Fixed bug in restoring auto-increment value in case of duplicate key with insert or update

Fixed bug when calculating max_key_length that caused some ALTER TABLE to fail if MAX_ROWS was used.
Use maria_block_size instead of MARIA_MIN_KEY_BLOCK_LENGTH
Fixed bug when scanning table with BLOCK format for repair; If table was > bitmap coverage one page block was read twice which caused a lot of duplicate key errors
Could not repeat Bug#34106 "auto_increment is reset to 1 when table is recovered from crash" after this patch.

NOTE: This is an incompatible change, so one must do maria_chk -r on ones old Maria tables!
Sorry, but this was needed to fix the bug with max_key_length and to be able to handle bigger key files with smaller key references


cmd-line-utils/readline/readline.c:
  Fixed compiler warnings
mysql-test/r/maria.result:
  Added more test of auto-increment handling
mysql-test/t/maria.test:
  Added more test of auto-increment handling
mysys/my_pread.c:
  Fixed wrong test
  Removed not needed tests (error is always 1 if readbytes != Count)
mysys/my_read.c:
  Fixed wrong test
storage/maria/ha_maria.cc:
  Disable LOAD INDEX until I got Sanja's extension to pagecache interface
storage/maria/ma_blockrec.c:
  Ensure that info->last_auto_increment is reset properly
storage/maria/ma_check.c:
  Fixed wrong printing of row number in case of duplicate key for --safe-repair
  Safety fix in recreate table so that Column numbers are given to maria_create() in original order
  Added missing HA_OPEN_FOR_REPAIR to maria_open()
  Fixed bug when scanning table with BLOCK format for repair; If table was > bitmap coverage one page block was read twice which caused a lot of duplicate key errors
storage/maria/ma_create.c:
  Use correct value for how much free space there is on a key page
  Remember some missing table option when doing re-create.
  Removed optimization where last packed fields is unpacked; Caused problems for re-create.
storage/maria/ma_delete.c:
  Ensure that info->last_auto_increment is reset properly
  Fix for update to restore autoincrement value on duplicate key
storage/maria/ma_key_recover.c:
  Moved handling of restoring value of auto-increment in case of duplicate key from clr to undo
  This ensures the restoring works both for insert and update and also that this is symetrical to how the auto_increment value is stored
storage/maria/ma_key_recover.h:
  Added new prototype
storage/maria/ma_loghandler.c:
  Added hook to write_hook_for_undo_key_delete()
storage/maria/ma_open.c:
  Fixed wrong calculation of max_key_file_length
storage/maria/ma_page.c:
  Use maria_block_size instead of MARIA_MIN_KEY_BLOCK_LENGTH
  Increase internal buffer (safety fix)
storage/maria/ma_search.c:
  Use maria_block_size instead of MARIA_MIN_KEY_BLOCK_LENGTH
  Note that this is an incompatible change, so one must do maria_chk -r on ones old Maria tables (sorry)
storage/maria/ma_update.c:
  Ensure that info->last_auto_increment is reset properly
storage/maria/ma_write.c:
  Ensure that info->last_auto_increment is reset properly
  Fix for update to restore autoincrement value on duplicate key
storage/maria/maria_chk.c:
  Allow small page_buffer_size
  Fixed printing for --describe to better fit into 80 characters
storage/maria/maria_def.h:
  Added comments

cmd-line-utils/readline/readline.c

@@ -90,7 +90,6 @@ static void bind_arrow_keys_internal PARAMS((Keymap));
 static void bind_arrow_keys PARAMS((void));
 
 static void readline_default_bindings PARAMS((void));
-static void reset_default_bindings PARAMS((void));
 
 static int _rl_subseq_result PARAMS((int, Keymap, int, int));
 static int _rl_subseq_getchar PARAMS((int));
@@ -287,7 +286,7 @@ rl_set_prompt (prompt)
 {
   FREE (rl_prompt);
   rl_prompt = prompt ? savestring (prompt) : (char *)NULL;
-  rl_display_prompt = rl_prompt ? rl_prompt : "";
+  rl_display_prompt = rl_prompt ? rl_prompt : (char*) "";
 
   rl_visible_prompt_length = rl_expand_prompt (rl_prompt);
   return 0;
@@ -1072,18 +1071,6 @@ readline_default_bindings ()
     rl_tty_set_default_bindings (_rl_keymap);
 }
 
