0 - 1 of 1 tags for instance count

In TPT apply clause, you can specify number of instances used for each operator. For example

APPLY ('INSERT INTO TARGET TABLE (COL1, COL2) VALUES (:COL1, :COL2);') IGNORE DUPLICATE ROWS TO OPERATOR ( LOAD_OPERATOR[2])
SELECT * FROM OPERATOR(READ_OPERATOR[3]);

In this sample, my load_operator is a update operator, while read_operator is DATACONNECTOR PRODUCER hook up to a single file.

specifying the instance on the loader and reader makes me wondering what will happen in reality: