week function in teiid not returning expected value

One of our users of our teiid instance as reported that the week function (to determine which week of the year it is) operates in teiid a little different to how they expect.

Teiid resets the week count to 1 on every 1st of January even though
the day is not the 1st day of the week (Sunday in here).
But Postgres will only resets the week count to 1 only on the 1st Monday
of the year.

The examples below compare the results return by teiid and Postgres:

# Teiid result:

EngVDBR=> select week(parsedate('2011-01-01', 'yyyy-MM-dd')) AS Week;
week
------
1
(1 row)

EngVDBR=> select week(parsedate('2011-01-02', 'yyyy-MM-dd')) AS Week;
week
------
2
(1 row)

# Postgres result:

postgres=> SELECT EXTRACT(WEEK FROM DATE '2011-01-01') AS Week;
week
------
52
(1 row)


postgres=> SELECT EXTRACT(WEEK FROM DATE '2011-01-03') AS Week;
week
------
1
(1 row)