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  • Fixing Gatekeeper Row Cardinality Estimate Issues

    The Query Optimiser needs a good estimate of the number of rows likely to be returned by each physical operator in order to select the best query plan from the most likely alternatives. Sometimes these estimates can go so wildly wrong as to result in a very slow query. Joe Sack shows how it can happen with SQL Queries on a data warehouse with a star schema. Make working with SQL a breezeSQL Prompt 5.3 is the effortless way to write, edit, and explore SQL. It's packed with features such as code completion, script summaries, and SQL reformatting, that make working with SQL a breeze. Try it now.

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  • Google Analytics Request URI to Event advanced filter

    - by confidentjohn
    I have a query string attached to a Request URI. Whilst I can see this data within the pages report and it works, I was thinking about setting up an advanced filter to convert the request URI to an Event, with the hope this would clean up my pages report and sit this query with related events in my data. I can see in advanced filters that this is possible, but seems limited to specifying a single event area, so Cat, action or Label, not all 3. Does any one know how I could set up an advanced filter to find any URIs that contain a specific query string, say example below. www.example.com?querystring=123 and convert this into an event, where I can set the Cat, action and label.

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  • Consuming OData based Rest service in C# [en-US]

    - by ruimachado
    Nowadays comunication between applications is an active topic with daily usage and a large amount of pratical appliances. While developing an app in witch I had to consume an OData I found out that combining Linq with my code made this operation pretty easy.The algorithm to consume OData starts with adding a service reference to Visual Studio:After adding the service reference in wich you define the uri to the service, we start building our code.In your code the algorithm is the following:Define the Uri to your OData ServiceDefine the context of your odata, wich contains all entities exposed by the service.Query the context using LinqPrint the resultEasy and simple.Example code:01public static void Main(string[] args){02 03        Uri serviceUri= newUri("http://example.host.odataservice.net/service.svc", UriKind.Absolute);04        ODataService.ServiceEntities context = newODataService.ServiceEntities (serviceUri);05 06        context.Credentials = newSystem.Net.NetworkCredential(Username,Password);07 08         var query = from ServiceObject in context.YourEntity09                     select ServiceObject ;10 11        foreach (var myObject in query)12        {13            Console.WriteLine("\n Field1: {0} | Field2: {1}",14            myObject .Field1, myObject .Field2);15 16        }17}That’s it.Thank you,Rui Machadorpmachado.wordpress.com

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  • Where can I get the 10k common English dictionary words which Stack overflow uses in related question? [migrated]

    - by itpian.com
    Where can I get the 10k common English dictionary words which Stack overflow uses in related question? Here in SE podcast - http://blog.stackoverflow.com/2008/12/podcast-32/ One of our major performance optimizations for the “related questions” query is removing the top 10,000 most common English dictionary words (as determined by Google search) before submitting the query to the SQL Server 2008 full text engine. It’s shocking how little is left of most posts once you remove the top 10k English dictionary words. This helps limit and narrow the returned results, which makes the query dramatically faster.

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  • ??????????????????????????/????????????????????????·???????????|WebLogic Channel|??????

    - by ???02
    ??????????????????·???????Oracle Coherence??????Java???????????????????????????????????????????????????????????????????Java API??????Oracle Coherence???????????3????????????????????????Coherence???????????????????????????????3???????????(???)???????Coherence???????????????Java?????????? ???????????????????????·??????????/????·????Oracle Coherence???????????????????????Java API??????Oracle Coherence???????????????????????????????????????????????????????????????? ?????????????Coherence??????????????????????????????/???????????????????????????????????????????3???????(4)????????/???????????? ????????????????????????????????????·???/????????? Oracle Coherence????????????????1?????????????????????????????????????????????????????????????????????????????????????????????????????????????Oracle Coherence?????????????????????????·????????????????????????????????????????In-Place Processing????????Oracle Coherence???In-Place Processing????????????????????????????????????????? ????·???/???????????In-Place Processing??????????????????·?????????????????????????????????????????????????????????????????????????????????????????? ??????????????????????????????????????????????????? ???In-Place Processing????????·????????????Oracle Coherence 3.6????????????Coherence Query Language(CohQL)??????????????????????????????CohQL???????????????????SQL?????????????????SQL?WHERE?????????????????????????????(5)??????????????? ???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????(?????)????????????????????????????????????????????????????????????????????????????? Oracle Coherence?????????????????????????????????????Oracle Coherence???????????????????????????????????????????????????????????????????????????????????????????????/???????????????????????????????????????????? ??????·????????????????????????????????????????????????????Oracle Coherence?????????????????????????????????????????????(??????)????????????????????????????????????????????????????????? ???????·????????????Continuous Query Cache??????????????????????????????????????????????????????????????????????????????????????????????????????????????Continuous Query Cache????????????????????????(6)??????????????????? ????Oracle Coherence????????????Invocation Service??????????????????(4)?????In-Place Processing?????????????·?????????????????????????????????????????????????????Java??????????????????????????????·???????????????????????????????????????????????? ??????????????????????Oracle Coherence ??????????????????????????????????????????CPU???????????????????????Oracle Coherence???????????????????????????????????Web???????????????????????????Oracle Coherence?????????????????????????????????????????*   *   * ?????????Java????????????????????Oracle Coherence?6???????????????????????????Oracle Coherence????????????????????????????????????????????????????????Oracle Coherence?????:Aleksandar Seovic?Mark Falco?Patrick Peralta??:????·??????????????·????Oracle Coherence: Share and Manage Data In Clusters?···3????????????·??????????????????????????

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  • AIX Checklist for stable obiee deployment

