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Views: Once started, finish all concurrent views before throwing

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Since sequential processing executes things in phases too, try to finish
all (non errored out) views before throwing any exception
This commit is contained in:
Raúl Marín 2021-06-28 13:32:27 +02:00
parent ce501bcf25
commit 69577a782f
7 changed files with 55 additions and 60 deletions
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8
docs/en/operations/system-tables/query_views_log.md
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@ -34,10 +34,10 @@ Columns:
- `ProfileEvents.Names` ([Array(String)](../../sql-reference/data-types/array.md)) — Counters that measure different metrics for this view. The description of them could be found in the table [system.events](#system_tables-events). It does not include events of views dependent on this one.
- `ProfileEvents.Values` ([Array(UInt64)](../../sql-reference/data-types/array.md)) — Values of metrics for this view that are listed in the `ProfileEvents.Names` column.
- `status` ([Enum8](../../sql-reference/data-types/enum.md)) — Status of the view. Values:
- `'Init' = 1` — The view was cancelled before writing anything to storage.
- `'WrittenPrefix' = 2` — The view was cancelled after writing its prefix to storage.
- `'WrittenBlock' = 3` — The view was cancelled after writing its blocks to storage. It might have materialized the input wholly, partially or none at all.
- `'WrittenSuffix' = 4` — The view wrote its suffix to storage. It completed successfully.
- `'QueryStart' = 1` — Successful start the view execution. Should not appear.
- `'QueryFinish' = 2` — Successful end of the view execution.
- `'ExceptionBeforeStart' = 3` — Exception before the start of the view execution.
- `'ExceptionWhileProcessing' = 4` — Exception during the view execution.
- `exception_code` ([Int32](../../sql-reference/data-types/int-uint.md)) — Code of an exception.
- `exception` ([String](../../sql-reference/data-types/string.md)) — Exception message.
- `stack_trace` ([String](../../sql-reference/data-types/string.md)) — [Stack trace](https://en.wikipedia.org/wiki/Stack_trace). An empty string, if the query was completed successfully.

