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DynamoDB Query Language

Project description

DQL

Dev Build:build coverage
0.4 Branch:build-0.4 coverage-0.4
Documentation:http://dql.readthedocs.org/
Downloads:http://pypi.python.org/pypi/dql
Source:https://github.com/mathcamp/dql

A simple, SQL-ish language for DynamoDB

Getting Started

Install with pip:

pip install dql

Here are some basic DQL examples to get you going:

Start the REPL:

$ dql -a <access key> -s <secret key>
us-west-1>

Creating a table:

us-west-1> CREATE TABLE forum_threads (name STRING HASH KEY,
         >                             subject STRING RANGE KEY)
         >                             THROUGHPUT (4, 2);

Inserting data:

us-west-1> INSERT INTO forum_threads (name, subject, views, replies)
         > VALUES ('Self Defense', 'Defense from Banana', 67, 4),
         > ('Self Defense', 'Defense from Strawberry', 10, 0),
         > ('Cheese Shop', 'Anyone seen the camembert?', 16, 1);

Queries:

us-west-1> SCAN forum_threads;
us-west-1> COUNT forum_threads WHERE name = 'Self Defense';
us-west-1> SELECT * FROM forum_threads WHERE name = 'Self Defense';

Mutations:

us-west-1> UPDATE forum_threads SET views += 1 WHERE
         > name = 'Self Defense' AND subject = 'Defense from Banana';
us-west-1> DELETE FROM forum_threads WHERE name = 'Cheese Shop';

Changing tables:

us-west-1> ALTER TABLE forum_threads SET THROUGHPUT (8, 4);
us-west-1> DROP TABLE forum_threads;

And don’t forget to use help!

Changelog

0.4.0

  • Breakage: Dropping support for python 3.2 due to lack of botocore support
  • Feature: Support for JSON data types

0.3.2

  • Bug fix: Allow ‘.’ in table names of DUMP SCHEMA command
  • Bug fix: Passing a port argument to local connection doesn’t crash
  • Bug fix: Prompt says ‘localhost’ when connected to DynamoDB local

0.3.1

  • Bug fix: Allow ‘.’ in table names

0.3.0

  • Feature: SELECT and COUNT can have FILTER clause
  • Feature: FILTER clause may OR constraints together

0.2.1

  • Bug fix: Crash when printing ‘COUNT’ queries

0.2.0

  • Feature: Python 3 support

0.1.0

  • First public release

Project details


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