Inverted File Flat (IVF) index is the only type of Neighbor Partition vector index supported. Inverted File Flat Index (IVF Flat or simply IVF) is a partitioned-based index that lets you balance high-search quality with reasonable speed.

• About Neighbor Partition Vector Index
  The default type of index created for a Neighbor Partition vector index is Inverted File Flat.
• Included Columns
  Included columns in vector indexes facilitate faster searches with attribute filters by incorporating non-vector columns within a Neighbor Partition Vector Index.
• Inverted File Flat Index Syntax and Parameters
  Review the syntax and examples for Inverted File Flat vector indexes.