singhpk234 commented on PR #13879:
URL: https://github.com/apache/iceberg/pull/13879#issuecomment-4271779915
```
{
"read-restrictions": {
"required-column-projections": [
{ "field-id": 4, "action": "show-last-4" },
{ "field-id": 6, "action": "replace-with-null" },
{ "field-id": 8, "action": "truncate-to-year" },
{ "field-id": 10, "action": "sha-256-global" },
{ "field-id": 12, "action": "mask-alphanum" }
],
"required-row-filter": {
"type": "eq",
"term": "department",
"value": "Engineering"
}
}
}
```
Pr description to be updated soon, will update the text too with deeper look
We also have a propsal for expression expansion which will enabled
expression to have `ref` so that its protected by column rename / drop also
will expand referencing udfs inside it
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