internal/database/database.go

@@ -1230,24 +1230,17 @@ func (d *Database) GetPrefixDetails(prefix string) ([]LiveRoute, error) {
 
 // GetRandomPrefixesByLength returns a random sample of prefixes with the specified mask length
 func (d *Database) GetRandomPrefixesByLength(maskLength, ipVersion, limit int) ([]LiveRoute, error) {
-	// Select unique prefixes with their most recent route information
 	query := `
-		WITH unique_prefixes AS (
+		SELECT DISTINCT 
-			SELECT prefix, MAX(last_updated) as max_updated
+			prefix, mask_length, ip_version, origin_asn, as_path, 
-			FROM live_routes
+			peer_ip, last_updated
-			WHERE mask_length = ? AND ip_version = ?
+		FROM live_routes
-			GROUP BY prefix
+		WHERE mask_length = ? AND ip_version = ?
-			ORDER BY RANDOM()
+		ORDER BY RANDOM()
-			LIMIT ?
+		LIMIT ?
-		)
-		SELECT lr.prefix, lr.mask_length, lr.ip_version, lr.origin_asn, lr.as_path, 
-			lr.peer_ip, lr.last_updated
-		FROM live_routes lr
-		INNER JOIN unique_prefixes up ON lr.prefix = up.prefix AND lr.last_updated = up.max_updated
-		WHERE lr.mask_length = ? AND lr.ip_version = ?
 	`
 
-	rows, err := d.db.Query(query, maskLength, ipVersion, limit, maskLength, ipVersion)
+	rows, err := d.db.Query(query, maskLength, ipVersion, limit)
 	if err != nil {
 		return nil, fmt.Errorf("failed to query random prefixes: %w", err)
 	}

internal/database/schema.sql

@@ -92,5 +92,3 @@ CREATE INDEX IF NOT EXISTS idx_live_routes_ip_version_mask ON live_routes(ip_ver
 CREATE INDEX IF NOT EXISTS idx_live_routes_last_updated ON live_routes(last_updated);
 -- Indexes for IPv4 range queries
 CREATE INDEX IF NOT EXISTS idx_live_routes_ipv4_range ON live_routes(v4_ip_start, v4_ip_end) WHERE ip_version = 4;
--- Index to optimize COUNT(DISTINCT prefix) queries
-CREATE INDEX IF NOT EXISTS idx_live_routes_ip_mask_prefix ON live_routes(ip_version, mask_length, prefix);