> For the complete documentation index, see [llms.txt](https://docs.datapancake.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.datapancake.com/core-concepts/scan-configurations/source-stream-settings.md).

# Source Stream Settings

## Last Scanned Timestamp (`SOURCE_STREAM_LAST_SCANNED_TIMESTAMP`)

Last timestamp scanned from this data source. Used as part of `SCAN_WHERE_CLAUSE` for incremental scanning.

**How it works:**

* Stored after each successful scan
* Automatically updated when scans complete
* Used to filter records in subsequent scans
* Enables delta/incremental scanning

**Incremental scanning:**

* Set `SCAN_WHERE_CLAUSE` to include timestamp filter (e.g., `WHERE created_date > '<last_scanned_timestamp>'`)
* Scans only new or changed records
* Faster than full scans
* Schema discovery still runs for new data

**Resetting:**

* Remove timestamp from configuration to scan entire data source
* Useful for full re-scanning after schema changes
* Can be cleared manually in configuration


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