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Diffstat (limited to 'src/backend/access/heap')
| -rw-r--r-- | src/backend/access/heap/README.HOT | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/backend/access/heap/README.HOT b/src/backend/access/heap/README.HOT index 76ac83722f5..f1a1d9252c7 100644 --- a/src/backend/access/heap/README.HOT +++ b/src/backend/access/heap/README.HOT @@ -401,6 +401,12 @@ from the index, as well as ensuring that no one can see any inconsistent rows in a broken HOT chain (the first condition is stronger than the second). Finally, we can mark the index valid for searches. +Note that we do not need to set pg_index.indcheckxmin in this code path, +because we have outwaited any transactions that would need to avoid using +the index. (indcheckxmin is only needed because non-concurrent CREATE +INDEX doesn't want to wait; its stronger lock would create too much risk of +deadlock if it did.) + Limitations and Restrictions ---------------------------- |