    - by user554629
    Common AIX configuration issues     ( last updated 27 Aug 2012 ) OBIEE is a complicated system with many moving parts and connection points.The purpose of this article is to provide a checklist to discuss OBIEE deployment with your systems administrators. The information in this article is time sensitive, and updated as I discover new  issues or details. What makes OBIEE different? When Tech Support suggests AIX component upgrades to a stable, locked-down production AIX environment, it is common to get "push back".  "Why is this necessary?  We aren't we seeing issues with other software?"It's a fair question that I have often struggled to answer; here are the talking points: OBIEE is memory intensive.  It is the entire purpose of the software to trade memory for repetitive, more expensive database requests across a network. OBIEE is implemented in C++ and is very dependent on the C++ runtime to behave correctly. OBIEE is aggressively thread efficient;  if atomic operations on a particular architecture do not work correctly, the software crashes. OBIEE dynamically loads third-party database client libraries directly into the nqsserver process.  If the library is not thread-safe, or corrupts process memory the OBIEE crash happens in an unrelated part of the code.  These are extremely difficult bugs to find. OBIEE software uses 99% common source across multiple platforms:  Windows, Linux, AIX, Solaris and HPUX.  If a crash happens on only one platform, we begin to suspect other factors.  load intensity, system differences, configuration choices, hardware failures.  It is rare to have a single product require so many diverse technical skills.   My role in support is to understand system configurations, performance issues, and crashes.   An analyst trained in Business Analytics can't be expected to know AIX internals in the depth required to make configuration choices.  Here are some guidelines. AIX C++ Runtime must be at  version 11.1.0.4$ lslpp -L | grep xlC.aixobiee software will crash if xlC.aix.rte is downlevel;  this is not a "try it" suggestion.Nov 2011 11.1.0.4 version  is appropriate for all AIX versions ( 5, 6, 7 )Download from here:https://www-304.ibm.com/support/docview.wss?uid=swg24031426 No reboot is necessary to install, it can even be installed while applications are using the current version.Restart the apps, and they will pick up the latest version. AIX 5.3 Technology Level 12 is required when running on Power5,6,7 processorsAIX 6.1 was introduced with the newer Power chips, and we have seen no issues with 6.1 or 7.1 versions.Customers with an unstable deployment, dozens of unexplained crashes, became stable after the upgrade.If your AIX system is 5.3, the minimum TL level should be at or higher than this:$ oslevel -s  5300-12-03-1107IBM typically supports only the two latest versions of AIX ( 6.1 and 7.1, for example).  AIX 5.3 is still supported and popular running in an LPAR. obiee userid limits$ ulimit -Ha  ( hard limits )$ ulimit -a   ( default limits )core file size (blocks)     unlimiteddata seg size (kbytes)      unlimitedfile size (blocks)          unlimitedmax memory size (kbytes)    unlimitedopen files                  10240 cpu time (seconds)          unlimitedvirtual memory (kbytes)     unlimitedIt is best to establish the values in /etc/security/limitsroot user is needed to observe and modify this file.If you modify a limit, you will need to relog in to change it again.  For example,$ ulimit -c 0$ ulimit -c 2097151cannot modify limit: Operation not permitted$ ulimit -c unlimited$ ulimit -c0There are only two meaningful values for ulimit -c ; zero or unlimited.Anything else is likely to produce a truncated core file that cannot be analyzed. Deploy 32-bit or 64-bit ?Early versions of OBIEE offered 32-bit or 64-bit choice to AIX customers.The 32-bit choice was needed if a database vendor did not supply a 64-bit client library.That's no longer an issue and beginning with OBIEE 11, 32-bit code is no longer shipped.A common error that leads to "out of memory" conditions to to accept the 32-bit memory configuration choices on 64-bit deployments.  The significant configuration choices are: Maximum process data (heap) size is in an AIX environment variableLDR_CNTRL=IGNOREUNLOAD@LOADPUBLIC@PREREAD_SHLIB@MAXDATA=0x... Two thread stack sizes are made in obiee NQSConfig.INI[ SERVER ]SERVER_THREAD_STACK_SIZE = 0;DB_GATEWAY_THREAD_STACK_SIZE = 0; Sort memory in NQSConfig.INI[ GENERAL ]SORT_MEMORY_SIZE = 4 MB ;SORT_BUFFER_INCREMENT_SIZE = 256 KB ; Choosing a value for MAXDATA:0x080000000  2GB Default maximum 32-bit heap size ( 8 with 7 zeros )0x100000000  4GB 64-bit breaking even with 32-bit ( 1 with 8 zeros )0x200000000  8GB 64-bit double 32-bit max0x400000000 16GB 64-bit safetyUsing 2GB heap size for a 64-bit process will almost certainly lead to an out-of-memory situation.Registers are twice as big ... consume twice as much memory in the heap.Upgrading to a 4GB heap for a 64-bit process is just "breaking even" with 32-bit.A 32-bit process is constrained by the 32-bit virtual addressing limits.  Heap memory is used for dynamic requirements of obiee software, thread stacks for each of the configured threads, and sometimes for shared libraries. 64-bit processes are not constrained in this way;  extra heap space can be configured for safety against a query that might create a sudden requirement for excessive storage.  If the storage is not available, this query might crash the whole server and disrupt existing users.There is no performance penalty on AIX for configuring more memory than required;  extra memory can be configured for safety.  If there are no other considerations, start with 8GB.Choosing a value for Thread Stack size:zero is the value documented to select an appropriate default for thread stack size.  My preference is to change this to an absolute value, even if you intend to use the documented default;  it provides better documentation and removes the "surprise" factor.There are two thread types that can be configured. GATEWAY is used by a thread pool to call a database client library to establish a DB connection.The default size is 256KB;  many customers raise this to 512KB ( no performance penalty for over-configuring ). This value must be set to 1 MB if Teradata connections are used. SERVER threads are used to run queries.  OBIEE uses recursive algorithms during the analysis of query structures which can consume significant thread stack storage.  It's difficult to provide guidance on a value that depends on data and complexity.  The general notion is to provide more space than you think you need,  "double down" and increase the value if you run out, otherwise inspect the query to understand why it is too complex for the thread stack.  There are protections built into the software to abort a single user query that is too complex, but the algorithms don't cover all situations.256 KB  The default 32-bit stack size.  Many customers increased this to 512KB on 32-bit.  A 64-bit server is very likely to crash with this value;  the stack contains mostly register values, which are twice as big.512 KB  The documented 64-bit default.  Some early releases of obiee didn't set this correctly, resulting in 256KB stacks.1 MB  The recommended 64-bit setting.  If your system only ever uses 512KB of stack space, there is no performance penalty for using 1MB stack size.2 MB  Many large customers use this value for safety.  No performance penalty.nqscheduler does not use the NQSConfig.INI file to set thread stack size.If this process crashes because the thread stack is too small, use this to set 2MB:export OBI_BACKGROUND_STACK_SIZE=2048 Shared libraries are not (shared) When application libraries are loaded at run-time, AIX makes a decision on whether to load the libraries in a "public" memory segment.  If the filesystem library permissions do not have the "Read-Other" permission bit, AIX loads the library into private process memory with two significant side-effects:* The libraries reduce the heap storage available.      Might be significant in 32-bit processes;  irrelevant in 64-bit processes.* Library code is loaded into multiple real pages for execution;  one copy for each process.Multiple execution images is a significant issue for both 32- and 64-bit processes.The "real memory pages" saved by using public memory segments is a minor concern.  Today's machines typically have plenty of real memory.The real problem with private copies of libraries is that they consume processor cache blocks, which are limited.   The same library instructions executing in different real pages will cause memory delays as the i-cache ( instruction cache 128KB blocks) are refreshed from real memory.   Performance loss because instructions are delayed is something that is difficult to measure without access to low-level cache fault data.   The machine just appears to be running slowly for no observable reason.This is an easy problem to detect, and an easy problem to correct.Detection:  "genld -l" AIX command produces a list of the libraries used by each process and the AIX memory address where they are loaded.32-bit public segment is 13 ( "dxxxxxxx" ).   private segments are 2-a.64-bit public segment is 9 ( "9xxxxxxxxxxxxxxx") ; private segment is 8.genld -l | grep -v ' d| 9' | sort +2provides a list of privately loaded libraries. Repair: chmod o+r <libname>AIX shared libraries will have a suffix of ".so" or ".a".Another technique is to change all libraries in a selected directory to repair those that might not be currently loaded.   The usual directories that need repair are obiee code, httpd code and plugins, database client libraries and java.chmod o+r /shr/dir/*.a /shr/dir/*.so Configure your system for diagnosticsProduction systems shouldn't crash, and yet bad things happen to good software.If obiee software crashes and produces a core, you should configure your system for reliable transfer of the failing conditions to Oracle Tech Support.  Here's what we need to be able to diagnose a core file from your system.* fullcore enabled. chdev -lsys0 -a fullcore=true* core naming enabled. chcore -n on -d* ulimit must not truncate core. see item 3.* pstack.sh is used to capture core documentation.* obidoc is used to capture current AIX configuration.* snapcore  AIX utility captures core and libraries. Use the proper syntax. $ snapcore -r corename executable-fullpath   /tmp/snapcore will contain the .pax.Z output file.  It is compressed.* If cores are directed to a common directory, ensure obiee userid can write to the directory.  ( chcore -p /cores -d ; chmod 777 /cores )The filesystem must have sufficient space to hold a crashing obiee application.Use:  df -k  Check the "Free" column ( not "% Used" )  8388608 is 8GB. Disable Oracle Client Library signal handlingThe Oracle DB Client Library is frequently distributed with the sqlplus development kit.By default, the library enables a signal handler, which will document a call stack if the application crashes.   The signal handler is not needed, and definitely disruptive to obiee diagnostics.   It needs to be disabled.   sqlnet.ora is typically located at:   $ORACLE_HOME/network/admin/sqlnet.oraAdd this line at the top of the file:   DIAG_SIGHANDLER_ENABLED=FALSE Disable async query in the RPD connection pool.This might be an obiee 10.1.3.4 issue only ( still checking  )."async query" must be disabled in the connection pools.It was designed to enable query cancellation to a database, and turned out to have too many edge conditions in normal communication that produced random corruption of data and crashes.  Please ensure it is turned off in the RPD. Check AIX error report (errpt).Errors external to obiee applications can trigger crashes.  $ /bin/errpt -aHardware errors ( firmware, adapters, disks ) should be reported to IBM support.All application core files are recorded by AIX;  the most recent ones are listed first. Reserved for something important to say.

