Hive rename table

The general format of using the RENAME table command is as follows: ALTER TABLE table_name RENAME TO new_table_name; How to do it. (Older Hive versions just renamed the table in the metastore without moving  In this recipe, you will learn how to rename a table in Hive. Example: hive> ALTER TABLE test1 ADD COLUMNS(col3 char(10),col4 char(10)); OK Time taken: 0. *As of version 0. . ALTER TABLE hive_table_name RENAME TO new_name;  on the selected connection name or right-click and select Connect from the popup menu. sql. XML · Word · Printable · JSON. The general The JDBC program to rename a table is as follows. Using ALTER command with RENAME, we can rename a table in Hive. Fix Version/s: 3. xxxxx;; FAILED: Execution Error, return code  Use the ALTER TABLE statement to modify the metadata of an existing table or the table properties of an HBase table. jdbc. ALTER TABLE employee CHANGE COLUMN name empName STRING; How to change the position of column in hive. ResultSet; import java. ALTER TABLE employees RENAME TO emp ; — rename the table name. old_table_name RENAME TO [db_name]. I searched for information about and found this: Current Apache hive release doesn't support this feature. e. DriverManager; public class HiveAlterRenameTo { private static String driverName = "org. Using MapR sandbox ; Spark 1. This statement lets you change the name of a table to a different name. ajdj jsdjd jsjsj  8 Nov 2016 Schema Evolution In Hive and Avro. As an example, we will rename our states table to states_old and then view its properties. new_table_name;. example. Rename Table. Hi Team , I have an issue Currently we are sourcing data from Oracle (CDW ) and all the column names are in the upper case , we have to switch over to. These two are required because Looker needs to be able to drop and rename PDTs. The basic idea is to use the EXPORT and IMPORT commands. ALTER TABLE table_name ADD COLUMNS (column1, column2) ; ALTER TABLE table_name RENAME TO table_new_name;. Getting ready The renaming command renames the old table name with a new table name - Selection from Apache Hive Cookbook [Book] Rename an existing table or view. Alter the table properties, such  24 May 2017 We went from having a general subdomain where everything lived (i. In the shared apache Hive Jira HIVE-4847, you can see this is a new feature and the patch is available but it is yet to be merged and tagged to a particular release. In the Default table name field, enter the name of the input table, customer, to be processed by this component. You can also use user-defined load extension  Specifies how to partition table data using PARTITION BY. Suppose we have created partitions for a table, but we need to rename a particular partition or drop a partition that got incorrectly created. allow-drop-table , hive. As of version 0. SQLException; import java. See Using Partition Columns for a description of the  15 Jun 2017 Rename Database in Hive. hadoop. Resolution: Fixed. So one suggestion / workaround I've received thus far is to write the files into a _tmp directory, delete the original , and then rename the _tmp to the original  you are adding additional column with not null constraint to hive table which has some rows, that means this new column should be created with null values for existing rows. metastore-cache-ttl = 0s. Alter the table statements to rename the table in hive. Double-click the other tELTHiveInput component using the  Background: I've created a hive external table with data stored in parquet format. 2. Statement; import java. ------ ----- ---- ----. 213. on the selected connection name or right-click and select Connect from the popup menu. This is required because Presto caches the Hive metastore results, and Looker needs to be able to see the tables right away. metastore. The following query is used to rename a partition: hive > ALTER TABLE student PARTITION (Class='6') > RENAME TO PARTITION (Section='b');  Hive Alter Table. 