-/* Reset the default bindings for the terminal special characters we're
-   interested in back to rl_insert and read the new ones. */
-static void
-reset_default_bindings ()
-{
-  if (_rl_bind_stty_chars)
-    {
-      rl_tty_unset_default_bindings (_rl_keymap);
-      rl_tty_set_default_bindings (_rl_keymap);
-    }
-}
-
 /* Bind some common arrow key sequences in MAP. */
 static void
 bind_arrow_keys_internal (map)

mysql-test/r/maria.result

@@ -2200,3 +2200,45 @@ id	f1
 2	test2
 drop table t1;
 SET SQL_MODE = 'TRADITIONAL';
+create table t1 (n int not null primary key auto_increment, c char(1), unique(c));
+insert into t1 values(100, "a");
+insert into t1 values(300, "b");
+insert into t1 values(50, "a");
+ERROR 23000: Duplicate entry 'a' for key 'c'
+insert into t1 values(null, "c");
+select * from t1;
+n	c
+100	a
+300	b
+301	c
+update t1 set n=400,c='a' where n=301;
+ERROR 23000: Duplicate entry 'a' for key 'c'
+insert into t1 values(null, "d");
+select * from t1;
+n	c
+100	a
+300	b
+301	c
+302	d
+drop table t1;
+create table t1 (n int not null primary key auto_increment, c char(1), unique(c)) transactional=0 row_format=dynamic;
+insert into t1 values(100, "a");
+insert into t1 values(300, "b");
+insert into t1 values(50, "a");
+ERROR 23000: Duplicate entry 'a' for key 'c'
+insert into t1 values(null, "c");
+select * from t1;
+n	c
+100	a
+300	b
+301	c
+update t1 set n=400,c='a' where n=301;
+ERROR 23000: Duplicate entry 'a' for key 'c'
+insert into t1 values(null, "d");
+select * from t1;
+n	c
+100	a
+300	b
+301	c
+302	d
+drop table t1;

mysql-test/t/maria.test

@@ -1426,6 +1426,33 @@ SELECT * FROM t1;
 drop table t1;
 SET SQL_MODE = 'TRADITIONAL';
 
+create table t1 (n int not null primary key auto_increment, c char(1), unique(c));
+insert into t1 values(100, "a");
+insert into t1 values(300, "b");
+--error 1062
+insert into t1 values(50, "a");
+insert into t1 values(null, "c");
+select * from t1;
+--error 1062
+update t1 set n=400,c='a' where n=301;
+insert into t1 values(null, "d");
+select * from t1;
+drop table t1;
+
+create table t1 (n int not null primary key auto_increment, c char(1), unique(c)) transactional=0 row_format=dynamic;
+insert into t1 values(100, "a");
+insert into t1 values(300, "b");
+--error 1062
+insert into t1 values(50, "a");
+insert into t1 values(null, "c");
+select * from t1;
+--error 1062
+update t1 set n=400,c='a' where n=301;
+insert into t1 values(null, "d");
+select * from t1;
+drop table t1;
+
+
 # End of 5.2 tests
 
 --disable_result_log

mysys/my_pread.c

@@ -66,11 +66,12 @@ size_t my_pread(File Filedes, uchar *Buffer, size_t Count, my_off_t offset,
     if ((error= ((readbytes= pread(Filedes, Buffer, Count, offset)) != Count)))
     {
       my_errno= errno;
-      if (errno == 0 || (errno == -1 && (MyFlags & (MY_NABP | MY_FNABP))))
+      if (errno == 0 || (readbytes == (size_t) -1 &&
+                         (MyFlags & (MY_NABP | MY_FNABP))))
         my_errno= HA_ERR_FILE_TOO_SHORT;
     }
 #endif
-    if (error || readbytes != Count)
+    if (error)
     {
       DBUG_PRINT("warning",("Read only %d bytes off %u from %d, errno: %d",
                             (int) readbytes, (uint) Count,Filedes,my_errno));

mysys/my_read.c

@@ -47,7 +47,8 @@ size_t my_read(File Filedes, uchar *Buffer, size_t Count, myf MyFlags)
     if ((readbytes= read(Filedes, Buffer, Count)) != Count)
     {
       my_errno= errno;
-      if (errno == 0 || (errno == -1 && (MyFlags & (MY_NABP | MY_FNABP))))
+      if (errno == 0 || (readbytes == (size_t) -1 &&
+                         (MyFlags & (MY_NABP | MY_FNABP))))
         my_errno= HA_ERR_FILE_TOO_SHORT;
       DBUG_PRINT("warning",("Read only %d bytes off %lu from %d, errno: %d",
                             (int) readbytes, (ulong) Count, Filedes,

storage/maria/ha_maria.cc

@@ -1491,6 +1491,7 @@ int ha_maria::preload_keys(THD * thd, HA_CHECK_OPT *check_opt)
   maria_extra(file, HA_EXTRA_PRELOAD_BUFFER_SIZE,
               (void*) &thd->variables.preload_buff_size);
 
