Enrich DB tables with useful fields - Direction, Day of Week

[schnuerle]

Once the RDS is complete in Phase 1, we'd like to enrich the database with more fields that are useful. If you have special fields or views you need for your analysis, you can make a pull request to add support for it with examples to this repo so everyone can benefit. Use this issue as a place to discuss and collaborate.

[schnuerle]

Looking at adding jam direction. Suggestions for other fields welcome.

[schnuerle]

Add ew_direction and ns_direction fields to the jams table.

SQL to update existing rows with direction data:

update waze.jams set 
ew_direction =  
case  when (line -> 0 ->> 'x')::NUMERIC - (line -> jsonb_array_length(line)-1 ->> 'x')::numeric  > 0 then 
'W' else 'E' end 
where uuid in (select uuid from waze.jams where 
ew_direction is null limit 100);

 update waze.jams set 
 ns_direction =  
 case  when (line -> 0 ->> 'y')::NUMERIC - (line -> jsonb_array_length(line)-1 ->> 'y')::numeric  > 0 then 
 'S' else 'N' end
 where uuid in (select uuid from waze.jams where 
 ns_direction is null limit 100);
 

Remove where clause to update all of them, though this will take a long time.

[schnuerle]

Add a "dayofweek" field to Jams and Alerts.

See this commit: 8a47f61

Integer, 1-7. Corresponds to Monday - Sunday.

[schnuerle]

This is done in latest code.