7.1.1.2. Indexers and Data Sources

7.1.1.2. Indexers and Data Sources

Indexers automate the data pipeline from source systems into your search index. Instead of pushing documents manually, indexers pull changes on a schedule.

Supported data sources:

• Azure Blob Storage (documents, images)
• Azure SQL Database
• Azure Cosmos DB
• Azure Table Storage

Change detection strategies:

• High water mark: Track last-modified timestamp column
• SQL integrated: Use SQL change tracking
• Soft delete: Mark deleted items instead of removing

Indexer schedule: Run once, on-demand, or on schedule (minimum 5 minutes interval)

When not to use indexers: Real-time updates (too slow), non-supported sources, complex transformations (use push API instead)