[Question] JDBC Postgres required fields

[scheung38]

From articles such as

https://help.aiven.io/en/articles/3416789-jdbc-source-connector-with-postgresql

a minimum working Postsgres JDBC Connector is like:

{
    "name": "jdbc_source_connector_postgresql_01",
    "config": {
        "connector.class": "io.confluent.connect.jdbc.JdbcSourceConnector",
        "connection.url": "jdbc:postgresql://localhost:5432/demo",
        "connection.user": "postgres",
        "connection.password": "root",
        "topic.prefix": "postgres-01-",
        "poll.interval.ms" : 3600000,
        "mode":"bulk"
    }
}

or

{
  "connector.class": "io.confluent.connect.jdbc.JdbcSourceConnector",
  "mode": "timestamp+incrementing",
  "timestamp.column.name": "modified",
  "incrementing.column.name": "id",
  "topic.prefix": "jdbc_var_cols-",
  "tasks.max": "1",
  "poll.interval.ms": "1000",
  "query": "SELECT id,name,email,department,modified FROM test",
  "connection.url": "jdbc:mariadb://127.0.0.1:3306/connect_test?user=root&password=confluent"
}

Why are all the following required fields here before I can be allowed to CREATE a JDBC Source Connector?

"key.converter" : Invalid value for configuration key.converter: Class could not be found.
"value.converter" : Invalid value for configuration value.converter: Class could not be found.
"header.converter" : Invalid value for configuration header.converter: Class could not be found.
"table.whitelist" : Invalid value for configuration numeric.mapping: Invalid enumerator
"table.blacklist" : Invalid value for configuration numeric.mapping: Invalid enumerator
"numeric.mapping" : Invalid value for configuration numeric.mapping: Invalid enumerator
"incrementing.column.name" : Query mode must be specified
"timestamp.column.name" : Query mode must be specified
"timestamp.initial" : Invalid value for configuration timestamp.initial: Not a number of type LONG
"timestamp.initial" : Query mode must be specified
"validate.non.null" : Query mode must be specified
Config "key.converter" requires a value
Config "value.converter" requires a value
Config "header.converter" requires a value
Config "transforms" requires a value
Config "connection.user" requires a value
Config "connection.password" requires a value
Config "table.whitelist" requires a value
Config "table.blacklist" requires a value
Config "catalog.pattern" requires a value
Config "schema.pattern" requires a value
Config "numeric.mapping" requires a value
Config "dialect.name" requires a value
Config "mode" requires a value
Config "incrementing.column.name" requires a value
Config "timestamp.column.name" requires a value
Config "timestamp.initial" requires a value
Config "query" requires a value
Config "query.suffix" requires a value