Expression attribute names for this index (e.g., #created -> created).
Expression attribute values for this index (e.g., :v123 -> 1700000000).
Filter expressions to AND together (already rendered with aliases).
OptionalprojectionOptional list of attributes to project for this index.
OptionalrangeOptional key condition expression for the range key.
OptionalscanOptional scan direction override for the index.
IndexParams