diff options
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/utils/portal.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/include/utils/portal.h b/src/include/utils/portal.h index 7250c9c1bb3..c1d93a96bb4 100644 --- a/src/include/utils/portal.h +++ b/src/include/utils/portal.h @@ -163,6 +163,16 @@ typedef struct PortalData MemoryContext holdContext; /* memory containing holdStore */ /* + * Snapshot under which tuples in the holdStore were read. We must keep a + * reference to this snapshot if there is any possibility that the tuples + * contain TOAST references, because releasing the snapshot could allow + * recently-dead rows to be vacuumed away, along with any toast data + * belonging to them. In the case of a held cursor, we avoid needing to + * keep such a snapshot by forcibly detoasting the data. + */ + Snapshot holdSnapshot; /* registered snapshot, or NULL if none */ + + /* * atStart, atEnd and portalPos indicate the current cursor position. * portalPos is zero before the first row, N after fetching N'th row of * query. After we run off the end, portalPos = # of rows in query, and |