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体验新版 GitCode,发现更多精彩内容 >>
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a455c942
编写于
3月 03, 2003
作者:
T
Tom Lane
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差异文件
Prevent clustering on incomplete indexes: partial indexes are verboten,
as are non-amindexnulls AMs unless first column is attnotnull.
上级
d28cd227
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1
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1 changed file
with
30 addition
and
1 deletion
+30
-1
src/backend/commands/cluster.c
src/backend/commands/cluster.c
+30
-1
未找到文件。
src/backend/commands/cluster.c
浏览文件 @
a455c942
...
...
@@ -11,7 +11,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/cluster.c,v 1.10
5 2003/02/09 06:56:26
tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/cluster.c,v 1.10
6 2003/03/03 04:37:37
tgl Exp $
*
*-------------------------------------------------------------------------
*/
...
...
@@ -160,6 +160,7 @@ cluster(ClusterStmt *stmt)
stmt
->
indexname
,
stmt
->
relation
->
relname
);
}
/* All other checks are done in cluster_rel() */
rvtc
.
tableOid
=
tableOid
;
rvtc
.
indexOid
=
indexOid
;
...
...
@@ -313,6 +314,34 @@ cluster_rel(RelToCluster *rvtc, bool recheck)
RelationGetRelationName
(
OldIndex
),
RelationGetRelationName
(
OldHeap
));
/*
* Disallow clustering on incomplete indexes (those that might not index
* every row of the relation). We could relax this by making a separate
* seqscan pass over the table to copy the missing rows, but that seems
* expensive and tedious.
*/
if
(
VARSIZE
(
&
OldIndex
->
rd_index
->
indpred
)
>
VARHDRSZ
)
/* partial? */
elog
(
ERROR
,
"CLUSTER: cannot cluster on partial index"
);
if
(
!
OldIndex
->
rd_am
->
amindexnulls
)
{
AttrNumber
colno
;
/*
* If the AM doesn't index nulls, then it's a partial index unless
* we can prove all the rows are non-null. Note we only need look
* at the first column; multicolumn-capable AMs are *required* to
* index nulls in columns after the first.
*/
if
(
OidIsValid
(
OldIndex
->
rd_index
->
indproc
))
elog
(
ERROR
,
"CLUSTER: cannot cluster on functional index when index access method does not handle nulls"
);
colno
=
OldIndex
->
rd_index
->
indkey
[
0
];
if
(
colno
>
0
)
/* system columns are non-null */
if
(
!
OldHeap
->
rd_att
->
attrs
[
colno
-
1
]
->
attnotnull
)
elog
(
ERROR
,
"CLUSTER: cannot cluster when index access method does not handle nulls"
"
\n\t
You may be able to work around this by marking column
\"
%s
\"
NOT NULL"
,
NameStr
(
OldHeap
->
rd_att
->
attrs
[
colno
-
1
]
->
attname
));
}
/*
* Disallow clustering system relations. This will definitely NOT
* work for shared relations (we have no way to update pg_class rows
...
...
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