Look at REMOVING id column from cache tables
This is a continuation of the "In Progress" JIRA https://issues.civicrm.org/jira/browse/CRM-19385
which aimed at removing the id from the cache tables but unfortunately was never completed since I see we still have id column in all the cache tables.
civicrm_acl_cache civicrm_acl_contact_cache civicrm_cache civicrm_group_contact_cache civicrm_prevnext_cache civicrm_relationship_cache
Related PRs -
- https://github.com/civicrm/civicrm-core/pull/9743 (Closed)
- https://github.com/civicrm/civicrm-core/pull/9801 (Closed)
- https://github.com/civicrm/civicrm-core/pull/10019 (Merged) - This removed the dependency in the code so think we can start by removing the column directly.