LCOV - differential code coverage report
Current view: top level - src/backend/access/transam - xlogfuncs.c (source / functions) Coverage Total Hit UNC UBC GBC GNC CBC DUB DCB
Current: bed3ffbf9d952be6c7d739d068cdce44c046dfb7 vs 574581b50ac9c63dd9e4abebb731a3b67e5b50f6 Lines: 79.4 % 253 201 12 40 4 56 141 3 16
Current Date: 2026-05-05 10:23:31 +0900 Functions: 95.7 % 23 22 1 1 10 11
Baseline: lcov-20260505-025707-baseline Branches: 35.4 % 164 58 17 89 3 17 38 6 6
Baseline Date: 2026-05-05 10:27:06 +0900 Line coverage date bins:
Legend: Lines:     hit not hit
Branches: + taken - not taken # not executed
(7,30] days: 100.0 % 1 1 1
(30,360] days: 82.1 % 67 55 12 55
(360..) days: 78.4 % 185 145 40 4 141
Function coverage date bins:
(30,360] days: 100.0 % 2 2 2
(360..) days: 95.2 % 21 20 1 1 8 11
Branch coverage date bins:
(30,360] days: 50.0 % 34 17 17 17
(360..) days: 31.5 % 130 41 89 3 38

 Age         Owner                    Branch data    TLA  Line data    Source code
                                  1                 :                : /*-------------------------------------------------------------------------
                                  2                 :                :  *
                                  3                 :                :  * xlogfuncs.c
                                  4                 :                :  *
                                  5                 :                :  * PostgreSQL write-ahead log manager user interface functions
                                  6                 :                :  *
                                  7                 :                :  * This file contains WAL control and information functions.
                                  8                 :                :  *
                                  9                 :                :  *
                                 10                 :                :  * Portions Copyright (c) 1996-2026, PostgreSQL Global Development Group
                                 11                 :                :  * Portions Copyright (c) 1994, Regents of the University of California
                                 12                 :                :  *
                                 13                 :                :  * src/backend/access/transam/xlogfuncs.c
                                 14                 :                :  *
                                 15                 :                :  *-------------------------------------------------------------------------
                                 16                 :                :  */
                                 17                 :                : #include "postgres.h"
                                 18                 :                : 
                                 19                 :                : #include <unistd.h>
                                 20                 :                : 
                                 21                 :                : #include "access/htup_details.h"
                                 22                 :                : #include "access/xlog_internal.h"
                                 23                 :                : #include "access/xlogbackup.h"
                                 24                 :                : #include "access/xlogrecovery.h"
                                 25                 :                : #include "catalog/pg_authid.h"
                                 26                 :                : #include "catalog/pg_type.h"
                                 27                 :                : #include "funcapi.h"
                                 28                 :                : #include "miscadmin.h"
                                 29                 :                : #include "pgstat.h"
                                 30                 :                : #include "utils/acl.h"
                                 31                 :                : #include "replication/walreceiver.h"
                                 32                 :                : #include "storage/fd.h"
                                 33                 :                : #include "storage/latch.h"
                                 34                 :                : #include "storage/standby.h"
                                 35                 :                : #include "utils/builtins.h"
                                 36                 :                : #include "utils/memutils.h"
                                 37                 :                : #include "utils/pg_lsn.h"
                                 38                 :                : #include "utils/timestamp.h"
                                 39                 :                : #include "utils/wait_event.h"
                                 40                 :                : 
                                 41                 :                : /*
                                 42                 :                :  * Backup-related variables.
                                 43                 :                :  */
                                 44                 :                : static BackupState *backup_state = NULL;
                                 45                 :                : static StringInfo tablespace_map = NULL;
                                 46                 :                : 
                                 47                 :                : /* Session-level context for the SQL-callable backup functions */
                                 48                 :                : static MemoryContext backupcontext = NULL;
                                 49                 :                : 
                                 50                 :                : 
                                 51                 :                : /*
                                 52                 :                :  * Return a string constant representing the recovery pause state. This is
                                 53                 :                :  * used in system functions and views, and should *not* be translated.
                                 54                 :                :  */
                                 55                 :                : static const char *
   60 michael@paquier.xyz        56                 :GNC           9 : GetRecoveryPauseStateString(RecoveryPauseState pause_state)
                                 57                 :                : {
                                 58                 :              9 :     const char *statestr = NULL;
                                 59                 :                : 
                                 60   [ +  -  +  - ]:              9 :     switch (pause_state)
                                 61                 :                :     {
                                 62                 :              3 :         case RECOVERY_NOT_PAUSED:
                                 63                 :              3 :             statestr = "not paused";
                                 64                 :              3 :             break;
   60 michael@paquier.xyz        65                 :UNC           0 :         case RECOVERY_PAUSE_REQUESTED:
                                 66                 :              0 :             statestr = "pause requested";
                                 67                 :              0 :             break;
   60 michael@paquier.xyz        68                 :GNC           6 :         case RECOVERY_PAUSED:
                                 69                 :              6 :             statestr = "paused";
                                 70                 :              6 :             break;
                                 71                 :                :     }
                                 72                 :                : 
                                 73         [ -  + ]:              9 :     Assert(statestr != NULL);
                                 74                 :              9 :     return statestr;
                                 75                 :                : }
                                 76                 :                : 
                                 77                 :                : /*
                                 78                 :                :  * pg_backup_start: set up for taking an on-line backup dump
                                 79                 :                :  *
                                 80                 :                :  * Essentially what this does is to create the contents required for the
                                 81                 :                :  * backup_label file and the tablespace map.
                                 82                 :                :  *
                                 83                 :                :  * Permission checking for this function is managed through the normal
                                 84                 :                :  * GRANT system.
                                 85                 :                :  */
                                 86                 :                : Datum
 1490 sfrost@snowman.net         87                 :CBC           4 : pg_backup_start(PG_FUNCTION_ARGS)
                                 88                 :                : {
 3341 noah@leadboat.com          89                 :              4 :     text       *backupid = PG_GETARG_TEXT_PP(0);
 5296 simon@2ndQuadrant.co       90                 :              4 :     bool        fast = PG_GETARG_BOOL(1);
                                 91                 :                :     char       *backupidstr;
 3329 teodor@sigaev.ru           92                 :              4 :     SessionBackupState status = get_backup_status();
                                 93                 :                :     MemoryContext oldcontext;
                                 94                 :                : 
 5296 simon@2ndQuadrant.co       95                 :              4 :     backupidstr = text_to_cstring(backupid);
                                 96                 :                : 
 1490 sfrost@snowman.net         97         [ -  + ]:              4 :     if (status == SESSION_BACKUP_RUNNING)
 3682 magnus@hagander.net        98         [ #  # ]:UBC           0 :         ereport(ERROR,
                                 99                 :                :                 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                                100                 :                :                  errmsg("a backup is already in progress in this session")));
                                101                 :                : 
                                102                 :                :     /*
                                103                 :                :      * backup_state and tablespace_map need to be long-lived as they are used
                                104                 :                :      * in pg_backup_stop().  These are allocated in a dedicated memory context
                                105                 :                :      * child of TopMemoryContext, deleted at the end of pg_backup_stop().  If
                                106                 :                :      * an error happens before ending the backup, memory would be leaked in
                                107                 :                :      * this context until pg_backup_start() is called again.
