Cleanup

Docs/manual.texi:
  Update information about IS NULL.
myisam/myisamchk.c:
  Portability fix
sql/mysqld.cc:
  Changed log_long_queries -> log_slow_queries

Docs/manual.texi

@@ -29836,6 +29836,32 @@ mysql> select 1 IS NOT NULL, 0 IS NOT NULL, NULL IS NOT NULL;
         -> 1 1 0
 @end example
 
+@cindex ODBC compatibility
+@cindex compatibility, with ODBC
+To be able to work good with other programs, MySQL supports the following
+extra features when using @code{IS NULL}:
+
+@itemize @bullet
+@item
+You can find the last inserted row with:
+
+@example
+SELECT * FROM tbl_name WHERE auto_col IS NULL
+@end example
+
+This can be disabled by setting @code{SQL_AUTO_IS_NULL=0}. @xref{SET OPTION}.
+@item
+For @code{NOT NULL} @code{DATE} and @code{DATETIME} columns you can find
+the special date @code{0000-00-00} by using:
+
+@example
+SELECT * FROM tbl_name WHERE date_column IS NULL
+@end example
+
+This is needed to get some ODBC applications to work (as ODBC doesn't
+support a @code{0000-00-00} date)
+@end itemize
+
 @findex BETWEEN ... AND
 @item expr BETWEEN min AND max
 If @code{expr} is greater than or equal to @code{min} and @code{expr} is
@@ -48435,8 +48461,8 @@ Fixed bug in multi table delete.
 @item
 Fixed bug in @code{SELECT CONCAT(argument-list) ... GROUP BY 1}.
 @item
-@code{SELECT ... INSERT} did a full rollback in case of an error. Fixed
-so that we only roll back the last statement.
+@code{INSERT ... SELECT} did a full rollback in case of an error. Fixed
+so that we only roll back the last statement in the current transaction.
 @item
 Fixed bug with empty expression for boolean fulltext search.
 @item

myisam/myisamchk.c

@@ -575,9 +575,13 @@ get_one_option(int optid,
     break;
   case '#':
     if (argument && *argument == '0')
+    {
       DBUG_POP();
+    }
     else
+    {
       DBUG_PUSH(argument ? argument : "d:t:o,/tmp/myisamchk.trace");
+    }
     break;
   case 'V':
     print_version();

sql/mysqld.cc

@@ -3068,7 +3068,7 @@ struct show_var_st init_vars[]= {
   {"log_update",              (char*) &opt_update_log,              SHOW_BOOL},
   {"log_bin",                 (char*) &opt_bin_log,                 SHOW_BOOL},
   {"log_slave_updates",       (char*) &opt_log_slave_updates,       SHOW_BOOL},
-  {"log_long_queries",        (char*) &opt_slow_log,                SHOW_BOOL},
+  {"log_slow_queries",        (char*) &opt_slow_log,                SHOW_BOOL},
   {"long_query_time",         (char*) &long_query_time,             SHOW_LONG},
   {"low_priority_updates",    (char*) &low_priority_updates,        SHOW_BOOL},
   {"lower_case_table_names",  (char*) &lower_case_table_names,      SHOW_LONG},