If the TTA is 0 because the call was answered in less than a second (so that the answer_epoch and start_epoch are in the same second), it would not display the TTA at all. This is safe to include 0 because "unanswered" calls are going to have a TTA that is is the negative value of the start time, significantly lower than 0.
Changes
--------
- Improve CDR Import Logic so that missed_call column is more accurate to the "missed" status. It would previously mark unanswered outbound calls as "missed". These are their own category of call.
- Don't mark the CDRs of the "legs" of an Enterprise Ring Group call as missed, only the originating_leg will be marked (one missed call per call) - We could also just "skip" importing these call legs. Simultaneous ring groups don't have these duplicated CDRs for every ringing phone. The "Skip" approach might make most of the rest of this work irrelevant.
- Create `originating_leg_uuid` column in v_xml_cdr and import it into the database during CDR imports so it is available for filtering Enterprise Ring Group calls out of CDRs and reports.
- Move logic that hides the agent leg of CC calls, LOSE_RACE calls, and the Enterprise Leg hiding code from xml_cdr.php into xml_cdr_inc.php into the SQL query WHERE clause so the CDR page looks more consistent. The logic is the same, but these calls are now excluded from the query result entirely instead of having to "skip" rendering them in the list on the xml_cdr.php page.
- Improved CDR statistics page to use the missed_call variable instead of relying upon billsec and answer_stamp/answer_epoch. Added the same logic as the xml_cdr pages to the query so it excludes enterprise ring group call legs.
- Laid the query groundwork in xml_cdr_statistics to report on Average TTA (No UI changes yet to include that statistic)
Retroactive Changes
---------------------
There are a few changes going back in time to bring everything in line with this better reporting accuracy:
- If you want the populated the `originating_leg_uuid column` in `v_xml_cdr`, it will rely upon having the `json` column and not having deleted the data from it like I know some people do for space saving.
- If you don't have the json column, you are mostly out of luck for hiding the duplicate legs of Enterprise ring group calls. It might be possible, but it isn't going to be easy.
- On Newer Versions of postgres, this works:
```
UPDATE v_xml_cdr SET originating_leg_uuid = (json->'variables'->>'originating_leg_uuid')::uuid WHERE json->'variables'->>'originating_leg_uuid' IS NOT NULL;
```
- For some reason on postgres 9.4, I had to UPDATE every single record because I couldn't get it to allow the json syntax properly after the WHERE. This is fine, it doesn't change the end result it just means it has to run the UPDATE on every record, which will take a while
```
UPDATE v_xml_cdr SET originating_leg_uuid = (json->'variables'->>'originating_leg_uuid')::uuid;
```
- To remove the `missed_call = true` on all your previous outbound records so that they don't show up when you filter on missed (outbound unanswered calls can be accurately listed with TTA max 0 and direction outbound)
```
UPDATE v_xml_cdr SET missed_call = false WHERE direction = 'outbound' AND missed_call = true;
```
storage_type was never initialized as a setting in the database due to the y counter being reset to 0 after it. This was causing the storage_type setting to not show up in the UI.
