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#include <Access/ContextAccess.h>
#include <Databases/DatabaseReplicated.h>
#include <Interpreters/Context.h>
#include <Interpreters/InterpreterDropIndexQuery.h>
#include <Interpreters/executeDDLQueryOnCluster.h>
#include <Parsers/ASTDropIndexQuery.h>
#include <Parsers/ASTIdentifier.h>
#include <Storages/AlterCommands.h>
namespace DB
{
namespace ErrorCodes
{
extern const int TABLE_IS_READ_ONLY;
}
BlockIO InterpreterDropIndexQuery::execute()
{
auto current_context = getContext();
const auto & drop_index = query_ptr->as<ASTDropIndexQuery &>();
AccessRightsElements required_access;
required_access.emplace_back(AccessType::ALTER_DROP_INDEX, drop_index.getDatabase(), drop_index.getTable());
if (!drop_index.cluster.empty())
{
DDLQueryOnClusterParams params;
params.access_to_check = std::move(required_access);
return executeDDLQueryOnCluster(query_ptr, current_context, params);
}
current_context->checkAccess(required_access);
auto table_id = current_context->resolveStorageID(drop_index, Context::ResolveOrdinary);
query_ptr->as<ASTDropIndexQuery &>().setDatabase(table_id.database_name);
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, current_context);
}
StoragePtr table = DatabaseCatalog::instance().getTable(table_id, current_context);
if (table->isStaticStorage())
throw Exception(ErrorCodes::TABLE_IS_READ_ONLY, "Table is read-only");
/// Convert ASTDropIndexQuery to AlterCommand.
AlterCommands alter_commands;
AlterCommand command;
command.ast = drop_index.convertToASTAlterCommand();
command.type = AlterCommand::DROP_INDEX;
command.index_name = drop_index.index_name->as<ASTIdentifier &>().name();
command.if_exists = drop_index.if_exists;
alter_commands.emplace_back(std::move(command));
auto alter_lock = table->lockForAlter(current_context->getSettingsRef().lock_acquire_timeout);
StorageInMemoryMetadata metadata = table->getInMemoryMetadata();
alter_commands.validate(table, current_context);
alter_commands.prepare(metadata);
table->checkAlterIsPossible(alter_commands, current_context);
table->alter(alter_commands, current_context, alter_lock);
return {};
}
}
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