diff --git a/bin/pt-show-grants b/bin/pt-show-grants
index 1e5dc110..d73a6157 100755
--- a/bin/pt-show-grants
+++ b/bin/pt-show-grants
@@ -1636,10 +1636,16 @@ sub _d {
 # ###########################################################################
 package pt_show_grants;
 
+use strict;
+use warnings FATAL => 'all';
 use English qw(-no_match_vars);
-
 use constant PTDEBUG => $ENV{PTDEBUG} || 0;
 
+use Data::Dumper;
+$Data::Dumper::Quotekeys = 0;
+$Data::Dumper::Indent    = 1;
+$Data::Dumper::Sortkeys  = 1;
+
 sub main {
    @ARGV = @_;  # set global ARGV for this package
 
@@ -1757,13 +1763,17 @@ sub main {
          PTDEBUG && _d($EVAL_ERROR);
          $exit_status = 1;
       }
+      PTDEBUG && _d('Grants:', Dumper(\@grants));
       next unless @grants;
 
-      if ( $o->get('separate') ) { # List each grant separately.
+      if ( $o->get('separate') ) {
+         # List each grant separately.
          @grants = map {
             my ( $grants, $on_what ) = $_ =~ m/GRANT (.*?) ON (.*)$/;
-            map { "GRANT $_ ON $on_what" } split(', ', $grants);
+            map { "GRANT $_ ON $on_what" } split_grants($grants);
          } @grants;
+         PTDEBUG && _d('Grants separated:', Dumper(\@grants));
+
          my $count;
          # If the row with IDENTIFIED BY has multiple grants, this will
          # create many such rows; strip it from all but the first.
@@ -1775,12 +1785,15 @@ sub main {
             }
             $_;
          } @grants;
+         PTDEBUG && _d('Grants separated:', Dumper(\@grants));
       }
-      else { # Sort the actual grants lexically within each row for consistency.
+      else {
+         # Sort the actual grants lexically within each row for consistency.
          @grants = map {
-            $_ =~ s/GRANT (.*?) ON (`|\*)/"GRANT " . join(', ', sort(split(', ', $1))) . " ON $2"/e;
+            $_ =~ s/GRANT (.*?) ON (`|\*)/"GRANT " . join(', ', sort(split_grants($1))) . " ON $2"/e;
             $_;
          } @grants;
+         PTDEBUG && _d('Grants grouped:', Dumper(\@grants));
       }
 
       # Sort the grant rows for consistency too, but the one with the password
@@ -1788,6 +1801,7 @@ sub main {
       @grants = sort {
          $b =~ m/IDENTIFIED BY/ <=> $a =~ m/IDENTIFIED BY/ || $a cmp $b
       } @grants;
+      PTDEBUG && _d('Grants sorted:', Dumper(\@grants));
 
       # Print REVOKE statements.
       if ( $o->get('revoke') ) {
@@ -1802,7 +1816,7 @@ sub main {
             my @result;
             if ( $o->get('separate') ) {
                @result = map { "REVOKE $_ ON $on_what FROM $user" }
-                  split(', ', $grants);
+                  split_grants($grants);
             }
             else {
                @result = "REVOKE $grants ON $on_what FROM $user";
@@ -1867,6 +1881,31 @@ sub parse_user {
    return ( $user, $host );
 }
 
+sub split_grants {
+   my ($grants) = @_;
+   return unless $grants;
+   my @grants;
+   if ( $grants =~ m/(?:INSERT|SELECT|UPDATE) \(/ ) {
+      PTDEBUG && _d('Splitting grants on keywords:', $grants);
+      # TODO: the following .+? might break (e.g. on `annoying)column`).
+      # Remember to update this whenever we switch to using
+      # a common SQL regex module
+      @grants = $grants =~ m/
+            (
+                (?:INSERT|SELECT|UPDATE)\s\(.+?\) # a column grants
+              | [A-Z\s]+
+            )
+            (?:,\s)?    # Separted from the next grant, if any, by a comma
+      /xg;
+   }
+   else {
+      PTDEBUG && _d('Splitting grants on comma:', $grants);
+      @grants = split(', ', $grants);
+   }
+   PTDEBUG && _d('Grants split:', Dumper(\@grants));
+   return @grants;
+}
+
 sub _d {
    my ($package, undef, $line) = caller 0;
    @_ = map { (my $temp = $_) =~ s/\n/\n# /g; $temp; }
@@ -1894,7 +1933,7 @@ pt-show-grants - Canonicalize and print MySQL grants so you can effectively repl
 
