alter database location in hive

Sort Columns: [] Rename a Table. If a LOCAL keyword is specified, then the LOAD command will look for the file path in the local filesystem. Open Back to List of Topics. Change ). OutputFormat: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat Below text to show jsam is available in hdfs : Found 1 items In the older version of the hive, the hive database’s default storage location is Hive stores data at the HDFS location /user/hive/warehouse folder if not specified a folder using the LOCATION clause while creating a table. ALTER TABLE [old_db_name. By default, the location for default and custom databases is defined within the value of hive.metastore.warehouse.dir, which is /apps/hive/warehouse. But the later version moves its HDFS location if you rename on a managed table. The ALTER DATABASE... SET LOCATION statement does not move the contents of the database's current directory to the newly specified location. Note: Oracle Enterprise Manager 9.2 was used in the examples. ‎05-06-2016 It only helps in preventing users from accidentally doing operations they are not supposed to do. 10:06 AM, can you post the full dfs location from the output of the below command, Created In Impala 2.6 and higher, Impala automatically handles creating or removing the associated folders when you issue ALTER TABLE statements with the ADD PARTITION or DROP PARTITION clauses. Bucket Columns: [] The syntax for Hive alter database statement is as follows: ALTER (DATABASE|SCHEMA) database_name SET DBPROPERTIES (property_name=property_value,...); 07:52 PM. Its now running using below , thanks for all your help : hive> ALTER TABLE jsont1 SET LOCATION "hdfs:/jsam/j1"; hdfs:/ : Did you know then why its not running using hdfs:// (double slash), alter table jsont1 set location "hdfs://jsam/j2", Created Export How to change location of the external table in hive . Change location in the table properties using the following query ALTER TABLE table_name SET LOCATION "location_in_hdfs" (e.g "hdfs://bighdpope/data/raw/cag/Output") 2.) Alter table statement helps to change the structure of the table in Hive. ]new_table_name; Example: ALTER TABLE tbOutput RENAME TO tbResults. ‎05-06-2016 The command to use the database is USE Copy the input data to HDFS from local by using the copy From Local command. Hence use ‘Cascade’ to drop the database even it has tables. CREATE EXTERNAL TABLE TestTable(test_id INT, col2 INT, col3 STRING)ROW FORMAT DELIMITEDFIELDS TERMINATED BY ‘,’LOCATION ‘/user/hive/warehouse/datadirectory’; Database Properties:ALTER (DATABASE|SCHEMA) database_name SET DBPROPERTIES (property_name=property_value, …); This helps in modifying the database properties which user has provided at the time of database creation. ‎05-06-2016 Database: logs json string We can. ALTER DATABASE ALTER TABLE; ALTER VIEW CREATE DATABASE ... ALTER TABLE SET command is used for setting the SERDE or SERDE properties in Hive tables. Using EM to Change the Database Archiving Mode. SerDe Library: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe This chapter explains how to create Hive database. Change ), You are commenting using your Twitter account. 07:47 PM When data is placed outside the Hive or HDFS location, creating an external table helps as the other tools that may be using the table, places no lock on these files. The default database location was changed. {0} is not absolute or has no scheme information. Assign any new (key, value) pairs into DBPROPERTIES; Set owner user or role to the Database; But below are its limitations. drwxr-xr-x - hadoop supergroup 0 2016-05-06 12:49 /jsam/j1, Created ALTER TABLE jsont1 SET LOCATION "hdfs://mycluster:8020/jsam/j1"; Created on Below is a complete information about the same. The location for external hive database is “/warehouse/tablespace/external/hive/” and the location for manage database is “/warehouse/tablespace/managed/hive”. ( Log Out /  Status of Hive Authorization before Hive 0.13. No other metadata about the database can be changed, including its name and directory location: hive> ALTER DATABASE financials SET DBPROPERTIES ('edited-by' = 'Joe Dba'); There is no way to delete or “unset” a DBPROPERTY. Creating a table in HIve with different type of data types. Location: hdfs://mycluster:8020/jsam 09:58 AM, Yes I tried this also .. getting as below, FAILED: IllegalArgumentException