I have a number range defined in my database to retrieve order numbers. Every two years, the numbers should be reset to start again with 1.
So I created the following Quartz Cron expression '0 0 0 1 1 ? */2' using cron-utils (https://github.com/jmrozanec/cron-utils) to do the reset every two years on Jan, 1st.
This will be parsed correctly.
The problem now is, that I'm not able to create an EJB TimerService with that expression, because
the '?' character is not supported and
year doesn't support values of types INCREMENT.
So how to achieve this?
I am running my application on WildFly 23 using JDK11.
While I am not at all convinced of this design, if you expect that your code will last 10 years, how about something like:
0 0 0 1 1 ? 2023,2025,2027,2029,2031,2033
That would let you retire with your code working 10 more years. If you need it to run longer then add a few more years. The ? is supported according to the Quartz docs.
Related
I'm trying to figure out the number of working days between two dates. The table (dfDates) is laid out as follows:
Key
StartDateKey
EndDateKey
1
20171227
20180104
2
20171227
20171229
I have another table (dfDimDate) with all the relevant date keys and whether the date key is a working day or not:
DateKey
WorkDayFlag
20171227
1
20171228
1
20171229
1
20171230
0
20171231
0
20180101
0
20180102
1
20180103
1
20180104
1
I'm expecting a result as so:
Key
WorkingDays
1
6
2
3
So far (I realise this isn't complete to get me the above result), I've written this:
workingdays = []
for i in range(0, len(dfDates)):
value = dfDimDate.filter((dfDimDate.DateKey >= dfDates.collect()[i][1]) & (dfDimDate.DateKey <= df.collect()[i][2])).agg({'WorkDayFlag': 'sum'})
workingdays.append(value.collect())
However, only null values are being returned. Also, I've noticed this is very slow and took 54 seconds before it errored.
I think I understand what the error is about but I'm not sure how to fix it. Also, I'm not sure how to optimise the command so it runs faster. I'm looking for a solution in pyspark or spark SQL (whichever is easiest).
Many thanks,
Carolina
Edit: The error below was resolved thanks to a suggestion from #samkart who said to put the agg after the filter
AnalysisException: Resolved attribute(s) DateKey#17075 missing from sum(WorkDayFlag)#22142L in operator !Filter ((DateKey#17075 <= 20171228) AND (DateKey#17075 >= 20171227)).;
A possible and simple solution:
from pyspark.sql import functions as F
dfDates \
.join(dfDimDate, dfDimDate.DateKey.between(dfDates.StartDateKey, dfDates.EndDateKey)) \
.groupBy(dfDates.Key) \
.agg(F.sum(dfDimDate.WorkDayFlag).alias('WorkingDays'))
That is, first join the two datasets in order to link each date with all the dimDate rows in its range (dfDates.StartDateKey <= dfDimDate.DateKey <= dfDates.EndDateKey).
Then simply group the joined dataset by the date key and count the number of working days in its range.
In the solution you proposed, you are performing the calculation directly on the driver, so you are not taking advantage of the parallelism that spark offers. This should be avoided when possible, especially for large datasets.
Apart from that, you are requesting repeated collects in the for-loop, even for the same data, resulting in a further slowdown.
I've got a logic app that runs every 15 minutes. I'd like to make it only run every 15 minutes between the hours of 8 AM and 4 PM, but I'm unable to figure out how to go about that.
My understanding thus far is that I can't add that condition to the Recurrence, which is set to 15 minutes, and that I'll probably have to make it so that every 15 minutes, if time is between 8 AM and 4 PM, do x... but I'm still struggling to figure out if I ought to be using the "Get current time" feature and using a conditional comparator - if this is the case, how do I make the comparison?
Thanks in advance!
I think you achieve it in using Recurrence trigger itself. As shown below I have it for every 5 minutes on Monday to Friday between 8 am to 7 pm
You can also go through this documentation for any additional details
I am trying to make scheduled job using apex code that will run everyday at same time ex. 00:00. According to documentations I need to use slash '/' for increment. So, the string will look something like this:
0 0 * /1 * ?
But, when I execute this string, the scheduled job is executed every hour. Does anyone have this kind of issue before?
You can use the following expression to run the scheduled job daily.
0 0 1 * * ?
This will run the scheduled job everyday at 1:00AM.
