Initial Database Schema

sql/queries/click_log.sql

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+-- name: TrackClick :one
+INSERT INTO click_logs (url_id, referrer, user_agent, ip_address)
+VALUES (
+  $1,
+  $2,
+  $3,
+  $4
+)
+RETURNING *;
+
+-- name: GetClicks :many
+SELECT * FROM click_logs;

sql/queries/urls.sql

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+-- name: CreateURL :one
+INSERT INTO urls (created_at, expires_at, long_url, short_code, is_active)
+VALUES (
+  $1,
+  $2,
+  $3,
+  $4,
+  $5
+)
+RETURNING *;
+
+-- name: GetURLs :many
+SELECT * FROM urls;
+
+-- name: GetURLByShortCode :one
+SELECT url_id, long_url FROM urls WHERE is_active = true AND short_code = $1;
+
+-- name: SetActive :one
+UPDATE urls SET is_active = $1 WHERE url_id = $2 RETURNING *;
+
+-- name: DeleteURL :one
+DELETE FROM urls WHERE url_id = $1 RETURNING *;

sql/schema/001_create_url_table.sql

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+-- +goose Up
+CREATE TABLE urls (
+    url_id SERIAL PRIMARY KEY,
+    long_url TEXT NOT NULL,
+    short_code VARCHAR(10) UNIQUE NOT NULL,
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP NOT NULL,
+    expires_at TIMESTAMP WITH TIME ZONE,
+    is_active BOOLEAN DEFAULT TRUE NOT NULL
+);
+
+-- Crucial index for lightning-fast lookups when redirecting
+CREATE INDEX idx_urls_short_code ON urls(short_code);
+
+-- +goose Down
+DROP INDEX idx_urls_short_code;
+DROP TABLE urls;

sql/schema/002_create_click_logs_table.sql

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+-- +goose Up
+CREATE TABLE click_logs (
+    click_id BIGSERIAL PRIMARY KEY,
+    url_id INT NOT NULL REFERENCES urls(url_id) ON DELETE CASCADE,
+    clicked_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    referrer VARCHAR(255),
+    user_agent TEXT,
+    ip_address VARCHAR(45) -- Accommodates both IPv4 and IPv6
+);
+
+-- Index to optimize analytics queries for a specific link
+CREATE INDEX idx_click_logs_url_id ON click_logs(url_id);
+
+-- +goose Down
+DROP INDEX idx_click_logs_url_id;
+DROP TABLE click_logs;