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

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into  mysql.com:/home/kostja/mysql/mysql-5.1-merge
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konstantin@mysql.com
2006-02-08 23:53:45 +03:00
parent ea22f9eaa6 5678bc526e
commit 5ed755d0d8
19 changed files with 275 additions and 26 deletions
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17
sql/sql_update.cc
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@ -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;