ClickHouse/src/Storages/StorageMaterializedView.cpp

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#include <Storages/StorageMaterializedView.h>
#include <Parsers/ASTSelectQuery.h>
#include <Parsers/ASTSelectWithUnionQuery.h>
#include <Parsers/ASTCreateQuery.h>
#include <Parsers/ASTDropQuery.h>
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#include <Interpreters/Context.h>
#include <Interpreters/InterpreterCreateQuery.h>
#include <Interpreters/InterpreterDropQuery.h>
#include <Interpreters/InterpreterRenameQuery.h>
#include <Interpreters/getTableExpressions.h>
#include <Interpreters/AddDefaultDatabaseVisitor.h>
#include <Interpreters/getHeaderForProcessingStage.h>
#include <Access/AccessFlags.h>
#include <DataStreams/IBlockInputStream.h>
#include <DataStreams/IBlockOutputStream.h>
#include <Storages/AlterCommands.h>
#include <Storages/StorageFactory.h>
#include <Storages/ReadInOrderOptimizer.h>
#include <Storages/SelectQueryDescription.h>
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#include <Common/typeid_cast.h>
#include <Common/checkStackSize.h>
#include <Processors/Sources/SourceFromInputStream.h>
#include <Processors/QueryPlan/SettingQuotaAndLimitsStep.h>
#include <Processors/QueryPlan/ExpressionStep.h>
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namespace DB
{
namespace ErrorCodes
{
extern const int BAD_ARGUMENTS;
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extern const int NOT_IMPLEMENTED;
extern const int INCORRECT_QUERY;
extern const int QUERY_IS_NOT_SUPPORTED_IN_MATERIALIZED_VIEW;
}
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static inline String generateInnerTableName(const StorageID & view_id)
{
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if (view_id.hasUUID())
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return ".inner_id." + toString(view_id.uuid);
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return ".inner." + view_id.getTableName();
}
StorageMaterializedView::StorageMaterializedView(
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const StorageID & table_id_,
Context & local_context,
const ASTCreateQuery & query,
const ColumnsDescription & columns_,
bool attach_)
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: IStorage(table_id_), global_context(local_context.getGlobalContext())
{
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StorageInMemoryMetadata storage_metadata;
storage_metadata.setColumns(columns_);
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if (!query.select)
throw Exception("SELECT query is not specified for " + getName(), ErrorCodes::INCORRECT_QUERY);
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/// If the destination table is not set, use inner table
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has_inner_table = query.to_table_id.empty();
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if (has_inner_table && !query.storage)
throw Exception(
"You must specify where to save results of a MaterializedView query: either ENGINE or an existing table in a TO clause",
ErrorCodes::INCORRECT_QUERY);
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if (query.select->list_of_selects->children.size() != 1)
throw Exception("UNION is not supported for MATERIALIZED VIEW", ErrorCodes::QUERY_IS_NOT_SUPPORTED_IN_MATERIALIZED_VIEW);
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auto select = SelectQueryDescription::getSelectQueryFromASTForMatView(query.select->clone(), local_context);
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storage_metadata.setSelectQuery(select);
setInMemoryMetadata(storage_metadata);
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if (!has_inner_table)
{
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if (query.to_table_id.database_name == table_id_.database_name && query.to_table_id.table_name == table_id_.table_name)
throw Exception(ErrorCodes::BAD_ARGUMENTS, "Materialized view {} cannot point to itself", table_id_.getFullTableName());
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target_table_id = query.to_table_id;
}
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else if (attach_)
{
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/// If there is an ATTACH request, then the internal table must already be created.
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target_table_id = StorageID(getStorageID().database_name, generateInnerTableName(getStorageID()));
}
else
{
/// We will create a query to create an internal table.
