Getting the length of a field in a database.

I have a field in a database that has a char length of 20, is there anyway to get that length from the database.

I probally didn't explain myself properley. The field might not have anything in it. The field would only except a length of 20, some have 10 others 5.
I have a GUI repersenting a table in the database. When the user is inputting into this field I want to stop them from entering more than 20 Characters. I need to know how many characters the field will accept.
I'm trying to stop my client from calling me up and saying that there something rong with the program because when he enters data, it only saves half of it.

Similar Messages

How to get the length of a field.

Hi all,
I m working on dynamic internal table.There is a need to get the length of a field, filled dynamically.How can we get it.
Thanks in advance.
Regards,
Swati garg

Swati,
DATA: text(8) TYPE c,
      len TYPE i.
DESCRIBE FIELD text LENGTH len IN CHARACTER MODE.
Field LEN contains the value 8.
================================
For ouput length :
DATA: float TYPE f,
      out TYPE i,
      len TYPE i.
DESCRIBE FIELD float LENGTH len OUTPUT-LENGTH out.
This example results in the field LEN containing the value 8, while the field OUT contains the value 22.
Don't forget to reward if useful.....

Get the length of a field in smartform

How can i get the length of a field (text) in smartform

Hi,
use strlen to calculate the length.
for ex:
you need to declare a variable of type string:
data g_conv type string.
and convert the variable holding the text in ur code
g_conv = <var holding the txt>.
then perform STRLEN ( g_conv)
This will give the correct result.
hope this will help you

How to get the length of a field value, not the length of DB's CHAR(20)

Hello.
I'm trying to handle a String from my DataBase and get its length:
String myName;
int i;
PreparedStatement sql = Conn.prepareStatement("SELECT NAME FROM MY_TABLE");
ResultSet results = sql.executeQuery();
results.next();
myName = results.getString("NAME");
i = myName.length();
out.println("The value is " + myName + " and the length is " + String.valueOf(i) );
I get:
" The value is Tom and the lengh is 20 "
20 is the length of the field (it's a CHAR (20) ), but I would like to get the length
of 'Tom'.
On other hand, I would like to detect if this value is 'Tom' or not, but trying with:
if (myName.equals("Tom")) {...}
or
if (myName == "Tom") {...}
There is no response.
Any experience?

myName = results.getString("NAME");
if(myName!=null) myName = myName.trim(); //Take out trailing spaces
i = myName.length();Sudha

How to check the length of a field symbol value

hi all,
i have a problem with string function, i have assined table fields to a field symbol in a loop i want check the length of the assigned fields symbol value in every loop . i have written like ,,,,,len = strlen( <fs>). then i am getting the length of the field label what i ahve assigned to fiels symbol not the field value lenght ,
please advise me on this,
thanks,
sre

I think you're on the right track. This should work:
data: len type i.
data: begin of itab OCCURS 1,
 a type string value '1',
 b type string value '12',
 c type string value '123',
 end of itab.
FIELD-SYMBOLS: <fs> type ANY.
do 3 times.
assign component sy-index of STRUCTURE itab to <fs>.
len = strlen( <fs> ).
enddo.

Need to get the values from "Signed" field from PDF form.

Hi,
This is Dinesh. I am PHP Developer. My issue is "I am not able to get the value of "signed" field from the PDF form when the form has been submitted.". I want to get the Digital Signature value of that field and i need to store it in the DB.
Please help me here Or Please forward this issue to any of the PHP developer who solved this issue and let me know.
Thanks & Regards
Dinesh

Hi Vikas,
you can use this badi MRM_WT_SPLIT_UPDATE, the method will be WHTAX_SPLIT_UPDATE
in this badi please see the importing and exporting parameters, you will get the values of withholding tax code as TE_RBWS in export parameters.
Please search in google or SCN you will get how to use it.

How to get the name of a field without specifying it as a string (somehow v

Is it possible to get the name of a field (or method) somehow via the class in which it is declared?
The reason why I ask is, that quite often the name of a field is important, because the name is the anchor for further processing, like for example when using reflection (e.g. Class.getfield(NameOfTheField)).
Assume you have class FooSimple with the field String firstName.
Now you would do something like this:
Class<FooSimple> cls = FooSimple.class;
Field f = cls.getField("firstName");
The problem is, that the string firstName is kind of hard coded. When the name of the field in class FooSimple changes (e.g. to theFirstName), the invocation will not work anymore when you forget to change the string too.
I think it would be very helpful to have access to the name of the field directly via the class by doing something like this.
Class<FooSimple> cls = FooSimple.class;
Field f = cls.getField(FooSimple.firstName.fieldName);
The Java Compiler would then resolve FooSimple.firstName.fieldName to the string firstName. When later the name of the field is changed, the IDE would change the name everywhere where it is used. So if the name of the field would be changed to theFirstName the IDE would also change the statement to
Class<FooSimple> cls = FooSimple.class;
Field f = cls.getField(FooSimple.theFirstName.fieldName);
A technique like this would be in my opinion much more safety and more generic.
Any ideas?
Best Regards.

