Support Int4[]

[ItalicJerrold]

I used Postgres, and found this generation does not support int4[]. The following is what I got:
type: _INT4 error: unknown sql type: _int4

[ItalicJerrold]

Also how to contribute code, if I want to add this support myself, what should I take care of?

[smallnest]

I don't know int4[] in postgres, but I think you can define a new type for int4[]:

https://github.com/smallnest/gen/blob/master/template/mapping.json