                                108                 :                :      */
 1291 michael@paquier.xyz       109         [ +  - ]:CBC           4 :     if (backupcontext == NULL)
                                110                 :                :     {
                                111                 :              4 :         backupcontext = AllocSetContextCreate(TopMemoryContext,
                                112                 :                :                                               "on-line backup context",
                                113                 :                :                                               ALLOCSET_START_SMALL_SIZES);
                                114                 :                :     }
                                115                 :                :     else
                                116                 :                :     {
 1291 michael@paquier.xyz       117                 :UBC           0 :         backup_state = NULL;
 1317                           118                 :              0 :         tablespace_map = NULL;
 1291                           119                 :              0 :         MemoryContextReset(backupcontext);
                                120                 :                :     }
                                121                 :                : 
 1291 michael@paquier.xyz       122                 :CBC           4 :     oldcontext = MemoryContextSwitchTo(backupcontext);
  146 michael@paquier.xyz       123                 :GNC           4 :     backup_state = palloc0_object(BackupState);
 1317 michael@paquier.xyz       124                 :CBC           4 :     tablespace_map = makeStringInfo();
 1490 sfrost@snowman.net        125                 :              4 :     MemoryContextSwitchTo(oldcontext);
                                126                 :                : 
                                127                 :              4 :     register_persistent_abort_backup_handler();
 1317 michael@paquier.xyz       128                 :              4 :     do_pg_backup_start(backupidstr, fast, NULL, backup_state, tablespace_map);
                                129                 :                : 
                                130                 :              3 :     PG_RETURN_LSN(backup_state->startpoint);
                                131                 :                : }
                                132                 :                : 
                                133                 :                : 
                                134                 :                : /*
                                135                 :                :  * pg_backup_stop: finish taking an on-line backup.
                                136                 :                :  *
                                137                 :                :  * The first parameter (variable 'waitforarchive'), which is optional,
                                138                 :                :  * allows the user to choose if they want to wait for the WAL to be archived
                                139                 :                :  * or if we should just return as soon as the WAL record is written.
                                140                 :                :  *
                                141                 :                :  * This function stops an in-progress backup, creates backup_label contents and
                                142                 :                :  * it returns the backup stop LSN, backup_label and tablespace_map contents.
                                143                 :                :  *
                                144                 :                :  * The backup_label contains the user-supplied label string (typically this
                                145                 :                :  * would be used to tell where the backup dump will be stored), the starting
                                146                 :                :  * time, starting WAL location for the dump and so on.  It is the caller's
                                147                 :                :  * responsibility to write the backup_label and tablespace_map files in the
                                148                 :                :  * data folder that will be restored from this backup.
                                149                 :                :  *
                                150                 :                :  * Permission checking for this function is managed through the normal
                                151                 :                :  * GRANT system.
                                152                 :                :  */
                                153                 :                : Datum
 1490 sfrost@snowman.net        154                 :              2 : pg_backup_stop(PG_FUNCTION_ARGS)
                                155                 :                : {
                                156                 :                : #define PG_BACKUP_STOP_V2_COLS 3
                                157                 :                :     TupleDesc   tupdesc;
 1330 michael@paquier.xyz       158                 :              2 :     Datum       values[PG_BACKUP_STOP_V2_COLS] = {0};
                                159                 :              2 :     bool        nulls[PG_BACKUP_STOP_V2_COLS] = {0};
 1490 sfrost@snowman.net        160                 :              2 :     bool        waitforarchive = PG_GETARG_BOOL(0);
                                161                 :                :     char       *backup_label;
 3329 teodor@sigaev.ru          162                 :              2 :     SessionBackupState status = get_backup_status();
                                163                 :                : 
                                164                 :                :     /* Initialize attributes information in the tuple descriptor */
 3682 magnus@hagander.net       165         [ -  + ]:              2 :     if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE)
 3682 magnus@hagander.net       166         [ #  # ]:UBC           0 :         elog(ERROR, "return type must be a row type");
                                167                 :                : 
 1490 sfrost@snowman.net        168         [ -  + ]:CBC           2 :     if (status != SESSION_BACKUP_RUNNING)
 1490 sfrost@snowman.net        169         [ #  # ]:UBC           0 :         ereport(ERROR,
                                170                 :                :                 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                                171                 :                :                  errmsg("backup is not in progress"),
                                172                 :                :                  errhint("Did you call pg_backup_start()?")));
                                173                 :                : 
 1317 michael@paquier.xyz       174         [ -  + ]:CBC           2 :     Assert(backup_state != NULL);
                                175         [ -  + ]:              2 :     Assert(tablespace_map != NULL);
                                176                 :                : 
                                177                 :                :     /* Stop the backup */
                                178                 :              2 :     do_pg_backup_stop(backup_state, waitforarchive);
                                179                 :                : 
                                180                 :                :     /* Build the contents of backup_label */
                                181                 :              2 :     backup_label = build_backup_content(backup_state, false);
                                182                 :                : 
                                183                 :              2 :     values[0] = LSNGetDatum(backup_state->stoppoint);
 1316                           184                 :              2 :     values[1] = CStringGetTextDatum(backup_label);
 1317                           185                 :              2 :     values[2] = CStringGetTextDatum(tablespace_map->data);
                                186                 :                : 
                                187                 :                :     /* Deallocate backup-related variables */
 1291                           188                 :              2 :     pfree(backup_label);
                                189                 :                : 
                                190                 :                :     /* Clean up the session-level state and its memory context */
 1317                           191                 :              2 :     backup_state = NULL;
                                192                 :              2 :     tablespace_map = NULL;
 1291                           193                 :              2 :     MemoryContextDelete(backupcontext);
                                194                 :              2 :     backupcontext = NULL;
                                195                 :                : 
                                196                 :                :     /* Returns the record as Datum */
 1524                           197                 :              2 :     PG_RETURN_DATUM(HeapTupleGetDatum(heap_form_tuple(tupdesc, values, nulls)));
                                198                 :                : }
                                199                 :                : 
                                200                 :                : /*
                                201                 :                :  * pg_switch_wal: switch to next xlog file
                                202                 :                :  *
                                203                 :                :  * Permission checking for this function is managed through the normal
                                204                 :                :  * GRANT system.
