--- client/mysql.cc.orig	2020-03-26 22:31:45.000000000 +0900
+++ client/mysql.cc	2020-04-28 18:46:43.019001482 +0900
@@ -5107,2 +5107,24 @@
         }
+        case 'H': {
+          if (!connected) {
+            processed_prompt.append("not_connected");
+            break;
+          }
+
+          const char *hostname;
+          const char *query = "SELECT @@hostname";
+          MYSQL_RES *result;
+          if (!(mysql_real_query_for_lazy(query, strlen(query))) &&
+              !(mysql_store_result_for_lazy(&result)))
+          {
+            MYSQL_ROW row = mysql_fetch_row(result);
+            hostname= my_strdup(PSI_NOT_INSTRUMENTED, row[0], MYF(MY_WME));
+            mysql_free_result(result);
+          }
+          else
+            hostname= "not_connected";
+
+          processed_prompt.append(hostname);
+          break;
+        }
         case 'p': {