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• ArchBeat Facebook Friday: Top 10 Posts - August 8-14, 2014

  - by Bob Rhubart-Oracle

  5,307 people pay attention to the OTN ArchBeat Facebook Page. Here are the Top 10 posts from that page for the last seven days, August 8-14, 2014. Podcast: ODTUG Kscope 2014: Anatomy of a User Conference - Part 3 There is more to a great user conference than a shared interest in Oracle products. In the final segment of this 3-part OTN ArchBeat Podcast panelists Danny Bryant , Chet "ORACLENERD" Justice, Cameron Lackpour, Debra Lilley, and Mike Riley discuss the nature and importance of community Oracle SOA Suite 12c: The LDAP Adapter quick and easy | Maarten Smeets Maarten Smeets' how-to post describes the installation and configuration of an LDAP server and browser (ApacheDS and Apache Directory Studio). Process level Exception Handling in BPM12c | Abhishek Mittal When an exception occurs while running a process flow you have two choices: 1) retry running the flow object that caused that process flow or 2) move the process instance to the next flow object in the main process flow. Abhishek Mittal shows you how to do both. Building a Responsive WebCenter Portal Application | JayJay Zheng Oracle ACE JayJay Zheng's article addresses the essentials of responsive web design, shows you how to design and develop a responsive WebCenter Portal application, and reviews key development considerations. Cloud Control authorization with Active Directory | Jeroen Gouma Jeroen Gouma takes you step-by-step through the user authortization process in Oracle Enterprise Manager Cloud Control 12c. Video: CIOs Guide to Oracle Products and Solutions | Jessica Keyes The CIO's Guide to Oracle Products and Solutions author Jessica Keyes talks about why input from users and developers is essential to CIOs who want to avoid being escorted out of the building by security guards. Read A CIO's Guide to Oracle Cloud Computing, a sample chapter from the book. Twitter Tuesday - Top 10 @ArchBeat Tweets - August 5-11, 2014 @OTNArchBeat followers from across the galaxy have spoken! Here are the Top 10 tweets for the past seven days. Topics include: Hyperion, OBIEE, ODI, Oracle MAF, and SOA Suite. Recap: Fusion Middleware Summer Camps - Lisbon 2014 | Simon Haslam Oracle ACE Director Simon Haslam's recap of his experience at the Oracle Fusion Middleware Summer Camp in Lisbon, Portugal will make you wish you had been there. WebLogic Data Source Connection Labeling | Steve Felts The connection labeling feature was added in WLS release 10.3.6, and enhanced in release WLS 12.1.3. This post by Steve Felts describes two new connection properties that can be configured on the data source descriptor. Why Mobile Apps <3 REST/JSON | Martin Jarvis Martin Jarvis explores the preference for REST and JSON over SOAP and XML for mobile web services.

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• Is there a Standard or Best Practice for Perl Programs, as opposed to Perl Modules?

  - by swestrup

  I've written any number of perl modules in the past, and more than a few stand-alone perl programs, but I've never released a multi-file perl program into the wild before. I have a perl program that is almost at the beta stage and is going to be released open source. It requires a number of data files, as well as some external perl modules -- some I've written myself, and some from CPAN -- that I'll have to bundle with it so as to ensure that someone can just download my program and install it without worrying about hunting for obscure modules. So, it sounds to me like I need to write an installer to copy all the files to standard locations so that a user can easily install everything. The trouble is, I have no idea what the standard practice would be for this. I have found lots of tutorials on perl module standards, but none on perl program standards. Does anyone have any pointers to standard paths, installation proceedures, etc, for perl programs? This is going to be complicated by the fact that the program is multi-platform. I've been testing it in Linux, but its designed to work equally well in Windows.

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• joining null in MS SQL server, Oracle and informatica

  - by jest

  hi! I've two tables to join with a column(say emp_id)..if emp_id in both the tables have null values, how'll MS SQL server and Oracle treat??? Coz, i read that informatica will neglect the NULL rows when joining..if i handle the null, by substituting -1, a cross-join will happen which i don't want.. what can i do here? I cannot completely neglect the rows which has NULL. Thanks

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• Python web frameworks comparisons

  - by stupidLearner

  I recently asked a question on SO about Python web frameworks: http://stackoverflow.com/questions/4909306/python-web-frameworks-vs-java-web-frameworks-how-is-web-development-in-python-do I want to learn one just for fun but it also has to be able to help me deliver a proper working application. I am looking for a framework with lots of features, powerful, mature, with large community, good documentation, books etc. I need something that will help me be more productive in developing my app and not waste time figuring out how to do a certain thing in the framework or how to write workaround around the limitations of the framework. I was thinking one of the following: django, zope, turbogears, pylons. Off course the war is raging out there and there are other alternatives but seems Django is at the top... or is it just hype? I am interested in pros and cons of each. What was the best feature you think the framework has? What is the thing it lacks? What could have been done differently. Help me chose one to learn for starters.

