Merge mysql.com:/home/kostja/mysql/tmp_merge

into  mysql.com:/home/kostja/mysql/mysql-5.1-merge


configure.in:
  Auto merged
include/heap.h:
  Auto merged
libmysql/libmysql.c:
  Auto merged
mysql-test/r/date_formats.result:
  Auto merged
mysql-test/t/date_formats.test:
  Auto merged
sql/ha_heap.cc:
  Auto merged
sql/ha_heap.h:
  Auto merged
sql/item_timefunc.cc:
  Auto merged
sql/sql_base.cc:
  Auto merged
sql/sql_class.cc:
  Auto merged
sql/sql_parse.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/sql_select.h:
  Auto merged
storage/heap/hp_create.c:
  Auto merged
storage/ndb/include/mgmapi/mgmapi_config_parameters.h:
  Auto merged
storage/ndb/test/ndbapi/testBlobs.cpp:
  Auto merged
sql/sql_update.cc:
  Manual merge
tests/mysql_client_test.c:
  SCCS merged

1 files changed, 15 insertions, 2 deletions

diff --git a/sql/sql_update.cc b/sql/sql_update.cc
index d6bf01f5a25..b1abf2c0777 100644
--- a/sql/sql_update.cc
+++ b/sql/sql_update.cc
@@ -331,7 +331,6 @@ int mysql_update(THD *thd,
       SORT_FIELD  *sortorder;
       ha_rows examined_rows;
 
-      used_index= MAX_KEY;                   // For call to init_read_record()
       table->sort.io_cache = (IO_CACHE *) my_malloc(sizeof(IO_CACHE),
 						    MYF(MY_FAE | MY_ZEROFILL));
       if (!(sortorder=make_unireg_sortorder(order, &length)) ||
@@ -362,7 +361,21 @@ int mysql_update(THD *thd,
       if (open_cached_file(&tempfile, mysql_tmpdir,TEMP_PREFIX,
 			   DISK_BUFFER_SIZE, MYF(MY_WME)))
 	goto err;
-      
+
+      /* If quick select is used, initialize it before retrieving rows. */
+      if (select && select->quick && select->quick->reset())
+        goto err;
+
+      /*
+        When we get here, we have one of the following options:
+        A. used_index == MAX_KEY
+           This means we should use full table scan, and start it with
+           init_read_record call
+        B. used_index != MAX_KEY
+           B.1 quick select is used, start the scan with init_read_record
+           B.2 quick select is not used, this is full index scan (with LIMIT)
+               Full index scan must be started with init_read_record_idx
+      */
       /* If quick select is used, initialize it before retrieving rows. */
       if (select && select->quick && select->quick->reset())
         goto err;