1 files changed, 8 insertions, 5 deletions
diff --git a/client/mysql.cc b/client/mysql.cc
index 2baac7b92b8..cd2c37972bc 100644
--- a/client/mysql.cc
+++ b/client/mysql.cc
@@ -1698,11 +1698,14 @@ static struct my_option my_long_options[] =
     &opt_default_auth, &opt_default_auth, 0,
    GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
   {"binary-mode", 0,
-   "By default, ASCII '\\0' is disallowed and '\\r\\n' is translated to '\\n'. "
-   "This switch turns off both features, and also turns off parsing of all client"
-   "commands except \\C and DELIMITER, in non-interactive mode (for input "
-   "piped to mysql or loaded using the 'source' command). This is necessary "
-   "when processing output from mysqlbinlog that may contain blobs.",
+   "Binary mode allows certain character sequences to be processed as data "
+   "that would otherwise be treated with a special meaning by the parser. "
+   "Specifically, this switch turns off parsing of all client commands except "
+   "\\C and DELIMITER in non-interactive mode (i.e., when binary mode is "
+   "combined with either 1) piped input, 2) the --batch mysql option, or 3) "
+   "the 'source' command). Also, in binary mode, occurrences of '\\r\\n' and "
+   "ASCII '\\0' are preserved within strings, whereas by default, '\\r\\n' is "
+   "translated to '\\n' and '\\0' is disallowed in user input.",
    &opt_binary_mode, &opt_binary_mode, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
   { 0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}
 };