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MDEV-11953: support of brackets in UNION/EXCEPT/INTERSECT operations

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This commit is contained in:
Oleksandr Byelkin
2018-05-22 19:08:39 +02:00
parent 1b981b9edb
commit de745ecf29
298 changed files with 36118 additions and 3473 deletions
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2
sql/opt_range.cc
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@ -4543,7 +4543,7 @@ double get_sweep_read_cost(const PARAM *param, ha_rows records)
if (max_cost != DBL_MAX && (busy_blocks+index_reads_cost) >= n_blocks)
return 1;
*/
JOIN *join= param->thd->lex->select_lex.join;
JOIN *join= param->thd->lex->first_select_lex()->join;
if (!join || join->table_count == 1)
{
/* No join, assume reading is done in one 'sweep' */