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auto create_context = Context(local_context);
auto manual_create_query = std::make_shared<ASTCreateQuery>();
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manual_create_query->database = getStorageID().database_name;
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manual_create_query->table = generateInnerTableName(getStorageID());
Data Skipping Indices (#4143) * made index parser * added index parsing * some fixes * added index interface and factory * fixed compilation * ptrs * added indexParts * indextypes * index condition * IndexCondition * added indexes in selectexecutor * fix * changed comment * fix * added granularity * comments * fix * fix * added writing indexes * removed indexpart class * fix * added setSkipIndexes * add rw for MergeTreeIndexes * fixes * upd error * fix * fix * reading * test index * fixed nullptr error * fixed * fix * unique names * asts -> exprlist * minmax index * fix * fixed select * fixed merging * fixed mutation * working minmax * removed test index * fixed style * added indexes to checkDataPart * added tests for minmax index * fixed constructor * fix style * fixed includes * fixed setSkipIndexes * added indexes meta to zookeeper * added parsing * removed throw * alter cmds parse * fix * added alter * fix * alters fix * fix alters * fix "after" * fixed alter * alter fix + test * fixes * upd setSkipIndexes * fixed alter bug with drop all indices * fix metadata editing * new test and repl fix * rm test files * fixed repl alter * fix * fix * indices * MTReadStream * upd test for bug * fix * added useful parsers and ast classes * fix * fix comments * replaced columns * fix * fixed parsing * fixed printing * fix err * basic IndicesDescription * go to IndicesDescr * moved indices * go to indicesDescr * fix test minmax_index* * fixed MT alter * fixed bug with replMT indices storing in zk * rename * refactoring * docs ru * docs ru * docs en * refactor * rename tests * fix docs * refactoring * fix * fix * fix * fixed style * unique idx * unique * fix * better minmax calculation * upd * added getBlock * unique_condition * added termForAST * unique * fixed not * uniqueCondition::mayBeTrueOnGranule * fix * fixed bug with double column * is always true * fix * key set * spaces * test * tests * fix * unique * fix * fix * fixed bug with duplicate column * removed unused data * fix * fixes * __bitSwapLastTwo * fix
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auto new_columns_list = std::make_shared<ASTColumns>();
new_columns_list->set(new_columns_list->columns, query.columns_list->columns->ptr());
manual_create_query->set(manual_create_query->columns_list, new_columns_list);
manual_create_query->set(manual_create_query->storage, query.storage->ptr());
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InterpreterCreateQuery create_interpreter(manual_create_query, create_context);
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create_interpreter.setInternal(true);
create_interpreter.execute();
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target_table_id = DatabaseCatalog::instance().getTable({manual_create_query->database, manual_create_query->table}, global_context)->getStorageID();
}
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if (!select.select_table_id.empty())
DatabaseCatalog::instance().addDependency(select.select_table_id, getStorageID());
}
QueryProcessingStage::Enum StorageMaterializedView::getQueryProcessingStage(const Context & context, QueryProcessingStage::Enum to_stage, SelectQueryInfo & query_info) const
{
return getTargetTable()->getQueryProcessingStage(context, to_stage, query_info);
}
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Pipe StorageMaterializedView::read(
const Names & column_names,
const StorageMetadataPtr & metadata_snapshot,
SelectQueryInfo & query_info,
const Context & context,
QueryProcessingStage::Enum processed_stage,
const size_t max_block_size,
const unsigned num_streams)
{
QueryPlan plan;
read(plan, column_names, metadata_snapshot, query_info, context, processed_stage, max_block_size, num_streams);
return plan.convertToPipe(QueryPlanOptimizationSettings(context.getSettingsRef()));
}
void StorageMaterializedView::read(
QueryPlan & query_plan,
const Names & column_names,
const StorageMetadataPtr & metadata_snapshot,
SelectQueryInfo & query_info,
const Context & context,
QueryProcessingStage::Enum processed_stage,
const size_t max_block_size,
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const unsigned num_streams)
{
auto storage = getTargetTable();
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auto lock = storage->lockForShare(context.getCurrentQueryId(), context.getSettingsRef().lock_acquire_timeout);
auto target_metadata_snapshot = storage->getInMemoryMetadataPtr();
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if (query_info.order_optimizer)
query_info.input_order_info = query_info.order_optimizer->getInputOrder(target_metadata_snapshot, context);
storage->read(query_plan, column_names, target_metadata_snapshot, query_info, context, processed_stage, max_block_size, num_streams);
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if (query_plan.isInitialized())
{
auto mv_header = getHeaderForProcessingStage(*this, column_names, metadata_snapshot, query_info, context, processed_stage);
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auto target_header = query_plan.getCurrentDataStream().header;
if (!blocksHaveEqualStructure(mv_header, target_header))
{
auto converting_actions = ActionsDAG::makeConvertingActions(target_header.getColumnsWithTypeAndName(),
mv_header.getColumnsWithTypeAndName(),
ActionsDAG::MatchColumnsMode::Name);
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auto converting_step = std::make_unique<ExpressionStep>(query_plan.getCurrentDataStream(), converting_actions, context);
converting_step->setStepDescription("Convert target table structure to MaterializedView structure");
query_plan.addStep(std::move(converting_step));
}
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StreamLocalLimits limits;
SizeLimits leaf_limits;
/// Add table lock for destination table.
