Create table syntax not working in hsql

Question

I am new to hsqldb. I am developing simple application to get the some input from user. So Searched for embedded database and found hsqldb is the solution for my requirement.

Answer 1

Use INT or INTEGER without specify the field length as it is not required for Int type fields. It is required for VARCHAR and DECIMALetc. type fields.

 CREATE TABLE  company (
   comp_name varchar(100) NOT NULL,
   comp_id int
 );

To auto increment:

 ALTER TABLE company ALTER COLUMN comp_id 
 SET GENERATED BY DEFAULT AS IDENTITY (START WITH 1, INCREMENT BY 1);

Alternatively:

 CREATE TABLE  company (
   comp_name varchar(100) NOT NULL,
   comp_id int GENERATED BY DEFAULT AS IDENTITY 
                                         (START WITH 1, INCREMENT BY 1) NOT NULL
 );

You may also add the PRIMARY_KEY as below:

 CREATE TABLE  company (
   comp_name varchar(100) NOT NULL,
   comp_id INTEGER NOT NULL,
   PRIMARY KEY (comp_id)
 );