 =head1 SYNOPSIS
 
-Usage: pt-show-grants [OPTION...] [DSN]
+Usage: pt-show-grants [OPTIONS] [DSN]
 
 pt-show-grants shows grants (user privileges) from a MySQL server.
 
diff --git a/t/pt-show-grants/basics.t b/t/pt-show-grants/basics.t
index 351a07ce..d526ffea 100644
--- a/t/pt-show-grants/basics.t
+++ b/t/pt-show-grants/basics.t
@@ -22,9 +22,6 @@ my $dbh = $sb->get_dbh_for('master');
 if ( !$dbh ) {
    plan skip_all => 'Cannot connect to sandbox master';
 }
-else {
-   plan tests => 11;
-}
 
 $sb->wipe_clean($dbh);
 
@@ -94,8 +91,59 @@ like(
    'No output when all users skipped'
 );
 
+# #############################################################################
+# pt-show-grant doesn't support column-level grants
+# https://bugs.launchpad.net/percona-toolkit/+bug/866075
+# #############################################################################
+$sb->load_file('master', 't/pt-show-grants/samples/column-grants.sql');
+diag(`/tmp/12345/use -u root -e "GRANT SELECT(DateCreated, PckPrice, PaymentStat, SANumber) ON test.t TO 'sally'\@'%'"`);
+diag(`/tmp/12345/use -u root -e "GRANT SELECT(city_id), INSERT(city) ON sakila.city TO 'sally'\@'%'"`);
+
+ok(
+   no_diff(
+      sub { pt_show_grants::main('-F', $cnf, qw(--only sally --no-header)) },
+      "t/pt-show-grants/samples/column-grants.txt",
+      stderr => 1,
+   ),
+   "Column-level grants (bug 866075)"
+);
+
+ok(
+   no_diff(
+      sub { pt_show_grants::main('-F', $cnf, qw(--only sally --no-header),
+         qw(--separate)) },
+      "t/pt-show-grants/samples/column-grants-separate.txt",
+      stderr => 1,
+   ),
+   "Column-level grants --separate (bug 866075)"
+);
+
+ok(
+   no_diff(
+      sub { pt_show_grants::main('-F', $cnf, qw(--only sally --no-header),
+         qw(--separate --revoke)) },
+      "t/pt-show-grants/samples/column-grants-separate-revoke.txt",
+      stderr => 1,
+   ),
+   "Column-level grants --separate --revoke (bug 866075)"
+);
+
+diag(`/tmp/12345/use -u root -e "GRANT SELECT ON sakila.city TO 'sally'\@'%'"`);
+
+ok(
+   no_diff(
+      sub { pt_show_grants::main('-F', $cnf, qw(--only sally --no-header)) },
+      "t/pt-show-grants/samples/column-grants-combined.txt",
+      stderr => 1,   
+   ),
+   "Column-level grants combined with table-level grants on the same table (bug 866075)"
+);
+
+diag(`/tmp/12345/use -u root -e "DROP USER 'sally'\@'%'"`);
+
 # #############################################################################
 # Done.
 # #############################################################################
+$sb->wipe_clean($dbh);
 ok($sb->ok(), "Sandbox servers") or BAIL_OUT(__FILE__ . " broke the sandbox");
-exit;
+done_testing;
diff --git a/t/pt-show-grants/samples/column-grants-combined.txt b/t/pt-show-grants/samples/column-grants-combined.txt
new file mode 100644
index 00000000..fd679980
--- /dev/null
+++ b/t/pt-show-grants/samples/column-grants-combined.txt
@@ -0,0 +1,4 @@
+-- Grants for 'sally'@'%'
