ClickHouse/src/Interpreters/InterpreterInsertQuery.cpp
Robert Schulze b24ca8de52
Fix various clang-tidy warnings
When I tried to add cool new clang-tidy 14 warnings, I noticed that the
current clang-tidy settings already produce a ton of warnings. This
commit addresses many of these. Almost all of them were non-critical,
i.e. C vs. C++ style casts.
2022-04-20 10:29:05 +02:00

517 lines
21 KiB
C++

#include <Interpreters/InterpreterInsertQuery.h>
#include <Access/Common/AccessFlags.h>
#include <Access/EnabledQuota.h>
#include <Columns/ColumnNullable.h>
#include <Processors/Transforms/buildPushingToViewsChain.h>
#include <DataTypes/DataTypeNullable.h>
#include <IO/ConnectionTimeoutsContext.h>
#include <Interpreters/InterpreterSelectWithUnionQuery.h>
#include <Interpreters/InterpreterWatchQuery.h>
#include <Interpreters/QueryLog.h>
#include <Interpreters/TranslateQualifiedNamesVisitor.h>
#include <Interpreters/addMissingDefaults.h>
#include <Interpreters/getTableExpressions.h>
#include <Interpreters/processColumnTransformers.h>
#include <Parsers/ASTFunction.h>
#include <Parsers/ASTInsertQuery.h>
#include <Parsers/ASTSelectQuery.h>
#include <Parsers/ASTSelectWithUnionQuery.h>
#include <Parsers/ASTTablesInSelectQuery.h>
#include <Processors/Sinks/EmptySink.h>
#include <Processors/Transforms/CheckConstraintsTransform.h>
#include <Processors/Transforms/CountingTransform.h>
#include <Processors/Transforms/ExpressionTransform.h>
#include <Processors/Transforms/MaterializingTransform.h>
#include <Processors/Transforms/SquashingChunksTransform.h>
#include <Processors/Transforms/getSourceFromASTInsertQuery.h>
#include <Storages/StorageDistributed.h>
#include <Storages/StorageMaterializedView.h>
#include <TableFunctions/TableFunctionFactory.h>
#include <Common/checkStackSize.h>
namespace DB
{
namespace ErrorCodes
{
extern const int NOT_IMPLEMENTED;
extern const int NO_SUCH_COLUMN_IN_TABLE;
extern const int ILLEGAL_COLUMN;
extern const int DUPLICATE_COLUMN;
}
InterpreterInsertQuery::InterpreterInsertQuery(
const ASTPtr & query_ptr_, ContextPtr context_, bool allow_materialized_, bool no_squash_, bool no_destination_, bool async_insert_)
: WithContext(context_)
, query_ptr(query_ptr_)
, allow_materialized(allow_materialized_)
, no_squash(no_squash_)
, no_destination(no_destination_)
, async_insert(async_insert_)
{
checkStackSize();
if (auto quota = getContext()->getQuota())
quota->checkExceeded(QuotaType::WRITTEN_BYTES);
}
StoragePtr InterpreterInsertQuery::getTable(ASTInsertQuery & query)
{
if (query.table_function)
{
const auto & factory = TableFunctionFactory::instance();
TableFunctionPtr table_function_ptr = factory.get(query.table_function, getContext());
/// If table function needs structure hint from select query
/// we can create a temporary pipeline and get the header.
if (query.select && table_function_ptr->needStructureHint())
{
InterpreterSelectWithUnionQuery interpreter_select{
query.select, getContext(), SelectQueryOptions(QueryProcessingStage::Complete, 1)};
QueryPipelineBuilder tmp_pipeline = interpreter_select.buildQueryPipeline();
ColumnsDescription structure_hint{tmp_pipeline.getHeader().getNamesAndTypesList()};
table_function_ptr->setStructureHint(structure_hint);
}
return table_function_ptr->execute(query.table_function, getContext(), table_function_ptr->getName());
}
if (query.table_id)
{
query.table_id = getContext()->resolveStorageID(query.table_id);
}
else
{
/// Insert query parser does not fill table_id because table and
/// database can be parameters and be filled after parsing.
