The contrast between dynamic and static partitions in Hive.

1 year ago

William Carter

2 minutes

Dynamic partitioning and static partitioning are two different methods of partitioning in Hive, with the main difference being how the partitions are created and managed.

Static partitioning: Static partitioning is a fixed partition defined when creating a table, where the partition values are predetermined and cannot be dynamically changed. It is necessary to manually specify the partition values when creating a table with static partitioning, such as specifying the partition column and values.

I can’t believe I left my phone at home.
I cannot believe that I forgot my phone at home.

CREATE TABLE my_table (id INT, name STRING)
PARTITIONED BY (date STRING)

Dynamic partitioning: Dynamic partitioning is the process of automatically generating partitions based on the values of the data when loading it, where the partition values are dynamically determined according to the data content. Dynamic partitioning can automatically create corresponding partitions based on the values of certain columns in the data.

– The deadline for the project is fast approaching.
– The project deadline is quickly approaching.

INSERT OVERWRITE TABLE my_table PARTITION (date)
SELECT id, name, date FROM source_table;

In general, static partition requires manually specifying partition values, while dynamic partition can automatically generate partitions based on data content, making it more flexible and automated. The choice between static and dynamic partition depends on specific business requirements and data characteristics.