MDEV-6128:[PATCH] mysqlcheck wrongly escapes '.' in table names

a correct fix:
* store properly quoted table names in tables4repair/etc lists
* tell handle_request_for_tables whether the name is aalready properly quoted
* test cases for all uses of fix_table_name()

client/mysqlcheck.c

@@ -232,7 +232,7 @@ static int process_selected_tables(char *db, char **table_names, int tables);
 static int process_all_tables_in_db(char *database);
 static int process_one_db(char *database);
 static int use_db(char *database);
-static int handle_request_for_tables(char *tables, size_t length, my_bool view);
+static int handle_request_for_tables(char *, size_t, my_bool, my_bool);
 static int dbConnect(char *host, char *user,char *passwd);
 static void dbDisconnect(char *host);
 static void DBerror(MYSQL *mysql, const char *when);
@@ -566,7 +566,7 @@ static int process_selected_tables(char *db, char **table_names, int tables)
     }
     *--end = 0;
     handle_request_for_tables(table_names_comma_sep + 1, tot_length - 1,
-                              opt_do_views != 0);
+                              opt_do_views != 0, opt_all_in_1);
     my_free(table_names_comma_sep);
   }
   else
@@ -577,7 +577,7 @@ static int process_selected_tables(char *db, char **table_names, int tables)
       view= is_view(table);
       if (view < 0)
         continue;
-      handle_request_for_tables(table, table_len, (view == 1));
+      handle_request_for_tables(table, table_len, view == 1, opt_all_in_1);
     }
   DBUG_RETURN(0);
 } /* process_selected_tables */
@@ -605,13 +605,9 @@ static char *fix_table_name(char *dest, char *src)
   *dest++= '`';
   for (; *src; src++)
   {
-    switch (*src) {
-    case '`':            /* escape backtick character */
+    if (*src == '`')
       *dest++= '`';
-      /* fall through */
-    default:
-      *dest++= *src;
-    }
+    *dest++= *src;
   }
   *dest++= '`';
 
@@ -700,9 +696,9 @@ static int process_all_tables_in_db(char *database)
     *--end = 0;
     *--views_end = 0;
     if (tot_length)
-      handle_request_for_tables(tables + 1, tot_length - 1, FALSE);
+      handle_request_for_tables(tables + 1, tot_length - 1, FALSE, opt_all_in_1);
     if (tot_views_length)
-      handle_request_for_tables(views + 1, tot_views_length - 1, TRUE);
+      handle_request_for_tables(views + 1, tot_views_length - 1, TRUE, opt_all_in_1);
     my_free(tables);
     my_free(views);
   }
@@ -728,7 +724,7 @@ static int process_all_tables_in_db(char *database)
            !strcmp(row[0], "slow_log")))
         continue;                               /* Skip logging tables */
 
-      handle_request_for_tables(row[0], fixed_name_length(row[0]), view);
+      handle_request_for_tables(row[0], fixed_name_length(row[0]), view, opt_all_in_1);
     }
   }
   mysql_free_result(res);
@@ -787,13 +783,11 @@ static int rebuild_table(char *name)
   int rc= 0;
   DBUG_ENTER("rebuild_table");
 
-  query= (char*)my_malloc(sizeof(char) * (12 + fixed_name_length(name) + 6 + 1),
+  query= (char*)my_malloc(sizeof(char) * (12 + strlen(name) + 6 + 1),
                           MYF(MY_WME));
   if (!query)
     DBUG_RETURN(1);
-  ptr= strmov(query, "ALTER TABLE ");
-  ptr= fix_table_name(ptr, name);
-  ptr= strxmov(ptr, " FORCE", NullS);
+  ptr= strxmov(query, "ALTER TABLE ", name, " FORCE", NullS);
   if (mysql_real_query(sock, query, (ulong)(ptr - query)))
   {
     fprintf(stderr, "Failed to %s\n", query);
@@ -849,7 +843,8 @@ static int disable_binlog()
   return run_query(stmt);
 }
 
-static int handle_request_for_tables(char *tables, size_t length, my_bool view)
+static int handle_request_for_tables(char *tables, size_t length,
+                                     my_bool view, my_bool dont_quote)
 {
   char *query, *end, options[100], message[100];
   char table_name_buff[NAME_CHAR_LEN*2*2+1], *table_name;
@@ -907,7 +902,7 @@ static int handle_request_for_tables(char *tables, size_t length, my_bool view)
 
   if (!(query =(char *) my_malloc(query_size, MYF(MY_WME))))
     DBUG_RETURN(1);
-  if (opt_all_in_1)
+  if (dont_quote)
   {
     DBUG_ASSERT(strlen(op)+strlen(tables)+strlen(options)+8+1 <= query_size);
 
@@ -950,6 +945,13 @@ static int handle_request_for_tables(char *tables, size_t length, my_bool view)
   DBUG_RETURN(0);
 }
 
