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Fix for Bug #3307 "FLUSH TABLES sometimes breaks prepared statement

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table resolution".
Added members to Item_ident for storing original db, table and field
names since those that set later from Field have shorter life-time 
than required by prep. stmt. So we need to restore original names in 
Item_ident::cleanup(). Also now using special construnctor for creation
of Item_field from Field object that ensures that table and field name 
have big enough life-time.

"Fix" for bug #2050 "10 to 1 performance drop with server 4.1.1"
Clean ups in implementation of caching of field number in table.
Added caching of table in which field is found in find_field_in_tables().
This commit is contained in:
dlenev@brandersnatch.localdomain
2004-03-31 21:25:55 +04:00
parent 9e28b7698d
commit 4122188cc2
5 changed files with 83 additions and 19 deletions
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2
sql/sql_acl.cc
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@@ -2194,7 +2194,7 @@ int mysql_table_grant(THD *thd, TABLE_LIST *table_list,
DBUG_RETURN(-1);
while ((column = column_iter++))
{
int unused_field_idx= -1;
uint unused_field_idx= NO_CACHED_FIELD_INDEX;
if (!find_field_in_table(thd,table,column->column.ptr(),
column->column.length(),0,0,
&unused_field_idx))