Re: Add generate_series(numeric, numeric)

Oops, it seems that I have been too hasty here. With a fresh mind I looked at my own patch again and found two bugs:

- Incorrect initialization of step variable with const_one

- Incorrect calculation of each step's value, making stuff crash, it is necessary to switch to the context of the function to perform operations on a temporary variable first.

Platon (am I writing your name correctly??), feel free to pick up the attached version, it works for me:
=# SELECT * FROM generate_series(0.8, -4, -0.7);
 generate_series
-----------------
             0.8
             0.1
            -0.6
            -1.3
            -2.0
            -2.7
            -3.4
(7 rows)
=# SELECT * FROM generate_series(0.8, 5, 1.2);
 generate_series
-----------------
             0.8
             2.0
             3.2
             4.4
(4 rows)
=# SELECT * FROM generate_series(0.8, 5);
 generate_series
-----------------
             0.8
             1.8
             2.8
             3.8
             4.8
(5 rows)
=# SELECT * FROM generate_series(0.8, 5, 0);
ERROR:  22023: step size cannot equal zero
LOCATION:  generate_series_numeric, numeric.c:1271

This could be polished more, but I'm sure you'll deal with that well. If you are able to have a more accompished version for the next commit fest I'll have a look at it.
Regards,

--
Michael