anchor.diff:  
   * `tags` including `sqldb`, `dashDB`, or `db2`
   * `label` beginning with the `sqldb`, `dashDB`, or `db2` tags
  -* `uri` or `uris` using the scheme `db2`
  +* `uri` using the scheme `db2`
   * `jdbcUrl` field in `credentials` using the subprotocol `db2` in the JDBC URL
   * `db2Uri`, `db2uri`, `db2Url`, or `db2url` fields in `credentials`
   
  
positive.code: 
  The connector will check for:
  
  * `uri` or `uris` using the scheme `oracle`
  * `jdbcUrl` field in `credentials` using the subprotocol `oracle` in the JDBC URL
  * `oracleUri`, `oracleuri`, `oracleUrl`, or `oracleurl` fields in `credentials`
  
  
negative.code: 
  * `tags` including `mongodb`
  * `label` beginning with the `mongodb` tag
  * `uri` using the scheme `mongodb`
  * `mongodbUri`, `mongodburi`, `mongodbUrl`, or `mongodburl` fields in `credentials`
  
  ==== MySQL
  