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enhance plan expiration, optimize index prune for small row count

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This commit is contained in:
zs0
2021-11-11 19:49:35 +08:00
committed by LINxiansheng
parent f2f2aed95c
commit c84b7de59c
17 changed files with 488 additions and 259 deletions
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40
src/sql/engine/table/ob_table_scan_op.cpp
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@ -219,6 +219,7 @@ ObTableScanSpec::ObTableScanSpec(ObIAllocator& alloc, const ObPhyOperatorType ty
est_records_(alloc),
available_index_name_(alloc),
pruned_index_name_(alloc),
unstable_index_name_(alloc),
gi_above_(false),
expected_part_id_(NULL),
need_scn_(false),
@ -294,7 +295,20 @@ int ObTableScanSpec::set_available_index_name(const ObIArray<ObString>& idx_name
return ret;
}
int ObTableScanSpec::set_pruned_index_name(const ObIArray<ObString>& idx_name, ObIAllocator& phy_alloc)
int ObTableScanSpec::set_unstable_index_name(const ObIArray<ObString> &idx_name, ObIAllocator &phy_alloc)
{
int ret = OB_SUCCESS;
OZ(unstable_index_name_.init(idx_name.count()));
FOREACH_CNT_X(n, idx_name, OB_SUCC(ret))
{
ObString name;
OZ(ob_write_string(phy_alloc, *n, name));
OZ(unstable_index_name_.push_back(name));
}
return ret;
}
int ObTableScanSpec::set_pruned_index_name(const ObIArray<ObString> &idx_name, ObIAllocator &phy_alloc)
{
int ret = OB_SUCCESS;
OZ(pruned_index_name_.init(idx_name.count()));
@ -373,6 +387,30 @@ int ObTableScanSpec::explain_index_selection_info(char* buf, int64_t buf_len, in
}
}
if (OB_SUCC(ret) && unstable_index_name_.count() > 0) {
if (OB_FAIL(BUF_PRINTF(", unstable_index_name["))) {
LOG_WARN("BUF_PRINTF fails", K(ret));
}
for (int64_t i = 0; OB_SUCC(ret) && i < unstable_index_name_.count(); ++i) {
if (OB_FAIL(BUF_PRINTF("%.*s", unstable_index_name_.at(i).length(), unstable_index_name_.at(i).ptr()))) {
LOG_WARN("BUF_PRINTF fails", K(ret));
} else if (i != unstable_index_name_.count() - 1) {
if (OB_FAIL(BUF_PRINTF(","))) {
LOG_WARN("BUF_PRINTF fails", K(ret));
} else { /* do nothing*/
}
} else { /* do nothing*/
}
}
if (OB_SUCC(ret)) {
if (OB_FAIL(BUF_PRINTF("]"))) {
LOG_WARN("BUF_PRINTF fails", K(ret));
} else { /* Do nothing */
}
} else { /* Do nothing */
}
}
if (OB_SUCC(ret) && est_records_.count() > 0) {
// print est row count infos
if (OB_FAIL(BUF_PRINTF(", estimation info[table_id:%ld,", est_records_.at(0).table_id_))) {