+#ifndef NOT_YET
   if ((error= maria_preload(file, map, ignore_leaves)))
   {
     switch (error) {
@@ -1508,7 +1509,7 @@ int ha_maria::preload_keys(THD * thd, HA_CHECK_OPT *check_opt)
     error= HA_ADMIN_FAILED;
     goto err;
   }
-
+#endif
   DBUG_RETURN(HA_ADMIN_OK);
 
 err:

storage/maria/ma_blockrec.c

@@ -6415,6 +6415,7 @@ my_bool _ma_apply_undo_row_insert(MARIA_HA *info, LSN undo_lsn,
   checksum= 0;
   if (share->calc_checksum)
     checksum= (ha_checksum) 0 - ha_checksum_korr(header);
+  info->last_auto_increment= ~ (ulonglong) 0;
   if (_ma_write_clr(info, undo_lsn, LOGREC_UNDO_ROW_INSERT,
                     share->calc_checksum != 0, checksum, &lsn, (void*) 0))
     goto err;
@@ -6815,6 +6816,7 @@ my_bool _ma_apply_undo_row_update(MARIA_HA *info, LSN undo_lsn,
                 (*share->calc_checksum)(info, current_record));
   }
 
+  info->last_auto_increment= ~ (ulonglong) 0;
   /* Now records are up to date, execute the update to original values */
   if (_ma_update_at_original_place(info, page, rownr, length_on_head_page,
                                    extent_count, extent_info,

storage/maria/ma_check.c

@@ -2361,11 +2361,11 @@ int maria_repair(HA_CHECK *param, register MARIA_HA *info,
       if (my_errno != HA_ERR_FOUND_DUPP_KEY)
 	goto err;
       DBUG_DUMP("record",(uchar*) sort_param.record,share->base.pack_reclength);
-      _ma_check_print_info(param,
-                           "Duplicate key %2d for record at %10s against new record at %10s",
-			  info->errkey+1,
-			  llstr(sort_param.start_recpos,llbuff),
-			  llstr(info->dup_key_pos,llbuff2));
+      _ma_check_print_warning(param,
+                              "Duplicate key %2d for record at %10s against new record at %10s",
+                              info->errkey+1,
+                              llstr(sort_param.current_filepos, llbuff),
+                              llstr(info->dup_key_pos,llbuff2));
       if (param->testflag & T_VERBOSE)
       {
 	VOID(_ma_make_key(info,(uint) info->errkey,info->lastkey,
@@ -4972,13 +4972,14 @@ static int sort_key_write(MARIA_SORT_PARAM *sort_param, const uchar *a)
                                                          sort_param->keyinfo,
                                                          a);
     _ma_check_print_warning(param,
-			   "Duplicate key for record at %10s against record at %10s",
-			   llstr(sort_info->info->cur_row.lastpos, llbuff),
-			   llstr(get_record_for_key(sort_info->info,
-						    sort_param->keyinfo,
-						    sort_info->key_block->
-						    lastkey),
-				 llbuff2));
+			   "Duplicate key %2u for record at %10s against record at %10s",
+                            sort_param->key + 1,
+                            llstr(sort_info->info->cur_row.lastpos, llbuff),
+                            llstr(get_record_for_key(sort_info->info,
+                                                     sort_param->keyinfo,
+                                                     sort_info->key_block->
+                                                     lastkey),
+                                  llbuff2));
     param->testflag|=T_RETRY_WITHOUT_QUICK;
     if (sort_info->param->testflag & T_VERBOSE)
       _ma_print_key(stdout,sort_param->seg, a, USE_WHOLE_KEY);
@@ -5409,7 +5410,8 @@ int maria_test_if_almost_full(MARIA_HA *info)
     (my_off_t) share->base.max_data_file_length;
 }
 
-	/* Recreate table with bigger more alloced record-data */
+
+/* Recreate table with bigger more alloced record-data */
 
 int maria_recreate_table(HA_CHECK *param, MARIA_HA **org_info, char *filename)
 {
@@ -5432,8 +5434,8 @@ int maria_recreate_table(HA_CHECK *param, MARIA_HA **org_info, char *filename)
   status_info= (*org_info)->state[0];
   info.state= &status_info;
   share= *(*org_info)->s;
-  unpack= (share.options & HA_OPTION_COMPRESS_RECORD) &&
-    (param->testflag & T_UNPACK);
+  unpack= ((share.data_file_type == COMPRESSED_RECORD) &&
+           (param->testflag & T_UNPACK));
   if (!(keyinfo=(MARIA_KEYDEF*) my_alloca(sizeof(MARIA_KEYDEF) *
                                           share.base.keys)))
     DBUG_RETURN(0);
@@ -5463,19 +5465,11 @@ int maria_recreate_table(HA_CHECK *param, MARIA_HA **org_info, char *filename)
     DBUG_RETURN(1);
   }
 