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• ORACLE XML publishing

  - by Seedorf

  Hey guys, I was wondering which tool in ORACLE 11g (their latest DBMS) can be used for publishing XML. I am about to download it but would first like to know the name of the XML publisher and where I could get more information about it from. Thanks in advance. S

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• Konszolidációs stratégiák az Oracle Database Machine-hez webcast, 2010. június 16.

  - by Fekete Zoltán

  Az utóbbi hetekben két tanfolyamon vettem részt, így a blogbejegyzések nem szaporodtak. Na most újult erovel. :) Regisztráció a webcast-ra. Holnap, azaz 2010. június 16-án 18h-kor (közép-európai ido) csatlakozhatunk a Consolidation Strategies for Oracle Database Machine, azaz a Konszolidációs stratégiák az Oracle Database Machine-hez címu webcasthoz, amit az Oracle BIWA és az Exadata SIG (Special Interest Group) rendez meg. Az eloadó: Dave Norris, aki az Oracle X Team tagja. Exadata SIG: http://OracleExadata.org BIWA SIG http://OracleBIWA.org The Oracle Database Machine V2 (the Exadata system) offers customers the opportunity to run combinations of consolidated workloads for both data warehousing (DW) and online transaction processing (OLTP) while maintaining superior performance. Regisztráció a webcast-ra.

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• How to compare Oracle XML Gateway Message Designer maps? (.xgm)

  - by Kamil Zadora

  They are XML, but it seems that they seem to be recreated each time the map is being saved and the ids of the elements inside are changing each time. The tool (Message Designer) is quite old and not very convinient to use. Have you any hints how to version, track changes in such map? Or is there an alternative for Message Designer?

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• Including libraries in project. Best practise.

  - by mridang

  Hi guys, I'm writing a Python open-source app. My app uses some open source Python libraries. These libraries in turn use other open-source libraries. I intend to release my code at Sourceforge or Google Code but do I need to include the sources of the other libraries? Is this a good practice? ...or should I simply write this information into a README file informing the use about the other required libraries. I've placed all these libraries into a libs sub folder in my source directory. When checking my code into SVN, should I use something called svn:externals to link to other sources? Is there a way to dynamically update my libraries to the latest version or is this something I have to do manually when I release a new version. My sincerest apologies if my question sounds vague but I'm pretty lost in this matter and I don't know what to Google for. Thanks all.

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• Oracle Coding Standards Feature Implementation

  - by Mike Hofer

  Okay, I have reached a sort of an impasse. In my open source project, a .NET-based Oracle database browser, I've implemented a bunch of refactoring tools. So far, so good. The one feature I was really hoping to implement was a big "Global Reformat" that would make the code (scripts, functions, procedures, packages, views, etc.) standards compliant. (I've always been saddened by the lack of decent SQL refactoring tools, and wanted to do something about it.) Unfortunatey, I am discovering, much to my chagrin, that there doesn't seem to be any one widely-used or even "generally accepted" standard for PL-SQL. That kind of puts a crimp on my implementation plans. My search has been fairly exhaustive. I've found lots of conflicting documents, threads and articles and the opinions are fairly diverse. (Comma placement, of all things, seems to generate quite a bit of debate.) So I'm faced with a couple of options: Add a feature that lets the user customize the standard and then reformat the code according to that standard. —OR— Add a feature that lets the user customize the standard and simply generate a violations list like StyleCop does, leaving the SQL untouched. In my mind, the first option saves the end-users a lot of work, but runs the risk of modifying SQL in potentially unwanted ways. The second option runs the risk of generating lots of warnings and doing no work whatsoever. (It'd just be generally annoying.) In either scenario, I still have no standard to go by. What I'd need to know from you guys is kind of poll-ish, but kind of not. If you were going to use a tool of this nature, what parts of your SQL code would you want it to warn you about or fix? Again, I'm just at a loss due to a lack of a cohesive standard. And given that there isn't anything out there that's officially published by Oracle, I think this is something the community could weigh in on. Also, given the way that voting works on SO, the votes would help to establish the popularity of a given "refactoring." P.S. The engine parses SQL into an expression tree so it can robustly analyze the SQL and reformat it. There should be quite a bit that we can do to correct the format of the SQL. But I am thinking that for the first release of the thing, layout is the primary concern. Though it is worth noting that the thing already has refactorings for converting keywords to upper case, and identifiers to lower case.

