pt-online-schema-change.3.1.0.patch

--- /usr/bin/pt-online-schema-change	2019-11-19 07:40:58.000000000 +0000
+++ pt-online-schema-change	2020-03-01 22:54:38.968673926 +0000
@@ -9525,6 +9525,19 @@
          my $statements  = $nibble_iter->statements();
          my $boundary    = $nibble_iter->boundaries();
 
+
+         if ( $o->get('no-data') ) {
+            print "Not copying rows because --no-data was specified.\n";
+            if ($nibble_iter->{pause_file}) {
+              while(-f $nibble_iter->{pause_file}) {
+                 print "Sleeping $nibble_iter->{sleep} seconds because $nibble_iter->{pause_file} exists\n";
+                 sleep($nibble_iter->{sleep});
+              }
+            }
+            return;
+         }
+
+
          if ( $o->get('dry-run') ) {
             print "Not copying rows because this is a dry run.\n";
          }
@@ -12428,6 +12441,11 @@
 however; it will only give the server a chance to recover from the queueing.  If
 you notice queueing, it is best to decrease the chunk time.
 
+=item --no-data
+
+No row will be copied to the new table. This is really dangerous, please use it
+wisely.
+
 =item --preserve-triggers
 
 Preserves old triggers when specified.