LibSQL+SQLServer+SQLStudio+sql: Allocate per-statement-execution IDs

In order to execute a prepared statement multiple times, and track each
execution's results, clients will need to be provided an execution ID.
This will create a monotonically increasing ID each time a prepared
statement is executed for this purpose.

1 files changed, 7 insertions, 3 deletions

diff --git a/Userland/Services/SQLServer/SQLStatement.h b/Userland/Services/SQLServer/SQLStatement.h
index 19e97d0718..7bdf95c910 100644
--- a/Userland/Services/SQLServer/SQLStatement.h
+++ b/Userland/Services/SQLServer/SQLStatement.h
@@ -28,17 +28,21 @@ public:
     static RefPtr<SQLStatement> statement_for(u64 statement_id);
     u64 statement_id() const { return m_statement_id; }
     DatabaseConnection* connection() { return dynamic_cast<DatabaseConnection*>(parent()); }
-    void execute(Vector<SQL::Value> placeholder_values);
+    Optional<u64> execute(Vector<SQL::Value> placeholder_values);
 
 private:
     SQLStatement(DatabaseConnection&, NonnullRefPtr<SQL::AST::Statement> statement);
 
     bool should_send_result_rows() const;
-    void next();
-    void report_error(SQL::Result);
+    void next(u64 execution_id);
+    void report_error(SQL::Result, u64 execution_id);
 
     u64 m_statement_id { 0 };
     size_t m_index { 0 };
+
+    HashTable<u64> m_ongoing_executions;
+    u64 m_next_execution_id { 0 };
+
     NonnullRefPtr<SQL::AST::Statement> m_statement;
     Optional<SQL::ResultSet> m_result {};
 };