jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2021, Mahmoud Mandour <ma.mandourr@gmail.com>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include <LibSQL/AST/AST.h>
8#include <LibSQL/Database.h>
9#include <LibSQL/Meta.h>
10#include <LibSQL/ResultSet.h>
11#include <LibSQL/Row.h>
12
13namespace SQL::AST {
14
15ResultOr<ResultSet> DescribeTable::execute(ExecutionContext& context) const
16{
17 auto const& schema_name = m_qualified_table_name->schema_name();
18 auto const& table_name = m_qualified_table_name->table_name();
19 auto table_def = TRY(context.database->get_table(schema_name, table_name));
20
21 auto describe_table_def = MUST(context.database->get_table("master"sv, "internal_describe_table"sv));
22 auto descriptor = describe_table_def->to_tuple_descriptor();
23
24 ResultSet result { SQLCommand::Describe };
25 TRY(result.try_ensure_capacity(table_def->columns().size()));
26
27 for (auto& column : table_def->columns()) {
28 Tuple tuple(descriptor);
29 tuple[0] = column->name();
30 tuple[1] = SQLType_name(column->type());
31
32 result.insert_row(tuple, Tuple {});
33 }
34
35 return result;
36}
37
38}