Parent: $root.$constants
| kPgSqlConnectionAuthOK | Received authentication, waiting for backend startup |
| kPgSqlConnectionBad | The connection failed |
| kPgSqlConnectionMade | Connection OK; waiting to send |
| kPgSqlConnectionNeeded | Internal state, awaiting connection |
| kPgSqlConnectionOK | Successful connection |
| kPgSqlConnectionSetenv | Negotiating environment-driven parameter settings |
| kPgSqlConnectionStarted | Waiting for connection to be made |
| kPgSqlConnectionWaiting | Waiting for a response from the postmaster |