hcq/oceanbase
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

patch 4.0

Browse Source
This commit is contained in:
wangzelin.wzl
2022-10-24 10:34:53 +08:00
parent 4ad6e00ec3
commit 93a1074b0c
10533 changed files with 2588271 additions and 2299373 deletions
Download Patch File Download Diff File Expand all files Collapse all files

516
src/sql/optimizer/ob_log_distinct.cpp
View File

@ -14,164 +14,43 @@
#include "sql/optimizer/ob_log_distinct.h"
#include "sql/optimizer/ob_log_exchange.h"
#include "sql/optimizer/ob_log_sort.h"
#include "sql/optimizer/ob_log_set.h"
#include "sql/optimizer/ob_log_operator_factory.h"
#include "sql/optimizer/ob_join_order.h"
#include "sql/optimizer/ob_log_operator_factory.h"
#include "ob_opt_est_cost.h"
#include "ob_select_log_plan.h"
#include "ob_optimizer_util.h"
#include "ob_opt_selectivity.h"
#include "common/ob_smart_call.h"
using namespace oceanbase;
using namespace sql;
using namespace oceanbase::common;
namespace oceanbase {
namespace sql {
namespace oceanbase
{
namespace sql
{
const char* ObLogDistinct::get_name() const
const char *ObLogDistinct::get_name() const
{
return MERGE_AGGREGATE == algo_ ? "MERGE DISTINCT" : "HASH DISTINCT";
}
int ObLogDistinct::copy_without_child(ObLogicalOperator*& out)
{
int ret = OB_SUCCESS;
ObLogicalOperator* op = NULL;
ObLogDistinct* distinct = NULL;
if (OB_FAIL(clone(op))) {
SQL_OPT_LOG(WARN, "failed to clone ObLogDistinct", K(ret));
} else if (OB_ISNULL(distinct = static_cast<ObLogDistinct*>(op))) {
ret = OB_ERR_UNEXPECTED;
SQL_OPT_LOG(WARN, "failed to cast ObLogicalOperator * to ObLogDistinct *", K(ret));
} else if (OB_FAIL(distinct->set_distinct_exprs(distinct_exprs_))) {
LOG_WARN("Failed to set distinct exprs", K(ret));
} else {
distinct->set_algo_type(algo_);
out = distinct;
}
return ret;
}
int ObLogDistinct::push_down_distinct(
AllocExchContext* ctx, ObIArray<OrderItem>& sort_keys, ObLogicalOperator*& exchange_point)
{
// distinct distinct
// | |
// (sort) => (sort)
// | |
// other distinct(child)
// |
// (sort(child))
// |
// other
int ret = OB_SUCCESS;
bool need_sort = false;
bool can_push_distinct = false;
ObLogicalOperator* child = NULL;
ObLogicalOperator* child_sort = NULL;
ObLogicalOperator* child_distinct = NULL;
exchange_point = NULL;
if (OB_ISNULL(child = get_child(first_child))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(child), K(ctx));
} else if (MERGE_AGGREGATE == get_algo() && log_op_def::LOG_SORT == child->get_type()) {
need_sort = true;
exchange_point = child;
} else {
exchange_point = this;
}
// push down distinct
if (OB_FAIL(ret)) {
/*do nothing*/
} else if (OB_FAIL(check_fulfill_cut_ratio_condition(ctx->parallel_, get_card(), can_push_distinct))) {
LOG_WARN("failed to check fulfill cut ratio condition", K(ret));
} else if (!can_push_distinct) {
/*do nothing*/
} else if (need_sort && OB_FAIL(exchange_point->allocate_sort_below(0, sort_keys))) {
LOG_WARN("failed to allocate child sort", K(ret));
} else if (OB_FAIL(exchange_point->allocate_distinct_below(first_child, distinct_exprs_, get_algo()))) {
LOG_WARN("failed to allocate child distinct", K(ret));
} else if (OB_ISNULL(child_distinct = exchange_point->get_child(first_child)) ||
OB_ISNULL(child = child_distinct->get_child(first_child))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(child_distinct), K(child), K(ret));
