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https://github.com/abogoyavlensky/django-pg-research
Sample django app for attempts dealing with new functions in django for PostgreSQL 9.4
https://github.com/abogoyavlensky/django-pg-research
Last synced: 19 days ago
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Sample django app for attempts dealing with new functions in django for PostgreSQL 9.4
- Host: GitHub
- URL: https://github.com/abogoyavlensky/django-pg-research
- Owner: abogoyavlensky
- License: mit
- Created: 2015-06-29T12:22:43.000Z (over 9 years ago)
- Default Branch: master
- Last Pushed: 2015-06-30T12:46:31.000Z (over 9 years ago)
- Last Synced: 2024-11-09T16:06:31.064Z (3 months ago)
- Language: Python
- Homepage:
- Size: 137 KB
- Stars: 1
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# django-pg-research
Sample app for attempts dealing with new functions in djanog for PostgreSQL
Installation
---------
$ pip install requirements.pip
$ python manage.py generate
$ python manage.py runserver
*Then you could open browser: http://localhost:8000/ and check some query results*
Explanation and Results
---------
DB schema in postgresql:
List of relations
Schema | Name | Type | Owner
--------+-----------------------------------+----------+--------
public | app_post | table | andrey
public | app_post_id_seq | sequence | andrey
public | app_tag | table | andrey
public | app_tag_id_seq | sequence | andrey
public | auth_group | table | andrey
public | auth_group_id_seq | sequence | andrey
public | auth_group_permissions | table | andrey
public | auth_group_permissions_id_seq | sequence | andrey
public | auth_permission | table | andrey
public | auth_permission_id_seq | sequence | andrey
public | auth_user | table | andrey
public | auth_user_groups | table | andrey
public | auth_user_groups_id_seq | sequence | andrey
public | auth_user_id_seq | sequence | andrey
public | auth_user_user_permissions | table | andrey
public | auth_user_user_permissions_id_seq | sequence | andrey
public | django_admin_log | table | andrey
public | django_admin_log_id_seq | sequence | andrey
public | django_content_type | table | andrey
public | django_content_type_id_seq | sequence | andrey
public | django_migrations | table | andrey
public | django_migrations_id_seq | sequence | andrey
public | django_session | table | andrey
(23 rows)
Post model:
Table "public.app_post"
Column | Type | Modifiers
-------------+------------------------+-------------------------------------------------------
id | integer | not null default nextval('app_post_id_seq'::regclass)
name | character varying(200) | not null
description | text | not null
tags | integer[] |
Indexes:
"app_post_pkey" PRIMARY KEY, btree (id)
"app_post_name_key" UNIQUE CONSTRAINT, btree (name)
"app_post_name_a53642931e0f6d2_like" btree (name varchar_pattern_ops)
SQL Query "overlap":
SELECT "app_post"."id", "app_post"."name", "app_post"."description", "app_post"."tags"
FROM "app_post" WHERE "app_post"."tags" && ARRAY[453, 378, 356, 358, 331]::integer[]
Time:
Post amount: ~50000
Tags amount: ~15000
Without any index
Query time: ~23ms
With btree index
Query time: ~18ms
With GIN index
Query time: ~1.5ms