-  /* Copy the column definitions */
-  memcpy((uchar*) columndef,(uchar*) share.columndef,
-	 (size_t) (sizeof(MARIA_COLUMNDEF)*(share.base.fields+1)));
-  for (column=columndef, end= columndef+share.base.fields;
+  /* Copy the column definitions in their original order */
+  for (column= share.columndef, end= share.columndef+share.base.fields;
        column != end ;
        column++)
-  {
-    if (unpack && !(share.options & HA_OPTION_PACK_RECORD) &&
-	column->type != FIELD_BLOB &&
-	column->type != FIELD_VARCHAR &&
-	column->type != FIELD_CHECK)
-      column->type=(int) FIELD_NORMAL;
-  }
+    columndef[column->column_nr]= *column;
 
   /* Change the new key to point at the saved key segments */
   memcpy((uchar*) keysegs,(uchar*) share.keyparts,
@@ -5505,25 +5499,23 @@ int maria_recreate_table(HA_CHECK *param, MARIA_HA **org_info, char *filename)
     u_ptr->seg=keyseg;
     keyseg+=u_ptr->keysegs+1;
   }
+
+  file_length=(ulonglong) my_seek(info.dfile.file, 0L, MY_SEEK_END, MYF(0));
   if (share.options & HA_OPTION_COMPRESS_RECORD)
     share.base.records=max_records=info.state->records;
   else if (share.base.min_pack_length)
-    max_records=(ha_rows) (my_seek(info.dfile.file, 0L, MY_SEEK_END,
-                                   MYF(0)) /
-			   (ulong) share.base.min_pack_length);
+    max_records=(ha_rows) (file_length / share.base.min_pack_length);
   else
     max_records=0;
-  unpack= (share.data_file_type == COMPRESSED_RECORD) &&
-    (param->testflag & T_UNPACK);
   share.options&= ~HA_OPTION_TEMP_COMPRESS_RECORD;
 
-  file_length=(ulonglong) my_seek(info.dfile.file, 0L, MY_SEEK_END, MYF(0));
   tmp_length= file_length+file_length/10;
   set_if_bigger(file_length,param->max_data_file_length);
   set_if_bigger(file_length,tmp_length);
   set_if_bigger(file_length,(ulonglong) share.base.max_data_file_length);
 
   VOID(maria_close(*org_info));
+
   bzero((char*) &create_info,sizeof(create_info));
   create_info.max_rows=max(max_records,share.base.records);
   create_info.reloc_rows=share.base.reloc;
@@ -5544,6 +5536,8 @@ int maria_recreate_table(HA_CHECK *param, MARIA_HA **org_info, char *filename)
   */
   create_info.with_auto_increment= TRUE;
   create_info.null_bytes= share.base.null_bytes;
+  create_info.transactional= share.base.born_transactional;
+
   /*
     We don't have to handle symlinks here because we are using
     HA_DONT_TOUCH_DATA
@@ -5560,10 +5554,13 @@ int maria_recreate_table(HA_CHECK *param, MARIA_HA **org_info, char *filename)
                           my_errno);
     goto end;
   }
-  *org_info=maria_open(filename,O_RDWR,
-		    (param->testflag & T_WAIT_FOREVER) ? HA_OPEN_WAIT_IF_LOCKED :
-		    (param->testflag & T_DESCRIPT) ? HA_OPEN_IGNORE_IF_LOCKED :
-		    HA_OPEN_ABORT_IF_LOCKED);
+  *org_info= maria_open(filename,O_RDWR,
+                        (HA_OPEN_FOR_REPAIR |
+                         ((param->testflag & T_WAIT_FOREVER) ?
+                          HA_OPEN_WAIT_IF_LOCKED :
+                          (param->testflag & T_DESCRIPT) ?
+                          HA_OPEN_IGNORE_IF_LOCKED :
+                          HA_OPEN_ABORT_IF_LOCKED)));
   if (!*org_info)
   {
     _ma_check_print_error(param,
@@ -6143,7 +6140,11 @@ read_next_page:
       sort_info->page++;                        /* In case of errors */
       page++;
       if (!(page % share->bitmap.pages_covered))
-        page++;                                 /* Skip bitmap */
+      {
+        /* Skip bitmap */
+        page++;
+        sort_info->page++;
+      }
       if ((my_off_t) (page + 1) * share->block_size > sort_info->filelength)
         DBUG_RETURN(HA_ERR_END_OF_FILE);
       if (!(pagecache_read(share->pagecache,

