To make MeiliSearch expose the documents that are stored in your PostgreSQL (or any other database) you must extract them and store them in our engine using the HTTP API we provide to you. https://docs.meilisearch.com/references/documents.html#add-o...
For that you will need to also define the different attributes your document is composed of.
We thought about providing a simple tool to extract the documents from an SQL table into the MeiliSearch directly.