{"action":"created","issue":{"url":"https://api.github.com/repos/pingcap/tidb/issues/1740","repository_url":"https://api.github.com/repos/pingcap/tidb","labels_url":"https://api.github.com/repos/pingcap/tidb/issues/1740/labels{/name}","comments_url":"https://api.github.com/repos/pingcap/tidb/issues/1740/comments","events_url":"https://api.github.com/repos/pingcap/tidb/issues/1740/events","html_url":"https://github.com/pingcap/tidb/pull/1740","id":177758411,"number":1740,"title":"support projection elimination","user":{"login":"XuHuaiyu","id":9039012,"avatar_url":"https://avatars.githubusercontent.com/u/9039012?v=3","gravatar_id":"","url":"https://api.github.com/users/XuHuaiyu","html_url":"https://github.com/XuHuaiyu","followers_url":"https://api.github.com/users/XuHuaiyu/followers","following_url":"https://api.github.com/users/XuHuaiyu/following{/other_user}","gists_url":"https://api.github.com/users/XuHuaiyu/gists{/gist_id}","starred_url":"https://api.github.com/users/XuHuaiyu/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/XuHuaiyu/subscriptions","organizations_url":"https://api.github.com/users/XuHuaiyu/orgs","repos_url":"https://api.github.com/users/XuHuaiyu/repos","events_url":"https://api.github.com/users/XuHuaiyu/events{/privacy}","received_events_url":"https://api.github.com/users/XuHuaiyu/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":3,"created_at":"2016-09-19T11:14:31Z","updated_at":"2016-09-29T09:31:59Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/pingcap/tidb/pulls/1740","html_url":"https://github.com/pingcap/tidb/pull/1740","diff_url":"https://github.com/pingcap/tidb/pull/1740.diff","patch_url":"https://github.com/pingcap/tidb/pull/1740.patch"},"body":"This commit eliminates PROJECTION operator in expression like\r\n\r\n> select a as c1, b as c2 from t where c1 > 0 and c2 < 0;\r\n\r\nWith this commit, the time cost of in-memory copy in PROJECTION iterator could be avoided.\r\n\r\n@shenli @hanfei1991 @coocood @zimulala @tiancaiamao  PTAL"},"comment":{"url":"https://api.github.com/repos/pingcap/tidb/issues/comments/250417079","html_url":"https://github.com/pingcap/tidb/pull/1740#issuecomment-250417079","issue_url":"https://api.github.com/repos/pingcap/tidb/issues/1740","id":250417079,"user":{"login":"coocood","id":891222,"avatar_url":"https://avatars.githubusercontent.com/u/891222?v=3","gravatar_id":"","url":"https://api.github.com/users/coocood","html_url":"https://github.com/coocood","followers_url":"https://api.github.com/users/coocood/followers","following_url":"https://api.github.com/users/coocood/following{/other_user}","gists_url":"https://api.github.com/users/coocood/gists{/gist_id}","starred_url":"https://api.github.com/users/coocood/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/coocood/subscriptions","organizations_url":"https://api.github.com/users/coocood/orgs","repos_url":"https://api.github.com/users/coocood/repos","events_url":"https://api.github.com/users/coocood/events{/privacy}","received_events_url":"https://api.github.com/users/coocood/received_events","type":"User","site_admin":false},"created_at":"2016-09-29T09:31:58Z","updated_at":"2016-09-29T09:31:58Z","body":"reorder schema introduced too much complexity, it's bug prone, not worth it. "}}
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