How do you refresh metadata in Impala?

1 year ago
Emily Johnson
1 minute

To refresh Impala metadata, you can use one of the following two methods:

  1. Execute the INVALIDATE METADATA command in the Impala Shell:
    Run the following command in the Impala Shell:
  2. Delete metadata.
  3. This will cause Impala to reload metadata information for all databases, tables, and partitions.
  4. To refresh the metadata for a specific table in Impala, run the REFRESH command in the Impala Shell.
  5. Update the table with new data.
  6. Alternatively, you can refresh the metadata for the entire database.
  7. UPDATE all data in the database named database_name;
  8. This will allow Impala to reload the metadata information for a specified table or an entire database.

Regardless of the method used, Impala will reload metadata and update its internal cache to reflect the latest database, table, and partition information.

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