StorageID local_table_id(query.getDatabase(), query.getTable());
query.table_id = getContext()->resolveStorageID(local_table_id);
}
return DatabaseCatalog::instance().getTable(query.table_id, getContext());
}
Block InterpreterInsertQuery::getSampleBlock(
const ASTInsertQuery & query,
const StoragePtr & table,
const StorageMetadataPtr & metadata_snapshot) const
{
/// If the query does not include information about columns
if (!query.columns)
{
if (no_destination)
return metadata_snapshot->getSampleBlockWithVirtuals(table->getVirtuals());
else
return metadata_snapshot->getSampleBlockNonMaterialized();
}
/// Form the block based on the column names from the query
Names names;
const auto columns_ast = processColumnTransformers(getContext()->getCurrentDatabase(), table, metadata_snapshot, query.columns);
for (const auto & identifier : columns_ast->children)
{
std::string current_name = identifier->getColumnName();
names.emplace_back(std::move(current_name));
}
return getSampleBlock(names, table, metadata_snapshot);
}
Block InterpreterInsertQuery::getSampleBlock(
const Names & names,
const StoragePtr & table,
const StorageMetadataPtr & metadata_snapshot) const
{
Block table_sample_physical = metadata_snapshot->getSampleBlock();
Block table_sample_insertable = metadata_snapshot->getSampleBlockInsertable();
Block res;
for (const auto & current_name : names)
{
if (res.has(current_name))
throw Exception("Column " + current_name + " specified more than once", ErrorCodes::DUPLICATE_COLUMN);
/// Column is not ordinary or ephemeral
if (!table_sample_insertable.has(current_name))
{
/// Column is materialized
if (table_sample_physical.has(current_name))
{
if (!allow_materialized)
throw Exception("Cannot insert column " + current_name + ", because it is MATERIALIZED column.",
ErrorCodes::ILLEGAL_COLUMN);
res.insert(ColumnWithTypeAndName(table_sample_physical.getByName(current_name).type, current_name));
}
else /// The table does not have a column with that name
throw Exception("No such column " + current_name + " in table " + table->getStorageID().getNameForLogs(),
ErrorCodes::NO_SUCH_COLUMN_IN_TABLE);
}
else
res.insert(ColumnWithTypeAndName(table_sample_insertable.getByName(current_name).type, current_name));
}
return res;
}
/** A query that just reads all data without any complex computations or filetering.
* If we just pipe the result to INSERT, we don't have to use too many threads for read.
*/
static bool isTrivialSelect(const ASTPtr & select)
{
if (auto * select_query = select->as<ASTSelectQuery>())
{
const auto & tables = select_query->tables();
if (!tables)
return false;
const auto & tables_in_select_query = tables->as<ASTTablesInSelectQuery &>();
if (tables_in_select_query.children.size() != 1)
return false;
const auto & child = tables_in_select_query.children.front();
const auto & table_element = child->as<ASTTablesInSelectQueryElement &>();
const auto & table_expr = table_element.table_expression->as<ASTTableExpression &>();
if (table_expr.subquery)
return false;
/// Note: how to write it in more generic way?
return (!select_query->distinct
&& !select_query->limit_with_ties
&& !select_query->prewhere()
&& !select_query->where()
&& !select_query->groupBy()
&& !select_query->having()
&& !select_query->orderBy()
&& !select_query->limitBy());
}
/// This query is ASTSelectWithUnionQuery subquery
return false;
};
Chain InterpreterInsertQuery::buildChain(
const StoragePtr & table,
const StorageMetadataPtr & metadata_snapshot,
const Names & columns,
ThreadStatus * thread_status,
std::atomic_uint64_t * elapsed_counter_ms)
{
auto sample = getSampleBlock(columns, table, metadata_snapshot);
return buildChainImpl(table, metadata_snapshot, sample, thread_status, elapsed_counter_ms);
}
Chain InterpreterInsertQuery::buildChainImpl(
const StoragePtr & table,
const StorageMetadataPtr & metadata_snapshot,
const Block & query_sample_block,
ThreadStatus * thread_status,
std::atomic_uint64_t * elapsed_counter_ms)
{
auto context_ptr = getContext();
const ASTInsertQuery * query = nullptr;
if (query_ptr)
query = query_ptr->as<ASTInsertQuery>();
const Settings & settings = context_ptr->getSettingsRef();
bool null_as_default = query && query->select && context_ptr->getSettingsRef().insert_null_as_default;
/// We create a pipeline of several streams, into which we will write data.
