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Review request for sentry, kalyan kumar kalvagadda and Vihang Karajgaonkar. Bugs: sentry-2540 https://issues.apache.org/jira/browse/sentry-2540 Repository: sentry Description ------- When there are thousands of databases, SHOW DATABASES may take a really long time because SENTRY checks if user has any of the following privileges on that database for filtering out the database DBModelAction.SELECT, DBModelAction.INSERT, DBModelAction.ALTER, DBModelAction.CREATE, DBModelAction.DROP, DBModelAction.INDEX, DBModelAction.LOCK To speedup the authorization checking for this case, Sentry can check only the select privilege for SHOW DATABASES and SHOW TABLES based on configuration. Diffs ----- sentry-binding/sentry-binding-hive-conf/src/main/java/org/apache/sentry/binding/hive/conf/HiveAuthzConf.java 5c43329 sentry-binding/sentry-binding-hive/src/main/java/org/apache/sentry/binding/hive/authz/MetastoreAuthzObjectFilter.java e64d1a5 Diff: https://reviews.apache.org/r/71901/diff/1/ Testing ------- manually set the configuration to be true, and see only select action is used for authorization check Thanks, Na Li