Hive drop partition range

Differential pressure switch

Apr 13, 2016 · It will not work if you use the same value displayed above to drop it, even if Hive says OK. hive> alter table… Hadoop Notes My notes on Hadoop, Cloud, and other BigData technologies See full list on tutorialspoint.com New partitions must be of the same type (LIST, RANGE or HASH) as existing partitions.The new partition rules must reference the same column specified in the partitioning rules that define the existing partition(s). We know that Hive will create a partition with value “__HIVE_DEFAULT_PARTITION__” when running in dynamic partition mode and the value for the partition key is “null” value. However, depending on on the partition column type, you might not be able to drop those partitions due to restrictions in the Hive code. x - for partition location alter table drop partition x x alter table (all of them except the ones above) x x truncate table x x create view x x alter view properties x x alter view rename x x drop view properties x x drop view x x analyze table: x x show databases: x x show columns: x x show table status: x x show table properties: x x create ... Nov 14, 2018 · I run this to drop the table: ALTER TABLE table_name drop col_name; but I am getting ... expecting PARTITION near 'drop' in drop partition statement 30475/hadoop-hive-how-to-drop-a-table Toggle navigation To drop a partition from a Hive table, this works: ALTER TABLE foo DROP PARTITION(ds = 'date')...but it should also work to drop all partitions prior to date. ALTER TABLE foo DROP PARTITION(ds < 'date') This task is to implement ALTER TABLE DROP PARTITION for all of the comparators, < > <= >= <> = != instead of just for =. You can drop the partitions using the following command: ALTER TABLE table_name DROP [IF EXISTS] PARTITION partition_spec [, PARTITION partition_spec,...] [IGNORE PROTECTION] [PURGE]; If trash is configured, then data will be moved to the.Trash/Current directory. Example 4-45 Converting to a Hybrid Range-Partitioned Table. CREATE TABLE internal_to_hypt_table ( prod_id NUMBER NOT NULL, cust_id NUMBER NOT NULL, time_id DATE NOT NULL, channel_id NUMBER NOT NULL, promo_id NUMBER NOT NULL, quantity_sold NUMBER(10,2) NOT NULL, amount_sold NUMBER(10,2) NOT NULL ) PARTITION by range (time_id) (PARTITION sales_2014 VALUES LESS THAN (TO_DATE('01-01-2015','dd-mm ... May 03, 2017 · In this case, the left-most partition is an empty partition, and NULL values are placed in the following partition. So basically NULLs are going to end up in the left most partition(#1) unless you specifically make a partition for NULL and are using a RIGHT partition. Mar 06, 2018 · 2.Creating input file for dynamic partitioning: 3.Loading input file into user1 table: The above dataset needs to be copied into table user1. 4.Setting of parameters for dynamic partitioning: To use the dynamic partitioning in hive we need to set the below parameters in hive shell or in hive-site.xml file. Aug 30, 2016 · A range of the partition column forms a partition which is stored in its own sub directory within the data directory of the table. Hive supports the use of one or multiple partition columns. There are two partitioning approaches that are supported in Hive. These are dynamic partitioning and static partitioning. Nov 01, 2019 · User may create a Hive partition table named "hao3" and does a dynamic partition insert into this Hive partition table from a table named "t3" with some Chinese words inside the partition key. hive> desc t3; OK name string partition_col string age int hive> select * from t3; OK abc 小明 20 def part2 15 ghi part3 36 ijk part4 50 hive> CREATE ... The results from a query of a Hive table that contains a NULL value in a STRING type partitioning column are different than from a query of a Big SQL table with a NULL value in a STRING type partitioning column. May 03, 2017 · In this case, the left-most partition is an empty partition, and NULL values are placed in the following partition. So basically NULLs are going to end up in the left most partition(#1) unless you specifically make a partition for NULL and are using a RIGHT partition. hive> alter table t drop if exists partition (p=1),partition (p=2),partition(p=3); Dropped the partition p=1 Dropped the partition p=2 Dropped the partition p=3 OK EDIT 1: Also, you can drop bulk using a condition sign (>,<,<>), for example: Alter table t drop partition (PART_COL>1); It will drop all partitions from 2011 to 2014. Wrapping Up. In this post, we have seen how we can add multiple