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WL#2985 "Partition pruning": addition2: perform partition pruning for

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single-table UPDATE/DELETE.
This commit is contained in:
sergefp@mysql.com
2006-01-26 20:17:17 +03:00
parent dbc75b0e27
commit c53b5a0b9f
4 changed files with 115 additions and 2 deletions
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17
sql/sql_delete.cc
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@ -100,6 +100,21 @@ bool mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds,
/* Handler didn't support fast delete; Delete rows one by one */
}
#ifdef WITH_PARTITION_STORAGE_ENGINE
if (prune_partitions(thd, table, conds))
{
free_underlaid_joins(thd, select_lex);
thd->row_count_func= 0;
send_ok(thd); // No matching records
DBUG_RETURN(0);
}
/*
Update the table->records number (note: we probably could remove the
previous file->info() call)
*/
table->file->info(HA_STATUS_VARIABLE | HA_STATUS_NO_LOCK);
#endif
table->used_keys.clear_all();
table->quick_keys.clear_all(); // Can't use 'only index'
select=make_select(table, 0, 0, conds, 0, &error);
@ -111,13 +126,11 @@ bool mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds,
free_underlaid_joins(thd, select_lex);
thd->row_count_func= 0;
send_ok(thd,0L);
/*
We don't need to call reset_auto_increment in this case, because
mysql_truncate always gives a NULL conds argument, hence we never
get here.
*/
DBUG_RETURN(0); // Nothing to delete
}