                                205                 :                :  */
                                206                 :                : Datum
 3372 rhaas@postgresql.org      207                 :            472 : pg_switch_wal(PG_FUNCTION_ARGS)
                                208                 :                : {
                                209                 :                :     XLogRecPtr  switchpoint;
                                210                 :                : 
 5296 simon@2ndQuadrant.co      211         [ -  + ]:            472 :     if (RecoveryInProgress())
 5296 simon@2ndQuadrant.co      212         [ #  # ]:UBC           0 :         ereport(ERROR,
                                213                 :                :                 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                                214                 :                :                  errmsg("recovery is in progress"),
                                215                 :                :                  errhint("WAL control functions cannot be executed during recovery.")));
                                216                 :                : 
 3421 andres@anarazel.de        217                 :CBC         472 :     switchpoint = RequestXLogSwitch(false);
                                218                 :                : 
                                219                 :                :     /*
                                220                 :                :      * As a convenience, return the WAL location of the switch record
                                221                 :                :      */
 4458 rhaas@postgresql.org      222                 :            472 :     PG_RETURN_LSN(switchpoint);
                                223                 :                : }
                                224                 :                : 
                                225                 :                : /*
                                226                 :                :  * pg_log_standby_snapshot: call LogStandbySnapshot()
                                227                 :                :  *
                                228                 :                :  * Permission checking for this function is managed through the normal
                                229                 :                :  * GRANT system.
                                230                 :                :  */
                                231                 :                : Datum
 1123 andres@anarazel.de        232                 :             29 : pg_log_standby_snapshot(PG_FUNCTION_ARGS)
                                233                 :                : {
                                234                 :                :     XLogRecPtr  recptr;
                                235                 :                : 
                                236         [ -  + ]:             29 :     if (RecoveryInProgress())
 1123 andres@anarazel.de        237         [ #  # ]:UBC           0 :         ereport(ERROR,
                                238                 :                :                 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                                239                 :                :                  errmsg("recovery is in progress"),
                                240                 :                :                  errhint("%s cannot be executed during recovery.",
                                241                 :                :                          "pg_log_standby_snapshot()")));
                                242                 :                : 
 1123 andres@anarazel.de        243         [ -  + ]:CBC          29 :     if (!XLogStandbyInfoActive())
 1123 andres@anarazel.de        244         [ #  # ]:UBC           0 :         ereport(ERROR,
                                245                 :                :                 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                                246                 :                :                  errmsg("pg_log_standby_snapshot() can only be used if \"wal_level\" >= \"replica\"")));
                                247                 :                : 
   28 alvherre@kurilemu.de      248                 :GNC          29 :     recptr = LogStandbySnapshot(InvalidOid);
                                249                 :                : 
                                250                 :                :     /*
                                251                 :                :      * As a convenience, return the WAL location of the last inserted record
                                252                 :                :      */
 1123 andres@anarazel.de        253                 :CBC          29 :     PG_RETURN_LSN(recptr);
                                254                 :                : }
                                255                 :                : 
                                256                 :                : /*
                                257                 :                :  * pg_create_restore_point: a named point for restore
                                258                 :                :  *
                                259                 :                :  * Permission checking for this function is managed through the normal
                                260                 :                :  * GRANT system.
                                261                 :                :  */
                                262                 :                : Datum
 5296 simon@2ndQuadrant.co      263                 :              3 : pg_create_restore_point(PG_FUNCTION_ARGS)
                                264                 :                : {
 3341 noah@leadboat.com         265                 :              3 :     text       *restore_name = PG_GETARG_TEXT_PP(0);
                                266                 :                :     char       *restore_name_str;
                                267                 :                :     XLogRecPtr  restorepoint;
                                268                 :                : 
 5296 simon@2ndQuadrant.co      269         [ -  + ]:              3 :     if (RecoveryInProgress())
 5296 simon@2ndQuadrant.co      270         [ #  # ]:UBC           0 :         ereport(ERROR,
                                271                 :                :                 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                                272                 :                :                  errmsg("recovery is in progress"),
                                273                 :                :                  errhint("WAL control functions cannot be executed during recovery.")));
                                274                 :                : 
 5296 simon@2ndQuadrant.co      275         [ -  + ]:CBC           3 :     if (!XLogIsNeeded())
 5296 simon@2ndQuadrant.co      276         [ #  # ]:UBC           0 :         ereport(ERROR,
                                277                 :                :                 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                                278                 :                :                  errmsg("WAL level not sufficient for creating a restore point"),
                                279                 :                :                  errhint("\"wal_level\" must be set to \"replica\" or \"logical\" at server start.")));
                                280                 :                : 
 5296 simon@2ndQuadrant.co      281                 :CBC           3 :     restore_name_str = text_to_cstring(restore_name);
                                282                 :                : 
                                283         [ -  + ]:              3 :     if (strlen(restore_name_str) >= MAXFNAMELEN)
 5296 simon@2ndQuadrant.co      284         [ #  # ]:UBC           0 :         ereport(ERROR,
                                285                 :                :                 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
                                286                 :                :                  errmsg("value too long for restore point (maximum %d characters)", MAXFNAMELEN - 1)));
                                287                 :                : 
 5296 simon@2ndQuadrant.co      288                 :CBC           3 :     restorepoint = XLogRestorePoint(restore_name_str);
                                289                 :                : 
                                290                 :                :     /*
                                291                 :                :      * As a convenience, return the WAL location of the restore point record
                                292                 :                :      */
 4458 rhaas@postgresql.org      293                 :              3 :     PG_RETURN_LSN(restorepoint);
                                294                 :                : }
                                295                 :                : 
                                296                 :                : /*
                                297                 :                :  * Report the current WAL write location (same format as pg_backup_start etc)
                                298                 :                :  *
                                299                 :                :  * This is useful for determining how much of WAL is visible to an external
                                300                 :                :  * archiving process.  Note that the data before this point is written out
                                301                 :                :  * to the kernel, but is not necessarily synced to disk.
                                302                 :                :  */
                                303                 :                : Datum
 3281 tgl@sss.pgh.pa.us         304                 :            543 : pg_current_wal_lsn(PG_FUNCTION_ARGS)
                                305                 :                : {
                                306                 :                :     XLogRecPtr  current_recptr;
                                307                 :                : 
 5296 simon@2ndQuadrant.co      308         [ -  + ]:            543 :     if (RecoveryInProgress())
 5296 simon@2ndQuadrant.co      309         [ #  # ]:UBC           0 :         ereport(ERROR,
                                310                 :                :                 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                                311                 :                :                  errmsg("recovery is in progress"),
                                312                 :                :                  errhint("WAL control functions cannot be executed during recovery.")));
                                313                 :                : 
 5296 simon@2ndQuadrant.co      314                 :CBC         543 :     current_recptr = GetXLogWriteRecPtr();
                                315                 :                : 
 4458 rhaas@postgresql.org      316                 :            543 :     PG_RETURN_LSN(current_recptr);
                                317                 :                : }
                                318                 :                : 
                                319                 :                : /*
                                320                 :                :  * Report the current WAL insert location (same format as pg_backup_start etc)
                                321                 :                :  *
                                322                 :                :  * This function is mostly for debugging purposes.
