cleanup the ::get_status function. closes #657

git-svn-id: file:///svn/mysql/tokudb-engine/src@3313 c7de825b-a66e-492c-adef-691d508d4ae1

storage/tokudb/ha_tokudb.cc

@@ -1171,28 +1171,27 @@ int ha_tokudb::read_last() {
     and the max used value for the hidden primary key.
 */
 void ha_tokudb::get_status() {
-    int error;
 
     if (!test_all_bits(share->status, (STATUS_PRIMARY_KEY_INIT | STATUS_ROW_COUNT_INIT))) {
         pthread_mutex_lock(&share->mutex);
-
+        if (!(share->status & STATUS_PRIMARY_KEY_INIT)) {
             (void) extra(HA_EXTRA_KEYREAD);
-        error = read_last();
+            int error = read_last();
             (void) extra(HA_EXTRA_NO_KEYREAD);
-
             if (error == 0) {
-            if (!(share->status & STATUS_PRIMARY_KEY_INIT)) {
                 share->auto_ident = uint5korr(current_ident);
-            }
 
                 // mysql may not initialize the next_number_field here
                 // so we do this in the get_auto_increment method
+                // index_last uses record[1]
+                assert(table->next_number_field == 0);
                 if (table->next_number_field) {
                     share->last_auto_increment = table->next_number_field->val_int_offset(table->s->rec_buff_length);
                     if (tokudb_debug & TOKUDB_DEBUG_AUTO_INCREMENT) 
                         printf("%d:%s:%d:init auto increment:%lld\n", my_tid(), __FILE__, __LINE__, share->last_auto_increment);
                 }
             }
+        }
 
         if (!share->status_block) {
             char name_buff[FN_REFLEN];