Chain out;
/// Keep a reference to the context to make sure it stays alive until the chain is executed and destroyed
out.addInterpreterContext(context_ptr);
/// NOTE: we explicitly ignore bound materialized views when inserting into Kafka Storage.
/// Otherwise we'll get duplicates when MV reads same rows again from Kafka.
if (table->noPushingToViews() && !no_destination)
{
auto sink = table->write(query_ptr, metadata_snapshot, context_ptr);
sink->setRuntimeData(thread_status, elapsed_counter_ms);
out.addSource(std::move(sink));
}
else
{
out = buildPushingToViewsChain(table, metadata_snapshot, context_ptr, query_ptr, no_destination, thread_status, elapsed_counter_ms);
}
/// Note that we wrap transforms one on top of another, so we write them in reverse of data processing order.
/// Checking constraints. It must be done after calculation of all defaults, so we can check them on calculated columns.
if (const auto & constraints = metadata_snapshot->getConstraints(); !constraints.empty())
out.addSource(std::make_shared<CheckConstraintsTransform>(
table->getStorageID(), out.getInputHeader(), metadata_snapshot->getConstraints(), context_ptr));
auto adding_missing_defaults_dag = addMissingDefaults(
query_sample_block,
out.getInputHeader().getNamesAndTypesList(),
metadata_snapshot->getColumns(),
context_ptr,
null_as_default);
auto adding_missing_defaults_actions = std::make_shared<ExpressionActions>(adding_missing_defaults_dag);
/// Actually we don't know structure of input blocks from query/table,
/// because some clients break insertion protocol (columns != header)
out.addSource(std::make_shared<ConvertingTransform>(query_sample_block, adding_missing_defaults_actions));
/// It's important to squash blocks as early as possible (before other transforms),
/// because other transforms may work inefficient if block size is small.
/// Do not squash blocks if it is a sync INSERT into Distributed, since it lead to double bufferization on client and server side.
/// Client-side bufferization might cause excessive timeouts (especially in case of big blocks).
if (!(settings.insert_distributed_sync && table->isRemote()) && !no_squash && !(query && query->watch))
{
bool table_prefers_large_blocks = table->prefersLargeBlocks();
out.addSource(std::make_shared<SquashingChunksTransform>(
out.getInputHeader(),
table_prefers_large_blocks ? settings.min_insert_block_size_rows : settings.max_block_size,
table_prefers_large_blocks ? settings.min_insert_block_size_bytes : 0));
}
auto counting = std::make_shared<CountingTransform>(out.getInputHeader(), thread_status, getContext()->getQuota());
counting->setProcessListElement(context_ptr->getProcessListElement());
out.addSource(std::move(counting));
return out;
}
BlockIO InterpreterInsertQuery::execute()
{
const Settings & settings = getContext()->getSettingsRef();
auto & query = query_ptr->as<ASTInsertQuery &>();
QueryPipelineBuilder pipeline;
StoragePtr table = getTable(query);
checkStorageSupportsTransactionsIfNeeded(table, getContext());
StoragePtr inner_table;
if (const auto * mv = dynamic_cast<const StorageMaterializedView *>(table.get()))
inner_table = mv->getTargetTable();
if (query.partition_by && !table->supportsPartitionBy())
throw Exception(ErrorCodes::NOT_IMPLEMENTED, "PARTITION BY clause is not supported by storage");
auto table_lock = table->lockForShare(getContext()->getInitialQueryId(), settings.lock_acquire_timeout);
auto metadata_snapshot = table->getInMemoryMetadataPtr();
auto query_sample_block = getSampleBlock(query, table, metadata_snapshot);
/// For table functions we check access while executing
/// getTable() -> ITableFunction::execute().
