Hive Auto-Increment Primary Keys

1 year ago
Jackson Davis
1 minute

Hive does not directly support auto-increment primary keys, but they can be implemented using the following methods:

  1. You can use the ROW_NUMBER() function along with window functions to create an auto-increment primary key. For example:
SELECT ROW_NUMBER() OVER (ORDER BY column_name) AS id, column_name
FROM table_name;
  1. Create a UDF custom function to generate auto-increment primary keys. First, create the UDF function and then call it in the query to produce auto-increment primary keys.
  2. You can use external tools or scripts to generate auto-increment primary keys and insert them into a Hive table.

It is important to note that the methods above all involve additional operations to achieve auto-increment primary keys, as Hive itself does not directly support this feature.

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