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  • Nashorn in the Twitterverse, Continued

    - by jlaskey
    After doing the Twitter example, it seemed reasonable to try graphing the result with JavaFX.  At this time the Nashorn project doesn't have an JavaFX shell, so we have to go through some hoops to create an JavaFX application.  I thought showing you some of those hoops might give you some idea about what you can do mixing Nashorn and Java (we'll add a JavaFX shell to the todo list.) First, let's look at the meat of the application.  Here is the repackaged version of the original twitter example. var twitter4j      = Packages.twitter4j; var TwitterFactory = twitter4j.TwitterFactory; var Query          = twitter4j.Query; function getTrendingData() {     var twitter = new TwitterFactory().instance;     var query   = new Query("nashorn OR nashornjs");     query.since("2012-11-21");     query.count = 100;     var data = {};     do {         var result = twitter.search(query);         var tweets = result.tweets;         for each (tweet in tweets) {             var date = tweet.createdAt;             var key = (1900 + date.year) + "/" +                       (1 + date.month) + "/" +                       date.date;             data[key] = (data[key] || 0) + 1;         }     } while (query = result.nextQuery());     return data; } Instead of just printing out tweets, getTrendingData tallies "tweets per date" during the sample period (since "2012-11-21", the date "New Project: Nashorn" was posted.)   getTrendingData then returns the resulting tally object. Next, use JavaFX BarChart to display that data. var javafx         = Packages.javafx; var Stage          = javafx.stage.Stage var Scene          = javafx.scene.Scene; var Group          = javafx.scene.Group; var Chart          = javafx.scene.chart.Chart; var FXCollections  = javafx.collections.FXCollections; var ObservableList = javafx.collections.ObservableList; var CategoryAxis   = javafx.scene.chart.CategoryAxis; var NumberAxis     = javafx.scene.chart.NumberAxis; var BarChart       = javafx.scene.chart.BarChart; var XYChart        = javafx.scene.chart.XYChart; var Series         = XYChart.Series; var Data           = XYChart.Data; function graph(stage, data) {     var root = new Group();     stage.scene = new Scene(root);     var dates = Object.keys(data);     var xAxis = new CategoryAxis();     xAxis.categories = FXCollections.observableArrayList(dates);     var yAxis = new NumberAxis("Tweets", 0.0, 200.0, 50.0);     var series = FXCollections.observableArrayList();     for (var date in data) {         series.add(new Data(date, data[date]));     }     var tweets = new Series("Tweets", series);     var barChartData = FXCollections.observableArrayList(tweets);     var chart = new BarChart(xAxis, yAxis, barChartData, 25.0);     root.children.add(chart); } I should point out that there is a lot of subtlety going on in the background.  For example; stage.scene = new Scene(root) is equivalent to stage.setScene(new Scene(root)). If Nashorn can't find a property (scene), then it searches (via Dynalink) for the Java Beans equivalent (setScene.)  Also note, that Nashorn is magically handling the generic class FXCollections.  Finally,  with the call to observableArrayList(dates), Nashorn is automatically converting the JavaScript array dates to a Java collection.  It really is hard to identify which objects are JavaScript and which are Java.  Does it really matter? Okay, with the meat out of the way, let's talk about the hoops. When working with JavaFX, you start with a main subclass of javafx.application.Application.  This class handles the initialization of the JavaFX libraries and the event processing.  This is what I used for this example; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import javafx.application.Application; import javafx.stage.Stage; import javax.script.ScriptEngine; import javax.script.ScriptEngineManager; import javax.script.ScriptException; public class TrendingMain extends Application { private static final ScriptEngineManager MANAGER = new ScriptEngineManager(); private final ScriptEngine engine = MANAGER.getEngineByName("nashorn"); private Trending trending; public static void main(String[] args) { launch(args); } @Override public void start(Stage stage) throws Exception { trending = (Trending) load("Trending.js"); trending.start(stage); } @Override public void stop() throws Exception { trending.stop(); } private Object load(String script) throws IOException, ScriptException { try (final InputStream is = TrendingMain.class.getResourceAsStream(script)) { return engine.eval(new InputStreamReader(is, "utf-8")); } } } To initialize Nashorn, we use JSR-223's javax.script.  private static final ScriptEngineManager MANAGER = new ScriptEngineManager(); private final ScriptEngine engine = MANAGER.getEngineByName("nashorn"); This code sets up an instance of the Nashorn engine for evaluating scripts. The  load method reads a script into memory and then gets engine to eval that script.  Note, that load also returns the result of the eval. Now for the fun part.  There are several different approaches we could use to communicate between the Java main and the script.  In this example we'll use a Java interface.  The JavaFX main needs to do at least start and stop, so the following will suffice as an interface; public interface Trending {     public void start(Stage stage) throws Exception;     public void stop() throws Exception; } At the end of the example's script we add; (function newTrending() {     return new Packages.Trending() {         start: function(stage) {             var data = getTrendingData();             graph(stage, data);             stage.show();         },         stop: function() {         }     } })(); which instantiates a new subclass instance of Trending and overrides the start and stop methods.  The result of this function call is what is returned to main via the eval. trending = (Trending) load("Trending.js"); To recap, the script Trending.js contains functions getTrendingData, graph and newTrending, plus the call at the end to newTrending.  Back in the Java code, we cast the result of the eval (call to newTrending) to Trending, thus, we end up with an object that we can then use to call back into the script.  trending.start(stage); Voila. ?

