I would like to confirm the cost of a projection query. According to https://cloud.google.com/appengine/pricing the cost of a project query is 1 read operation while a a normal query getting the whole entity is 1 read + 1 read per entity retrieved.
If I have entities in this structure: MyEntity -ID -Name -Birthday If I select do a projection query to get retrieve the ID and Name of everyone who's birthday is greater than a some date lets say Jan 1st 2000. If there are 100 entities which match does the return only count as 1 read to get all 100 entities back? If this is the case then say I also want to retrieve the birthday property, but don't wan't to select all the properties to avoid a query which gets the whole entity then why not then add a dummy property that has no use to the entities so then you can still select all the properties I need (ID,Name, and Birthday) and still only use 1 read operation. If I did a query to select all the properties of a user who's birthday is greater than a some date lets say Jan 1st 2000. If there are 100 entities which match does the return will costs be 1 + 100 read operations? Cheers -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/6f6b6f39-e936-4f62-a960-90bbabed1907%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
