upstream/postgresql
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2026-02-26 03:11:02 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions
postgresql/src/include/access
History
Kevin Grittner 848ef42bb8 Add the "snapshot too old" feature 
This feature is controlled by a new old_snapshot_threshold GUC.  A
value of -1 disables the feature, and that is the default.  The
value of 0 is just intended for testing.  Above that it is the
number of minutes a snapshot can reach before pruning and vacuum
are allowed to remove dead tuples which the snapshot would
otherwise protect.  The xmin associated with a transaction ID does
still protect dead tuples.  A connection which is using an "old"
snapshot does not get an error unless it accesses a page modified
recently enough that it might not be able to produce accurate
results.

This is similar to the Oracle feature, and we use the same SQLSTATE
and error message for compatibility.
2016-04-08 14:36:30 -05:00
..
amapi.h Revert CREATE INDEX ... INCLUDING ... 2016-04-08 21:52:13 +03:00
amvalidate.h Improve index AMs' opclass validation procedures. 2016-01-21 19:47:15 -05:00
attnum.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
brin.h Restructure index access method API to hide most of it at the C level. 2016-01-17 19:36:59 -05:00
brin_internal.h Restructure index access method API to hide most of it at the C level. 2016-01-17 19:36:59 -05:00
brin_page.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
brin_pageops.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
brin_revmap.h Add the "snapshot too old" feature 2016-04-08 14:36:30 -05:00
brin_tuple.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
brin_xlog.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
clog.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
commit_ts.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
genam.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
generic_xlog.h Add Generic WAL interface 2016-04-01 12:21:48 +03:00
gin.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
gin_private.h Add the "snapshot too old" feature 2016-04-08 14:36:30 -05:00
gist.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
gist_private.h Restructure index access method API to hide most of it at the C level. 2016-01-17 19:36:59 -05:00
gistscan.h Restructure index access method API to hide most of it at the C level. 2016-01-17 19:36:59 -05:00
hash.h Restructure index access method API to hide most of it at the C level. 2016-01-17 19:36:59 -05:00
heapam.h Change the format of the VM fork to add a second bit per page. 2016-03-01 21:49:41 -05:00
heapam_xlog.h Change the format of the VM fork to add a second bit per page. 2016-03-01 21:49:41 -05:00
hio.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
htup.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
htup_details.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
itup.h Revert CREATE INDEX ... INCLUDING ... 2016-04-08 21:52:13 +03:00
multixact.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
nbtree.h Add the "snapshot too old" feature 2016-04-08 14:36:30 -05:00
parallel.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
printtup.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
reloptions.h Restructure index access method API to hide most of it at the C level. 2016-01-17 19:36:59 -05:00
relscan.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
rewriteheap.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
rmgr.h Add rmgr callback to name xlog record types for display purposes. 2014-09-19 16:20:29 +02:00
rmgrlist.h Generic Messages for Logical Decoding 2016-04-06 10:05:41 +01:00
sdir.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
skey.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
slru.h Make all built-in lwlock tranche IDs fixed. 2016-02-02 06:45:55 -05:00
spgist.h Introduce traversalValue for SP-GiST scan 2016-03-30 18:29:28 +03:00
spgist_private.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
stratnum.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
subtrans.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
sysattr.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
timeline.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
transam.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
tsmapi.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
tupconvert.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
tupdesc.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
tupmacs.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
tuptoaster.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
twophase.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
twophase_rmgr.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
valid.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
visibilitymap.h Change the format of the VM fork to add a second bit per page. 2016-03-01 21:49:41 -05:00
xact.h Add new replication mode synchronous_commit = 'remote_apply'. 2016-03-29 21:29:49 -04:00
xlog.h Implement backup API functions for non-exclusive backups 2016-04-05 20:03:49 +02:00
xlog_fn.h Implement backup API functions for non-exclusive backups 2016-04-05 20:03:49 +02:00
xlog_internal.h Add Generic WAL interface 2016-04-01 12:21:48 +03:00
xlogdefs.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
xloginsert.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
xlogreader.h Enable logical slots to follow timeline switches 2016-03-30 20:07:05 -03:00
xlogrecord.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
xlogutils.h XLogReader general code cleanup 2016-03-30 18:56:13 -03:00