How do you refresh metadata in impala?

2 years ago
Benjamin Taylor
1 minute

To refresh metadata in Impala, you can use one of the following commands:

  1. Corrupt metadata.
INVALIDATE METADATA;
  1. Make the metadata invalid.
INVALIDATE METADATA your_database_name;
INVALIDATE METADATA your_table_name;
  1. Renew
REFRESH your_database_name;
REFRESH your_table_name;

These commands will force Impala to reload metadata, allowing it to access the latest information on tables, columns, and partitions. Keep in mind that refreshing metadata may cause a decrease in performance for some queries, as Impala needs to reload metadata. Therefore, consider the current system load and performance requirements before executing the refresh operation.

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