Skip to content
GitLab
Explore
Sign in
Register
Primary navigation
Search or go to…
Project
P
postgres-lambda-diff
Manage
Activity
Members
Labels
Plan
Issues
Issue boards
Milestones
Wiki
Code
Merge requests
Repository
Branches
Commits
Tags
Repository graph
Compare revisions
Snippets
Build
Pipelines
Jobs
Pipeline schedules
Artifacts
Deploy
Releases
Container Registry
Model registry
Operate
Environments
Monitor
Incidents
Analyze
Value stream analytics
Contributor analytics
CI/CD analytics
Repository analytics
Model experiments
Help
Help
Support
GitLab documentation
Compare GitLab plans
Community forum
Contribute to GitLab
Provide feedback
Keyboard shortcuts
?
Snippets
Groups
Projects
Show more breadcrumbs
Jakob Huber
postgres-lambda-diff
Commits
b0d5036c
Commit
b0d5036c
authored
24 years ago
by
Hiroshi Inoue
Browse files
Options
Downloads
Patches
Plain Diff
CREATE btree INDEX takes dead tuples into account when old transactions
are running.
parent
5ab40f0b
No related branches found
Branches containing commit
No related tags found
Tags containing commit
No related merge requests found
Changes
3
Hide whitespace changes
Inline
Side-by-side
Showing
3 changed files
src/backend/access/nbtree/nbtree.c
+58
-4
58 additions, 4 deletions
src/backend/access/nbtree/nbtree.c
src/backend/access/nbtree/nbtsort.c
+102
-22
102 additions, 22 deletions
src/backend/access/nbtree/nbtsort.c
src/include/access/nbtree.h
+2
-2
2 additions, 2 deletions
src/include/access/nbtree.h
with
162 additions
and
28 deletions
src/backend/access/nbtree/nbtree.c
+
58
−
4
View file @
b0d5036c
...
...
@@ -12,7 +12,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/nbtree/nbtree.c,v 1.6
2
2000/0
7/21 06:42:32 tgl
Exp $
* $Header: /cvsroot/pgsql/src/backend/access/nbtree/nbtree.c,v 1.6
3
2000/0
8/10 02:33:20 inoue
Exp $
*
*-------------------------------------------------------------------------
*/
...
...
@@ -25,6 +25,7 @@
#include
"catalog/index.h"
#include
"executor/executor.h"
#include
"miscadmin.h"
#include
"storage/sinval.h"
bool
BuildingBtree
=
false
;
/* see comment in btbuild() */
...
...
@@ -70,6 +71,16 @@ btbuild(PG_FUNCTION_ARGS)
BTSpool
*
spool
=
NULL
;
BTItem
btitem
;
bool
usefast
;
Snapshot
snapshot
;
TransactionId
XmaxRecent
;
/*
* spool2 is needed only when the index is an unique index.
* Dead tuples are put into spool2 instead of spool in
* order to avoid uniqueness check.
*/
BTSpool
*
spool2
=
NULL
;
bool
tupleIsAlive
;
int
dead_count
;
/* note that this is a new btree */
BuildingBtree
=
true
;
...
...
@@ -135,13 +146,41 @@ btbuild(PG_FUNCTION_ARGS)
nhtups
=
nitups
=
0
;
if
(
usefast
)
{
spool
=
_bt_spoolinit
(
index
,
indexInfo
->
ii_Unique
);
/*
* Different from spool,the uniqueness isn't checked
* for spool2.
*/
if
(
indexInfo
->
ii_Unique
)
spool2
=
_bt_spoolinit
(
index
,
false
);
}
/* start a heap scan */
hscan
=
heap_beginscan
(
heap
,
0
,
SnapshotNow
,
0
,
(
ScanKey
)
NULL
);
dead_count
=
0
;
snapshot
=
(
IsBootstrapProcessingMode
()
?
SnapshotNow
:
SnapshotAny
);
hscan
=
heap_beginscan
(
heap
,
0
,
snapshot
,
0
,
(
ScanKey
)
NULL
);
XmaxRecent
=
0
;
if
(
snapshot
==
SnapshotAny
)
GetXmaxRecent
(
&
XmaxRecent
);
while
(
HeapTupleIsValid
(
htup
=
heap_getnext
(
hscan
,
0
)))
{
if
(
snapshot
==
SnapshotAny
)
{
tupleIsAlive
=
HeapTupleSatisfiesNow
(
htup
->
t_data
);
if
(
!
tupleIsAlive
)
{
if
((
htup
->
t_data
->
t_infomask
&
HEAP_XMIN_INVALID
)
!=
0
)
continue
;
if
(
htup
->
t_data
->
t_infomask
&
HEAP_XMAX_COMMITTED
&&
htup
->
t_data
->
t_xmax
<
XmaxRecent
)
continue
;
}
}
else
tupleIsAlive
=
true
;
MemoryContextReset
(
econtext
->
ecxt_per_tuple_memory
);
nhtups
++
;
...
