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fix column table scan cost bug

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This commit is contained in:
zzg19950727
2024-07-09 12:10:50 +00:00
committed by ob-robot
parent a60aed35b7
commit 496cb407d9
1 changed files with 6 additions and 1 deletions
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7
src/sql/optimizer/ob_opt_est_cost_model.cpp
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@ -1391,7 +1391,7 @@ int ObOptEstCostModel::cost_basic_table(const ObCostTableScanInfo &est_cost_info
double row_count_per_part = row_count / part_count; double row_count_per_part = row_count / part_count;
double index_scan_cost = 0; double index_scan_cost = 0;
double index_back_cost = 0; double index_back_cost = 0;
double prefix_filter_sel = est_cost_info.join_filter_sel_; double prefix_filter_sel = 1.0;
// calc scan one partition cost // calc scan one partition cost
if (OB_FAIL(cost_index_scan(est_cost_info, if (OB_FAIL(cost_index_scan(est_cost_info,
row_count_per_part, row_count_per_part,
@ -1466,6 +1466,7 @@ int ObOptEstCostModel::cost_column_store_index_scan(const ObCostTableScanInfo &e
double &index_scan_cost) double &index_scan_cost)
{ {
int ret = OB_SUCCESS; int ret = OB_SUCCESS;
double runtime_filter_sel = est_cost_info.join_filter_sel_;
SMART_VAR(ObCostTableScanInfo, column_group_est_cost_info, OB_INVALID_ID, OB_INVALID_ID, OB_INVALID_ID) { SMART_VAR(ObCostTableScanInfo, column_group_est_cost_info, OB_INVALID_ID, OB_INVALID_ID, OB_INVALID_ID) {
if (OB_FAIL(column_group_est_cost_info.assign(est_cost_info))) { if (OB_FAIL(column_group_est_cost_info.assign(est_cost_info))) {
LOG_WARN("failed to assign est cost info", K(ret)); LOG_WARN("failed to assign est cost info", K(ret));
@ -1500,6 +1501,10 @@ int ObOptEstCostModel::cost_column_store_index_scan(const ObCostTableScanInfo &e
index_scan_cost += column_group_cost; index_scan_cost += column_group_cost;
OPT_TRACE_COST_MODEL(KV(index_scan_cost), "+=", KV(column_group_cost)); OPT_TRACE_COST_MODEL(KV(index_scan_cost), "+=", KV(column_group_cost));
prefix_filter_sel *= cg_info.filter_sel_; prefix_filter_sel *= cg_info.filter_sel_;
if (cg_info.filters_.empty() && runtime_filter_sel < 1.0) {
prefix_filter_sel *= runtime_filter_sel;
runtime_filter_sel = 1.0;
}
LOG_TRACE("OPT:[COST ONE COLUMN GROUP]", K(row_count), K(prefix_filter_sel), K(column_group_cost)); LOG_TRACE("OPT:[COST ONE COLUMN GROUP]", K(row_count), K(prefix_filter_sel), K(column_group_cost));
} }
} }