In INFORMATION_SCHEMA.SYSTEM_PROPERTIES there are these 3 entries that I can't find anything on in the docs:
hsqldb.min_reuse
sql.compare_in_locale
textdb.lvs
Any pointers?
These are among the properties that can be used in the connection URL when a new HSQLDB database is created.
The textdb.lvs property is a legacy property from version 1.8 and has no effect in recent versions.
The sql.compare_in_locale=true property setting uses the language of the Java runtime Locale as the default collation.
The hsqldb.min_reuse setting can be used to specify the smallest row space that is recovered and reused immediately when the row is deleted from a CACHED table. This property can be used in conjunction with the Table Space feature. With a large value such as hsqldb.min_reuse=4096, the deleted spaces are not immediately reused but when they add up and a whole block becomes free, the block as a whole is reused.
Related
I have a csv files, that it has the following structure.
ERP,J,JACKSON,8388 SOUTH CALIFORNIA ST.,TUCSON,AZ,85708,267-3352,,ALLENTON,MI,48002,810,710-0470,369-98-6555,462-11-4610,1953-05-00,F,
MARKETING,J,JACKSON,8388 SOUTH CALIFORNIA ST.,TUCSON,AZ,85708,267-3352,,ALLENTON,MI,48002,810,710-0470,369-98-6555,462-11-4610,1953-05-00,F,
As you can see there is not header, but for your information the first part (first column) represents the sector where are getting the data.
What I have to do is depending on the first column value, for example (MARKETING or ERP) I have to send all that rows to a different output directory.
For example, all rows with ERP to /output/ERP/
all rows with MARKETING to /output/marketing/
I have an idea about how to do it, but my problem is about the RouteOnAttribute processor I am using, I don't know how to refer to the first column and to indicate what is the value (ERP or MARKETING) to later on send it to the correct output directory.
Here is my schema.
Thanks.
Use PartitionRecord processor for this case.
Configure the processor with record reader/writer controller services. Even though if you are not having header you can use col1,col2...etc in avro schema.
add new property that defines processor to use that field for partition the flowfile.
Now partition record processor adds the partition field attribute with value, by making use of this attribute value we can dynamically store files into respected directories dynamically.
Flow:
1.GetFile
2.PartitionRecord
3.PutFile //configure directory as /output/${<keep_partition_field_name_here>}
Please refer this link for configuring usage of partition record processor.
(or)
Old Approach:
Using RouteText processor instead of SplitText + RouteOnAttribute Processors
Configure RouteText processor as
Use the ERP/MARKETING connections connect to PutFile processor and use RouteText.Route attribute value to dynamically save the files into Directories.
Flow:
1.GetFile
2.RouteText
3.PutFile //configure directory as /output/${RouteText.Route}/
You can also use Group Regular expression property value to create partitions.
Note
Using PartitionRecord processor will be more efficient than RouteText processor.
Some functionality in a big project is broken on the development system.
Pretty sure it worked a few hours ago.
How do I know, which ABAP objects have been changed lately?
(I think I can guess the transport and the package that contains the change if that helps)
The nearest answer that I found is table VRSD.
It contains the date of the version of an object.
This doesn't help, since you need to export the transport or create a manual version to get an entry in this table.
So which objects have been changed without creating a new version?
(Yes we will find the change with functional checks, but knowing the changed objects would be a nice shortcut)
For code - table TRDIR has a changed on date that updates when code is activated.
For data dictionary objects check the DD* tables. I know DD01L is domains and DD02L is tables. Both of these will have a change date. I'm sure there are others for the other data types.
There is also the table REPOLOAD which contains the ABAP byte code. There are 3 fields UDAT, UTIME and UNAME for date, time and user who did the last generation (PS: don't be confused by SDAT and STIME fields).
I have two Tables:
Articles(artID, artContents, artPublishDate, artCategoryID, publisherID).
ArticleUpdated(upArtID, upArtContents, upArtEditedData, upArtPublishDate, upArtCategory, upArtOriginalArticleID, upPublisherID)
A user logging in to the application and update an article's
contents at (artContents) column. I want to know about:
Which Changes the user made to the article's contents?
I want to store both versions of the Article, Original version and Edited Version!
What should I do for doing above two task:
Any necessary changes into the tables?
The query for getting exact edited data of (artContents).
(The exact edited data means, that there may 5000 characters in the coloumns, the user may edit 200 characters in the middle or somewhere else in column's characters, I want exact those edited characters, before of edit and after of edit)
Note: I am using ASP.NET with C# for Developing
You are not going to be able to do the exact editing using SQL. You need an algorithm such as the Unix diff on files (which works on the line level). At the character level, the algorithm would be some variation of Levenshtein distance. If diff meets your needs, you could download it, write a stored-procedure to call it, and then use it in the database. This would be rather expensive.
The part of your question of maintaining the different versions is much easier. I would add two colmnns EffDate and EndDate onto each record. You can get the most recent version by looking for EndDate is NULL and find the version active at any given time. Merge is generally useful for maintaining such a table.
Basically this type for requirement needs custom logging.
The example what you have provided i.e. "The exact edited data means, that there may 5000 characters in the coloumns, the user may edit 200 characters in the middle or somewhere else in column's characters, I want exact those edited characters, before of edit and after of edit"
Can have a case that user updates particular words from different place from the text.
You can use http://nlog-project.org/ for logging, its a fast and robust tool that normally we use for doing .net logging.
Also you can take a look
http://www.codeproject.com/Articles/38756/Two-Simple-Approaches-to-WinForms-Dirty-Tracking
Asp.net Event for change tracking of entities
What would be the best way to implement change tracking on an object
Above urls will clear some air, on how to do it.
You would obviously need to track down and store every change.
Out of the blue, i am getting this error when doing a number of updates using nhibernate.
Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [MyDomainObject]
there is no additional information in the error. Is there some recommended way to help identify the root issue or can someone give me a better explanation on what this error indicated or is a sympton around.
Some additional info
I looked at the object and all of the data looks fine, it has an ID, etc . .
Note this is running in a single call stack from an asp.net-mvc website so i wouldn't expect there to be any threading issues to worry about in terms of concurrency.
NHibernate has an object, let's call it theObject. theObject.Id has a value of 42. NHibernate notices that the object is dirty. The object's Id is different than the unsaved-value, which is zero (0) for integer primary keys. So NHibernate issues an update statement, but no rows are updated, which means that there is no row in the database for that type of object with an Id of 42. So the object has been deleted without NHibernate knowing about it. This could happen inside another transaction (e.g. you have threading issues) or if someone (or another application) deleted/altered the row using SQL directly against the database.
The other possibility is that your unsaved-value is wrong. e.g. You are using -1 to indicate an unsaved-entity, but your mapping has a unsaved-value of zero. This is unlikely as your application is generally working from the sounds of it. If the unsaved-value was wrong, you wouldn't have been able to save any entities to the database as NHibernate would have been issuing UPDATE statements when it should have been issuing INSERT.
It means that you have multiple transactions accessing the same data, thus producing concurrency issues. You should improve on your data access handling, you probably are updating data from multiple threads, syndicate the changed data into a queue first which handles all the access to the db.
An old post, but hopefully my info will help someone. I was getting a similar error but only when persisting associations, after I had added in a new object. The error was of the form:
NHibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect) [My.Entity#0]
Note the zero on the end, which is my identifier property. It should not be trying to save with key zero as I was using identity specification in SQL Server (generator class=native). I had not changed my unsaved-value in my xml so I had no idea what the problem was; for some reason NHibernate was trying to do an update using key value as 0 instead of a save (and getting the next key identity) for my new object.
