show partitions hive

partition Partition command. To avoid repeating the above command, you can use the following command: MSCK REPAIR TABLE table_name; The statement adds the partitions that exist on HDFs but not on the meta-store to the meta-store, as shown in the following example: Hive> dfs-mkdir/user/hive/warehouse/learning.db/people/department=1/sex=0/howold=23;

Describe:Hive Table Pms.cross_sale_path is established with the date as the partition, the HDFs directory/user/pms/workspace/ouyangyewei/testusertrack/job1output/ The data on the Crosssale, written on the $yesterday partition of the tableTable structure:HIVE-E "Set Mapred.job.queue.name=pms;drop table if exists pms.cross_sale_path;create external table Pms.cross_sale_ Path (track_id string,track_time string,session_id string,gu_id string,end_user_id string,page_category_id bigint, algorithm_id i

There are no complex partition types (range partitions, list partitions, hash partitions, and hybrid partitions) to create partition tables in hive ). Partition columns are not an actual field in the table, but one or more pseudo columns. This means that the partition column

Create/drop/grant/revoke Roles and PrivilegesHive Default authorization-legacy Mode has information about these DDL statements: CREATE ROLE GRANT ROLE REVOKE ROLE GRANT Privilege_type REVOKE Privilege_type DROP ROLE SHOW ROLE GRANT SHOW GRANT For SQL standard based authorization in Hive 0.13.0 and later releases, see thes

then add the data to the corresponding partition.To view partitions:[Java]View PlainCopy Show partitions employees; Attached: Employees here represents the table name.Delete the unwanted partitions[Java]View PlainCopy ALTER TABLE Employees drop if exists partition (date_time=' 2015-01_24 ', type

/partition_test/stat_date=20110728/province= Zhejiang Each partition will have a separate folder, and the following are all the data files for that partition. In this example stat_date is the main level, province is the sub-level, all stat_date= ' 20110728 ', and province different partitions will be in/user/hive/warehouse/partition_test/ stat_date=20110728 below, and stat_date different

/warehouse/partition_test/stat_date=20110728/province= Zhejiang Each partition will have a separate folder, and the following are all the data files for that partition. In this example stat_date is the main level, province is the sub-level, all stat_date= ' 20110728 ', and province different partitions will be in/user/hive/warehouse/partition_test/ stat_date=20110728 below, and stat_date different

table has only one process, loading the data and creating the table at the same time (create External table ...). Location), the actual data is stored in the HDFS path specified behind the location and is not moved to the Data Warehouse directory. When you delete a External table, only the metadata is deleted, and the data in the table is not actually deleted. Second, basic Operation commandSimple creation of tablesCREATE TABLE table_name ( ID int, dtdontquery string

;private static ResultSet resultset;static {try {class.forname (drivername);} catch ( ClassNotFoundException e) {System.out.println (e); System.exit (1);} try {connection = drivermanager.getconnection ("Jdbc:hive://192.168.0.1:50000/default", "Hive", "Hadoop"); First to open the Hiveserver service: Hive--sErvice hiveserverstatement = Connection.createstatement ();} catch (Exception e) {e.printstacktrace ();

partitions and buckets in the hive Hive the table into a "Partition" Partition. This is a mechanism for rough partitioning of tables based on the value of the partition column (Partition column, such as date), which speeds up the query speed of data fragmentation (Slice) using partitions Tables and

Author:kwu"Resolve" hive dynamic add partitions can not exceed 100 problem, full dynamic generation partitions more than 100 will occur such as the following exception:The maximum number of dynamic partitions is controlled by hive.exec.max.dynamic.partitions and Hive.exec.max.dynamic.part Itions.pernode. Maximum was se

Author:kwu"Solve" hive dynamic increase partitions can not exceed 100 of the problem, the full dynamic generation partitions more than 100 will appear the following exception:The maximum number of dynamic partitions is controlled by hive.exec.max.dynamic.partitions and Hive.exec.max.dynamic.part Itions.pernode. Maximum

partitionOf course, you also need to provide a method to delete the part_dt = '000000' partition:Alter table my_daily_report drop partition (par_dt = '000000 ')Drop partition deletes all partitions and data. drop partition_spec only deletes partition metadata and does not delete data.Note: There is no delete from statement in HIVE. If you only delete all statements in a partition, you can u

The advantage of having the CREATE table and create external table,external table in hive is that the table structure and data are unbound, and deleting the table does not delete the data, the table is equivalent to defining the specification to parse the corresponding file.A more common scenario is to create a façade of the site's users ' browsing data, and then do the partitioning by day to speed up the search efficiency.Create a tableCreate Table s

Win7 system disk partitions do not show capacity how to set? PS: Before modifying, please make sure your disk display mode is tiled, only tile can show oh. Workaround: First step, copy the following and paste it into a text file Windows Registry Editor Version 5.00 [Hkey_classes_rootdrive] "Tileinfo" = "prop:*system.percentfull"; System.Computer.De

On the hive user maillist today, someone asked the show current roles command question:iamtryingtorun ' Showcurrent Roles ' onApachehive0.13.1butgettingfollowingerror,hive> SHOWCURRENTROLES; errorinroleoperationshow_current_roleonrolenamenull, errormessageunkownroleoperationshow_current_rolefailed:execution Error,returncode1fromorg.apache.hadoop.hive.ql.exec.ddlt