Enforce Schema validation in DynamoDB - amazon-dynamodb

Question

Is it possible to enforce table level schema validation on DynamoDB
For instance, consider the following table
aws dynamodb create-table\
--table-name spaces-tabs-votes\
--attribute-definitions AttributeName=id,AttributeType=S
--key-schema AttributeName=id,KeyType=HASH
--provisioned-throughput ReadCapacityUnits=1,WriteCapacityUnits=1
--endpoint-url http://localhost:8000
At time T, table looked like below (Notice that votes is of type N)
$ aws dynamodb scan --table-name spaces-tabs-votes
{
"Count": 2,
"Items": [
{
"votes": {
"N": "104"
},
"id": {
"S": "space"
}
},
{
"votes": {
"N": "60"
},
"id": {
"S": "tab"
}
}
],
"ScannedCount": 2,
"ConsumedCapacity": null
}
At time T+1, I was able to change the type of votes from N to S. All I had to do was do a put with votes set as String 1 instead of incrementing the already existing N value.
$ aws dynamodb scan --table-name spaces-tabs-votes
{
"Count": 2,
"Items": [
{
"votes": {
"N": "104"
},
"id": {
"S": "space"
}
},
{
"votes": {
"S": "1"
},
"id": {
"S": "tab"
}
}
],
"ScannedCount": 2,
"ConsumedCapacity": null
}
I would like schema enforcement - i.e, if the record that I am trying to post to DynamoDB doesn't conform to a schema, I want it to throw an exception. Is it possible at all?