} else if (OB_FAIL(child_distinct->set_expected_ordering(get_expected_ordering()))) {
LOG_WARN("failed to set expected ordering", K(ret));
} else if (OB_FAIL(child_distinct->replace_generated_agg_expr(ctx->group_push_down_replaced_exprs_))) {
LOG_WARN("failed to replace agg expr", K(ret));
} else if (OB_FAIL(child_distinct->get_sharding_info().copy_with_part_keys(child->get_sharding_info()))) {
LOG_WARN("failed to copy sharding info", K(ret));
} else {
child_distinct->set_card(get_card());
child_distinct->set_op_cost(get_op_cost());
child_distinct->set_width(get_width());
if (need_sort || HASH_AGGREGATE == get_algo() || log_op_def::LOG_TABLE_SCAN != child->get_type()) {
/*do nothing*/
} else {
child_distinct->set_is_partition_wise(true);
child_distinct->set_is_block_gi_allowed(true);
}
}
return ret;
}
int ObLogDistinct::allocate_exchange_post(AllocExchContext* ctx)
{
int ret = OB_SUCCESS;
bool is_basic = false;
bool sharding_compatible = false;
ObLogicalOperator* child = NULL;
ObLogicalOperator* exchange_point = NULL;
ObArray<OrderItem> order_keys;
ObSEArray<ObRawExpr*, 4> key_exprs;
if (OB_ISNULL(ctx) || OB_ISNULL(child = get_child(first_child)) || OB_ISNULL(get_plan())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(ctx), K(child), K(get_plan()), K(ret));
} else if (OB_FAIL(compute_basic_sharding_info(ctx, is_basic))) {
LOG_WARN("failed to compute basic sharding info", K(ret));
} else if (is_basic) {
LOG_TRACE("is basic sharding info", K(sharding_info_));
} else if (OB_FAIL(prune_weak_part_exprs(*ctx, get_distinct_exprs(), key_exprs))) {
LOG_WARN("failed to prune weak part exprs", K(ret));
} else if (OB_FAIL(check_sharding_compatible_with_reduce_expr(child->get_sharding_info(),
key_exprs,
child->get_sharding_output_equal_sets(),
sharding_compatible))) {
LOG_WARN("Failed to check sharding compatible with reduce expr", K(ret), K(*child));
} else if (sharding_compatible) {
if (OB_FAIL(sharding_info_.copy_with_part_keys(child->get_sharding_info()))) {
LOG_WARN("failed to copy sharding info", K(ret));
} else {
is_partition_wise_ = (NULL != sharding_info_.get_phy_table_location_info());
}
} else if (OB_FAIL(make_order_keys(get_distinct_exprs(), order_keys))) {
LOG_WARN("failed to make order items", K(ret));
} else if (OB_FAIL(push_down_distinct(ctx, order_keys, exchange_point))) {
LOG_WARN("failed to push down distinct", K(ret));
} else if (OB_ISNULL(exchange_point)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(ret));
} else if (OB_FAIL(exchange_point->allocate_grouping_style_exchange_below(ctx, distinct_exprs_))) {
LOG_WARN("failed to allocate grouping style exchange", K(ret));
} else if (OB_FAIL(sharding_info_.copy_with_part_keys(exchange_point->get_sharding_info()))) {
LOG_WARN("failed to copy sharding info", K(ret));
} else { /*do nothing*/
}
return ret;
}
int ObLogDistinct::print_my_plan_annotation(char* buf, int64_t& buf_len, int64_t& pos, ExplainType type)
int ObLogDistinct::print_my_plan_annotation(char *buf,
int64_t &buf_len,
int64_t &pos,
ExplainType type)
{
int ret = OB_SUCCESS;
// print access
if (OB_FAIL(BUF_PRINTF(", "))) {
LOG_WARN("BUF_PRINTF fails", K(ret));
LOG_WARN("BUF_PRINTF fails",K(ret));
} else if (OB_FAIL(BUF_PRINTF("\n "))) {
LOG_WARN("BUF_PRINTF fails", K(ret));
} else { /* Do nothing */
}
const ObIArray<ObRawExpr*>& distinct = distinct_exprs_;