auto adding_limits_and_quota = std::make_unique<SettingQuotaAndLimitsStep>(
query_plan.getCurrentDataStream(),
storage,
std::move(lock),
limits,
leaf_limits,
nullptr,
nullptr);
adding_limits_and_quota->setStepDescription("Lock destination table for MaterializedView");
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query_plan.addStep(std::move(adding_limits_and_quota));
}
}
BlockOutputStreamPtr StorageMaterializedView::write(const ASTPtr & query, const StorageMetadataPtr & /*metadata_snapshot*/, const Context & context)
{
auto storage = getTargetTable();
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auto lock = storage->lockForShare(context.getCurrentQueryId(), context.getSettingsRef().lock_acquire_timeout);
auto metadata_snapshot = storage->getInMemoryMetadataPtr();
auto stream = storage->write(query, metadata_snapshot, context);
stream->addTableLock(lock);
return stream;
}
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static void executeDropQuery(ASTDropQuery::Kind kind, const Context & global_context, const Context & current_context, const StorageID & target_table_id, bool no_delay)
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{
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if (DatabaseCatalog::instance().tryGetTable(target_table_id, current_context))
{
/// We create and execute `drop` query for internal table.
auto drop_query = std::make_shared<ASTDropQuery>();
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drop_query->database = target_table_id.database_name;
drop_query->table = target_table_id.table_name;
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drop_query->kind = kind;
drop_query->no_delay = no_delay;
drop_query->if_exists = true;
ASTPtr ast_drop_query = drop_query;
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/// FIXME We have to use global context to execute DROP query for inner table
/// to avoid "Not enough privileges" error if current user has only DROP VIEW ON mat_view_name privilege
/// and not allowed to drop inner table explicitly. Allowing to drop inner table without explicit grant
/// looks like expected behaviour and we have tests for it.
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auto drop_context = Context(global_context);
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drop_context.getClientInfo().query_kind = ClientInfo::QueryKind::SECONDARY_QUERY;
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if (auto txn = current_context.getZooKeeperMetadataTransaction())
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{
/// For Replicated database
drop_context.setQueryContext(const_cast<Context &>(current_context));
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drop_context.initZooKeeperMetadataTransaction(txn, true);
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}
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InterpreterDropQuery drop_interpreter(ast_drop_query, drop_context);
drop_interpreter.execute();
}
}
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void StorageMaterializedView::drop()
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{
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auto table_id = getStorageID();
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const auto & select_query = getInMemoryMetadataPtr()->getSelectQuery();
if (!select_query.select_table_id.empty())
DatabaseCatalog::instance().removeDependency(select_query.select_table_id, table_id);
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dropInnerTable(true, global_context);
}
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void StorageMaterializedView::dropInnerTable(bool no_delay, const Context & context)
{
if (has_inner_table && tryGetTargetTable())
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executeDropQuery(ASTDropQuery::Kind::Drop, global_context, context, target_table_id, no_delay);
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}
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void StorageMaterializedView::truncate(const ASTPtr &, const StorageMetadataPtr &, const Context & context, TableExclusiveLockHolder &)
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{
if (has_inner_table)
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executeDropQuery(ASTDropQuery::Kind::Truncate, global_context, context, target_table_id, true);
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}
void StorageMaterializedView::checkStatementCanBeForwarded() const
{
if (!has_inner_table)
throw Exception(
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"MATERIALIZED VIEW targets existing table " + target_table_id.getNameForLogs() + ". "
+ "Execute the statement directly on it.", ErrorCodes::INCORRECT_QUERY);
}
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bool StorageMaterializedView::optimize(
const ASTPtr & query,
const StorageMetadataPtr & /*metadata_snapshot*/,
const ASTPtr & partition,
bool final,
bool deduplicate,
const Names & deduplicate_by_columns,
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const Context & context)
{
checkStatementCanBeForwarded();
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auto storage_ptr = getTargetTable();
auto metadata_snapshot = storage_ptr->getInMemoryMetadataPtr();
return getTargetTable()->optimize(query, metadata_snapshot, partition, final, deduplicate, deduplicate_by_columns, context);
}
void StorageMaterializedView::alter(
const AlterCommands & params,
const Context & context,
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TableLockHolder &)
{
auto table_id = getStorageID();
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StorageInMemoryMetadata new_metadata = getInMemoryMetadata();
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StorageInMemoryMetadata old_metadata = getInMemoryMetadata();
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params.apply(new_metadata, context);
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/// start modify query
if (context.getSettingsRef().allow_experimental_alter_materialized_view_structure)
{
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const auto & new_select = new_metadata.select;
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const auto & old_select = old_metadata.getSelectQuery();
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DatabaseCatalog::instance().updateDependency(old_select.select_table_id, table_id, new_select.select_table_id, table_id);
