amazon web services - Dynamo DB batch operations on single table -


i've been going through aws dynamodb docs , cannot figure out what's difference between batchgetitem() , query().

my use case: have table has id primary hash key, , attribute values name , marks. perform batch query returns list of names , marks providing list of id's primary keys.

should use batchgetitem() or query()?

batchgetitem: allows parallelize "getitem" requests languages don't support parallelism (i.e. javascript). includes retrieving items different tables (doesn't support indexes though).

query: allows page through tables hash-range schema (where you'll have multiple results associated hash key) , allows retrieve items indexes on table. note can add additional condition on range key in keyconditions , add conditions on non primary key attribute in queryfilter.

it seems use case calls batchgetitem request, trying retrieve items base table way of hash key.

hope helps!


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