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44 lines
1.2 KiB
C++
44 lines
1.2 KiB
C++
#include <Storages/StorageNull.h>
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#include <Storages/StorageFactory.h>
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#include <Storages/AlterCommands.h>
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#include <Interpreters/InterpreterAlterQuery.h>
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#include <Databases/IDatabase.h>
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#include <IO/WriteHelpers.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
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}
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void registerStorageNull(StorageFactory & factory)
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{
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factory.registerStorage("Null", [](const StorageFactory::Arguments & args)
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{
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if (!args.engine_args.empty())
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throw Exception(
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"Engine " + args.engine_name + " doesn't support any arguments (" + toString(args.engine_args.size()) + " given)",
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ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
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return StorageNull::create(args.table_name, args.columns);
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});
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}
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void StorageNull::alter(const AlterCommands & params, const String & current_database_name, const String & current_table_name, const Context & context)
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{
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auto lock = lockStructureForAlter();
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ColumnsDescription new_columns = getColumns();
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params.apply(new_columns);
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context.getDatabase(current_database_name)->alterTable(context, current_table_name, new_columns, {});
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setColumns(std::move(new_columns));
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}
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}
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