[Node-DuckDB API](./node-duckdb.md) > [IExecuteOptions](./node-duckdb.iexecuteoptions.md) > [forceMaterialized](./node-duckdb.iexecuteoptions.forcematerialized.md) ## IExecuteOptions.forceMaterialized property Materialized means that the whole result is loaded into memory, as opposed to streaming which means there is a pointer to the next row and rows are retrieved one by one. If falsy, DuckDB will \*attempt\* to not load the whole result set into memory at once. Signature: ```typescript forceMaterialized?: boolean; ```