Well, I think the discussion is going in a wrong direction because the original issue was not to discuss if it is worth coding some helper classes or a framework or that like. Let me bring it back to my original point.
Basically you can reduce my original question to this:
Currently it is possible to use the reflection API on a class level without specifying the name of the class with a string constant.
My issue is, that I think it would be a nice extension for Java, if the same would be possible for field variables of a Java class. Currently the only way you can do this is by specifying the field variable with a string constant.
Let me bring some motivations which brought me to this issue.
Assume you have an entity bean which represents a DB table and you use Java Persistence (either JPA or something like Hibernate). Then you would have a class looking like this (very simple sample to make this reply shorter).
@Entity
@Table(name = "PERSON")
public class Person implements Serializable {
@Column(name = "NAME")
private String name;
// constructor, getter, setter, etc. not listed here
}The whole issue of the design of JPA is, that such entity beans represent the mapping between the object model and the DB model, the mapping is expressed with annotations.
Okay, now lets assume you write a query in Query Language, e.g.
String sql = select p from Person p where name = :name;name is the name of the field variable, :name is the parameter you later set with Query.setParameter method.
What is not so nice is the fact, that you use the name of the class and the name of the field variables hardcoded to construct the query. Now you could think that basically this information is part of your entity class. First you start with the name of the class (i.e. the table name) to decouple this hardcoding.
You could write instead:
String sql = select p from + Person.class.getSimpleName() + p where name = :name;This is really nice, because whenever you change the name of your Person class, this change happens automatically for the sql statement as well.
I think the next thoughts are obvious, now, since you have decoupled the hardcoded part of the name of the class, you would like to do the same for the names of the field variables. But now you are stuck, there is no way to do this using a similar technique like for the name of the class. Either you stay with the query as it is now, or, to make it a little bit better, you code string constants for the field variables and use them. This issue brought me to the point that I think it would be nice to have the possibility to get the name of a field variable in a similar way as you can get it for the name of the class.
Conceptually it is just to go one level deeper, i.e.
first level is to get the name of a class
second level is to get the name of the field variable of a class.
Another sample would be, if you want to code something by using reflection. You have perfectly access to the reflection API starting at the class level like Person.class.allTheNiceReflectionMethods. There is no need to specify the class first with a string constant first, you directly start with the class, you can even be generic and just work on the Class.class level and still have access to all these nice methods to get out the information you need.
But if you need to start with a very specific field variable (like in the sample above), you must go by using a string constant like Person.class.getDeclaredField(name).
So basically I think that there exist already millions of lines of Java code where a field variable is specified for further processing, especially in combination with the reflection functionality and everywhere the field variables are specified by these string constants in double quotes. I would assume, that everyone has the same problem, once changing the name of the field variable means to take care that also the content of the string which specifies the name of the field variable is changed.
I am wondering why one of the replies commented, why the name of a field variable is changed, it sounds to me that this is something which basically never happens. I dont know, I think that this happens actually quite often and thanks to all these nice IDEs and their rename feature this is usually no problem. From time to time names of classes change, name of field change, yes, they are often even completely rewritten, new field variables come in some are deleted, whatever it is. The way I currently can access the name of a class makes the code safer, because when I consequently go with Class.class.getSimpleName I always know, that when I rename the class all these statements are changed too If I delete such a class, I at least get a compile error.
My very simple issues is, that I think it would be nice to have the same comfort not only on a class level but also on the level of field variables, nothing more, nothing less.
To be honest, I have not browsed the forum yet if such an issue was already raised by other people (I will do this now), but somehow it is hard to imagine, that I am the first one.
Best regards.

How to get the length of apex_item in javascript?

Hello all
I am having a tabular report using apex_item, I want to know how can i get the length of the item in javascript? like we do in pl/sql using apex_application.g_f01.count().
and one more thing, when I go to certain page, tab of that page is getting disabled, what should I do to make tab available always whether I am on that page or on any other page.
Thanks
Tauceef

Hi Oli
Thanks for replying, In my first question actually I am validating the report values in javascript for that I need the length of the apex_item to run the loop that many times.
Like we can get the length using apex_application.g_f011.count in pl/sql process how to get the length in the javascript, is there a way for that?
I got the answer for the second question, this is the one.
Thanks
Tauceef

How to get the length of a audio file without play it ?

Now I know a method to get the length of a audio file by play it:
1 Create a Player, and add a ControllerListener
2.Start the Player
3.In the ControllerListener's controllerUpdate method, use getMediaTime() by receiving a EndOfMediaEvent
However I think this method is not convenience, if I don't want to play it how I can get the length of the audio file?
Is anyone can help me?Really thanks a lot !

I got the answer here:
http://forum.java.sun.com/thread.jspa?threadID=5149132&tstart=15
I tried getDuration() before, but it always return a same time, I think maybe I didn't realize the player.

