Add indexes (#7)

* Add indexes

* Spotbugs

Author: timja

src/main/java/io/jenkins/plugins/junit/storage/database/DatabaseSchemaLoader.java

@@ -5,12 +5,15 @@
 import java.sql.SQLException;
 import javax.sql.DataSource;
 import org.flywaydb.core.Flyway;
+import org.kohsuke.accmod.Restricted;
+import org.kohsuke.accmod.restrictions.NoExternalUse;
 
 import static hudson.init.InitMilestone.SYSTEM_CONFIG_ADAPTED;
 
+@Restricted(NoExternalUse.class)
 public class DatabaseSchemaLoader {
 
-    public static boolean MIGRATED; 
+    static boolean MIGRATED; 
 
     @Initializer(after = SYSTEM_CONFIG_ADAPTED)
     public static void migrateSchema() throws SQLException {

src/main/resources/db/migration/V2020_09_22_0802__indexes.sql

@@ -0,0 +1,6 @@
+CREATE INDEX job_index ON caseresults(job);
+CREATE INDEX job_and_build_index ON caseresults(job, build);
+
+-- possibly worth adding indexes on the package and on the suite but let's see how this goes
+-- any feedback or index contribution welcome
+-- and we can remove them if they aren't useful