create role with randomly generated password + print it to output

Author: NikolayS

matviews/refresh_all.sql

@@ -18,13 +18,9 @@ declare
   done_cnt integer; -- how many matviews refreshed
   curts timestamptz;
 begin
-  begin
-    if current_setting('postgres_dba.refresh_matviews_with_data_forced')::boolean then
-      set postgres_dba.refresh_matviews_with_data = true;
-    end if;
-  exception when others then
-    -- nothing
-  end;
+  if current_setting('postgres_dba.refresh_matviews_with_data_forced', true)::boolean then
+    set postgres_dba.refresh_matviews_with_data = true;
+  end if;
   if current_setting('postgres_dba.refresh_matviews_with_data')::boolean then
     raise notice 'Refreshing ALL matviews (run ''set postgres_dba.refresh_matviews_with_data_forced = TRUE;'' to refresh only matviews w/o data).';
     for matview in

roles/create_user_with_random_password.sql

@@ -0,0 +1,53 @@
+\prompt "Username?" postgres_dba_username
+\prompt "Superuser? (1 if yes, 0 if no)" postgres_dba_is_superuser
+\prompt "Login? (1 if yes, 0 if no)" postgres_dba_login
+
+\set q_postgres_dba_username '\'' :postgres_dba_username '\''
+\set q_postgres_dba_is_superuser '\'' :postgres_dba_is_superuser '\''
+\set q_postgres_dba_login '\'' :postgres_dba_login '\''
+
+begin;
+
+\o /dev/null
+select set_config('postgres_dba.username', :q_postgres_dba_username, true);
+select set_config('postgres_dba.is_superuser', :q_postgres_dba_is_superuser, true);
+select set_config('postgres_dba.login', :q_postgres_dba_login, true);
+\o
+
+do $$
+declare
+  pwd text;
+  j int4;
+  allowed text;
+  allowed_len int4;
+  sql text;
+begin
+  if current_setting('postgres_dba.username')::text = '' then
+    raise exception 'Username is not specified.';
+  end if;
+  allowed := '23456789abcdefghjkmnpqrstuvwxyzABCDEFGHJKMNPQRSTUVWXYZ&#%@';
+  allowed_len := length(allowed);
+  pwd := '';
+  while length(pwd) < 16 loop
+    j := int4(random() * allowed_len);
+    pwd := pwd || substr(allowed, j+1, 1);
+  end loop;
+  sql := 'create role ' || current_setting('postgres_dba.username')::text
+    || (case when lower(current_setting('postgres_dba.is_superuser')::text) not in ('0', '', 'no', 'false', 'n', 'f') then ' superuser' else '' end)
+    || (case when lower(current_setting('postgres_dba.login')::text) not in ('0', '', 'no', 'false', 'n', 'f') then ' login' else '' end)
+    || ' password ''' || pwd || ''';';
+  raise notice 'SQL: %', sql;
+  execute sql;
+  raise notice 'User % created, password: %', current_setting('postgres_dba.username')::text, pwd;
+end;
+$$ language plpgsql;
+
+commit;
+
+\unset postgres_dba_username
+\unset postgres_dba_username
+\unset postgres_dba_login
+\unset q_postgres_dba_username
+\unset q_postgres_dba_username
+\unset q_postgres_dba_login
+