fix pg errors being reported as user errors

We had some out of shared memory errors being reported to the user. I
will look into actually fixing the memory issues later.

Author: ryansmith3136

be/src/api.rs

@@ -192,10 +192,15 @@ impl From<deadpool_postgres::PoolError> for Error {
 
 impl From<tokio_postgres::Error> for Error {
     fn from(err: tokio_postgres::Error) -> Self {
-        match err.as_db_error() {
-            Some(e) => Error::User(e.message().to_string()),
-            None => Error::User(err.to_string()),
+        if let Some(code) = err.code() {
+            let code = code.code();
+            // https://www.postgresql.org/docs/current/errcodes-appendix.html
+            if code.starts_with("53") || code.starts_with("54") {
+                return Error::Server(err.into());
+            }
+            return Error::User(err.to_string());
         }
+        Error::Server(err.into())
     }
 }