LOG_WARN("BUF_PRINTF fails",K(ret));
} else { /* Do nothing */ }
const ObIArray<ObRawExpr*> &distinct = distinct_exprs_;
EXPLAIN_PRINT_EXPRS(distinct, type);
if (OB_SUCC(ret) && is_block_mode_) {
ret = BUF_PRINTF(", block");
@ -179,39 +58,13 @@ int ObLogDistinct::print_my_plan_annotation(char* buf, int64_t& buf_len, int64_t
return ret;
}
int ObLogDistinct::inner_replace_generated_agg_expr(
const ObIArray<std::pair<ObRawExpr*, ObRawExpr*> >& to_replace_exprs)
{
int ret = OB_SUCCESS;
if (OB_FAIL(replace_exprs_action(to_replace_exprs, distinct_exprs_))) {
SQL_OPT_LOG(WARN, "failed to replace agg exprs in distinct op", K(ret));
}
return ret;
}
int ObLogDistinct::transmit_op_ordering()
int ObLogDistinct::inner_replace_generated_agg_expr(
const ObIArray<std::pair<ObRawExpr *, ObRawExpr*> >&to_replace_exprs)
{
int ret = OB_SUCCESS;
bool need_sort = false;
reset_op_ordering();
reset_local_ordering();
if (HASH_AGGREGATE == get_algo()) {
/*do nothing*/
} else {
ObLogicalOperator* child = get_child(first_child);
bool need_sort = false;
if (OB_FAIL(check_need_sort_for_grouping_op(0, expected_ordering_, need_sort))) {
LOG_WARN("failed to check need sort", K(ret));
} else if (need_sort) { // need alloc sort
if (OB_FAIL(allocate_sort_below(0, expected_ordering_))) {
LOG_WARN("failed to allocate implicit sort", K(ret));
} else if (OB_FAIL(set_op_ordering(expected_ordering_))) {
LOG_WARN("failed to set op ordering", K(ret));
}
} else if (OB_FAIL(set_op_ordering(child->get_op_ordering()))) {
LOG_WARN("failed to set op's ordering", K(ret));
} else { /*do nothing*/
}
if(OB_FAIL(replace_exprs_action(to_replace_exprs, distinct_exprs_))) {
SQL_OPT_LOG(WARN, "failed to replace agg exprs in distinct op", K(ret));
}
return ret;
}
@ -219,74 +72,161 @@ int ObLogDistinct::transmit_op_ordering()
int ObLogDistinct::compute_op_ordering()
{
int ret = OB_SUCCESS;
ObLogicalOperator* child = NULL;
ObLogicalOperator *child = NULL;
if (algo_ == HASH_AGGREGATE) {
// do nothing
reset_op_ordering();
} else if (OB_ISNULL(child = get_child(ObLogicalOperator::first_child))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("child is null", K(ret));
} else if (OB_FAIL(set_op_ordering(child->get_op_ordering()))) {
LOG_WARN("failed to set op ordering", K(ret));
} else if (OB_FAIL(ObLogicalOperator::compute_op_ordering())) {
LOG_WARN("failed to compute op ordering", K(ret));
} else {
is_local_order_ = is_fully_paratition_wise() && !get_op_ordering().empty();
}
return ret;
}
int ObLogDistinct::est_width()
{
int ret = OB_SUCCESS;
double width = 0.0;
ObSEArray<ObRawExpr*, 16> output_exprs;
if (OB_ISNULL(get_plan())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("invalid plan", K(ret));
} else if (OB_FAIL(get_distinct_output_exprs(output_exprs))) {
LOG_WARN("failed to get distinct output exprs", K(ret));
} else if (OB_FAIL(ObOptEstCost::estimate_width_for_exprs(get_plan()->get_basic_table_metas(),
get_plan()->get_selectivity_ctx(),
output_exprs,
width))) {
LOG_WARN("failed to estimate width for output distinct exprs", K(ret));
} else {
set_width(width);
LOG_TRACE("est width for distinct", K(output_exprs), K(width));
}
return ret;
}
int ObLogDistinct::get_distinct_output_exprs(ObIArray<ObRawExpr *> &output_exprs)
{
int ret = OB_SUCCESS;
ObLogPlan *plan = NULL;
ObSEArray<ObRawExpr*, 16> candi_exprs;
