GoWithPostgreSQL
Go code for PostgreSQL. A Go language code which connects to PostgreSQL database for CRUD operation.
Softwares required
Go compiler --> https://go.dev/doc/install
Visual Studio code --> https://code.visualstudio.com/download
PostgreSQL --> https://www.postgresql.org/download/
Step 1
Open a command prompt and cd to your home directory.
On Linux or Mac:
cd
On Windows:
cd %HOMEPATH%
Step 2
Create a GoWithPostgreSQL directory. For example, from your home directory use the following commands:
mkdir GoWithPostgreSQL
cd GoWithPostgreSQL
Step 3
Start your module using the go mod init command.
go mod init gowithpostgresql
Step 4
In your text editor, create main.go and paste the content and save.
Step 5
Build the current module's packages and dependencies.
go mod tidy
Step 6
Prepare the database for the repo.
Step 6a
Create a database named customer
CREATE DATABASE customer
WITH
OWNER = postgres
ENCODING = 'UTF8'
CONNECTION LIMIT = -1;
Step 6b
Create a schema named customer in customer database.
CREATE SCHEMA customer
AUTHORIZATION postgres;
Step 6c
Create a table called customer.
CREATE TABLE IF NOT EXISTS customer.customer
(
customerid bigint NOT NULL GENERATED ALWAYS AS IDENTITY ( INCREMENT 1 START 1 MINVALUE 1 MAXVALUE 9223372036854775807 CACHE 1 ),
firstname character varying(200) COLLATE pg_catalog."default",
lastname character varying(200) COLLATE pg_catalog."default",
CONSTRAINT customer_pkey PRIMARY KEY (customerid)
)
TABLESPACE pg_default;
ALTER TABLE IF EXISTS customer.customer
OWNER to postgres;
Step 6d
Insert few reords to the customer table.
INSERT INTO customer.customer(
firstname, lastname)
VALUES ('John', 'Doe'),
('Richard', 'Roe'),
('Mark', 'Moe');
Step 6e
Create the stored procedure insertcustomer
CREATE OR REPLACE PROCEDURE customer.insertcustomer(
IN firstname character varying,
IN lastname character varying)
LANGUAGE 'sql'
AS $BODY$
INSERT INTO customer.customer(
firstname, lastname)
VALUES (firstname,lastname);
$BODY$;
Step 7
Build the repo and execute the code in the terminal
go build .\main.go
.\main.exe
References
https://go.dev/blog/using-go-modules
https://go.dev/doc/tutorial/create-module
https://go.dev/doc/database/
https://github.com/lib/pq
https://www.postgresql.org/files/documentation/pdf/14/postgresql-14-A4.pdf
