Unable to Recover a Deleted Database Using PITR

From: Scott Taylor <relationaldbforbeginners(at)gmail(dot)com>
To: pgsql-general(at)postgresql(dot)org
Subject: Unable to Recover a Deleted Database Using PITR
Date: 2024-12-02 20:12:10
Message-ID: CAATRiS02z4X2-VaQYd=bXs2gZuCSEhJ3FvHFoKssxSXmjuoWAA@mail.gmail.com
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Database randomdata did not fully restore.
This consistently does not work.
Am I missing a step or concept about how PITR works?
I am using postgres version: PostgreSQL 17.2 on x86_64-windows

Steps:
1) Updated postgresql.conf:
archive_mode = on
archive_command = 'copy "%p" "C:\\PostgresArchive\\Wal-Archive\\%f"'
log_statement = mod
summarize_wal = on

2) Re-started postgres server

3) Created a database "randomdata" and a table, inserted data:
*2024-12-02 13:57:24*.049 EST [31268] LOG: statement: insert into
somedata (serialnumber, firstname, lastname)

4) Ran pg_basebackup

5) Dropped database:
* 2024-12-02 14:01:27*.243 EST [19148] LOG: statement: DROP DATABASE
randomdata;

6) Stopped postgres server

7) Removed contents of data folder: C:\Program Files\PostgreSQL\17\data

8) Extracted base.tar.gz (from pg_basebackup) into C:\Program
Files\PostgreSQL\17\data

9) Removed contents of pg_wal folder: C:\Program
Files\PostgreSQL\17\data\pg_wal

10) Added to postgresql.conf:
restore_command = 'copy "C:\\PostgresArchive\\Wal-Archive\\%f" "%p"'
recovery_target_time = '*2024-12-02 13:57:24*' (time from log file when
insert occured, see step 2)
recovery_target_action = promote

11) Created recovery.signal file in postgres data folder

12) Started postgres server

13) Attempted to connect to database using psql:
postgres=# \c randomdata;
connection to server at "localhost" (::1), port 5432 failed: FATAL:
cannot connect to invalid database "randomdata"
HINT: Use DROP DATABASE to drop invalid databases.
Previous connection kept

14) Noticed recovery.signal file was removed

*Log file:*
2024-12-02 13:57:23.852 EST [32352] LOG: statement: create database
randomdata;
2024-12-02 13:57:24.043 EST [31268] LOG: statement: create table somedata
(id serial primary key, serialnumber integer, firstname text, lastname
text);
2024-12-02 13:57:24.049 EST [31268] LOG: statement: insert into somedata
(serialnumber, firstname, lastname)

*- Ran pg_basebackup*

2024-12-02 14:01:27.243 EST [19148] LOG: statement: DROP DATABASE
randomdata;

*- Deleted Data folder, then restored from backup file and restarted server*

2024-12-02 14:04:21.630 EST [20156] LOG: database system was interrupted;
last known up at 2024-12-02 14:00:22 EST
2024-12-02 14:04:21.630 EST [20156] LOG: creating missing WAL directory
"pg_wal/archive_status"
2024-12-02 14:04:21.630 EST [20156] LOG: creating missing WAL directory
"pg_wal/summaries"
2024-12-02 14:04:22.792 EST [20156] LOG: starting backup recovery with
redo LSN 0/3000028, checkpoint LSN 0/3000080, on timeline ID 1
2024-12-02 14:04:22.805 EST [20156] LOG: restored log file
"000000010000000000000003" from archive
2024-12-02 14:04:22.818 EST [20156] LOG: starting point-in-time recovery
to 2024-12-02 13:57:24-05
2024-12-02 14:04:22.825 EST [20156] LOG: redo starts at 0/3000028
2024-12-02 14:04:22.826 EST [20156] LOG: completed backup recovery with
redo LSN 0/3000028 and end LSN 0/3000120
2024-12-02 14:04:22.826 EST [20156] LOG: consistent recovery state reached
at 0/3000120
2024-12-02 14:04:22.843 EST [20156] LOG: restored log file
"000000010000000000000004" from archive
2024-12-02 14:04:22.871 EST [20156] LOG: recovery stopping before commit
of transaction 969, time 2024-12-02 14:01:27.281164-05
2024-12-02 14:04:22.871 EST [20156] LOG: redo done at 0/40006F8 system
usage: CPU: user: 0.00 s, system: 0.00 s, elapsed: 0.04 s
2024-12-02 14:04:22.879 EST [20156] LOG: selected new timeline ID: 2
2024-12-02 14:04:22.940 EST [20156] LOG: archive recovery complete
2024-12-02 14:04:22.941 EST [30656] LOG: checkpoint starting:
end-of-recovery immediate wait
2024-12-02 14:04:22.952 EST [30656] LOG: checkpoint complete: wrote 4
buffers (0.0%); 0 WAL file(s) added, 0 removed, 1 recycled; write=0.001 s,
sync=0.003 s, total=0.012 s; sync files=3, longest=0.001 s, average=0.001
s; distance=16385 kB, estimate=16385 kB; lsn=0/40006F8, redo lsn=0/40006F8

2024-12-02 14:05:38.142 EST [15876] FATAL: cannot connect to invalid
database "randomdata"
2024-12-02 14:05:38.142 EST [15876] HINT: Use DROP DATABASE to drop
invalid databases.

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