diff --git a/bin/pt-online-schema-change b/bin/pt-online-schema-change
index 6ffa5762..c883c75e 100755
--- a/bin/pt-online-schema-change
+++ b/bin/pt-online-schema-change
@@ -8693,6 +8693,13 @@ sub main {
          }
       }
 
+      if ( $o->get('where') && !$o->get('force')
+           && ( $o->get('drop-new-table') || $o->get('swap-tables') ) )
+        {
+         _die("Using option --where together with --drop-new-table and --swap-tables may lead to data loss, therefore this operation is only allowed if option --force also specified. Aborting.", UNSUPPORTED_OPERATION);
+      }
+
+
       # See the "pod-based-option-value-validation" spec for how this may
       # be automagically validated.
       if ( $alter_fk_method
@@ -9254,6 +9261,7 @@ sub main {
          Cxn    => $cxn,
          Quoter => $q,
          only_same_schema_fks => $o->get('only-same-schema-fks'),
+         where  => $o->get('where'),
       );
       if ( !$child_tables ) {
          if ( $alter_fk_method ) {
@@ -9281,6 +9289,12 @@ sub main {
                $child_table->{row_est} || '?';
          }
 
+         if ( $o->get('where') && !$o->get('force') ) {
+            print "Child tables found and option --where specified. Rebuilding foreign key constraints may lead to errors.\n";
+            print "Use --force to override this check\n";
+            return 1;
+         }
+
          # TODO: Fix self referencing foreign keys handling.
          # See: https://jira.percona.com/browse/PT-1802
          #      https://jira.percona.com/browse/PT-1853
@@ -9900,6 +9914,7 @@ sub main {
                my ($n_rows) = NibbleIterator::get_row_estimate(
                   Cxn   => $slave,
                   tbl   => $tbl,
+                  where => $o->get('where'),
                );
                PTDEBUG && _d('Table on',$slave->name(),'has', $n_rows, 'rows');
                if ( $limit && $n_rows && $n_rows > ($tbl->{chunk_size} * $limit) ) {
@@ -10230,6 +10245,7 @@ sub main {
          max_rows     => $max_rows,
          Cxn          => $cxn,
          OptionParser => $o,
+         where        => $o->get('where'),
       );
 
       if ( $alter_fk_method eq 'drop_swap' ) {
@@ -11183,6 +11199,7 @@ sub find_child_tables {
       my ($n_rows) = NibbleIterator::get_row_estimate(
          Cxn => $cxn,
          tbl => $tbl,
+         where => $args{where},
       );
       $tbl->{row_est} = $n_rows;
 
@@ -11218,6 +11235,7 @@ sub determine_alter_fk_method {
       my ($n_rows) = NibbleIterator::get_row_estimate(
          Cxn   => $cxn,
          tbl   => $child_tbl,
+         where => $args{where},
       );
       if ( $n_rows > $max_rows ) {
          print "too many rows: $n_rows; must use drop_swap\n";
@@ -12738,7 +12756,9 @@ duplicate rows and this data will be lost.
 
 =item --force
 
-This options bypasses confirmation in case of using alter-foreign-keys-method = none , which might break foreign key constraints.
+This option bypasses confirmation in case of using alter-foreign-keys-method = none, which might break foreign key constraints.
+
+This option also allows to use option --where without options --no-drop-new-table and --no-swap-tables.
 
 =item --help
 
@@ -13193,6 +13213,23 @@ tool.
 
 For more information, visit L<https://www.percona.com/doc/percona-toolkit/LATEST/version-check.html>.
 
+=item --where
+
+type: string
+
+Copy only rows matching this WHERE clause.  You can use this option to limit
+the copying to only part of the table.  This is particularly useful if you want
+to restart pt-online-schema-change job after it was failed.
+
+This option is much like the -w option to mysqldump.  Do not specify the WHERE
+keyword.  You might need to quote the value.  Here is an example:
+
+  pt-online-schema-change --where "id > 12345678"
+
+IMPORTANT. If used without options --no-drop-new-table and --no-swap-tables
+may lead to data loss, therefore this operation only allowed if option --force
+also specified.
+
 =item --[no]fail-on-stopped-replication
 
