Getting StartedΒΆ

Install DQL with pip:

pip install dql

Since DQL uses boto under the hood, the authentication mechanism is the same. You may either set the AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY environment variables, or pass them in on the command line:

$ dql -a <access key> -s <secret key>

DQL uses us-west-1 as the default region. You can change this by setting the AWS_REGION variable or passing it in on the command line:

$ dql -r us-east-1

You can begin using DQL immediately. Try creating a table and inserting some data

us-west-1> CREATE TABLE posts (username STRING HASH KEY,
         >                     postid NUMBER RANGE KEY,
         >                     ts NUMBER INDEX('ts-index'))
         >                    THROUGHPUT (5, 5);
us-west-1> INSERT INTO posts (username, postid, ts, text)
         > VALUES ('steve', 1, 1386413481, 'Hey guys!'),
         >        ('steve', 2, 1386413516, 'Guys?'),
         >        ('drdice', 3, 1386413575, 'Fun fact: dolphins are dicks');
us-west-1> ls
Name   Status  Read  Write
posts  ACTIVE  5     5

You can query this data in a couple of ways. The first should look familiar

us-west-1> SELECT * FROM posts WHERE username = 'steve';

This performs a table query using the hash key, so it should run relatively quickly. The second way of accessing data is by using a scan

us-west-1> SCAN posts FILTER username = 'steve';

This returns the same data as the SELECT, but it retrieves it with a table scan instead, which is much slower.

You can also perform updates to the data in a familiar way

us-west-1> UPDATE posts SET text = 'Hay gusys!!11' WHERE
         > username = 'steve' AND postid = 1;

The Queries section has more details. Check it out for more information on the performance implications and query options.

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