if (!query.table_function)
getContext()->checkAccess(AccessType::INSERT, query.table_id, query_sample_block.getNames());
bool is_distributed_insert_select = false;
if (query.select && table->isRemote() && settings.parallel_distributed_insert_select)
{
// Distributed INSERT SELECT
if (auto maybe_pipeline = table->distributedWrite(query, getContext()))
{
pipeline = std::move(*maybe_pipeline);
is_distributed_insert_select = true;
}
}
std::vector<Chain> out_chains;
if (!is_distributed_insert_select || query.watch)
{
size_t out_streams_size = 1;
if (query.select)
{
bool is_trivial_insert_select = false;
if (settings.optimize_trivial_insert_select)
{
const auto & select_query = query.select->as<ASTSelectWithUnionQuery &>();
const auto & selects = select_query.list_of_selects->children;
const auto & union_modes = select_query.list_of_modes;
/// ASTSelectWithUnionQuery is not normalized now, so it may pass some queries which can be Trivial select queries
const auto mode_is_all = [](const auto & mode) { return mode == SelectUnionMode::ALL; };
is_trivial_insert_select =
std::all_of(union_modes.begin(), union_modes.end(), std::move(mode_is_all))
&& std::all_of(selects.begin(), selects.end(), isTrivialSelect);
}
if (is_trivial_insert_select)
{
/** When doing trivial INSERT INTO ... SELECT ... FROM table,
* don't need to process SELECT with more than max_insert_threads
* and it's reasonable to set block size for SELECT to the desired block size for INSERT
* to avoid unnecessary squashing.
*/
Settings new_settings = getContext()->getSettings();
new_settings.max_threads = std::max<UInt64>(1, settings.max_insert_threads);
if (table->prefersLargeBlocks())
{
if (settings.min_insert_block_size_rows)
new_settings.max_block_size = settings.min_insert_block_size_rows;
if (settings.min_insert_block_size_bytes)
new_settings.preferred_block_size_bytes = settings.min_insert_block_size_bytes;
}
auto new_context = Context::createCopy(context);
new_context->setSettings(new_settings);
new_context->setInsertionTable(getContext()->getInsertionTable());
InterpreterSelectWithUnionQuery interpreter_select{
query.select, new_context, SelectQueryOptions(QueryProcessingStage::Complete, 1)};
pipeline = interpreter_select.buildQueryPipeline();
}
else
{
/// Passing 1 as subquery_depth will disable limiting size of intermediate result.
InterpreterSelectWithUnionQuery interpreter_select{
query.select, getContext(), SelectQueryOptions(QueryProcessingStage::Complete, 1)};
pipeline = interpreter_select.buildQueryPipeline();
}
pipeline.dropTotalsAndExtremes();
if (table->supportsParallelInsert() && settings.max_insert_threads > 1)
out_streams_size = std::min(static_cast<size_t>(settings.max_insert_threads), pipeline.getNumStreams());
pipeline.resize(out_streams_size);
/// Allow to insert Nullable into non-Nullable columns, NULL values will be added as defaults values.
if (getContext()->getSettingsRef().insert_null_as_default)
{
const auto & input_columns = pipeline.getHeader().getColumnsWithTypeAndName();
const auto & query_columns = query_sample_block.getColumnsWithTypeAndName();
const auto & output_columns = metadata_snapshot->getColumns();
if (input_columns.size() == query_columns.size())
{
for (size_t col_idx = 0; col_idx < query_columns.size(); ++col_idx)
{
/// Change query sample block columns to Nullable to allow inserting nullable columns, where NULL values will be substituted with
/// default column values (in AddingDefaultBlockOutputStream), so all values will be cast correctly.
