Encrypting network traffic
Looker strongly recommends encrypting network traffic between the Looker application and your database. Consider one of the options described on the Enabling secure database access documentation page.
Configuring Denodo 7 or Denodo 8 for Looker
Preparing Denodo 7 or Denodo 8 for Looker requires a few steps:
Import a custom function
To support symmetric aggregates, a custom function (BASE64_TO_BASE10) has to be added to the Denodo VDP Server. For instructions, see Denodo's Knowledge Base article on Connecting Looker to Denodo.
Grant the database user appropriate permissions
Looker will require SELECT access to any tables or databases you would like to query within Looker. Ensure the database user with which you are connecting to Looker can access these tables.
Feature support
For Looker to support some features, your database dialect must also support them.
Denodo 7
Denodo 7 supports the following features as of Looker 23.4:
| Feature | Supported? |
|---|---|
| Support Level | Supported |
| Symmetric Aggregates | Yes |
| Derived Tables | Yes |
| Persistent SQL Derived Tables | No |
| Persistent Native Derived Tables | No |
| Stable Views | No |
| Query Killing | Yes |
| Pivots | No |
| Timezones | No |
| SSL | Yes |
| Subtotals | Yes |
| JDBC Additional Params | Yes |
| Case Sensitive | Yes |
| Location Type | Yes |
| List Type | No |
| Percentile | No |
| Distinct Percentile | No |
| SQL Runner Show Processes | Yes |
| SQL Runner Describe Table | Yes |
| SQL Runner Show Indexes | Yes |
| SQL Runner Select 10 | Yes |
| SQL Runner Count | Yes |
| SQL Explain | No |
| Oauth Credentials | No |
| Context Comments | Yes |
| Connection Pooling | No |
| HLL Sketches | No |
| Aggregate Awareness | No |
| Incremental PDTs | No |
| Milliseconds | No |
| Microseconds | No |
| Materialized Views | No |
| Approximate Count Distinct | No |
Denodo 8
Denodo 8 supports the following features as of Looker 23.4:
| Feature | Supported? |
|---|---|
| Support Level | Supported |
| Symmetric Aggregates | Yes |
| Derived Tables | Yes |
| Persistent SQL Derived Tables | No |
| Persistent Native Derived Tables | No |
| Stable Views | No |
| Query Killing | Yes |
| Pivots | No |
| Timezones | No |
| SSL | Yes |
| Subtotals | Yes |
| JDBC Additional Params | Yes |
| Case Sensitive | Yes |
| Location Type | Yes |
| List Type | No |
| Percentile | No |
| Distinct Percentile | No |
| SQL Runner Show Processes | Yes |
| SQL Runner Describe Table | Yes |
| SQL Runner Show Indexes | Yes |
| SQL Runner Select 10 | Yes |
| SQL Runner Count | Yes |
| SQL Explain | No |
| Oauth Credentials | No |
| Context Comments | Yes |
| Connection Pooling | No |
| HLL Sketches | No |
| Aggregate Awareness | No |
| Incremental PDTs | No |
| Milliseconds | No |
| Microseconds | No |
| Materialized Views | No |
| Approximate Count Distinct | No |
Next steps
After completing the database configuration, you can connect to the database from Looker using these directions.