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learn-build-service-prod merged 4 commits into from
Jul 29, 2025
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Repo sync for protected branch #2697

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externaldata operator - recommend to use query parameters
zivcaspi Jul 29, 2025
9284e5a
Merge pull request #7015 from zivcaspi/users/zivc/externaldata-and-qu…
prmerger-automator[bot] Jul 29, 2025
f806a78
Merge pull request #7016 from MicrosoftDocs/main
learn-build-service-prod[bot] Jul 29, 2025
ea05861
Merging changes synced from https://github.com/MicrosoftDocs/dataexpl…
Jul 29, 2025
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13 changes: 13 additions & 0 deletions data-explorer/kusto/query/externaldata-operator.md
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Expand Up @@ -41,6 +41,19 @@ The `externaldata` operator returns a table whose schema is defined in the query
| *storageConnectionString* | `string` | :heavy_check_mark:| A [storage connection string](../api/connection-strings/storage-connection-strings.md) of the storage artifact to query. |
| *propertyName*, *propertyValue* | `string` | | A list of optional [supported properties](#supported-properties) that determines how to interpret the data retrieved from storage.

> [!WARN]
> For security reasons, make sure that no credential is specified by the *storageConnectionString* property.
> If the query needs to specify credentials, use [query parameters](./query-parameters-statement.md) to specify the whole connection string.
>
> For example, assuming that the query includes a query parameter called `URI` whose value points at Blob Storage, the query would look like this:
> ```kusto
> declare query_parameters(URI:string);
> externaldata(x:string)[URI]
> ```
>
> If this is not possible (for example, you're using a client that does not support setting query parameters),
> be sure to use [obfuscated string literals](./scalar-data-types/string.md#obfuscated-string-literals).

### Supported properties

| Property | Type | Description |
Expand Down