Charmatzis

CREATE OR REPLACE FUNCTION primary_id_sequences_from_all_tables()
RETURNS TABLE (table_name TEXT, column_name TEXT, data_type TEXT, max BIGINT, next BIGINT) AS $$
DECLARE
    rec RECORD;
BEGIN
    FOR rec IN
        SELECT tc.table_name, kcu.column_name, c.data_type
        FROM information_schema.table_constraints AS tc
        JOIN information_schema.key_column_usage AS kcu
            ON tc.constraint_name = kcu.constraint_name

Charmatzis

select
    name,
    setting
from
    pg_settings
where
    name in ('wal_level', 'track_commit_timestamp', 'max_worker_processes', 'max_replication_slots', 'max_wal_senders  ', 'shared_preload_libraries');

SELECT name,
    setting,

Charmatzis

SELECT i.relname "Table Name",indexrelname "Index Name",
 pg_size_pretty(pg_total_relation_size(relid)) As "Total Size",
 pg_size_pretty(pg_indexes_size(relid)) as "Total Size of all Indexes",
 pg_size_pretty(pg_relation_size(relid)) as "Table Size",
 pg_size_pretty(pg_relation_size(indexrelid)) "Index Size",
 reltuples::bigint "Estimated table row count"
  FROM pg_stat_all_indexes i JOIN pg_class c ON i.relid=c.oid 
 WHERE i.relname='table_name';

Charmatzis

-- Taken from https://wiki.openstreetmap.org/wiki/Slippy_map_tilenames#PostgreSQL
CREATE OR REPLACE FUNCTION lon2tile(lon DOUBLE PRECISION, zoom INTEGER)
  RETURNS INTEGER AS
$BODY$
    SELECT FLOOR( (lon + 180) / 360 * (1 << zoom) )::INTEGER;
$BODY$
  LANGUAGE SQL IMMUTABLE;

CREATE OR REPLACE FUNCTION lat2tile(lat double precision, zoom integer)
  RETURNS integer AS

Charmatzis

{
  "$schema": "https://raw.githubusercontent.com/JanDeDobbeleer/oh-my-posh/main/themes/schema.json",
  "console_title_template": "{{.Folder}}{{if .Root}} :: root{{end}} :: {{.Shell}}",
  "blocks": [
    {
      "alignment": "left",
      "newline": true,
      "segments": [
        {
          "foreground": "#ffbebc",

Charmatzis

select count(a.id), sum(case when b.id is null then 0 else 1 end) as b_exists,
       sum(case when b.id is null then 1 else 0 end) as b_does_not_exist
from a left join b on a.b_id = b.id;

-- Or even better
select count(a.id),
       count(b.id) filter b.id is not null as b_exists,
       count(b.id) filter b.id is null  as b_does_not_exist
from a left join b on a.b_id = b.id;

Charmatzis

$userPath = $env:USERPROFILE
$pathExclusions = New-Object System.Collections.ArrayList
$processExclusions = New-Object System.Collections.ArrayList

$pathExclusions.Add('C:\Windows\Microsoft.NET') > $null
$pathExclusions.Add('C:\Windows\assembly') > $null
$pathExclusions.Add($userPath + '\AppData\Local\Microsoft\VisualStudio') > $null
$pathExclusions.Add('C:\ProgramData\Microsoft\VisualStudio\Packages') > $null
$pathExclusions.Add('C:\Program Files (x86)\MSBuild') > $null
$pathExclusions.Add('C:\Program Files (x86)\Microsoft Visual Studio 14.0') > $null

Charmatzis

-- perform a "select pg_stat_reset();" when you want to reset counter statistics
with 
all_tables as
(
SELECT  *
FROM    (
    SELECT  'all'::text as table_name, 
        sum( (coalesce(heap_blks_read,0) + coalesce(idx_blks_read,0) + coalesce(toast_blks_read,0) + coalesce(tidx_blks_read,0)) ) as from_disk, 
        sum( (coalesce(heap_blks_hit,0)  + coalesce(idx_blks_hit,0)  + coalesce(toast_blks_hit,0)  + coalesce(tidx_blks_hit,0))  ) as from_cache    
    FROM    pg_statio_all_tables  --> change to pg_statio_USER_tables if you want to check only user tables (excluding postgres's own tables)

Charmatzis

select round(( 100 * total_time / sum(total_time) over ())::numeric, 2) percent,
             round(total_time::numeric, 2) as total,
             calls,
             round(mean_time::numeric, 2) as mean,
             stddev_time,
             query
from pg_stat_statements
order by total_time DESC
limit 10;

Charmatzis

SELECT concat(concat('"', string_agg(uuid, '","')) , '"')
  FROM (
    SELECT uuid::text
      FROM public.my_table
      ) a;