# Update Column Permissions

Updates column permissions by policy ID.

Endpoint: PATCH /access_control/policies/{policy_id}/column_permissions
Version: 3
Security: ApiKeyAuth

## Path parameters:

  - `policy_id` (integer, required)
    Example: 67

## Request fields (application/json):

  - `column_permissions` (array, required)

  - `column_permissions.tags` (array, required)

  - `column_permissions.except` (boolean,null)

  - `column_permissions.masking` (string,null)
    Enum: "hash"

## Response 200 fields (application/json):

  - `tags` (array, required)

  - `except` (boolean,null)

  - `masking` (string,null)
    Enum: "hash"