+static void insert_table_name(DYNAMIC_ARRAY *arr, char *in, size_t dblen)
+{
+  char buf[NAME_LEN*2+2];
+  in[dblen]= 0;
+  my_snprintf(buf, sizeof(buf), "%`s.%`s", in, in + dblen + 1);
+  insert_dynamic(arr, (uchar*) buf);
+}
 
 static void print_result()
 {
@@ -957,16 +959,13 @@ static void print_result()
   MYSQL_ROW row;
   char prev[(NAME_LEN+9)*3+2];
   char prev_alter[MAX_ALTER_STR_SIZE];
-  char *db_name;
-  uint length_of_db;
+  size_t length_of_db= strlen(sock->db);
   uint i;
   my_bool found_error=0, table_rebuild=0;
   DYNAMIC_ARRAY *array4repair= &tables4repair;
   DBUG_ENTER("print_result");
 
   res = mysql_use_result(sock);
-  db_name= sock->db;
-  length_of_db= strlen(db_name);
 
   prev[0] = '\0';
   prev_alter[0]= 0;
@@ -990,16 +989,10 @@ static void print_result()
           if (prev_alter[0])
             insert_dynamic(&alter_table_cmds, (uchar*) prev_alter);
           else
-          {
-            char *table_name= prev + (length_of_db+1);
-            insert_dynamic(&tables4rebuild, (uchar*) table_name);
-          }
+            insert_table_name(&tables4rebuild, prev, length_of_db);
         }
         else
-        {
-          char *table_name= prev + (length_of_db+1);
-          insert_dynamic(array4repair, (uchar*) table_name);
-        }
+          insert_table_name(array4repair, prev, length_of_db);
       }
       array4repair= &tables4repair;
       found_error=0;
@@ -1066,16 +1059,10 @@ static void print_result()
       if (prev_alter[0])
         insert_dynamic(&alter_table_cmds, (uchar*) prev_alter);
       else
-      {
-        char *table_name= prev + (length_of_db+1);
-        insert_dynamic(&tables4rebuild, (uchar*) table_name);
-      }
+        insert_table_name(&tables4rebuild, prev, length_of_db);
     }
     else
-    {
-      char *table_name= prev + (length_of_db+1);
-      insert_dynamic(array4repair, (uchar*) table_name);
-    }
+      insert_table_name(array4repair, prev, length_of_db);
   }
   mysql_free_result(res);
   DBUG_VOID_RETURN;
@@ -1209,7 +1196,7 @@ int main(int argc, char **argv)
     for (i = 0; i < tables4repair.elements ; i++)
     {
       char *name= (char*) dynamic_array_ptr(&tables4repair, i);
-      handle_request_for_tables(name, fixed_name_length(name), FALSE);
+      handle_request_for_tables(name, fixed_name_length(name), FALSE, TRUE);
     }
     for (i = 0; i < tables4rebuild.elements ; i++)
       rebuild_table((char*) dynamic_array_ptr(&tables4rebuild, i));
@@ -1220,7 +1207,7 @@ int main(int argc, char **argv)
     for (i = 0; i < views4repair.elements ; i++)
     {
       char *name= (char*) dynamic_array_ptr(&views4repair, i);
-      handle_request_for_tables(name, fixed_name_length(name), TRUE);
+      handle_request_for_tables(name, fixed_name_length(name), TRUE, TRUE);
     }
   }
   ret= test(first_error);

