{"action":"created","issue":{"url":"https://api.github.com/repos/pandas-dev/pandas/issues/20673","repository_url":"https://api.github.com/repos/pandas-dev/pandas","labels_url":"https://api.github.com/repos/pandas-dev/pandas/issues/20673/labels{/name}","comments_url":"https://api.github.com/repos/pandas-dev/pandas/issues/20673/comments","events_url":"https://api.github.com/repos/pandas-dev/pandas/issues/20673/events","html_url":"https://github.com/pandas-dev/pandas/issues/20673","id":313914793,"number":20673,"title":"Use select_column if possible when read_hdf","user":{"login":"dzubo","id":17483516,"avatar_url":"https://avatars3.githubusercontent.com/u/17483516?v=4","gravatar_id":"","url":"https://api.github.com/users/dzubo","html_url":"https://github.com/dzubo","followers_url":"https://api.github.com/users/dzubo/followers","following_url":"https://api.github.com/users/dzubo/following{/other_user}","gists_url":"https://api.github.com/users/dzubo/gists{/gist_id}","starred_url":"https://api.github.com/users/dzubo/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dzubo/subscriptions","organizations_url":"https://api.github.com/users/dzubo/orgs","repos_url":"https://api.github.com/users/dzubo/repos","events_url":"https://api.github.com/users/dzubo/events{/privacy}","received_events_url":"https://api.github.com/users/dzubo/received_events","type":"User","site_admin":false},"labels":[{"id":47229190,"url":"https://api.github.com/repos/pandas-dev/pandas/labels/IO%20HDF5","name":"IO HDF5","color":"5319e7","default":false},{"id":8935311,"url":"https://api.github.com/repos/pandas-dev/pandas/labels/Performance","name":"Performance","color":"a10c02","default":false}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2018-04-12T22:55:06Z","updated_at":"2018-04-15T19:53:04Z","closed_at":null,"author_association":"NONE","body":"If in `pd.read_hdf(..., columns=['col_name], ...)` we have only one column, then it would be much faster to use `store.select_column()` instead of `store.column()`.\r\n\r\nhttps://github.com/pandas-dev/pandas/blob/fa231e8766e02610ae5a45e4b2bc90b6c7e9ee6f/pandas/io/pytables.py#L368\r\n\r\nAny caveats on implementing this?"},"comment":{"url":"https://api.github.com/repos/pandas-dev/pandas/issues/comments/381433225","html_url":"https://github.com/pandas-dev/pandas/issues/20673#issuecomment-381433225","issue_url":"https://api.github.com/repos/pandas-dev/pandas/issues/20673","id":381433225,"user":{"login":"gfyoung","id":9273653,"avatar_url":"https://avatars0.githubusercontent.com/u/9273653?v=4","gravatar_id":"","url":"https://api.github.com/users/gfyoung","html_url":"https://github.com/gfyoung","followers_url":"https://api.github.com/users/gfyoung/followers","following_url":"https://api.github.com/users/gfyoung/following{/other_user}","gists_url":"https://api.github.com/users/gfyoung/gists{/gist_id}","starred_url":"https://api.github.com/users/gfyoung/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gfyoung/subscriptions","organizations_url":"https://api.github.com/users/gfyoung/orgs","repos_url":"https://api.github.com/users/gfyoung/repos","events_url":"https://api.github.com/users/gfyoung/events{/privacy}","received_events_url":"https://api.github.com/users/gfyoung/received_events","type":"User","site_admin":false},"created_at":"2018-04-15T19:53:04Z","updated_at":"2018-04-15T19:53:04Z","author_association":"MEMBER","body":"Not that I know of.  Go for it!"}}
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