Method xNext

src/util/custom-table.cpp:231–256

This method advances a virtual table's cursor to the next row. SQLite will call this method repeatedly, driving the generator function.

	// This method advances a virtual table's cursor to the next row.
	// SQLite will call this method repeatedly, driving the generator function.
	static int xNext(sqlite3_vtab_cursor* _cursor) {
		Cursor* cursor = Cursor::Upcast(_cursor);
		CustomTable* self = cursor->GetVTab()->parent;
		Addon* addon = self->addon;
		Napi::Env env = self->env;
		Napi::HandleScope scope(env);

		Napi::Object iterator = cursor->iterator.Value();
		Napi::Function next = cursor->next.Value();

		Napi::Value maybeRecord = SafeCall(env, next, iterator, 0, NULL);
		if (env.IsExceptionPending()) {
			self->PropagateJSError();
			return SQLITE_ERROR;
		}

		Napi::Object record = maybeRecord.As<Napi::Object>();
		bool done = record.Get(addon->cs.done.Value()).As<Napi::Boolean>().Value();
		if (!done) {
			cursor->row.Reset(record.Get(addon->cs.value.Value()).As<Napi::Array>(), 1);
		}
		cursor->done = done;
		cursor->rowid += 1;

		return SQLITE_OK;
	}

	// If this method returns 1, SQLite will stop scanning the virtual table.
	static int xEof(sqlite3_vtab_cursor* cursor) {