version",
"12.3"));
context.write(new PostgreSQLParameterStatusPacket("client_encoding",
"UTF8"));
context.write(new PostgreSQLParameterStatusPacket("server_encoding",
"UTF8"));
}
```
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