Test - Postgresql - Data Querying

Tester of the Postgresql ability of querying speed on series data

Repository Structure

build/, containing the generated .class files after compiling the java code;
logs/, containing the log information of the queries executed;
resources/, containing the PostgreSQL driver, the database credentials file and the logger properties;
src/, containing the java source files;
standalone/, containing the JAR standalone version of this repository.

In the main directory, there is:

compile_and_run.bash, a bash file containing the commands for compiling the java code and running it.

Create the folder build;
Create the folder logs;
Inside the folder resources,
- Create a file called server_postgresql_credentials.txt, containing the username (first line) and the password (second line) to access the server PostgreSQL database;
- Copy-paste the indicated PostgreSQL driver (called postgresql-42.2.14.jar);
Execute bash compile_and_run.bash

Since I couldn't manage to find a way with the command line, I used Eclipse:

Create the folder standalone;
Open the project in Eclipse;
Set Java 8 as the default JRE:
- Window > Preferences > Java > Installed JREs;
- Select Java 8;
- Apply and Close;
Set Java 8 as the compiler version:
- Window > Preferences > Java > Compiler;
- Compiler compliance level: 1.8;
- Apply and Close;
Create the JAR file:
- Right-click on the project folder > Export;
- Java > Runnable JAR file > Next;
- Launch Configuration: Main;
- Export destination: test_postgresql_data_querying/standalone/DataQueryingTest.jar;
- Finish.
Execute the JAR file:
- If you have this repository available:
  - From the main directory, execute java -jar standalone/DataQueryingTest.jar.
- If you need a proper standalone version:
  - Check the next paragraph.

Connect to the unibz VPN through Cisco AnyConnect;
Open the terminal:
- Execute ssh -t sfracalossi@ironlady.inf.unibz.it "cd /data/sfracalossi ; bash";
- Execute mkdir postgresql;
- Execute mkdir postgresql/standalone_query;
- Execute mkdir postgresql/standalone_query/resources;
Send the JAR and the help files from another terminal (not connected through SSH):
- Execute scp standalone/DataQueryingTest.jar sfracalossi@ironlady.inf.unibz.it:/data/sfracalossi/postgresql/standalone_query;
- Execute scp resources/server_postgresql_credentials.txt sfracalossi@ironlady.inf.unibz.it:/data/sfracalossi/postgresql/standalone_query/resources;
- Execute scp resources/logging.properties sfracalossi@ironlady.inf.unibz.it:/data/sfracalossi/postgresql/standalone_query/resources;
Execute the JAR file (use the terminal connected through SSH):
- Execute cd postgresql/standalone_query;
- Execute nohup java -jar DataQueryingTest.jar [l/s] [test_table/test_table_n] > logs/out.txt &.