Get execution plan details connected to a given data source

[wajda]

From feature request : #793

This is the second API : /data-source/{ds_id}/execution-plan-ids?access=write -- returns an array of the exec plans that writes into the given source.

I have changed the API signature to return names of execution plan instead of ids

/data-source/{ds_id}/execution-plan-name

Read
Access
If none provided, supplies information on both depends and affects

Originally posted by @mohanajuhi166 in #803 (comment)