 default: yes
diff --git a/t/pt-online-schema-change/pt-1751.t b/t/pt-online-schema-change/pt-1751.t
new file mode 100644
index 00000000..4d9cb92b
--- /dev/null
+++ b/t/pt-online-schema-change/pt-1751.t
@@ -0,0 +1,446 @@
+#!/usr/bin/env perl
+
+BEGIN {
+   die "The PERCONA_TOOLKIT_BRANCH environment variable is not set.\n"
+      unless $ENV{PERCONA_TOOLKIT_BRANCH} && -d $ENV{PERCONA_TOOLKIT_BRANCH};
+   unshift @INC, "$ENV{PERCONA_TOOLKIT_BRANCH}/lib";
+};
+
+use strict;
+use warnings FATAL => 'all';
+use English qw(-no_match_vars);
+use Test::More;
+
+use PerconaTest;
+use Sandbox;
+require "$trunk/bin/pt-online-schema-change";
+require VersionParser;
+
+use Data::Dumper;
+
+my $dp         = new DSNParser(opts=>$dsn_opts);
+my $sb         = new Sandbox(basedir => '/tmp', DSNParser => $dp);
+my $master_dbh = $sb->get_dbh_for('master');
+my $slave_dbh  = $sb->get_dbh_for('slave1');
+
+if ( !$master_dbh ) {
+   plan skip_all => 'Cannot connect to sandbox master';
+}
+elsif ( !$slave_dbh ) {
+   plan skip_all => 'Cannot connect to sandbox slave';
+}
+
+my @args   = qw(--set-vars innodb_lock_wait_timeout=3);
+my $output = "";
+my $dsn    = "h=127.1,P=12345,u=msandbox,p=msandbox";
+my $exit   = 0;
+my $sample = "t/pt-online-schema-change/samples";
+
+$sb->load_file('master', "$sample/basic_no_fks_innodb.sql");
+
+# #############################################################################
+# --where does not run without --no-drop-new-table and --no-swap-tables
+# unless option --force also specified
+# #############################################################################
+
+($output, $exit) = full_output(
+   sub { pt_online_schema_change::main(@args, "$dsn,D=pt_osc,t=t",
+      '--alter', 'drop column id', '--where', 'id > 10', '--execute') }
+);
+
+like(
+   $output,
+   qr/Using option --where together with --drop-new-table and --swap-tables may lead to data loss, therefore this operation is only allowed if option --force also specified. Aborting./i,
+   'Did not run with --where and without --no-drop-new-table, --no-swap-tables and --force'
+) or diag($output);
+
+is(
+   $exit,
+   17,
+   'Exit code 17 (UNSUPPORTED_OPERATION) with --where and without --no-drop-new-table, --no-swap-tables and --force'
+);
+
+($output, $exit) = full_output(
+   sub { pt_online_schema_change::main(@args, "$dsn,D=pt_osc,t=t",
+      '--alter', 'drop column id', '--where', 'id > 10', '--execute',
+      '--no-drop-new-table') }
+);
+
+like(
+   $output,
+   qr/Using option --where together with --drop-new-table and --swap-tables may lead to data loss, therefore this operation is only allowed if option --force also specified. Aborting./i,
+   'Did not run with --where and without --no-swap-tables and --force'
+) or diag($output);
+
+is(
+   $exit,
+   17,
+   'Exit code 17 (UNSUPPORTED_OPERATION) with --where and without --no-swap-tables and --force'
+);
+
+($output, $exit) = full_output(
+   sub { pt_online_schema_change::main(@args, "$dsn,D=pt_osc,t=t",
+      '--alter', 'drop column id', '--where', 'id > 10', '--execute',
+      '--no-swap-tables') }
+);
+
+like(
+   $output,
+   qr/Using option --where together with --drop-new-table and --swap-tables may lead to data loss, therefore this operation is only allowed if option --force also specified. Aborting./i,
+   'Did not run with --where and without --no-drop-new-table and --force'
+) or diag($output);
+
+is(
+   $exit,
+   17,
+   'Exit code 17 (UNSUPPORTED_OPERATION) with --where and without --no-drop-new-table and --force'
+);
+
+# #############################################################################
+# Multiple situations when option --where works
+# #############################################################################
+
+$output = output(
+   sub { pt_online_schema_change::main(@args, "$dsn,D=pt_osc,t=t",
+      '--alter', 'add column e int', '--where', 'id > 10', '--execute',
+      '--no-swap-tables', '--no-drop-new-table', 
+      '--new-table-name', 't_pt_1751') }
+);
+
+like(
+   $output,
+   qr/Successfully altered/i,
+   'Option --where runs with --no-drop-new-table and --no-swap-tables'
+) or diag($output);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.t_pt_1751"`;
+is(
+   $output + 0,
+   10,
+   'Only 10 rows copied'
+);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.t_pt_1751 where id <= 10"`;
