WIP Prepare postgres for migration by replication

site-cookbooks/kosmos_postgresql/files/drop_subscriptions.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+set -e
+
+echo "== Dropping subscriptions =="
+
+for db in $(psql -Atqc "SELECT datname FROM pg_database WHERE datallowconn AND datname NOT IN ('template1')"); do
+  echo "Processing DB: $db"
+
+  SUB="migrate_sub_${db}"
+
+  # Check if subscription exists
+  EXISTS=$(psql -d "$db" -Atqc "SELECT 1 FROM pg_subscription WHERE subname = '$SUB'")
+
+  if [ "$EXISTS" = "1" ]; then
+    echo "  Found subscription: $SUB"
+
+    # Disable first (good practice)
+    psql -d "$db" -c "ALTER SUBSCRIPTION $SUB DISABLE;"
+
+    # Drop it (must be top-level)
+    psql -d "$db" -c "DROP SUBSCRIPTION $SUB;"
+
+  else
+    echo "  No subscription: $SUB"
+  fi
+
+done
+
+echo "== Done =="