Parametrized SQL queries for PostgreSQL?

Hi, I use Database Toolbox to fetch data from a Postgres database.

Is it possible to parametrize SQL query when using fetch?

conn = postgresql(...);

col4 = "foobar";

query = ...
    "SELECT s.col1, s.col2, s.col3  " + ...
    "FROM mystuff s " + ...
    "WHERE s.col4 = '" + col4 + "'";

fetch_opts = databaseImportOptions(conn, query);

results = fetch(conn, query, fetch_opts);

close(conn);
clear conn query fetch_opts;

Is there a way to declare the col4 as a query parameter istead of concatenating the value into query string?