thevar1able/ClickHouse
1
0
Fork 0
mirror of https://github.com/ClickHouse/ClickHouse.git synced 2024-11-21 23:21:59 +00:00
Code Issues Packages Projects Releases Wiki Activity

place left join keys in before_join actions

Browse Source
This commit is contained in:
Artem Zuikov 2020-06-26 02:05:47 +03:00
parent 9637dad462
commit d573005b04
3 changed files with 34 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
src/Interpreters/ExpressionActions.h
View File

@ -340,6 +340,13 @@ struct ExpressionActionsChain
return steps.back();
}
Step & lastStep(const NamesAndTypesList & columns)
{
if (steps.empty())
steps.emplace_back(std::make_shared<ExpressionActions>(columns, context));
return steps.back();
}
std::string dumpChain();
};

62
src/Interpreters/ExpressionAnalyzer.cpp
View File

@ -453,14 +453,6 @@ const ASTSelectQuery * SelectQueryExpressionAnalyzer::getAggregatingQuery() cons
return getSelectQuery();
}
void ExpressionAnalyzer::initChain(ExpressionActionsChain & chain, const NamesAndTypesList & columns) const
{
if (chain.steps.empty())
{
chain.steps.emplace_back(std::make_shared<ExpressionActions>(columns, context));
}
}
/// "Big" ARRAY JOIN.
void ExpressionAnalyzer::addMultipleArrayJoinAction(ExpressionActionsPtr & actions, bool array_join_is_left) const
{
@ -487,8 +479,7 @@ bool SelectQueryExpressionAnalyzer::appendArrayJoin(ExpressionActionsChain & cha
if (!array_join_expression_list)
return false;
initChain(chain, sourceColumns());
ExpressionActionsChain::Step & step = chain.steps.back();
ExpressionActionsChain::Step & step = chain.lastStep(sourceColumns());
getRootActions(array_join_expression_list, only_types, step.actions);
@ -502,14 +493,20 @@ void ExpressionAnalyzer::addJoinAction(ExpressionActionsPtr & actions, JoinPtr j
actions->add(ExpressionAction::ordinaryJoin(syntax->analyzed_join, join));
}
bool SelectQueryExpressionAnalyzer::appendJoin(ExpressionActionsChain & chain, bool only_types)
bool SelectQueryExpressionAnalyzer::appendJoinLeftKeys(ExpressionActionsChain & chain, bool only_types)
{
ExpressionActionsChain::Step & step = chain.lastStep(sourceColumns());
getRootActions(analyzedJoin().leftKeysList(), only_types, step.actions);
return true;
}
bool SelectQueryExpressionAnalyzer::appendJoin(ExpressionActionsChain & chain)
{
JoinPtr table_join = makeTableJoin(*syntax->ast_join);
initChain(chain, sourceColumns());
ExpressionActionsChain::Step & step = chain.steps.back();
ExpressionActionsChain::Step & step = chain.lastStep(sourceColumns());
getRootActions(analyzedJoin().leftKeysList(), only_types, step.actions);
addJoinAction(step.actions, table_join);
return true;
}
@ -633,8 +630,7 @@ bool SelectQueryExpressionAnalyzer::appendPrewhere(
if (!select_query->prewhere())
return false;
initChain(chain, sourceColumns());
auto & step = chain.getLastStep();
auto & step = chain.lastStep(sourceColumns());
getRootActions(select_query->prewhere(), only_types, step.actions);
String prewhere_column_name = select_query->prewhere()->getColumnName();
step.required_output.push_back(prewhere_column_name);
@ -701,8 +697,7 @@ bool SelectQueryExpressionAnalyzer::appendPrewhere(
void SelectQueryExpressionAnalyzer::appendPreliminaryFilter(ExpressionActionsChain & chain, ExpressionActionsPtr actions, String column_name)
{
initChain(chain, sourceColumns());
ExpressionActionsChain::Step & step = chain.steps.back();
ExpressionActionsChain::Step & step = chain.lastStep(sourceColumns());
// FIXME: assert(filter_info);
step.actions = std::move(actions);
@ -719,8 +714,7 @@ bool SelectQueryExpressionAnalyzer::appendWhere(ExpressionActionsChain & chain,
if (!select_query->where())
return false;
initChain(chain, sourceColumns());
ExpressionActionsChain::Step & step = chain.steps.back();
ExpressionActionsChain::Step & step = chain.lastStep(sourceColumns());
step.required_output.push_back(select_query->where()->getColumnName());
step.can_remove_required_output = {true};
@ -738,8 +732,7 @@ bool SelectQueryExpressionAnalyzer::appendGroupBy(ExpressionActionsChain & chain
if (!select_query->groupBy())
return false;
initChain(chain, sourceColumns());
ExpressionActionsChain::Step & step = chain.steps.back();
ExpressionActionsChain::Step & step = chain.lastStep(sourceColumns());
ASTs asts = select_query->groupBy()->children;
