Redshift

Dremio Configuration

JDBC Connection String – Connection string. The connection URL can be found in AWS console.

No authentication method
Master Authentication method (default)
- Username – Redshift user name
- Password – Redshift password
Secret resource url

Record fetch size – Number of records to fetch at once. Set to 0 (zero) to have Dremio automatically decide. Default: 10
Enable legacy dialect

Never refresh – Specifies how often to refresh based on hours, days, weeks, or never.
Never expire – Specifies how often to expire based on hours, days, weeks, or never.

Remove dataset definitions if underlying data is unavailable (Default).
If this box is not checked and the underlying files under a folder are removed or the folder/source is not accessible, Dremio does not remove the dataset definitions. This option is useful in cases when files are temporarily deleted and put back in place with new sets of files.

Dataset Discovery – Refresh interval for top-level source object names such as names of DBs and tables.
- Fetch every – Specify fetch time based on minutes, hours, days, or weeks. Default: 1 hour
Dataset Details – The metadata that Dremio needs for query planning such as information needed for fields, types, shards, statistics, and locality.
- Fetch mode – Specify either Only Queried Datasets, All Datasets, or As Needed. Default: Only Queried Datasets
  - Only Queried Datasets – Dremio updates details for previously queried objects in a source.
    This mode increases query performance because less work is needed at query time for these datasets.
  - All Datasets – Dremio updates details for all datasets in a source. This mode increases query performance because less work is needed at query time.
  - As Needed – Dremio updates details for a dataset at query time. This mode minimized metadata queries on a source when not used, but might lead to longer planning times.
- Fetch every – Specify fetch time based on minutes, hours, days, or weeks. Default: 1 hour
- Expire after – Specify expiration time based on minutes, hours, days, or weeks. Default: 3 hours

You can specify which users can edit. Options include: