LCOV - differential code coverage report
Current view: top level - src/backend/utils/activity - pgstat_relation.c (source / functions) Coverage Total Hit UNC UBC GNC CBC DCB
Current: ba12a202ce1b5581dc0ed149cf3f637d7897ad5d vs 2866d8c7dbfc9d882a7d80fef93fbbe763709932 Lines: 97.0 % 399 387 10 2 148 239 128
Current Date: 2026-08-27 14:31:44 +0300 Functions: 100.0 % 31 31 23 8 4
Baseline: lcov-20260827-baseline Branches: 79.5 % 210 167 16 27 40 127
Baseline Date: 2026-08-27 14:31:58 +0300 Line coverage date bins:
Legend: Lines:     hit not hit
Branches: + taken - not taken # not executed
(7,30] days: 93.7 % 158 148 10 148
(30,360] days: 100.0 % 10 10 10
(360..) days: 99.1 % 231 229 2 229
Function coverage date bins:
(7,30] days: 100.0 % 5 5 5
(30,360] days: 100.0 % 3 3 3
(360..) days: 100.0 % 23 23 18 5
Branch coverage date bins:
(7,30] days: 71.4 % 56 40 16 40
(30,360] days: 100.0 % 2 2 2
(360..) days: 82.2 % 152 125 27 125

 Age         Owner                    Branch data    TLA  Line data    Source code
                                  1                 :                : /* -------------------------------------------------------------------------
                                  2                 :                :  *
                                  3                 :                :  * pgstat_relation.c
                                  4                 :                :  *    Implementation of relation statistics.
                                  5                 :                :  *
                                  6                 :                :  * This file contains the implementation of relation statistics. It is kept
                                  7                 :                :  * separate from pgstat.c to enforce the line between the statistics access /
                                  8                 :                :  * storage implementation and the details about individual types of
                                  9                 :                :  * statistics.
                                 10                 :                :  *
                                 11                 :                :  * Copyright (c) 2001-2026, PostgreSQL Global Development Group
                                 12                 :                :  *
                                 13                 :                :  * IDENTIFICATION
                                 14                 :                :  *    src/backend/utils/activity/pgstat_relation.c
                                 15                 :                :  * -------------------------------------------------------------------------
                                 16                 :                :  */
                                 17                 :                : 
                                 18                 :                : #include "postgres.h"
                                 19                 :                : 
                                 20                 :                : #include "access/twophase_rmgr.h"
                                 21                 :                : #include "access/xact.h"
                                 22                 :                : #include "catalog/catalog.h"
                                 23                 :                : #include "utils/memutils.h"
                                 24                 :                : #include "utils/pgstat_internal.h"
                                 25                 :                : #include "utils/rel.h"
                                 26                 :                : #include "utils/timestamp.h"
                                 27                 :                : 
                                 28                 :                : 
                                 29                 :                : /* Record that's written to 2PC state file when pgstat state is persisted */
                                 30                 :                : typedef struct TwoPhasePgStatRecord
                                 31                 :                : {
                                 32                 :                :     PgStat_Counter tuples_inserted; /* tuples inserted in xact */
                                 33                 :                :     PgStat_Counter tuples_updated;  /* tuples updated in xact */
                                 34                 :                :     PgStat_Counter tuples_deleted;  /* tuples deleted in xact */
                                 35                 :                :     /* tuples i/u/d prior to truncate/drop */
                                 36                 :                :     PgStat_Counter inserted_pre_truncdrop;
                                 37                 :                :     PgStat_Counter updated_pre_truncdrop;
                                 38                 :                :     PgStat_Counter deleted_pre_truncdrop;
                                 39                 :                :     Oid         id;             /* table's OID */
                                 40                 :                :     bool        shared;         /* is it a shared catalog? */
                                 41                 :                :     bool        truncdropped;   /* was the relation truncated/dropped? */
                                 42                 :                : } TwoPhasePgStatRecord;
                                 43                 :                : 
                                 44                 :                : 
                                 45                 :                : static PgStat_RelationStatus *pgstat_prep_relation_pending(PgStat_Kind kind,
                                 46                 :                :                                                            Oid rel_id, bool isshared);
                                 47                 :                : static void add_tabstat_xact_level(PgStat_RelationStatus *pgstat_info, int nest_level);
                                 48                 :                : static void ensure_tabstat_xact_level(PgStat_RelationStatus *pgstat_info);
                                 49                 :                : static void save_truncdrop_counters(PgStat_TableXactStatus *trans, bool is_drop);
                                 50                 :                : static void restore_truncdrop_counters(PgStat_TableXactStatus *trans);
                                 51                 :                : 
                                 52                 :                : /*
                                 53                 :                :  * Determine the stats kind for a relation based on its relkind.
                                 54                 :                :  */
                                 55                 :                : static inline PgStat_Kind
   15 michael@paquier.xyz        56                 :GNC     1303359 : pgstat_get_relation_kind(char relkind)
                                 57                 :                : {
                                 58         [ +  + ]:        1303359 :     if (relkind == RELKIND_INDEX)
                                 59                 :         695018 :         return PGSTAT_KIND_INDEX;
                                 60                 :         608341 :     return PGSTAT_KIND_RELATION;
                                 61                 :                : }
                                 62                 :                : 
                                 63                 :                : 
                                 64                 :                : /*
                                 65                 :                :  * Copy stats between relations. This is used for things like REINDEX
                                 66                 :                :  * CONCURRENTLY.
                                 67                 :                :  */
                                 68                 :                : void
 1604 andres@anarazel.de         69                 :CBC         326 : pgstat_copy_relation_stats(Relation dst, Relation src)
                                 70                 :                : {
   15 michael@paquier.xyz        71                 :GNC         326 :     PgStat_Kind kind = pgstat_get_relation_kind(src->rd_rel->relkind);
                                 72                 :                : 
                                 73         [ +  - ]:            326 :     if (kind == PGSTAT_KIND_INDEX)
                                 74                 :                :     {
                                 75                 :                :         PgStat_StatIdxEntry *srcstats;
                                 76                 :                :         PgStatShared_Index *dstshstats;
                                 77                 :                :         PgStat_EntryRef *dst_ref;
                                 78                 :                : 
                                 79                 :            326 :         srcstats = pgstat_fetch_stat_idxentry_ext(src->rd_rel->relisshared,
                                 80                 :                :                                                   RelationGetRelid(src),
                                 81                 :                :                                                   NULL);
                                 82         [ +  + ]:            326 :         if (!srcstats)
                                 83                 :            193 :             return;
                                 84                 :                : 
                                 85                 :            133 :         dst_ref = pgstat_get_entry_ref_locked(PGSTAT_KIND_INDEX,
                                 86                 :            133 :                                               dst->rd_rel->relisshared ? InvalidOid : MyDatabaseId,
                                 87         [ -  + ]:            133 :                                               RelationGetRelid(dst),
                                 88                 :                :                                               false);
                                 89                 :                : 
                                 90                 :            133 :         dstshstats = (PgStatShared_Index *) dst_ref->shared_stats;
                                 91                 :            133 :         dstshstats->stats = *srcstats;
                                 92                 :                : 
                                 93                 :            133 :         pgstat_unlock_entry(dst_ref);
                                 94                 :                :     }
                                 95                 :                :     else
                                 96                 :                :     {
                                 97                 :                :         PgStat_StatTabEntry *srcstats;
                                 98                 :                :         PgStatShared_Relation *dstshstats;
                                 99                 :                :         PgStat_EntryRef *dst_ref;
                                100                 :                : 
   15 michael@paquier.xyz       101                 :UNC           0 :         srcstats = pgstat_fetch_stat_tabentry_ext(src->rd_rel->relisshared,
                                102                 :                :                                                   RelationGetRelid(src),
                                103                 :                :                                                   NULL);
                                104         [ #  # ]:              0 :         if (!srcstats)
                                105                 :              0 :             return;
                                106                 :                : 
                                107                 :              0 :         dst_ref = pgstat_get_entry_ref_locked(PGSTAT_KIND_RELATION,
                                108                 :              0 :                                               dst->rd_rel->relisshared ? InvalidOid : MyDatabaseId,
                                109         [ #  # ]:              0 :                                               RelationGetRelid(dst),
                                110                 :                :                                               false);
                                111                 :                : 
                                112                 :              0 :         dstshstats = (PgStatShared_Relation *) dst_ref->shared_stats;
                                113                 :              0 :         dstshstats->stats = *srcstats;
                                114                 :                : 
                                115                 :              0 :         pgstat_unlock_entry(dst_ref);
                                116                 :                :     }
                                117                 :                : }
                                118                 :                : 
                                119                 :                : /*
                                120                 :                :  * Initialize a relcache entry to count access statistics.  Called whenever a
                                121                 :                :  * relation is opened.
                                122                 :                :  *
                                123                 :                :  * We assume that a relcache entry's pgstat_info field is zeroed by relcache.c
                                124                 :                :  * when the relcache entry is made; thereafter it is long-lived data.
                                125                 :                :  *
                                126                 :                :  * This does not create a reference to a stats entry in shared memory, nor
                                127                 :                :  * allocate memory for the pending stats. That happens in
                                128                 :                :  * pgstat_assoc_relation().
                                129                 :                :  */
                                130                 :                : void
 1604 andres@anarazel.de        131                 :CBC    25902102 : pgstat_init_relation(Relation rel)
                                132                 :                : {
 1620                           133                 :       25902102 :     char        relkind = rel->rd_rel->relkind;
                                134                 :                : 
                                135                 :                :     /*
                                136                 :                :      * We only count stats for relations with storage and partitioned tables
                                137                 :                :      */
                                138   [ +  +  +  +  :       25902102 :     if (!RELKIND_HAS_STORAGE(relkind) && relkind != RELKIND_PARTITIONED_TABLE)
                                     +  +  +  +  +  
                                           +  +  + ]
                                139                 :                :     {
 1604                           140                 :          99326 :         rel->pgstat_enabled = false;
 1620                           141                 :          99326 :         rel->pgstat_info = NULL;
                                142                 :          99326 :         return;
                                143                 :                :     }
                                144                 :                : 
 1604                           145         [ +  + ]:       25802776 :     if (!pgstat_track_counts)
                                146                 :                :     {
                                147         [ +  + ]:            197 :         if (rel->pgstat_info)
                                148                 :             12 :             pgstat_unlink_relation(rel);
                                149                 :                : 
                                150                 :                :         /* We're not counting at all */
                                151                 :            197 :         rel->pgstat_enabled = false;
 1620                           152                 :            197 :         rel->pgstat_info = NULL;
                                153                 :            197 :         return;
                                154                 :                :     }
                                155                 :                : 
 1604                           156                 :       25802579 :     rel->pgstat_enabled = true;
                                157                 :                : }
                                158                 :                : 
                                159                 :                : /*
                                160                 :                :  * Prepare for statistics for this relation to be collected.
                                161                 :                :  *
                                162                 :                :  * This ensures we have a reference to the stats entry before stats can be
                                163                 :                :  * generated. That is important because a relation drop in another connection
                                164                 :                :  * could otherwise lead to the stats entry being dropped, which then later
                                165                 :                :  * would get recreated when flushing stats.
                                166                 :                :  *
                                167                 :                :  * This is separate from pgstat_init_relation() as it is not uncommon for
                                168                 :                :  * relcache entries to be opened without ever getting stats reported.
                                169                 :                :  */
                                170                 :                : void
                                171                 :        1166410 : pgstat_assoc_relation(Relation rel)
                                172                 :                : {
                                173                 :                :     PgStat_Kind kind;
                                174                 :                : 
                                175         [ -  + ]:        1166410 :     Assert(rel->pgstat_enabled);
                                176         [ -  + ]:        1166410 :     Assert(rel->pgstat_info == NULL);
                                177                 :                : 
   15 michael@paquier.xyz       178                 :GNC     1166410 :     kind = pgstat_get_relation_kind(rel->rd_rel->relkind);
                                179                 :                : 
                                180                 :                :     /* find or make the PgStat_RelationStatus entry, and update link */
                                181                 :        2332820 :     rel->pgstat_info = pgstat_prep_relation_pending(kind,
                                182                 :                :                                                     RelationGetRelid(rel),
 1604 andres@anarazel.de        183                 :CBC     1166410 :                                                     rel->rd_rel->relisshared);
                                184                 :                : 
                                185                 :                :     /* don't allow link a stats to multiple relcache entries */
                                186         [ -  + ]:        1166410 :     Assert(rel->pgstat_info->relation == NULL);
                                187                 :                : 
                                188                 :                :     /* mark this relation as the owner */
                                189                 :        1166410 :     rel->pgstat_info->relation = rel;
                                190                 :        1166410 : }
                                191                 :                : 
                                192                 :                : /*
                                193                 :                :  * Break the mutual link between a relcache entry and pending stats entry.
                                194                 :                :  * This must be called whenever one end of the link is removed.
                                195                 :                :  */
                                196                 :                : void
                                197                 :        1845250 : pgstat_unlink_relation(Relation rel)
                                198                 :                : {
                                199                 :                :     /* remove the link to stats info if any */
                                200         [ +  + ]:        1845250 :     if (rel->pgstat_info == NULL)
                                201                 :         678840 :         return;
                                202                 :                : 
                                203                 :                :     /* link sanity check */
                                204         [ -  + ]:        1166410 :     Assert(rel->pgstat_info->relation == rel);
                                205                 :        1166410 :     rel->pgstat_info->relation = NULL;
                                206                 :        1166410 :     rel->pgstat_info = NULL;
                                207                 :                : }
                                208                 :                : 
                                209                 :                : /*
                                210                 :                :  * Ensure that stats are dropped if transaction aborts.
                                211                 :                :  */
                                212                 :                : void
                                213                 :          88038 : pgstat_create_relation(Relation rel)
                                214                 :                : {
   15 michael@paquier.xyz       215                 :GNC       88038 :     PgStat_Kind kind = pgstat_get_relation_kind(rel->rd_rel->relkind);
                                216                 :                : 
                                217                 :          88038 :     pgstat_create_transactional(kind,
 1604 andres@anarazel.de        218                 :CBC       88038 :                                 rel->rd_rel->relisshared ? InvalidOid : MyDatabaseId,
                                219         [ +  + ]:          88038 :                                 RelationGetRelid(rel));
                                220                 :          88038 : }
                                221                 :                : 
                                222                 :                : /*
                                223                 :                :  * Ensure that stats are dropped if transaction commits.
                                224                 :                :  */
                                225                 :                : void
                                226                 :          48585 : pgstat_drop_relation(Relation rel)
                                227                 :                : {
                                228                 :          48585 :     int         nest_level = GetCurrentTransactionNestLevel();
                                229                 :                :     PgStat_RelationStatus *pgstat_info;
   15 michael@paquier.xyz       230                 :GNC       48585 :     PgStat_Kind kind = pgstat_get_relation_kind(rel->rd_rel->relkind);
                                231                 :                : 
                                232                 :          48585 :     pgstat_drop_transactional(kind,
 1604 andres@anarazel.de        233                 :CBC       48585 :                               rel->rd_rel->relisshared ? InvalidOid : MyDatabaseId,
                                234         [ -  + ]:          48585 :                               RelationGetRelid(rel));
                                235                 :                : 
                                236   [ +  +  +  +  :          48585 :     if (!pgstat_should_count_relation(rel))
                                              +  + ]
                                237                 :           5082 :         return;
                                238                 :                : 
                                239                 :                :     /*
                                240                 :                :      * Transactionally set counters to 0. That ensures that accesses to
                                241                 :                :      * pg_stat_xact_all_tables inside the transaction show 0.
                                242                 :                :      *
                                243                 :                :      * Indexes have no transactional counters, so leave.
                                244                 :                :      */
                                245                 :          43503 :     pgstat_info = rel->pgstat_info;
   13 michael@paquier.xyz       246         [ +  + ]:GNC       43503 :     if (pgstat_info->kind == PGSTAT_KIND_INDEX)
                                247                 :          14834 :         return;
                                248                 :                : 
                                249         [ +  + ]:          28669 :     if (pgstat_info->tab.trans &&
                                250         [ +  + ]:            881 :         pgstat_info->tab.trans->nest_level == nest_level)
                                251                 :                :     {
                                252                 :            877 :         save_truncdrop_counters(pgstat_info->tab.trans, true);
                                253                 :            877 :         pgstat_info->tab.trans->tuples_inserted = 0;
                                254                 :            877 :         pgstat_info->tab.trans->tuples_updated = 0;
                                255                 :            877 :         pgstat_info->tab.trans->tuples_deleted = 0;
                                256                 :                :     }
                                257                 :                : }
                                258                 :                : 
                                259                 :                : /*
                                260                 :                :  * Report that the table was just vacuumed and flush IO statistics.
                                261                 :                :  */
                                262                 :                : void
  253 michael@paquier.xyz       263                 :CBC       16437 : pgstat_report_vacuum(Relation rel, PgStat_Counter livetuples,
                                264                 :                :                      PgStat_Counter deadtuples, TimestampTz starttime)
                                265                 :                : {
                                266                 :                :     PgStat_EntryRef *entry_ref;
                                267                 :                :     PgStatShared_Relation *shtabentry;
                                268                 :                :     PgStat_StatTabEntry *tabentry;
                                269         [ +  + ]:          16437 :     Oid         dboid = (rel->rd_rel->relisshared ? InvalidOid : MyDatabaseId);
                                270                 :                :     TimestampTz ts;
                                271                 :                :     PgStat_Counter elapsedtime;
                                272                 :                : 
 1604 andres@anarazel.de        273         [ -  + ]:          16437 :     if (!pgstat_track_counts)
 1620 andres@anarazel.de        274                 :UBC           0 :         return;
                                275                 :                : 
                                276                 :                :     /* Store the data in the table's hash table entry. */
 1604 andres@anarazel.de        277                 :CBC       16437 :     ts = GetCurrentTimestamp();
  576 michael@paquier.xyz       278                 :          16437 :     elapsedtime = TimestampDifferenceMilliseconds(starttime, ts);
                                279                 :                : 
                                280                 :                :     /* block acquiring lock for the same reason as pgstat_report_autovac() */
  253                           281                 :          16437 :     entry_ref = pgstat_get_entry_ref_locked(PGSTAT_KIND_RELATION, dboid,
                                282                 :          16437 :                                             RelationGetRelid(rel), false);
                                283                 :                : 
 1604 andres@anarazel.de        284                 :          16437 :     shtabentry = (PgStatShared_Relation *) entry_ref->shared_stats;
                                285                 :          16437 :     tabentry = &shtabentry->stats;
                                286                 :                : 
 1360 michael@paquier.xyz       287                 :          16437 :     tabentry->live_tuples = livetuples;
                                288                 :          16437 :     tabentry->dead_tuples = deadtuples;
                                289                 :                : 
                                290                 :                :     /*
                                291                 :                :      * It is quite possible that a non-aggressive VACUUM ended up skipping
                                292                 :                :      * various pages, however, we'll zero the insert counter here regardless.
                                293                 :                :      * It's currently used only to track when we need to perform an "insert"
                                294                 :                :      * autovacuum, which are mainly intended to freeze newly inserted tuples.
                                295                 :                :      * Zeroing this may just mean we'll not try to vacuum the table again
                                296                 :                :      * until enough tuples have been inserted to trigger another insert
                                297                 :                :      * autovacuum.  An anti-wraparound autovacuum will catch any persistent
                                298                 :                :      * stragglers.
                                299                 :                :      */
                                300                 :          16437 :     tabentry->ins_since_vacuum = 0;
                                301                 :                : 
  906 heikki.linnakangas@i      302         [ +  + ]:          16437 :     if (AmAutoVacuumWorkerProcess())
                                303                 :                :     {
 1360 michael@paquier.xyz       304                 :            473 :         tabentry->last_autovacuum_time = ts;
                                305                 :            473 :         tabentry->autovacuum_count++;
  576                           306                 :            473 :         tabentry->total_autovacuum_time += elapsedtime;
                                307                 :                :     }
                                308                 :                :     else
                                309                 :                :     {
 1360                           310                 :          15964 :         tabentry->last_vacuum_time = ts;
 1604 andres@anarazel.de        311                 :          15964 :         tabentry->vacuum_count++;
  576 michael@paquier.xyz       312                 :          15964 :         tabentry->total_vacuum_time += elapsedtime;
                                313                 :                :     }
                                314                 :                : 
 1604 andres@anarazel.de        315                 :          16437 :     pgstat_unlock_entry(entry_ref);
                                316                 :                : 
                                317                 :                :     /*
                                318                 :                :      * Flush IO statistics now. pgstat_report_stat() will flush IO stats,
                                319                 :                :      * however this will not be called until after an entire autovacuum cycle
                                320                 :                :      * is done -- which will likely vacuum many relations -- or until the
                                321                 :                :      * VACUUM command has processed all tables and committed.
                                322                 :                :      */
 1296                           323                 :          16437 :     pgstat_flush_io(false);
  583 michael@paquier.xyz       324                 :          16437 :     (void) pgstat_flush_backend(false, PGSTAT_BACKEND_FLUSH_IO);
                                325                 :                : }
                                326                 :                : 
                                327                 :                : /*
                                328                 :                :  * Report that the table was just analyzed and flush IO statistics.
                                329                 :                :  *
                                330                 :                :  * Caller must provide new live- and dead-tuples estimates, as well as a
                                331                 :                :  * flag indicating whether to reset the mod_since_analyze counter.
                                332                 :                :  */
                                333                 :                : void
 1620 andres@anarazel.de        334                 :          10704 : pgstat_report_analyze(Relation rel,
                                335                 :                :                       PgStat_Counter livetuples, PgStat_Counter deadtuples,
                                336                 :                :                       bool resetcounter, TimestampTz starttime)
                                337                 :                : {
                                338                 :                :     PgStat_EntryRef *entry_ref;
                                339                 :                :     PgStatShared_Relation *shtabentry;
                                340                 :                :     PgStat_StatTabEntry *tabentry;
 1604                           341         [ +  + ]:          10704 :     Oid         dboid = (rel->rd_rel->relisshared ? InvalidOid : MyDatabaseId);
                                342                 :                :     TimestampTz ts;
                                343                 :                :     PgStat_Counter elapsedtime;
                                344                 :                : 
                                345         [ -  + ]:          10704 :     if (!pgstat_track_counts)
 1620 andres@anarazel.de        346                 :UBC           0 :         return;
                                347                 :                : 
                                348                 :                :     /*
                                349                 :                :      * Unlike VACUUM, ANALYZE might be running inside a transaction that has
                                350                 :                :      * already inserted and/or deleted rows in the target table. ANALYZE will
                                351                 :                :      * have counted such rows as live or dead respectively. Because we will
                                352                 :                :      * report our counts of such rows at transaction end, we should subtract
                                353                 :                :      * off these counts from the update we're making now, else they'll be
                                354                 :                :      * double-counted after commit.  (This approach also ensures that the
                                355                 :                :      * shared stats entry ends up with the right numbers if we abort instead
                                356                 :                :      * of committing.)
                                357                 :                :      *
                                358                 :                :      * Waste no time on partitioned tables, though.
                                359                 :                :      */
 1604 andres@anarazel.de        360   [ +  +  +  +  :CBC       10704 :     if (pgstat_should_count_relation(rel) &&
                                              +  + ]
 1620                           361         [ +  + ]:          10658 :         rel->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
                                362                 :                :     {
                                363                 :                :         PgStat_TableXactStatus *trans;
                                364                 :                : 
   13 michael@paquier.xyz       365         [ -  + ]:GNC       10153 :         Assert(rel->pgstat_info->kind == PGSTAT_KIND_RELATION);
                                366         [ +  + ]:          10288 :         for (trans = rel->pgstat_info->tab.trans; trans; trans = trans->upper)
                                367                 :                :         {
 1620 andres@anarazel.de        368                 :CBC         135 :             livetuples -= trans->tuples_inserted - trans->tuples_deleted;
                                369                 :            135 :             deadtuples -= trans->tuples_updated + trans->tuples_deleted;
                                370                 :                :         }
                                371                 :                :         /* count stuff inserted by already-aborted subxacts, too */
   13 michael@paquier.xyz       372                 :GNC       10153 :         deadtuples -= rel->pgstat_info->tab.counts.delta_dead_tuples;
                                373                 :                :         /* Since ANALYZE's counts are estimates, we could have underflowed */
 1620 andres@anarazel.de        374                 :CBC       10153 :         livetuples = Max(livetuples, 0);
                                375                 :          10153 :         deadtuples = Max(deadtuples, 0);
                                376                 :                :     }
                                377                 :                : 
                                378                 :                :     /* Store the data in the table's hash table entry. */
  576 michael@paquier.xyz       379                 :          10704 :     ts = GetCurrentTimestamp();
                                380                 :          10704 :     elapsedtime = TimestampDifferenceMilliseconds(starttime, ts);
                                381                 :                : 
                                382                 :                :     /* block acquiring lock for the same reason as pgstat_report_autovac() */
 1604 andres@anarazel.de        383                 :          10704 :     entry_ref = pgstat_get_entry_ref_locked(PGSTAT_KIND_RELATION, dboid,
                                384                 :          10704 :                                             RelationGetRelid(rel),
                                385                 :                :                                             false);
                                386                 :                :     /* can't get dropped while accessed */
                                387   [ +  -  -  + ]:          10704 :     Assert(entry_ref != NULL && entry_ref->shared_stats != NULL);
                                388                 :                : 
                                389                 :          10704 :     shtabentry = (PgStatShared_Relation *) entry_ref->shared_stats;
                                390                 :          10704 :     tabentry = &shtabentry->stats;
                                391                 :                : 
 1360 michael@paquier.xyz       392                 :          10704 :     tabentry->live_tuples = livetuples;
                                393                 :          10704 :     tabentry->dead_tuples = deadtuples;
                                394                 :                : 
                                395                 :                :     /*
                                396                 :                :      * If commanded, reset mod_since_analyze to zero.  This forgets any
                                397                 :                :      * changes that were committed while the ANALYZE was in progress, but we
                                398                 :                :      * have no good way to estimate how many of those there were.