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• Start oracle dequeue on startup

  - by Geln

  Hi, I got the following error of Oracle, ORA-25226: dequeue failed, queue string.string is not enabled for dequeue And the following is the Cause and Action for it from the official document: Cause: The queue has not been enabled for dequeue. Action: Enable the queue using START_QUEUE. But this error occurs every time when restart the database, is there any configuration to set to start the dequeue on database startup? thanks!

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• Free desktop client for Oracle?

  - by pugmarx

  Which is the best Open Source free client for querying an Oracle database? It may additionally support other databases (MySQL, Postgres etc), since our development environment often requires switching between different databases.

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• Oracle Sql Developer vendor code 1317

  - by Zemian

  Hi, I am using Oracle Sql Developer to browse a MySQL database. When I browse table with Columns tab(shows table definitions), some of tables will display an Error Encountered dialog that says: Vendor code 1317. Does anyone know how I can resolve this? Thanks, /Z

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• Is there a Standard or Best Practice for Perl Progams, as opposed to Perl Modules?

  - by swestrup

  I've written any number of perl modules in the past, and more than a few stand-alone perl programs, but I've never released a multi-file perl program into the wild before. I have a perl program that is almost at the beta stage and is going to be released open source. It requires a number of data files, as well as some external perl modules -- some I've written myself, and some from CPAN -- that I'll have to bundle with it so as to ensure that someone can just download my program and install it without worrying about hunting for obscure modules. So, it sounds to me like I need to write an installer to copy all the files to standard locations so that a user can easily install everything. The trouble is, I have no idea what the standard practice would be for this. I have found lots of tutorials on perl module standards, but none on perl program standards. Does anyone have any pointers to standard paths, installation proceedures, etc, for perl programs? This is going to be complicated by the fact that the program is multi-platform. I've been testing it in Linux, but its designed to work equally well in Windows.

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• Populate an SQL Server 2k8 with Oracle Loader files

  - by Techpriester

  Hi folks. Here's the problem: I have a project that needs to be migrated to Microsoft SQL Server 2008. We have data in text files for the Oracle SQL Loader and now we need to get that data into the SQL Server DB. I could write a program that converts everything into INSERT statements but there has to be a more comfortable way to so this. Any suggestions? PS: I don't think my company wants to buy additional Software to do this job so that's out.

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• XML Return from an Oracle Stored Procedure

  - by Tequila Jinx

  Unfortunately most of my DB experience has been with MSSQL which tends to hold your hand a lot more than Oracle. What I'm trying to do is fairly trivial in tSQL, however, pl/sql is giving me a headache. I have the following procedure: CREATE OR REPLACE PROCEDURE USPX_GetUserbyID (USERID USERS.USERID%TYPE, USERRECORD OUT XMLTYPE) AS BEGIN SELECT XMLELEMENT("user" , XMLATTRIBUTES(u.USERID AS "userid", u.companyid as "companyid", u.usertype as "usertype", u.status as "status", u.personid as "personid") , XMLFOREST( p.FIRSTNAME AS "firstname" , p.LASTNAME AS "lastname" , p.EMAIL AS "email" , p.PHONE AS "phone" , p.PHONEEXTENSION AS "extension") , XMLELEMENT("roles", (SELECT XMLAGG(XMLELEMENT("role", r.ROLETYPE)) FROM USER_ROLES r WHERE r.USERID = USERID AND r.ISACTIVE = 1 ) ) , XMLELEMENT("watches", (SELECT XMLAGG( XMLELEMENT("watch", XMLATTRIBUTES(w.WATCHID AS "id", w.TICKETID AS "ticket") ) ) FROM USER_WATCHES w WHERE w.USERID = USERID AND w.ISACTIVE = 1 ) ) ) AS "RESULT" INTO USERRECORD FROM USERS u LEFT JOIN PEOPLE p ON p.PERSONID = u.PERSONID WHERE u.USERID = USERID; END USPX_GetUserbyID; When executed, it should return an XML document with the following structure: <user userid="" companyid="" usertype="" status="" personid=""> <firstname /> <lastname /> <email /> <phone /> <extension /> <roles> <role /> </roles> <watches> <watch id="" ticket="" /> </watches> </user> When I execute the query itself, replacing the USERID parameter with a string and removing the "into" clause, the query runs fine and returns the expected structure. However, when the procedure attempts to execute the query, passing the results of the XMLELEMENT function into the USERRECORD output parameter, I get the following exception: Error report: ORA-01422: exact fetch returns more than requested number of rows ORA-06512: at "USPX_GETUSERBYID", line 4 ORA-06512: at line 3 01422. 00000 - "exact fetch returns more than requested number of rows" *Cause: The number specified in exact fetch is less than the rows returned. *Action: Rewrite the query or change number of rows requested I'm baffled trying to nail this down, and unfortunately my google-fu hasn't helped. I've found plenty of Oracle SQL|XML examples, but none that deal with XML returns from a procedure. Note: I know that an alternate method of retrieving XML using DBMS methods exists, however, it's my understanding that that functionality is deprecated in favor of SQL|XML.

