Fixed bug #31077.

mysqldump adds the "-- Dump completed on YYYY-MM-DD hh:mm:ss" string
to the end of output if the --comments switch is on.
The only way to suppress this line is to use --skip-comments/--compact
switch.

New switch has been added to the mysqldump client command line:
--dump-date.

For the compatibility with previous releases, by default the --dump-date
is on.
The --dump-date switch forces mysqldump to add date to the
"-- Dump completed on ..." string at the end of output.
The --skip-dump-date switch supresses the output of date string
and uses short form of that commentary: "-- Dump completed".
--skip-comments or --compact switches disable the whole commentary
as usual.

1 files changed, 13 insertions, 5 deletions

diff --git a/client/mysqldump.c b/client/mysqldump.c
index cc8458c7a8e..fb28647a120 100644
--- a/client/mysqldump.c
+++ b/client/mysqldump.c
@@ -89,7 +89,7 @@ static my_bool  verbose= 0, opt_no_create_info= 0, opt_no_data= 0,
                 opt_drop=1,opt_keywords=0,opt_lock=1,opt_compress=0,
                 opt_delayed=0,create_options=1,opt_quoted=0,opt_databases=0,
                 opt_alldbs=0,opt_create_db=0,opt_lock_all_tables=0,
-                opt_set_charset=0,
+                opt_set_charset=0, opt_dump_date=1,
                 opt_autocommit=0,opt_disable_keys=1,opt_xml=0,
                 opt_delete_master_logs=0, tty_password=0,
                 opt_single_transaction=0, opt_comments= 0, opt_compact= 0,
@@ -402,6 +402,9 @@ static struct my_option my_long_options[] =
    "automatically turns off --lock-tables.",
    (gptr*) &opt_single_transaction, (gptr*) &opt_single_transaction, 0,
    GET_BOOL, NO_ARG,  0, 0, 0, 0, 0, 0},
+  {"dump-date", OPT_DUMP_DATE, "Put a dump date to the end of the output.",
+   (gptr*) &opt_dump_date, (gptr*) &opt_dump_date, 0,
+   GET_BOOL, NO_ARG, 1, 0, 0, 0, 0, 0},
   {"skip-opt", OPT_SKIP_OPTIMIZATION,
    "Disable --opt. Disables --add-drop-table, --add-locks, --create-options, --quick, --extended-insert, --lock-tables, --set-charset, and --disable-keys.",
    0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
@@ -623,10 +626,15 @@ static void write_footer(FILE *sql_file)
     fputs("\n", sql_file);
     if (opt_comments)
     {
-      char time_str[20];
-      get_date(time_str, GETDATE_DATE_TIME, 0);
-      fprintf(sql_file, "-- Dump completed on %s\n",
-              time_str);
+      if (opt_dump_date)
+      {
+        char time_str[20];
+        get_date(time_str, GETDATE_DATE_TIME, 0);
+        fprintf(sql_file, "-- Dump completed on %s\n",
+                time_str);
+      }
+      else
+        fprintf(sql_file, "-- Dump completed");
     }
     check_io(sql_file);
   }