if (input_columns[col_idx].type->isNullable() && !query_columns[col_idx].type->isNullable() && output_columns.hasDefault(query_columns[col_idx].name))
query_sample_block.setColumn(col_idx, ColumnWithTypeAndName(makeNullable(query_columns[col_idx].column), makeNullable(query_columns[col_idx].type), query_columns[col_idx].name));
}
}
}
}
else if (query.watch)
{
InterpreterWatchQuery interpreter_watch{ query.watch, getContext() };
pipeline = interpreter_watch.buildQueryPipeline();
}
for (size_t i = 0; i < out_streams_size; ++i)
{
auto out = buildChainImpl(table, metadata_snapshot, query_sample_block, nullptr, nullptr);
out_chains.emplace_back(std::move(out));
}
}
BlockIO res;
/// What type of query: INSERT or INSERT SELECT or INSERT WATCH?
if (is_distributed_insert_select)
{
res.pipeline = QueryPipelineBuilder::getPipeline(std::move(pipeline));
}
else if (query.select || query.watch)
{
const auto & header = out_chains.at(0).getInputHeader();
auto actions_dag = ActionsDAG::makeConvertingActions(
pipeline.getHeader().getColumnsWithTypeAndName(),
header.getColumnsWithTypeAndName(),
ActionsDAG::MatchColumnsMode::Position);
auto actions = std::make_shared<ExpressionActions>(actions_dag, ExpressionActionsSettings::fromContext(getContext(), CompileExpressions::yes));
pipeline.addSimpleTransform([&](const Block & in_header) -> ProcessorPtr
{
return std::make_shared<ExpressionTransform>(in_header, actions);
});
/// We need to convert Sparse columns to full, because it's destination storage
/// may not support it may have different settings for applying Sparse serialization.
pipeline.addSimpleTransform([&](const Block & in_header) -> ProcessorPtr
{
return std::make_shared<MaterializingTransform>(in_header);
});
size_t num_select_threads = pipeline.getNumThreads();
size_t num_insert_threads = std::max_element(out_chains.begin(), out_chains.end(), [&](const auto &a, const auto &b)
{
return a.getNumThreads() < b.getNumThreads();
})->getNumThreads();
pipeline.addChains(std::move(out_chains));
pipeline.setMaxThreads(num_insert_threads);
/// Don't use more threads for insert then for select to reduce memory consumption.
if (!settings.parallel_view_processing && pipeline.getNumThreads() > num_select_threads)
pipeline.setMaxThreads(num_select_threads);
pipeline.setSinks([&](const Block & cur_header, QueryPipelineBuilder::StreamType) -> ProcessorPtr
{
return std::make_shared<EmptySink>(cur_header);
});
if (!allow_materialized)
{
for (const auto & column : metadata_snapshot->getColumns())
if (column.default_desc.kind == ColumnDefaultKind::Materialized && header.has(column.name))
throw Exception("Cannot insert column " + column.name + ", because it is MATERIALIZED column.", ErrorCodes::ILLEGAL_COLUMN);
}
res.pipeline = QueryPipelineBuilder::getPipeline(std::move(pipeline));
}
else
{
res.pipeline = QueryPipeline(std::move(out_chains.at(0)));
res.pipeline.setNumThreads(std::min<size_t>(res.pipeline.getNumThreads(), settings.max_threads));
if (query.hasInlinedData() && !async_insert)
{
/// can execute without additional data
auto pipe = getSourceFromASTInsertQuery(query_ptr, true, query_sample_block, getContext(), nullptr);
res.pipeline.complete(std::move(pipe));
}
}
res.pipeline.addStorageHolder(table);
if (inner_table)
res.pipeline.addStorageHolder(inner_table);
return res;
}
StorageID InterpreterInsertQuery::getDatabaseTable() const
{
return query_ptr->as<ASTInsertQuery &>().table_id;
}
void InterpreterInsertQuery::extendQueryLogElemImpl(QueryLogElement & elem, ContextPtr context_)
{
elem.query_kind = "Insert";
const auto & insert_table = context_->getInsertionTable();
if (!insert_table.empty())
{
elem.query_databases.insert(insert_table.getDatabaseName());
elem.query_tables.insert(insert_table.getFullNameNotQuoted());
}
}
void InterpreterInsertQuery::extendQueryLogElemImpl(QueryLogElement & elem, const ASTPtr &, ContextPtr context_) const
{
extendQueryLogElemImpl(elem, context_);
}
}