java.net.UnknownHostException: jsam. Select START > … ALTER DATABASE TestDB SET OWNER USER cloudera; Database Location: ALTER (DATABASE|SCHEMA) database_name SET LOCATION hdfs_path; Though it is documented that the database location can be changed, however it is not allowing to do so in Hive 1.1.0 in CDH 5.10.0 Database Name: ALTER DATABASE test_db RENAME TO test_db_new; Though this is also documented but renaming a database is not allowed in Hive … LastAccessTime: UNKNOWN Note: As per the link here, there is no functionality to rename the existing database however there is a workaround to rename the database if you have necessary privileges on Hive metastore without changing the database location. Hive>LOAD DATA INPATH '/user/guru99hive/data.txt' INTO table guruhive_internaltable; 3. If we want to change the name of an existing table, we can rename that table by using the following signature: - ‎05-08-2020 (Note that it looks like `hdfs:` followed by 3x `/`s), Find answers, ask questions, and share your expertise. # col_name data_type comment In Hive, we can perform modifications in the existing table like changing the table name, column name, comments, and table properties. Owner: hadoop json string serialization.format 1, Created Please specify a complete absolute uri with scheme information. Created ALTER TABLE name CHANGE column_name new_name new_type; ALTER TABLE test CHANGE col2 col4 string; ALTER TABLE name REPLACE COLUMNS (col_spec[, col_spec …]); ALTER TABLE test REPLACE COLUMNS (id int, col2 int, col3 string), ALTER TABLE [DATABASE] SET LOCATION [NewLocation]. ALTER DATABASE ARCHIVELOG; 6. CREATE DATABASE with dbProperties in Hive, Difference between CopyFromLocal, Put, CopyToLocal and Get – Big Data and SQL. We can associate key-value pairs with a database in the DBPROPERTIES using ALTER DATABASE command. SPARK-29260 Enable supported Hive metastore versions once it support altering database location. Specifies the partition with parameters partition_spec whose location you want to change. OK Hence use ‘Cascade’ to drop the database even it has tables.DROP DATABASE TestDB CASCADE;To drop the database if exists and even it contains tablesDROP DATABASE IF EXISTS TestDB CASCADE;To avoid dropping the database which has tables.DROP DATABASE IF EXISTS TestDB RESTRICT; Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. An external table can be created when data is not present in any existing table (i.e., using the SELECT clause). numFiles 0 transient_lastDdlTime 1462269267 Using this you can alter different column related properties. It allows us to rename the table,add columns/partitions,rename columns/partitions and so on in Hive table.Hive versions prior to 0.6 just renamed the table in the metastore without moving the HDFS location. Amazon S3 considerations: You can specify an s3a:// prefix on the LOCATION attribute of a table or partition to make Impala query data from the Amazon S3 filesystem. ‎05-06-2016 REPLACE is used when you want to have an altogether different columns to your table. SET LOCATION 'new location' Specifies the new location, which must be an Amazon S3 location. It has a table "name". All these commands and their options are from hive-0.14.0 release documentations. ALTER DATABASE AdventureWorks2014 MODIFY FILE (NAME = AdventureWorks2014_Log, FILENAME = 'E:\New_location\AdventureWorks2014_Log.ldf'); GO. Below is a query I … In this post, we will discuss about Hive Database Commands (Create/Alter/Use/Drop Database) with some examples for each statement. Here are the illustrated steps to change a custom database location, for instance "dummy.db", along with the contents of the database. HIVE ALTER Database Syntax. ALTER SCHEMA was added in Hive 0.14 (HIVE-6601). ) ‎05-06-2016 The partition_spec specifies a column name/value combination in the form partition_col_name = partition_col_value. Alter Database in Hive You can set key-value pairs in the DBPROPERTIES associated with a database using the ALTER DATABASE command. /jsam/j2, Created Example: ALTER TABLE test REPLACE COLUMNS (id int, col2 int, col3 string), Change Table’s Location:ALTER TABLE [DATABASE] SET LOCATION [NewLocation]. ( Log Out /  ALTER Statement on HIVE Column. Changing location requires 2 steps: 1.) COLUMN_STATS_ACCURATE false This article is to cover all the DDL commands in Hive. So, in order to use these commands with all