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• Is using the Class instance as a Map key a best practice?

  - by Pangea

  I have read somewhere that using the class instances as below is not a good idea as they might cause memory leaks. Can someone tell me if if that is a valid statement? Or are they any problems using it this way? Map<Class<?>,String> classToInstance=new HashMap(); classToInstanceMap.put(String.class,"Test obj");

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• Best S.E.O. practice for backlinking etc

  - by Aaron Lee

  I'm currently working on a website that I am really looking to optimise in terms of search engines, i've been submitting between 5-20 directory submissions daily, i've validated and optimised my code and i've joined a lot of forums etc to speak of the website in question, however, I don't seem to be making much of an impact in terms of Google. I know that S.E.O. takes a while to start making an impact, and that Google prefers sites that a regularly updated and aged, but are there any more practices that can really help with organic results in Search engines. I have looked on Google itself, and a few other SE's but nobody is willing to talk about extensive S.E.O. practices as they normally don't want people knowing their formula's for S.E.O., also does anyone know of a decent piece of software that really looks into the in's and out's of your page and provides feedback, I usually use http://www.woorank.com, but only using one program doesn't show if it's exactly correct in what it's saying. If anyone could help it would be much appreciated, thank you very much.

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• Best style for Python programs: what do you suggest?

  - by Noctis Skytower

  A friend of mine wanted help learning to program, so he gave me all the programs that he wrote for his previous classes. The last program that he wrote was an encryption program, and after rewriting all his programs in Python, this is how his encryption program turned out (after adding my own requirements). #! /usr/bin/env python ################################################################################ """\ CLASS INFORMATION ----------------- Program Name: Program 11 Programmer: Stephen Chappell Instructor: Stephen Chappell for CS 999-0, Python Due Date: 17 May 2010 DOCUMENTATION ------------- This is a simple encryption program that can encode and decode messages.""" ################################################################################ import sys KEY_FILE = 'Key.txt' BACKUP = '''\ !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNO\ PQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~ _@/6-UC'GzaV0%5Mo9g+yNh8b">Bi=<Lx [sQn#^R.D2Xc(\ Jm!4e${lAEWud&t7]H\`}pvPw)FY,Z~?qK|3SOfk*:1;jTrI''' ################################################################################ def main(): "Run the program: loads key, runs processing loop, and saves key." encode_map, decode_map = load_key(KEY_FILE) try: run_interface_loop(encode_map, decode_map) except SystemExit: pass save_key(KEY_FILE, encode_map) def run_interface_loop(encode_map, decode_map): "Shows the menu and runs the appropriate command." print('This program handles encryption via a customizable key.') while True: print('''\ MENU ==== (1) Encode (2) Decode (3) Custom (4) Finish''') switch = get_character('Select: ', tuple('1234')) FUNC[switch](encode_map, decode_map) def get_character(prompt, choices): "Gets a valid menu option and returns it." while True: sys.stdout.write(prompt) sys.stdout.flush() line = sys.stdin.readline()[:-1] if not line: sys.exit() if line in choices: return line print(repr(line), 'is not a valid choice.') ################################################################################ def load_key(filename): "Gets the key file data and returns encoding/decoding dictionaries." plain, cypher = open_file(filename) return dict(zip(plain, cypher)), dict(zip(cypher, plain)) def open_file(filename): "Load the keys and tries to create it when not available." while True: try: with open(filename) as file: plain, cypher = file.read().split('\n') return plain, cypher except: with open(filename, 'w') as file: file.write(BACKUP) def save_key(filename, encode_map): "Dumps the map into two buffers and saves them to the key file." plain = cypher = str() for p, c in encode_map.items(): plain += p cypher += c with open(filename, 'w') as file: file.write(plain + '\n' + cypher) ################################################################################ def encode(encode_map, decode_map): "Encodes message for the user." print('Enter your message to encode (EOF when finished).') message = get_message() for char in message: sys.stdout.write(encode_map[char] if char in encode_map else char) def decode(encode_map, decode_map): "Decodes message for the