                                323                 :                :  */
                                324                 :                : Datum
 3281 tgl@sss.pgh.pa.us         325                 :           1539 : pg_current_wal_insert_lsn(PG_FUNCTION_ARGS)
                                326                 :                : {
                                327                 :                :     XLogRecPtr  current_recptr;
                                328                 :                : 
 5296 simon@2ndQuadrant.co      329         [ -  + ]:           1539 :     if (RecoveryInProgress())
 5296 simon@2ndQuadrant.co      330         [ #  # ]:UBC           0 :         ereport(ERROR,
                                331                 :                :                 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                                332                 :                :                  errmsg("recovery is in progress"),
                                333                 :                :                  errhint("WAL control functions cannot be executed during recovery.")));
                                334                 :                : 
 5228 heikki.linnakangas@i      335                 :CBC        1539 :     current_recptr = GetXLogInsertRecPtr();
                                336                 :                : 
 4458 rhaas@postgresql.org      337                 :           1539 :     PG_RETURN_LSN(current_recptr);
                                338                 :                : }
                                339                 :                : 
                                340                 :                : /*
                                341                 :                :  * Report the current WAL flush location (same format as pg_backup_start etc)
                                342                 :                :  *
                                343                 :                :  * This function is mostly for debugging purposes.
                                344                 :                :  */
                                345                 :                : Datum
 3281 tgl@sss.pgh.pa.us         346                 :             91 : pg_current_wal_flush_lsn(PG_FUNCTION_ARGS)
                                347                 :                : {
                                348                 :                :     XLogRecPtr  current_recptr;
                                349                 :                : 
 3766 simon@2ndQuadrant.co      350         [ -  + ]:             91 :     if (RecoveryInProgress())
 3766 simon@2ndQuadrant.co      351         [ #  # ]:UBC           0 :         ereport(ERROR,
                                352                 :                :                 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                                353                 :                :                  errmsg("recovery is in progress"),
                                354                 :                :                  errhint("WAL control functions cannot be executed during recovery.")));
                                355                 :                : 
 1642 rhaas@postgresql.org      356                 :CBC          91 :     current_recptr = GetFlushRecPtr(NULL);
                                357                 :                : 
 3766 simon@2ndQuadrant.co      358                 :             91 :     PG_RETURN_LSN(current_recptr);
                                359                 :                : }
                                360                 :                : 
                                361                 :                : /*
                                362                 :                :  * Report the last WAL receive location (same format as pg_backup_start etc)
                                363                 :                :  *
                                364                 :                :  * This is useful for determining how much of WAL is guaranteed to be received
                                365                 :                :  * and synced to disk by walreceiver.
                                366                 :                :  */
                                367                 :                : Datum
 3281 tgl@sss.pgh.pa.us         368                 :              8 : pg_last_wal_receive_lsn(PG_FUNCTION_ARGS)
                                369                 :                : {
                                370                 :                :     XLogRecPtr  recptr;
                                371                 :                : 
 2218 tmunro@postgresql.or      372                 :              8 :     recptr = GetWalRcvFlushRecPtr(NULL, NULL);
                                373                 :                : 
  180 alvherre@kurilemu.de      374         [ -  + ]:GNC           8 :     if (!XLogRecPtrIsValid(recptr))
 5296 simon@2ndQuadrant.co      375                 :UBC           0 :         PG_RETURN_NULL();
                                376                 :                : 
 4458 rhaas@postgresql.org      377                 :CBC           8 :     PG_RETURN_LSN(recptr);
                                378                 :                : }
                                379                 :                : 
                                380                 :                : /*
                                381                 :                :  * Report the last WAL replay location (same format as pg_backup_start etc)
                                382                 :                :  *
                                383                 :                :  * This is useful for determining how much of WAL is visible to read-only
                                384                 :                :  * connections during recovery.
                                385                 :                :  */
                                386                 :                : Datum
 3281 tgl@sss.pgh.pa.us         387                 :             45 : pg_last_wal_replay_lsn(PG_FUNCTION_ARGS)
                                388                 :                : {
                                389                 :                :     XLogRecPtr  recptr;
                                390                 :                : 
 4884 heikki.linnakangas@i      391                 :             45 :     recptr = GetXLogReplayRecPtr(NULL);
                                392                 :                : 
  180 alvherre@kurilemu.de      393         [ -  + ]:GNC          45 :     if (!XLogRecPtrIsValid(recptr))
 5296 simon@2ndQuadrant.co      394                 :UBC           0 :         PG_RETURN_NULL();
                                395                 :                : 
 4458 rhaas@postgresql.org      396                 :CBC          45 :     PG_RETURN_LSN(recptr);
                                397                 :                : }
                                398                 :                : 
                                399                 :                : /*
                                400                 :                :  * Compute an xlog file name and decimal byte offset given a WAL location,
                                401                 :                :  * such as is returned by pg_backup_stop() or pg_switch_wal().
                                402                 :                :  */
                                403                 :                : Datum
 3372                           404                 :             12 : pg_walfile_name_offset(PG_FUNCTION_ARGS)
                                405                 :                : {
                                406                 :                :     XLogSegNo   xlogsegno;
                                407                 :                :     uint32      xrecoff;
 4458                           408                 :             12 :     XLogRecPtr  locationpoint = PG_GETARG_LSN(0);
                                409                 :                :     char        xlogfilename[MAXFNAMELEN];
                                410                 :                :     Datum       values[2];
                                411                 :                :     bool        isnull[2];
                                412                 :                :     TupleDesc   resultTupleDesc;
                                413                 :                :     HeapTuple   resultHeapTuple;
                                414                 :                :     Datum       result;
                                415                 :                : 
 5296 simon@2ndQuadrant.co      416         [ -  + ]:             12 :     if (RecoveryInProgress())
 5296 simon@2ndQuadrant.co      417         [ #  # ]:UBC           0 :         ereport(ERROR,
                                418                 :                :                 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                                419                 :                :                  errmsg("recovery is in progress"),
                                420                 :                :                  errhint("%s cannot be executed during recovery.",
                                421                 :                :                          "pg_walfile_name_offset()")));
                                422                 :                : 
                                423                 :                :     /*
                                424                 :                :      * Construct a tuple descriptor for the result row.  This must match this
                                425                 :                :      * function's pg_proc entry!
