Обсуждение: Recurring bookings

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Recurring bookings

От
Kevin Waterson
Дата:
So far this is what I have.. (see below).
How can I have recurring bookings for a call?
Eg: if the call_frequency is weekly, how can I see a list of dates which this account will be called upon?

Kind regards
Kevin


CREATE TABLE call_frequency (
        id SERIAL PRIMARY KEY NOT NULL,
        name varchar(25) NOT NULL,
        description VARCHAR(200) NOT NULL
);
COMMENT ON TABLE call_frequency IS 'How often a call is scheduled';
INSERT INTO call_frequency( name, description ) VALUES ('Once Only', 'Single non-recurring call' );
INSERT INTO call_frequency( name, description ) VALUES ('Hourly', 'Every hour' );
INSERT INTO call_frequency( name, description ) VALUES ('Daily', 'Every day' );
INSERT INTO call_frequency( name, description ) VALUES ('Weekly', 'Every week' );
INSERT INTO call_frequency( name, description ) VALUES ('Bi-Weekly', 'Every second week' );
INSERT INTO call_frequency( name, description ) VALUES ('Monthly', 'Every Month' );
INSERT INTO call_frequency( name, description ) VALUES ('Yearly', 'Every Year' );


CREATE TABLE callcard (
        id SERIAL PRIMARY KEY NOT NULL,
        account_id INT NOT NULL REFERENCES accounts(id),
        user_id INT NOT NULL REFERENCES users(id),
        call_type_id INT NOT NULL REFERENCES call_types(id),
        call_frequency_id INT NOT NULL REFERENCES call_frequency(id),
        duration TSRANGE NOT NULL
);
COMMENT ON TABLE callcard IS 'Table of scheduled calls';



Re: Recurring bookings

От
John R Pierce
Дата:
On 1/21/2016 2:05 AM, Kevin Waterson wrote:
> So far this is what I have.. (see below).
> How can I have recurring bookings for a call?
> Eg: if the call_frequency is weekly, how can I see a list of dates
> which this account will be called upon?
>

your call frequency table probably should have a field interval_length
of type INTERVAL with values like INTERVAL '1 week'

then you could do something like select start_date +
interval_length*int_num from call_frequency join generate_series(1,n) as
int_num where call_frequency.id = ?;


--
john r pierce, recycling bits in santa cruz

Re: Recurring bookings

От
cpolish@surewest.net
Дата:
On 2016-01-21 02:15, John R Pierce wrote:
> >How can I have recurring bookings for a call?
> >Eg: if the call_frequency is weekly, how can I see a list of dates which
> >this account will be called upon?
I recommend "Developing time-oriented database applications in SQL",
Richard T. Snodgrass, ISBN 1-55860-426-7, might save you a lot of
time and trouble.

Best regards,
--
Charles Polisher