First try with role reset (#427)

* First try with role rest

* update

* extra line

* Update src/server.rs

Co-authored-by: Lev Kokotov <levkk@users.noreply.github.com>

* Update tests/ruby/misc_spec.rb

Co-authored-by: Lev Kokotov <levkk@users.noreply.github.com>

---------

Co-authored-by: Lev Kokotov <levkk@users.noreply.github.com>

Author: atanner27

src/server.rs

@@ -963,6 +963,7 @@ impl Server {
         if self.needs_cleanup {
             warn!("Server returned with session state altered, discarding state");
             self.query("DISCARD ALL").await?;
+            self.query("RESET ROLE").await?;
             self.needs_cleanup = false;
         }
 

tests/ruby/misc_spec.rb

@@ -241,6 +241,18 @@
 
         expect(processes.primary.count_query("DISCARD ALL")).to eq(10)
       end
+
+      it "Resets server roles correctly" do
+        10.times do
+          conn = PG::connect(processes.pgcat.connection_string("sharded_db", "sharding_user"))
+          conn.async_exec("SET SERVER ROLE to 'primary'")
+          conn.async_exec("SELECT 1")
+          conn.async_exec("SET statement_timeout to 5000")
+          conn.close
+        end
+
+        expect(processes.primary.count_query("RESET ROLE")).to eq(10)
+      end 
     end
 
     context "transaction mode" do