Adding upstream version 1:10.11.6.upstream/1%10.11.6upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 165 insertions, 0 deletions

diff --git a/storage/maria/ma_rename.c b/storage/maria/ma_rename.c
new file mode 100644
index 00000000..ade6e52f
--- /dev/null
+++ b/storage/maria/ma_rename.c
@@ -0,0 +1,165 @@
+/* Copyright (C) 2006 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
+
+/*
+  Rename a table
+*/
+
+#include "ma_fulltext.h"
+#include "trnman_public.h"
+
+/**
+   @brief renames a table
+
+   @param  old_name        current name of table
+   @param  new_name        table should be renamed to this name
+
+   @return Operation status
+     @retval 0      OK
+     @retval !=0    Error
+*/
+
+int maria_rename(const char *old_name, const char *new_name)
+{
+  char from[FN_REFLEN],to[FN_REFLEN];
+  int data_file_rename_error= 0, index_file_rename_error= 0;
+#ifdef USE_RAID
+  uint raid_type=0,raid_chunks=0;
+#endif
+  MARIA_HA *info;
+  MARIA_SHARE *share;
+  myf sync_dir= 0;
+  my_bool ddl_recovery= 0;
+  DBUG_ENTER("maria_rename");
+
+#ifdef EXTRA_DEBUG
+  _ma_check_table_is_closed(old_name,"rename old_table");
+  _ma_check_table_is_closed(new_name,"rename new table2");
+#endif
+  /** @todo LOCK take X-lock on table */
+  if (!(info= maria_open(old_name, O_RDWR, HA_OPEN_FOR_REPAIR, 0)))
+  {
+    int error= my_errno;
+    /*
+      Check if we are in recovery from a rename that failed in the middle
+      and we are now renaming things back.
+    */
+    if (error == ENOENT)
+    {
+      char *index_file= from;
+      char *data_file= to;
+      fn_format(index_file, old_name, "", MARIA_NAME_IEXT,
+                MY_UNPACK_FILENAME | MY_APPEND_EXT);
+      fn_format(data_file, old_name, "", MARIA_NAME_DEXT,
+                MY_UNPACK_FILENAME | MY_APPEND_EXT);
+      if (!access(data_file, F_OK) && access(index_file, F_OK))
+      {
+        ddl_recovery= 1;
+        goto forced_rename;
+      }
+    }
+    DBUG_RETURN(error);
+  }
+  share= info->s;
+#ifdef USE_RAID
+  raid_type =      share->base.raid_type;
+  raid_chunks =    share->base.raid_chunks;
+#endif
+
+  /*
+    the renaming of an internal table to the final table (like in ALTER TABLE)
+    is the moment when this table receives its correct create_rename_lsn and
+    this is important; make sure transactionality has been re-enabled.
+  */
+  DBUG_ASSERT(share->now_transactional == share->base.born_transactional);
+  if (share->now_transactional && !share->temporary && !maria_in_recovery)
+  {
+    LSN lsn;
+    LEX_CUSTRING log_array[TRANSLOG_INTERNAL_PARTS + 2];
+    size_t old_name_len= strlen(old_name)+1, new_name_len= strlen(new_name)+1;
+    sync_dir= MY_SYNC_DIR;
+    log_array[TRANSLOG_INTERNAL_PARTS + 0].str= (uchar*)old_name;
+    log_array[TRANSLOG_INTERNAL_PARTS + 0].length= old_name_len;
+    log_array[TRANSLOG_INTERNAL_PARTS + 1].str= (uchar*)new_name;
+    log_array[TRANSLOG_INTERNAL_PARTS + 1].length= new_name_len;
+    /*
+      For this record to be of any use for Recovery, we need the upper
+      MySQL layer to be crash-safe, which it is not now (that would require
+      work using the ddl_log of sql/sql_table.cc); when it is, we should
+      reconsider the moment of writing this log record (before or after op,
+      under THR_LOCK_maria or not...), how to use it in Recovery.
+      For now it can serve to apply logs to a backup so we sync it.
+    */
+    if (unlikely(translog_write_record(&lsn, LOGREC_REDO_RENAME_TABLE,
+                                       &dummy_transaction_object, NULL,
+                                       (translog_size_t)(old_name_len + new_name_len),
+                                       sizeof(log_array)/sizeof(log_array[0]),
+                                       log_array, NULL, NULL) ||
+                 translog_flush(lsn)))
+    {
+      maria_close(info);
+      DBUG_RETURN(1);
+    }
+    /*
+      store LSN into file, needed for Recovery to not be confused if a
+      RENAME happened (applying REDOs to the wrong table).
+    */
+    if (_ma_update_state_lsns(share, lsn, share->state.create_trid, TRUE,
+                              TRUE))
+    {
+      maria_close(info);
+      DBUG_RETURN(1);
+    }
+  }
+
+  _ma_reset_state(info);
+  maria_close(info);
+
+forced_rename:
+  /*
+    This code is written so that it should be possible to re-run a
+    failed rename (even if there is a server crash in between the
+    renames) and complete it.
+  */
+  fn_format(from,old_name,"",MARIA_NAME_IEXT,MY_UNPACK_FILENAME|MY_APPEND_EXT);
+  fn_format(to,new_name,"",MARIA_NAME_IEXT,MY_UNPACK_FILENAME|MY_APPEND_EXT);
+  if (mysql_file_rename_with_symlink(key_file_kfile, from, to,
+                                     MYF(MY_WME | sync_dir)))
+    index_file_rename_error= my_errno;
+  fn_format(from,old_name,"",MARIA_NAME_DEXT,MY_UNPACK_FILENAME|MY_APPEND_EXT);
+  fn_format(to,new_name,"",MARIA_NAME_DEXT,MY_UNPACK_FILENAME|MY_APPEND_EXT);
+  if (mysql_file_rename_with_symlink(key_file_dfile, from, to,
+                                     MYF(MY_WME | sync_dir)))
+    data_file_rename_error= my_errno;
+  if (data_file_rename_error && data_file_rename_error != ENOENT &&
+      !ddl_recovery)
+  {
+    /*
+      Now we have a renamed index file and a non-renamed data file, try to
+      undo a successful rename of the index file.
+    */
+    if (!index_file_rename_error)
+    {
+      fn_format(from, old_name, "", MARIA_NAME_IEXT,
+                MYF(MY_UNPACK_FILENAME|MY_APPEND_EXT));
+      fn_format(to, new_name, "", MARIA_NAME_IEXT,
+                MYF(MY_UNPACK_FILENAME|MY_APPEND_EXT));
+      mysql_file_rename_with_symlink(key_file_kfile, to, from,
+                                   MYF(MY_WME | sync_dir));
+    }
+  }
+  DBUG_RETURN(data_file_rename_error ? data_file_rename_error:
+              index_file_rename_error);
+}