                                426                 :                :      */
 2723 andres@anarazel.de        427                 :CBC          12 :     resultTupleDesc = CreateTemplateTupleDesc(2);
 5296 simon@2ndQuadrant.co      428                 :             12 :     TupleDescInitEntry(resultTupleDesc, (AttrNumber) 1, "file_name",
                                429                 :                :                        TEXTOID, -1, 0);
                                430                 :             12 :     TupleDescInitEntry(resultTupleDesc, (AttrNumber) 2, "file_offset",
                                431                 :                :                        INT4OID, -1, 0);
                                432                 :                : 
   50 drowley@postgresql.o      433                 :GNC          12 :     TupleDescFinalize(resultTupleDesc);
 5296 simon@2ndQuadrant.co      434                 :CBC          12 :     resultTupleDesc = BlessTupleDesc(resultTupleDesc);
                                435                 :                : 
                                436                 :                :     /*
                                437                 :                :      * xlogfilename
                                438                 :                :      */
  893 bruce@momjian.us          439                 :             12 :     XLByteToSeg(locationpoint, xlogsegno, wal_segment_size);
 1642 rhaas@postgresql.org      440                 :             12 :     XLogFileName(xlogfilename, GetWALInsertionTimeLine(), xlogsegno,
                                441                 :                :                  wal_segment_size);
                                442                 :                : 
 5296 simon@2ndQuadrant.co      443                 :             12 :     values[0] = CStringGetTextDatum(xlogfilename);
                                444                 :             12 :     isnull[0] = false;
                                445                 :                : 
                                446                 :                :     /*
                                447                 :                :      * offset
                                448                 :                :      */
 3150 andres@anarazel.de        449                 :             12 :     xrecoff = XLogSegmentOffset(locationpoint, wal_segment_size);
                                450                 :                : 
 5296 simon@2ndQuadrant.co      451                 :             12 :     values[1] = UInt32GetDatum(xrecoff);
                                452                 :             12 :     isnull[1] = false;
                                453                 :                : 
                                454                 :                :     /*
                                455                 :                :      * Tuple jam: Having first prepared your Datums, then squash together
                                456                 :                :      */
                                457                 :             12 :     resultHeapTuple = heap_form_tuple(resultTupleDesc, values, isnull);
                                458                 :                : 
                                459                 :             12 :     result = HeapTupleGetDatum(resultHeapTuple);
                                460                 :                : 
                                461                 :             12 :     PG_RETURN_DATUM(result);
                                462                 :                : }
                                463                 :                : 
                                464                 :                : /*
                                465                 :                :  * Compute an xlog file name given a WAL location,
                                466                 :                :  * such as is returned by pg_backup_stop() or pg_switch_wal().
                                467                 :                :  */
                                468                 :                : Datum
 3372 rhaas@postgresql.org      469                 :             25 : pg_walfile_name(PG_FUNCTION_ARGS)
                                470                 :                : {
                                471                 :                :     XLogSegNo   xlogsegno;
 4458                           472                 :             25 :     XLogRecPtr  locationpoint = PG_GETARG_LSN(0);
                                473                 :                :     char        xlogfilename[MAXFNAMELEN];
                                474                 :                : 
 5296 simon@2ndQuadrant.co      475         [ -  + ]:             25 :     if (RecoveryInProgress())
 5296 simon@2ndQuadrant.co      476         [ #  # ]:UBC           0 :         ereport(ERROR,
                                477                 :                :                 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                                478                 :                :                  errmsg("recovery is in progress"),
                                479                 :                :                  errhint("%s cannot be executed during recovery.",
                                480                 :                :                          "pg_walfile_name()")));
                                481                 :                : 
  893 bruce@momjian.us          482                 :CBC          25 :     XLByteToSeg(locationpoint, xlogsegno, wal_segment_size);
 1642 rhaas@postgresql.org      483                 :             25 :     XLogFileName(xlogfilename, GetWALInsertionTimeLine(), xlogsegno,
                                484                 :                :                  wal_segment_size);
                                485                 :                : 
 5296 simon@2ndQuadrant.co      486                 :             25 :     PG_RETURN_TEXT_P(cstring_to_text(xlogfilename));
                                487                 :                : }
                                488                 :                : 
                                489                 :                : /*
                                490                 :                :  * Extract the sequence number and the timeline ID from given a WAL file
                                491                 :                :  * name.
                                492                 :                :  */
                                493                 :                : Datum
 1229 michael@paquier.xyz       494                 :             24 : pg_split_walfile_name(PG_FUNCTION_ARGS)
                                495                 :                : {
                                496                 :                : #define PG_SPLIT_WALFILE_NAME_COLS 2
 1232                           497                 :             24 :     char       *fname = text_to_cstring(PG_GETARG_TEXT_PP(0));
                                498                 :                :     char       *fname_upper;
                                499                 :                :     char       *p;
                                500                 :                :     TimeLineID  tli;
                                501                 :                :     XLogSegNo   segno;
 1229                           502                 :             24 :     Datum       values[PG_SPLIT_WALFILE_NAME_COLS] = {0};
                                503                 :             24 :     bool        isnull[PG_SPLIT_WALFILE_NAME_COLS] = {0};
                                504                 :                :     TupleDesc   tupdesc;
                                505                 :                :     HeapTuple   tuple;
                                506                 :                :     char        buf[256];
                                507                 :                :     Datum       result;
                                508                 :                : 
 1232                           509                 :             24 :     fname_upper = pstrdup(fname);
                                510                 :                : 
                                511                 :                :     /* Capitalize WAL file name. */
                                512         [ +  + ]:            532 :     for (p = fname_upper; *p; p++)
  155 jdavis@postgresql.or      513                 :GNC         508 :         *p = pg_ascii_toupper((unsigned char) *p);
                                514                 :                : 
 1232 michael@paquier.xyz       515         [ +  + ]:CBC          24 :     if (!IsXLogFileName(fname_upper))
                                516         [ +  - ]:              4 :         ereport(ERROR,
                                517                 :                :                 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
                                518                 :                :                  errmsg("invalid WAL file name \"%s\"", fname)));
                                519                 :                : 
                                520                 :             20 :     XLogFromFileName(fname_upper, &tli, &segno, wal_segment_size);
                                521                 :                : 
                                522         [ -  + ]:             20 :     if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE)
 1232 michael@paquier.xyz       523         [ #  # ]:UBC           0 :         elog(ERROR, "return type must be a row type");
                                524                 :                : 
                                525                 :                :     /* Convert to numeric. */
 1232 michael@paquier.xyz       526                 :CBC          20 :     snprintf(buf, sizeof buf, UINT64_FORMAT, segno);
                                527                 :             20 :     values[0] = DirectFunctionCall3(numeric_in,
                                528                 :                :                                     CStringGetDatum(buf),
                                529                 :                :                                     ObjectIdGetDatum(0),
                                530                 :                :                                     Int32GetDatum(-1));
                                531                 :                : 
                                532                 :             20 :     values[1] = Int64GetDatum(tli);
                                533                 :                : 
                                534                 :             20 :     tuple = heap_form_tuple(tupdesc, values, isnull);
                                535                 :             20 :     result = HeapTupleGetDatum(tuple);
                                536                 :                : 
                                537                 :             20 :     PG_RETURN_DATUM(result);
                                538                 :                : 
                                539                 :                : #undef PG_SPLIT_WALFILE_NAME_COLS
                                540                 :                : }
                                541                 :                : 
                                542                 :                : /*
                                543                 :                :  * pg_wal_replay_pause - Request to pause recovery
                                544                 :                :  *
                                545                 :                :  * Permission checking for this function is managed through the normal
                                546                 :                :  * GRANT system.