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  • PostgreSQL timezone does not match system timezone

    - by Martin C.
    I have several PostgreSQL 9.2 installations where the timezone used by PostgreSQL is GMT, despite the entire system being "Europe/Vienna". I double-checked that postgresql.conf does not contain timezone setting, so according to the documentation it should fallback to the system's timezone. However, # su -s /bin/bash postgres -c "psql mydb" mydb=# show timezone; TimeZone ---------- GMT (1 row) mydb=# select now(); now ------------------------------- 2013-11-12 08:14:21.697622+00 (1 row) Any hints, where the GMT timezone could come from? The system user does not have TZ set and the /etc/timezone and /etc/timeinfo seem to be configured correctly. # cat /etc/timezone Europe/Vienna # date Tue Nov 12 09:15:42 CET 2013 Any hints are appreciated, thanks in advance!

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  • Windows Server 2008 R2 DNS Server Intermittently Unresponsive

    - by Ablue
    Throughout the day out DNS servers (2x Win 2k8 R2 servers) are unable to respond to requests. The requests that fail are all on the .root zone that are either cached or obtained from 1 of 5 DNS servers we forward to before going to root hints. At first I thought the DNS servers we were forwarding to were flaky. So I added some more in. Currently the forwarding list looks like ISP DNS 1 OPEN DNS 1 ISP DNS 2 OPEN DNS 2 ISP DNS 3 I have tried: Turning off root hints. Set record scavenging to 7 days. Using dnscmd /config /EnableEDNSProbes 0 as per this. Packet capture at the DNS server shows that there is a lot of query responses with server failure between lan clients and the local dns server; it does not appear to be forwarding those requests. So maybe a problem with caching? Anyhow, does anything have anything I can try to get this working?

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  • Speed up SQL Server queries with PREFETCH

    - by Akshay Deep Lamba
    Problem The SAN data volume has a throughput capacity of 400MB/sec; however my query is still running slow and it is waiting on I/O (PAGEIOLATCH_SH). Windows Performance Monitor shows data volume speed of 4MB/sec. Where is the problem and how can I find the problem? Solution This is another summary of a great article published by R. Meyyappan at www.sqlworkshops.com.  In my opinion, this is the first article that highlights and explains with working examples how PREFETCH determines the performance of a Nested Loop join.  First of all, I just want to recall that Prefetch is a mechanism with which SQL Server can fire up many I/O requests in parallel for a Nested Loop join. When SQL Server executes a Nested Loop join, it may or may not enable Prefetch accordingly to the number of rows in the outer table. If the number of rows in the outer table is greater than 25 then SQL will enable and use Prefetch to speed up query performance, but it will not if it is less than 25 rows. In this section we are going to see different scenarios where prefetch is automatically enabled or disabled. These examples only use two tables RegionalOrder and Orders.  If you want to create the sample tables and sample data, please visit this site www.sqlworkshops.com. The breakdown of the data in the RegionalOrders table is shown below and the Orders table contains about 6 million rows. In this first example, I am creating a stored procedure against two tables and then execute the stored procedure.  Before running the stored proceudre, I am going to include the actual execution plan. --Example provided by www.sqlworkshops.com --Create procedure that pulls orders based on City --Do not forget to include the actual execution plan CREATE PROC RegionalOrdersProc @City CHAR(20) AS BEGIN DECLARE @OrderID INT, @OrderDetails CHAR(200) SELECT @OrderID = o.OrderID, @OrderDetails = o.OrderDetails       FROM RegionalOrders ao INNER JOIN Orders o ON (o.OrderID = ao.OrderID)       WHERE City = @City END GO SET STATISTICS time ON GO --Example provided by www.sqlworkshops.com --Execute the procedure with parameter SmallCity1 EXEC RegionalOrdersProc 'SmallCity1' GO After running the stored procedure, if we right click on the Clustered Index Scan and click Properties we can see the Estimated Numbers of Rows is 24.    If we right click on Nested Loops and click Properties we do not see Prefetch, because it is disabled. This behavior was expected, because the number of rows containing the value ‘SmallCity1’ in the outer table is less than 25.   Now, if I run the same procedure with parameter ‘BigCity’ will Prefetch be enabled? --Example provided by www.sqlworkshops.com --Execute the procedure with parameter BigCity --We are using cached plan EXEC RegionalOrdersProc 'BigCity' GO As we can see from the below screenshot, prefetch is not enabled and the query takes around 7 seconds to execute. This is because the query used the cached plan from ‘SmallCity1’ that had prefetch disabled. Please note that even if we have 999 rows for ‘BigCity’ the Estimated Numbers of Rows is still 24.   Finally, let’s clear the procedure cache to trigger a new optimization and execute the procedure again. DBCC freeproccache GO EXEC RegionalOrdersProc 'BigCity' GO This time, our procedure runs under a second, Prefetch is enabled and the Estimated Number of Rows is 999.   The RegionalOrdersProc can be optimized by using the below example where we are using an optimizer hint. I have also shown some other hints that could be used as well. --Example provided by www.sqlworkshops.com --You can fix the issue by using any of the following --hints --Create procedure that pulls orders based on City DROP PROC RegionalOrdersProc GO CREATE PROC RegionalOrdersProc @City CHAR(20) AS BEGIN DECLARE @OrderID INT, @OrderDetails CHAR(200) SELECT @OrderID = o.OrderID, @OrderDetails = o.OrderDetails       FROM RegionalOrders ao INNER JOIN Orders o ON (o.OrderID = ao.OrderID)       WHERE City = @City       --Hinting optimizer to use SmallCity2 for estimation       OPTION (optimize FOR (@City = 'SmallCity2'))       --Hinting optimizer to estimate for the currnet parameters       --option (recompile)       --Hinting optimize not to use histogram rather       --density for estimation (average of all 3 cities)       --option (optimize for (@City UNKNOWN))       --option (optimize for UNKNOWN) END GO Conclusion, this tip was mainly aimed at illustrating how Prefetch can speed up query execution and how the different number of rows can trigger this.

