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LibSQL: Add a new Result class to replace SQLResult

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The existing SQLResult class predates our TRY semantics. As a result, in
the AST execution methods, there is a lot of is_error checking on values
that could instead be wrapped with TRY. This new class will allow such
semantics, and is also stack allocated (no need to be a RefPtr). It is
heavily based on LibJS's completion class.
This commit is contained in:
Timothy Flynn 2022-02-09 15:55:12 -05:00 • committed by Linus Groh
parent f2fae3a21c
commit d9055de7ea
3 changed files with 136 additions and 0 deletions
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60
Userland/Libraries/LibSQL/SQLResult.cpp
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@ -4,6 +4,7 @@
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/StringBuilder.h>
#include <LibSQL/SQLResult.h>
namespace SQL {
@ -28,4 +29,63 @@ void SQLResult::limit(size_t offset, size_t limit)
}
}
void Result::insert(Tuple const& row, Tuple const& sort_key)
{
if (!m_result_set.has_value())
m_result_set = ResultSet {};
m_result_set->insert_row(row, sort_key);
}
void Result::limit(size_t offset, size_t limit)
{
VERIFY(has_results());
if (offset > 0) {
if (offset > m_result_set->size()) {
m_result_set->clear();
return;
}
m_result_set->remove(0, offset);
}
if (m_result_set->size() > limit)
m_result_set->remove(limit, m_result_set->size() - limit);
}
String Result::error_string() const
{
VERIFY(is_error());
StringView error_code;
StringView error_description;
switch (m_error) {
#undef __ENUMERATE_SQL_ERROR
#define __ENUMERATE_SQL_ERROR(error, description) \
case SQLErrorCode::error: \
error_code = #error##sv; \
error_description = description##sv; \
break;
ENUMERATE_SQL_ERRORS(__ENUMERATE_SQL_ERROR)
#undef __ENUMERATE_SQL_ERROR
default:
VERIFY_NOT_REACHED();
}
StringBuilder builder;
builder.appendff("{}: ", error_code);
if (m_error_message.has_value()) {
if (error_description.find("{}"sv).has_value())
builder.appendff(error_description, *m_error_message);
else
builder.appendff("{}: {}", error_description, *m_error_message);
} else {
builder.append(error_description);
}
return builder.build();
}
}