diff options
Diffstat (limited to 'innobase/include/btr0cur.h')
| -rw-r--r-- | innobase/include/btr0cur.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/innobase/include/btr0cur.h b/innobase/include/btr0cur.h index 1d17c0e952d..506877333c3 100644 --- a/innobase/include/btr0cur.h +++ b/innobase/include/btr0cur.h @@ -690,7 +690,13 @@ and sleep this many microseconds in between */ #define BTR_CUR_RETRY_DELETE_N_TIMES 100 #define BTR_CUR_RETRY_SLEEP_TIME 50000 -/* The reference in a field of which data is stored on a different page */ +/* The reference in a field for which data is stored on a different page. +The reference is at the end of the 'locally' stored part of the field. +'Locally' means storage in the index record. +We store locally a long enough prefix of each column so that we can determine +the ordering parts of each index record without looking into the externally +stored part. */ + /*--------------------------------------*/ #define BTR_EXTERN_SPACE_ID 0 /* space id where stored */ #define BTR_EXTERN_PAGE_NO 4 /* page no where stored */ |