storage/maria/ma_create.c

@@ -97,15 +97,18 @@ int maria_create(const char *name, enum data_file_type datafile_type,
   {
     org_datafile_type= ci->org_data_file_type;
     if (!(ci->old_options & HA_OPTION_TEMP_COMPRESS_RECORD))
-      options=ci->old_options &
-	(HA_OPTION_COMPRESS_RECORD | HA_OPTION_PACK_RECORD |
-	 HA_OPTION_READ_ONLY_DATA | HA_OPTION_CHECKSUM |
-	 HA_OPTION_TMP_TABLE | HA_OPTION_DELAY_KEY_WRITE);
+      options= (ci->old_options &
+                (HA_OPTION_COMPRESS_RECORD | HA_OPTION_PACK_RECORD |
+                 HA_OPTION_READ_ONLY_DATA | HA_OPTION_CHECKSUM |
+                 HA_OPTION_TMP_TABLE | HA_OPTION_DELAY_KEY_WRITE |
+                 HA_OPTION_LONG_BLOB_PTR | HA_OPTION_PAGE_CHECKSUM));
     else
     {
       /* Uncompressing rows */
-      options=ci->old_options &
-	(HA_OPTION_CHECKSUM | HA_OPTION_TMP_TABLE | HA_OPTION_DELAY_KEY_WRITE);
+      options= (ci->old_options &
+                (HA_OPTION_CHECKSUM | HA_OPTION_TMP_TABLE |
+                 HA_OPTION_DELAY_KEY_WRITE | HA_OPTION_LONG_BLOB_PTR |
+                 HA_OPTION_PAGE_CHECKSUM));
     }
   }
 
@@ -257,31 +260,6 @@ int maria_create(const char *name, enum data_file_type datafile_type,
   else
     min_pack_length+= 5;                        /* Min row overhead */
 
-  if ((packed & 7) == 1)
-  {
-    /*
-      Not optimal packing, try to remove a 1 uchar length zero-field as
-      this will get same record length, but smaller pack overhead
-    */
-    while (column != columndef)
-    {
-      column--;
-      if (column->type == (int) FIELD_SKIP_ZERO && column->length == 1)
-      {
-        /*
-          NOTE1: here we change a field type FIELD_SKIP_ZERO ->
-          FIELD_NORMAL
-        */
-	column->type=(int) FIELD_NORMAL;
-        column->empty_pos= 0;
-        column->empty_bit= 0;
-	packed--;
-	min_pack_length++;
-	break;
-      }
-    }
-  }
-
   if (flags & HA_CREATE_TMP_TABLE)
   {
     options|= HA_OPTION_TMP_TABLE;
@@ -641,7 +619,9 @@ int maria_create(const char *name, enum data_file_type datafile_type,
 
     if (length > max_key_length)
       max_key_length= length;
-    tot_length+= ((max_rows/(ulong) (((uint) maria_block_size-5)/
+    tot_length+= ((max_rows/(ulong) (((uint) maria_block_size -
+                                      MAX_KEYPAGE_HEADER_SIZE -
+                                      KEYPAGE_CHECKSUM_SIZE)/
                                      (length*2))) *
                   maria_block_size);
   }
@@ -652,7 +632,9 @@ int maria_create(const char *name, enum data_file_type datafile_type,
     uniquedef->key=keys+i;
     unique_key_parts+=uniquedef->keysegs;
     share.state.key_root[keys+i]= HA_OFFSET_ERROR;
-    tot_length+= (max_rows/(ulong) (((uint) maria_block_size-5)/
+    tot_length+= (max_rows/(ulong) (((uint) maria_block_size -
+                                     MAX_KEYPAGE_HEADER_SIZE -
+                                     KEYPAGE_CHECKSUM_SIZE) /
                          ((MARIA_UNIQUE_HASH_LENGTH + pointer)*2)))*
                          (ulong) maria_block_size;
   }
@@ -704,12 +686,16 @@ int maria_create(const char *name, enum data_file_type datafile_type,
   share.base.rec_reflength=pointer;
   share.base.block_size= maria_block_size;
 