                                399                 :                :      */
 1604 andres@anarazel.de        400         [ +  + ]:          10704 :     if (resetcounter)
 1360 michael@paquier.xyz       401                 :          10664 :         tabentry->mod_since_analyze = 0;
                                402                 :                : 
  906 heikki.linnakangas@i      403         [ +  + ]:          10704 :     if (AmAutoVacuumWorkerProcess())
                                404                 :                :     {
  576 michael@paquier.xyz       405                 :            758 :         tabentry->last_autoanalyze_time = ts;
 1360                           406                 :            758 :         tabentry->autoanalyze_count++;
  576                           407                 :            758 :         tabentry->total_autoanalyze_time += elapsedtime;
                                408                 :                :     }
                                409                 :                :     else
                                410                 :                :     {
                                411                 :           9946 :         tabentry->last_analyze_time = ts;
 1604 andres@anarazel.de        412                 :           9946 :         tabentry->analyze_count++;
  576 michael@paquier.xyz       413                 :           9946 :         tabentry->total_analyze_time += elapsedtime;
                                414                 :                :     }
                                415                 :                : 
 1604 andres@anarazel.de        416                 :          10704 :     pgstat_unlock_entry(entry_ref);
                                417                 :                : 
                                418                 :                :     /* see pgstat_report_vacuum() */
 1296                           419                 :          10704 :     pgstat_flush_io(false);
  583 michael@paquier.xyz       420                 :          10704 :     (void) pgstat_flush_backend(false, PGSTAT_BACKEND_FLUSH_IO);
                                421                 :                : }
                                422                 :                : 
                                423                 :                : /*
                                424                 :                :  * count a tuple insertion of n tuples
                                425                 :                :  */
                                426                 :                : void
 1620 andres@anarazel.de        427                 :       12311875 : pgstat_count_heap_insert(Relation rel, PgStat_Counter n)
                                428                 :                : {
 1604                           429   [ +  +  +  +  :       12311875 :     if (pgstat_should_count_relation(rel))
                                              +  + ]
                                430                 :                :     {
   13 michael@paquier.xyz       431                 :GNC    12103698 :         PgStat_RelationStatus *pgstat_info = rel->pgstat_info;
                                432                 :                : 
                                433         [ -  + ]:       12103698 :         Assert(pgstat_info->kind == PGSTAT_KIND_RELATION);
                                434                 :                : 
 1620 andres@anarazel.de        435                 :CBC    12103698 :         ensure_tabstat_xact_level(pgstat_info);
   13 michael@paquier.xyz       436                 :GNC    12103698 :         pgstat_info->tab.trans->tuples_inserted += n;
                                437                 :                :     }
 1620 andres@anarazel.de        438                 :CBC    12311875 : }
                                439                 :                : 
                                440                 :                : /*
                                441                 :                :  * count a tuple update
                                442                 :                :  */
                                443                 :                : void
 1253 pg@bowt.ie                444                 :        2382504 : pgstat_count_heap_update(Relation rel, bool hot, bool newpage)
                                445                 :                : {
                                446   [ +  +  -  + ]:        2382504 :     Assert(!(hot && newpage));
                                447                 :                : 
 1604 andres@anarazel.de        448   [ +  +  -  +  :        2382504 :     if (pgstat_should_count_relation(rel))
                                              +  + ]
                                449                 :                :     {
   13 michael@paquier.xyz       450                 :GNC     2382502 :         PgStat_RelationStatus *pgstat_info = rel->pgstat_info;
                                451                 :                : 
                                452         [ -  + ]:        2382502 :         Assert(pgstat_info->kind == PGSTAT_KIND_RELATION);
                                453                 :                : 
 1620 andres@anarazel.de        454                 :CBC     2382502 :         ensure_tabstat_xact_level(pgstat_info);
   13 michael@paquier.xyz       455                 :GNC     2382502 :         pgstat_info->tab.trans->tuples_updated++;
                                456                 :                : 
                                457                 :                :         /*
                                458                 :                :          * tuples_hot_updated and tuples_newpage_updated counters are
                                459                 :                :          * nontransactional, so just advance them
                                460                 :                :          */
 1620 andres@anarazel.de        461         [ +  + ]:CBC     2382502 :         if (hot)
   13 michael@paquier.xyz       462                 :GNC      167139 :             pgstat_info->tab.counts.tuples_hot_updated++;
 1253 pg@bowt.ie                463         [ +  + ]:CBC     2215363 :         else if (newpage)
   13 michael@paquier.xyz       464                 :GNC     2198994 :             pgstat_info->tab.counts.tuples_newpage_updated++;
                                465                 :                :     }
 1620 andres@anarazel.de        466                 :CBC     2382504 : }
                                467                 :                : 
                                468                 :                : /*
                                469                 :                :  * count a tuple deletion
                                470                 :                :  */
                                471                 :                : void
                                472                 :        1860794 : pgstat_count_heap_delete(Relation rel)
                                473                 :                : {
 1604                           474   [ -  +  -  -  :        1860794 :     if (pgstat_should_count_relation(rel))
                                              +  - ]
                                475                 :                :     {
   13 michael@paquier.xyz       476                 :GNC     1860794 :         PgStat_RelationStatus *pgstat_info = rel->pgstat_info;
                                477                 :                : 
                                478         [ -  + ]:        1860794 :         Assert(pgstat_info->kind == PGSTAT_KIND_RELATION);
                                479                 :                : 
 1620 andres@anarazel.de        480                 :CBC     1860794 :         ensure_tabstat_xact_level(pgstat_info);
   13 michael@paquier.xyz       481                 :GNC     1860794 :         pgstat_info->tab.trans->tuples_deleted++;
                                482                 :                :     }
 1620 andres@anarazel.de        483                 :CBC     1860794 : }
                                484                 :                : 
                                485                 :                : /*
                                486                 :                :  * update tuple counters due to truncate
                                487                 :                :  */
                                488                 :                : void
                                489                 :           2347 : pgstat_count_truncate(Relation rel)
                                490                 :                : {
 1604                           491   [ +  +  +  -  :           2347 :     if (pgstat_should_count_relation(rel))
                                              +  - ]
                                492                 :                :     {
   13 michael@paquier.xyz       493                 :GNC        2347 :         PgStat_RelationStatus *pgstat_info = rel->pgstat_info;
                                494                 :                : 
                                495         [ -  + ]:           2347 :         Assert(pgstat_info->kind == PGSTAT_KIND_RELATION);
                                496                 :                : 
 1620 andres@anarazel.de        497                 :CBC        2347 :         ensure_tabstat_xact_level(pgstat_info);
   13 michael@paquier.xyz       498                 :GNC        2347 :         save_truncdrop_counters(pgstat_info->tab.trans, false);
                                499                 :           2347 :         pgstat_info->tab.trans->tuples_inserted = 0;
                                500                 :           2347 :         pgstat_info->tab.trans->tuples_updated = 0;
                                501                 :           2347 :         pgstat_info->tab.trans->tuples_deleted = 0;
                                502                 :                :     }
 1620 andres@anarazel.de        503                 :CBC        2347 : }
                                504                 :                : 
                                505                 :                : /*
                                506                 :                :  * update dead-tuples count
                                507                 :                :  *
                                508                 :                :  * The semantics of this are that we are reporting the nontransactional
                                509                 :                :  * recovery of "delta" dead tuples; so delta_dead_tuples decreases
                                510                 :                :  * rather than increasing, and the change goes straight into the per-table
                                511                 :                :  * counter, not into transactional state.
                                512                 :                :  */
                                513                 :                : void
                                514                 :          21461 : pgstat_update_heap_dead_tuples(Relation rel, int delta)
                                515                 :                : {
 1604                           516   [ -  +  -  -  :          21461 :     if (pgstat_should_count_relation(rel))
                                              +  - ]
                                517                 :                :     {
   13 michael@paquier.xyz       518                 :GNC       21461 :         PgStat_RelationStatus *pgstat_info = rel->pgstat_info;
                                519                 :                : 
                                520         [ -  + ]:          21461 :         Assert(pgstat_info->kind == PGSTAT_KIND_RELATION);
                                521                 :                : 
                                522                 :          21461 :         pgstat_info->tab.counts.delta_dead_tuples -= delta;
                                523                 :                :     }
 1620 andres@anarazel.de        524                 :CBC       21461 : }
                                525                 :                : 
                                526                 :                : /*
                                527                 :                :  * Support function for the SQL-callable pgstat* functions. Returns
                                528                 :                :  * the collected statistics for one table or NULL. NULL doesn't mean
                                529                 :                :  * that the table doesn't exist, just that there are no statistics, so the
                                530                 :                :  * caller is better off to report ZERO instead.
                                531                 :                :  */
                                532                 :                : PgStat_StatTabEntry *
 1604                           533                 :           6576 : pgstat_fetch_stat_tabentry(Oid relid)
                                534                 :                : {
  140 nathan@postgresql.or      535                 :           6576 :     return pgstat_fetch_stat_tabentry_ext(IsSharedRelation(relid), relid, NULL);
                                536                 :                : }
                                537                 :                : 
                                538                 :                : /*
                                539                 :                :  * More efficient version of pgstat_fetch_stat_tabentry(), allowing to specify
                                540                 :                :  * whether the to-be-accessed table is a shared relation or not.  This version
                                541                 :                :  * also returns whether the caller can pfree() the result if desired.
                                542                 :                :  */
                                543                 :                : PgStat_StatTabEntry *
                                544                 :          38107 : pgstat_fetch_stat_tabentry_ext(bool shared, Oid reloid, bool *may_free)
                                545                 :                : {
 1604 andres@anarazel.de        546         [ +  + ]:          38107 :     Oid         dboid = (shared ? InvalidOid : MyDatabaseId);
                                547                 :                : 
                                548                 :          38107 :     return (PgStat_StatTabEntry *)
  140 nathan@postgresql.or      549                 :          38107 :         pgstat_fetch_entry(PGSTAT_KIND_RELATION, dboid, reloid, may_free);
                                550                 :                : }
                                551                 :                : 
                                552                 :                : /*
                                553                 :                :  * find any existing PgStat_RelationStatus entry for rel and kind
                                554                 :                :  *
                                555                 :                :  * Find any existing PgStat_RelationStatus entry for rel_id in the current
                                556                 :                :  * database. If not found, try finding from shared tables.
