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SQLServer: Parse SQL a single time to actually "prepare" the statement

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One of the benefits of prepared statements is that the SQL string is
parsed just once and re-used. This updates SQLStatement to do just that
and store the parsed result.
This commit is contained in:
Timothy Flynn 2022-12-02 08:04:05 -05:00 • committed by Andreas Kling
parent 83bb25611e
commit b13527b8b2
5 changed files with 40 additions and 39 deletions
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11
Userland/Services/SQLServer/SQLStatement.h
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@ -18,28 +18,27 @@
namespace SQLServer {
class SQLStatement final : public Core::Object {
C_OBJECT(SQLStatement)
C_OBJECT_ABSTRACT(SQLStatement)
public:
static SQL::ResultOr<NonnullRefPtr<SQLStatement>> create(DatabaseConnection&, StringView sql);
~SQLStatement() override = default;
static RefPtr<SQLStatement> statement_for(int statement_id);
int statement_id() const { return m_statement_id; }
DeprecatedString const& sql() const { return m_sql; }
DatabaseConnection* connection() { return dynamic_cast<DatabaseConnection*>(parent()); }
void execute();
private:
SQLStatement(DatabaseConnection&, DeprecatedString sql);
SQL::ResultOr<void> parse();
SQLStatement(DatabaseConnection&, NonnullRefPtr<SQL::AST::Statement> statement);
bool should_send_result_rows() const;
void next();
void report_error(SQL::Result);
int m_statement_id;
DeprecatedString m_sql;
size_t m_index { 0 };
RefPtr<SQL::AST::Statement> m_statement { nullptr };
NonnullRefPtr<SQL::AST::Statement> m_statement;
Optional<SQL::ResultSet> m_result {};
};