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doc-exports/docs/dws/dev/dws_04_0443.html
Lu, Huayi e6fa411af0 DWS DEV 830.201 version 
Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Co-authored-by: Lu, Huayi <luhuayi@huawei.com>
Co-committed-by: Lu, Huayi <luhuayi@huawei.com>
2024-05-16 07:24:04 +00:00

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Using Partitioned Tables

Partitioning refers to splitting what is logically one large table into smaller physical pieces based on specific schemes. The table based on the logic is called a partitioned table, and a physical piece is called a partition. Data is stored on these smaller physical pieces, namely, partitions, instead of the larger logical partitioned table. A partitioned table has the following advantages over an ordinary table:

  1. High query performance: The system queries only the concerned partitions rather than the whole table, improving the query efficiency.
  2. High availability: If a partition is faulty, data in the other partitions is still available.
  3. Easy maintenance: You only need to fix the faulty partition.

GaussDB(DWS) supports range partitioned tables and list partitioned tables.