The directory is deleted if there are no tables. None of the above. By default, Hive won’t permit you to drop a database if it contains tables. The default behaviour is RESTRICT, where DROP DATABASE will fail if the database is not empty. Let's see the cascade command used to drop the database:- This command automatically drops the tables present in the database first. With the help of the below command, we can add database properties or modify the properties we have added.DBPROPERTIES takes multiple arguments in the form of a key-value pair.. Syntax: DATABASE or SCHEMA is the same thing we can use any name. ... What is the default database provided by Apache Hive for metastore? While reading about the USE command I saw 2 usage. In such a case, we can drop the database either by dropping tables first or use Cascade keyword with the command. 5G Network; Agile; ... By default when a database is dropped in Hive. Point out the correct statement. Point out the correct statement; Point out the wrong statement: Hive converts queries to all except; In Hive, it is not allowed to drop the database that contains the tables directly. Correct! The tables are also deleted. Now you are prepared to face Hive interview. SCHEMA in ALTER is added in hive 0.14.0 and later. Instead it uses a hive metastore directory to store any tables created in the default database. Hue Health Status: 3. I am new to Hive and I was going through the commands. Wrong! 4. Because the default database is always available, issuing USE default is a convenient way to leave the current database before dropping it. Hive considerations: When you drop a database in Impala, the database can no longer be used by Hive. Q.8 By default when a database is dropped in Hive. Hive stores metadata by default in Hive stores metadata by default in. To drop the tables in the database as well, use DROP DATABASE … with CASCADE option. None of the above. You can either drop the tables first or append the CASCADE keyword to the command, which will cause the Hive to drop the tables in the database first: hive> DROP DATABASE IF EXISTS financials CASCADE; The directory is deleted if there are no tables. As @congyh suggests, you can remove the data in the HDFS directory manually with hadoop fs -rm -r -skipTrash and drop db.table; As of Hive 0.11.0, you can also truncate the tables (delete HDFS data) before dropping them from the metastore. asked Apr 3, 2020 in Big Data | Hadoop by Tate. By default, Hive is in RESTRICT mode and if you want to drop a database with tables, then you'll have to use the CASCADE mode. Wrong! Q.9 The main advantage of creating table partition is. So, let’s some Hive interview questions. The HDFS blocks are formatted. USE database_name; USE DEFAULT; My question is that when I use the default database, how will I know which database I am using? Hive Logs: 2. Effective storage memory utilization. Q.15 By default when a database is dropped in Hive. The HDFS blocks are formatted. Step 2: Launch Hive hive ALTER Database Command 1. Hi. Is there a way to know which is the default database? We can specify particular location while creating database in hive using LOCATION clause. The tables are also deleted. The HDFS data stored on disk and the table definitions in the Hive metastore are distinct entities. By default when a database is dropped in Hive: Explode in Hive is used to convert complex data types into desired table formats. Correct! I don't think Hive Metastore server have good health as show in image1. There are two modes of dropping databases in Hive: RESTRICT and CASCADE. Hive CLI was working earlier, but currently not … Categories . 1. This behavior is because Hive by default doesn't let you drop database containing any tables. One exception to this is the default database in Hive which does not have a directory. Below is the example of drop database in Hive: hive> drop database test_db; OK Time taken: 1.474 seconds Hadoop Hive Rename Database Command
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