saihemanth-cloudera commented on code in PR #4601:
URL: https://github.com/apache/hive/pull/4601#discussion_r1294041436
##########
ql/src/java/org/apache/hadoop/hive/ql/security/authorization/plugin/AuthorizationMetaStoreFilterHook.java:
##########
@@ -162,20 +159,18 @@ private List<HivePrivilegeObject>
tableMetasToPrivilegeObjs(List<TableMeta> tabl
return objs;
}
- private ImmutablePair<String, String> tableMetaKey(String dbName, String
tableName) {
- return new ImmutablePair(dbName, tableName);
- }
-
@Override
public List<TableMeta> filterTableMetas(List<TableMeta> tableMetas) throws
MetaException {
List<HivePrivilegeObject> listObjs = tableMetasToPrivilegeObjs(tableMetas);
List<HivePrivilegeObject> filteredList = getFilteredObjects(listObjs);
- Set<ImmutablePair<String, String>> filteredNames = filteredList.stream()
- .map(e -> tableMetaKey(e.getDbname(), e.getObjectName()))
- .collect(Collectors.toSet());
- return tableMetas.stream()
- .filter(e -> filteredNames.contains(tableMetaKey(e.getDbName(),
e.getTableName())))
Review Comment:
The existing implementation's run time complexity is O(N) whereas the
suggested implementation's complexity is O(NlogN). So, I'm against changing
this part of the code.
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