                                557                 :                :  *
                                558                 :                :  * If an entry is found, copy it.  For a PGSTAT_KIND_INDEX entry, just return
                                559                 :                :  * the copy.  For a PGSTAT_KIND_RELATION entry, increment the copy's counters
                                560                 :                :  * with their subtransaction counterparts, then return the copy.  The caller
                                561                 :                :  * may need to pfree() the copy.
                                562                 :                :  *
                                563                 :                :  * If no entry found, return NULL, don't create a new one.
                                564                 :                :  */
                                565                 :                : PgStat_RelationStatus *
   13 michael@paquier.xyz       566                 :GNC          32 : find_relstat_entry_kind(PgStat_Kind kind, Oid rel_id)
                                567                 :                : {
                                568                 :                :     PgStat_EntryRef *entry_ref;
                                569                 :                :     PgStat_TableXactStatus *trans;
                                570                 :             32 :     PgStat_RelationStatus *relentry = NULL;
                                571                 :             32 :     PgStat_RelationStatus *relstatus = NULL;
                                572                 :                : 
   15                           573                 :             32 :     entry_ref = pgstat_fetch_pending_entry(kind, MyDatabaseId, rel_id);
 1604 andres@anarazel.de        574         [ +  + ]:CBC          32 :     if (!entry_ref)
                                575                 :                :     {
   15 michael@paquier.xyz       576                 :GNC           8 :         entry_ref = pgstat_fetch_pending_entry(kind, InvalidOid, rel_id);
 1032 michael@paquier.xyz       577         [ +  - ]:CBC           8 :         if (!entry_ref)
   13 michael@paquier.xyz       578                 :GNC           8 :             return relstatus;
                                579                 :                :     }
                                580                 :                : 
                                581                 :             24 :     relentry = (PgStat_RelationStatus *) entry_ref->pending;
                                582                 :             24 :     relstatus = palloc_object(PgStat_RelationStatus);
                                583                 :             24 :     *relstatus = *relentry;
                                584                 :                : 
                                585                 :                :     /*
                                586                 :                :      * For index entries, just return the copy.  There is no transactional
                                587                 :                :      * data.
                                588                 :                :      */
                                589         [ -  + ]:             24 :     if (kind == PGSTAT_KIND_INDEX)
   13 michael@paquier.xyz       590                 :UNC           0 :         return relstatus;
                                591                 :                : 
                                592                 :                :     /*
                                593                 :                :      * Reset relstatus->tab.trans in the copy of PgStat_RelationStatus as it
                                594                 :                :      * may point to a shared memory area.  Its data is saved below, so
                                595                 :                :      * removing it does not matter.
                                596                 :                :      */
   13 michael@paquier.xyz       597                 :GNC          24 :     relstatus->tab.trans = NULL;
                                598                 :                : 
                                599                 :                :     /*
                                600                 :                :      * Live subtransaction counts are not included yet.  This is not a hot
                                601                 :                :      * code path so reconcile tuples_inserted, tuples_updated and
                                602                 :                :      * tuples_deleted even if the caller may not be interested in this data.
                                603                 :                :      */
                                604         [ +  + ]:             56 :     for (trans = relentry->tab.trans; trans != NULL; trans = trans->upper)
                                605                 :                :     {
                                606                 :             32 :         relstatus->tab.counts.tuples_inserted += trans->tuples_inserted;
                                607                 :             32 :         relstatus->tab.counts.tuples_updated += trans->tuples_updated;
                                608                 :             32 :         relstatus->tab.counts.tuples_deleted += trans->tuples_deleted;
                                609                 :                :     }
                                610                 :                : 
                                611                 :             24 :     return relstatus;
                                612                 :                : }
                                613                 :                : 
                                614                 :                : /*
                                615                 :                :  * Perform relation stats specific end-of-transaction work. Helper for
                                616                 :                :  * AtEOXact_PgStat.
                                617                 :                :  *
                                618                 :                :  * Transfer transactional insert/update counts into the base relstat entries.
                                619                 :                :  * We don't bother to free any of the transactional state, since it's all in
                                620                 :                :  * TopTransactionContext and will go away anyway.
                                621                 :                :  */
                                622                 :                : void
 1620 andres@anarazel.de        623                 :CBC      157283 : AtEOXact_PgStat_Relations(PgStat_SubXactStatus *xact_state, bool isCommit)
                                624                 :                : {
                                625                 :                :     PgStat_TableXactStatus *trans;
                                626                 :                : 
                                627         [ +  + ]:         607529 :     for (trans = xact_state->first; trans != NULL; trans = trans->next)
                                628                 :                :     {
                                629                 :                :         PgStat_RelationStatus *relstat;
                                630                 :                : 
                                631         [ -  + ]:         450246 :         Assert(trans->nest_level == 1);
                                632         [ -  + ]:         450246 :         Assert(trans->upper == NULL);
   13 michael@paquier.xyz       633                 :GNC      450246 :         relstat = trans->parent;
                                634         [ -  + ]:         450246 :         Assert(relstat->tab.trans == trans);
                                635                 :                :         /* restore pre-truncate/drop stats (if any) in case of aborted xact */
 1620 andres@anarazel.de        636         [ +  + ]:CBC      450246 :         if (!isCommit)
 1604                           637                 :          16615 :             restore_truncdrop_counters(trans);
                                638                 :                :         /* count attempted actions regardless of commit/abort */
   13 michael@paquier.xyz       639                 :GNC      450246 :         relstat->tab.counts.tuples_inserted += trans->tuples_inserted;
                                640                 :         450246 :         relstat->tab.counts.tuples_updated += trans->tuples_updated;
                                641                 :         450246 :         relstat->tab.counts.tuples_deleted += trans->tuples_deleted;
 1620 andres@anarazel.de        642         [ +  + ]:CBC      450246 :         if (isCommit)
                                643                 :                :         {
   13 michael@paquier.xyz       644                 :GNC      433631 :             relstat->tab.counts.truncdropped = trans->truncdropped;
 1620 andres@anarazel.de        645         [ +  + ]:CBC      433631 :             if (trans->truncdropped)
                                646                 :                :             {
                                647                 :                :                 /* forget live/dead stats seen by backend thus far */
   13 michael@paquier.xyz       648                 :GNC        2943 :                 relstat->tab.counts.delta_live_tuples = 0;
                                649                 :           2943 :                 relstat->tab.counts.delta_dead_tuples = 0;
                                650                 :                :             }
                                651                 :                :             /* insert adds a live tuple, delete removes one */
                                652                 :         433631 :             relstat->tab.counts.delta_live_tuples +=
 1620 andres@anarazel.de        653                 :CBC      433631 :                 trans->tuples_inserted - trans->tuples_deleted;
                                654                 :                :             /* update and delete each create a dead tuple */
   13 michael@paquier.xyz       655                 :GNC      433631 :             relstat->tab.counts.delta_dead_tuples +=
 1620 andres@anarazel.de        656                 :CBC      433631 :                 trans->tuples_updated + trans->tuples_deleted;
                                657                 :                :             /* insert, update, delete each count as one change event */
   13 michael@paquier.xyz       658                 :GNC      433631 :             relstat->tab.counts.changed_tuples +=
 1620 andres@anarazel.de        659                 :CBC      433631 :                 trans->tuples_inserted + trans->tuples_updated +
                                660                 :         433631 :                 trans->tuples_deleted;
                                661                 :                :         }
                                662                 :                :         else
                                663                 :                :         {
                                664                 :                :             /* inserted tuples are dead, deleted tuples are unaffected */
   13 michael@paquier.xyz       665                 :GNC       16615 :             relstat->tab.counts.delta_dead_tuples +=
 1620 andres@anarazel.de        666                 :CBC       16615 :                 trans->tuples_inserted + trans->tuples_updated;
                                667                 :                :             /* an aborted xact generates no changed_tuple events */
                                668                 :                :         }
   13 michael@paquier.xyz       669                 :GNC      450246 :         relstat->tab.trans = NULL;
                                670                 :                :     }
 1620 andres@anarazel.de        671                 :CBC      157283 : }
                                672                 :                : 
                                673                 :                : /*
                                674                 :                :  * Perform relation stats specific end-of-sub-transaction work. Helper for
                                675                 :                :  * AtEOSubXact_PgStat.
                                676                 :                :  *
                                677                 :                :  * Transfer transactional insert/update counts into the next higher
                                678                 :                :  * subtransaction state.
