Export database as SQL produces invalid SQL for PostgreSQL #1031

Steps to reproduce this issue

1. Create a temporary database in PostgreSQL.

2. Execute the following script against the temporary database:
   CREATE SEQUENCE IF NOT EXISTS driver_id_seq START 1;
   CREATE TABLE IF NOT EXISTS "driver" (
   "id" INTEGER NOT NULL DEFAULT nextval('driver_id_seq'::regclass),
   "first_name" TEXT NULL DEFAULT NULL,
   "last_name" TEXT NULL DEFAULT NULL,
   PRIMARY KEY ("id")
   );
   CREATE INDEX IF NOT EXISTS "driver_database_name_name_idx" ON driver ("first_name", "last_name");

3. From HeidiSQL, Right click on the database and choose "Export database as SQL".

4. Ensure that only the driver table is selected in the options;

5. Ensure that the Table(s) Create option is checked.

6. Set the Output option as desired.

7. Press the Export button.

Current behavior

HeidiSQL generates the following SQL:
CREATE TABLE IF NOT EXISTS "driver" (
"id" INTEGER NOT NULL DEFAULT 'nextval(''driver_id_seq''::regclass)',
"first_name" TEXT NULL DEFAULT NULL,
"last_name" TEXT NULL DEFAULT NULL,
INDEX "driver_database_name_name_idx" ("first_name", "last_name"),
PRIMARY KEY ("id")
);

This syntax cannot be executed in PostgreSQL using HeidiSQL.

Expected behavior

The generated SQL must be as show in step 1.
Varitions in syntax.

• The "IF NOT EXISTS" is optional.
• The CREATE SEQUENCE IF NOT EXISTS driver_id_seq START 1; can be replaced with SERIAL. EG:
  CREATE TABLE IF NOT EXISTS "driver" (
  "id" SERIAL,
  "first_name" TEXT NULL DEFAULT NULL,
  "last_name" TEXT NULL DEFAULT NULL,
  PRIMARY KEY ("id")
  );
  CREATE INDEX IF NOT EXISTS "driver_database_name_name_idx" ON driver ("first_name", "last_name");

Possible solution

Environment

This has been tried in several version 9 databases.

• HeidiSQL version:
  11.0.0.5978

• Database system and version:
  PostgreSQL 9.4

• Operating system:
  Windows 10.