mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-02 20:42:04 +00:00
114 lines
4.4 KiB
C++
114 lines
4.4 KiB
C++
#include <Interpreters/InterpreterDeleteQuery.h>
|
|
|
|
#include <Access/ContextAccess.h>
|
|
#include <Databases/DatabaseReplicated.h>
|
|
#include <Databases/IDatabase.h>
|
|
#include <Interpreters/Context.h>
|
|
#include <Interpreters/FunctionNameNormalizer.h>
|
|
#include <Interpreters/MutationsInterpreter.h>
|
|
#include <Parsers/ASTDeleteQuery.h>
|
|
#include <Parsers/ASTAssignment.h>
|
|
#include <Parsers/ASTExpressionList.h>
|
|
#include <Storages/AlterCommands.h>
|
|
#include <Storages/IStorage.h>
|
|
#include <Storages/MutationCommands.h>
|
|
#include <Storages/LightweightDeleteDescription.h>
|
|
#include <Storages/MergeTree/MergeTreeData.h>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
namespace ErrorCodes
|
|
{
|
|
extern const int TABLE_IS_READ_ONLY;
|
|
extern const int SUPPORT_IS_DISABLED;
|
|
}
|
|
|
|
|
|
InterpreterDeleteQuery::InterpreterDeleteQuery(const ASTPtr & query_ptr_, ContextPtr context_) : WithContext(context_), query_ptr(query_ptr_)
|
|
{
|
|
}
|
|
|
|
|
|
BlockIO InterpreterDeleteQuery::execute()
|
|
{
|
|
FunctionNameNormalizer().visit(query_ptr.get());
|
|
const ASTDeleteQuery & delete_query = query_ptr->as<ASTDeleteQuery &>();
|
|
auto table_id = getContext()->resolveStorageID(delete_query, Context::ResolveOrdinary);
|
|
|
|
getContext()->checkAccess(AccessType::ALTER_DELETE, table_id);
|
|
|
|
query_ptr->as<ASTDeleteQuery &>().setDatabase(table_id.database_name);
|
|
|
|
/// First check table storage for validations.
|
|
StoragePtr table = DatabaseCatalog::instance().getTable(table_id, getContext());
|
|
checkStorageSupportsTransactionsIfNeeded(table, getContext());
|
|
if (table->isStaticStorage())
|
|
throw Exception(ErrorCodes::TABLE_IS_READ_ONLY, "Table is read-only");
|
|
|
|
DatabasePtr database = DatabaseCatalog::instance().getDatabase(table_id.database_name);
|
|
if (database->shouldReplicateQuery(getContext(), query_ptr))
|
|
{
|
|
auto guard = DatabaseCatalog::instance().getDDLGuard(table_id.database_name, table_id.table_name);
|
|
guard->releaseTableLock();
|
|
return database->tryEnqueueReplicatedDDL(query_ptr, getContext());
|
|
}
|
|
|
|
auto table_lock = table->lockForShare(getContext()->getCurrentQueryId(), getContext()->getSettingsRef().lock_acquire_timeout);
|
|
auto metadata_snapshot = table->getInMemoryMetadataPtr();
|
|
|
|
auto merge_tree = std::dynamic_pointer_cast<MergeTreeData>(table);
|
|
if (!merge_tree)
|
|
{
|
|
/// Convert to MutationCommand
|
|
MutationCommands mutation_commands;
|
|
MutationCommand mut_command;
|
|
|
|
mut_command.type = MutationCommand::Type::DELETE;
|
|
mut_command.predicate = delete_query.predicate;
|
|
|
|
mutation_commands.emplace_back(mut_command);
|
|
|
|
table->checkMutationIsPossible(mutation_commands, getContext()->getSettingsRef());
|
|
MutationsInterpreter(table, metadata_snapshot, mutation_commands, getContext(), false).validate();
|
|
table->mutate(mutation_commands, getContext());
|
|
return {};
|
|
}
|
|
|
|
if (!getContext()->getSettingsRef().allow_experimental_lightweight_delete)
|
|
throw Exception(ErrorCodes::SUPPORT_IS_DISABLED, "Lightweight delete mutate is experimental. Set `allow_experimental_lightweight_delete` setting to enable it");
|
|
|
|
/// Convert to MutationCommand
|
|
MutationCommands mutation_commands;
|
|
MutationCommand mut_command;
|
|
|
|
/// Build "UPDATE _row_exists = 0 WHERE predicate" query
|
|
mut_command.type = MutationCommand::Type::UPDATE;
|
|
mut_command.predicate = delete_query.predicate;
|
|
|
|
auto command = std::make_shared<ASTAlterCommand>();
|
|
command->type = ASTAlterCommand::UPDATE;
|
|
command->predicate = delete_query.predicate;
|
|
command->update_assignments = std::make_shared<ASTExpressionList>();
|
|
auto set_row_does_not_exist = std::make_shared<ASTAssignment>();
|
|
set_row_does_not_exist->column_name = LightweightDeleteDescription::FILTER_COLUMN.name;
|
|
auto zero_value = std::make_shared<ASTLiteral>(DB::Field(UInt8(0)));
|
|
set_row_does_not_exist->children.push_back(zero_value);
|
|
command->update_assignments->children.push_back(set_row_does_not_exist);
|
|
command->children.push_back(command->predicate);
|
|
command->children.push_back(command->update_assignments);
|
|
mut_command.column_to_update_expression[set_row_does_not_exist->column_name] = zero_value;
|
|
mut_command.ast = command->ptr();
|
|
|
|
mutation_commands.emplace_back(mut_command);
|
|
|
|
table->checkMutationIsPossible(mutation_commands, getContext()->getSettingsRef());
|
|
MutationsInterpreter(table, metadata_snapshot, mutation_commands, getContext(), false).validate();
|
|
table->mutate(mutation_commands, getContext());
|
|
|
|
return {};
|
|
}
|
|
|
|
}
|