                                679                 :                :  */
                                680                 :                : void
                                681                 :          16197 : AtEOSubXact_PgStat_Relations(PgStat_SubXactStatus *xact_state, bool isCommit, int nestDepth)
                                682                 :                : {
                                683                 :                :     PgStat_TableXactStatus *trans;
                                684                 :                :     PgStat_TableXactStatus *next_trans;
                                685                 :                : 
                                686         [ +  + ]:          32872 :     for (trans = xact_state->first; trans != NULL; trans = next_trans)
                                687                 :                :     {
                                688                 :                :         PgStat_RelationStatus *relstat;
                                689                 :                : 
                                690                 :          16675 :         next_trans = trans->next;
                                691         [ -  + ]:          16675 :         Assert(trans->nest_level == nestDepth);
   13 michael@paquier.xyz       692                 :GNC       16675 :         relstat = trans->parent;
                                693         [ -  + ]:          16675 :         Assert(relstat->tab.trans == trans);
                                694                 :                : 
 1620 andres@anarazel.de        695         [ +  + ]:CBC       16675 :         if (isCommit)
                                696                 :                :         {
                                697   [ +  +  +  + ]:          15620 :             if (trans->upper && trans->upper->nest_level == nestDepth - 1)
                                698                 :                :             {
                                699         [ +  + ]:          14408 :                 if (trans->truncdropped)
                                700                 :                :                 {
                                701                 :                :                     /* propagate the truncate/drop status one level up */
 1604                           702                 :             16 :                     save_truncdrop_counters(trans->upper, false);
                                703                 :                :                     /* replace upper xact stats with ours */
 1620                           704                 :             16 :                     trans->upper->tuples_inserted = trans->tuples_inserted;
                                705                 :             16 :                     trans->upper->tuples_updated = trans->tuples_updated;
                                706                 :             16 :                     trans->upper->tuples_deleted = trans->tuples_deleted;
                                707                 :                :                 }
                                708                 :                :                 else
                                709                 :                :                 {
                                710                 :          14392 :                     trans->upper->tuples_inserted += trans->tuples_inserted;
                                711                 :          14392 :                     trans->upper->tuples_updated += trans->tuples_updated;
                                712                 :          14392 :                     trans->upper->tuples_deleted += trans->tuples_deleted;
                                713                 :                :                 }
   13 michael@paquier.xyz       714                 :GNC       14408 :                 relstat->tab.trans = trans->upper;
 1620 andres@anarazel.de        715                 :CBC       14408 :                 pfree(trans);
                                716                 :                :             }
                                717                 :                :             else
                                718                 :                :             {
                                719                 :                :                 /*
                                720                 :                :                  * When there isn't an immediate parent state, we can just
                                721                 :                :                  * reuse the record instead of going through a palloc/pfree
                                722                 :                :                  * pushup (this works since it's all in TopTransactionContext
                                723                 :                :                  * anyway).  We have to re-link it into the parent level,
                                724                 :                :                  * though, and that might mean pushing a new entry into the
                                725                 :                :                  * pgStatXactStack.
                                726                 :                :                  */
                                727                 :                :                 PgStat_SubXactStatus *upper_xact_state;
                                728                 :                : 
 1604                           729                 :           1212 :                 upper_xact_state = pgstat_get_xact_stack_level(nestDepth - 1);
 1620                           730                 :           1212 :                 trans->next = upper_xact_state->first;
                                731                 :           1212 :                 upper_xact_state->first = trans;
                                732                 :           1212 :                 trans->nest_level = nestDepth - 1;
                                733                 :                :             }
                                734                 :                :         }
                                735                 :                :         else
                                736                 :                :         {
                                737                 :                :             /*
                                738                 :                :              * On abort, update top-level relstat counts, then forget the
                                739                 :                :              * subtransaction
                                740                 :                :              */
                                741                 :                : 
                                742                 :                :             /* first restore values obliterated by truncate/drop */
 1604                           743                 :           1055 :             restore_truncdrop_counters(trans);
                                744                 :                :             /* count attempted actions regardless of commit/abort */
   13 michael@paquier.xyz       745                 :GNC        1055 :             relstat->tab.counts.tuples_inserted += trans->tuples_inserted;
                                746                 :           1055 :             relstat->tab.counts.tuples_updated += trans->tuples_updated;
                                747                 :           1055 :             relstat->tab.counts.tuples_deleted += trans->tuples_deleted;
                                748                 :                :             /* inserted tuples are dead, deleted tuples are unaffected */
                                749                 :           1055 :             relstat->tab.counts.delta_dead_tuples +=
 1620 andres@anarazel.de        750                 :CBC        1055 :                 trans->tuples_inserted + trans->tuples_updated;
   13 michael@paquier.xyz       751                 :GNC        1055 :             relstat->tab.trans = trans->upper;
 1620 andres@anarazel.de        752                 :CBC        1055 :             pfree(trans);
                                753                 :                :         }
                                754                 :                :     }
                                755                 :          16197 : }
                                756                 :                : 
                                757                 :                : /*
                                758                 :                :  * Generate 2PC records for all the pending transaction-dependent relation
                                759                 :                :  * stats.
                                760                 :                :  */
                                761                 :                : void
                                762                 :            318 : AtPrepare_PgStat_Relations(PgStat_SubXactStatus *xact_state)
                                763                 :                : {
                                764                 :                :     PgStat_TableXactStatus *trans;
                                765                 :                : 
                                766         [ +  + ]:            768 :     for (trans = xact_state->first; trans != NULL; trans = trans->next)
                                767                 :                :     {
                                768                 :                :         PgStat_RelationStatus *relstat PG_USED_FOR_ASSERTS_ONLY;
                                769                 :                :         TwoPhasePgStatRecord record;
                                770                 :                : 
                                771         [ -  + ]:            450 :         Assert(trans->nest_level == 1);
                                772         [ -  + ]:            450 :         Assert(trans->upper == NULL);
   13 michael@paquier.xyz       773                 :GNC         450 :         relstat = trans->parent;
                                774         [ -  + ]:            450 :         Assert(relstat->tab.trans == trans);
                                775                 :                : 
 1620 andres@anarazel.de        776                 :CBC         450 :         record.tuples_inserted = trans->tuples_inserted;
                                777                 :            450 :         record.tuples_updated = trans->tuples_updated;
                                778                 :            450 :         record.tuples_deleted = trans->tuples_deleted;
                                779                 :            450 :         record.inserted_pre_truncdrop = trans->inserted_pre_truncdrop;
                                780                 :            450 :         record.updated_pre_truncdrop = trans->updated_pre_truncdrop;
                                781                 :            450 :         record.deleted_pre_truncdrop = trans->deleted_pre_truncdrop;
   13 michael@paquier.xyz       782                 :GNC         450 :         record.id = relstat->tab.id;
                                783                 :            450 :         record.shared = relstat->tab.shared;
 1252 michael@paquier.xyz       784                 :CBC         450 :         record.truncdropped = trans->truncdropped;
                                785                 :                : 
 1620 andres@anarazel.de        786                 :            450 :         RegisterTwoPhaseRecord(TWOPHASE_RM_PGSTAT_ID, 0,
                                787                 :                :                                &record, sizeof(TwoPhasePgStatRecord));
                                788                 :                :     }
                                789                 :            318 : }
                                790                 :                : 
                                791                 :                : /*
                                792                 :                :  * All we need do here is unlink the transaction stats state from the
                                793                 :                :  * nontransactional state.  The nontransactional action counts will be
                                794                 :                :  * reported to the stats system immediately, while the effects on live and
                                795                 :                :  * dead tuple counts are preserved in the 2PC state file.
                                796                 :                :  *
                                797                 :                :  * Note: AtEOXact_PgStat_Relations is not called during PREPARE.
                                798                 :                :  */
                                799                 :                : void
                                800                 :            318 : PostPrepare_PgStat_Relations(PgStat_SubXactStatus *xact_state)
                                801                 :                : {
                                802                 :                :     PgStat_TableXactStatus *trans;
                                803                 :                : 
                                804         [ +  + ]:            768 :     for (trans = xact_state->first; trans != NULL; trans = trans->next)
                                805                 :                :     {
                                806                 :                :         PgStat_RelationStatus *relstat;
                                807                 :                : 
   13 michael@paquier.xyz       808                 :GNC         450 :         relstat = trans->parent;
                                809                 :            450 :         relstat->tab.trans = NULL;
                                810                 :                :     }
 1620 andres@anarazel.de        811                 :CBC         318 : }
                                812                 :                : 
                                813                 :                : /*
                                814                 :                :  * 2PC processing routine for COMMIT PREPARED case.
                                815                 :                :  *
                                816                 :                :  * Load the saved counts into our local pgstats state.
