Updated changelog of 3.23.48 with InnoDB changes.

sql/sql_table.cc:
  Fixed comment

Docs/manual.texi

@@ -46833,7 +46833,7 @@ users use this code as the rest of the code and because of this we are
 not yet 100% confident in this code.
 
 @menu
-* News-3.23.49::                
+* News-3.23.49::                Changes in release 3.23.49
 * News-3.23.48::                Changes in release 3.23.48
 * News-3.23.47::                Changes in release 3.23.47
 * News-3.23.46::                Changes in release 3.23.46
@@ -46908,10 +46908,41 @@ Some InnoDB variables was always shown in @code{SHOW VARIABLES} as
 @code{OFF} on high-byte-first systems (like sparc).
 @item
 Fixed problem with one thread using an InnoDB table and another
-thread doing an @code{ALTER TABLE} on the same table.
+thread doing an @code{ALTER TABLE} on the same table. Before that,
+mysqld could crash with an assertion failure in row0row.c, line 474.
 @item
-If inserts to several tables containing an auto-inc column are wrapped
-inside one @code{LOCK TABLES}, InnoDB asserted in @code{lock0lock.c}.
+Tuned the InnoDB SQL optimizer to favor more often index searches
+over table scans.
+@item
+Fixed a performance problem with InnoDB tables when several large SELECT
+queries are run concurrently on a multiprocessor Linux computer.  Large
+CPU-bound SELECT queries will now also generally run faster on all
+platforms.
+@item
+If MySQL binlogging is used, InnoDB now prints after crash recovery the
+latest MySQL binlog name and the offset InnoDB was able to recover
+to. This is useful, for example, when resynchronizing a master and a
+slave database in replication.
+@item
+Added better error messages to help in installation problems of InnoDB tables.
+@item
+One can now recover also MySQL temporary tables which have become
+orphaned inside the InnoDB tablespace.
+@item
+InnoDB now prevents a @code{FOREIGN KEY} declaration where the signedness
+is not the same in the referencing and referenced integer columns.
+@item
+Calling @code{SHOW CREATE TABLE} or @code{SHOW TABLE STATUS} could cause
+memory corruption and make mysqld to crash.  Especially at risk was
+@code{mysqldump}, because it calls frequently @code{SHOW CREATE TABLE}.
+@item
+If inserts to several tables containing an auto-inc column were wrapped
+inside one @code{LOCK TABLES}, InnoDB asserted in lock0lock.c.
+@item
+In 3.23.47 we allowed several @code{NULLS} in a @code{UNIQUE} secondary
+index for an InnoDB table.  But @code{CHECK TABLE} was not relaxed: it
+reports the table as corrupt.  @code{CHECK TABLE} no longer complains in
+this situation.
 @item
 @code{SHOW GRANTS} now shows @code{REFERENCES} instead of @code{REFERENCE}.
 @end itemize

sql/sql_table.cc

@@ -1574,8 +1574,8 @@ int mysql_alter_table(THD *thd,char *new_db, char *new_name,
 #endif
   {
     /*
-      Win32 and InnoDB can't rename an open table, so we must close
-      the original table at before doing the rename
+      Win32 and InnoDB can't drop a table that is in use, so we must
+      close all the original table at before doing the rename
     */
     table_name=thd->strdup(table_name);		// must be saved
     if (close_cached_table(thd,table))