How to connect (Py)Spark to Postgres database using JDBC

Question

I have followed instructions from this posting to read data from an existing Postgres database with table named \"objects\" as defined and created by the Objects

Answer 1

Problems with name resolving are indicated by org.postgresql.util.PSQLException and don't result in NPE. The source of the issue is actually a connection string and in particular the way you provide user credentials. At first glance it looks like a bug but if you're looking for a quick solution you can either use URL properties:

url = 'jdbc:postgresql://PG_SERVER_IP/db_name?user=PG_USER&password=PASSWORD'

or properties argument:

properties = {
    "user": "PG_USER",
    "password": "PASSWORD",
    "driver": "org.postgresql.Driver"
}