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Diffstat (limited to 'src/backend/commands/cluster.c')
| -rw-r--r-- | src/backend/commands/cluster.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/backend/commands/cluster.c b/src/backend/commands/cluster.c index 9a7649bb4f9..670d29ea831 100644 --- a/src/backend/commands/cluster.c +++ b/src/backend/commands/cluster.c @@ -797,6 +797,10 @@ copy_heap_data(Oid OIDNewHeap, Oid OIDOldHeap, Oid OIDOldIndex, * When doing swap by content, any toast pointers written into NewHeap * must use the old toast table's OID, because that's where the toast * data will eventually be found. Set this up by setting rd_toastoid. + * This also tells tuptoaster.c to preserve the toast value OIDs, + * which we want so as not to invalidate toast pointers in system + * catalog caches. + * * Note that we must hold NewHeap open until we are done writing data, * since the relcache will not guarantee to remember this setting once * the relation is closed. Also, this technique depends on the fact |