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50 lines
1.5 KiB
C++
50 lines
1.5 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.database_name, args.table_name, args.columns, args.constraints);
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});
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}
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void StorageNull::alter(
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const AlterCommands & params, const Context & context, TableStructureWriteLockHolder & table_lock_holder)
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{
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lockStructureExclusively(table_lock_holder, context.getCurrentQueryId());
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const String current_database_name = getDatabaseName();
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const String current_table_name = getTableName();
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ColumnsDescription new_columns = getColumns();
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IndicesDescription new_indices = getIndices();
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ConstraintsDescription new_constraints = getConstraints();
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params.applyForColumnsOnly(new_columns);
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context.getDatabase(current_database_name)->alterTable(context, current_table_name, new_columns, new_indices, new_constraints, {});
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setColumns(std::move(new_columns));
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}
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}
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