62
src/DataStreams/PushingToViewsBlockOutputStream.cpp
View File

@ -149,7 +149,12 @@ PushingToViewsBlockOutputStream::PushingToViewsBlockOutputStream(
thread_status->memory_tracker.setParent(running_memory_tracker);
QueryViewsLogElement::ViewRuntimeStats runtime_stats{
target_name, type, thread_status, 0, std::chrono::system_clock::now(), QueryViewsLogElement::ViewStatus::INIT};
target_name,
type,
thread_status,
0,
std::chrono::system_clock::now(),
QueryViewsLogElement::ViewStatus::EXCEPTION_BEFORE_START};
views.emplace_back(ViewInfo{std::move(query), database_table, std::move(out), nullptr, std::move(runtime_stats)});
current_thread = running_thread;
@ -210,45 +215,30 @@ void PushingToViewsBlockOutputStream::write(const Block & block)
return;
/// Don't process materialized views if this block is duplicate
if (!getContext()->getSettingsRef().deduplicate_blocks_in_dependent_materialized_views && replicated_output && replicated_output->lastBlockIsDuplicate())
const Settings & settings = getContext()->getSettingsRef();
if (!settings.deduplicate_blocks_in_dependent_materialized_views && replicated_output && replicated_output->lastBlockIsDuplicate())
return;
const Settings & settings = getContext()->getSettingsRef();
const size_t max_threads = std::min(views.size(), (settings.parallel_view_processing ? static_cast<size_t>(settings.max_threads) : 1));
bool exception_happened = false;
if (max_threads > 1)
{
ThreadPool pool(max_threads);
std::atomic_uint8_t exception_count = 0;
for (auto & view : views)
{
pool.scheduleOrThrowOnError([&] {
setThreadName("PushingToViews");
if (exception_count.load(std::memory_order_relaxed))
return;
process(block, view);
if (view.exception)
exception_count.fetch_add(1, std::memory_order_relaxed);
});
}
pool.wait();
exception_happened = exception_count.load(std::memory_order_relaxed) != 0;
}
else
{
for (auto & view : views)
{
process(block, view);
if (view.exception)
{
exception_happened = true;
break;
}
}
}
if (exception_happened)
check_exceptions_in_views();
}
void PushingToViewsBlockOutputStream::writePrefix()
@ -262,7 +252,7 @@ void PushingToViewsBlockOutputStream::writePrefix()
if (view.exception)
{
log_query_views();
throw;
std::rethrow_exception(view.exception);
}
}
}
@ -287,10 +277,13 @@ void PushingToViewsBlockOutputStream::writeSuffix()
std::atomic_uint8_t exception_count = 0;
for (auto & view : views)
{
if (view.exception)
{
exception_happened = true;
continue;
}
pool.scheduleOrThrowOnError([&] {
setThreadName("PushingToViews");
if (exception_count.load(std::memory_order_relaxed))
return;
process_suffix(view);
if (view.exception)
@ -298,18 +291,20 @@ void PushingToViewsBlockOutputStream::writeSuffix()
});
}
pool.wait();
exception_happened = exception_count.load(std::memory_order_relaxed) != 0;
exception_happened |= exception_count.load(std::memory_order_relaxed) != 0;
}
else
{
for (auto & view : views)
{
process_suffix(view);
if (view.exception)
{
exception_happened = true;
break;
continue;
}
process_suffix(view);
if (view.exception)
exception_happened = true;
}
}
if (exception_happened)
@ -392,16 +387,15 @@ void PushingToViewsBlockOutputStream::process(const Block & block, ViewInfo & vi
}
in->readSuffix();
view.runtime_stats.setStatus(QueryViewsLogElement::ViewStatus::WRITTEN_BLOCK);
}
catch (Exception & ex)
{
ex.addMessage("while pushing to view " + view.table_id.getNameForLogs());
view.exception = std::current_exception();
view.set_exception(std::current_exception());
}
catch (...)
{
view.exception = std::current_exception();
view.set_exception(std::current_exception());
}
view.runtime_stats.elapsed_ms += watch.elapsedMilliseconds();
@ -422,16 +416,15 @@ void PushingToViewsBlockOutputStream::process_prefix(ViewInfo & view)
try
{
view.out->writePrefix();
view.runtime_stats.setStatus(QueryViewsLogElement::ViewStatus::WRITTEN_PREFIX);
}
catch (Exception & ex)
{
ex.addMessage("while writing prefix to view " + view.table_id.getNameForLogs());
view.exception = std::current_exception();
view.set_exception(std::current_exception());
}
catch (...)
{
view.exception = std::current_exception();
view.set_exception(std::current_exception());
}
view.runtime_stats.elapsed_ms += watch.elapsedMilliseconds();
}
@ -452,16 +445,16 @@ void PushingToViewsBlockOutputStream::process_suffix(ViewInfo & view)
try
{
view.out->writeSuffix();
view.runtime_stats.setStatus(QueryViewsLogElement::ViewStatus::WRITTEN_SUFFIX);
view.runtime_stats.setStatus(QueryViewsLogElement::ViewStatus::QUERY_FINISH);
}
catch (Exception & ex)
{
ex.addMessage("while writing suffix to view " + view.table_id.getNameForLogs());
view.exception = std::current_exception();
view.set_exception(std::current_exception());
}
catch (...)
{
view.exception = std::current_exception();
view.set_exception(std::current_exception());
}
view.runtime_stats.elapsed_ms += watch.elapsedMilliseconds();
if (!view.exception)
@ -491,12 +484,13 @@ void PushingToViewsBlockOutputStream::log_query_views()
{
const auto & settings = getContext()->getSettingsRef();
const UInt64 min_query_duration = settings.log_queries_min_query_duration_ms.totalMilliseconds();
const QueryViewsLogElement::ViewStatus min_status = settings.log_queries_min_type;
if (views.empty() || !settings.log_queries || !settings.log_query_views)
return;
for (auto & view : views)
{
if (min_query_duration && view.runtime_stats.elapsed_ms <= min_query_duration)
if ((min_query_duration && view.runtime_stats.elapsed_ms <= min_query_duration) || (view.runtime_stats.event_status < min_status))
continue;
try

