Immich: alternate method of migration

ct/immich.sh

@@ -184,15 +184,38 @@ function update_script() {
     msg_ok "Stopped ${APP}"
     if [[ "$(cat /opt/${APP}_version.txt)" < "1.133.0" ]]; then
       msg_info "Upgrading to the VectorChord PostgreSQL extension"
+      NUMBER="$(
+        sed -n '2p' <(
+          sudo -u postgres psql -A -d immich <<EOF
+        SELECT atttypmod as dimsize
+          FROM pg_attribute f
+          JOIN pg_class c ON c.oid = f.attrelid
+          WHERE c.relkind = 'r'::char
+          AND f.attnum > 0
+          AND c.relname = 'smart_search'::text
+          AND f.attname = 'embedding'::text;
+EOF
+        )
+      )"
+      $STD sudo -u postgres psql -d immich <<EOF
+      DROP INDEX IF EXISTS clip_index;
+      DROP INDEX IF EXISTS face_index;
+      ALTER TABLE smart_search ALTER COLUMN embedding SET DATA TYPE real[];
+      ALTER TABLE face_search ALTER COLUMN embedding SET DATA TYPE real[];
+EOF
       $STD apt-get update
       $STD apt-get install postgresql-16-pgvector -y
       curl -fsSL https://github.com/tensorchord/VectorChord/releases/download/0.3.0/postgresql-16-vchord_0.3.0-1_amd64.deb -o vchord.deb
       $STD dpkg -i vchord.deb
       rm vchord.deb
-      sed -i -e "s/'vectors.so'/'vchord.so, vectors.so'/" \
-        -e "/^search_path/s/, vectors//" /etc/postgresql/16/main/postgresql.conf
+      sed -i "s|vectors.so|vchord.so|" /etc/postgresql/16/main/postgresql.conf
       systemctl restart postgresql.service
-      msg_ok "Upgrade in progress. When Immich restarts, watch the logs for 're-indexing' to complete"
+      $STD sudo -u postgres psql -d immich <<EOF
+      CREATE EXTENSION IF NOT EXISTS vchord CASCADE;
+      ALTER TABLE smart_search ALTER COLUMN embedding SET DATA TYPE vector($NUMBER);
+      ALTER TABLE face_search ALTER COLUMN embedding SET DATA TYPE vector(512);
+EOF
+      msg_ok "Database upgrade complete"
     fi
     INSTALL_DIR="/opt/${APP}"
     UPLOAD_DIR="${INSTALL_DIR}/upload"