diff options
Diffstat (limited to 'storage/xtradb/include/page0page.ic')
-rw-r--r-- | storage/xtradb/include/page0page.ic | 38 |
1 files changed, 34 insertions, 4 deletions
diff --git a/storage/xtradb/include/page0page.ic b/storage/xtradb/include/page0page.ic index d8570108115..4fe93345ce5 100644 --- a/storage/xtradb/include/page0page.ic +++ b/storage/xtradb/include/page0page.ic @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1994, 2009, Innobase Oy. All Rights Reserved. +Copyright (c) 1994, 2012, Oracle and/or its affiliates. All Rights Reserved. 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 @@ -11,8 +11,8 @@ 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., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -422,7 +422,37 @@ page_rec_is_infimum( return(page_rec_is_infimum_low(page_offset(rec))); } +/************************************************************//** +Returns the nth record of the record list. +This is the inverse function of page_rec_get_n_recs_before(). +@return nth record */ +UNIV_INLINE +rec_t* +page_rec_get_nth( +/*=============*/ + page_t* page, /*!< in: page */ + ulint nth) /*!< in: nth record */ +{ + return((rec_t*) page_rec_get_nth_const(page, nth)); +} + #ifndef UNIV_HOTBACKUP +/************************************************************//** +Returns the middle record of the records on the page. If there is an +even number of records in the list, returns the first record of the +upper half-list. +@return middle record */ +UNIV_INLINE +rec_t* +page_get_middle_rec( +/*================*/ + page_t* page) /*!< in: page */ +{ + ulint middle = (page_get_n_recs(page) + PAGE_HEAP_NO_USER_LOW) / 2; + + return(page_rec_get_nth(page, middle)); +} + /*************************************************************//** Compares a data tuple to a physical record. Differs from the function cmp_dtuple_rec_with_match in the way that the record must reside on an @@ -713,7 +743,7 @@ page_rec_get_next_low( (void*) rec, (ulong) page_get_space_id(page), (ulong) page_get_page_no(page)); - buf_page_print(page, 0); + buf_page_print(page, 0, 0); ut_error; } |