import (
  "gorm.io/driver/postgres"
  "gorm.io/gorm"
)

// https://github.com/jackc/pgx
dsn := "user=gorm password=gorm DB.name=gorm port=9920 sslmode=disable TimeZone=Asia/Shanghai"
db, err := gorm.Open(postgres.Open(dsn), &gorm.Config{})

import (
  "gorm.io/driver/postgres"
  "gorm.io/gorm"
)

db, err := gorm.Open(postgres.New(postgres.Config{
  DSN: "user=gorm password=gorm DB.name=gorm port=9920 sslmode=disable TimeZone=Asia/Shanghai", // data source name, refer https://github.com/jackc/pgx
  PreferSimpleProtocol: true, // disables implicit prepared statement usage. By default pgx automatically uses the extended protocol
}), &gorm.Config{})