-  /* Get estimate for index file length (this may be wrong for FT keys) */
+  /*
+    Get estimate for index file length (this may be wrong for FT keys)
+    This is used for pointers to other key pages.
+  */
   tmp= (tot_length + maria_block_size * keys *
 	MARIA_INDEX_BLOCK_MARGIN) / maria_block_size;
+
   /*
     use maximum of key_file_length we calculated and key_file_length value we
-    got from MYI file header (see also mariapack.c:save_state)
+    got from MAI file header (see also mariapack.c:save_state)
   */
   share.base.key_reflength=
     maria_get_pointer_length(max(ci->key_file_length,tmp),3);

storage/maria/ma_delete.c

@@ -71,6 +71,8 @@ int maria_delete(MARIA_HA *info,const uchar *record)
   if (_ma_mark_file_changed(info))
     goto err;
 
+  /* Ensure we don't change the autoincrement value */
+  info->last_auto_increment= ~(ulonglong) 0;
   /* Remove all keys from the index file */
 
   old_key= info->lastkey2;
@@ -212,6 +214,11 @@ int _ma_ck_delete(register MARIA_HA *info, uint keynr, uchar *key,
 
     msg.root= &share->state.key_root[keynr];
     msg.value= new_root;
+    /*
+      set autoincrement to 1 if this is an auto_increment key
+      This is only used if we are now in a rollback of a duplicate key
+    */
+    msg.auto_increment= share->base.auto_key == keynr + 1;
 
     if (translog_write_record(&lsn, log_type,
                               info->trn, info,

storage/maria/ma_key_recover.c

@@ -159,10 +159,6 @@ my_bool write_hook_for_clr_end(enum translog_record_type type
   case LOGREC_UNDO_ROW_INSERT:
     share->state.state.records--;
     share->state.state.checksum+= msg->checksum_delta;
-    /* Restore auto increment if no one has changed it in between */
-    if (share->last_auto_increment == tbl_info->last_auto_increment)
-      share->state.auto_increment= tbl_info->last_auto_increment;
-    break;
     break;
   case LOGREC_UNDO_ROW_UPDATE:
     share->state.state.checksum+= msg->checksum_delta;
@@ -212,7 +208,7 @@ my_bool write_hook_for_undo_key(enum translog_record_type type,
 
 
 /**
-   Upates "auto_increment" and calls the generic UNDO_KEY hook
+   Updates "auto_increment" and calls the generic UNDO_KEY hook
 
    @return Operation status, always 0 (success)
 */
@@ -264,6 +260,32 @@ my_bool write_hook_for_undo_key_insert(enum translog_record_type type,
 }
 
 
+/**
+   @brief Updates "share->auto_increment" in case of abort and calls
+   generic UNDO_KEY hook
+
+   @return Operation status, always 0 (success)
+*/
+
+my_bool write_hook_for_undo_key_delete(enum translog_record_type type,
+                                       TRN *trn, MARIA_HA *tbl_info,
+                                       LSN *lsn, void *hook_arg)
+{
+  struct st_msg_to_write_hook_for_undo_key *msg=
+    (struct st_msg_to_write_hook_for_undo_key *) hook_arg;
+  MARIA_SHARE *share= tbl_info->s;
+  if (msg->auto_increment > 0)                  /* If auto increment key */
+  {
+    /* Restore auto increment if no one has changed it in between */
+    if (share->last_auto_increment == tbl_info->last_auto_increment &&
+        tbl_info->last_auto_increment != ~(ulonglong) 0)
+      share->state.auto_increment= tbl_info->last_auto_increment;
+  }
+  return write_hook_for_undo_key(type, trn, tbl_info, lsn, hook_arg);
+}
+
+
+
 /*****************************************************************************
   Functions for logging of key page changes
 *****************************************************************************/

storage/maria/ma_key_recover.h

@@ -55,6 +55,9 @@ extern my_bool write_hook_for_undo_key(enum translog_record_type type,
 extern my_bool write_hook_for_undo_key_insert(enum translog_record_type type,
                                               TRN *trn, MARIA_HA *tbl_info,
                                               LSN *lsn, void *hook_arg);
+extern my_bool write_hook_for_undo_key_delete(enum translog_record_type type,
+                                              TRN *trn, MARIA_HA *tbl_info,
+                                              LSN *lsn, void *hook_arg);
 void _ma_unpin_all_pages(MARIA_HA *info, LSN undo_lsn);
 