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new_metadata.setSelectQuery(new_select);
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}
/// end modify query
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DatabaseCatalog::instance().getDatabase(table_id.database_name)->alterTable(context, table_id, new_metadata);
setInMemoryMetadata(new_metadata);
}
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void StorageMaterializedView::checkAlterIsPossible(const AlterCommands & commands, const Settings & settings) const
{
if (settings.allow_experimental_alter_materialized_view_structure)
{
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for (const auto & command : commands)
{
if (!command.isCommentAlter() && command.type != AlterCommand::MODIFY_QUERY)
throw Exception(
"Alter of type '" + alterTypeToString(command.type) + "' is not supported by storage " + getName(),
ErrorCodes::NOT_IMPLEMENTED);
}
}
else
{
for (const auto & command : commands)
{
if (!command.isCommentAlter())
throw Exception(
"Alter of type '" + alterTypeToString(command.type) + "' is not supported by storage " + getName(),
ErrorCodes::NOT_IMPLEMENTED);
}
}
}
void StorageMaterializedView::checkMutationIsPossible(const MutationCommands & commands, const Settings & settings) const
{
checkStatementCanBeForwarded();
getTargetTable()->checkMutationIsPossible(commands, settings);
}
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Pipe StorageMaterializedView::alterPartition(
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const StorageMetadataPtr & metadata_snapshot, const PartitionCommands & commands, const Context & context)
{
checkStatementCanBeForwarded();
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return getTargetTable()->alterPartition(metadata_snapshot, commands, context);
}
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void StorageMaterializedView::checkAlterPartitionIsPossible(
const PartitionCommands & commands, const StorageMetadataPtr & metadata_snapshot, const Settings & settings) const
{
checkStatementCanBeForwarded();
getTargetTable()->checkAlterPartitionIsPossible(commands, metadata_snapshot, settings);
}
void StorageMaterializedView::mutate(const MutationCommands & commands, const Context & context)
{
checkStatementCanBeForwarded();
getTargetTable()->mutate(commands, context);
}
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void StorageMaterializedView::renameInMemory(const StorageID & new_table_id)
{
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auto old_table_id = getStorageID();
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auto metadata_snapshot = getInMemoryMetadataPtr();
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bool from_atomic_to_atomic_database = old_table_id.hasUUID() && new_table_id.hasUUID();
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if (has_inner_table && tryGetTargetTable() && !from_atomic_to_atomic_database)
{
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auto new_target_table_name = generateInnerTableName(new_table_id);
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auto rename = std::make_shared<ASTRenameQuery>();
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ASTRenameQuery::Table from;
from.database = target_table_id.database_name;
from.table = target_table_id.table_name;
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ASTRenameQuery::Table to;
to.database = target_table_id.database_name;
to.table = new_target_table_name;
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ASTRenameQuery::Element elem;
elem.from = from;
elem.to = to;
rename->elements.emplace_back(elem);
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InterpreterRenameQuery(rename, global_context).execute();
target_table_id.table_name = new_target_table_name;
}
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IStorage::renameInMemory(new_table_id);
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const auto & select_query = metadata_snapshot->getSelectQuery();
// TODO Actually we don't need to update dependency if MV has UUID, but then db and table name will be outdated
DatabaseCatalog::instance().updateDependency(select_query.select_table_id, old_table_id, select_query.select_table_id, getStorageID());
}
void StorageMaterializedView::shutdown()
{
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auto metadata_snapshot = getInMemoryMetadataPtr();
const auto & select_query = metadata_snapshot->getSelectQuery();
/// Make sure the dependency is removed after DETACH TABLE
if (!select_query.select_table_id.empty())
DatabaseCatalog::instance().removeDependency(select_query.select_table_id, getStorageID());
}
StoragePtr StorageMaterializedView::getTargetTable() const
{
checkStackSize();
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return DatabaseCatalog::instance().getTable(target_table_id, global_context);
}
StoragePtr StorageMaterializedView::tryGetTargetTable() const
{
checkStackSize();
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return DatabaseCatalog::instance().tryGetTable(target_table_id, global_context);
}
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Strings StorageMaterializedView::getDataPaths() const
{
if (auto table = tryGetTargetTable())
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return table->getDataPaths();
return {};
}
void StorageMaterializedView::checkTableCanBeDropped() const
{
/// Don't drop the target table if it was created manually via 'TO inner_table' statement
if (!has_inner_table)
return;
auto target_table = tryGetTargetTable();
if (!target_table)
return;
target_table->checkTableCanBeDropped();
}
void StorageMaterializedView::checkPartitionCanBeDropped(const ASTPtr & partition)
{
/// Don't drop the partition in target table if it was created manually via 'TO inner_table' statement
if (!has_inner_table)
return;
auto target_table = tryGetTargetTable();
if (!target_table)
return;
target_table->checkPartitionCanBeDropped(partition);
}
ActionLock StorageMaterializedView::getActionLock(StorageActionBlockType type)
{
return has_inner_table ? getTargetTable()->getActionLock(type) : ActionLock{};
}
void registerStorageMaterializedView(StorageFactory & factory)
{
factory.registerStorage("MaterializedView", [](const StorageFactory::Arguments & args)
{
/// Pass local_context here to convey setting for inner table
return StorageMaterializedView::create(
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args.table_id, args.local_context, args.query,
args.columns, args.attach);
});
}
}