diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/access/heap/README.tuplock | 7 | ||||
| -rw-r--r-- | src/backend/access/heap/hio.c | 8 |
2 files changed, 7 insertions, 8 deletions
diff --git a/src/backend/access/heap/README.tuplock b/src/backend/access/heap/README.tuplock index d03ddf6cdcc..6441e8baf0e 100644 --- a/src/backend/access/heap/README.tuplock +++ b/src/backend/access/heap/README.tuplock @@ -146,9 +146,10 @@ The following infomask bits are applicable: FOR UPDATE; this is implemented by the HEAP_KEYS_UPDATED bit. - HEAP_KEYS_UPDATED - This bit lives in t_infomask2. If set, indicates that the XMAX updated - this tuple and changed the key values, or it deleted the tuple. - It's set regardless of whether the XMAX is a TransactionId or a MultiXactId. + This bit lives in t_infomask2. If set, indicates that the operation(s) done + by the XMAX compromise the tuple key, such as a SELECT FOR UPDATE, an UPDATE + that modifies the columns of the key, or a DELETE. It's set regardless of + whether the XMAX is a TransactionId or a MultiXactId. We currently never set the HEAP_XMAX_COMMITTED when the HEAP_XMAX_IS_MULTI bit is set. diff --git a/src/backend/access/heap/hio.c b/src/backend/access/heap/hio.c index fb7ad0bab47..75223c9beaf 100644 --- a/src/backend/access/heap/hio.c +++ b/src/backend/access/heap/hio.c @@ -49,12 +49,10 @@ RelationPutHeapTuple(Relation relation, /* * Do not allow tuples with invalid combinations of hint bits to be placed - * on a page. These combinations are detected as corruption by the - * contrib/amcheck logic, so if you disable one or both of these - * assertions, make corresponding changes there. + * on a page. This combination is detected as corruption by the + * contrib/amcheck logic, so if you disable this assertion, make + * corresponding changes there. */ - Assert(!((tuple->t_data->t_infomask & HEAP_XMAX_LOCK_ONLY) && - (tuple->t_data->t_infomask2 & HEAP_KEYS_UPDATED))); Assert(!((tuple->t_data->t_infomask & HEAP_XMAX_COMMITTED) && (tuple->t_data->t_infomask & HEAP_XMAX_IS_MULTI))); |