for (const auto & ast : asts)
@ -765,8 +758,7 @@ void SelectQueryExpressionAnalyzer::appendAggregateFunctionsArguments(Expression
{
const auto * select_query = getAggregatingQuery();
initChain(chain, sourceColumns());
ExpressionActionsChain::Step & step = chain.steps.back();
ExpressionActionsChain::Step & step = chain.lastStep(sourceColumns());
for (const auto & desc : aggregate_descriptions)
for (const auto & name : desc.argument_names)
@ -797,8 +789,7 @@ bool SelectQueryExpressionAnalyzer::appendHaving(ExpressionActionsChain & chain,
if (!select_query->having())
return false;
initChain(chain, aggregated_columns);
ExpressionActionsChain::Step & step = chain.steps.back();
ExpressionActionsChain::Step & step = chain.lastStep(aggregated_columns);
step.required_output.push_back(select_query->having()->getColumnName());
getRootActions(select_query->having(), only_types, step.actions);
@ -810,8 +801,7 @@ void SelectQueryExpressionAnalyzer::appendSelect(ExpressionActionsChain & chain,
{
const auto * select_query = getSelectQuery();
initChain(chain, aggregated_columns);
ExpressionActionsChain::Step & step = chain.steps.back();
ExpressionActionsChain::Step & step = chain.lastStep(aggregated_columns);
getRootActions(select_query->select(), only_types, step.actions);
@ -827,8 +817,7 @@ bool SelectQueryExpressionAnalyzer::appendOrderBy(ExpressionActionsChain & chain
if (!select_query->orderBy())
return false;
initChain(chain, aggregated_columns);
ExpressionActionsChain::Step & step = chain.steps.back();
ExpressionActionsChain::Step & step = chain.lastStep(aggregated_columns);
getRootActions(select_query->orderBy(), only_types, step.actions);
@ -860,8 +849,7 @@ bool SelectQueryExpressionAnalyzer::appendLimitBy(ExpressionActionsChain & chain
if (!select_query->limitBy())
return false;
initChain(chain, aggregated_columns);
ExpressionActionsChain::Step & step = chain.steps.back();
ExpressionActionsChain::Step & step = chain.lastStep(aggregated_columns);
getRootActions(select_query->limitBy(), only_types, step.actions);
@ -886,8 +874,7 @@ void SelectQueryExpressionAnalyzer::appendProjectResult(ExpressionActionsChain &
{
const auto * select_query = getSelectQuery();
initChain(chain, aggregated_columns);
ExpressionActionsChain::Step & step = chain.steps.back();
ExpressionActionsChain::Step & step = chain.lastStep(aggregated_columns);
NamesWithAliases result_columns;
@ -935,8 +922,7 @@ void SelectQueryExpressionAnalyzer::appendProjectResult(ExpressionActionsChain &
void ExpressionAnalyzer::appendExpression(ExpressionActionsChain & chain, const ASTPtr & expr, bool only_types)
{
initChain(chain, sourceColumns());
ExpressionActionsChain::Step & step = chain.steps.back();
ExpressionActionsChain::Step & step = chain.lastStep(sourceColumns());
getRootActions(expr, only_types, step.actions);
step.required_output.push_back(expr->getColumnName());
}
@ -1099,11 +1085,13 @@ ExpressionAnalysisResult::ExpressionAnalysisResult(
if (query_analyzer.hasTableJoin())
{
query_analyzer.appendJoinLeftKeys(chain, only_types || !first_stage);
before_join = chain.getLastActions(true);
if (before_join)
chain.addStep();
query_analyzer.appendJoin(chain, only_types || !first_stage);
query_analyzer.appendJoin(chain);
join = chain.getLastActions();
if (!join)

6
src/Interpreters/ExpressionAnalyzer.h
View File

@ -153,9 +153,6 @@ protected:
void analyzeAggregation();
bool makeAggregateDescriptions(ExpressionActionsPtr & actions);
/// columns - the columns that are present before the transformations begin.
void initChain(ExpressionActionsChain & chain, const NamesAndTypesList & columns) const;
const ASTSelectQuery * getSelectQuery() const;
bool isRemoteStorage() const;
@ -309,7 +306,8 @@ private:
/// Before aggregation:
bool appendArrayJoin(ExpressionActionsChain & chain, bool only_types);
bool appendJoin(ExpressionActionsChain & chain, bool only_types);
bool appendJoinLeftKeys(ExpressionActionsChain & chain, bool only_types);
bool appendJoin(ExpressionActionsChain & chain);
/// Add preliminary rows filtration. Actions are created in other expression analyzer to prevent any possible alias injection.
void appendPreliminaryFilter(ExpressionActionsChain & chain, ExpressionActionsPtr actions, String column_name);
/// remove_filter is set in ExpressionActionsChain::finalize();