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LibSQL: Partially implement the DELETE command

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This implements enough to delete rows filtered by a WHERE clause.
This commit is contained in:
Timothy Flynn 2022-11-28 07:49:03 -05:00 • committed by Linus Groh
parent 6d3f68cc11
commit aba7f11a50
6 changed files with 190 additions and 0 deletions
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118
Tests/LibSQL/TestSqlStatementExecution.cpp
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@ -768,4 +768,122 @@ TEST_CASE(describe_large_table_after_persist)
}
}
TEST_CASE(delete_single_row)
{
ScopeGuard guard([]() { unlink(db_name); });
{
auto database = SQL::Database::construct(db_name);
EXPECT(!database->open().is_error());
create_table(database);
for (auto count = 0; count < 10; ++count) {
auto result = execute(database, String::formatted("INSERT INTO TestSchema.TestTable VALUES ( 'T{}', {} );", count, count));
EXPECT_EQ(result.size(), 1u);
}
auto result = execute(database, "SELECT * FROM TestSchema.TestTable;");
EXPECT_EQ(result.size(), 10u);
}
{
auto database = SQL::Database::construct(db_name);
EXPECT(!database->open().is_error());
execute(database, "DELETE FROM TestSchema.TestTable WHERE (IntColumn = 4);");
auto result = execute(database, "SELECT IntColumn FROM TestSchema.TestTable ORDER BY IntColumn;");
EXPECT_EQ(result.size(), 9u);
for (auto i = 0u; i < 4; ++i)
EXPECT_EQ(result[i].row[0], i);
for (auto i = 5u; i < 9; ++i)
EXPECT_EQ(result[i].row[0], i + 1);
}
{
auto database = SQL::Database::construct(db_name);
EXPECT(!database->open().is_error());
auto result = execute(database, "SELECT IntColumn FROM TestSchema.TestTable ORDER BY IntColumn;");
EXPECT_EQ(result.size(), 9u);
for (auto i = 0u; i < 4; ++i)
EXPECT_EQ(result[i].row[0], i);
for (auto i = 5u; i < 9; ++i)
EXPECT_EQ(result[i].row[0], i + 1);
}
}
TEST_CASE(delete_multiple_rows)
{
ScopeGuard guard([]() { unlink(db_name); });
{
auto database = SQL::Database::construct(db_name);
EXPECT(!database->open().is_error());
create_table(database);
for (auto count = 0; count < 10; ++count) {
auto result = execute(database, String::formatted("INSERT INTO TestSchema.TestTable VALUES ( 'T{}', {} );", count, count));
EXPECT_EQ(result.size(), 1u);
}
auto result = execute(database, "SELECT * FROM TestSchema.TestTable;");
EXPECT_EQ(result.size(), 10u);
}
{
auto database = SQL::Database::construct(db_name);
EXPECT(!database->open().is_error());
execute(database, "DELETE FROM TestSchema.TestTable WHERE (IntColumn >= 4);");
auto result = execute(database, "SELECT IntColumn FROM TestSchema.TestTable ORDER BY IntColumn;");
EXPECT_EQ(result.size(), 4u);
for (auto i = 0u; i < result.size(); ++i)
EXPECT_EQ(result[i].row[0], i);
}
{
auto database = SQL::Database::construct(db_name);
EXPECT(!database->open().is_error());
auto result = execute(database, "SELECT IntColumn FROM TestSchema.TestTable ORDER BY IntColumn;");
EXPECT_EQ(result.size(), 4u);
for (auto i = 0u; i < result.size(); ++i)
EXPECT_EQ(result[i].row[0], i);
}
}
TEST_CASE(delete_all_rows)
{
ScopeGuard guard([]() { unlink(db_name); });
{
auto database = SQL::Database::construct(db_name);
EXPECT(!database->open().is_error());
create_table(database);
for (auto count = 0; count < 10; ++count) {
auto result = execute(database, String::formatted("INSERT INTO TestSchema.TestTable VALUES ( 'T{}', {} );", count, count));
EXPECT_EQ(result.size(), 1u);
}
auto result = execute(database, "SELECT * FROM TestSchema.TestTable;");
EXPECT_EQ(result.size(), 10u);
}
{
auto database = SQL::Database::construct(db_name);
EXPECT(!database->open().is_error());
execute(database, "DELETE FROM TestSchema.TestTable;");
auto result = execute(database, "SELECT * FROM TestSchema.TestTable;");
EXPECT(result.is_empty());
}
{
auto database = SQL::Database::construct(db_name);
EXPECT(!database->open().is_error());
auto result = execute(database, "SELECT * FROM TestSchema.TestTable;");
EXPECT(result.is_empty());
}
}
}