+is(
+   $output + 0,
+   0,
+   'Rows, satisfying --where condition are not copied'
+) or diag($output);
+
+$sb->load_file('master', "$sample/basic_no_fks_innodb.sql");
+
+$output = output(
+   sub { pt_online_schema_change::main(@args, "$dsn,D=pt_osc,t=t",
+      '--alter', 'add column e int', '--where', 'id > 10', '--execute',
+      '--force') }
+);
+
+like(
+   $output,
+   qr/Successfully altered/i,
+   'Option --where runs with --force'
+) or diag($output);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.t"`;
+is(
+   $output + 0,
+   10,
+   'Only 10 rows copied'
+);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.t where id <= 10"`;
+is(
+   $output + 0,
+   0,
+   'Rows, satisfying --where condition are not copied'
+) or diag($output);
+
+# Same test with chunk size = 1
+
+$sb->load_file('master', "$sample/basic_no_fks_innodb.sql");
+
+$output = output(
+   sub { pt_online_schema_change::main(@args, "$dsn,D=pt_osc,t=t",
+      '--alter', 'add column e int', '--where', 'id > 10', '--execute',
+      '--no-swap-tables', '--no-drop-new-table', '--chunk-size', '1',
+      '--new-table-name', 't_pt_1751') }
+);
+
+like(
+   $output,
+   qr/Successfully altered/i,
+   'Option --where runs with --no-drop-new-table and --no-swap-tables'
+) or diag($output);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.t_pt_1751"`;
+is(
+   $output + 0,
+   10,
+   'Only 10 rows copied'
+);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.t_pt_1751 where id <= 10"`;
+is(
+   $output + 0,
+   0,
+   'Rows, satisfying --where condition are not copied'
+) or diag($output);
+
+$sb->load_file('master', "$sample/basic_no_fks_innodb.sql");
+
+$output = output(
+   sub { pt_online_schema_change::main(@args, "$dsn,D=pt_osc,t=t",
+      '--alter', 'add column e int', '--where', 'id > 10', '--execute',
+      '--force', '--chunk-size', '1',) }
+);
+
+like(
+   $output,
+   qr/Successfully altered/i,
+   'Option --where runs with --force'
+) or diag($output);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.t"`;
+is(
+   $output + 0,
+   10,
+   'Only 10 rows copied'
+);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.t where id <= 10"`;
+is(
+   $output + 0,
+   0,
+   'Rows, satisfying --where condition are not copied'
+) or diag($output);
+
+
+# #############################################################################
+# Option --where and foreign keys
+# #############################################################################
+
+$sb->load_file('master', "$sample/basic_with_fks.sql");
+
+$output = output(
+   sub { pt_online_schema_change::main(@args, "$dsn,D=pt_osc,t=city",
+      '--alter', 'drop column last_update', '--where', 'city_id >= 3', '--execute',
+      '--alter-foreign-keys-method', 'rebuild_constraints', '--force') }
+);
+
+like(
+   $output,
+   qr/Successfully altered/i,
+   'Option --where runs with --force and --alter-foreign-keys-method=rebuild_constraints'
+) or diag($output);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.city"`;
+is(
+   $output + 0,
+   3,
+   'Only 3 rows copied'
+);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.city where city_id < 3"`;
+is(
+   $output + 0,
+   0,
+   'Rows, satisfying --where condition are not copied'
+) or diag($output);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.country"`;
+is(
+   $output + 0,
+   5,
+   'Table country not corrupted'
+) or diag($output);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.address"`;
+is(
+   $output + 0,
+   5,
+   'Table address not modified'
+) or diag($output);
+
+$sb->load_file('master', "$sample/basic_with_fks.sql");
+
+$output = output(
+   sub { pt_online_schema_change::main(@args, "$dsn,D=pt_osc,t=city",
+      '--alter', 'drop column last_update', '--where', 'city_id >= 3', '--execute',
+      '--alter-foreign-keys-method', 'auto', '--force') }
+);
+
+like(
+   $output,
+   qr/Successfully altered/i,
+   'Option --where runs with --force and --alter-foreign-keys-method=auto'
+) or diag($output);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.city"`;
+is(
+   $output + 0,
+   3,
+   'Only 3 rows copied'
+);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.city where city_id < 3"`;
+is(
+   $output + 0,
+   0,
+   'Rows, satisfying --where condition are not copied'
