MDEV-9077 - do not dump sys schema by default (MySQL bug#76735)

client/client_priv.h

@@ -126,3 +126,13 @@ enum options_client
   Name of the performance schema database.
 */
 #define PERFORMANCE_SCHEMA_DB_NAME "performance_schema"
+
+/**
+  First mariadb version supporting the sys schema.
+*/
+#define FIRST_SYS_SCHEMA_VERSION 100600
+
+/**
+  Name of the sys schema database.
+*/
+#define SYS_SCHEMA_DB_NAME "sys"

client/mysqldump.c

@@ -5228,6 +5228,10 @@ static int dump_all_databases()
         !my_strcasecmp(&my_charset_latin1, row[0], PERFORMANCE_SCHEMA_DB_NAME))
       continue;
 
+   if (mysql_get_server_version(mysql) >= FIRST_SYS_SCHEMA_VERSION &&
+       !my_strcasecmp(&my_charset_latin1, row[0], SYS_SCHEMA_DB_NAME))
+     continue;
+
     if (include_database(row[0]))
       if (dump_all_tables_in_db(row[0]))
         result=1;
@@ -5252,6 +5256,10 @@ static int dump_all_databases()
           !my_strcasecmp(&my_charset_latin1, row[0], PERFORMANCE_SCHEMA_DB_NAME))
         continue;
 
+     if (mysql_get_server_version(mysql) >= FIRST_SYS_SCHEMA_VERSION &&
+        !my_strcasecmp(&my_charset_latin1, row[0], SYS_SCHEMA_DB_NAME))
+        continue;
+
       if (include_database(row[0]))
         if (dump_all_views_in_db(row[0]))
           result=1;