 my_bool _ma_log_prefix(MARIA_HA *info, my_off_t page,

storage/maria/ma_loghandler.c

@@ -543,13 +543,13 @@ static LOG_DESC INIT_LOGREC_UNDO_KEY_INSERT_WITH_ROOT=
 static LOG_DESC INIT_LOGREC_UNDO_KEY_DELETE=
 {LOGRECTYPE_VARIABLE_LENGTH, 0,
  LSN_STORE_SIZE + FILEID_STORE_SIZE + KEY_NR_STORE_SIZE,
- NULL, write_hook_for_undo_key, NULL, 1,
+ NULL, write_hook_for_undo_key_delete, NULL, 1,
  "undo_key_delete", LOGREC_LAST_IN_GROUP, NULL, NULL};
 
 static LOG_DESC INIT_LOGREC_UNDO_KEY_DELETE_WITH_ROOT=
 {LOGRECTYPE_VARIABLE_LENGTH, 0,
  LSN_STORE_SIZE + FILEID_STORE_SIZE + KEY_NR_STORE_SIZE + PAGE_STORE_SIZE,
- NULL, write_hook_for_undo_key, NULL, 1,
+ NULL, write_hook_for_undo_key_delete, NULL, 1,
  "undo_key_delete_with_root", LOGREC_LAST_IN_GROUP, NULL, NULL};
 
 static LOG_DESC INIT_LOGREC_PREPARE=

storage/maria/ma_open.c

@@ -449,7 +449,7 @@ MARIA_HA *maria_open(const char *name, int mode, uint open_flags)
 		   (ulonglong) 1 << (share->base.rec_reflength*8))-1);
 
     max_key_file_length=
-      _ma_safe_mul(MARIA_MIN_KEY_BLOCK_LENGTH,
+      _ma_safe_mul(maria_block_size,
 		  ((ulonglong) 1 << (share->base.key_reflength*8))-1);
 #if SIZEOF_OFF_T == 4
     set_if_smaller(max_data_file_length, INT_MAX32);

storage/maria/ma_page.c

@@ -101,7 +101,7 @@ int _ma_write_keypage(register MARIA_HA *info,
     _ma_get_used_and_nod(share, buff, page_length, nod);
     if (pos < share->base.keystart ||
         pos+block_size > info->state->key_file_length ||
-      (pos & (MARIA_MIN_KEY_BLOCK_LENGTH-1)))
+        (pos & (maria_block_size-1)))
     {
       DBUG_PRINT("error",("Trying to write inside key status region: "
                           "key_start: %lu  length: %lu  page: %lu",
@@ -182,7 +182,7 @@ int _ma_write_keypage(register MARIA_HA *info,
 int _ma_dispose(register MARIA_HA *info, my_off_t pos, my_bool page_not_read)
 {
   my_off_t old_link;
-  uchar buff[MAX_KEYPAGE_HEADER_SIZE+8];
+  uchar buff[MAX_KEYPAGE_HEADER_SIZE+ 8 + 2];
   ulonglong page_no;
   MARIA_SHARE *share= info->s;
   MARIA_PINNED_PAGE page_link;

storage/maria/ma_search.c

@@ -590,11 +590,11 @@ my_off_t _ma_kpos(uint nod_flag, uchar *after_key)
   switch (nod_flag) {
 #if SIZEOF_OFF_T > 4
   case 7:
-    return mi_uint7korr(after_key)*MARIA_MIN_KEY_BLOCK_LENGTH;
+    return mi_uint7korr(after_key)*maria_block_size;
   case 6:
-    return mi_uint6korr(after_key)*MARIA_MIN_KEY_BLOCK_LENGTH;
+    return mi_uint6korr(after_key)*maria_block_size;
   case 5:
-    return mi_uint5korr(after_key)*MARIA_MIN_KEY_BLOCK_LENGTH;
+    return mi_uint5korr(after_key)*maria_block_size;
 #else
   case 7:
     after_key++;
@@ -604,13 +604,13 @@ my_off_t _ma_kpos(uint nod_flag, uchar *after_key)
     after_key++;
 #endif
   case 4:
-    return ((my_off_t) mi_uint4korr(after_key))*MARIA_MIN_KEY_BLOCK_LENGTH;
+    return ((my_off_t) mi_uint4korr(after_key))*maria_block_size;
   case 3:
-    return ((my_off_t) mi_uint3korr(after_key))*MARIA_MIN_KEY_BLOCK_LENGTH;
+    return ((my_off_t) mi_uint3korr(after_key))*maria_block_size;
   case 2:
-    return (my_off_t) (mi_uint2korr(after_key)*MARIA_MIN_KEY_BLOCK_LENGTH);
+    return (my_off_t) (mi_uint2korr(after_key)*maria_block_size);
   case 1:
-    return (uint) (*after_key)*MARIA_MIN_KEY_BLOCK_LENGTH;
+    return (uint) (*after_key)*maria_block_size;
   case 0:                                       /* At leaf page */
   default:                                      /* Impossible */
     return(HA_OFFSET_ERROR);
@@ -622,7 +622,7 @@ my_off_t _ma_kpos(uint nod_flag, uchar *after_key)
 