How can I get the length of a sequence using script

I am trying to get the length of an image sequence that was imported using importOptions.sequence. I need to check that the length is a correct number, and if it is too short/long it gives an error message.
Is there a way to do this?
Thanks

//Assumes that your clip is the first item in your project
var a = app.project.item(1).duration;     //Returns clip length in seconds
var b = app.project.item(1).frameDuration     //Returns a single frame length in seconds
var c = a/b;     //If you divide the clip duration by the frameDuration, you should get clip length in frames

How can I get the previous record's field value in a VO

Hi I would like to know how can I get the previous record's field value in a VO
For example : I have a VO porequisitionlinesvoimpl, and it contains 5 records (porequisitionlinesvoimpl.getRowCount() = 5). How can I search all records in the VO and get the field (attribute3) for all records?
Many thanks anyone can help
Lawrence

Hi ,
U can loop through the VO to get the value of attribute3,
need to extend the controller ,use below code
OAViewObject vo = (OAViewObject)oawebbean.getApplicationModule (VO1);
OARow row = null;
int fetchedRowCount = vo.getFetchedRowCount();
RowSetIterator Iter = vo.createRowSetIterator("Iter");
if (fetchedRowCount > 0)
Iter .setRangeStart(0);
Iter .setRangeSize(fetchedRowCount);
for (int i = 0; i < fetchedRowCount; i++)
row = (OARow)Iter .getRowAtRangeIndex(i);
String value = (String)row.getAttribute("Atrribute3");
Thanks
Pratap

How can u get the Length of a file u are going to download?

HI, 
I have another question, is it possible that u can get the length of a file which u are just going to download? 
 
I have the following code example: 
 url = new URL(dlfrom); 
f=new File(url.toURI()); 
System.out.println(f.length)(); 
unfortunatly it keeps throwing an exception, please help.

RTFM
http://java.sun.com/j2se/1.5.0/docs/api/java/net/URLCo
nnection.html#getContentLength() 
I tried to apply your sollution, but it is allways returning -1, so what should I do now, is there any possebility still to get the length of the object, because i thought of doing something similar as a tool to download stuff

How can i get the length of a DefaultTreeModel

i got a tree structure (DefaultTreeModel), now i want to know how many level of this tree, what method can i call to get the length of the tree???

What sort of TreeNodes do you have in your Tree? If you have DefaultMutableTreeNodes in there then you could call the getDepth method on the root node. That operation is expensive though.
Good Luck
Lee

How to get the class name and field name dynamically

Hi
I have a class (ex: Contract) the fields (ex : a,b,c) .i need to get the class name and field name dynamically
ex
if( validation file for the field Contract.a){
return contract.a;
}else if(validation file for the field Contract.b){
return contract.b;
how to pass the field name and object dynamically
Please help me .............
Thanks in Advance..
Edited by: 849614 on Aug 11, 2011 6:49 AM

YoungWinston wrote:
maheshguruswamy wrote:
Agreed, but IMO, i still feel its best if there is no tie in between consumer class level details and the database it talks to. A service layer is needed in between them.Sounds like you've done a bit of this before. Me, I've either been a modeller/DBA, doling out data, or a nuts and bolts programmer (and actually more toolmaker than apps, but did a bit of that too).
Do you know of a good book about the "middle ground" (ie, these service layers)? I understand it empirically, but haven't had a lot of exposure to it.
Winston
Edited by: YoungWinston on Aug 11, 2011 10:34 PM
PS: Apologies. Edited my previous post, presumably while you were composing your reply, when I finally realized what '.filed' meant.Most of my work is in web development, never been a DBA :) . The biggest 'concern' in my shop is 'separation of concerns'. The UI group reports up to a different IT head, the DB group reports up to a different IT head and so on. The looser the coupling between these systems, the lesser the project costs (Integration, QA etc) are. Martin Fowler's books contain good information about separation of concerns in an enterprise environment. The two books which i recommend are
[url http://www.amazon.com/Patterns-Enterprise-Application-Architecture-Martin/dp/0321127420]Enterprise Application Architecture and
[url http://www.amazon.com/Enterprise-Integration-Patterns-Designing-Deploying/dp/0321200683/ref=pd_sim_b_1]Enterprise Integration Patterns

Character semantics when setting the length of NVARCHAR2 field (Oracle 10g)

SQL> CREATE TABLE viv_naseleni_mesta (
2 naseleno_mjasto_id INTEGER NOT NULL PRIMARY KEY,
3 ime NVARCHAR2(15 CHAR) NOT NULL,
4 oblast_id INTEGER NOT NULL REFERENCES viv_oblasti(oblast_id),
5 grad CHAR NOT NULL CHECK (grad IN (0,1)),
6 de_timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
7 de_update_time TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
8 de_operator INTEGER DEFAULT NULL,
9 de_versija NUMBER(5,2) DEFAULT NULL
10 );
ime NVARCHAR2(15 CHAR) NOT NULL,
ERROR at line 3:
ORA-00907: missing right parenthesis
It seems that the DB does not accept the length of a field to be given in character
semantics. I have several sources that say it is possible, but is that
only possible in 11g?

According to the docs, NCHAR and NVARCHAR2 types are always character-based. So specifying in CHAR doesn't make sense explicitly.
http://download.oracle.com/docs/cd/B19306_01/server.102/b14225/ch3globenv.htm#sthref385
Cheers
Sarma.

Getting the length of a field in a database.

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