All Hive implementations need a metastore service, where it stores metadata. The Hive properties to implicitly create or alter the existing schema are disabled by default. This article will go through the steps to upgrade metastore schema using Hive schema tool, taking PostgreSQL for example. 2. For versions below Hive 2.0, add the metastore tables with the following configurations in your existing init script: The reason for this issue is that the Hive Metastore cannot access the Hive database. It provides client access to this information by using metastore service API. Metastores. 2. The hive metastore DB is a normal MySQL/etc database with a hive schema in it. It stores metadata for Hive tables (like their schema and location) and partitions in a relational database. Schematool is a offline command line tool to manage the metastore.. This is the link to metastore ER diagram. If the external metastore version is Hive 2.0 or above, use the Hive Schema Tool to create the metastore tables. Solution. Before Hive 0.12, we have to manually run the upgrade DDL SQL files in the metastore database. So, the information schema is irrelevant to hive; to get the hive table details, you have to interrogate the TBLS table, for example. The hive schema holds the hive tables though. Metastore is the central repository of Apache Hive metadata. Hive now records the schema version in the metastore database and verifies that the metastore schema version is compatible with the Hive binaries that are going to access the metastore. 17/09/10 23:13:41 WARN metastore.ObjectStore: Version information not found in metastore. You might find the original Hive paper useful. Every Databricks deployment has a central Hive metastore accessible by all clusters to persist table metadata. What is Hive Metastore? Use the Metastore command-line schematool to upgrade or validate the metastore database schema for unmanaged clusters.. It is implemented using tables in a relational database. The following example creates an external schema using a Hive metastore database named hive_db. Instead of using the Databricks Hive metastore, you have the option to use an existing external Hive metastore instance or the AWS Glue Catalog. Note: If you are using Cloudera Manager to manage your clusters, the Metastore schematool is also available in the Hive service page to validate or upgrade the metastore:. Upgrade the schema from an older version to current. 3. Hive-Metastore. In the CREATE EXTERNAL SCHEMA statement, specify FROM HIVE METASTORE and include the metastore's URI and port number. I would also suggest you to browse through the official Hive documentation and read the good book Programming Hive. This tool can be used to initialize the metastore schema for the current Hive version. hive.metastore.schema.verification is not enabled so recording the schema version 1.1.0-cdh5.12.0 17/09/10 23:13:42 WARN metastore.ObjectStore: Failed to get database default, returning NoSuchObjectException The Hive Metastore destination compares information in metadata records with Hive tables, and then creates or updates the tables as needed. By default, Hive uses a built-in Derby SQL server. From the Cloudera Manager Admin console, select the Hive service. Verify if the metastore schema version is compatible with Hive binaries. Version to current tables ( like their schema and location ) and partitions in a relational database manually run upgrade! Schematool is a normal MySQL/etc database with a Hive metastore destination compares information in metadata with. Hive service i would also suggest you to browse through the official Hive documentation and read the good book Hive... 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