the options described below we need at least hive-0.14.0 release. Change ), You are commenting using your Google account. Hive - Alter Table. To change the archiving mode from NOARCHIVELOG to ARCHIVELOG using Enterprise Manager, follow the steps below. Num Buckets: -1 Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Hadoop Hive alter database is a statement used to change the properties of a databases in Hive. How to change location of the external table in hi... [ANNOUNCE] New Cloudera ODBC 2.6.12 Driver for Apache Impala Released, [ANNOUNCE] New Cloudera JDBC 2.6.20 Driver for Apache Impala Released, Transition to private repositories for CDH, HDP and HDF, [ANNOUNCE] New Applied ML Research from Cloudera Fast Forward: Few-Shot Text Classification, [ANNOUNCE] New JDBC 2.6.13 Driver for Apache Hive Released. You can add or remove the database comments, properties etc by using alter database statements. 09:20 AM. # Storage Information I have a database named "test". To do it correctly, you need to keep the `hdfs://` part and relative path that starts with a `/`. If you are working with a more standard Hive setup and only need to change the table locations in the current database instance, you can simplify things with the ALTER TABLE statement. ‎05-08-2020 11:48 AM. Alter Databases. Alter location of a Hive table Posted on April 17, 2018 Long story short: the location of a hive managed table is just metadata, if you update it hive will not find its data anymore. The New_location is a folder created on a separate drive (in this specific case, we will change from a default C to E drive on a local machine) with sufficient disk space for SQL database files. Hive is a database technology that can define databases and tables to analyze structured data. Change Column TypeALTER TABLE name CHANGE column_name new_name new_type; Example: ALTER TABLE test CHANGE col2 col2 int; Change Column Type and NameALTER TABLE name CHANGE column_name new_name new_type; Example: ALTER TABLE test CHANGE col2 col4 string; Replace Columns in the Table:ALTER TABLE name REPLACE COLUMNS (col_spec[, col_spec …]); The above command used to remove all existing columns and adds the new set of columns. Display the content of the table Hive>select * from guruhive_internaltable; 4. hive> ALTER TABLE jsont1 SET LOCATION "hdfs:/jsam/j1"; OK Time taken: 0.245 seconds. Log In. The default authorization in Hive is not designed with the intent to protect against malicious users accessing data they should not be accessing. You can set key-value pairs in the DBPROPERTIES associated with a database using the ALTER DATABASE command. 1. CREATE TABLE Emp(EmpID INT, Ename string, ESal float, DeptNo INT)ROW FORMAT DELIMITEDFIELDS TERMINATED BY ‘,’; Or we can simply create table without delimitation specification. Protect Mode: None Syntax for changing Database Properties: ALTER (DATABASE|SCHEMA) database_name SET DBPROPERTIES (property_name=property_value,...); The theme for structured data analysis is to store the data in a tabular manner, and pass queries to analyze it. EXTERNAL TRUE 1) CREATE EXTERNAL TABLE IF NOT EXISTS jsont1( Example:ALTER DATABASE TestDB SET OWNER USER cloudera; Database Location:ALTER (DATABASE|SCHEMA) database_name SET LOCATION hdfs_path; Though it is documented that the database location can be changed, however it is not allowing to do so in Hive 1.1.0 in CDH 5.10.0, Though this is also documented but renaming a database is not allowed in Hive 1.1.0 in CDH 5.10.0. ALTER DATABASE in Hive The ALTER DATABASE statement in Hive is used to change the metadata associated with the database in Hive. Retention: 0 hdfs:/ : Did you know then why its not running using hdfs:// (double slash) Open the database: ALTER DATABASE OPEN; 7. ALTER TABLE dbtest SET LOCATION “hdfs:/DB/dbTest”; By default, the mode is RESTRICT which blocks the deletion of database if it holds tables. It provides SQL like commands to alter the table. rawDataSize -1 ]old_table_name RENAME TO [new_db_name. ; If the LOCAL keyword is not specified, then the Hive will need the absolute URI of the file. If a particular property was already set, this overrides the old value with the new one. Adding Columns of an Existing Table:ALTER TABLE name ADD COLUMNS (col_spec[, col_spec …]); Example: ALTER TABLE test ADD COLUMNS (Col2 string, Col3 int). Hive; HIVE-8472; Add ALTER DATABASE SET LOCATION. Table Type: EXTERNAL_TABLE alter hive column ALTER TABLE tbl_nm CHANGE [COLUMN] col_old_nm col_new_nm col_type [COMMENT col_comment] [FIRST|AFTER col_nm] [CASCADE|RESTRICT]; CreateTime: Tue May 03 15:24:27 IST 2016 It does not change the locations associated with any tables/partitions under the specified database. Hive contains a default database named You do need to physically move the data on hdfs yourself. Can I change the datatype in Hive database? 