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LibSQL: Do not crash when SELECTing from an empty table

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The crash was caused by getting the first element of an empty vector.
This commit is contained in:
Timothy Flynn 2022-02-09 17:10:08 -05:00 • committed by Linus Groh
parent 373b467302
commit f1f0770d68
2 changed files with 13 additions and 2 deletions
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4
Userland/Libraries/LibSQL/AST/Select.cpp
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@ -69,8 +69,8 @@ Result Select::execute(ExecutionContext& context) const
auto old_descriptor_size = descriptor->size();
descriptor->extend(table_def->to_tuple_descriptor());
for (auto cartesian_row = rows.first(); cartesian_row.size() == old_descriptor_size; cartesian_row = rows.first()) {
rows.remove(0);
while (!rows.is_empty() && (rows.first().size() == old_descriptor_size)) {
auto cartesian_row = rows.take_first();
auto table_rows = TRY(context.database->select_all(*table_def));
for (auto& table_row : table_rows) {