2 I attempt to read the. ALTER (TABLE|VIEW) table_name SET TBLPROPERTIES (key1=val1, key2=val2, ) Set the properties of an existing table or  hive> ALTER TABLE events RENAME TO 3koobecaf;; hive> ALTER TABLE pokes ADD COLUMNS (new_col INT);; hive> ALTER TABLE invites ADD COLUMNS (new_col2 INT COMMENT 'a comment');; hive> ALTER TABLE invites REPLACE COLUMNS (foo INT, bar STRING, baz INT COMMENT 'baz  Aug 2, 2016 SupportKB. ALTER (TABLE|VIEW) table_name SET TBLPROPERTIES (key1=val1, key2=val2, ) Set the properties of an existing table or  Renaming tables In this recipe, you will learn how to rename a table in Hive. Champion csguna. Log In. For the DB rename to work properly, we need to update three tables in the HMS DB. 31:7222/tmp/ hive-root/hive_2012-07-25_17-17-10_080_8302669910304016669/_tmp. hive> EXPORT TABLE tableName TO 'TEMP_LOCATION'. If the destination table name already exists, an exception will be thrown. Target Version: 3. Error Details: hive> ALTER TABLE testalterdb. Note. 6, a rename on a managed table moves its HDFS location as well. Double-click the other tELTHiveInput component using the  hive -e "use $database;create table sz_grp_4_data as select week,store,item_id, value,lvl1,lvl2,lvl3,lvl4,lvl5,lvl6,lvl7,lvl8,region,store_sz,store_acv from HiveException: Unable to rename output to: maprfs://10. Connection; import java. Click the button as many times as required to add columns and rename them to replicate the schema of the customer table we created earlier in Hive. See SQL Analytics. default. Copy to clipboard Copy. Similarly, alter table partition statements allow you change the properties of a specific partition in the  I have the corresponding meaningful names with me in a sheet(Can load it in a table as well). Export. allow-rename-table=true; hive. If ``property_name already exists, its value is reset to property_value . (Older Hive versions just  Renaming tables In this recipe, you will learn how to rename a table in Hive. ALTER TABLE employee CHANGE COLUMN empName name STRING AFTER countryName;. HiveDriver"; public static void   Rename an existing table or view. 0. [sentry] Rename Sentry Table section to Hive Tables. allow-rename-table , hive. The tables and views appear in the Hadoop Data panel where you can explore, query, rename, or delete any of the objects. Rename has been changed as of version 2. alter1 RENAME TO xxx. For Hive tables, this statement alters only the metadata in the catalog; this statement does not result in changes to the actual data. ALTER TABLE  This post represents hive alter statements, Alter table statements enable you to change the structure of an existing table. SQLException ; import java. 0  11 Oct 2017 Alter table statements enable you to change the structure of an existing table. default; presto:default> alter table t rename to t2; RENAME TABLE presto:default> select * from t2; Query 20160229_132727_00038_hieyj failed: line 1:15: Table hive. mysql -u root -p; use hive;; select * from DBS where name = "rav";  14 May 2016 Hue · HUE-3895. Posts: 603. ALTER TABLE employees ADD COLUMNS (…) — Adding columns 24 Jan 2015 This statement lets you change the name of a table to a different name. 21 Sep 2016 After designing the table columns and datatypes, we may need to modify it again to handle new request. But constraints stopping it being null. Details. apache. Type: Bug. This operation does not support moving tables across databases. Use this  You can rename a table using ALTER TABLE RENAME command. External Table Managed Table: Hive Owns the data and control the lifecycle of the data. 11. First of all, there is no rename functionality for database like table in Hive. Radoop first tests the connection, and after a successful test, retrieves the metadata (object list) from Hive. Similar to other database systems and SQL-inspired Big Data processing systems such as Hive, U-SQL uses the concept of a table to provide a data container that contains schematized structured data. Let's try to change the name of an existing table using the ALTER command – ALTER TABLE [db_name]. allow-drop-column and hive. Message 1 of 3 (148 Views). But I get error, you can not rename a partitoned table. 56 seconds hive> hive>  Using ALTER Table command, the structure and metadata of the table can be modified even after the table has been created. (Older Hive versions just renamed the table  20 Sep 2017 The concept of partitioning in Hive can make a huge difference in the execution time of large datasets. Why can't we rename a partitioned table ? Thanks. import java. Managed tables are not supported, so setting 'EXTERNAL'='FALSE' has no  3 Mar 2016 still does not work due to HIVE-4847 is not fixed yet. Renaming a Table Use this statement to rename the table log_messages to logmsgs: ALTER TABLE log_messages RENAME TO logmsgs; Adding, Modifying, and  The CREATE EXTERNAL TABLE AS COPY statement creates a query definition for a table external to your Vertica database. We can use the  19 Feb 2015 The hivevar prefix works for custom defined variables and may be also initiated by defining --hivevar cli switch (see here https://cwiki. I am trying to rename a partitoned table. read-only, Operations that read data or metadata, such as SELECT  SET TBLPROPERTIES ('property_name' = 'property_value' [ , ]) Specifies the metadata properties to add as 'property_name' and the value for each as 'property value`''. 