                                817                 :                :  */
                                818                 :                : void
  416 michael@paquier.xyz       819                 :            376 : pgstat_twophase_postcommit(FullTransactionId fxid, uint16 info,
                                820                 :                :                            void *recdata, uint32 len)
                                821                 :                : {
 1620 andres@anarazel.de        822                 :            376 :     TwoPhasePgStatRecord *rec = (TwoPhasePgStatRecord *) recdata;
                                823                 :                :     PgStat_RelationStatus *pgstat_info;
                                824                 :                : 
                                825                 :                :     /* Find or create a relstat entry for the rel */
   15 michael@paquier.xyz       826                 :GNC         376 :     pgstat_info = pgstat_prep_relation_pending(PGSTAT_KIND_RELATION, rec->id, rec->shared);
                                827                 :                : 
                                828                 :                :     /* Same math as in AtEOXact_PgStat, commit case */
   13                           829                 :            376 :     pgstat_info->tab.counts.tuples_inserted += rec->tuples_inserted;
                                830                 :            376 :     pgstat_info->tab.counts.tuples_updated += rec->tuples_updated;
                                831                 :            376 :     pgstat_info->tab.counts.tuples_deleted += rec->tuples_deleted;
                                832                 :            376 :     pgstat_info->tab.counts.truncdropped = rec->truncdropped;
 1252 michael@paquier.xyz       833         [ +  + ]:CBC         376 :     if (rec->truncdropped)
                                834                 :                :     {
                                835                 :                :         /* forget live/dead stats seen by backend thus far */
   13 michael@paquier.xyz       836                 :GNC          12 :         pgstat_info->tab.counts.delta_live_tuples = 0;
                                837                 :             12 :         pgstat_info->tab.counts.delta_dead_tuples = 0;
                                838                 :                :     }
                                839                 :            376 :     pgstat_info->tab.counts.delta_live_tuples +=
 1620 andres@anarazel.de        840                 :CBC         376 :         rec->tuples_inserted - rec->tuples_deleted;
   13 michael@paquier.xyz       841                 :GNC         376 :     pgstat_info->tab.counts.delta_dead_tuples +=
 1620 andres@anarazel.de        842                 :CBC         376 :         rec->tuples_updated + rec->tuples_deleted;
   13 michael@paquier.xyz       843                 :GNC         376 :     pgstat_info->tab.counts.changed_tuples +=
 1620 andres@anarazel.de        844                 :CBC         376 :         rec->tuples_inserted + rec->tuples_updated +
                                845                 :            376 :         rec->tuples_deleted;
                                846                 :            376 : }
                                847                 :                : 
                                848                 :                : /*
                                849                 :                :  * 2PC processing routine for ROLLBACK PREPARED case.
                                850                 :                :  *
                                851                 :                :  * Load the saved counts into our local pgstats state, but treat them
                                852                 :                :  * as aborted.
                                853                 :                :  */
                                854                 :                : void
  416 michael@paquier.xyz       855                 :             85 : pgstat_twophase_postabort(FullTransactionId fxid, uint16 info,
                                856                 :                :                           void *recdata, uint32 len)
                                857                 :                : {
 1620 andres@anarazel.de        858                 :             85 :     TwoPhasePgStatRecord *rec = (TwoPhasePgStatRecord *) recdata;
                                859                 :                :     PgStat_RelationStatus *pgstat_info;
                                860                 :                : 
                                861                 :                :     /* Find or create a relstat entry for the rel */
   15 michael@paquier.xyz       862                 :GNC          85 :     pgstat_info = pgstat_prep_relation_pending(PGSTAT_KIND_RELATION, rec->id, rec->shared);
                                863                 :                : 
                                864                 :                :     /* Same math as in AtEOXact_PgStat, abort case */
 1252 michael@paquier.xyz       865         [ +  + ]:CBC          85 :     if (rec->truncdropped)
                                866                 :                :     {
 1620 andres@anarazel.de        867                 :              8 :         rec->tuples_inserted = rec->inserted_pre_truncdrop;
                                868                 :              8 :         rec->tuples_updated = rec->updated_pre_truncdrop;
                                869                 :              8 :         rec->tuples_deleted = rec->deleted_pre_truncdrop;
                                870                 :                :     }
   13 michael@paquier.xyz       871                 :GNC          85 :     pgstat_info->tab.counts.tuples_inserted += rec->tuples_inserted;
                                872                 :             85 :     pgstat_info->tab.counts.tuples_updated += rec->tuples_updated;
                                873                 :             85 :     pgstat_info->tab.counts.tuples_deleted += rec->tuples_deleted;
                                874                 :             85 :     pgstat_info->tab.counts.delta_dead_tuples +=
 1620 andres@anarazel.de        875                 :CBC          85 :         rec->tuples_inserted + rec->tuples_updated;
                                876                 :             85 : }
                                877                 :                : 
                                878                 :                : /*
                                879                 :                :  * Flush out pending stats for the entry
                                880                 :                :  *
                                881                 :                :  * If nowait is true and the lock could not be immediately acquired, returns
                                882                 :                :  * false without flushing the entry.  Otherwise returns true.
                                883                 :                :  *
                                884                 :                :  * Some of the stats are copied to the corresponding pending database stats
                                885                 :                :  * entry when successfully flushing.
                                886                 :                :  */
                                887                 :                : bool
 1604                           888                 :         444116 : pgstat_relation_flush_cb(PgStat_EntryRef *entry_ref, bool nowait)
                                889                 :                : {
                                890                 :                :     Oid         dboid;
                                891                 :                :     PgStat_RelationStatus *lstats;  /* pending stats entry  */
                                892                 :                :     PgStatShared_Relation *shtabstats;
                                893                 :                :     PgStat_StatTabEntry *tabentry;  /* table entry of shared stats */
                                894                 :                :     PgStat_StatDBEntry *dbentry;    /* pending database entry */
                                895                 :                : 
                                896                 :         444116 :     dboid = entry_ref->shared_entry->key.dboid;
   13 michael@paquier.xyz       897                 :GNC      444116 :     lstats = (PgStat_RelationStatus *) entry_ref->pending;
 1604 andres@anarazel.de        898                 :CBC      444116 :     shtabstats = (PgStatShared_Relation *) entry_ref->shared_stats;
                                899                 :                : 
                                900                 :                :     /* ignore entries that didn't accumulate any actual counts */
   13 michael@paquier.xyz       901         [ +  + ]:GNC      444116 :     if (pg_memory_is_all_zeros(&lstats->tab.counts,
                                902                 :                :                                sizeof(struct PgStat_TableCounts)))
 1604 andres@anarazel.de        903                 :CBC        3642 :         return true;
                                904                 :                : 
                                905         [ +  + ]:         440474 :     if (!pgstat_lock_entry(entry_ref, nowait))
                                906                 :              2 :         return false;
                                907                 :                : 
                                908                 :                :     /* add the values to the shared entry. */
                                909                 :         440472 :     tabentry = &shtabstats->stats;
                                910                 :                : 
   13 michael@paquier.xyz       911                 :GNC      440472 :     tabentry->numscans += lstats->tab.counts.numscans;
                                912         [ +  + ]:         440472 :     if (lstats->tab.counts.numscans)
                                913                 :                :     {
 1413 andres@anarazel.de        914                 :CBC      103383 :         TimestampTz t = GetCurrentTransactionStopTimestamp();
                                915                 :                : 
                                916         [ +  + ]:         103383 :         if (t > tabentry->lastscan)
                                917                 :         102633 :             tabentry->lastscan = t;
                                918                 :                :     }
   13 michael@paquier.xyz       919                 :GNC      440472 :     tabentry->tuples_returned += lstats->tab.counts.tuples_returned;
                                920                 :         440472 :     tabentry->tuples_fetched += lstats->tab.counts.tuples_fetched;
                                921                 :         440472 :     tabentry->tuples_inserted += lstats->tab.counts.tuples_inserted;
                                922                 :         440472 :     tabentry->tuples_updated += lstats->tab.counts.tuples_updated;
                                923                 :         440472 :     tabentry->tuples_deleted += lstats->tab.counts.tuples_deleted;
                                924                 :         440472 :     tabentry->tuples_hot_updated += lstats->tab.counts.tuples_hot_updated;
                                925                 :         440472 :     tabentry->tuples_newpage_updated += lstats->tab.counts.tuples_newpage_updated;
                                926                 :                : 
                                927                 :                :     /*
                                928                 :                :      * If table was truncated/dropped, first reset the live/dead counters.
                                929                 :                :      */
                                930         [ +  + ]:         440472 :     if (lstats->tab.counts.truncdropped)
                                931                 :                :     {
 1360 michael@paquier.xyz       932                 :CBC         601 :         tabentry->live_tuples = 0;
                                933                 :            601 :         tabentry->dead_tuples = 0;
                                934                 :            601 :         tabentry->ins_since_vacuum = 0;
                                935                 :                :     }
                                936                 :                : 
   13 michael@paquier.xyz       937                 :GNC      440472 :     tabentry->live_tuples += lstats->tab.counts.delta_live_tuples;
                                938                 :         440472 :     tabentry->dead_tuples += lstats->tab.counts.delta_dead_tuples;
                                939                 :         440472 :     tabentry->mod_since_analyze += lstats->tab.counts.changed_tuples;
                                940                 :                : 
                                941                 :                :     /*
                                942                 :                :      * Using tuples_inserted to update ins_since_vacuum does mean that we'll
                                943                 :                :      * track aborted inserts too.  This isn't ideal, but otherwise probably
                                944                 :                :      * not worth adding an extra field for.  It may just amount to autovacuums
                                945                 :                :      * triggering for inserts more often than they maybe should, which is
                                946                 :                :      * probably not going to be common enough to be too concerned about here.