Here is how you read the above expression
0 = Second
0 = Minute
1 = Hour
* = All days
* = All months
? = No specific value
And, I have omitted the optional year part from expression.
Also, you are confusing the / which serves completely different purpose.
Docs for: /
Specifies increments. The number before the slash specifies when the intervals will begin, and the number after the slash is the interval amount. For example, if you specify 1/5 for Day_of_month, the Apex class runs every fifth day of the month, starting on the first of the month.
This question already has answers here:
Trying to find vehicles which are free between 2 variable dates
(2 answers)
Closed 8 years ago.
So I am kind of stuck on this Query I need to do, I have no Idea what It even means.
I need to be able to find a vehicle number from a table entitled Vehicle_Details and check whether it is currently in use for the period Of time I would like to use it as said bellow.
When a new trip is being arranged, the administrator has to find a vehicle that is not already in use for the trip duration. Because this query will be needed frequently, it is important that it can be run easily for an arbitrary start and end date. It should therefore use substitution variables so that the trip start and end dates can be provided at run time.
Make sure that when it is run the user is only prompted to supply the start and end dates once. Also make sure that any vehicles displayed are available for the entire period specified - you will have to include more than one test in the where clause
Any code would be helpful but even links to things that can help me write it myself as I have No idea tbh.
Example data from the three tables:
Trip_ID Departure Return_Date Duration Registration
73180 07-FEB-12 08-FEB-12 1 PY09 XRH
73181 07-FEB-12 08-FEB-12 1 PY10 OPM
73182 07-FEB-12 10-FEB-12 3 PY56 BZT
73183 07-FEB-12 08-FEB-12 1 PY56 BZU
73184 07-FEB-12 09-FEB-12 2 PY58 UHF
Registration Make Model Year
4585 AW ALBION RIEVER 1963
SDU 567M ATKINSON N/A 1974
P525 CAO DAF FT85.400 1996
PY55 CGO DAF FTGCF85.430 2005
PY06 BYP DAF FTGCF85.430 2006
Weight Registration Body Vehicle ID
20321 4585 AW N/A 1
32520 SDU 567M N/A 2
40000 P525 CAO N/A 3
40000 PY55 CGO N/A 4
40000 PY06 BYP N/A 5
You need to find if a particular date range intersects with any reservation. This is interval intersection arithmetic. Consider the following intervals [A,B] and [x,y]:
-----------[xxxxxxxxxxx]-------------
A B
---------------------[xxxxxx]--------
x y
An interval [x,y] will intersect with [A,B] if and only if:
B >= x
And A <= y
So your query will look like:
SELECT *
FROM registrations reg
WHERE reg.registration = :searched_vehicle
AND NOT EXISTS (SELECT NULL
FROM reservations res
WHERE res.registration = reg.registration
AND res.return_date >= :interval_start
AND res.departure <= :interval_end)
This is for one vehicle. If the query returns a row, this vehicle is available for the given interval [:interval_start, :interval_end].
I'm building a report of case results with a parent-child grouping on the row group and single column grouping:
Parent Row Group: Location
Child Row Group: Result
Column Group: Month
Running across the report are months in the year, and running down the report are the location and the different result breakdowns for the location in the given month. Looks something like this:
Jan Feb Total
% # % # % #
Main Office
Pass ? 5 ? 6 55% 11
Fail ? 5 ? 4 45% 9
Total 10 10 20
Other Office
Pass ? 3 ? 2 25% 5
Fail ? 7 ? 8 75% 15
Total 10 10 20
I have everything working except for the percentage breakdowns as indicated by the question marks above. I can't seem to get that total (the 10 for each month/location set above) reflected into my expression caclulation. Any ideas on how to setup my groups and variables to properly render these percentages?
Here's my attempts so far:
Count(Fields!Result.Value, "dsResults") = 40
Count(Fields!Result.Value, "LocationRowGroup") = 20
Count(Fields!Result.Value, "ResultRowGroup") = 11 - (for the Main Office/January/Pass cell, which is the total for the whole year for that result)
Count(Fields!Result.Value, "MonthColumnGroup") = 20
SSRS gets the count correct on the total line right, so there must be a way to reproduce that scope within the data cells?
I sometimes work around annoying SSRS scope issues by pre-calculating my totals, subtotals and percentages. Take a look at this response (to a different post) for an example. I know it is unsatisfying, but it works: pre-calc values suggestion