Projection applied to ordinary reads (findById, query, internal
prefetches) on a table with a vector index, excluding the vector attribute.
DynamoDB has no exclusion form, so this is an inclusion list: the union of
table aliases across every entity mapped to the table, minus the vector
alias. The union is what makes it safe on adjacency-list queries whose
results span entity types. It saves network bytes and latency, not billed
capacity — reads bill on full item size regardless of projection
Projection applied to ordinary reads (
findById,query, internal prefetches) on a table with a vector index, excluding the vector attribute. DynamoDB has no exclusion form, so this is an inclusion list: the union of table aliases across every entity mapped to the table, minus the vector alias. The union is what makes it safe on adjacency-list queries whose results span entity types. It saves network bytes and latency, not billed capacity — reads bill on full item size regardless of projection