ObSEArray<ObRawExpr*, 16> extracted_col_aggr_winfunc_exprs;
if (OB_ISNULL(plan = get_plan())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("invalid input", K(ret));
} else if (OB_FAIL(append_array_no_dup(candi_exprs, plan->get_select_item_exprs_for_width_est()))) {
LOG_WARN("failed to add into output exprs", K(ret));
} else if (OB_FAIL(append_array_no_dup(candi_exprs, plan->get_orderby_exprs_for_width_est()))) {
LOG_WARN("failed to add into output exprs", K(ret));
} else if (OB_FAIL(ObRawExprUtils::extract_col_aggr_winfunc_exprs(candi_exprs,
extracted_col_aggr_winfunc_exprs))) {
} else if (OB_FAIL(append_array_no_dup(output_exprs, extracted_col_aggr_winfunc_exprs))) {
LOG_WARN("failed to add into output exprs", K(ret));
} else {/*do nothing*/}
return ret;
}
int ObLogDistinct::est_cost()
{
int ret = OB_SUCCESS;
ObLogicalOperator* first_child = get_child(ObLogicalOperator::first_child);
double distinct_card = 0.0;
double distinct_cost = 0.0;
if (OB_ISNULL(first_child) || OB_ISNULL(get_est_sel_info())) {
ObLogicalOperator *child = NULL;
if (OB_ISNULL(child = get_child(ObLogicalOperator::first_child))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("params have null", K(ret));
} else if (OB_FAIL(ObOptEstSel::calculate_distinct(
first_child->get_card(), *get_est_sel_info(), distinct_exprs_, distinct_card))) {
LOG_WARN("failed to calculate distinct", K(ret));
} else if (MERGE_AGGREGATE == algo_) {
distinct_cost = ObOptEstCost::cost_merge_distinct(first_child->get_card(), distinct_card, distinct_exprs_);
LOG_WARN("get unexpected null", K(child), K(ret));
} else if (OB_UNLIKELY(total_ndv_ < 0)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected total ndv", K(total_ndv_), K(ret));
} else if (OB_FAIL(inner_est_cost(child->get_card(), total_ndv_, distinct_cost))) {
LOG_WARN("failed to est distinct cost", K(ret));
} else {
distinct_cost = ObOptEstCost::cost_hash_distinct(first_child->get_card(), distinct_card, distinct_exprs_);
}
if (OB_SUCC(ret)) {
set_card(distinct_card);
set_cost(first_child->get_cost() + distinct_cost);
set_op_cost(distinct_cost);
set_width(first_child->get_width());
set_cost(child->get_cost() + distinct_cost);
set_card(total_ndv_);
}
return ret;
}
int ObLogDistinct::re_est_cost(const ObLogicalOperator* parent, double need_row_count, bool& re_est)
int ObLogDistinct::re_est_cost(EstimateCostInfo &param, double &card, double &cost)
{
int ret = OB_SUCCESS;
UNUSED(parent);
re_est = false;
ObLogicalOperator* child = NULL;
if (need_row_count >= get_card()) {
/* do nothing */
} else if (OB_ISNULL(child = get_child(first_child))) {
double distinct_cost = 0.0;
ObLogicalOperator *child = NULL;
if (OB_ISNULL(child = get_child(ObLogicalOperator::first_child))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("child is NULL", K(ret), K(child));
} else if (OB_FAIL(child->re_est_cost(this, child->get_card() * need_row_count / get_card(), re_est))) {
LOG_WARN("re-estimate cost of child failed", K(ret));
LOG_WARN("unexpect null child", K(ret));
} else if (OB_UNLIKELY(total_ndv_ < 0)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected total ndv", K(total_ndv_), K(ret));
} else {
double distinct_cost = op_cost_;
if (MERGE_AGGREGATE == algo_) {
distinct_cost = ObOptEstCost::cost_merge_distinct(child->get_card(), need_row_count, distinct_exprs_);