                                547                 :                :  */
                                548                 :                : Datum
 3372 rhaas@postgresql.org      549                 :              8 : pg_wal_replay_pause(PG_FUNCTION_ARGS)
                                550                 :                : {
 5296 simon@2ndQuadrant.co      551         [ -  + ]:              8 :     if (!RecoveryInProgress())
 5296 simon@2ndQuadrant.co      552         [ #  # ]:UBC           0 :         ereport(ERROR,
                                553                 :                :                 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                                554                 :                :                  errmsg("recovery is not in progress"),
                                555                 :                :                  errhint("Recovery control functions can only be executed during recovery.")));
                                556                 :                : 
 2233 fujii@postgresql.org      557         [ -  + ]:CBC           8 :     if (PromoteIsTriggered())
 2233 fujii@postgresql.org      558         [ #  # ]:UBC           0 :         ereport(ERROR,
                                559                 :                :                 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                                560                 :                :                  errmsg("standby promotion is ongoing"),
                                561                 :                :                  errhint("%s cannot be executed after promotion is triggered.",
                                562                 :                :                          "pg_wal_replay_pause()")));
                                563                 :                : 
 5296 simon@2ndQuadrant.co      564                 :CBC           8 :     SetRecoveryPause(true);
                                565                 :                : 
                                566                 :                :     /* wake up the recovery process so that it can process the pause request */
 1881 rhaas@postgresql.org      567                 :              8 :     WakeupRecovery();
                                568                 :                : 
 5296 simon@2ndQuadrant.co      569                 :              8 :     PG_RETURN_VOID();
                                570                 :                : }
                                571                 :                : 
                                572                 :                : /*
                                573                 :                :  * pg_wal_replay_resume - resume recovery now
                                574                 :                :  *
                                575                 :                :  * Permission checking for this function is managed through the normal
                                576                 :                :  * GRANT system.
                                577                 :                :  */
                                578                 :                : Datum
 3372 rhaas@postgresql.org      579                 :              7 : pg_wal_replay_resume(PG_FUNCTION_ARGS)
                                580                 :                : {
 5296 simon@2ndQuadrant.co      581         [ -  + ]:              7 :     if (!RecoveryInProgress())
 5296 simon@2ndQuadrant.co      582         [ #  # ]:UBC           0 :         ereport(ERROR,
                                583                 :                :                 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                                584                 :                :                  errmsg("recovery is not in progress"),
                                585                 :                :                  errhint("Recovery control functions can only be executed during recovery.")));
                                586                 :                : 
 2233 fujii@postgresql.org      587         [ -  + ]:CBC           7 :     if (PromoteIsTriggered())
 2233 fujii@postgresql.org      588         [ #  # ]:UBC           0 :         ereport(ERROR,
                                589                 :                :                 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                                590                 :                :                  errmsg("standby promotion is ongoing"),
                                591                 :                :                  errhint("%s cannot be executed after promotion is triggered.",
                                592                 :                :                          "pg_wal_replay_resume()")));
                                593                 :                : 
 5296 simon@2ndQuadrant.co      594                 :CBC           7 :     SetRecoveryPause(false);
                                595                 :                : 
                                596                 :              7 :     PG_RETURN_VOID();
                                597                 :                : }
                                598                 :                : 
                                599                 :                : /*
                                600                 :                :  * pg_is_wal_replay_paused
                                601                 :                :  */
                                602                 :                : Datum
 3372 rhaas@postgresql.org      603                 :GBC           1 : pg_is_wal_replay_paused(PG_FUNCTION_ARGS)
                                604                 :                : {
 5296 simon@2ndQuadrant.co      605         [ -  + ]:              1 :     if (!RecoveryInProgress())
 5296 simon@2ndQuadrant.co      606         [ #  # ]:UBC           0 :         ereport(ERROR,
                                607                 :                :                 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                                608                 :                :                  errmsg("recovery is not in progress"),
                                609                 :                :                  errhint("Recovery control functions can only be executed during recovery.")));
                                610                 :                : 
 1881 rhaas@postgresql.org      611                 :GBC           1 :     PG_RETURN_BOOL(GetRecoveryPauseState() != RECOVERY_NOT_PAUSED);
                                612                 :                : }
                                613                 :                : 
                                614                 :                : /*
                                615                 :                :  * pg_get_wal_replay_pause_state - Returns the recovery pause state.
                                616                 :                :  *
                                617                 :                :  * Returned values:
                                618                 :                :  *
                                619                 :                :  * 'not paused' - if pause is not requested
                                620                 :                :  * 'pause requested' - if pause is requested but recovery is not yet paused
                                621                 :                :  * 'paused' - if recovery is paused
                                622                 :                :  */
                                623                 :                : Datum
 1881 rhaas@postgresql.org      624                 :CBC           8 : pg_get_wal_replay_pause_state(PG_FUNCTION_ARGS)
                                625                 :                : {
                                626                 :                :     RecoveryPauseState state;
                                627                 :                : 
                                628         [ -  + ]:              8 :     if (!RecoveryInProgress())
 1881 rhaas@postgresql.org      629         [ #  # ]:UBC           0 :         ereport(ERROR,
                                630                 :                :                 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                                631                 :                :                  errmsg("recovery is not in progress"),
                                632                 :                :                  errhint("Recovery control functions can only be executed during recovery.")));
                                633                 :                : 
   60 michael@paquier.xyz       634                 :GNC           8 :     state = GetRecoveryPauseState();
                                635                 :                : 
                                636                 :                :     /* get the recovery pause state */
                                637                 :              8 :     PG_RETURN_TEXT_P(cstring_to_text(GetRecoveryPauseStateString(state)));
                                638                 :                : }
                                639                 :                : 
                                640                 :                : /*
                                641                 :                :  * Returns timestamp of latest processed commit/abort record.
                                642                 :                :  *
                                643                 :                :  * When the server has been started normally without recovery the function
                                644                 :                :  * returns NULL.
                                645                 :                :  */
                                646                 :                : Datum
 5296 simon@2ndQuadrant.co      647                 :UBC           0 : pg_last_xact_replay_timestamp(PG_FUNCTION_ARGS)
                                648                 :                : {
                                649                 :                :     TimestampTz xtime;
                                650                 :                : 
                                651                 :              0 :     xtime = GetLatestXTime();
                                652         [ #  # ]:              0 :     if (xtime == 0)
                                653                 :              0 :         PG_RETURN_NULL();
                                654                 :                : 
                                655                 :              0 :     PG_RETURN_TIMESTAMPTZ(xtime);
                                656                 :                : }
                                657                 :                : 
                                658                 :                : /*
                                659                 :                :  * Returns bool with current recovery mode, a global state.
