Adding upstream version 1:10.5.12.upstream/1%10.5.12upstream

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

1 files changed, 241 insertions, 0 deletions

diff --git a/storage/myisam/mi_update.c b/storage/myisam/mi_update.c
new file mode 100644
index 00000000..68d76790
--- /dev/null
+++ b/storage/myisam/mi_update.c
@@ -0,0 +1,241 @@
+/*
+   Copyright (c) 2000, 2011, Oracle and/or its affiliates
+
+   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 St, Fifth Floor, Boston, MA 02110-1335  USA */
+
+/* Update an old row in a MyISAM table */
+
+#include "fulltext.h"
+#include "rt_index.h"
+
+int mi_update(register MI_INFO *info, const uchar *oldrec,
+              const uchar *newrec)
+{
+  int flag,key_changed,save_errno;
+  reg3 my_off_t pos;
+  uint i;
+  uchar old_key[HA_MAX_KEY_BUFF],*new_key;
+  my_bool auto_key_changed=0;
+  ulonglong changed;
+  MYISAM_SHARE *share=info->s;
+  ha_checksum UNINIT_VAR(old_checksum);
+  DBUG_ENTER("mi_update");
+
+  DBUG_EXECUTE_IF("myisam_pretend_crashed_table_on_usage",
+                  mi_print_error(info->s, HA_ERR_CRASHED);
+                  DBUG_RETURN(my_errno= HA_ERR_CRASHED););
+  if (!(info->update & HA_STATE_AKTIV))
+  {
+    DBUG_RETURN(my_errno=HA_ERR_KEY_NOT_FOUND);
+  }
+  if (share->options & HA_OPTION_READ_ONLY_DATA)
+  {
+    DBUG_RETURN(my_errno=EACCES);
+  }
+  if (info->state->key_file_length >= share->base.margin_key_file_length)
+  {
+    DBUG_RETURN(my_errno=HA_ERR_INDEX_FILE_FULL);
+  }
+  pos=info->lastpos;
+  if (_mi_readinfo(info,F_WRLCK,1))
+    DBUG_RETURN(my_errno);
+
+  if (share->calc_checksum)
+    old_checksum=info->checksum=(*share->calc_checksum)(info,oldrec);
+  if ((*share->compare_record)(info,oldrec))
+  {
+    save_errno=my_errno;
+    goto err_end;			/* Record has changed */
+  }
+
+
+  /* Calculate and check all unique constraints */
+  key_changed=0;
+  for (i=0 ; i < share->state.header.uniques ; i++)
+  {
+    MI_UNIQUEDEF *def=share->uniqueinfo+i;
+    if (mi_unique_comp(def, newrec, oldrec,1) &&
+	mi_check_unique(info, def, newrec, mi_unique_hash(def, newrec),
+			info->lastpos))
+    {
+      save_errno=my_errno;
+      goto err_end;
+    }
+  }
+  if (_mi_mark_file_changed(info))
+  {
+    save_errno=my_errno;
+    goto err_end;
+  }
+
+  /* Check which keys changed from the original row */
+
+  new_key=info->lastkey2;
+  changed=0;
+  for (i=0 ; i < share->base.keys ; i++)
+  {
+    if (mi_is_key_active(share->state.key_map, i))
+    {
+      if (share->keyinfo[i].flag & HA_FULLTEXT )
+      {
+	if (_mi_ft_cmp(info,i,oldrec, newrec))
+	{
+	  if ((int) i == info->lastinx)
+	  {
+	  /*
+	    We are changeing the index we are reading on.  Mark that
+	    the index data has changed and we need to do a full search
+	    when doing read-next
+	  */
+	    key_changed|=HA_STATE_WRITTEN;
+	  }
+	  changed|=((ulonglong) 1 << i);
+	  if (_mi_ft_update(info,i, old_key,oldrec,newrec,pos))
+	    goto err;
+	}
+      }
+      else
+      {
+	uint new_length=_mi_make_key(info,i,new_key,newrec,pos);
+	uint old_length=_mi_make_key(info,i,old_key,oldrec,pos);
+
+        /* The above changed info->lastkey2. Inform mi_rnext_same(). */
+        info->update&= ~HA_STATE_RNEXT_SAME;
+
+	if (new_length != old_length ||
+	    memcmp((uchar*) old_key,(uchar*) new_key,new_length))
+	{
+	  if ((int) i == info->lastinx)
+	    key_changed|=HA_STATE_WRITTEN;	/* Mark that keyfile changed */
+	  changed|=((ulonglong) 1 << i);
+	  share->keyinfo[i].version++;
+	  if (share->keyinfo[i].ck_delete(info,i,old_key,old_length)) goto err;
+	  if (share->keyinfo[i].ck_insert(info,i,new_key,new_length)) goto err;
+	  if (share->base.auto_key == i+1)