} else if (HASH_AGGREGATE == algo_) {
distinct_cost = ObOptEstCost::cost_hash_distinct(child->get_card(), need_row_count, distinct_exprs_);
} else {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("unrecognized algorithm detected which is unexpected", K(ret), K(algo_));
double child_card = child->get_card();
double child_cost = child->get_cost();
double child_ndv = total_ndv_;
if (param.need_row_count_ >= 0 &&
child_card > 0 &&
total_ndv_ > 0 &&
param.need_row_count_ < child_card &&
param.need_row_count_ < total_ndv_) {
child_ndv = param.need_row_count_;
param.need_row_count_ = child_card * (1 - std::pow((1 - child_ndv / total_ndv_), total_ndv_ / child_card));
}
if (OB_SUCC(ret)) {
card_ = need_row_count;
op_cost_ = distinct_cost;
cost_ = (child->get_cost() + distinct_cost);
re_est = true;
if (OB_FAIL(SMART_CALL(child->re_est_cost(param, child_card, child_cost)))) {
LOG_WARN("failed to re est child cost", K(ret));
} else if (OB_FAIL(inner_est_cost(child_card, child_ndv, distinct_cost))) {
LOG_WARN("failed to est distinct cost", K(ret));
} else {
cost = child_cost + distinct_cost;
card = child_ndv;
if (param.override_) {
set_op_cost(distinct_cost);
set_cost(cost);
set_card(card);
total_ndv_ = child_ndv;
}
}
}
return ret;
}
int ObLogDistinct::inner_est_cost(double child_card, double child_ndv, double &op_cost)
{
int ret = OB_SUCCESS;
int64_t parallel = get_parallel();
double per_dop_card = 0.0;
double per_dop_ndv = 0.0;
ObLogicalOperator *child = NULL;
if (OB_ISNULL(get_plan()) ||
OB_ISNULL(child = get_child(ObLogicalOperator::first_child))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(child), K(ret));
} else if (OB_UNLIKELY(parallel < 1)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected parallel", K(parallel), K(ret));
} else {
ObOptimizerContext &opt_ctx = get_plan()->get_optimizer_context();
per_dop_card = child_card / parallel;
if (parallel > 1) {
if (is_push_down()) {
per_dop_ndv = ObOptSelectivity::scale_distinct(per_dop_card, child_card, child_ndv);
} else {
per_dop_ndv = child_ndv / parallel;
}
} else {
per_dop_ndv = child_ndv;
}
if (MERGE_AGGREGATE == algo_) {
op_cost = ObOptEstCost::cost_merge_distinct(per_dop_card,
per_dop_ndv,
child->get_width(),
distinct_exprs_,
opt_ctx.get_cost_model_type());
} else {
op_cost = ObOptEstCost::cost_hash_distinct(per_dop_card,
per_dop_ndv,
child->get_width(),
distinct_exprs_,
opt_ctx.get_cost_model_type());
}
}
return ret;
@ -294,7 +234,6 @@ int ObLogDistinct::re_est_cost(const ObLogicalOperator* parent, double need_row_
uint64_t ObLogDistinct::hash(uint64_t seed) const
{
seed = ObOptimizerUtil::hash_exprs(seed, distinct_exprs_);
seed = do_hash(algo_, seed);
seed = ObLogicalOperator::hash(seed);
@ -304,18 +243,22 @@ uint64_t ObLogDistinct::hash(uint64_t seed) const
int ObLogDistinct::compute_fd_item_set()
{
int ret = OB_SUCCESS;
const ObLogicalOperator* child = NULL;
ObFdItemSet* fd_item_set = NULL;
ObTableFdItem* fd_item = NULL;
if (OB_ISNULL(child = get_child(ObLogicalOperator::first_child)) || OB_ISNULL(my_plan_) || OB_ISNULL(get_stmt())) {
const ObLogicalOperator *child = NULL;
ObFdItemSet *fd_item_set = NULL;
ObTableFdItem *fd_item = NULL;
if (OB_ISNULL(child = get_child(ObLogicalOperator::first_child)) ||
OB_ISNULL(my_plan_) || OB_ISNULL(get_stmt())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpect null", K(ret), K(child), K(my_plan_), K(get_stmt()));