6
src/DataStreams/PushingToViewsBlockOutputStream.h
View File

@ -23,6 +23,12 @@ struct ViewInfo
BlockOutputStreamPtr out;
std::exception_ptr exception;
QueryViewsLogElement::ViewRuntimeStats runtime_stats;
void set_exception(std::exception_ptr e)
{
exception = e;
runtime_stats.setStatus(QueryViewsLogElement::ViewStatus::EXCEPTION_WHILE_PROCESSING);
}
};
/** Writes data to the specified table and to all dependent materialized views.

8
src/Interpreters/QueryViewsLog.cpp
View File

@ -19,10 +19,10 @@ namespace DB
Block QueryViewsLogElement::createBlock()
{
auto view_status_datatype = std::make_shared<DataTypeEnum8>(DataTypeEnum8::Values{
{"Init", static_cast<Int8>(ViewStatus::INIT)},
{"WrittenPrefix", static_cast<Int8>(ViewStatus::WRITTEN_PREFIX)},
{"WrittenBlock", static_cast<Int8>(ViewStatus::WRITTEN_BLOCK)},
{"WrittenSuffix", static_cast<Int8>(ViewStatus::WRITTEN_SUFFIX)}});
{"QueryStart", static_cast<Int8>(QUERY_START)},
{"QueryFinish", static_cast<Int8>(QUERY_FINISH)},
{"ExceptionBeforeStart", static_cast<Int8>(EXCEPTION_BEFORE_START)},
{"ExceptionWhileProcessing", static_cast<Int8>(EXCEPTION_WHILE_PROCESSING)}});
auto view_type_datatype = std::make_shared<DataTypeEnum8>(DataTypeEnum8::Values{
{"Default", static_cast<Int8>(ViewType::DEFAULT)},

11
src/Interpreters/QueryViewsLog.h
View File

@ -23,14 +23,7 @@ class ThreadStatus;
struct QueryViewsLogElement
{
enum class ViewStatus : int8_t
{
INIT = 1,
WRITTEN_PREFIX = 2,
WRITTEN_BLOCK = 3,
WRITTEN_SUFFIX = 4
};
using ViewStatus = QueryLogElementType;
enum class ViewType : int8_t
{
@ -46,7 +39,7 @@ struct QueryViewsLogElement
std::shared_ptr<ThreadStatus> thread_status = nullptr;
UInt64 elapsed_ms = 0;
std::chrono::time_point<std::chrono::system_clock> event_time;
ViewStatus event_status = ViewStatus::INIT;
ViewStatus event_status = ViewStatus::QUERY_START;
void setStatus(ViewStatus s)
{

11
tests/queries/0_stateless/01925_query_views_log_current_database.reference
View File

