Add support for live creating/deleting GlobalSecondaryIndexes

[mhart]

http://aws.amazon.com/releasenotes/Amazon-DynamoDB/1151140518858718

[adrianpraja]

Hi Michael

Just a +1 on this 👍

I'm building an SQL library on top of aws-sdk and using [email protected] for npm tests and I have

DROP INDEX idx_name ON tbl_name

which translates to aws-sdk .updateTable(...)

{
	"TableName": "tbl_name",
	"GlobalSecondaryIndexUpdates": [
		{
			"Delete": {
				"IndexName": "idx_name"
			}
		}
	]
}

still returns the index in place

would help also just to change theIndexStatus to DELETING and disable further operations on it, even if the index is not deleted 😄