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  • Notes for a NetBeans IDE 7.4 HTML5 Screencast

    - by Geertjan
    I'm making a screencast that intends to thoroughly introduce NetBeans IDE 7.4 as a tool for HTML, JavaScript, and CSS developers. Here's the current outline, additions and other suggestions are welcome. Getting Started Downloading NetBeans IDE for HTML5 and PHP Examining the NetBeans installation directory, especially netbeans.conf Examining the NetBeans user directory Command line options for starting NetBeans IDE Exploring NetBeans IDE Menus and toolbars Versioning tools Options Window Go through whole Options window Change look and feels Adding themes Syntax coloring Code templates Plugin Manager and Plugin Portal Dark Look and Feel Themes Toggle line wrap Emmet HTML Tidy NetBeans Cheat Sheets Creating HTML5 projects From scratch From online template, e.g., Twitter Bootstrap From ZIP file From folder on disk From sample Editing Useful shortcuts Alt-Enter: see the current hints Alt-Shift-DOT/COMMA: expand selection (CTRL instead of Alt on Mac) Ctrl-Shift-Up/Down: copy up/down Alt-Shift-Up/Down: move up/down Alt-Insert: generate code (Lorum Ipsum) View menu | Show Non-printable Characters Source menu Show keyboard shortcut card Useful hints Surround with Tag Remove Surrounding Tag Useful code completion Link tag for CSS, show completion Script tag for JavaScript, show completion Create code templates in Options window Useful HTML Palette items Unordered List Link Useful code navigation Navigator Navigate menu Useful project settings Project-level deployment settings CSS Preprocessors (SASS/LESS) Cordova support Useful window management Dragging, minimizing, undocking Ctrl-Shift-Enter: distraction-free mode Alt-Shift Enter: maximization Debugging JavaScript debugger Deploying Embedded browser Responsive design Inspect in NetBeans mode Chrome browser with NetBeans plugin Android and iOS browsers Cordova makes native packages On device debugging On device styling Documentation PHP and HTML5 Learning Trail: https://netbeans.org/kb/trails/php.html Contributing Social Media: Twitter, Facebook, blogs Plugin Portal Planning to complete the above screencast this week, will continue editing this page as more useful features arise in my mind or hopefully in the comments in this blog entry!

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  • White box testing with Google Test

    - by Daemin
    I've been trying out using GoogleTest for my C++ hobby project, and I need to test the internals of a component (hence white box testing). At my previous work we just made the test classes friends of the class being tested. But with Google Test that doesn't work as each test is given its own unique class, derived from the fixture class if specified, and friend-ness doesn't transfer to derived classes. Initially I created a test proxy class that is friends with the tested class. It contains a pointer to an instance of the tested class and provides methods for the required, but hidden, members. This worked for a simple class, but now I'm up to testing a tree class with an internal private node class, of which I need to access and mess with. I'm just wondering if anyone using the GoogleTest library has done any white box testing and if they have any hints or helpful constructs that would make this easier. Ok, I've found the FRIEND_TEST macro defined in the documentation, as well as some hints on how to test private code in the advanced guide. But apart from having a huge amount of friend declerations (i.e. one FRIEND_TEST for each test), is there an easier idion to use, or should I abandon using GoogleTest and move to a different test framework?

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  • Achieve Named Criteria with multiple tables in EJB Data control

    - by Deepak Siddappa
    In EJB create a named criteria using sparse xml and in named criteria wizard, only attributes related to the that particular entities will be displayed.  So here we can filter results only on particular entity bean. Take a scenario where we need to create Named Criteria based on multiple tables using EJB. In BC4J we can achieve this by creating view object based on multiple tables. So in this article, we will try to achieve named criteria based on multiple tables using EJB.Implementation StepsCreate Java EE Web Application with entity based on Departments and Employees, then create a session bean and data control for the session bean.Create a Java Bean, name as CustomBean and add below code to the file. Here in java bean from both Departments and Employees tables three fields are taken. public class CustomBean { private BigDecimal departmentId; private String departmentName; private BigDecimal locationId; private BigDecimal employeeId; private String firstName; private String lastName; public CustomBean() { super(); } public void setDepartmentId(BigDecimal departmentId) { this.departmentId = departmentId; } public BigDecimal getDepartmentId() { return departmentId; } public void setDepartmentName(String departmentName) { this.departmentName = departmentName; } public String getDepartmentName() { return departmentName; } public void setLocationId(BigDecimal locationId) { this.locationId = locationId; } public BigDecimal getLocationId() { return locationId; } public void setEmployeeId(BigDecimal employeeId) { this.employeeId = employeeId; } public BigDecimal getEmployeeId() { return employeeId; } public void setFirstName(String firstName) { this.firstName = firstName; } public String getFirstName() { return firstName; } public void setLastName(String lastName) { this.lastName = lastName; } public String getLastName() { return lastName; } } Open the sessionEJb file and add the below code to the session bean and expose the method in local/remote interface and generate a data control for that. Note:- Here in the below code "em" is a EntityManager. public List<CustomBean> getCustomBeanFindAll() { String queryString = "select d.department_id, d.department_name, d.location_id, e.employee_id, e.first_name, e.last_name from departments d, employees e\n" + "where e.department_id = d.department_id"; Query genericSearchQuery = em.createNativeQuery(queryString, "CustomQuery"); List resultList = genericSearchQuery.getResultList(); Iterator resultListIterator = resultList.iterator(); List<CustomBean> customList = new ArrayList(); while (resultListIterator.hasNext()) { Object col[] = (Object[])resultListIterator.next(); CustomBean custom = new CustomBean(); custom.setDepartmentId((BigDecimal)col[0]); custom.setDepartmentName((String)col[1]); custom.setLocationId((BigDecimal)col[2]); custom.setEmployeeId((BigDecimal)col[3]); custom.setFirstName((String)col[4]); custom.setLastName((String)col[5]); customList.add(custom); } return customList; } Open the DataControls.dcx file and create sparse xml for customBean. In sparse xml navigate to Named criteria tab -> Bind Variable section, create two binding variables deptId,fName. In sparse xml navigate to Named criteria tab ->Named criteria, create a named criteria and map the query attributes to the bind variables. In the ViewController create a file jspx page, from data control palette drop customBeanFindAll->Named Criteria->CustomBeanCriteria->Query as ADF Query Panel with Table. Run the jspx page and enter values in search form with departmentId as 50 and firstName as "M". Named criteria will filter the query of a data source and display the result like below.

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  • T-SQL in Chicago – the LobsterPot teams with DataEducation