In the end I found the cause was that I was initialising Version number to 1 for the new object in my constructor! Even though my identifier property was zero, for some reason NHibernate was also looking for a version property of zero as well, to identify it as an unsaved transient instance. The book "NHibernate in Action" does actually mention this on page 120, but for some reason my objects were fine when persisting with version number of 1 normally, and only failing if saving a new object through an association.
So make sure you do not set your Version value (leave as zero or null).
You say that your data is ok, but check if for example you are mapping the ID as self generate. I had the exact same problem, but I was sending an object with an ID different from 0.
Hope it helps!
My problem was this:
[Bind(Include="Name")] EventType eventType
Should have been:
[Bind(Include="EventTypeId,Name")] EventType eventType
Just as other answers suggest nhibernate was using zero as the id for my entity.
If you have a trigger on the table, it can be the reason. In this case, add inside it
SET ROWCOUNT 0;
SET NOCOUNT ON;
This error happened to me in the following way:
List < Device > allDevices = new List < Device > ();
//Add Devices to the list
allDevices.Add(aDevice);
//Add allDevices to database //Will work fine
// allDevices.Clear(); //Should be used here
//Later we add more devices
allDevices.Add(anotherDevice);
//Add allDevices to Database -> We get the error
//Solution to this
allDevices.Clear(); //Before adding new transaction with the oldData,
My java/groovy program receives table names and table fields from the user input, it queries the tables in SAP and returns its contents.
The user input may concern the tables CDPOS and CDHDR. After reading the SAP documentations and googling, I found these are tables storing change document logs. But I did not find any remote call functions that can be used in java to perform this kind of queries.
Then I used the deprecated RFC Function Module RFC_READ_TABLE and tried to build up customized queries only depending on this RFC. However, I found if the number of desired fields I passed to this RFC are more than 2, I always got the DATA_BUFFER_EXCEEDED error even if I limit the max rows.
I am not authorized to be an ABAP developer in the SAP system and can not add any FM to existing systems, so I can only write code to accomplish this requirement in JAVA.
Am I doing something wrong? Could you give me some hints on that issue?
DATA_BUFFER_EXCEEDED only happens if the total width of the fields you want to read exceeds the width of the DATA parameter, which may vary depending on the SAP release - 512 characters for current systems. It has nothing to do with the number of rows, but the size of a single dataset.
So the question is: What are the contents of the FIELDS parameter? If it's empty, this means "read all fields." CDHDR is 192 characters in width, so I'd assume that the problem is CDPOS which is 774 characters wide. The main issue would be the fields VALUE_OLD and VALUE_NEW, both 245 Characters.
Even if you don't get developer access, you should prod someone to get read-only dictionary access to be able to examine the structures in detail.
Shameless plug: RCER contains a wrapper class for RFC_READ_TABLE that takes care of field handling and ensures that the total width of the selected fields is below the limit imposed by the function module.
Also be aware that these tables can be HUGE in production environments - think billions of entries. You can easily bring your database to a grinding halt by performing excessive read operations on these tables.
PS: RFC_READ_TABLE is not released for customer use as per SAP note 382318, and the note 758278 recommends to create your own function module and provides a template with an improved logic.
Use BBP_RFC_READ_TABLE instead
There is a way around the DATA_BUFFER_EXCEED error. Although this function is not released for customer use as per SAP OSS note 382318, you can get around this issue with changes to the way you pass parameters to this function. Its not a single field that is causing your error, but if the row of data exceeds 512 bytes this error will be raised. CDPOS will have this issue for sure!
The work around if you know how to call the function using Jco and pass table parameters is to specify the exact fields you want returned. You then can keep your returned results under the 512 byte limit.
Using your example of table CDPOS, specify something like this and you should be good to go...(be careful, CDPOS can get massive! You should specify and pass a where clause!)
FIELDS = 'OBJECTCLAS'....
FIELDS = 'OBJECTID'
In Java it can be expressed as..
listParams.setValue(this.getpObjectclas(), "OBJECTCLAS");
By limiting the fields you are returning you can avoid this error.