0 Kudos. How can I replace the meaningless column names with the names that I have with me in a sheet/table? I'm using tableau 10. Labels: None. The ALTER command will only modify Hive metadata, NOT the data. Tables provide additional optimizations beyond a schematized view over unstructured files. (The RENAME TO clause is the one exception; it can cause HDFS files to be moved to different  Hi,. abc nsn nss jjjjj. org/confluence/ display/Hive/LanguageManual+Cli). sentry. 10. Here are the commands to manipulate Hive table columns:  Updated: April 26, 2017. , cdhhive. (Older Hive versions just renamed the table in the metastore without moving the HDFS location. 56 seconds hive> hive>  Hi @Sidi Mahmoud RHIL,. allow-drop-table=true. Users should make sure the actual data conforms with the metadata definition manually. (Older Hive versions just renamed the table in the metastore without moving  In Impala, this is primarily a logical operation that updates the table metadata in the metastore database that Impala shares with Hive. Similarly, alter table partition statements allow you change the properties of a specific partition in the named table. Nov 8, 2016 Schema Evolution In Hive and Avro. This is usually a straight forward process and Cloudera provides good documentation to walk you through renaming hosts. This statement is a combination of the CREATE TABLE and COPY statements, supporting a subset of each statement's parameters, noted below. hive. 2; Hive 1. Also you will be asked for moving a table or renaming a table in  10 Aug 2017 How to Rename a Partition? Syntax: ALTER TABLE table_name PARTITION partition_spec RENAME TO PARTITION partition_spec;. If you partition data, Vertica creates a Hive-style partition directory structure. false. E. You can add columns/partitions, change SerDe and SerDe properties, or rename the table itself. Fact table: Time 123 456 789. We can  29 Feb 2016 presto> use hive. max-partitions-per-writers, Maximum  legacy (default value), Few authorization checks are enforced, thus allowing most operations. (The RENAME TO clause is the one exception; it can cause HDFS files to be moved to different  The JDBC program to rename a table is as follows. Maintaining specific order of columns and proper naming reduces bugs during development and improves the ability to browse the data. t2 does not exist select * from t2 presto:default> select * from t2; t --- (0 rows) Query  hive. Most ALTER TABLE operations do not actually rewrite, move, and so on the actual data files. hive. You can see that a number of operations can be allowed as a simple requirement change: Adding a new column to a table (the “country” column in the 2nd file); Dropping a column from a table (the “id” column in the 3nd file); Renaming a column (the “birthday” column in  28 Jun 2016 This tutorial uses examples to describe how to move Hive table from one cluster to another. hive> ALTER TABLE cte_employee RENAME TO c_employee;. respect-table-format, Should new partitions be written using the existing table format or the default Presto format? true. Internal Table or Managed Table 2. allow-add-column , hive. hadoop. 057 seconds hive> ALTER TABLE states RENAME TO  3 May 2017 You can alter table to modify attributes of Hive table. Here we provide instructions on Alter partitions. net). The. warehouse. 6, a rename on a managed table moves its HDFS location. Champion. ALTER TABLE table_name RENAME TO new_table_name;. As I am using MySQL, I will use MySQL query example here, change accordingly based on your DB type: DBS table, this table holds the information about Databases in  Use the ALTER TABLE statement to modify the metadata of an existing table or the table properties of an HBase table. We first export the original table to a location by EXPORT statement. Within partitions you can sort by using ORDER BY. The following example illustrates a quick workaround for Hive shortcoming when renaming table that has a  Jul 25, 2016 hive. hive> CREATE EXTERNAL TABLE states (state STRING) LOCATION '/user/demo/states'; OK Time taken: 1. 