Merge mysql.com:/home/svoj/devel/bk/mysql-4.1

into  mysql.com:/home/svoj/devel/mysql/BUG26881/mysql-4.1-engines

myisam/rt_key.c

@@ -35,6 +35,7 @@ int rtree_add_key(MI_INFO *info, MI_KEYDEF *keyinfo, uchar *key,
 {
   uint page_size = mi_getint(page_buf);
   uint nod_flag = mi_test_if_nod(page_buf);
+  DBUG_ENTER("rtree_add_key");
 
   if (page_size + key_length + info->s->base.rec_reflength <=
       keyinfo->block_length)
@@ -43,22 +44,26 @@ int rtree_add_key(MI_INFO *info, MI_KEYDEF *keyinfo, uchar *key,
     if (nod_flag)
     {
       /* save key */
+      DBUG_ASSERT(_mi_kpos(nod_flag, key) < info->state->key_file_length);
       memcpy(rt_PAGE_END(page_buf), key - nod_flag, key_length + nod_flag); 
       page_size += key_length + nod_flag;
     }
     else
     {
       /* save key */
+      DBUG_ASSERT(_mi_dpos(info, nod_flag, key + key_length +
+                           info->s->base.rec_reflength) <
+                  info->state->data_file_length + info->s->base.pack_reclength);
       memcpy(rt_PAGE_END(page_buf), key, key_length + 
                                          info->s->base.rec_reflength);
       page_size += key_length + info->s->base.rec_reflength;
     }
     mi_putint(page_buf, page_size, nod_flag);
-    return 0;
+    DBUG_RETURN(0);
   }
 
-  return (rtree_split_page(info, keyinfo, page_buf, key, key_length,
-			   new_page) ? -1 : 1);
+  DBUG_RETURN((rtree_split_page(info, keyinfo, page_buf, key, key_length,
+                                new_page) ? -1 : 1));
 }
 
 /*
@@ -90,11 +95,13 @@ int rtree_delete_key(MI_INFO *info, uchar *page_buf, uchar *key,
 int rtree_set_key_mbr(MI_INFO *info, MI_KEYDEF *keyinfo, uchar *key, 
 		      uint key_length, my_off_t child_page)
 {
+  DBUG_ENTER("rtree_set_key_mbr");
+
   if (!_mi_fetch_keypage(info, keyinfo, child_page,
                          DFLT_INIT_HITS, info->buff, 0))
-    return -1;
+    DBUG_RETURN(-1); /* purecov: inspected */
 
-  return rtree_page_mbr(info, keyinfo->seg, info->buff, key, key_length);
+  DBUG_RETURN(rtree_page_mbr(info, keyinfo->seg, info->buff, key, key_length));
 }
 
 #endif /*HAVE_RTREE_KEYS*/

myisam/rt_split.c

@@ -268,13 +268,15 @@ int rtree_split_page(MI_INFO *info, MI_KEYDEF *keyinfo, uchar *page, uchar *key,
                                    info->s->base.rec_reflength);
 
   int max_keys = (mi_getint(page)-2) / (full_length);
+  DBUG_ENTER("rtree_split_page");
+  DBUG_PRINT("rtree", ("splitting block"));
 
   n_dim = keyinfo->keysegs / 2;
   
   if (!(coord_buf= (double*) my_alloca(n_dim * 2 * sizeof(double) *
 				       (max_keys + 1 + 4) +
 				       sizeof(SplitStruct) * (max_keys + 1))))
-    return -1;
+    DBUG_RETURN(-1); /* purecov: inspected */
 
   task= (SplitStruct *)(coord_buf + n_dim * 2 * (max_keys + 1 + 4));
 
@@ -346,12 +348,13 @@ int rtree_split_page(MI_INFO *info, MI_KEYDEF *keyinfo, uchar *page, uchar *key,
   else
     err_code= _mi_write_keypage(info, keyinfo, *new_page_offs,
                                 DFLT_INIT_HITS, new_page);
+  DBUG_PRINT("rtree", ("split new block: %lu", (ulong) *new_page_offs));
 
   my_afree((byte*)new_page);
 
 split_err:
   my_afree((byte*) coord_buf);
-  return err_code;
+  DBUG_RETURN(err_code);
 }
 
 #endif /*HAVE_RTREE_KEYS*/

mysql-test/r/merge.result

@@ -801,3 +801,8 @@ CREATE TABLE tm1(a SMALLINT, b SMALLINT, KEY(a)) ENGINE=MERGE UNION=(t1);
 SELECT * FROM tm1;
 ERROR HY000: Unable to open underlying table which is differently defined or of non-MyISAM type or doesn't exist
 DROP TABLE t1, tm1;
+CREATE TABLE t1(c1 INT) ENGINE=MyISAM;
+CREATE TABLE t2(c1 INT) ENGINE=MERGE UNION=(t1);
+INSERT DELAYED INTO t2 VALUES(1);
+ERROR HY000: Table storage engine for 't2' doesn't have this option
+DROP TABLE t1, t2;

mysql-test/t/merge.test

@@ -428,4 +428,13 @@ CREATE TABLE tm1(a SMALLINT, b SMALLINT, KEY(a)) ENGINE=MERGE UNION=(t1);
 SELECT * FROM tm1;
 DROP TABLE t1, tm1;
 
+#
+# Bug#26464 - insert delayed + update + merge = corruption
+#
+CREATE TABLE t1(c1 INT) ENGINE=MyISAM;
+CREATE TABLE t2(c1 INT) ENGINE=MERGE UNION=(t1);
+--error 1031
+INSERT DELAYED INTO t2 VALUES(1);
+DROP TABLE t1, t2;
+
 # End of 4.1 tests

sql/ha_myisammrg.h

@@ -37,7 +37,7 @@ class ha_myisammrg: public handler
   {
     return (HA_REC_NOT_IN_SEQ | HA_AUTO_PART_KEY | HA_READ_RND_SAME |
 	    HA_NULL_IN_KEY | HA_CAN_INDEX_BLOBS | HA_FILE_BASED |
-            HA_CAN_INSERT_DELAYED | HA_ANY_INDEX_MAY_BE_UNIQUE);
+            HA_ANY_INDEX_MAY_BE_UNIQUE);
   }
   ulong index_flags(uint inx, uint part, bool all_parts) const
   {