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BUG#5390 - problems with merge tables

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Problem #1: INSERT...SELECT, Version for 4.1.
INSERT ... SELECT with the same table on both sides (hidden
below a MERGE table) does now work by buffering the select result.
The duplicate detection works now after open_and_lock_tables() 
on the locks.
I did not find a test case that failed without the change in
sql_update.cc. I made the change anyway as it should in theory
fix a possible MERGE table problem with multi-table update.
This commit is contained in:
ingo@mysql.com
2005-12-07 19:52:26 +01:00
parent 7ce92291f0
commit 5aa315e23a
8 changed files with 169 additions and 32 deletions
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3
sql/sql_update.cc
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@ -854,8 +854,7 @@ int multi_update::prepare(List<Item> &not_used_values,
{
TABLE *table=table_ref->table;
if (!(tables_to_update & table->map) &&
find_real_table_in_list(update_tables, table_ref->db,
table_ref->real_name))
mysql_lock_have_duplicate(thd, table, update_tables))
table->no_cache= 1; // Disable row cache
}
DBUG_RETURN(thd->is_fatal_error != 0);