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Improve and fix some error handling for REINDEX INDEX/TABLE CONCURRENTLY

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This improves the user experience when it comes to restrict several
flavors of REINDEX CONCURRENTLY.  First, for INDEX, remove a restriction
on shared relations as we already check after catalog relations.  Then,
for TABLE, add a proper error message when attempting to run the command
on system catalogs.  The code path of CREATE INDEX CONCURRENTLY already
complains about that, but if a REINDEX is issued then then the error
generated is confusing.

While on it, add more tests to check restrictions on catalog indexes and
on toast table/index for catalogs.  Some error messages are improved,
with wording suggestion coming from Tom Lane.

Reported-by: Tom Lane
Author: Michael Paquier
Reviewed-by: Tom Lane
Discussion: https://postgr.es/m/23694.1556806002@sss.pgh.pa.us
This commit is contained in:
Michael Paquier
2019-05-10 08:18:46 +09:00
parent 24c19e9f66
commit 508300e2e1
3 changed files with 27 additions and 19 deletions
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22
src/backend/commands/indexcmds.c
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@ -2743,6 +2743,12 @@ ReindexRelationConcurrently(Oid relationOid, int options)
MemoryContextSwitchTo(oldcontext);
/* A system catalog cannot be reindexed concurrently */
if (IsCatalogRelationOid(relationOid))
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("cannot reindex a system catalog concurrently")));
/* Open relation to get its indexes */
heapRelation = table_open(relationOid, ShareUpdateExclusiveLock);
@ -2756,13 +2762,13 @@ ReindexRelationConcurrently(Oid relationOid, int options)
if (!indexRelation->rd_index->indisvalid)
ereport(WARNING,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("cannot reindex concurrently invalid index \"%s.%s\", skipping",
errmsg("cannot reindex invalid index \"%s.%s\" concurrently, skipping",
get_namespace_name(get_rel_namespace(cellOid)),
get_rel_name(cellOid))));
else if (indexRelation->rd_index->indisexclusion)
ereport(WARNING,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("cannot reindex concurrently exclusion constraint index \"%s.%s\", skipping",
errmsg("cannot reindex exclusion constraint index \"%s.%s\" concurrently, skipping",
get_namespace_name(get_rel_namespace(cellOid)),
get_rel_name(cellOid))));
else
@ -2802,7 +2808,7 @@ ReindexRelationConcurrently(Oid relationOid, int options)
if (!indexRelation->rd_index->indisvalid)
ereport(WARNING,
(errcode(ERRCODE_INDEX_CORRUPTED),
errmsg("cannot reindex concurrently invalid index \"%s.%s\", skipping",
errmsg("cannot reindex invalid index \"%s.%s\" concurrently, skipping",
get_namespace_name(get_rel_namespace(cellOid)),
get_rel_name(cellOid))));
else
@ -2831,17 +2837,11 @@ ReindexRelationConcurrently(Oid relationOid, int options)
{
Oid heapId = IndexGetRelation(relationOid, false);
/* A shared relation cannot be reindexed concurrently */
if (IsSharedRelation(heapId))
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("concurrent reindex is not supported for shared relations")));
/* A system catalog cannot be reindexed concurrently */
if (IsCatalogRelationOid(heapId))
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("concurrent reindex is not supported for catalog relations")));
errmsg("cannot reindex a system catalog concurrently")));
/* Save the list of relation OIDs in private context */
oldcontext = MemoryContextSwitchTo(private_context);
@ -2869,7 +2869,7 @@ ReindexRelationConcurrently(Oid relationOid, int options)
/* Return error if type of relation is not supported */
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
errmsg("cannot reindex concurrently this type of relation")));
errmsg("cannot reindex this type of relation concurrently")));
break;
}