diff options
Diffstat (limited to 'src/include/access/nbtree.h')
| -rw-r--r-- | src/include/access/nbtree.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/include/access/nbtree.h b/src/include/access/nbtree.h index fbc8134cfdb..6c1acd4855f 100644 --- a/src/include/access/nbtree.h +++ b/src/include/access/nbtree.h @@ -435,6 +435,15 @@ typedef BTStackData *BTStack; * indexes whose version is >= version 4. It's convenient to keep this close * by, rather than accessing the metapage repeatedly. * + * anynullkeys indicates if any of the keys had NULL value when scankey was + * built from index tuple (note that already-truncated tuple key attributes + * set NULL as a placeholder key value, which also affects value of + * anynullkeys). This is a convenience for unique index non-pivot tuple + * insertion, which usually temporarily unsets scantid, but shouldn't iff + * anynullkeys is true. Value generally matches non-pivot tuple's HasNulls + * bit, but may not when inserting into an INCLUDE index (tuple header value + * is affected by the NULL-ness of both key and non-key attributes). + * * When nextkey is false (the usual case), _bt_search and _bt_binsrch will * locate the first item >= scankey. When nextkey is true, they will locate * the first item > scan key. @@ -461,6 +470,7 @@ typedef BTStackData *BTStack; typedef struct BTScanInsertData { bool heapkeyspace; + bool anynullkeys; bool nextkey; bool pivotsearch; ItemPointer scantid; /* tiebreaker for scankeys */ |