External search with AlloyDB now supports OpenSearch in Preview

## Feature Feature External search with AlloyDB now supports [OpenSearch](https://cloud.google.com/alloydb/docs/opensearch) in [Preview](https://cloud.google.com/products#product-launch-stages). You can use the [external\_search\_fdw](https://cloud.google.com/alloydb/docs/reference/extensions#external%5Fsearch%5Ffdw) extension to connect to an OpenSearch cluster and query its data directly from your database.