...
@@ -222,7 +261,15 @@ btbuild(PG_FUNCTION_ARGS)
* into the btree.
*/
if
(
usefast
)
_bt_spool
(
btitem
,
spool
);
{
if
(
tupleIsAlive
||
!
spool2
)
_bt_spool
(
btitem
,
spool
);
else
/* dead tuples are put into spool2 */
{
dead_count
++
;
_bt_spool
(
btitem
,
spool2
);
}
}
else
res
=
_bt_doinsert
(
index
,
btitem
,
indexInfo
->
ii_Unique
,
heap
);
...
...
@@ -234,6 +281,11 @@ btbuild(PG_FUNCTION_ARGS)
/* okay, all heap tuples are indexed */
heap_endscan
(
hscan
);
if
(
spool2
&&
!
dead_count
)
/* spool2 was found to be unnecessary */
{
_bt_spooldestroy
(
spool2
);
spool2
=
NULL
;
}
#ifndef OMIT_PARTIAL_INDEX
if
(
pred
!=
NULL
||
oldPred
!=
NULL
)
...
...
@@ -250,8 +302,10 @@ btbuild(PG_FUNCTION_ARGS)
*/
if
(
usefast
)
{
_bt_leafbuild
(
spool
);
_bt_leafbuild
(
spool
,
spool2
);
_bt_spooldestroy
(
spool
);
if
(
spool2
)
_bt_spooldestroy
(
spool2
);
}
#ifdef BTREE_BUILD_STATS
...
...
This diff is collapsed.
Click to expand it.
src/backend/access/nbtree/nbtsort.c
+
102
−
22
View file @
b0d5036c
...
...
@@ -35,7 +35,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/nbtree/nbtsort.c,v 1.5
6
2000/0
7/21 22:14:09 tgl
Exp $
* $Header: /cvsroot/pgsql/src/backend/access/nbtree/nbtsort.c,v 1.5
7
2000/0
8/10 02:33:20 inoue
Exp $
*
*-------------------------------------------------------------------------
*/
...
...
@@ -95,7 +95,7 @@ static void _bt_sortaddtup(Page page, Size itemsize,
BTItem
btitem
,
OffsetNumber
itup_off
);
static
void
_bt_buildadd
(
Relation
index
,
BTPageState
*
state
,
BTItem
bti
);
static
void
_bt_uppershutdown
(
Relation
index
,
BTPageState
*
state
);
static
void
_bt_load
(
Relation
index
,
BTSpool
*
btspool
);
static
void
_bt_load
(
Relation
index
,
BTSpool
*
btspool
,
BTSpool
*
btspool2
);
/*
...
...
@@ -153,7 +153,7 @@ _bt_spool(BTItem btitem, BTSpool *btspool)
* create an entire btree.
*/
void
_bt_leafbuild
(
BTSpool
*
btspool
)
_bt_leafbuild
(
BTSpool
*
btspool
,
BTSpool
*
btspool2
)
{
#ifdef BTREE_BUILD_STATS
if
(
Show_btree_build_stats
)
...
...
@@ -165,7 +165,9 @@ _bt_leafbuild(BTSpool *btspool)
#endif
/* BTREE_BUILD_STATS */
tuplesort_performsort
(
btspool
->
sortstate
);
_bt_load
(
btspool
->
index
,
btspool
);
if
(
btspool2
)
tuplesort_performsort
(
btspool2
->
sortstate
);
_bt_load
(
btspool
->
index
,
btspool
,
btspool2
);
}
...
...
@@ -523,28 +525,106 @@ _bt_uppershutdown(Relation index, BTPageState *state)
* btree leaves.
*/
static
void
_bt_load
(
Relation
index
,
BTSpool
*
btspool
)
_bt_load
(
Relation
index
,
BTSpool
*
btspool
,
BTSpool
*
btspool2
)
{
BTPageState
*
state
=
NULL
;
for
(;;)
bool
merge
=
(
btspool2
!=
NULL
);
BTItem
bti
,
bti2
=
NULL
;
bool
should_free
,
should_free2
,
load1
;
TupleDesc
tupdes
=
RelationGetDescr
(
index
);
int
i
,
keysz
=
RelationGetNumberOfAttributes
(
index
);
ScanKey
indexScanKey
=
NULL
;
if
(
merge
)
{
BTItem
bti
;
bool
should_free
;
bti
=
(
BTItem
)
tuplesort_getindextuple
(
btspool
->
sortstate
,
true
,
&
should_free
);
if
(
bti
==
(
BTItem
)
NULL
)
break
;
/* When we see first tuple, create first index page */
if
(
state
==
NULL
)
state
=
_bt_pagestate
(
index
,
BTP_LEAF
,
0
);
_bt_buildadd
(
index
,
state
,
bti
);
/*
* Another BTSpool for dead tuples exists.
