      --
      -- Create model WorldBorder
      --
      CREATE TABLE "world_worldborder" (
          "id" bigserial NOT NULL PRIMARY KEY,
          "name" varchar(50) NOT NULL,
          "area" integer NOT NULL,
          "pop2005" integer NOT NULL,
          "fips" varchar(2) NOT NULL,
          "iso2" varchar(2) NOT NULL,
 
</s> remove         "id" serial NOT NULL PRIMARY KEY,
 </s> add         "id" bigint NOT NULL PRIMARY KEY GENERATED BY DEFAULT AS IDENTITY, </s> remove         "id" serial NOT NULL PRIMARY KEY,
 </s> add         "id" bigint NOT NULL PRIMARY KEY GENERATED BY DEFAULT AS IDENTITY, </s> remove         "question_id" integer NOT NULL
 </s> add         "question_id" bigint NOT NULL </s> remove         "id" serial NOT NULL PRIMARY KEY,
 </s> add         "id" bigint NOT NULL PRIMARY KEY GENERATED BY DEFAULT AS IDENTITY, </s> remove   such as ``auto_increment`` (MySQL), ``serial`` (PostgreSQL), or ``integer
  primary key autoincrement`` (SQLite) are handled for you automatically. Same
  goes for the quoting of field names -- e.g., using double quotes or
  single quotes.
 </s> add   such as ``auto_increment`` (MySQL), ``bigint PRIMARY KEY GENERATED BY DEFAULT
  AS IDENTITY`` (PostgreSQL), or ``integer primary key autoincrement`` (SQLite)
  are handled for you automatically. Same goes for the quoting of field names
  -- e.g., using double quotes or single quotes.
        "id" bigint NOT NULL PRIMARY KEY GENERATED BY DEFAULT AS IDENTITY,
      --
      -- Create model WorldBorder
      --
      CREATE TABLE "world_worldborder" (
        "id" bigint NOT NULL PRIMARY KEY GENERATED BY DEFAULT AS IDENTITY,
          "name" varchar(50) NOT NULL,
          "area" integer NOT NULL,
          "pop2005" integer NOT NULL,
          "fips" varchar(2) NOT NULL,
          "iso2" varchar(2) NOT NULL,
keep keep keep keep replace keep keep keep keep keep
 Refs #30511 -- Updated docs about auto-incrementing primary keys on PostgreSQL.

Follow up to 2eea361eff58dd98c409c5227064b901f41bd0d6. 
docs/ref/contrib/gis/tutorial.txt