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# Type of request: This is a ...

[ ] bug report
[X ] feature request

# Detailed description

I'm using localstack to create a dynamoDb table locally with a dynamodb stream and a flink application consuming data from the stream
The shardId created in localstack follows this format

shardId-000000000000-798cedd84a2953c5af70a131f8701f35

Flink expects this format
shardId-00000001592367572726-07776efd

The difference is just after the prefix shardId.
Normally the real shardId created by amazon use is composed by shardId prefix, 20-digit timestamp and 0-36 or more characters separated by '-'

The current shardId format is not valid for flink applications and it's not following the real pattern used by amazon

## Expected behavior

ShardId must follow the pattern
shardId prefix, 20-digit timestamp and 0-36 or more characters separated by '-'

## Actual behavior

The shardId follows the pattern
shardId prefix, 12 0s and 33 characters separated by '-'

# Steps to reproduce

Create a dynamodb table

## Command used to start LocalStack

I'm using docker and docker compose to run localstack


## Client code (AWS SDK code snippet, or sequence of "awslocal" commands)

aws --endpoint-url=http://localhost:4566 dynamodb create-table \
    --table-name temp4 \
    --attribute-definitions AttributeName=partition_key,AttributeType=S AttributeName=sort_key,AttributeType=S \
    --key-schema AttributeName=partition_key,KeyType=HASH AttributeName=sort_key,KeyType=RANGE \
    --provisioned-throughput ReadCapacityUnits=100,WriteCapacityUnits=100 \
    --stream-specification StreamEnabled=true,StreamViewType=NEW_AND_OLD_IMAGES


return ('%s...' % data[:max_length]) if len(data or '') > max_length else data
def parallelize(func, list, size=None):
    if not size:
        size = len(list)
    if size <= 0:
        return None
    pool = Pool(size)
    result = pool.map(func, list)
    pool.close()
    pool.join()
    return result
def isoformat_milliseconds(t):
    try:
        return t.isoformat(timespec='milliseconds')
    except TypeError:
        return t.isoformat()[:-3]
def get_shard_id(sequence_number):
    shard_id = 'shardId-0000000{0}{1}'.format(float(time.time()) * 1000, sequence_number)
    return shard_id
CACHE_FILE_PATTERN = CACHE_FILE_PATTERN.replace('_random_dir_', short_uid())