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Merge 5.5 into 10.1

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This commit is contained in:
Marko Mäkelä
2020-04-14 15:43:12 +03:00
parent 0b7a79c6b0 c1394ab6b5
commit 26f0cd8afc
5 changed files with 67 additions and 7 deletions
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16
sql/opt_range.cc
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@ -359,7 +359,8 @@ QUICK_RANGE_SELECT *get_quick_select(PARAM *param,uint index,
static TRP_RANGE *get_key_scans_params(PARAM *param, SEL_TREE *tree,
bool index_read_must_be_used,
bool update_tbl_stats,
double read_time);
double read_time,
bool ror_scans_required);
static
TRP_INDEX_INTERSECT *get_best_index_intersect(PARAM *param, SEL_TREE *tree,
double read_time);
@ -2598,7 +2599,7 @@ int SQL_SELECT::test_quick_select(THD *thd, key_map keys_to_use,
/* Get best 'range' plan and prepare data for making other plans */
if ((range_trp= get_key_scans_params(&param, tree, FALSE, TRUE,
best_read_time)))
best_read_time, FALSE)))
{
best_trp= range_trp;
best_read_time= best_trp->read_cost;
@ -4721,7 +4722,8 @@ TABLE_READ_PLAN *get_best_disjunct_quick(PARAM *param, SEL_IMERGE *imerge,
{
DBUG_EXECUTE("info", print_sel_tree(param, *ptree, &(*ptree)->keys_map,
"tree in SEL_IMERGE"););
if (!(*cur_child= get_key_scans_params(param, *ptree, TRUE, FALSE, read_time)))
if (!(*cur_child= get_key_scans_params(param, *ptree, TRUE, FALSE,
read_time, TRUE)))
{
/*
One of index scans in this index_merge is more expensive than entire
@ -5043,7 +5045,7 @@ TABLE_READ_PLAN *merge_same_index_scans(PARAM *param, SEL_IMERGE *imerge,
index merge retrievals are not well calibrated
*/
trp= get_key_scans_params(param, *imerge->trees, FALSE, TRUE,
read_time);
read_time, TRUE);
}
DBUG_RETURN(trp);
@ -6771,6 +6773,7 @@ TRP_ROR_INTERSECT *get_best_covering_ror_intersect(PARAM *param,
index_read_must_be_used if TRUE, assume 'index only' option will be set
(except for clustered PK indexes)
read_time don't create read plans with cost > read_time.
ror_scans_required set to TRUE for index merge
RETURN
Best range read plan
NULL if no plan found or error occurred
@ -6779,7 +6782,8 @@ TRP_ROR_INTERSECT *get_best_covering_ror_intersect(PARAM *param,
static TRP_RANGE *get_key_scans_params(PARAM *param, SEL_TREE *tree,
bool index_read_must_be_used,
bool update_tbl_stats,
double read_time)
double read_time,
bool ror_scans_required)
{
uint idx, best_idx;
SEL_ARG *key_to_read= NULL;
@ -6827,7 +6831,7 @@ static TRP_RANGE *get_key_scans_params(PARAM *param, SEL_TREE *tree,
update_tbl_stats, &mrr_flags,
&buf_size, &cost);
if (!param->is_ror_scan &&
if (ror_scans_required && !param->is_ror_scan &&
!optimizer_flag(param->thd, OPTIMIZER_SWITCH_INDEX_MERGE_SORT_UNION))
{
/* The scan is not a ROR-scan, just skip it */