partitions as well as drop multiple partitions from the hive table. We can drop multiple specific partitions as well as any range kind of partition. Sharing is caring! Example 4-45 Converting to a Hybrid Range-Partitioned Table. CREATE TABLE internal_to_hypt_table ( prod_id NUMBER NOT NULL, cust_id NUMBER NOT NULL, time_id DATE NOT NULL, channel_id NUMBER NOT NULL, promo_id NUMBER NOT NULL, quantity_sold NUMBER(10,2) NOT NULL, amount_sold NUMBER(10,2) NOT NULL ) PARTITION by range (time_id) (PARTITION sales_2014 VALUES LESS THAN (TO_DATE('01-01-2015','dd-mm ... Mar 06, 2018 · 2.Creating input file for dynamic partitioning: 3.Loading input file into user1 table: The above dataset needs to be copied into table user1. 4.Setting of parameters for dynamic partitioning: To use the dynamic partitioning in hive we need to set the below parameters in hive shell or in hive-site.xml file. Adding a Partition to a List-Partitioned Table. Adding a Partition to an Interval-Partitioned Table. About Adding Partitions to a Composite *-Hash Partitioned Table. About Adding Partitions to a Composite *-List Partitioned Table. About Adding Partitions to a Composite *-Range Partitioned Table. About Adding a Partition or Subpartition to a ... You can drop the partitions using the following command: ALTER TABLE table_name DROP [IF EXISTS] PARTITION partition_spec [, PARTITION partition_spec,...] [IGNORE PROTECTION] [PURGE]; If trash is configured, then data will be moved to the.Trash/Current directory. To drop a partition from a Hive table, this works: ALTER TABLE foo DROP PARTITION(ds = 'date')...but it should also work to drop all partitions prior to date. ALTER TABLE foo DROP PARTITION(ds < 'date') This task is to implement ALTER TABLE DROP PARTITION for all of the comparators, < > <= >= <> = != instead of just for =. It will drop all partitions from 2011 to 2014. Wrapping Up. In this post, we have seen how we can add multiple partitions as well as drop multiple partitions from the hive table. We can drop multiple specific partitions as well as any range kind of partition. Sharing is caring! See full list on docs.microsoft.com Aug 30, 2016 · A range of the partition column forms a partition which is stored in its own sub directory within the data directory of the table. Hive supports the use of one or multiple partition columns. There are two partitioning approaches that are supported in Hive. These are dynamic partitioning and static partitioning. For example, you might drop a group of partitions corresponding to a particular date range after the data "ages out": alter table historical_data drop partition (year < 1995); alter table historical_data drop partition (year = 1996 and month between 1 and 6); See full list on tutorialspoint.com First two partitions are incorrect partitions created due to a bug in my insert hive script. Later some days, i found this and i want to drop these two partitions somehow. I tried multiple ALTER table DROP partitions, but nothing worked for me. Nov 14, 2018 · I run this to drop the table: ALTER TABLE table_name drop col_name; but I am getting ... expecting PARTITION near 'drop' in drop partition statement 30475/hadoop-hive-how-to-drop-a-table Toggle navigation This is the general syntax for the drop partition syntax in Apache Hive: ALTER TABLE table_name DROP [IF EXISTS] PARTITION partition_spec PURGE; So the syntax to drop a range of partitions in a table that uses year as a partitioning column: ALTER TABLE mytable DROP [IF EXISTS] PARTITION (year>2019) PURGE; This is the general syntax for the drop partition syntax in Apache Hive: ALTER TABLE table_name DROP [IF EXISTS] PARTITION partition_spec PURGE; So the syntax to drop a range of partitions in a table that uses year as a partitioning column: ALTER TABLE mytable DROP [IF EXISTS] PARTITION (year>2019) PURGE; The following statements provide an example of dropping partition dec98 from the sales table, then rebuilding its global nonpartitioned index. ALTER TABLE sales DROP PARTITION dec98; ALTER INDEX sales_area_ix REBUILD; If index sales_area_ix were a range-partitioned global index, then all partitions of the index would require rebuilding. Further ... Nov 01, 2019 · User may create a Hive partition table named "hao3" and does a dynamic partition insert into this Hive partition table from a table named "t3" with some Chinese words inside the partition key. hive> desc t3; OK name string partition_col string age int hive> select * from t3; OK abc 小明 20 def part2 15 ghi part3 36 ijk part4 50 hive> CREATE ...