27 Dec 2013 Changing column name of a hive table (using parquet format) will cause null result returned for that column. Choose which one works for you :) Once your authorization plan is set, you can create new databases and should move old working tables into new locations. immutable-partitions, Can new data be inserted into existing partitions? false. csguna. Labels: Hive · Reply. For join-only jobs, apply Hive SQL expressions in new or existing target columns. For HBase tables, this statement alters metadata, and the HBase table  Can we create multiple tables in Hive for a data file? How does CONCAT function work in Hive? How will you change settings of a Hive session? How will you rename a table in Hive without using ALTER command? What is the difference between SORT BY and ORDER BY in Hive? What is the use of strict mode in Hive? Dropping Tables The familiar DROP TABLE command from SQL is supported: DROP TABLE IF EXISTS employees; The IF EXISTS keywords are optional. )  13 Mar 2016 Based on the Hive doc below: Rename Table *ALTER TABLE table_name RENAME TO new_table_name;* This statement lets you change the name of a table to a different name. As of version 0. Priority: Major. 1) original table schema: sample_table (c1 int, c2 int) 2) alter c1 to cc1: alter sample_table change c1 cc1 int; 3) new table schema: sample_table (cc1 int, c2 int) Now cc1 column contains all null  4 Feb 2017 We can use IMPORT/EXPORT statements to rename a table in Hive. net) to having cluster subdomains named by cluster (i. 0 (HIVE-14909) so that a managed table's HDFS location is moved only if the table is created without a LOCATION clause and under its database directory. Component/s: app. You can see that a number of operations can be allowed as a simple requirement change: Adding a new column to a table (the “country” column in the 2nd file); Dropping a column from a table (the “id” column in the 3nd file); Renaming a column (the “birthday” column in  Click the button as many times as required to add columns and rename them to replicate the schema of the customer table we created earlier in Hive. Getting ready The renaming command renames the old table name with a new table name. DriverManager; public class HiveAlterRenameTo { private static String driverName = "org. Alter Table Command in Hive  Feb 19, 2015 The hivevar prefix works for custom defined variables and may be also initiated by defining --hivevar cli switch (see here https://cwiki. The config properties hive. Example: hive> ALTER TABLE test1 ADD COLUMNS(col3 char(10),col4 char(10)); OK Time taken: 0. rename database rav to rav_dw. 5. 0 (HIVE-14909) so that a managed table's HDFS location is moved only if the table is created without a LOCATION clause and under its database directory. allow-rename-table, Allow the Hive connector to rename tables. How to add multiple columns in hive. 1 Feb 2016 In this post, i will try to move a table between HIVE databases in two ways. allow-rename-column are used. Report Inappropriate Content. g. dir, The ALTER statement will fail with following error. Shell. For HBase tables, this statement alters metadata, and the HBase table  May 3, 2017 You can alter table to modify attributes of Hive table. Summary: If a Hive table or database is created with "location" pointing to path that is not in default hive. hive> IMPORT TABLE newTableName FROM  15 Dec 2013 There are two type of tables in Hive 1. This clause may contain column references but not expressions. Registered:  12 Mar 2016 (4 replies) Based on the Hive doc below: Rename Table *ALTER TABLE table_name RENAME TO new_table_name;* This statement lets you change the name of a table to a different name. The following example illustrates a quick workaround for Hive shortcoming when renaming table that has a  17 Apr 2017 How to rename a column in hive. 132. org/confluence/display/Hive/LanguageManual+Cli). Then we create new table with IMPORT statement. Status: Resolved. You can add columns/partitions, change SerDe, add table and SerDe properties, or rename the table itself. HiveDriver"; public static void  In Impala, this is primarily a logical operation that updates the table metadata in the metastore database that Impala shares with Hive. either you can add default value along with alter statement or remove the not null constraint  The Query or Join Data in Hadoop directive enables you to create jobs that combine multiple joins and queries, and then customize the target table to remove unwanted rows For join-only jobs, select, arrange, and rename target columns. Affects Version/s: 3. Getting readyThe renaming command renames the old table name with a new table name. 0 on Hive. Solutions. Jun 28, 2016 This tutorial uses examples to describe how to move Hive table from one cluster to another