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Removed dead code that was made obsolete by the introduction of

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check_join_cache_usage() by the change:

Revno: 2793
Revision Id: igor@askmonty.org-20091221022615-kx5ieiu0okmiupuc
Timestamp: Sun 2009-12-20 18:26:15 -0800

Backport into MariaDB-5.2 the following:
WL#2771 "Block Nested Loop Join and Batched Key Access Join"
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2010-07-23 11:25:00 +03:00
parent 2d78ffb8d5
commit e75fd9311b
1 changed files with 0 additions and 16 deletions
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16
sql/sql_select.cc
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@ -7560,7 +7560,6 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after)
{
uint i;
bool statistics= test(!(join->select_options & SELECT_DESCRIBE));
bool ordered_set= 0;
bool sorted= 1;
uint first_sjm_table= MAX_TABLES;
uint last_sjm_table= MAX_TABLES;
@ -7580,21 +7579,6 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after)
tab->read_record.file=table->file;
tab->read_record.unlock_row= rr_unlock_row;
tab->next_select=sub_select; /* normal select */
/*
Determine if the set is already ordered for ORDER BY, so it can
disable join cache because it will change the ordering of the results.
Code handles sort table that is at any location (not only first after
the const tables) despite the fact that it's currently prohibited.
We must disable join cache if the first non-const table alone is
ordered. If there is a temp table the ordering is done as a last
operation and doesn't prevent join cache usage.
*/
if (!ordered_set && !join->need_tmp &&
(table == join->sort_by_table ||
(join->sort_by_table == (TABLE *) 1 && i != join->const_tables)))
ordered_set= 1;
tab->sorted= sorted;
sorted= 0; // only first must be sorted
if (tab->loosescan_match_tab)