[PostgreSQL] Privilèges

Privs useful to any new user created.

[Postgres] How to Enable / Disable Archive Mode

 

https://orahow.com/enable-disable-archive-mode-in-postgres/

L'extension oracle_fdw

#se connecter au serveur target
psql -U <muyser>
CREATE EXTENSION oracle_fdw;
dew
CREATE SERVER orasrv FOREIGN DATA WRAPPER oracle_fdw (dbserver '<servername>:<port>/<SID>');
des+
GRANT USAGE ON FOREIGN SERVER orasrv TO <muyser>;
CREATE USER MAPPING FOR <muyser> SERVER orasrv OPTIONS ( USER '<oracle_user>', PASSWORD 'xxxx');
deu+
CREATE FOREIGN TABLE ext_<ORATBL> ( id int OPTIONS (key 'true'), name varchar(64), t_data timestamp) SERVER orasrv OPTIONS (SCHEMA '<ORAUSER>' , TABLE '<ORATBL>');

tuto : https://www.postgresql.fastware.com/postgresql-insider-fdw-ora-bas

Pré requis : 
- avoir une VM avec postgresql d'installé sur le meme VLAN qu'une base oracle avec Oracle instantclient-basic, instantclient-devel d'installé
- Ensure that pg_config is in your path, and ORACLE_HOME as well as LD_LIBRARY_PATH are configured
- avoir accès au compte postgres dans la bdd
- avoir accès à une base oracle en sysdba
- The <oracle_user> will obviously need CREATE SESSION privilege and the right to select from the table or view in question.

Bon à savoir : If a NUMBER is converted to a boolean, 0 means false, everything else true.

télécharger l'extension 

 

On tire la chasse et on nettoie ?

PostgreSQL - vacuumdb - vacuumdb — ramasse les ordures et analyse une base de données PostgreSQL Synopsi - Français (runebook.dev)

Calcul stats PostgreSQL

for tablename in $(psql -U postgres -h $2 -d $1 -t -c "select table_name as _table from information_schema.tables t where t.table_schema='sche_admin' order by _table asc"); do

  echo $tablename

  psql -U postgres -h $2 -d $1 -c "analyze ${tablename};"

  psql -U postgres -h $2 -d $1 -c "select count(*) ${tablename} from ${tablename};" >> compte_pgsql.log

done

 

En // :

vacuumdb --port=$PORT --username=$PG_USER --analyze-only --verbose --jobs=4  $PG_DATABASE

[PostgreSQL] pgBackRest sauvegarder la standby

Backup From a Standby | pgBackRest (pmatseykanets.github.io)

[PostgreSQL] Vérifier le statut de la réplication

On master:

select * from pg_stat_replication;

On replica (streaming replication in my case):

select * from pg_stat_wal_receiver;

On your master, pg_stat_replication provides data about ongoing replication:

select client_addr, state, sent_location, write_location,
        flush_location, replay_location from pg_stat_replication;

On postgresql v10:

select client_addr, state, sent_lsn, write_lsn,
    flush_lsn, replay_lsn from pg_stat_replication;

On server

postgres=# select usename,application_name,client_addr,backend_start,state,sync_state from pg_stat_replication ;


On client

postgres=# select pg_is_in_recovery();

postgres=# select pg_last_xlog_receive_location();

postgres=#    SELECT CASE WHEN pg_last_xlog_receive_location() = pg_last_xlog_replay_location()
                  THEN 0
                ELSE EXTRACT (EPOCH FROM now() - pg_last_xact_replay_timestamp())
              END AS log_delay;

postgres=# select pg_last_xlog_replay_location();

[PostgreSQL] COMPRESS

Detecting inline, inline-compressed and TOAST storage

+--+--------------+------------------+----------+-----------+-------------+
|id|full_name     |uncompressed_bytes|compressed|out_of_line|bytes_on_disk|
+--+--------------+------------------+----------+-----------+-------------+
|1 |joe toast     |4004              |false     |true       |4000         |
|2 |joe compressed|3000              |true      |false      |44           |
|3 |joe inline    |10                |false     |false      |11           |

Deploy new postgreSQL instance dMZR

Deploy new postgreSQL instance dMZR

Modifier l'encodage PostgreSQL en UTF8

How to change PostgreSQL database encoding to UTF8 (shubhamdipt.com)