pgplsql-useful-examples

Pgplsql useful scripts examples

This a repository for Pgplsql useful scripts examples.

ETL's

Some examples of a data migration between 2 PostgreSQL databases, related with a Aeronautic sector project. Some useful things that you can found there are:

Use of the Cursors
Cleaning of data
And more things...

Tree queries

Use:

Give permissions to execute_all.sh file:

chmod +x execute_all.sh

sudo -i -u postgres

Move to the path where your clone this repository and then go to tree-queries folder:

cd tree-queries/

Finally, execute the execute_all.sh file:

./execute_all.sh

Structure:

Files are contained inside of the temporal_schema folder, with the below structure:

a) schema -> functions: generating queries with tree json format.

b) schema -> tables: examples tables.

c) schema -> data: mock data.

Tree postgis queries

Use:

Give permissions to execute_all.sh file:

chmod +x execute_all.sh

sudo -i -u postgres

Move to the path where your clone this repository and then go to tree-postgis-queries folder:

cd tree-postgis-queries/

Finally, execute the execute_all.sh file:

./execute_all.sh

Structure:

Files are contained inside of the temporal_schema folder, with the below structure:

a) schema -> functions: generating queries with tree json format:

udf_spots_nearby_current_user_position: get the first 5 nearest records disregard how far the are away from the current location.
udf_images_get.sql: get the images list related with a spot.
udf_categories_get.sql: get the categories list related with a spot.
udf_like_actions_get.sql: get the likes list related with a spot.
udf_comments_get.sql: get the comments related with a spot.
udf_commented_liked_get.sql: get the likes related with a comment of a spot.
udf_users_tagged_get.sql: get the users tagged related with a spot.
udf_tags_get.sql: get the tags related with a spot.
udf_spots_nearby_within_X_kilometers_from_current_user_position: get the places within 2 km (or you can custom) from the current position where you are. This search also include places of your friends.
udf_spots_nearby_by_filter_place_name.sql: get the places within 2 km (or you can custom) from the current position where you are, filter by a place name. This search also include places of your friends.
udf_spot_timeline_get.sql: get the places that belongs to my friends or me.
udf_spot_profile_get.sql: get the user profile of an account.

b) schema -> tables: examples tables. In "spots" table you can find PostGIS geometry columns (geom and position) used in the functions.

c) schema -> data: mock data.

Database model schema:

Response status codes:

udf_spots_nearby_within_X_kilometers_from_current_user_position return a response with the below standard:

Success case:

{ "status" : "success", "data" : [{ }] }
Fail case:

{ "status" : "fail", "data" : [{ } ]}

See more documentation in: postgis

Plpython3u examples

Use:

Assuming you are on Ubuntu, install plpython3 as follow:

sudo apt-get update

sudo apt-get install postgresql-contrib postgresql-plpython3

Move to the path where your clone this repository and then go to plpython3u-examples folder:

cd plpython3u-examples/

Create your virtualenv and install the requirements:

virtualenv env --python=python3
source env/bin/activate

pip install -r requirements.txt

Give permissions to execute_all.sh file:

chmod +x execute_all.sh

sudo -i -u postgres

Finally, execute the execute_all.sh file:

./execute_all.sh

Structure:

Files are contained inside of the temporal_schema folder, with the below structure:

a) schema -> functions:

udf_reverse_geocoding_geopy: get full adress of a point from latitude and longitude parameters using geopy.

See more documentation in: geopy

Contributions

All work to improve performance is good

Enjoy it!

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