EclipseLink generates invalid PostgreSQL DDL `(INTEGER SERIAL NOT NULL)`

[pardhiv-krishna]

When using EclipseLink 5.0.0-B12 or 5.0.0-B13 or 4.0.9 with PostgreSQL, schema generation for entities with @GeneratedValue(strategy = GenerationType.IDENTITY) produces invalid DDL. Specifically, EclipseLink generates:

CREATE TABLE WLPParticipant (
  ID INTEGER SERIAL NOT NULL,
  "FIRST" VARCHAR(255),
  "LAST" VARCHAR(255),
  PRIMARY KEY (ID)
);

PostgreSQL rejects this with:

ERROR: syntax error at or near "SERIAL"

Expected behavior: EclipseLink should generate either ID SERIAL PRIMARY KEY or ID INTEGER GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY, which are valid PostgreSQL construct