Function sync 

pub fn sync(
    out: &Path,
    config: &Config,
    schemas: Option<&[String]>,
) -> Result<(), Error>

Synchronize PostgreSQL metadata into a cache that can later be loaded as a Baseline.

The connection is read from DATABASE_URL and must target localhost or a Unix socket. Encrypted caches read SAFE_MIGRATE_CACHE_KEY from the process environment.

Errors

Returns ErrorKind::Configuration for invalid settings and ErrorKind::Sync when the connection, catalog read, or durable cache replacement fails.