    - by Rob Farley
    In May, I’ll be in the US. I have board meetings for PASS at the SQLRally event in Dallas, and then I’m going to be spending a bit of time in Chicago. The big news is that while I’m in Chicago (May 14-16), I’m going to teach my “Advanced T-SQL Querying and Reporting: Building Effectiveness” course. This is a course that I’ve been teaching since the 2005 days, and have modified over time for 2008 and 2012. It’s very much my most popular course, and I love teaching it. Let me tell you why. For years, I wrote queries and thought I was good at it. I was a developer. I’d written a lot of C (and other, more fun languages like Prolog and Lisp) at university, and then got into the ‘real world’ and coded in VB, PL/SQL, and so on through to C#, and saw SQL (whichever database system it was) as just a way of getting the data back. I could write a query to return just about whatever data I wanted, and that was good. I was better at it than the people around me, and that helped. (It didn’t help my progression into management, then it just became a frustration, but for the most part, it was good to know that I was good at this particular thing.) But then I discovered the other side of querying – the execution plan. I started to learn about the translation from what I’d written into the plan, and this impacted my query-writing significantly. I look back at the queries I wrote before I understood this, and shudder. I wrote queries that were correct, but often a long way from effective. I’d done query tuning, but had largely done it without considering the plan, just inferring what indexes would help. This is not a performance-tuning course. It’s focused on the T-SQL that you read and write. But performance is a significant and recurring theme. Effective T-SQL has to be about performance – it’s the biggest way that a query becomes effective. There are other aspects too though – such as using constructs better. For example – I can write code that modifies data nicely, but if I haven’t learned about the MERGE statement and the way that it can impact things, I’m missing a few tricks. If you’re going to do this course, a good place to be is the situation I was in a few years before I wrote this course. You’re probably comfortable with writing T-SQL queries. You know how to make a SELECT statement do what you need it to, but feel there has to be a better way. You can write JOINs easily, and understand how to use LEFT JOIN to make sure you don’t filter out rows from the first table, but you’re coding blind. The first module I cover is on Query Execution. Take a look at the Course Outline at Data Education’s website. The first part of the first module is on the components of a SELECT statement (where I make you think harder about GROUP BY than you probably have before), but then we jump straight into Execution Plans. Some stuff on indexes is in there too, as is simplification and SARGability. Some of this is stuff that you may have heard me present on at conferences, but here you have me for three days straight. I’m sure you can imagine that we revisit these topics throughout the rest of the course as well, and you’d be right. In the second and third modules we look at a bunch of other aspects, including some of the T-SQL constructs that lots of people don’t know, and various other things that can help your T-SQL be, well, more effective. I’ve had quite a lot of people do this course and be itching to get back to work even on the first day. That’s not a comment about the jokes I tell, but because people want to look at the queries they run. LobsterPot Solutions is thrilled to be partnering with Data Education to bring this training to Chicago. Visit their website to register for the course. @rob_farley

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  • Looking under the hood of SSRS

    - by Jim Giercyk
    SSRS is a powerful tool, but there is very little available to measure it’s performance or view the SSRS execution log or catalog in detail.  Here are a few simple queries that will give you insight to the system that you never had before.   ACTIVE REPORTS:  Have you ever seen your SQL Server performance take a nose dive due to a long-running report?  If the SPID is executing under a generic Report ID, or it is a scheduled job, you may have no way to tell which report is killing your server.  Running this query will show you which reports are executing at a given time, and WHO is executing them.   USE ReportServerNative SELECT runningjobs.computername,             runningjobs.requestname,              runningjobs.startdate,             users.username,             Datediff(s,runningjobs.startdate, Getdate()) / 60 AS    'Active Minutes' FROM runningjobs INNER JOIN users ON runningjobs.userid = users.userid ORDER BY runningjobs.startdate               SSRS CATALOG:  We have all asked “What was the last thing that changed”, or better yet, “Who in the world did that!”.  Here is a query that will show all of the reports in your SSRS catalog, when they were created and changed, and by who.           USE ReportServerNative SELECT DISTINCT catalog.PATH,                            catalog.name,                            users.username AS [Created By],                             catalog.creationdate,                            users_1.username AS [Modified By],                            catalog.modifieddate FROM catalog         INNER JOIN users ON catalog.createdbyid = users.userid  INNER JOIN users AS users_1 ON catalog.modifiedbyid = users_1.userid INNER JOIN executionlogstorage ON catalog.itemid = executionlogstorage.reportid WHERE ( catalog.name <> '' )               SSRS EXECUTION LOG:  Sometimes we need to know what was happening on the SSRS report server at a given time in the past.  This query will help you do just that.  You will need to set the timestart and timeend in the WHERE clause to suit your needs.         USE ReportServerNative SELECT catalog.name AS report,        executionlogstorage.username AS [User],        executionlogstorage.timestart,        executionlogstorage.timeend,         Datediff(mi,e.timestart,e.timeend) AS ‘Time In Minutes',        catalog.modifieddate AS [Report Last Modified],        users.username FROM   catalog  (nolock)        INNER JOIN executionlogstorage e (nolock)          ON catalog.itemid = executionlogstorage.reportid        INNER JOIN users (nolock)          ON catalog.modifiedbyid = users.userid WHERE  executionlogstorage.timestart >= Dateadd(s, -1, '03/31/2012')        AND executionlogstorage.timeend <= Dateadd(DAY, 1, '04/02/2012')      LONG RUNNING REPORTS:  This query will show the longest running reports over a given time period.  Note that the “>5” in the WHERE clause sets the report threshold at 5 minutes, so anything that ran less than 5 minutes will not appear in the result set.  Adjust the threshold and start/end times to your liking.  With this information in hand, you can better optimize your system by tweaking the longest running reports first.         USE ReportServerNative SELECT executionlogstorage.instancename,        catalog.PATH,        catalog.name,        executionlogstorage.username,        executionlogstorage.timestart,        executionlogstorage.timeend,        Datediff(mi, e.timestart, e.timeend) AS 'Minutes',        executionlogstorage.timedataretrieval,        executionlogstorage.timeprocessing,        executionlogstorage.timerendering,        executionlogstorage.[RowCount],        users_1.username        AS createdby,        CONVERT(VARCHAR(10), catalog.creationdate, 101)        AS 'Creation Date',        users.username        AS modifiedby,        CONVERT(VARCHAR(10), catalog.modifieddate, 101)        AS 'Modified Date' FROM   executionlogstorage e         INNER JOIN catalog          ON executionlogstorage.reportid = catalog.itemid        INNER JOIN users          ON catalog.modifiedbyid = users.userid        INNER JOIN users AS users_1          ON catalog.createdbyid = users_1.userid WHERE  ( e.timestart > '03/31/2012' )        AND ( e.timestart <= '04/02/2012' )        AND  Datediff(mi, e.timestart, e.timeend) > 5        AND catalog.name <> '' ORDER  BY 'Minutes' DESC        I have used these queries to build SSRS reports that I can refer to quickly, and export to Excel if I need to report or quantify my findings.  I encourage you to look at the data in the ReportServerNative database on your report server to understand the queries and create some of your own.  For instance, you may want a query to determine which reports are using which shared data sources.  Work smarter, not harder!

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  • SEO non-English domain name advice

