By default, Apache Hive uses a built-in Derby SQL server for this purpose. We can have a different type of Clauses associated with Hive to perform different type data manipulations and querying. By default, Hive uses a built-in Derby SQL server. This chapter explains how to use the SELECT statement with WHERE clause. Use MYSQL as Meta storage at backend to connect multiple users with Hive at a time So in the example you provided you will have to change the query to look something like below: SELECT * FROM "TBLS"; HTH The Hive Query Language (HiveQL) is a query language for Hive to process and analyze structured data in a Metastore. Hive provides SQL type querying language for the ETL purpose on top of Hadoop file system.. Hive Query language (HiveQL) provides SQL type environment in Hive to work with tables, databases, queries. In PostgreSQL to access these upper case objects you have to quote those objects. Azure Databricks uses an earlier version of Hive Metastore (version 0.13), so this bug occurs when there is too much metadata for a column, such as an imported JSON schema. WARN Query: Query for candidates of org.apache.hadoop.hive.metastore.model.MDatabase and subclasses resulted in no possible candidates Required table missing: "DBS" in Catalog "" Schema "". Why to Use MySQL in Hive as Metastore: By Default, Hive comes with derby database as metastore. This is a bug that was fixed in Hive Metastore version 2.3.0 . Solution. You can implement the Hive Metastore using the tables in a relational database such as MySQL. You can use CTAS to create an AWS Glue table from a query on an external Hive metastore, but not to create a table on an external Hive metastore.. You can use INSERT INTO to insert data into an AWS Glue table from a query on an external Hive metastore, but not to insert data into an external Hive metastore. SELECT statement is used to retrieve the data from a table. All Hive implementations need a metastore service, where it stores metadata. The Thrift interfaces include Drivers, which are processes that interpret the query. Starting from Spark 1.4.0, a single binary build of Spark SQL can be used to query different versions of Hive metastores, using the … As a workaround, set up an external Hive metastore that uses version 2.3.0 or above. The hive metastore DB is a normal MySQL/etc database with a hive schema in it. Derby is the default database for the Hive metastore. The hive schema holds the hive tables though. It is implemented using tables in a relational database. DataNucleus requires this table to perform its persistence operations. @Vishal Prakash Shah The Hive Metastore database in PgSQL uses upper case object names. The Working Query. All the metadata for Hive tables and partitions are accessed through the Hive Metastore. Hive translates the hive queries into MapReduce programs. 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