+) or diag($output);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.country"`;
+is(
+   $output + 0,
+   5,
+   'Table country not corrupted'
+) or diag($output);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.address"`;
+is(
+   $output + 0,
+   5,
+   'Table address not modified'
+) or diag($output);
+
+$sb->load_file('master', "$sample/basic_with_fks.sql");
+
+$output = output(
+   sub { pt_online_schema_change::main(@args, "$dsn,D=pt_osc,t=city",
+      '--alter', 'drop column last_update', '--where', 'city_id >= 3', '--execute',
+      '--alter-foreign-keys-method', 'drop_swap', '--force') }
+);
+
+like(
+   $output,
+   qr/Successfully altered/i,
+   'Option --where runs with --force and --alter-foreign-keys-method=drop_swap'
+) or diag($output);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.city"`;
+is(
+   $output + 0,
+   3,
+   'Only 3 rows copied'
+);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.city where city_id < 3"`;
+is(
+   $output + 0,
+   0,
+   'Rows, satisfying --where condition are not copied'
+) or diag($output);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.country"`;
+is(
+   $output + 0,
+   5,
+   'Table country not corrupted'
+) or diag($output);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.address"`;
+is(
+   $output + 0,
+   5,
+   'Table address not modified'
+) or diag($output);
+
+$sb->load_file('master', "$sample/basic_with_fks.sql");
+
+$output = output(
+   sub { pt_online_schema_change::main(@args, "$dsn,D=pt_osc,t=city",
+      '--alter', 'drop column last_update', '--where', 'city_id >= 3', '--execute',
+      '--alter-foreign-keys-method', 'none', '--force') }
+);
+
+like(
+   $output,
+   qr/Successfully altered/i,
+   'Option --where runs with --force and --alter-foreign-keys-method=none'
+) or diag($output);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.city"`;
+is(
+   $output + 0,
+   3,
+   'Only 3 rows copied'
+);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.city where city_id < 3"`;
+is(
+   $output + 0,
+   0,
+   'Rows, satisfying --where condition are not copied'
+) or diag($output);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.country"`;
+is(
+   $output + 0,
+   5,
+   'Table country not corrupted'
+) or diag($output);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.address"`;
+is(
+   $output + 0,
+   5,
+   'Table address not modified'
+) or diag($output);
+
+$sb->load_file('master', "$sample/basic_with_fks.sql");
+
+($output, $exit) = full_output(
+   sub { pt_online_schema_change::main(@args, "$dsn,D=pt_osc,t=city",
+      '--alter', 'drop column last_update', '--where', 'city_id >= 3', '--execute',
+      '--alter-foreign-keys-method', 'rebuild_constraints', 
+      '--no-drop-new-table', '--no-swap-tables') }
+);
+
+like(
+   $output,
+   qr/Child tables found and option --where specified. Rebuilding foreign key constraints may lead to errors./i,
+   'Option --where does not run without --force and --alter-foreign-keys-method=rebuild_constraints when child tables are found'
+) or diag($output);
+
+is(
+   $exit,
+   1,
+   'Exit code 1 with --where and child tables'
+);
+
+$output = `/tmp/12345/use -N -e "select count(*) from pt_osc.address"`;
+is(
+   $output + 0,
+   5,
+   'Table address not modified'
+) or diag($output);
+
+$sb->load_file('master', "$sample/basic_with_fks.sql");
+
+($output, $exit) = full_output(
+   sub { pt_online_schema_change::main(@args, "$dsn,D=pt_osc,t=city",
+      '--alter', 'drop column last_update', '--where', 'city_id >= 3', '--execute',
+      '--alter-foreign-keys-method', 'auto',
+      '--no-drop-new-table', '--no-swap-tables') }
+);
+
+like(
+   $output,
+   qr/Child tables found and option --where specified. Rebuilding foreign key constraints may lead to errors./i,
+   'Option --where does not run without --force and --alter-foreign-keys-method=auto when child tables are found'
+) or diag($output);
+
+is(
+   $exit,
+   1,
+   'Exit code 1 with --where and child tables'
+);
+
+# #############################################################################
+# Done.
+# #############################################################################
+
+$sb->wipe_clean($master_dbh);
+ok($sb->ok(), "Sandbox servers") or BAIL_OUT(__FILE__ . " broke the sandbox");
+#
+done_testing;