Escaping single quotes in shell for postgresql

Question

I\'m trying to execute SQK through psql under postgres account. I\'m able run SQL that doesn\'t contain quotes

root@server:/home/rosta/SCRIPTS# su postgres -c &qu         


        

Answer 1

Simplest way is to use a 'here document' , which ignores all quoting:

#!/bin/sh
DB_NAME=my_data_base

psql -U postgres postgres <<STOP_IT
create database $DB_NAME template=template0
  encoding='utf8'
  owner=aaa
  lc_collate='cs_CZ.utf8'
  ;
STOP_IT

Answer 2

What I usually do is use double quotes (") for postgres -c's argument and escaped double quotes (\") for psql -c's argument. That way, I can use single quotes (') inside the SQL string with no problem:

[root@mycomputer ~]# su postgres -c "psql -c \"SELECT 'hi'  \" "
 ?column? 
----------
 hi
(1 row)