mirror of https://github.com/dbcli/pgcli
329 lines
8.9 KiB
ReStructuredText
329 lines
8.9 KiB
ReStructuredText
A REPL for Postgres
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-------------------
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|Build Status| |CodeCov| |PyPI| |Landscape| |Gitter|
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This is a postgres client that does auto-completion and syntax highlighting.
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Home Page: http://pgcli.com
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MySQL Equivalent: http://mycli.net
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.. image:: screenshots/pgcli.gif
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.. image:: screenshots/image01.png
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Quick Start
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-----------
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If you already know how to install python packages, then you can simply do:
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::
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$ pip install -U pgcli
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or
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$ sudo apt-get install pgcli # Only on Debian based Linux (e.g. Ubuntu, Mint, etc)
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$ brew install pgcli # Only on macOS
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If you don't know how to install python packages, please check the
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`detailed instructions`_.
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If you have `problems with psycopg2 wheels`_, use the following flags to install psycopg2 from
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source:
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::
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$ pip install pgcli --no-binary :all: psycopg2
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.. _`detailed instructions`: https://github.com/dbcli/pgcli#detailed-installation-instructions
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.. _`problems with psycopg2 wheels`: http://initd.org/psycopg/articles/2018/02/08/psycopg-274-released/
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Usage
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-----
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::
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$ pgcli [database_name]
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or
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$ pgcli postgresql://[user[:password]@][netloc][:port][/dbname][?extra=value[&other=other-value]]
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Examples:
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::
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$ pgcli local_database
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$ pgcli postgres://amjith:pa$$w0rd@example.com:5432/app_db?sslmode=verify-ca&sslrootcert=/myrootcert
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Features
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--------
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The `pgcli` is written using prompt_toolkit_.
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* Auto-completes as you type for SQL keywords as well as tables and
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columns in the database.
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* Syntax highlighting using Pygments.
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* Smart-completion (enabled by default) will suggest context-sensitive
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completion.
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- ``SELECT * FROM <tab>`` will only show table names.
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- ``SELECT * FROM users WHERE <tab>`` will only show column names.
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* Primitive support for ``psql`` back-slash commands.
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* Pretty prints tabular data.
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Note: `pgcli` uses the `tabulate`_ package to pretty-print tables. This library does smart formatting
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of numbers, which can sometimes lead to unexpected output. See `this issue`_ for more details.
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.. _prompt_toolkit: https://github.com/jonathanslenders/python-prompt-toolkit
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.. _tabulate: https://pypi.python.org/pypi/tabulate
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.. _this issue: https://github.com/dbcli/pgcli/issues/617
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Config
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------
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A config file is automatically created at ``~/.config/pgcli/config`` at first launch.
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See the file itself for a description of all available options.
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Contributions:
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--------------
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If you're interested in contributing to this project, first of all I would like
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to extend my heartfelt gratitude. I've written a small doc to describe how to
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get this running in a development setup.
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https://github.com/dbcli/pgcli/blob/master/DEVELOP.rst
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Please feel free to reach out to me if you need help.
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My email: amjith.r@gmail.com, Twitter: `@amjithr <http://twitter.com/amjithr>`_
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Detailed Installation Instructions:
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-----------------------------------
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macOS:
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======
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The easiest way to install pgcli is using Homebrew.
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::
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$ brew install pgcli
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Done!
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Alternatively, you can install ``pgcli`` as a python package using a package
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manager called called ``pip``. You will need postgres installed on your system
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for this to work.
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In depth getting started guide for ``pip`` - https://pip.pypa.io/en/latest/installing.html.
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::
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$ which pip
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If it is installed then you can do:
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::
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$ pip install pgcli
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If that fails due to permission issues, you might need to run the command with
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sudo permissions.
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::
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$ sudo pip install pgcli
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If pip is not installed check if easy_install is available on the system.
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::
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$ which easy_install
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$ sudo easy_install pgcli
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Linux:
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======
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In depth getting started guide for ``pip`` - https://pip.pypa.io/en/latest/installing.html.
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Check if pip is already available in your system.
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::
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$ which pip
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If it doesn't exist, use your linux package manager to install `pip`. This
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might look something like:
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::
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$ sudo apt-get install python-pip # Debian, Ubuntu, Mint etc
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or
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$ sudo yum install python-pip # RHEL, Centos, Fedora etc
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``pgcli`` requires python-dev, libpq-dev and libevent-dev packages. You can
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install these via your operating system package manager.
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::
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$ sudo apt-get install python-dev libpq-dev libevent-dev
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or
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$ sudo yum install python-devel postgresql-devel
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Then you can install pgcli:
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::
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$ sudo pip install pgcli
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Docker
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======
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Pgcli can be run from within Docker. This can be useful to try pgcli without
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installing it, or any dependencies, system-wide.
