PostgreSQL

Potente e storico server SQL by RedHat

• Query al volo su un database Postgres

export PGPASSWORD="password"
psql -t -A -h <hostname> <database> <utente> -c "SELECT myquery FROM table";

• Get list of databases and their sizes:

 SELECT pg_database.datname, pg_database_size(pg_database.datname), pg_size_pretty(pg_database_size(pg_database.datname)) FROM pg_database ORDER BY pg_database_size DESC;

• script to compare the row count on all tables between a master and a replica database (run in the replica with "trusted" user)

tables=`$PCOMMAND -c "select tablename from pg_tables;"`

host_src=10.1.1.1
host_dst=10.1.1.2
PCOMMAND="psql -t -A  -Upostgres ipaylater_db"

tables=`$PCOMMAND -h$host_src -c "SELECT * FROM information_schema.tables WHERE table_type != 'VIEW'"|awk -F"|" '{print $2"."$3}'`

IFS=$'\n'
for TABLE in $tables ;do
    unset IFS
    count_src=`$PCOMMAND -h$host_src -c "select count(*) from $TABLE;"`
    count_dst=`$PCOMMAND -h$host_dst -c "select count(*) from $TABLE;"`
    if [ $count_src -ne $count_dst ];then
      echo -e "different record count betwen $host_src ($count_src)\t and $host_dst ($count_dst)\t in table $TABLE"
    fi
done

• More Logging

add in postgresql.conf

log_line_prefix = '%t %c %u ' # time sessionid user
log_statement = 'all'

phpPgAdmin

• fix problem with version Postgres version 9.4

• taken and modified from: http://stackoverflow.com/questions/13467949/error-on-creating-database-in-phppgadmin

Quick Fix: (worked with my Version (5.0.3) / pg 9.2.3 )

1. cd classes/database
2. copy Postgres84.php to Postgres94.php
3. open Connection.php
4. add a line case '9.4': return 'Postgres94'; break; at the // Detect version and choose appropriate database driver switch.
5. open Postgres.php and copy functions getTablespaces + getTablespace
6. open Postgres94.php and paste the functions into the class
   1. replace ", spclocation," with ", pg_tablespace_location(oid) as spclocation," in both functions.
   2. change class name to Postgres94