    - by Dominykas Mostauskis
    I'm starting a website, that is meant for a non-English region, using an alphabet that is a bit different than that of English. Current plan is as follows. The website name, and the domain name, will be in the local language (not English); however, domain name will be spelled in the English alphabet, while the website's title will be the same word(s), but spelled properly with accents. E.g.: 'www.litterat.fr' and 'Littérat'. Does the difference between domain name and website name character use influence the site's SEO? Is it better, SEO-wise, to choose a name that can be spelled the same way in the English alphabet? From my experience, when searching online, invariably, the English alphabet is used, no matter the language, so people will still be searching 'litterat' (without accents and such). Edit: To sum up: Things have been said about IDN (Internationalized domain name). To make it simple, they are second-level domain names that contain language specific characters (LSP)(e.g. www.café.fr). Here you can check what top-level domains support what LSPs. Check initall's answer for more info on using LSPs in paths and queries. To answer my question about how and if search engines relate keywords spelled with and without language specific characters: Google can potentially tell that series and séries is the same keyword. However, (most relevant for words that are spelled differently across languages and have different meanings, like séries), for Google to make the connection (or lack thereof) between e and é, it has to deduce two things: Language that you are searching in. Language of your query. You can specify it manually through Advanced search or it guesses it, sometimes. I presume it can guess it wrong too. The more keywords specific to this language you use the higher Google's chance to guess the language. Language of the crawled document, against which the ASCII version of the word will be compared (in this example – series). Again, check initall's answer for how to help Google in understanding what language your document is in. Once it has that it can tell whether or not these two spellings should be treated as the same keyword. Google has to understand that even though you're not using french (in this example) specific characters, you're searching in French. The reason why I used the french word séries in this example, is that it demonstrates this very well. You have it in French and you have it in English without the accent. So if your search query is ambiguous like our series, unless Google has something more to go on, it will presume that there's no correlation between your search and séries in French documents. If you augment your query to series romantiques (try it), Google will understand that you're searching in French and among your results you'll see séries as well. But this does not always work, you should test it out with your keywords first. For example, if you search series francaises, it will associate francaises with françaises, but it will not associate series with séries. It depends on the words. Note: worth stressing that this problem is very relevant to words that, written in plain ASCII, might have some other meanings in other languages, it is less relevant to words that can be, by a distinct margin, just some one language. Tip: I've noticed that sometimes even if my non-accented search query doesn't get associated with the properly spelled word in a document (especially if it's the title or an important keyword in the doc), it still comes up. I followed the link, did a Ctrl-F search for my non-accented search query and found nothing, then checked the meta-tags in the source and you had the page's title in both accented and non-accented forms. So if you have meta-tags that can be spelled with language specific characters and without, put in both. Footnote: I hope this helps. If you have anything to add or correct, go ahead.

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  • PASS Summit 2011 &ndash; Part II

    - by Tara Kizer
    I arrived in Seattle last Monday afternoon to attend PASS Summit 2011.  I had really wanted to attend Gail Shaw’s (blog|twitter) and Grant Fritchey’s (blog|twitter) pre-conference seminar “All About Execution Plans” on Monday, but that would have meant flying out on Sunday which I couldn’t do.  On Tuesday, I attended Allan Hirt’s (blog|twitter) pre-conference seminar entitled “A Deep Dive into AlwaysOn: Failover Clustering and Availability Groups”.  Allan is a great speaker, and his seminar was packed with demos and information about AlwaysOn in SQL Server 2012.  Unfortunately, I have lost my notes from this seminar and the presentation materials are only available on the pre-con DVD.  Hmpf! On Wednesday, I attended Gail Shaw’s “Bad Plan! Sit!”, Andrew Kelly’s (blog|twitter) “SQL 2008 Query Statistics”, Dan Jones’ (blog|twitter) “Improving your PowerShell Productivity”, and Brent Ozar’s (blog|twitter) “BLITZ! The SQL – More One Hour SQL Server Takeovers”.  In Gail’s session, she went over how to fix bad plans and bad query patterns.  Update your stale statistics! How to fix bad plans Use local variables – optimizer can’t sniff it, so it’ll optimize for “average” value Use RECOMPILE (at the query or stored procedure level) – CPU hit OPTIMIZE FOR hint – most common value you’ll pass How to fix bad query patterns Don’t use them – ha! Catch-all queries Use dynamic SQL OPTION (RECOMPILE) Multiple execution paths Split into multiple stored procedures OPTION (RECOMPILE) Modifying parameter values Use local variables Split into outer and inner procedure OPTION (RECOMPILE) She also went into “last resort” and “very last resort” options, but those are risky unless you know what you are doing.  For the average Joe, she wouldn’t recommend these.  Examples are query hints and plan guides. While I enjoyed Andrew’s session, I didn’t take any notes as it was familiar material.  Andrew is a great speaker though, and I’d highly recommend attending his sessions in the future. Next up was Dan’s PowerShell session.  I need to look into profiles, manifests, function modules, and function import scripts more as I just didn’t quite grasp these concepts.  I am attending a PowerShell training class at the end of November, so maybe that’ll help clear it up.  I really enjoyed the Excel integration demo.  It was very cool watching PowerShell build the spreadsheet in real-time.  I must look into this more!  On a side note, I am jealous of Dan’s hair.  Fabulous hair! Brent’s session showed us how to quickly gather information about a server that you will be taking over database administration duties for.  He wrote a script to do a fast health check and then later wrapped it into a stored procedure, sp_Blitz.  I can’t wait to use this at my work even on systems where I’ve been the primary DBA for years, maybe there’s something I’ve overlooked.  We are using EPM to help standardize our environment and uncover problems, but sp_Blitz will definitely still help us out.  He even provides a cloud-based update feature, sp_BlitzUpdate, for sp_Blitz so you don’t have to constantly update it when he makes a change.  I think I’ll utilize his update code for some other challenges that we face at my work.

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  • White box testing with Google Test

    - by Daemin
    I've been trying out using GoogleTest for my C++ hobby project, and I need to test the internals of a component (hence white box testing). At my previous work we just made the test classes friends of the class being tested. But with Google Test that doesn't work as each test is given its own unique class, derived from the fixture class if specified, and friend-ness doesn't transfer to derived classes. Initially I created a test proxy class that is friends with the tested class. It contains a pointer to an instance of the tested class and provides methods for the required, but hidden, members. This worked for a simple class, but now I'm up to testing a tree class with an internal private node class, of which I need to access and mess with. I'm just wondering if anyone using the GoogleTest library has done any white box testing and if they have any hints or helpful constructs that would make this easier. Ok, I've found the FRIEND_TEST macro defined in the documentation, as well as some hints on how to test private code in the advanced guide. But apart from having a huge amount of friend declerations (i.e. one FRIEND_TEST for each test), is there an easier idion to use, or should I abandon using GoogleTest and move to a different test framework?

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  • How views are changing in future versions of SQL

    - by Rob Farley
    April is here, and this weekend, SQL v11.0 (previous known as Denali, now known as SQL Server 2012) reaches general availability. And so I thought I’d share some news about what’s coming next. I didn’t hear this at the MVP Summit earlier this year (where there was lots of NDA information given, but I didn’t go), so I think I’m free to share it. I’ve written before about CTEs being query-scoped views. Well, the actual story goes a bit further, and will continue to develop in future versions. A CTE is a like a “temporary temporary view”, scoped to a single query. Due to globally-scoped temporary objects using a two-hashes naming style, and session-scoped (or ‘local’) temporary objects a one-hash naming style, this query-scoped temporary object uses a cunning zero-hash naming style. We see this implied in Books Online in the CREATE TABLE page, but as we know, temporary views are not yet supported in the SQL Server. However, in a breakaway from ANSI-SQL, Microsoft is moving towards consistency with their naming. We know that a CTE is a “common table expression” – this is proving to be a more strategic than you may have appreciated. Within the Microsoft product group, the term “Table Expression” is far more widely used than just CTEs. Anything that can be used in a FROM clause is referred to as a Table Expression, so long as it doesn’t actually store data (which would make it a Table, rather than a Table Expression). You can see this is not just restricted to the product group by doing an internet search for how the term is used without ‘common’. In the past, Books Online has referred to a view as a “virtual table” (but notice that there is no SQL 2012 version of this page). However, it was generally decided that “virtual table” was a poor name because it wasn’t completely accurate, and it’s typically accepted that virtualisation and SQL is frowned upon. That page I linked to says “or stored query”, which is slightly better, but when the SQL 2012 version of that page is actually published, the line will be changed to read: “A view is a stored table expression (STE)”. This change will be the first of many. During the SQL 2012 R2 release, the keyword VIEW will become deprecated (this will be SQL v11 SP1.5). Three versions later, in SQL 14.5, you will need to be in compatibility mode 140 to allow “CREATE VIEW” to work. Also consistent with Microsoft’s deprecation policy, the execution of any query that refers to an object created as a view (rather than the new “CREATE STE”), will cause a Deprecation Event to fire. This will all be in preparation for the introduction of Single-Column Table Expressions (to be introduced in SQL 17.3 SP6) which will finally shut up those people waiting for a decent implementation of Inline Scalar Functions. And of course, CTEs are “Common” because the Table Expression definition needs to be repeated over and over throughout a stored procedure. ...or so I think I heard at some point. Oh, and congratulations to all the new MVPs on this April 1st. @rob_farley

