{"action":"created","issue":{"url":"https://api.github.com/repos/JuliaOpt/MathOptInterface.jl/issues/234","repository_url":"https://api.github.com/repos/JuliaOpt/MathOptInterface.jl","labels_url":"https://api.github.com/repos/JuliaOpt/MathOptInterface.jl/issues/234/labels{/name}","comments_url":"https://api.github.com/repos/JuliaOpt/MathOptInterface.jl/issues/234/comments","events_url":"https://api.github.com/repos/JuliaOpt/MathOptInterface.jl/issues/234/events","html_url":"https://github.com/JuliaOpt/MathOptInterface.jl/issues/234","id":297976421,"number":234,"title":"Duplicate indices for coeffs","user":{"login":"joaquimg","id":13870065,"avatar_url":"https://avatars2.githubusercontent.com/u/13870065?v=4","gravatar_id":"","url":"https://api.github.com/users/joaquimg","html_url":"https://github.com/joaquimg","followers_url":"https://api.github.com/users/joaquimg/followers","following_url":"https://api.github.com/users/joaquimg/following{/other_user}","gists_url":"https://api.github.com/users/joaquimg/gists{/gist_id}","starred_url":"https://api.github.com/users/joaquimg/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/joaquimg/subscriptions","organizations_url":"https://api.github.com/users/joaquimg/orgs","repos_url":"https://api.github.com/users/joaquimg/repos","events_url":"https://api.github.com/users/joaquimg/events{/privacy}","received_events_url":"https://api.github.com/users/joaquimg/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":3,"created_at":"2018-02-17T03:53:54Z","updated_at":"2018-02-17T19:45:43Z","closed_at":null,"author_association":"OWNER","body":"Gurobi, CPLEX, Xpress and GLPK do not accept duplicate indices natively when adding constraints.\r\n\r\nI think that forcing all solvers to allow duplicate indices in constraints is an unnecessary overhead for adding constraints.\r\n\r\nJuMP used to collect those, is it still true?"},"comment":{"url":"https://api.github.com/repos/JuliaOpt/MathOptInterface.jl/issues/comments/366466483","html_url":"https://github.com/JuliaOpt/MathOptInterface.jl/issues/234#issuecomment-366466483","issue_url":"https://api.github.com/repos/JuliaOpt/MathOptInterface.jl/issues/234","id":366466483,"user":{"login":"joaquimg","id":13870065,"avatar_url":"https://avatars2.githubusercontent.com/u/13870065?v=4","gravatar_id":"","url":"https://api.github.com/users/joaquimg","html_url":"https://github.com/joaquimg","followers_url":"https://api.github.com/users/joaquimg/followers","following_url":"https://api.github.com/users/joaquimg/following{/other_user}","gists_url":"https://api.github.com/users/joaquimg/gists{/gist_id}","starred_url":"https://api.github.com/users/joaquimg/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/joaquimg/subscriptions","organizations_url":"https://api.github.com/users/joaquimg/orgs","repos_url":"https://api.github.com/users/joaquimg/repos","events_url":"https://api.github.com/users/joaquimg/events{/privacy}","received_events_url":"https://api.github.com/users/joaquimg/received_events","type":"User","site_admin":false},"created_at":"2018-02-17T19:45:43Z","updated_at":"2018-02-17T19:45:43Z","author_association":"OWNER","body":"I am not sure how or if JuMP would use it. But someone that need to add a bunch of constraints (like cuts) where no duplicates are guaranteed they could go directly through the MOI level. If that is desired in JuMP later one, it could be a keyword or a separate macro."}}
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