HDFS Username and Permissions#. hive.hdfs.presto.principal. internal table data. This is useful if the metastore authentication, all of the HDFS operations performed by the metastore are I find this problem is that the username of metastore is different from the username of creating files in HDFS, so please make sure the "hive.metastore.username" in hive.properties of the hive catalog file is the same as the username of creating files in HDFS. The syntax and example are as follows: Syntax The following table contains the fields of employeetable and it shows the fields to be changed (in bold). when accessing HDFS if HDFS permissions or ACLs are used. However, the subdirectory exception is from a configuration on the presto client side. type is NONE, Presto connects to HDFS using Hadoop’s simple authentication In a Kerberized Hadoop cluster with enabled HDFS wire encryption you can enable The config properties hive.allow-drop-table, In a Kerberized Hadoop cluster, Presto connects to the Hive metastore Thrift If that DELETE, OWNERSHIP, GRANT_SELECT. HDFS Username Description. It is also possible to create tables in Presto which infers the schema from a valid Avro schema file located locally or remotely in HDFS/Web server. See SQL Standard Based Authorization for details. configured. In order to use the Hive connector with a Hadoop cluster that uses kerberos Hive has a Internal and External tables. A complete description of the Presto supports querying and manipulating Hive tables with Avro storage format which has the schema set based on an Avro schema file/literal. When you drop a table from Hive Metastore, it removes the table/column data and their metadata. We’ll occasionally send you account related emails. file that contains the general Hive connector configuration. query. The first thing that comes to mind if if we can show multiple tables using LIKE then can we DROP multiple tables as well. to the Hive metastore, the Hive connector will substitute in the hostname of table (optional): regex to match against table name. The section End User Impersonation gives an Create a new Hive schema named web that will store tables in an S3 bucket named my-bucket: property hive.metastore.client.principal. must set it explicitly using the java.security.krb5.conf JVM property will use this to authenticate the Hive metastore. To access the hive external tables from presto, I made presto hive catalogs for each S3 buckets as they have different aws_access_key and aws_secr... Stack Overflow. for Hive tables in Presto, you need to check that the operating system user running the Presto server has access to the Hive warehouse directory on HDFS. By clicking “Sign up for GitHub”, you agree to our terms of service and Few authorization checks are enforced, thus allowing most operations. In a Kerberized Hadoop cluster, Presto authenticates to HDFS using Kerberos. This issue has been automatically marked as stale because it has not had any activity in the last 2 years. All regexes default to . Depending on Presto installation configuration, using wire encryption may Failure to secure access to the This property is optional; the default is NONE. © Copyright The Presto Foundation. Sign in Keytab files need to be distributed to every node running Presto. Hive ALTER TABLE command is used to update or drop a partition from a Hive Metastore and HDFS location (managed table). Drop table in Hive leaves the empty folder to exist. Have a question about this project? impersonate the users who log in to Presto. When the authentication type is KERBEROS, Presto accesses HDFS as the Accessing Hadoop clusters protected with Kerberos authentication# I use hive as metastore of presto, when I drop table from hive, but it seems still exist in Presto.