Improve postgres management scripts

site-cookbooks/kosmos_postgresql/files/dump_all_databases.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 cd /tmp && \
 (pg_dumpall --globals-only > globals.sql) && \
-psql -Atqc "SELECT datname FROM pg_database WHERE datallowconn AND datname NOT IN (''template0'',''postgres'')" | \
+psql -Atqc "SELECT datname FROM pg_database WHERE datallowconn AND datname NOT IN (''template1'',''postgres'')" | \
 xargs -I{} -P4 sh -c "
   pg_dump -Fd -j 4 -d \"{}\" -f dump_{} &&
   tar -cf - dump_{} | zstd -19 -T0 > dump_{}.tar.zst &&

site-cookbooks/kosmos_postgresql/files/list_subscriptions.sh

@@ -1,5 +1,16 @@
 #!/bin/bash
-for db in $(psql -Atqc "SELECT datname FROM pg_database WHERE datallowconn AND datname NOT IN ('template1','postgres')"); do
-  echo "==== DB: $db ===="
-  psql -d "$db" -c "SELECT * FROM pg_stat_subscription;"
+set -euo pipefail
+
+psql -Atqc "
+SELECT datname
+FROM pg_database
+WHERE datallowconn
+  AND datname NOT IN ('template1','postgres')
+" | while read -r db; do
+  result=$(psql -X -At -d "$db" -c "SELECT * FROM pg_stat_subscription;" 2>/dev/null || true)
+
+  if [[ -n "$result" ]]; then
+    echo "==== DB: $db ===="
+    echo "$result"
+  fi
 done