core/src/main/java/com/orientechnologies/orient/core/sql/OCommandExecutorSQLDropCluster.java
public Object execute(final Map<Object, Object> iArgs) {
    if (clusterName == null)
      throw new OCommandExecutionException("Cannot execute the command because it has not been parsed yet");

    final ODatabaseDocumentInternal database = getDatabase();

    // CHECK IF ANY CLASS IS USING IT
    final int clusterId = database.getStorage().getClusterIdByName(clusterName);
    for (OClass iClass : database.getMetadata().getSchema().getClasses()) {
      for (int i : iClass.getClusterIds()) {
        if (i == clusterId)
          // IN USE
          return false;
      }
    }

    // REMOVE CACHE OF COMMAND RESULTS IF ACTIVE
    database.getMetadata().getCommandCache().invalidateResultsOfCluster(clusterName);

    database.dropCluster(clusterId, true);
    return true;
  }
public Object execute(final Map<Object, Object> iArgs) {
    if (clusterName == null)
      throw new OCommandExecutionException("Cannot execute the command because it has not been parsed yet");

    final ODatabaseDocumentInternal database = getDatabase();

    // CHECK IF ANY CLASS IS USING IT
    final int clusterId = database.getStorage().getClusterIdByName(clusterName);
    for (OClass iClass : database.getMetadata().getSchema().getClasses()) {
      for (int i : iClass.getClusterIds()) {
        if (i == clusterId)
          // IN USE
          return false;
      }
    }

    // REMOVE CACHE OF COMMAND RESULTS IF ACTIVE
    database.getMetadata().getCommandCache().invalidateResultsOfCluster(clusterName);

    database.dropCluster(clusterId, true);
    return true;
  }
public Object execute ( final Map < Object , Object > iArgs ) { if ( clusterName == null ) throw new OCommandExecutionException ( "Cannot execute the command because it has not been parsed yet" ) ; final ODatabaseDocumentInternal database = getDatabase ( ) ; // CHECK IF ANY CLASS IS USING IT
 final int clusterId = database . getStorage ( ) . getClusterIdByName ( clusterName ) ; for ( OClass iClass : database . getMetadata ( ) . getSchema ( ) . getClasses ( ) ) { for ( int i : iClass . getClusterIds ( ) ) { if ( i == clusterId ) // IN USE
 return false ; } } // REMOVE CACHE OF COMMAND RESULTS IF ACTIVE
 database . getMetadata ( ) . getCommandCache ( ) . invalidateResultsOfCluster ( clusterName ) ; database . dropCluster ( clusterId , true ) ; return true ; }
Execute the DROP CLUSTER.
Execute the DROP CLUSTER .