notes/postgres/postgres.md

setup for single sign on with [SSPI](https://wiki.postgresql.org/wiki/Configuring_for_single_sign-on_using_SSPI_on_Windows)

md5 hash is salted with username in front


Memory
=========================================================
see whats in the buffer cache with pg_buffercache

`CREATE EXTENSION pg_buffercache` 

```
SELECT
	c.relname,
	COUNT(*) AS buffers
FROM
	pg_class c
INNER JOIN pg_buffercache b ON
	b.relfilenode = c.relfilenode
INNER JOIN pg_database d ON
	( b.reldatabase = d.oid
	AND d.datname = CURRENT_DATABASE())
GROUP BY
	c.relname
ORDER BY
	2 DESC
LIMIT 100;
```

Alter Column
==========================================================
ALTER TABLE rlarp.pcore ALTER COLUMN pack SET DATA TYPE numeric USING pack::numeric

psql binary for latest version is always used but pg_dump is not, you have to set the default version in ~/.postgresqlrc