user." print('Enter your message to decode (EOF when finished).') message = get_message() for char in message: sys.stdout.write(decode_map[char] if char in decode_map else char) def custom(encode_map, decode_map): "Allows user to edit the encoding/decoding dictionaries." plain, cypher = get_new_mapping() for p, c in zip(plain, cypher): encode_map[p] = c decode_map[c] = p ################################################################################ def get_message(): "Gets and returns text entered by the user (until EOF)." buffer = [] while True: line = sys.stdin.readline() if line: buffer.append(line) else: return ''.join(buffer) def get_new_mapping(): "Prompts for strings to edit encoding/decoding maps." while True: plain = get_unique_chars('What do you want to encode from?') cypher = get_unique_chars('What do you want to encode to?') if len(plain) == len(cypher): return plain, cypher print('Both lines should have the same length.') def get_unique_chars(prompt): "Gets strings that only contain unique characters." print(prompt) while True: line = input() if len(line) == len(set(line)): return line print('There were duplicate characters: please try again.') ################################################################################ # This map is used for dispatching commands in the interface loop. FUNC = {'1': encode, '2': decode, '3': custom, '4': lambda a, b: sys.exit()} ################################################################################ if __name__ == '__main__': main() For all those Python programmers out there, your help is being requested. How should the formatting (not necessarily the coding by altered to fit Python's style guide? My friend does not need to be learning things that are not correct. If you have suggestions on the code, feel free to post them to this wiki as well.

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• Hidden features in Oracle

  - by Peter Gfader

  I enjoyed the answers and questions about hidden features in sql server What can you tell us about Oracle? Hidden tables, inner workings of ..., secret stored procs, package that has good utils...

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• What's the best practice way to convert enum to string?

  - by dario

  Hi. I have enum like this: public enum ObectTypes { TypeOne, TypeTwo, TypeThree, ... TypeTwenty } then I need to convert this enum to string. Now Im doing this that way: public string ConvertToCustomTypeName(ObjectTypes typeObj) { string result = string.Empty; switch (typeObj) { case ObjectTypes.TypeOne: result = "This is type T123"; break; case ObjectTypes.TypeTwo: result = "This is type T234"; break; ... case ObjectTypes.TypeTwenty: result = "This is type last"; break; } return result; } Im quite sure that there is better way do do this, Im looking for some good practice solution. Thanks in advance.

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• Oracle Coherence w/ ASP.NET application

  - by frankadelic

  Is it possible to use Oracle Coherence to provide distributed caching to an ASP.NET application? We would like to use Coherence to scale out an ASP.NET application which does not have distributed caching. Alternatives would be memcached, etc. However, we are considering Coherence since we already have licensing/expertise in that area.

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• Check how old an Oracle database is?

  - by Jamie

  Hi all, So, we have a mirror of a santized version of the production database. Is there anyway (that you know of) to find out how old the database is? i.e. when the database was put on the Oracle server. Thanks for any help!

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• MIgrating to Oracle

  - by Harish

  We are using a JEE application and we are right now using Informix DB.Our code hits the DB with queries like "select first 10 * from test" Now as far as I know Oracle does not support 'first 10 *' kind of statements.We have more than 1000 queries like this.Should we manually change this or can have some manual customization?

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• When can we expect Core JEE Patterns from SUN/Oracle like we already have for J2EE?

  - by Digambar Daund

  Just like we have www.corej2eepatterns.com for J2EE, when can we expect any resource(book) on patterns for JEE5/6?

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• What sort of Circular Dependencies does Oracle allow?

  - by Neil

  Hi all, I am creating test cases and I need to cover circular dependencies. So far I have been able to create two tables such that Table A has a FK to B and B has a FK to A. What other circular dependencies exist / are allowed between objects? I tried to create cycles between Views but Oracle successfully rejected that.

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