} else if (OB_FAIL(my_plan_->get_fd_item_factory().create_fd_item_set(fd_item_set))) {
LOG_WARN("failed to create fd item set", K(ret));
} else if (OB_FAIL(fd_item_set->assign(child->get_fd_item_set()))) {
LOG_WARN("failed to assign fd item set", K(ret));
} else if (OB_FAIL(my_plan_->get_fd_item_factory().create_table_fd_item(
fd_item, true, distinct_exprs_, get_stmt()->get_current_level(), get_table_set()))) {
} else if (OB_FAIL(my_plan_->get_fd_item_factory().create_table_fd_item(fd_item,
true,
distinct_exprs_,
get_stmt()->get_current_level(),
get_table_set()))) {
LOG_WARN("failed to create fd item", K(ret));
} else if (OB_FAIL(fd_item_set->push_back(fd_item))) {
LOG_WARN("failed to push back fd item", K(ret));
@ -327,64 +270,125 @@ int ObLogDistinct::compute_fd_item_set()
return ret;
}
int ObLogDistinct::allocate_granule_pre(AllocGIContext& ctx)
int ObLogDistinct::allocate_granule_pre(AllocGIContext &ctx)
{
return pw_allocate_granule_pre(ctx);
int ret = OB_SUCCESS;
if (OB_FAIL(pw_allocate_granule_pre(ctx))) {
LOG_WARN("failed to allocate partition wise granule", K(ret));
} else { /*do nothing*/ }
return ret;
}
int ObLogDistinct::allocate_granule_post(AllocGIContext& ctx)
int ObLogDistinct::allocate_granule_post(AllocGIContext &ctx)
{
return pw_allocate_granule_post(ctx);
}
int ObLogDistinct::allocate_expr_pre(ObAllocExprContext& ctx)
int ObLogDistinct::get_op_exprs(ObIArray<ObRawExpr*> &all_exprs)
{
int ret = OB_SUCCESS;
uint64_t producer_id = OB_INVALID_ID;
if (OB_FAIL(get_next_producer_id(get_child(first_child), producer_id))) {
LOG_WARN("failed to get next producer id", K(ret));
} else if (OB_FAIL(add_exprs_to_ctx(ctx, distinct_exprs_, producer_id))) {
if (OB_FAIL(append(all_exprs, distinct_exprs_))) {
LOG_WARN("failed to add exprs to ctx", K(ret));
} else if (OB_FAIL(ObLogicalOperator::allocate_expr_pre(ctx))) {
LOG_WARN("failed to allocate parent expr pre", K(ret));
} else { /*do nothing*/
}
} else if (OB_FAIL(ObLogicalOperator::get_op_exprs(all_exprs))) {
LOG_WARN("failed to get op exprs", K(ret));
} else { /*do nothing*/ }
return ret;
}
int ObLogDistinct::generate_link_sql_pre(GenLinkStmtContext& link_ctx)
int ObLogDistinct::generate_link_sql_post(GenLinkStmtPostContext &link_ctx)
{
int ret = OB_SUCCESS;
ObLinkStmt* link_stmt = link_ctx.link_stmt_;
if (OB_ISNULL(link_stmt) || !link_stmt->is_inited()) {
// do nothing.
} else if (dblink_id_ != link_ctx.dblink_id_) {
link_ctx.dblink_id_ = OB_INVALID_ID;
link_ctx.link_stmt_ = NULL;
} else if (OB_FAIL(link_stmt->try_fill_select_strs(output_exprs_))) {
LOG_WARN("failed to fill link stmt select strs", K(ret), K(output_exprs_));
} else if (OB_FAIL(link_stmt->set_select_distinct())) {
LOG_WARN("failed to set link stmt select distinct", K(ret));
if (0 == dblink_id_) {
// do nothing
} else if (OB_FAIL(link_ctx.spell_distinct(startup_exprs_, filter_exprs_))) {
LOG_WARN("dblink fail to reverse spell distinct", K(dblink_id_), K(ret));
}
return ret;
}
int ObLogDistinct::check_output_dep_specific(ObRawExprCheckDep &checker)
int ObLogDistinct::print_outline(planText &plan_text)
{
int ret = OB_SUCCESS;
// distinct exprs
for (int64_t i = 0; OB_SUCC(ret) && i < distinct_exprs_.count(); ++i) {
if (OB_ISNULL(distinct_exprs_.at(i))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("distinct_exprs_.at(i) is null", K(ret), K(i));