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To build the image:
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::
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$ docker build -t pgcli .
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To create a container from the image:
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::
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$ docker run --rm -ti pgcli pgcli <ARGS>
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To access postgresql databases listening on localhost, make sure to run the
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docker in "host net mode". E.g. to access a database called "foo" on the
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postgresql server running on localhost:5432 (the standard port):
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::
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$ docker run --rm -ti --net host pgcli pgcli -h localhost foo
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To connect to a locally running instance over a unix socket, bind the socket to
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the docker container:
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::
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$ docker run --rm -ti -v /var/run/postgres:/var/run/postgres pgcli pgcli foo
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IPython
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=======
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Pgcli can be run from within `IPython <https://ipython.org>`_ console. When working on a query,
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it may be useful to drop into a pgcli session without leaving the IPython console, iterate on a
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query, then quit pgcli to find the query results in your IPython workspace.
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Assuming you have IPython installed:
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::
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$ pip install ipython-sql
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After that, run ipython and load the ``pgcli.magic`` extension:
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::
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$ ipython
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In [1]: %load_ext pgcli.magic
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Connect to a database and construct a query:
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::
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In [2]: %pgcli postgres://someone@localhost:5432/world
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Connected: someone@world
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someone@localhost:world> select * from city c where countrycode = 'USA' and population > 1000000;
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+------+--------------+---------------+--------------+--------------+
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| id | name | countrycode | district | population |
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|------+--------------+---------------+--------------+--------------|
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| 3793 | New York | USA | New York | 8008278 |
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| 3794 | Los Angeles | USA | California | 3694820 |
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| 3795 | Chicago | USA | Illinois | 2896016 |
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| 3796 | Houston | USA | Texas | 1953631 |
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| 3797 | Philadelphia | USA | Pennsylvania | 1517550 |
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| 3798 | Phoenix | USA | Arizona | 1321045 |
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| 3799 | San Diego | USA | California | 1223400 |
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| 3800 | Dallas | USA | Texas | 1188580 |
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| 3801 | San Antonio | USA | Texas | 1144646 |
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+------+--------------+---------------+--------------+--------------+
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SELECT 9
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Time: 0.003s
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Exit out of pgcli session with ``Ctrl + D`` and find the query results:
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::
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someone@localhost:world>
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Goodbye!
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9 rows affected.
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Out[2]:
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[(3793, u'New York', u'USA', u'New York', 8008278),
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(3794, u'Los Angeles', u'USA', u'California', 3694820),
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(3795, u'Chicago', u'USA', u'Illinois', 2896016),
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(3796, u'Houston', u'USA', u'Texas', 1953631),
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(3797, u'Philadelphia', u'USA', u'Pennsylvania', 1517550),
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(3798, u'Phoenix', u'USA', u'Arizona', 1321045),
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(3799, u'San Diego', u'USA', u'California', 1223400),
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(3800, u'Dallas', u'USA', u'Texas', 1188580),
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(3801, u'San Antonio', u'USA', u'Texas', 1144646)]
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The results are available in special local variable ``_``, and can be assigned to a variable of your
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choice:
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::
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In [3]: my_result = _
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Thanks:
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-------
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A special thanks to `Jonathan Slenders <https://twitter.com/jonathan_s>`_ for
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creating `Python Prompt Toolkit <http://github.com/jonathanslenders/python-prompt-toolkit>`_,
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which is quite literally the backbone library, that made this app possible.
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Jonathan has also provided valuable feedback and support during the development
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of this app.
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`Click <http://click.pocoo.org/>`_ is used for command line option parsing
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and printing error messages.
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Thanks to `psycopg <http://initd.org/psycopg/>`_ for providing a rock solid
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interface to Postgres database.
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Thanks to all the beta testers and contributors for your time and patience. :)
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.. |Build Status| image:: https://api.travis-ci.org/dbcli/pgcli.svg?branch=master
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:target: https://travis-ci.org/dbcli/pgcli
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.. |CodeCov| image:: https://codecov.io/gh/dbcli/pgcli/branch/master/graph/badge.svg
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:target: https://codecov.io/gh/dbcli/pgcli
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:alt: Code coverage report
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.. |Landscape| image:: https://landscape.io/github/dbcli/pgcli/master/landscape.svg?style=flat
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:target: https://landscape.io/github/dbcli/pgcli/master
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:alt: Code Health
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.. |PyPI| image:: https://img.shields.io/pypi/v/pgcli.svg
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:target: https://pypi.python.org/pypi/pgcli/
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:alt: Latest Version
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.. |Gitter| image:: https://badges.gitter.im/Join%20Chat.svg
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:target: https://gitter.im/dbcli/pgcli?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge
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:alt: Gitter Chat
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