Generate a series of single days from a table of intervals. - Mailing list pgsql-novice

Hi all,


I have a table of date intervals (see below for DDL and DML) with a
status of 1 for those periods. Dates outside of these intervals
need a status of 0.

I wish to generate a series of dates from these intervals and
also to generate the intervening dates with a status of 0 (say
in this example for the month of April - the outying date parameters
should be arbitrary - maybe 1 month, maybe three.

So, take the example first record (of the three sample records) below,

The output I need is:

date_val       status

2016-04-01       0
2016-04-02       1
2016-04-03       1
2016-04-04       1
2016-04-05       1
2016-04-06       0
2016-04-02       0
..
..<status as appropriate for the rest of the month>
..
2016-04-30       0


I would like to do this using a recursive CTE if it's the best solution,
but I'm open to other approaches - different approaches appreciated.


Please let me know if you require any further information.


TIA and rgs,


Paul...



CREATE TABLE testdate (datein date, dateout date, status int);

INSERT  INTO testdate VALUES ('2016-04-02', '2016-04-05', 1);
INSERT  INTO testdate VALUES ('2016-04-15', '2016-04-18', 1);
INSERT  INTO testdate VALUES ('2016-04-25', '2016-04-30', 1);