Console will send query YIELD 1 when type query once.

[Shylock-Hg]

No description provided.

[jievince]

Sorry, I don't get it. Could you paste the screenshot here?

[Shylock-Hg]

e.g.

E1222 15:08:19.979668 82943 GraphService.cpp:161] Execute query: YIELD 1
E1222 15:08:25.319705 82943 GraphService.cpp:161] Execute query: return 'abc'

I just execute return 'abc', but console send YIELD 1 too.

[jievince]

e.g.

E1222 15:08:19.979668 82943 GraphService.cpp:161] Execute query: YIELD 1
E1222 15:08:25.319705 82943 GraphService.cpp:161] Execute query: return 'abc'

I just execute return 'abc', but console send YIELD 1 too.

When get a new connection, nebula-go will call ping(), which will execute YIELD 1.
See https://github.com/vesoft-inc/nebula-go/blob/40030d441885c03c34054391e841e8f59443e0af/connection_pool.go#L149.
nebula-cpp also did so:
https://github.com/vesoft-inc/nebula-cpp/blob/e34071fe7bfb68e2012c94fcd03be4707216c45a/src/client/ConnectionPool.cpp#L63

bool Connection::isOpen() { return ping(); }


void Connection::close() {
  if (client_ != nullptr) {
    clientLoopThread_->getEventBase()->runImmediatelyOrRunInEventBaseThreadAndWait(
        [this]() { delete client_; });
    client_ = nullptr;
  }
}


bool Connection::ping() {
  auto resp = execute(0 /*Only check connection*/, "YIELD 1");
  if (resp.errorCode == ErrorCode::E_RPC_FAILURE || resp.errorCode == ErrorCode::E_DISCONNECTED) {

[Shylock-Hg]

I know ping, But nebula-console will send ping when user send query not just when connecting.

[jievince]

But console just uses the nebula-go's interface session.execute, it doesn't use ping.

[jievince]

Which version of server do you use? I couldn't find this line GraphService.cpp:161] Execute query: in the code.

[Shylock-Hg]

Which version of server do you use? I couldn't find this line GraphService.cpp:161] Execute query: in the code.

That's code I added to print the query, you could add too.