 void _ma_kpointer(register MARIA_HA *info, register uchar *buff, my_off_t pos)
 {
-  pos/=MARIA_MIN_KEY_BLOCK_LENGTH;
+  pos/=maria_block_size;
   switch (info->s->base.key_reflength) {
 #if SIZEOF_OFF_T > 4
   case 7: mi_int7store(buff,pos); break;

storage/maria/ma_update.c

@@ -76,6 +76,9 @@ int maria_update(register MARIA_HA *info, const uchar *oldrec, uchar *newrec)
     goto err_end;
   }
 
+  /* Ensure we don't try to restore auto_increment if it doesn't change */
+  info->last_auto_increment= ~(ulonglong) 0;
+
   /* Check which keys changed from the original row */
 
   new_key= info->lastkey2;

storage/maria/ma_write.c

@@ -138,6 +138,9 @@ int maria_write(MARIA_HA *info, uchar *record)
       goto err2;
   }
 
+  /* Ensure we don't try to restore auto_increment if it doesn't change */
+  info->last_auto_increment= ~(ulonglong) 0;
+
   if ((info->opt_flag & OPT_NO_ROWS))
     filepos= HA_OFFSET_ERROR;
   else

storage/maria/maria_chk.c

@@ -332,7 +332,7 @@ static struct my_option my_long_options[] =
   { "page_buffer_size", OPT_PAGE_BUFFER_SIZE,
     "Size of page buffer. Used by --safe-repair",
     (uchar**) &check_param.use_buffers, (uchar**) &check_param.use_buffers, 0,
-    GET_ULONG, REQUIRED_ARG, (long) USE_BUFFER_INIT, (long) USE_BUFFER_INIT,
+    GET_ULONG, REQUIRED_ARG, (long) USE_BUFFER_INIT, 1024L*1024L,
     (long) ~0L, (long) MALLOC_OVERHEAD, (long) IO_SIZE, 0},
   { "read_buffer_size", OPT_READ_BUFFER_SIZE, "",
     (uchar**) &check_param.read_buffer_length,
@@ -1466,14 +1466,14 @@ static void descript(HA_CHECK *param, register MARIA_HA *info, char *name)
       pos=strmov(pos,null_txt);
     *pos=0;
 
-    printf("%-4d%-6ld%-3d %-8s%-21s",
+    printf("%-4d%-6ld%-3d %-8s%-23s",
 	   key+1,(long) keyseg->start+1,keyseg->length,text,buff);
     if (share->state.key_root[key] != HA_OFFSET_ERROR)
       llstr(share->state.key_root[key],buff);
     else
       buff[0]=0;
     if (param->testflag & T_VERBOSE)
-      printf("%11.0f %12s %10d",
+      printf("%9.0f %12s %10d",
 	     share->state.rec_per_key_part[keyseg_nr++],
 	     buff,keyinfo->block_length);
     VOID(putchar('\n'));

storage/maria/maria_def.h

@@ -65,7 +65,7 @@ typedef struct st_maria_status_info
 typedef struct st_maria_state_info
 {
   struct
-  {					/* Fileheader */
+  {					/* Fileheader (24 bytes) */
     uchar file_version[4];
     uchar options[2];
     uchar header_length[2];
@@ -285,6 +285,10 @@ typedef struct st_maria_share
   uchar *file_map;			/* mem-map of file if possible */
   PAGECACHE *pagecache;			/* ref to the current key cache */
   MARIA_DECODE_TREE *decode_trees;
+  /*
+    Previous auto-increment value. Used to verify if we can restore the
+    auto-increment counter if we have to abort an insert (duplicate key).
+  */
   ulonglong last_auto_increment;
   uint16 *decode_tables;
   uint16 id; /**< 2-byte id by which log records refer to the table */
@@ -485,7 +489,7 @@ struct st_maria_handler
   uint32 int_keytree_version;		/* -""- */
   int (*read_record)(MARIA_HA *, uchar*, MARIA_RECORD_POS);
   invalidator_by_filename invalidator;	/* query cache invalidator */
-  ulonglong last_auto_increment;
+  ulonglong last_auto_increment;  	/* auto value at start of statement */
   ulong this_unique;			/* uniq filenumber or thread */
   ulong last_unique;			/* last unique number */
   ulong this_loop;			/* counter for this open */