} else if (OB_FAIL(checker.check(*distinct_exprs_.at(i)))) {
LOG_WARN("failed to check distinct_exprs_.at(i)", K(ret), K(i));
} else {
if (is_push_down()) {
/* print outline in top distinct */
} else if (USED_HINT == plan_text.outline_type_ && OB_FAIL(print_used_hint(plan_text))) {
LOG_WARN("fail to print used hint", K(ret));
} else if (OUTLINE_DATA == plan_text.outline_type_ && OB_FAIL(print_outline_data(plan_text))) {
LOG_WARN("fail to print outline data", K(ret));
}
return ret;
}
int ObLogDistinct::print_used_hint(planText &plan_text)
{
int ret = OB_SUCCESS;
if (OB_ISNULL(get_plan())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("unexpected NULL", K(ret), K(get_plan()));
} else {
const ObHint *use_hash = get_plan()->get_log_plan_hint().get_normal_hint(T_USE_HASH_DISTINCT);
const ObHint *pushdown = get_plan()->get_log_plan_hint().get_normal_hint(T_DISTINCT_PUSHDOWN);
if (NULL != use_hash) {
bool match_hint = (HASH_AGGREGATE == algo_ && use_hash->is_enable_hint())
|| (MERGE_AGGREGATE == algo_ && use_hash->is_disable_hint());
if (match_hint && OB_FAIL(use_hash->print_hint(plan_text))) {
LOG_WARN("failed to print used hint for group by", K(ret), K(*use_hash));
}
}
if (OB_SUCC(ret) && NULL != pushdown) {
const ObLogicalOperator *child = NULL;
const ObLogicalOperator *op = NULL;
if (OB_ISNULL(child = get_child(ObLogicalOperator::first_child))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("unexpected NULL", K(ret), K(child));
} else if (OB_FAIL(child->get_pushdown_op(log_op_def::LOG_DISTINCT, op))) {
LOG_WARN("failed to get push down distinct", K(ret));
} else {
bool match_hint = NULL == op ? pushdown->is_disable_hint()
: pushdown->is_enable_hint();
if (match_hint && OB_FAIL(pushdown->print_hint(plan_text))) {
LOG_WARN("failed to print used hint for group by", K(ret), K(*pushdown));
}
}
}
}
return ret;
}
} // namespace sql
} // namespace oceanbase
int ObLogDistinct::print_outline_data(planText &plan_text)
{
int ret = OB_SUCCESS;
char *buf = plan_text.buf;
int64_t &buf_len = plan_text.buf_len;
int64_t &pos = plan_text.pos;
const ObDMLStmt *stmt = NULL;
ObString qb_name;
const ObLogicalOperator *child = NULL;
const ObLogicalOperator *op = NULL;
if (OB_ISNULL(get_plan()) || OB_ISNULL(stmt = get_plan()->get_stmt())
|| OB_ISNULL(child = get_child(ObLogicalOperator::first_child))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("unexpected NULL", K(ret), K(get_plan()), K(stmt), K(child));
} else if (OB_FAIL(child->get_pushdown_op(log_op_def::LOG_DISTINCT, op))) {
LOG_WARN("failed to get push down distinct", K(ret));
} else if (OB_FAIL(stmt->get_qb_name(qb_name))) {
LOG_WARN("fail to get qb_name", K(ret), K(stmt->get_stmt_id()));
} else if (NULL != op &&
OB_FAIL(BUF_PRINTF("%s%s(@\"%.*s\")",
ObQueryHint::get_outline_indent(plan_text.is_oneline_),
ObHint::get_hint_name(T_DISTINCT_PUSHDOWN),
qb_name.length(), qb_name.ptr()))) {
LOG_WARN("fail to print buffer", K(ret), K(buf), K(buf_len), K(pos));
} else if (HASH_AGGREGATE == algo_ &&
OB_FAIL(BUF_PRINTF("%s%s(@\"%.*s\")",
ObQueryHint::get_outline_indent(plan_text.is_oneline_),
ObHint::get_hint_name(T_USE_HASH_DISTINCT),
qb_name.length(), qb_name.ptr()))) {
LOG_WARN("fail to print buffer", K(ret), K(buf), K(buf_len), K(pos));
} else {/*do nothing*/}
return ret;
}
}
}