{"action":"created","comment":{"url":"https://api.github.com/repos/apache/spark/pulls/comments/39474444","id":39474444,"diff_hunk":"@@ -41,10 +41,7 @@ infer_type <- function(x) {\n   if (type == \"map\") {\n     stopifnot(length(x) > 0)\n     key <- ls(x)[[1]]\n-    list(type = \"map\",\n-         keyType = \"string\",\n-         valueType = infer_type(get(key, x)),\n-         valueContainsNull = TRUE)\n+    paste0(\"map<string,\", infer_type(get(key, x)), \">\")","path":"R/pkg/R/SQLContext.R","position":8,"original_position":8,"commit_id":"748fb070a4da9a920d43bb332c6a1827b183d21c","original_commit_id":"748fb070a4da9a920d43bb332c6a1827b183d21c","user":{"login":"sun-rui","id":2528327,"avatar_url":"https://avatars.githubusercontent.com/u/2528327?v=3","gravatar_id":"","url":"https://api.github.com/users/sun-rui","html_url":"https://github.com/sun-rui","followers_url":"https://api.github.com/users/sun-rui/followers","following_url":"https://api.github.com/users/sun-rui/following{/other_user}","gists_url":"https://api.github.com/users/sun-rui/gists{/gist_id}","starred_url":"https://api.github.com/users/sun-rui/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/sun-rui/subscriptions","organizations_url":"https://api.github.com/users/sun-rui/orgs","repos_url":"https://api.github.com/users/sun-rui/repos","events_url":"https://api.github.com/users/sun-rui/events{/privacy}","received_events_url":"https://api.github.com/users/sun-rui/received_events","type":"User","site_admin":false},"body":"There is no way to infer it is nullable or not. So it is always TRUE. Removing it does not affect functionality.","created_at":"2015-09-15T04:51:53Z","updated_at":"2015-09-15T04:51:53Z","html_url":"https://github.com/apache/spark/pull/8711#discussion_r39474444","pull_request_url":"https://api.github.com/repos/apache/spark/pulls/8711","_links":{"self":{"href":"https://api.github.com/repos/apache/spark/pulls/comments/39474444"},"html":{"href":"https://github.com/apache/spark/pull/8711#discussion_r39474444"},"pull_request":{"href":"https://api.github.com/repos/apache/spark/pulls/8711"}}},"pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/8711","id":44742705,"html_url":"https://github.com/apache/spark/pull/8711","diff_url":"https://github.com/apache/spark/pull/8711.diff","patch_url":"https://github.com/apache/spark/pull/8711.patch","issue_url":"https://api.github.com/repos/apache/spark/issues/8711","number":8711,"state":"open","locked":false,"title":"[SPARK-10050][SPARKR] Support collecting data of MapType in DataFrame.","user":{"login":"sun-rui","id":2528327,"avatar_url":"https://avatars.githubusercontent.com/u/2528327?v=3","gravatar_id":"","url":"https://api.github.com/users/sun-rui","html_url":"https://github.com/sun-rui","followers_url":"https://api.github.com/users/sun-rui/followers","following_url":"https://api.github.com/users/sun-rui/following{/other_user}","gists_url":"https://api.github.com/users/sun-rui/gists{/gist_id}","starred_url":"https://api.github.com/users/sun-rui/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/sun-rui/subscriptions","organizations_url":"https://api.github.com/users/sun-rui/orgs","repos_url":"https://api.github.com/users/sun-rui/repos","events_url":"https://api.github.com/users/sun-rui/events{/privacy}","received_events_url":"https://api.github.com/users/sun-rui/received_events","type":"User","site_admin":false},"body":"1. Support collecting data of MapType from DataFrame.\r\n2. Support data of MapType in 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