postgresql_grant resource should allow empty list of privileges

[kamil-rogon-dragon]

Hi there,
This is probably a feature request.

Terraform Version

Terraform v0.12.29
+ provider.postgresql v1.7.1

Affected Resource(s)

Please list the resources as a list, for example:

• postgresql_grant

Terraform Configuration Files

resource "postgresql_database" "this" {
  name  = var.name
  owner = var.main_username
}

resource "postgresql_grant" "database_to_public" {
  object_type = "database"
  database    = postgresql_database.this.name
  role        = "public"
  privileges  = []
}

Expected Behavior

It should be possible to have empty list of privileges, that is equivalent of "REVOKE ALL". This would allow to delete some default permission that postgresql creates (ex. for public schema).

Actual Behavior

TF validation for privilege parameter is set to MinItems=1 and returns an error.

Steps to Reproduce

Please list the steps required to reproduce the issue, for example:

1. terraform plan

[david-ecc]

Same problem here, i need to remove access to databases for all users ('REVOKE ALL ON DATABASE XXX FROM PUBLIC').