[BUG] error importing postgresql sql script

[carlosmascarenhas]

Describe the bug
When I try to import an SQL script generated by drawDB itself that has an auto-increment field, the following error is returned:

Apparently it has to do with the PR #255

To Reproduce
try to import this sql script that was generated by drawDB itself:

CREATE TABLE "test" (
	"id" INTEGER NOT NULL UNIQUE GENERATED BY DEFAULT AS IDENTITY,
	PRIMARY KEY("id")
);

[1ilit]

#255 deals with exports. The parser fails on 'generated'. I'll report it if I haven't already