+	    auto_key_changed=1;
+	}
+      }
+    }
+  }
+  /*
+    If we are running with external locking, we must update the index file
+    that something has changed.
+  */
+  if (changed || !my_disable_locking)
+    key_changed|= HA_STATE_CHANGED;
+
+  if (share->calc_checksum)
+  {
+    info->checksum=(*share->calc_checksum)(info,newrec);
+    /* Store new checksum in index file header */
+    key_changed|= HA_STATE_CHANGED;
+  }
+  {
+    /*
+      Don't update index file if data file is not extended and no status
+      information changed
+    */
+    MI_STATUS_INFO state;
+    ha_rows org_split;
+    my_off_t org_delete_link;
+
+    memcpy((char*) &state, (char*) info->state, sizeof(state));
+    org_split=	     share->state.split;
+    org_delete_link= share->state.dellink;
+    if ((*share->update_record)(info,pos,newrec))
+      goto err;
+    if (!key_changed &&
+	(memcmp((char*) &state, (char*) info->state, sizeof(state)) ||
+	 org_split != share->state.split ||
+	 org_delete_link != share->state.dellink))
+      key_changed|= HA_STATE_CHANGED;		/* Must update index file */
+  }
+  if (auto_key_changed)
+    set_if_bigger(info->s->state.auto_increment,
+                  retrieve_auto_increment(info, newrec));
+  if (share->calc_checksum)
+    info->state->checksum+=(info->checksum - old_checksum);
+
+  info->update= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED | HA_STATE_AKTIV |
+		 key_changed);
+  myisam_log_record(MI_LOG_UPDATE,info,newrec,info->lastpos,0);
+  /*
+    Every myisam function that updates myisam table must end with
+    call to _mi_writeinfo(). If operation (second param of
+    _mi_writeinfo()) is not 0 it sets share->changed to 1, that is
+    flags that data has changed. If operation is 0, this function
+    equals to no-op in this case.
+
+    mi_update() must always pass !0 value as operation, since even if
+    there is no index change there could be data change.
+  */
+  (void) _mi_writeinfo(info, WRITEINFO_UPDATE_KEYFILE);
+  if (info->invalidator != 0)
+  {
+    DBUG_PRINT("info", ("invalidator... '%s' (update)", info->filename));
+    (*info->invalidator)(info->filename);
+    info->invalidator=0;
+  }
+  DBUG_RETURN(0);
+
+err:
+  DBUG_PRINT("error",("key: %d  errno: %d",i,my_errno));
+  save_errno=my_errno;
+  if (changed)
+    key_changed|= HA_STATE_CHANGED;
+  if (my_errno == HA_ERR_FOUND_DUPP_KEY || my_errno == HA_ERR_RECORD_FILE_FULL ||
+      my_errno == HA_ERR_NULL_IN_SPATIAL || my_errno == HA_ERR_OUT_OF_MEM)
+  {
+    info->errkey= (int) i;
+    flag=0;
+    do
+    {
+      if (((ulonglong) 1 << i) & changed)
+      {
+	if (share->keyinfo[i].flag & HA_FULLTEXT)
+	{
+	  if ((flag++ && _mi_ft_del(info,i, new_key,newrec,pos)) ||
+	      _mi_ft_add(info,i, old_key,oldrec,pos))
+	    break;
+	}
+	else
+	{
+	  uint new_length=_mi_make_key(info,i,new_key,newrec,pos);
+	  uint old_length= _mi_make_key(info,i,old_key,oldrec,pos);
+	  if ((flag++ && 
+	       share->keyinfo[i].ck_delete(info, i, new_key, new_length)) ||
+	      share->keyinfo[i].ck_insert(info, i, old_key, old_length))
+	    break;
+	}
+      }
+    } while (i-- != 0);
+  }
+  else
+  {
+    mi_print_error(info->s, HA_ERR_CRASHED);
+    mi_mark_crashed(info);
+  }
+  info->update= (HA_STATE_CHANGED | HA_STATE_AKTIV | HA_STATE_ROW_CHANGED |
+		 key_changed);
+
+ err_end:
+  myisam_log_record(MI_LOG_UPDATE,info,newrec,info->lastpos,my_errno);
+  (void) _mi_writeinfo(info,WRITEINFO_UPDATE_KEYFILE);
+  if (save_errno == HA_ERR_KEY_NOT_FOUND)
+  {
+    mi_print_error(info->s, HA_ERR_CRASHED);
+    save_errno=HA_ERR_CRASHED;
+  }
+  DBUG_RETURN(my_errno=save_errno);
+} /* mi_update */