Upgrading a Major Version

Querying the Target Version to Which a DB Instance Can Be Upgraded (RDS for PostgreSQL)
Performing a Major Version Upgrade Pre-Check for a DB Instance (RDS for PostgreSQL)
Querying the Major Version Check Status or Upgrade Status of a DB Instance (RDS for PostgreSQL)
Querying the Major Version Upgrade Check History of a DB Instance (RDS for PostgreSQL)
Upgrading a Major Version of a DB Instance (RDS for PostgreSQL)
Querying the Major Version Upgrade History of a DB Instance (RDS for PostgreSQL)

Parent topic: API v3 (Recommended)