feat: add index on actions(time) for time-range query performance (#369)

Co-authored-by: Netcrafts <netcrafts@users.noreply.github.com>

Author: netcrafts

src/main/kotlin/com/github/quiltservertools/ledger/database/DatabaseManager.kt

@@ -122,6 +122,11 @@ object DatabaseManager {
             Tables.Sources,
             Tables.Worlds,
         )
+        try {
+            exec("CREATE INDEX IF NOT EXISTS actions_time ON actions(time)")
+        } catch (e: java.sql.SQLException) {
+            logWarn("Could not create actions_time index (MySQL 8.0.12+ required if using MySQL): ${e.message}")
+        }
         logInfo("Tables created")
     }
 

src/main/kotlin/com/github/quiltservertools/ledger/database/Tables.kt

@@ -55,7 +55,7 @@ object Tables {
 
     object Actions : IntIdTable("actions") {
         val actionIdentifier = reference("action_id", ActionIdentifiers.id).index()
-        val timestamp = timestamp("time")
+        val timestamp = timestamp("time").index("actions_time")
         val x = integer("x")
         val y = integer("y")
         val z = integer("z")