                                947                 :                :      */
                                948                 :         440472 :     tabentry->ins_since_vacuum += lstats->tab.counts.tuples_inserted;
                                949                 :                : 
                                950                 :         440472 :     tabentry->blocks_fetched += lstats->tab.counts.blocks_fetched;
                                951                 :         440472 :     tabentry->blocks_hit += lstats->tab.counts.blocks_hit;
                                952                 :                : 
                                953                 :                :     /* Clamp live_tuples in case of negative delta_live_tuples */
 1360 michael@paquier.xyz       954                 :CBC      440472 :     tabentry->live_tuples = Max(tabentry->live_tuples, 0);
                                955                 :                :     /* Likewise for dead_tuples */
                                956                 :         440472 :     tabentry->dead_tuples = Max(tabentry->dead_tuples, 0);
                                957                 :                : 
 1604 andres@anarazel.de        958                 :         440472 :     pgstat_unlock_entry(entry_ref);
                                959                 :                : 
                                960                 :                :     /* The entry was successfully flushed, add the same to database stats */
                                961                 :         440472 :     dbentry = pgstat_prep_database_pending(dboid);
   13 michael@paquier.xyz       962                 :GNC      440472 :     dbentry->tuples_returned += lstats->tab.counts.tuples_returned;
                                963                 :         440472 :     dbentry->tuples_fetched += lstats->tab.counts.tuples_fetched;
                                964                 :         440472 :     dbentry->tuples_inserted += lstats->tab.counts.tuples_inserted;
                                965                 :         440472 :     dbentry->tuples_updated += lstats->tab.counts.tuples_updated;
                                966                 :         440472 :     dbentry->tuples_deleted += lstats->tab.counts.tuples_deleted;
                                967                 :         440472 :     dbentry->blocks_fetched += lstats->tab.counts.blocks_fetched;
                                968                 :         440472 :     dbentry->blocks_hit += lstats->tab.counts.blocks_hit;
                                969                 :                : 
 1604 andres@anarazel.de        970                 :CBC      440472 :     return true;
                                971                 :                : }
                                972                 :                : 
                                973                 :                : void
                                974                 :         473519 : pgstat_relation_delete_pending_cb(PgStat_EntryRef *entry_ref)
                                975                 :                : {
   13 michael@paquier.xyz       976                 :GNC      473519 :     PgStat_RelationStatus *pending = (PgStat_RelationStatus *) entry_ref->pending;
                                977                 :                : 
 1604 andres@anarazel.de        978         [ +  + ]:CBC      473519 :     if (pending->relation)
                                979                 :         420292 :         pgstat_unlink_relation(pending->relation);
 1620                           980                 :         473519 : }
                                981                 :                : 
                                982                 :                : void
  325 michael@paquier.xyz       983                 :           8092 : pgstat_relation_reset_timestamp_cb(PgStatShared_Common *header, TimestampTz ts)
                                984                 :                : {
                                985                 :           8092 :     ((PgStatShared_Relation *) header)->stats.stat_reset_time = ts;
                                986                 :           8092 : }
                                987                 :                : 
                                988                 :                : /*
                                989                 :                :  * Find or create a PgStat_RelationStatus entry for rel. New entry is created and
                                990                 :                :  * initialized if not exists.
                                991                 :                :  */
                                992                 :                : static PgStat_RelationStatus *
   15 michael@paquier.xyz       993                 :GNC     1166871 : pgstat_prep_relation_pending(PgStat_Kind kind, Oid rel_id, bool isshared)
                                994                 :                : {
                                995                 :                :     PgStat_EntryRef *entry_ref;
                                996                 :                :     PgStat_RelationStatus *pending;
                                997                 :                : 
                                998         [ +  + ]:        1166871 :     entry_ref = pgstat_prep_pending_entry(kind,
                                999                 :                :                                           isshared ? InvalidOid : MyDatabaseId,
                               1000                 :                :                                           rel_id, NULL);
 1604 andres@anarazel.de       1001                 :CBC     1166871 :     pending = entry_ref->pending;
   13 michael@paquier.xyz      1002                 :GNC     1166871 :     pending->kind = kind;
                               1003         [ +  + ]:        1166871 :     if (kind != PGSTAT_KIND_INDEX)
                               1004                 :                :     {
                               1005                 :         516241 :         pending->tab.id = rel_id;
                               1006                 :         516241 :         pending->tab.shared = isshared;
                               1007                 :                :     }
                               1008                 :                : 
 1604 andres@anarazel.de       1009                 :CBC     1166871 :     return pending;
                               1010                 :                : }
                               1011                 :                : 
                               1012                 :                : /*
                               1013                 :                :  * add a new (sub)transaction state record
                               1014                 :                :  */
                               1015                 :                : static void
   13 michael@paquier.xyz      1016                 :GNC      466159 : add_tabstat_xact_level(PgStat_RelationStatus *pgstat_info, int nest_level)
                               1017                 :                : {
                               1018                 :                :     PgStat_SubXactStatus *xact_state;
                               1019                 :                :     PgStat_TableXactStatus *trans;
                               1020                 :                : 
                               1021                 :                :     /*
                               1022                 :                :      * If this is the first rel to be modified at the current nest level, we
                               1023                 :                :      * first have to push a transaction stack entry.
                               1024                 :                :      */
 1604 andres@anarazel.de       1025                 :CBC      466159 :     xact_state = pgstat_get_xact_stack_level(nest_level);
                               1026                 :                : 
                               1027                 :                :     /* Now make a per-table stack entry */
                               1028                 :                :     trans = (PgStat_TableXactStatus *)
 1620                          1029                 :         466159 :         MemoryContextAllocZero(TopTransactionContext,
                               1030                 :                :                                sizeof(PgStat_TableXactStatus));
                               1031                 :         466159 :     trans->nest_level = nest_level;
   13 michael@paquier.xyz      1032                 :GNC      466159 :     trans->upper = pgstat_info->tab.trans;
 1620 andres@anarazel.de       1033                 :CBC      466159 :     trans->parent = pgstat_info;
                               1034                 :         466159 :     trans->next = xact_state->first;
                               1035                 :         466159 :     xact_state->first = trans;
   13 michael@paquier.xyz      1036                 :GNC      466159 :     pgstat_info->tab.trans = trans;
 1620 andres@anarazel.de       1037                 :CBC      466159 : }
                               1038                 :                : 
                               1039                 :                : /*
                               1040                 :                :  * Add a new (sub)transaction record if needed.
                               1041                 :                :  */
                               1042                 :                : static void
   13 michael@paquier.xyz      1043                 :GNC    16349341 : ensure_tabstat_xact_level(PgStat_RelationStatus *pgstat_info)
                               1044                 :                : {
 1620 andres@anarazel.de       1045                 :CBC    16349341 :     int         nest_level = GetCurrentTransactionNestLevel();
                               1046                 :                : 
   13 michael@paquier.xyz      1047         [ +  + ]:GNC    16349341 :     if (pgstat_info->tab.trans == NULL ||
                               1048         [ +  + ]:       15898375 :         pgstat_info->tab.trans->nest_level != nest_level)
 1620 andres@anarazel.de       1049                 :CBC      466159 :         add_tabstat_xact_level(pgstat_info, nest_level);
                               1050                 :       16349341 : }
                               1051                 :                : 
                               1052                 :                : /*
                               1053                 :                :  * Whenever a table is truncated/dropped, we save its i/u/d counters so that
                               1054                 :                :  * they can be cleared, and if the (sub)xact that executed the truncate/drop
                               1055                 :                :  * later aborts, the counters can be restored to the saved (pre-truncate/drop)
                               1056                 :                :  * values.
                               1057                 :                :  *
                               1058                 :                :  * Note that for truncate we do this on the first truncate in any particular
                               1059                 :                :  * subxact level only.
                               1060                 :                :  */
                               1061                 :                : static void
 1604                          1062                 :           3240 : save_truncdrop_counters(PgStat_TableXactStatus *trans, bool is_drop)
                               1063                 :                : {
 1620                          1064   [ +  +  +  + ]:           3240 :     if (!trans->truncdropped || is_drop)
                               1065                 :                :     {
                               1066                 :           3208 :         trans->inserted_pre_truncdrop = trans->tuples_inserted;
                               1067                 :           3208 :         trans->updated_pre_truncdrop = trans->tuples_updated;
                               1068                 :           3208 :         trans->deleted_pre_truncdrop = trans->tuples_deleted;
                               1069                 :           3208 :         trans->truncdropped = true;
                               1070                 :                :     }
                               1071                 :           3240 : }
                               1072                 :                : 
                               1073                 :                : /*
                               1074                 :                :  * restore counters when a truncate aborts
                               1075                 :                :  */
                               1076                 :                : static void
 1604                          1077                 :          17670 : restore_truncdrop_counters(PgStat_TableXactStatus *trans)
                               1078                 :                : {
 1620                          1079         [ +  + ]:          17670 :     if (trans->truncdropped)
                               1080                 :                :     {
                               1081                 :            219 :         trans->tuples_inserted = trans->inserted_pre_truncdrop;
                               1082                 :            219 :         trans->tuples_updated = trans->updated_pre_truncdrop;
                               1083                 :            219 :         trans->tuples_deleted = trans->deleted_pre_truncdrop;
                               1084                 :                :     }
                               1085                 :          17670 : }
        

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