mysql-test/r/mysqlcheck.result

@@ -312,10 +312,37 @@ DROP TABLE bug47205;
 #
 #MDEV-6128:[PATCH] mysqlcheck wrongly escapes '.' in table names
 #
-CREATE TABLE test.`t.1` (id int);
+create table `t.1` (id int);
+create view `v.1` as select 1;
 mysqlcheck test t.1
 test.t.1                                           OK
-drop table test.`t.1`;
+mysqlcheck --all-in-1 test t.1
+test.t.1                                           OK
+mysqlcheck --all-in-1 --databases --process-views test
+test.t.1                                           OK
+test.v.1                                           OK
+create table `t.2`(a varchar(20) primary key) default character set utf8 collate utf8_general_ci engine=innodb;
+flush table `t.2`;
+mysqlcheck --check-upgrade --auto-repair test
+test.t.1                                           OK
+test.t.2
+error    : Table rebuild required. Please do "ALTER TABLE `t.2` FORCE" or dump/reload to fix it!
+test.t.3                                           Needs upgrade
+
+Repairing tables
+test.t.3                                           OK
+check table `t.1`, `t.2`, `t.3`;
+Table	Op	Msg_type	Msg_text
+test.t.1	check	status	OK
+test.t.2	check	status	OK
+test.t.3	check	status	OK
+check table `t.1`, `t.2`, `t.3` for upgrade;
+Table	Op	Msg_type	Msg_text
+test.t.1	check	status	OK
+test.t.2	check	status	OK
+test.t.3	check	status	OK
+drop view `v.1`;
+drop table test.`t.1`, `t.2`, `t.3`;
 create view v1 as select 1;
 mysqlcheck --process-views test
 test.v1                                            OK
@@ -344,3 +371,48 @@ show tables;
 Tables_in_test
 t1`1
 drop table `t1``1`;
+call mtr.add_suppression("ha_myisam");
+call mtr.add_suppression("Checking table");
+create database mysqltest1;
+create table mysqltest1.t1 (a int) engine=myisam;
+create table t2 (a int);
+check table mysqltest1.t1;
+Table	Op	Msg_type	Msg_text
+mysqltest1.t1	check	warning	Size of datafile is: 4       Should be: 0
+mysqltest1.t1	check	error	got error: 0 when reading datafile at record: 0
+mysqltest1.t1	check	error	Corrupt
+mtr.global_suppressions                            Table is already up to date
+mtr.test_suppressions                              Table is already up to date
+mysql.columns_priv                                 Table is already up to date
+mysql.db                                           Table is already up to date
+mysql.event                                        Table is already up to date
+mysql.func                                         Table is already up to date
+mysql.help_category                                Table is already up to date
+mysql.help_keyword                                 Table is already up to date
+mysql.help_relation                                Table is already up to date
+mysql.help_topic                                   Table is already up to date
+mysql.host                                         Table is already up to date
+mysql.ndb_binlog_index                             Table is already up to date
+mysql.plugin                                       Table is already up to date
+mysql.proc                                         Table is already up to date
+mysql.procs_priv                                   Table is already up to date
+mysql.proxies_priv                                 Table is already up to date
+mysql.servers                                      Table is already up to date
+mysql.tables_priv                                  Table is already up to date
+mysql.time_zone                                    Table is already up to date
+mysql.time_zone_leap_second                        Table is already up to date
+mysql.time_zone_name                               Table is already up to date
+mysql.time_zone_transition                         Table is already up to date
+mysql.time_zone_transition_type                    Table is already up to date
+mysql.user                                         Table is already up to date
+mysqltest1.t1
+warning  : Table is marked as crashed
+warning  : Size of datafile is: 4       Should be: 0
+error    : got error: 0 when reading datafile at record: 0
+error    : Corrupt
+test.t2                                            Table is already up to date
+
+Repairing tables
+mysqltest1.t1                                      OK
+drop table t2;
+drop database mysqltest1;

mysql-test/t/mysqlcheck.test

@@ -310,15 +310,36 @@ CHECK TABLE bug47205 FOR UPGRADE;
 
 DROP TABLE bug47205;
 
+
 --echo #
 --echo #MDEV-6128:[PATCH] mysqlcheck wrongly escapes '.' in table names
 --echo #
-CREATE TABLE test.`t.1` (id int);
+create table `t.1` (id int);
+create view `v.1` as select 1;
 
 --echo mysqlcheck test t.1
 --exec $MYSQL_CHECK test t.1
+--echo mysqlcheck --all-in-1 test t.1
+--exec $MYSQL_CHECK --all-in-1 test t.1
+--echo mysqlcheck --all-in-1 --databases --process-views test
+--exec $MYSQL_CHECK --all-in-1 --databases --process-views test
+
+create table `t.2`(a varchar(20) primary key) default character set utf8 collate utf8_general_ci engine=innodb;
+flush table `t.2`;
+--remove_file $MYSQLD_DATADIR/test/t@002e2.frm
+--copy_file std_data/bug47205.frm $MYSQLD_DATADIR/test/t@002e2.frm
+
+--copy_file std_data/bug36055.frm $MYSQLD_DATADIR/test/t@002e3.frm
+--copy_file std_data/bug36055.MYD $MYSQLD_DATADIR/test/t@002e3.MYD
+--copy_file std_data/bug36055.MYI $MYSQLD_DATADIR/test/t@002e3.MYI
 
-drop table test.`t.1`;
+--echo mysqlcheck --check-upgrade --auto-repair test
+--exec $MYSQL_CHECK --check-upgrade --auto-repair test
+
+check table `t.1`, `t.2`, `t.3`;
+check table `t.1`, `t.2`, `t.3` for upgrade;
+drop view `v.1`;
+drop table test.`t.1`, `t.2`, `t.3`;
 
 #
 # MDEV-8123 mysqlcheck: new --process-views option conflicts with --quick, --extended and such
@@ -355,3 +376,25 @@ create table `#mysql50#t1``1` (a int) engine=myisam;
 --exec $MYSQL_CHECK --fix-table-names --databases test
 show tables;
 drop table `t1``1`;
+
+#
+#     MDEV-9440 mysqlcheck -A --auto-repair selects wrong database when trying to repair broken table
+#
+call mtr.add_suppression("ha_myisam");
+call mtr.add_suppression("Checking table");
+create database mysqltest1;
+create table mysqltest1.t1 (a int) engine=myisam;
+create table t2 (a int);
+
+let $datadir= `select @@datadir`;
+remove_file $datadir/mysqltest1/t1.MYD;
+write_file $datadir/mysqltest1/t1.MYD;
+foo
+EOF
+
+check table mysqltest1.t1;
+
+--exec $MYSQL_CHECK -A --auto-repair --fast
+
+drop table t2;
+drop database mysqltest1;