public void setType(String table, String column, Type<?> type) {
        Map<String, Type<?>> columns = typeByColumn.computeIfAbsent(table, k -> new HashMap<String, Type<?>>());
        columns.put(column, type);
    }
{@code JavaTypeMapping} provides a mapping from Class to Type instances

@author tiwe
querydsl-sql/src/main/java/com/querydsl/sql/JavaTypeMapping.java