{"action":"created","issue":{"url":"https://api.github.com/repos/prestodb/presto/issues/11444","repository_url":"https://api.github.com/repos/prestodb/presto","labels_url":"https://api.github.com/repos/prestodb/presto/issues/11444/labels{/name}","comments_url":"https://api.github.com/repos/prestodb/presto/issues/11444/comments","events_url":"https://api.github.com/repos/prestodb/presto/issues/11444/events","html_url":"https://github.com/prestodb/presto/issues/11444","id":358081041,"node_id":"MDU6SXNzdWUzNTgwODEwNDE=","number":11444,"title":"Improve plan stability","user":{"login":"mbasmanova","id":27965151,"node_id":"MDQ6VXNlcjI3OTY1MTUx","avatar_url":"https://avatars3.githubusercontent.com/u/27965151?v=4","gravatar_id":"","url":"https://api.github.com/users/mbasmanova","html_url":"https://github.com/mbasmanova","followers_url":"https://api.github.com/users/mbasmanova/followers","following_url":"https://api.github.com/users/mbasmanova/following{/other_user}","gists_url":"https://api.github.com/users/mbasmanova/gists{/gist_id}","starred_url":"https://api.github.com/users/mbasmanova/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mbasmanova/subscriptions","organizations_url":"https://api.github.com/users/mbasmanova/orgs","repos_url":"https://api.github.com/users/mbasmanova/repos","events_url":"https://api.github.com/users/mbasmanova/events{/privacy}","received_events_url":"https://api.github.com/users/mbasmanova/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":1,"created_at":"2018-09-07T14:06:12Z","updated_at":"2018-09-12T18:37:04Z","closed_at":null,"author_association":"CONTRIBUTOR","body":"Currently, the output of `explain <query>` may change even if neither query nor environment changed. There are at least two causes:\r\n\r\n- UUIDs printed in `TableCommit[catalog:HiveTransactionHandle{uuid=19a6c34d-9ab8-4e16-8d93-b010d244be66}...`\r\n\r\n- Partition columns printed in random order (due to `hiveColumnIndex = -1`)\r\n\r\n```\r\nHiveColumnHandle{name=ts, hiveType=string, hiveColumnIndex=-1, columnType=PARTITION_KEY, comment=}\r\nHiveColumnHandle{name=ds, hiveType=string, hiveColumnIndex=-1, columnType=PARTITION_KEY, comment=YYYY-MM-DD}\r\n```\r\n\r\nThis makes it difficult to compare plans with and without CBO. \r\n\r\nHence, let's make the order of partition columns deterministic and remove UUIDs from the plan.\r\n\r\nCC: @rschlussel\r\n"},"comment":{"url":"https://api.github.com/repos/prestodb/presto/issues/comments/420753810","html_url":"https://github.com/prestodb/presto/issues/11444#issuecomment-420753810","issue_url":"https://api.github.com/repos/prestodb/presto/issues/11444","id":420753810,"node_id":"MDEyOklzc3VlQ29tbWVudDQyMDc1MzgxMA==","user":{"login":"mbasmanova","id":27965151,"node_id":"MDQ6VXNlcjI3OTY1MTUx","avatar_url":"https://avatars3.githubusercontent.com/u/27965151?v=4","gravatar_id":"","url":"https://api.github.com/users/mbasmanova","html_url":"https://github.com/mbasmanova","followers_url":"https://api.github.com/users/mbasmanova/followers","following_url":"https://api.github.com/users/mbasmanova/following{/other_user}","gists_url":"https://api.github.com/users/mbasmanova/gists{/gist_id}","starred_url":"https://api.github.com/users/mbasmanova/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mbasmanova/subscriptions","organizations_url":"https://api.github.com/users/mbasmanova/orgs","repos_url":"https://api.github.com/users/mbasmanova/repos","events_url":"https://api.github.com/users/mbasmanova/events{/privacy}","received_events_url":"https://api.github.com/users/mbasmanova/received_events","type":"User","site_admin":false},"created_at":"2018-09-12T18:37:04Z","updated_at":"2018-09-12T18:37:04Z","author_association":"CONTRIBUTOR","body":"Thank you, @natewoodfb "}}
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