+GRANT INSERT (city), SELECT, SELECT (city_id) ON `sakila`.`city` TO 'sally'@'%';
+GRANT SELECT (SANumber, DateCreated, PaymentStat, PckPrice) ON `test`.`t` TO 'sally'@'%';
+GRANT USAGE ON *.* TO 'sally'@'%';
diff --git a/t/pt-show-grants/samples/column-grants-separate-revoke.txt b/t/pt-show-grants/samples/column-grants-separate-revoke.txt
new file mode 100644
index 00000000..157350be
--- /dev/null
+++ b/t/pt-show-grants/samples/column-grants-separate-revoke.txt
@@ -0,0 +1,10 @@
+-- Revoke statements for 'sally'@'%'
+REVOKE INSERT (city) ON `sakila`.`city` FROM 'sally'@'%';
+REVOKE SELECT (SANumber, DateCreated, PaymentStat, PckPrice) ON `test`.`t` FROM 'sally'@'%';
+REVOKE SELECT (city_id) ON `sakila`.`city` FROM 'sally'@'%';
+REVOKE USAGE ON *.* FROM 'sally'@'%';
+-- Grants for 'sally'@'%'
+GRANT INSERT (city) ON `sakila`.`city` TO 'sally'@'%';
+GRANT SELECT (SANumber, DateCreated, PaymentStat, PckPrice) ON `test`.`t` TO 'sally'@'%';
+GRANT SELECT (city_id) ON `sakila`.`city` TO 'sally'@'%';
+GRANT USAGE ON *.* TO 'sally'@'%';
diff --git a/t/pt-show-grants/samples/column-grants-separate.txt b/t/pt-show-grants/samples/column-grants-separate.txt
new file mode 100644
index 00000000..9b6361d9
--- /dev/null
+++ b/t/pt-show-grants/samples/column-grants-separate.txt
@@ -0,0 +1,5 @@
+-- Grants for 'sally'@'%'
+GRANT INSERT (city) ON `sakila`.`city` TO 'sally'@'%';
+GRANT SELECT (SANumber, DateCreated, PaymentStat, PckPrice) ON `test`.`t` TO 'sally'@'%';
+GRANT SELECT (city_id) ON `sakila`.`city` TO 'sally'@'%';
+GRANT USAGE ON *.* TO 'sally'@'%';
diff --git a/t/pt-show-grants/samples/column-grants.sql b/t/pt-show-grants/samples/column-grants.sql
new file mode 100644
index 00000000..b805c298
--- /dev/null
+++ b/t/pt-show-grants/samples/column-grants.sql
@@ -0,0 +1,18 @@
+drop database if exists test;
+create database test;
+use test;
+
+CREATE TABLE t (
+  `SOrNum` mediumint(9) unsigned NOT NULL auto_increment,
+  `SPNum` mediumint(9) unsigned NOT NULL,
+  `DateCreated` timestamp NOT NULL default CURRENT_TIMESTAMP,
+  `DateRelease` timestamp NOT NULL default '0000-00-00 00:00:00',
+  `ActualReleasedDate` timestamp NULL default NULL,
+  `PckPrice` decimal(10,2) NOT NULL default '0.00',
+  `Status` varchar(20) NOT NULL,
+  `PaymentStat` varchar(20) NOT NULL default 'Unpaid',
+  `CusCode` int(9) unsigned NOT NULL,
+  `SANumber` mediumint(9) unsigned NOT NULL default '0',
+  `SpecialInstruction` varchar(500) default NULL,
+  PRIMARY KEY (`SOrNum`)
+) ENGINE=InnoDB;
diff --git a/t/pt-show-grants/samples/column-grants.txt b/t/pt-show-grants/samples/column-grants.txt
new file mode 100644
index 00000000..54feb4a5
--- /dev/null
+++ b/t/pt-show-grants/samples/column-grants.txt
@@ -0,0 +1,4 @@
+-- Grants for 'sally'@'%'
+GRANT INSERT (city), SELECT (city_id) ON `sakila`.`city` TO 'sally'@'%';
+GRANT SELECT (SANumber, DateCreated, PaymentStat, PckPrice) ON `test`.`t` TO 'sally'@'%';
+GRANT USAGE ON *.* TO 'sally'@'%';