                                660                 :                :  */
                                661                 :                : Datum
 5296 simon@2ndQuadrant.co      662                 :CBC        1075 : pg_is_in_recovery(PG_FUNCTION_ARGS)
                                663                 :                : {
                                664                 :           1075 :     PG_RETURN_BOOL(RecoveryInProgress());
                                665                 :                : }
                                666                 :                : 
                                667                 :                : /*
                                668                 :                :  * Compute the difference in bytes between two WAL locations.
                                669                 :                :  */
                                670                 :                : Datum
 3281 tgl@sss.pgh.pa.us         671                 :              8 : pg_wal_lsn_diff(PG_FUNCTION_ARGS)
                                672                 :                : {
                                673                 :                :     Datum       result;
                                674                 :                : 
 4458 rhaas@postgresql.org      675                 :              8 :     result = DirectFunctionCall2(pg_lsn_mi,
                                676                 :                :                                  PG_GETARG_DATUM(0),
                                677                 :                :                                  PG_GETARG_DATUM(1));
                                678                 :                : 
 1346 peter@eisentraut.org      679                 :              8 :     PG_RETURN_DATUM(result);
                                680                 :                : }
                                681                 :                : 
                                682                 :                : /*
                                683                 :                :  * Promotes a standby server.
                                684                 :                :  *
                                685                 :                :  * A result of "true" means that promotion has been completed if "wait" is
                                686                 :                :  * "true", or initiated if "wait" is false.
                                687                 :                :  */
                                688                 :                : Datum
 2749 michael@paquier.xyz       689                 :              3 : pg_promote(PG_FUNCTION_ARGS)
                                690                 :                : {
                                691                 :              3 :     bool        wait = PG_GETARG_BOOL(0);
                                692                 :              3 :     int         wait_seconds = PG_GETARG_INT32(1);
                                693                 :                :     FILE       *promote_file;
                                694                 :                :     TimestampTz end_time;
                                695                 :                : 
                                696         [ -  + ]:              3 :     if (!RecoveryInProgress())
 2749 michael@paquier.xyz       697         [ #  # ]:UBC           0 :         ereport(ERROR,
                                698                 :                :                 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                                699                 :                :                  errmsg("recovery is not in progress"),
                                700                 :                :                  errhint("Recovery control functions can only be executed during recovery.")));
                                701                 :                : 
 2749 michael@paquier.xyz       702         [ -  + ]:CBC           3 :     if (wait_seconds <= 0)
 2749 michael@paquier.xyz       703         [ #  # ]:UBC           0 :         ereport(ERROR,
                                704                 :                :                 (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
                                705                 :                :                  errmsg("\"wait_seconds\" must not be negative or zero")));
                                706                 :                : 
                                707                 :                :     /* create the promote signal file */
 2749 michael@paquier.xyz       708                 :CBC           3 :     promote_file = AllocateFile(PROMOTE_SIGNAL_FILE, "w");
                                709         [ -  + ]:              3 :     if (!promote_file)
 2749 michael@paquier.xyz       710         [ #  # ]:UBC           0 :         ereport(ERROR,
                                711                 :                :                 (errcode_for_file_access(),
                                712                 :                :                  errmsg("could not create file \"%s\": %m",
                                713                 :                :                         PROMOTE_SIGNAL_FILE)));
                                714                 :                : 
 2749 michael@paquier.xyz       715         [ -  + ]:CBC           3 :     if (FreeFile(promote_file))
 2749 michael@paquier.xyz       716         [ #  # ]:UBC           0 :         ereport(ERROR,
                                717                 :                :                 (errcode_for_file_access(),
                                718                 :                :                  errmsg("could not write file \"%s\": %m",
                                719                 :                :                         PROMOTE_SIGNAL_FILE)));
                                720                 :                : 
                                721                 :                :     /* signal the postmaster */
 2749 michael@paquier.xyz       722         [ -  + ]:CBC           3 :     if (kill(PostmasterPid, SIGUSR1) != 0)
                                723                 :                :     {
 2749 michael@paquier.xyz       724                 :UBC           0 :         (void) unlink(PROMOTE_SIGNAL_FILE);
  980                           725         [ #  # ]:              0 :         ereport(ERROR,
                                726                 :                :                 (errcode(ERRCODE_SYSTEM_ERROR),
                                727                 :                :                  errmsg("failed to send signal to postmaster: %m")));
                                728                 :                :     }
                                729                 :                : 
                                730                 :                :     /* return immediately if waiting was not requested */
 2749 michael@paquier.xyz       731         [ +  + ]:CBC           3 :     if (!wait)
 2749 michael@paquier.xyz       732                 :GBC           1 :         PG_RETURN_BOOL(true);
                                733                 :                : 
                                734                 :                :     /* wait for the amount of time wanted until promotion */
   40 michael@paquier.xyz       735                 :GNC           2 :     end_time = TimestampTzPlusSeconds(GetCurrentTimestamp(), wait_seconds);
                                736         [ +  - ]:             22 :     while (GetCurrentTimestamp() < end_time)
                                737                 :                :     {
                                738                 :                :         int         rc;
                                739                 :                : 
 2749 michael@paquier.xyz       740                 :CBC          22 :         ResetLatch(MyLatch);
                                741                 :                : 
                                742         [ +  + ]:             22 :         if (!RecoveryInProgress())
                                743                 :              2 :             PG_RETURN_BOOL(true);
                                744                 :                : 
                                745         [ +  + ]:             20 :         CHECK_FOR_INTERRUPTS();
                                746                 :                : 
 2433 fujii@postgresql.org      747                 :             20 :         rc = WaitLatch(MyLatch,
                                748                 :                :                        WL_LATCH_SET | WL_TIMEOUT | WL_POSTMASTER_DEATH,
                                749                 :                :                        100L,
                                750                 :                :                        WAIT_EVENT_PROMOTE);
                                751                 :                : 
                                752                 :                :         /*
                                753                 :                :          * Emergency bailout if postmaster has died.  This is to avoid the
                                754                 :                :          * necessity for manual cleanup of all postmaster children.
                                755                 :                :          */
                                756         [ -  + ]:             20 :         if (rc & WL_POSTMASTER_DEATH)
  980 michael@paquier.xyz       757         [ #  # ]:UBC           0 :             ereport(FATAL,
                                758                 :                :                     (errcode(ERRCODE_ADMIN_SHUTDOWN),
                                759                 :                :                      errmsg("terminating connection due to unexpected postmaster exit"),
                                760                 :                :                      errcontext("while waiting on promotion")));
                                761                 :                :     }
                                762                 :                : 
 2749                           763         [ #  # ]:              0 :     ereport(WARNING,
                                764                 :                :             (errmsg_plural("server did not promote within %d second",
                                765                 :                :                            "server did not promote within %d seconds",
                                766                 :                :                            wait_seconds,
                                767                 :                :                            wait_seconds)));
                                768                 :              0 :     PG_RETURN_BOOL(false);
                                769                 :                : }
                                770                 :                : 
                                771                 :                : /*
                                772                 :                :  * pg_stat_get_recovery - returns information about WAL recovery state
                                773                 :                :  *
                                774                 :                :  * Returns NULL when not in recovery or when the caller lacks
                                775                 :                :  * pg_read_all_stats privileges; one row otherwise.
