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Fix progress reporting of REINDEX CONCURRENTLY 

This addresses a couple of issues with the so-said subject:
- Report the correct parent relation with the index actually being
rebuilt or validated.  Previously, the command status remained set to
the last index created for the progress of the index build and
validation, which would be incorrect when working on a table that has
more than one index.
- Use the correct phase when waiting before the drop of the old
indexes.  Previously, this was reported with the same status as when
waiting before the old indexes are marked as dead.

Author: Matthias van de Meent, Michael Paquier
Discussion: https://postgr.es/m/CAEze2WhqFgcwe1_tv=sFYhLWV2AdpfukumotJ6JNcAOQs3jufg@mail.gmail.com
Backpatch-through: 12
This commit is contained in:
Michael Paquier 2020-09-29 14:15:57 +09:00
parent 56fe008996
commit e66bcfb4c6
1 changed files with 54 additions and 16 deletions
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70
src/backend/commands/indexcmds.c
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@ -3015,6 +3015,13 @@ ReindexRelationConcurrently(Oid relationOid, int options)
char *relationName = NULL;
char *relationNamespace = NULL;
PGRUsage ru0;
const int progress_index[] = {
PROGRESS_CREATEIDX_COMMAND,
PROGRESS_CREATEIDX_PHASE,
PROGRESS_CREATEIDX_INDEX_OID,
PROGRESS_CREATEIDX_ACCESS_METHOD_OID
};
int64 progress_vals[4];
/*
* Create a memory context that will survive forced transaction commits we
@ -3294,12 +3301,11 @@ ReindexRelationConcurrently(Oid relationOid, int options)
pgstat_progress_start_command(PROGRESS_COMMAND_CREATE_INDEX,
RelationGetRelid(heapRel));
pgstat_progress_update_param(PROGRESS_CREATEIDX_COMMAND,
PROGRESS_CREATEIDX_COMMAND_REINDEX_CONCURRENTLY);
pgstat_progress_update_param(PROGRESS_CREATEIDX_INDEX_OID,
indexId);
pgstat_progress_update_param(PROGRESS_CREATEIDX_ACCESS_METHOD_OID,
indexRel->rd_rel->relam);
progress_vals[0] = PROGRESS_CREATEIDX_COMMAND_REINDEX_CONCURRENTLY;
progress_vals[1] = 0; /* initializing */
progress_vals[2] = indexId;
progress_vals[3] = indexRel->rd_rel->relam;
pgstat_progress_update_multi_param(4, progress_index, progress_vals);
/* Choose a temporary relation name for the new index */
concurrentName = ChooseRelationName(get_rel_name(indexId),
@ -3403,12 +3409,12 @@ ReindexRelationConcurrently(Oid relationOid, int options)
WaitForLockersMultiple(lockTags, ShareLock, true);
CommitTransactionCommand();
forboth(lc, indexIds, lc2, newIndexIds)
foreach(lc, newIndexIds)
{
Relation indexRel;
Oid oldIndexId = lfirst_oid(lc);
Oid newIndexId = lfirst_oid(lc2);
Relation newIndexRel;
Oid newIndexId = lfirst_oid(lc);
Oid heapId;
Oid indexam;
/* Start new transaction for this index's concurrent build */
StartTransactionCommand();
@ -3427,9 +3433,21 @@ ReindexRelationConcurrently(Oid relationOid, int options)
* Index relation has been closed by previous commit, so reopen it to
* get its information.
*/
indexRel = index_open(oldIndexId, ShareUpdateExclusiveLock);
heapId = indexRel->rd_index->indrelid;
index_close(indexRel, NoLock);
newIndexRel = index_open(newIndexId, ShareUpdateExclusiveLock);
heapId = newIndexRel->rd_index->indrelid;
indexam = newIndexRel->rd_rel->relam;
index_close(newIndexRel, NoLock);
/*
* Update progress for the index to build, with the correct parent
* table involved.
*/
pgstat_progress_start_command(PROGRESS_COMMAND_CREATE_INDEX, heapId);
progress_vals[0] = PROGRESS_CREATEIDX_COMMAND_REINDEX_CONCURRENTLY;
progress_vals[1] = PROGRESS_CREATEIDX_PHASE_BUILD;
progress_vals[2] = newIndexId;
progress_vals[3] = indexam;
pgstat_progress_update_multi_param(4, progress_index, progress_vals);
/* Perform concurrent build of new index */
index_concurrently_build(heapId, newIndexId);
@ -3458,6 +3476,8 @@ ReindexRelationConcurrently(Oid relationOid, int options)
Oid heapId;
TransactionId limitXmin;
Snapshot snapshot;
Relation newIndexRel;
Oid indexam;
StartTransactionCommand();
@ -3468,8 +3488,6 @@ ReindexRelationConcurrently(Oid relationOid, int options)
*/
CHECK_FOR_INTERRUPTS();
heapId = IndexGetRelation(newIndexId, false);
/*
* Take the "reference snapshot" that will be used by validate_index()
* to filter candidate tuples.
@ -3477,6 +3495,26 @@ ReindexRelationConcurrently(Oid relationOid, int options)
snapshot = RegisterSnapshot(GetTransactionSnapshot());
PushActiveSnapshot(snapshot);
/*
* Index relation has been closed by previous commit, so reopen it to
* get its information.
*/
newIndexRel = index_open(newIndexId, ShareUpdateExclusiveLock);
heapId = newIndexRel->rd_index->indrelid;
indexam = newIndexRel->rd_rel->relam;
index_close(newIndexRel, NoLock);
/*
* Update progress for the index to build, with the correct parent
* table involved.
*/
pgstat_progress_start_command(PROGRESS_COMMAND_CREATE_INDEX, heapId);
progress_vals[0] = PROGRESS_CREATEIDX_COMMAND_REINDEX_CONCURRENTLY;
progress_vals[1] = PROGRESS_CREATEIDX_PHASE_VALIDATE_IDXSCAN;
progress_vals[2] = newIndexId;
progress_vals[3] = indexam;
pgstat_progress_update_multi_param(4, progress_index, progress_vals);
validate_index(heapId, newIndexId, snapshot);
/*
@ -3611,7 +3649,7 @@ ReindexRelationConcurrently(Oid relationOid, int options)
*/
pgstat_progress_update_param(PROGRESS_CREATEIDX_PHASE,
PROGRESS_CREATEIDX_PHASE_WAIT_4);
PROGRESS_CREATEIDX_PHASE_WAIT_5);
WaitForLockersMultiple(lockTags, AccessExclusiveLock, true);
PushActiveSnapshot(GetTransactionSnapshot());