diff options
Diffstat (limited to 'storage/innobase/include/page0page.h')
| -rw-r--r-- | storage/innobase/include/page0page.h | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/storage/innobase/include/page0page.h b/storage/innobase/include/page0page.h index 273007c2778..24698557e77 100644 --- a/storage/innobase/include/page0page.h +++ b/storage/innobase/include/page0page.h @@ -234,11 +234,22 @@ page_get_supremum_rec( /*==================*/ /* out: the last record in record list */ page_t* page); /* in: page which must have record(s) */ -/**************************************************************** -Returns the middle record of record list. If there are an even number -of records in the list, returns the first record of upper half-list. */ +/************************************************************//** +Returns the nth record of the record list. +This is the inverse function of page_rec_get_n_recs_before(). */ rec_t* +page_rec_get_nth( +/*=============*/ + /* out: nth record */ + page_t* page, /* in: page */ + ulint nth); /* in: nth record */ +/***************************************************************** +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. */ +UNIV_INLINE +rec_t* page_get_middle_rec( /*================*/ /* out: middle record */ @@ -280,7 +291,8 @@ page_get_n_recs( page_t* page); /* in: index page */ /******************************************************************* Returns the number of records before the given record in chain. -The number includes infimum and supremum records. */ +The number includes infimum and supremum records. +This is the inverse function of page_rec_get_nth(). */ ulint page_rec_get_n_recs_before( |