                                776                 :                :  */
                                777                 :                : Datum
   60 michael@paquier.xyz       778                 :GNC           5 : pg_stat_get_recovery(PG_FUNCTION_ARGS)
                                779                 :                : {
                                780                 :                :     TupleDesc   tupdesc;
                                781                 :                :     Datum      *values;
                                782                 :                :     bool       *nulls;
                                783                 :                : 
                                784                 :                :     /* Local copies of shared state */
                                785                 :                :     bool        promote_triggered;
                                786                 :                :     XLogRecPtr  last_replayed_read_lsn;
                                787                 :                :     XLogRecPtr  last_replayed_end_lsn;
                                788                 :                :     TimeLineID  last_replayed_tli;
                                789                 :                :     XLogRecPtr  replay_end_lsn;
                                790                 :                :     TimeLineID  replay_end_tli;
                                791                 :                :     TimestampTz recovery_last_xact_time;
                                792                 :                :     TimestampTz current_chunk_start_time;
                                793                 :                :     RecoveryPauseState pause_state;
                                794                 :                : 
                                795         [ +  + ]:              5 :     if (!RecoveryInProgress())
                                796                 :              4 :         PG_RETURN_NULL();
                                797                 :                : 
                                798         [ -  + ]:              1 :     if (!has_privs_of_role(GetUserId(), ROLE_PG_READ_ALL_STATS))
   60 michael@paquier.xyz       799                 :UNC           0 :         PG_RETURN_NULL();
                                800                 :                : 
                                801                 :                :     /* Take a lock to ensure value consistency */
   60 michael@paquier.xyz       802                 :GNC           1 :     SpinLockAcquire(&XLogRecoveryCtl->info_lck);
                                803                 :              1 :     promote_triggered = XLogRecoveryCtl->SharedPromoteIsTriggered;
                                804                 :              1 :     last_replayed_read_lsn = XLogRecoveryCtl->lastReplayedReadRecPtr;
                                805                 :              1 :     last_replayed_end_lsn = XLogRecoveryCtl->lastReplayedEndRecPtr;
                                806                 :              1 :     last_replayed_tli = XLogRecoveryCtl->lastReplayedTLI;
                                807                 :              1 :     replay_end_lsn = XLogRecoveryCtl->replayEndRecPtr;
                                808                 :              1 :     replay_end_tli = XLogRecoveryCtl->replayEndTLI;
                                809                 :              1 :     recovery_last_xact_time = XLogRecoveryCtl->recoveryLastXTime;
                                810                 :              1 :     current_chunk_start_time = XLogRecoveryCtl->currentChunkStartTime;
                                811                 :              1 :     pause_state = XLogRecoveryCtl->recoveryPauseState;
                                812                 :              1 :     SpinLockRelease(&XLogRecoveryCtl->info_lck);
                                813                 :                : 
                                814         [ -  + ]:              1 :     if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE)
   60 michael@paquier.xyz       815         [ #  # ]:UNC           0 :         elog(ERROR, "return type must be a row type");
                                816                 :                : 
   60 michael@paquier.xyz       817                 :GNC           1 :     values = palloc0_array(Datum, tupdesc->natts);
                                818                 :              1 :     nulls = palloc0_array(bool, tupdesc->natts);
                                819                 :                : 
                                820                 :              1 :     values[0] = BoolGetDatum(promote_triggered);
                                821                 :                : 
                                822         [ +  - ]:              1 :     if (XLogRecPtrIsValid(last_replayed_read_lsn))
                                823                 :              1 :         values[1] = LSNGetDatum(last_replayed_read_lsn);
                                824                 :                :     else
   60 michael@paquier.xyz       825                 :UNC           0 :         nulls[1] = true;
                                826                 :                : 
   60 michael@paquier.xyz       827         [ +  - ]:GNC           1 :     if (XLogRecPtrIsValid(last_replayed_end_lsn))
                                828                 :              1 :         values[2] = LSNGetDatum(last_replayed_end_lsn);
                                829                 :                :     else
   60 michael@paquier.xyz       830                 :UNC           0 :         nulls[2] = true;
                                831                 :                : 
   60 michael@paquier.xyz       832         [ +  - ]:GNC           1 :     if (XLogRecPtrIsValid(last_replayed_end_lsn))
                                833                 :              1 :         values[3] = Int32GetDatum(last_replayed_tli);
                                834                 :                :     else
   60 michael@paquier.xyz       835                 :UNC           0 :         nulls[3] = true;
                                836                 :                : 
   60 michael@paquier.xyz       837         [ +  - ]:GNC           1 :     if (XLogRecPtrIsValid(replay_end_lsn))
                                838                 :              1 :         values[4] = LSNGetDatum(replay_end_lsn);
                                839                 :                :     else
   60 michael@paquier.xyz       840                 :UNC           0 :         nulls[4] = true;
                                841                 :                : 
   60 michael@paquier.xyz       842         [ +  - ]:GNC           1 :     if (XLogRecPtrIsValid(replay_end_lsn))
                                843                 :              1 :         values[5] = Int32GetDatum(replay_end_tli);
                                844                 :                :     else
   60 michael@paquier.xyz       845                 :UNC           0 :         nulls[5] = true;
                                846                 :                : 
   60 michael@paquier.xyz       847         [ +  - ]:GNC           1 :     if (recovery_last_xact_time != 0)
                                848                 :              1 :         values[6] = TimestampTzGetDatum(recovery_last_xact_time);
                                849                 :                :     else
   60 michael@paquier.xyz       850                 :UNC           0 :         nulls[6] = true;
                                851                 :                : 
   60 michael@paquier.xyz       852         [ +  - ]:GNC           1 :     if (current_chunk_start_time != 0)
                                853                 :              1 :         values[7] = TimestampTzGetDatum(current_chunk_start_time);
                                854                 :                :     else
   60 michael@paquier.xyz       855                 :UNC           0 :         nulls[7] = true;
                                856                 :                : 
   60 michael@paquier.xyz       857                 :GNC           1 :     values[8] = CStringGetTextDatum(GetRecoveryPauseStateString(pause_state));
                                858                 :                : 
                                859                 :              1 :     PG_RETURN_DATUM(HeapTupleGetDatum(heap_form_tuple(tupdesc, values, nulls)));
                                860                 :                : }
        

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