StartupMessage

This is the first packet sent by the client on connection.

Attributes

• int protocolMajor: the major version of the protocol. Check the Postgres documentation for the exact meaning.

• int protocolMinor: the minor version of the protocol.

• Map<String, String> parameters: the parameters and their value.

Known parameters:

• user: required, the Postgres user name. 

• database: optional, the database to which to connect.

• options: deprecated

• replication: can be true, false or database. The default is false.

Other parameters are usually present (like client_encoding, DateStyle or TimeZone), but that depends on the client type and settings.

Example

Set the database if it is not specified by the client.

if ( ! context.packet.getParameter("database")) {
    context.packet.setParameter("database", "maindb");
}