How to get `policy_summary` for `asset_group_asset`, `ad_group_ad`, and `keyword_view` using GAQL?

[Usman Aqil]

Hello Google Ads API Team,

I have been trying for days to fetch policy violation details (`approval_status`, `policy_topic_entries`, and `evidences`) for all campaign types using GAQL, but every query I try is failing with errors.

My goal is simple: I want to get the exact policy reasons for any asset, ad, or keyword that is "Not Approved" or "Approved (Limited)".

Here are the queries I have tried and the errors I am getting:

1. For Performance Max (`asset_group_asset`):

```
SELECT
    campaign.id,
    asset_group_asset.policy_summary.approval_status,
    asset_group_asset.policy_summary.policy_topic_entries
FROM asset_group_asset
WHERE asset_group_asset.policy_summary.approval_status != 'APPROVED'
```
Error: `PROHIBITED_FIELD_IN_SELECT_CLAUSE` for `asset_group_asset.policy_summary`.

2. For Standard Ads (`ad_group_ad`):

```
SELECT
    campaign.id,
    ad_group_ad.policy_summary.approval_status,
    ad_group_ad.policy_summary.policy_topic_entries
FROM ad_group_ad
WHERE ad_group_ad.policy_summary.approval_status != 'APPROVED'
```
Error: `PROHIBITED_FIELD_IN_SELECT_CLAUSE` for `ad_group_ad.policy_summary`.

3. For Keywords (`keyword_view`):

```
SELECT
    campaign.id,
    ad_group_criterion.policy_summary.approval_status,
    ad_group_criterion.policy_summary.policy_topic_entries
FROM keyword_view
WHERE ad_group_criterion.policy_summary.approval_status != 'APPROVED'
```Error: `UNRECOGNIZED_FIELD` for `ad_group_criterion.policy_summary.approval_status`.

---

I have tried every combination I can think of. It seems impossible to select `policy_summary` or its sub-fields from these resources.

Could you please provide the single, correct GAQL query for each of these three resources (`asset_group_asset`, `ad_group_ad`, and `keyword_view`) that will successfully return the policy violation details?

Thank you.