[OBS] Boundaries query templates need parenthesis fix

While resolving some questions about OBS functions and integration we found out an issue with one of the query templates. These templates with the OR clause:

https://github.com/CartoDB/cartodb/blob/d8614f137cab6980a9fe8fd18f5d6a833ec98a66/lib/assets/core/javascripts/cartodb3/data/data-observatory/boundaries-collection.js#L5-L11

shall include parenthesis to enforce the correct precedence:

SELECT * FROM OBS_GetAvailableGeometries(
  ST_MakeEnvelope(-74, 41, -73, 40, 4326),
  NULL,
  <numer_id>,
  <denom_id>, 
  <timespan_id>
) denoms
WHERE valid_numer IS TRUE
 AND (valid_denom IS TRUE OR <denom_id> IS NULL) -- edited
 AND valid_timespan IS TRUE

as explained in https://github.com/CartoDB/dataservices-api/issues/370#issuecomment-303959407

[nobuti]

Yes, internally denom_id is normalize 😃

[xavijam]

Could we close this then?