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Showing posts with the label Hive

Troubleshooting Guide: Windows 11 Taskbar Not Showing - How to Fix It

  If your Windows 11 taskbar is not showing, you can try several troubleshooting steps to resolve the issue. Here are some potential solutions you can try:

How to Get a List of All Tables in HIVE?

  Photo by eberhard grossgasteiger: To get a list of all tables in Hive, you can use the SHOW TABLES command. Here's how to do it: sql SHOW TABLES; This will return a list of all tables in the current database. If you want to get more information about the tables, you can use the following query: sql SHOW TABLE EXTENDED; This will return the table name, information about the location of the table, the input format, output format, serialization format, table properties, and storage information for each table in the current database. Note that if you want to get a list of tables from a specific database, you can use the USE statement to switch to the desired database before running the SHOW TABLES or SHOW TABLE EXTENDED command. For example: sql USE my_database; SHOW TABLES; sql USE my_database; SHOW TABLE EXTENDED;

How to solve "Error while instantiating 'org.apache.spark.sql.hive.HiveSessionStateBuilder'" in HIVE?

The error message "Error while instantiating 'org.apache.spark.sql.hive.HiveSessionStateBuilder'" typically indicates an issue with the Hive configuration in Spark. Here are a few things you can try to resolve this issue: Check your Spark and Hive versions: Make sure that your Spark and Hive versions are compatible with each other. Check the compatibility matrix for your version of Spark to ensure that it is compatible with the version of Hive you are using. Check the classpath: Make sure that all the required jars for Hive are on the classpath. You can check this by running the following command: bash echo $CLASSPATH This should list all the jars on the classpath. If the required Hive jars are not present, you can add them to the classpath by setting the SPARK_CLASSPATH environment variable. Check the Hive configuration: Ensure that the Hive configuration is set correctly. You can do this by checking the hive-site.xml file in the Hive configuration directory. Ens

How to create a new table in HIVE?

To create a new table in HIVE, you can use the CREATE TABLE statement. Here's the basic syntax: CREATE TABLE table_name ( column1 datatype [optional_parameters] [column_constraint] , column2 datatype [optional_parameters] [column_constraint] , column3 datatype [optional_parameters] [column_constraint] , ... [table_constraint] ) [PARTITIONED BY (partition_column1 datatype, partition_column2 datatype, ...)] [CLUSTERED BY (clustered_column_name) [SORTED BY (sorting_column_name [ASC|DESC] ), ...] INTO num_buckets BUCKETS]; Here's an example that creates a new table named employees : CREATE TABLE employees ( id INT, first_name STRING , last_name STRING , email STRING , hire_date DATE ) PARTITIONED BY (department STRING , salary_range STRING ) CLUSTERED BY (id) SORTED BY (id) INTO 4 BUCKETS; This statement creates a new table named employees with five columns: id , first_name , last_name , email , and hire_date . The id column is

What is a .HIVERC file?

  A .hiverc file is a configuration file used by Hive to set command line options and defaults. It is a plain text file that is read by the Hive shell ( hive ) every time it is started. The .hiverc file can contain any valid HiveQL statements, as well as special commands that start with the prefix set . These commands are used to set various configuration options that affect the behavior of Hive. Here are some examples of set commands that can be used in a .hiverc file: set hive.cli.print.header = true ; -- Print column headers in query results set hive.exec.dynamic.partition.mode = nonstrict; -- Allow dynamic partitioning set hive.exec.compress.output = true ; -- Compress query output set hive.vectorized.execution.enabled = true ; -- Enable vectorized query execution You can also use the .hiverc file to define aliases for commonly used commands or to include other files. For example: -- Define an alias for the 'show tables' command create alias showtables as &#