diff options
Diffstat (limited to 'src/include/access/htup_details.h')
| -rw-r--r-- | src/include/access/htup_details.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/src/include/access/htup_details.h b/src/include/access/htup_details.h index cebaea097d1..cf56d4ace43 100644 --- a/src/include/access/htup_details.h +++ b/src/include/access/htup_details.h @@ -83,8 +83,10 @@ * * A word about t_ctid: whenever a new tuple is stored on disk, its t_ctid * is initialized with its own TID (location). If the tuple is ever updated, - * its t_ctid is changed to point to the replacement version of the tuple. - * Thus, a tuple is the latest version of its row iff XMAX is invalid or + * its t_ctid is changed to point to the replacement version of the tuple or + * the block number (ip_blkid) is invalidated if the tuple is moved from one + * partition to another partition relation due to an update of the partition + * key. Thus, a tuple is the latest version of its row iff XMAX is invalid or * t_ctid points to itself (in which case, if XMAX is valid, the tuple is * either locked or deleted). One can follow the chain of t_ctid links * to find the newest version of the row. Beware however that VACUUM might @@ -445,6 +447,12 @@ do { \ ItemPointerSet(&(tup)->t_ctid, token, SpecTokenOffsetNumber) \ ) +#define HeapTupleHeaderSetMovedPartitions(tup) \ + ItemPointerSetMovedPartitions(&(tup)->t_ctid) + +#define HeapTupleHeaderIndicatesMovedPartitions(tup) \ + ItemPointerIndicatesMovedPartitions(&tup->t_ctid) + #define HeapTupleHeaderGetDatumLength(tup) \ VARSIZE(tup) |