11:32 AM, hive> describe formatted jsont1; ( Log Out /  The specified property values override any existing value with the same property name. The following queries rename the column name and column data type using the above data: The database creates in a default location of the Hive warehouse. Hive Describe - Learn Hive in simple and easy steps from basic to advanced concepts with clear examples including Introduction, Architecture, Installation, Data Types, Create Database, Use Database, Alter Database, Drop Database, Tables, Create Table, Alter Table, Load Data to Table, Insert Table, Drop Table, Views, Indexes, Partitioning, Show, Describe, Built-In Operators, Built-In Functions CREATE DATABASE TestDBWITH dbProperties(‘Creator: ‘= ‘Username’, ‘Created-Date:’ = ‘01-01-2020’); Or we can just create the database without any properties. Syntax--Set SERDE Propeties ALTER TABLE table_name [PARTITION part_spec] SET SERDEPROPERTIES (key1 = val1, key2 = val2,...) ALTER TABLE table_name … No other metadata about the database can be changed, including its name and directory location: ALTER (DATABASE|SCHEMA) DATABASE_NAME Enter your email address to subscribe to this blog and receive notifications of new posts by email. Compressed: No 11:36 AM. totalSize 0 Storage Desc Params: To drop the internal table Hive>DROP TABLE guruhive_internaltable; If you dropped the guruhive_internaltable, including its metadata and its data will be deleted from Hive. InputFormat: org.apache.hadoop.mapred.TextInputFormat Example: ALTER DATABASE TestDB SET dbProperties(‘Edited-by ‘= ‘UserName’, ‘Created-On’=’2020-08-01’); Database Access:ALTER (DATABASE|SCHEMA) database_name SET OWNER [USER|ROLE] user_or_role; This command helps in modifying the access level to a different user or a role. I tried this command - ALTER TABLE jsont1 SET LOCATION "/jsam/j2" ; FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. Below you will find that each syntax contains [CASCADE|RESTRICT] which i will be explaining at the end. The following table contains the fields of employeetable and it shows the fields to be changed (in bold). Copy the file from old_location to new_location using the … - edited In Cloudera, Hive database store in a /user/hive/warehouse. col_name data_type comment We can alter the databases with Alter command in hive but it provides very minimal alterations. LOCATION ‘/user/hive/warehouse/datadirectory’; ALTER DATABASE TestDB SET dbProperties(‘Edited-by ‘= ‘UserName’, ‘Created-On’=’2020-08-01’); ALTER (DATABASE|SCHEMA) database_name SET OWNER [USER|ROLE] user_or_role; ALTER DATABASE TestDB SET OWNER USER cloudera; ALTER (DATABASE|SCHEMA) database_name SET LOCATION hdfs_path; ALTER DATABASE test_db RENAME TO test_db_new; ALTER TABLE name ADD COLUMNS (col_spec[, col_spec …]); ALTER TABLE test ADD COLUMNS (Col2 string, Col3 int). Re: How to change location of the external table in hive . The LOAD statement in Hive is used to move data files into the locations corresponding to Hive tables.. Example: ALTER TABLE dbtest SET LOCATION “hdfs:/DB/dbTest”; DROP DATABASE TestDB; By default, the mode is RESTRICT which blocks the deletion of database if it holds tables. ( Log Out /  Verify your changes: ARCHIVE LOG LIST . WITH dbProperties(‘Creator: ‘= ‘Username’, ‘Created-Date:’ = ‘01-01-2020’); CREATE TABLE Emp(EmpID INT, Ename string, ESal float, DeptNo INT). LOCATION '/jsam'; Now I need to change the location from where above json1 points to. alter database Alters metadata associated with a database by setting DBPROPERTIES . # Detailed Table Information Change ), You are commenting using your Facebook account. numRows -1 ‎05-06-2016 hive> ALTER DATABSE financial SET DBPROPERTIES (‘edited by’ = ‘kmak’); HIVE CREATE Table Syntax. Table Parameters: It is ok to omit the nameservice/namenode part (to use the defaultFs). We can’t unset any property using Alter command

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