@ -1,6 +1,7 @@
{"stage":"Query log rows","read_rows":"100","written_rows":"201","databases":["_table_function","default"],"tables":["_table_function.numbers","default.table_a","default.table_b","default.table_b_live_view","default.table_c"],"views":["default.matview_a_to_b","default.matview_b_to_c","default.table_b_live_view"]}
{"stage":"Depending views","view_name":"default.matview_a_to_b","view_target":"default.table_b","view_query":"SELECT toFloat64(a) AS a, b AS count FROM default.table_a"}
{"stage":"Depending views","view_name":"default.matview_b_to_c","view_target":"default.table_c","view_query":"SELECT sum(a) AS a FROM default.table_b"}
{"stage":"Depending views","view_name":"default.table_b_live_view","view_target":"default.table_b_live_view","view_query":"SELECT sum(a + b) FROM default.table_b"}
{"stage":"Query log rows","read_rows":"100","written_rows":"202","databases":["_table_function","default"],"tables":["_table_function.numbers","default.`.inner_id.12312312-1234-8765-8420-000000000001`","default.table_a","default.table_b","default.table_b_live_view","default.table_c"],"views":["default.matview_a_to_b","default.matview_b_to_c","default.matview_b_to_c_inner","default.table_b_live_view"]}
{"stage":"Depending views","view_name":"default.matview_a_to_b","status":"QueryFinish","view_target":"default.table_b","view_query":"SELECT toFloat64(a) AS a, b AS count FROM default.table_a"}
{"stage":"Depending views","view_name":"default.matview_b_to_c","status":"QueryFinish","view_target":"default.table_c","view_query":"SELECT sum(a) AS a FROM default.table_b"}
{"stage":"Depending views","view_name":"default.matview_b_to_c_inner","status":"QueryFinish","view_target":"default.`.inner_id.12312312-1234-8765-8420-000000000001`","view_query":"SELECT sum(a) AS a FROM default.table_b"}
{"stage":"Depending views","view_name":"default.table_b_live_view","status":"QueryFinish","view_target":"default.table_b_live_view","view_query":"SELECT sum(a + b) FROM default.table_b"}
{"stage":"Query log rows 2","read_rows":"50","written_rows":"100","databases":["_table_function","default"],"tables":["_table_function.numbers","default.table_d","default.table_e","default.table_f"],"views":["default.matview_join_d_e"]}
{"stage":"Depending views 2","view_name":"default.matview_join_d_e","view_target":"default.table_f","view_query":"SELECT table_d.a AS a, table_e.count AS count FROM default.table_d LEFT JOIN default.table_e ON table_d.a = table_e.a"}
{"stage":"Depending views 2","view_name":"default.matview_join_d_e","status":"QueryFinish","view_target":"default.table_f","view_query":"SELECT table_d.a AS a, table_e.count AS count FROM default.table_d LEFT JOIN default.table_e ON table_d.a = table_e.a"}

9
tests/queries/0_stateless/01925_query_views_log_current_database.sql
View File

@ -14,12 +14,9 @@ CREATE TABLE table_f (a Float64, count Int64) ENGINE MergeTree ORDER BY a;
-- SETUP MATERIALIZED VIEWS
CREATE MATERIALIZED VIEW matview_a_to_b TO table_b AS SELECT toFloat64(a) AS a, b AS count FROM table_a;
CREATE MATERIALIZED VIEW matview_b_to_c TO table_c AS SELECT SUM(a) as a FROM table_b;
CREATE MATERIALIZED VIEW matview_b_to_c_inner UUID '12312312-1234-8765-8420-000000000001' ENGINE TinyLog AS SELECT SUM(a) as a FROM table_b;
CREATE MATERIALIZED VIEW matview_join_d_e TO table_f AS SELECT table_d.a as a, table_e.count as count FROM table_d LEFT JOIN table_e ON table_d.a = table_e.a;
-- We don't include test materialized views here since the name is based on the uuid on atomic databases
-- and that makes the test harder to read
-- SETUP LIVE VIEW
---- table_b_live_view (Int64)
DROP TABLE IF EXISTS table_b_live_view;
@ -56,6 +53,7 @@ FORMAT JSONEachRow;
SELECT
'Depending views' as stage,
view_name,
status,
view_target,
view_query
FROM system.query_views_log
@ -88,6 +86,7 @@ FORMAT JSONEachRow;
SELECT
'Depending views 2' as stage,
view_name,
status,
view_target,
view_query
FROM system.query_views_log
@ -107,6 +106,8 @@ ORDER BY view_name
DROP TABLE table_b_live_view;
DROP TABLE matview_a_to_b;
DROP TABLE matview_b_to_c;
DROP TABLE matview_b_to_c_inner SYNC;
DROP TABLE matview_join_d_e;
DROP TABLE table_f;
DROP TABLE table_e;
DROP TABLE table_d;