* Now we have to merge btspool and btspool2.
*/
ScanKey
entry
;
Datum
attrDatum1
,
attrDatum2
;
bool
isFirstNull
,
isSecondNull
;
int32
compare
;
/* the preparation of merge */
bti
=
(
BTItem
)
tuplesort_getindextuple
(
btspool
->
sortstate
,
true
,
&
should_free
);
bti2
=
(
BTItem
)
tuplesort_getindextuple
(
btspool2
->
sortstate
,
true
,
&
should_free2
);
indexScanKey
=
_bt_mkscankey_nodata
(
index
);
for
(;;)
{
load1
=
true
;
/* load BTSpool next ? */
if
(
NULL
==
bti2
)
{
if
(
NULL
==
bti
)
break
;
}
else
if
(
NULL
!=
bti
)
{
for
(
i
=
1
;
i
<=
keysz
;
i
++
)
{
entry
=
indexScanKey
+
i
-
1
;
attrDatum1
=
index_getattr
((
IndexTuple
)
bti
,
i
,
tupdes
,
&
isFirstNull
);
attrDatum2
=
index_getattr
((
IndexTuple
)
bti2
,
i
,
tupdes
,
&
isSecondNull
);
if
(
isFirstNull
)
{
if
(
!
isSecondNull
)
{
load1
=
false
;
break
;
}
}
else
if
(
isSecondNull
)
break
;
else
{
compare
=
DatumGetInt32
(
FunctionCall2
(
&
entry
->
sk_func
,
attrDatum1
,
attrDatum2
));
if
(
compare
>
0
)
{
load1
=
false
;
break
;
}
else
if
(
compare
<
0
)
break
;
}
}
}
else
load1
=
false
;
/* When we see first tuple, create first index page */
if
(
state
==
NULL
)
state
=
_bt_pagestate
(
index
,
BTP_LEAF
,
0
);
if
(
load1
)
{
_bt_buildadd
(
index
,
state
,
bti
);
if
(
should_free
)
pfree
((
void
*
)
bti
);
bti
=
(
BTItem
)
tuplesort_getindextuple
(
btspool
->
sortstate
,
true
,
&
should_free
);
}
else
{
_bt_buildadd
(
index
,
state
,
bti2
);
if
(
should_free2
)
pfree
((
void
*
)
bti2
);
bti2
=
(
BTItem
)
tuplesort_getindextuple
(
btspool2
->
sortstate
,
true
,
&
should_free2
);
}
}
_bt_freeskey
(
indexScanKey
);
}
else
/* merge is unnecessary */
{
while
(
bti
=
(
BTItem
)
tuplesort_getindextuple
(
btspool
->
sortstate
,
true
,
&
should_free
),
bti
!=
(
BTItem
)
NULL
)
{
/* When we see first tuple, create first index page */
if
(
state
==
NULL
)
state
=
_bt_pagestate
(
index
,
BTP_LEAF
,
0
);
if
(
should_free
)
pfree
((
void
*
)
bti
);
_bt_buildadd
(
index
,
state
,
bti
);
if
(
should_free
)
pfree
((
void
*
)
bti
);
}
}
/* Close down final pages, if we had any data at all */
...
...
This diff is collapsed.
Click to expand it.
src/include/access/nbtree.h
+
2
−
2
View file @
b0d5036c
...
...
@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: nbtree.h,v 1.4
0
2000/0
7/25 04:47:57 tgl
Exp $
* $Id: nbtree.h,v 1.4
1
2000/0
8/10 02:33:19 inoue
Exp $
*
*-------------------------------------------------------------------------
*/
...
...
@@ -289,6 +289,6 @@ typedef struct BTSpool BTSpool; /* opaque type known only within nbtsort.c */
extern
BTSpool
*
_bt_spoolinit
(
Relation
index
,
bool
isunique
);
extern
void
_bt_spooldestroy
(
BTSpool
*
btspool
);
extern
void
_bt_spool
(
BTItem
btitem
,
BTSpool
*
btspool
);
extern
void
_bt_leafbuild
(
BTSpool
*
btspool
);
extern
void
_bt_leafbuild
(
BTSpool
*
btspool
,
BTSpool
*
spool2
);
#endif
/* NBTREE_H */
This diff is collapsed.
Click to expand it.
Preview
0%
Loading
Try again
or
attach a new file
.
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Save comment
Cancel
Please
register
or
sign in
to comment