尽管运行正常，但在Hive中插入覆盖不会加载数据。

Question

I created the table and and ran Insert Overwrite to load selected data from tables but it not loading the data although it runs ok. Any idea?

Answer 1

Check if your select query returns 0 records. If so, old data doesn't get overwritten.

Answer 2

As of Hive 0.14, if a table has an OutputFormat that implements AcidOutputFormat and the system is configured to use a transaction manager that implements ACID, then INSERT OVERWRITE will be disabled for that table. This is to avoid users unintentionally overwriting transaction history. The same functionality can be achieved by using TRUNCATE TABLE (for non-partitioned tables) or DROP PARTITION followed by INSERT INTO.

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