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  • Oracle OpenWorld 2012

    - by Maria Colgan
    I can't believe it's time for OpenWorld again! Oracle OpenWorld is the largest gathering of Oracle customers, partners, developers, and technology enthusiasts. This year it will take place between September 30th and October 4th in San Francisco. Of course, the Optimizer development group will be there and you will have multiple opportunities to meet the team, in one of our technical sessions, or at the Oracle Database demogrounds. This year the Optimizer team has 2 technical sessions, as well as a booth in the Oracle Database demogrounds. Tuesday, October 2nd at 1:15pm Oracle Optimizer: Harnessing the Power of Optimizer Hints Session CON8455 at Moscone South - room 103 In this session we will discuss in detail how optimizer hints are interpreted, when they should be used, and why they sometimes appear to be ignored. Thursday, October 4th at 12:45pm Oracle Optimizer: An Insider’s View of How the Optimizer Works Session CON8457 at Moscone South - room 104This session explains how the latest version of the optimizer works and the best ways you can influence its decisions to ensure you get optimal execution every time. It will also include a full history of the Cost Based Optimizer, so make sure you stick around for this one! If you have burning Optimizer or statistics related questions, or if you just want to pick up an Optimizer bumper sticker, you can stop by the Optimizer demo booth. This year we are located in booth 3157, in the Database area of the demogrounds, in Moscone South. Members of the Optimizer development team will be there Monday through Wednesday from 9:45 am until 6pm. The full Oracle OpenWorld catalog is on-line, or you can browse by speakers by name. So start planning your trip today! +Maria Colgan

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  • HTML Tidy in NetBeans IDE (Part 2)

    - by Geertjan
    This is what I was aiming for in the previous blog entry: What you can see above (especially if you click to enlarge it) is that I have HTML Tidy integrated into the NetBeans analyzer functionality, which is pluggable from 7.2 onwards. Well, if you set an implementation dependency on "Static Analysis Core", since it's not an official API yet. Also, the scopes of the analyzer functionality are not pluggable. That means you can 'only' set the analyzer's scope to one or more projects, one or more packages, or one or more files. Not one or more folders, which means you can't have a bunch off HTML files in a folder that you access via the Favorites window and then run the analyzer on that folder (or on multiple folders). Thus, to try out my new code, I had to put some HTML files into a package inside a Java application. Then I chose that package as the scope of the analyzer. Then I ran all the analyzers (i.e., standard NetBeans Java hints, FindBugs, as well as my HTML Tidy extension) on that package. The screenshot above is the result. Here's all the code for the above, which is a port of the Action code from the previous blog entry into a new Analyzer implementation: import java.io.IOException; import java.io.PrintWriter; import java.io.StringWriter; import java.util.ArrayList; import java.util.Collections; import java.util.List; import javax.swing.JComponent; import javax.swing.text.Document; import org.netbeans.api.fileinfo.NonRecursiveFolder; import org.netbeans.modules.analysis.spi.Analyzer; import org.netbeans.modules.analysis.spi.Analyzer.AnalyzerFactory; import org.netbeans.modules.analysis.spi.Analyzer.Context; import org.netbeans.modules.analysis.spi.Analyzer.CustomizerProvider; import org.netbeans.modules.analysis.spi.Analyzer.WarningDescription; import org.netbeans.spi.editor.hints.ErrorDescription; import org.netbeans.spi.editor.hints.ErrorDescriptionFactory; import org.netbeans.spi.editor.hints.Severity; import org.openide.cookies.EditorCookie; import org.openide.filesystems.FileObject; import org.openide.loaders.DataObject; import org.openide.util.Exceptions; import org.openide.util.lookup.ServiceProvider; import org.w3c.tidy.Tidy; public class TidyAnalyzer implements Analyzer {     private final Context ctx;     private TidyAnalyzer(Context cntxt) {         this.ctx = cntxt;     }     @Override     public Iterable<? extends ErrorDescription> analyze() {         List<ErrorDescription> result = new ArrayList<ErrorDescription>();         for (NonRecursiveFolder sr : ctx.getScope().getFolders()) {             FileObject folder = sr.getFolder();             for (FileObject fo : folder.getChildren()) {                 for (ErrorDescription ed : doRunHTMLTidy(fo)) {                     if (fo.getMIMEType().equals("text/html")) {                         result.add(ed);                     }                 }             }         }         return result;     }     private List<ErrorDescription> doRunHTMLTidy(FileObject sr) {         final List<ErrorDescription> result = new ArrayList<ErrorDescription>();         Tidy tidy = new Tidy();         StringWriter stringWriter = new StringWriter();         PrintWriter errorWriter = new PrintWriter(stringWriter);         tidy.setErrout(errorWriter);         try {             Document doc = DataObject.find(sr).getLookup().lookup(EditorCookie.class).openDocument();             tidy.parse(sr.getInputStream(), System.out);             String[] split = stringWriter.toString().split("\n");             for (String string : split) {                 //Bit of ugly string parsing coming up:                 if (string.startsWith("line")) {                     final int end = string.indexOf(" c");                     int lineNumber = Integer.parseInt(string.substring(0, end).replace("line ", ""));                     string = string.substring(string.indexOf(": ")).replace(":", "");                     result.add(ErrorDescriptionFactory.createErrorDescription(                             Severity.WARNING,                             string,                             doc,                             lineNumber));                 }             }         } catch (IOException ex) {             Exceptions.printStackTrace(ex);         }         return result;     }     @Override     public boolean cancel() {         return true;     }     @ServiceProvider(service = AnalyzerFactory.class)     public static final class MyAnalyzerFactory extends AnalyzerFactory {         public MyAnalyzerFactory() {             super("htmltidy", "HTML Tidy", "org/jtidy/format_misc.gif");         }         public Iterable<? extends WarningDescription> getWarnings() {             return Collections.EMPTY_LIST;         }         @Override         public <D, C extends JComponent> CustomizerProvider<D, C> getCustomizerProvider() {             return null;         }         @Override         public Analyzer createAnalyzer(Context cntxt) {             return new TidyAnalyzer(cntxt);         }     } } The above only works on packages, not on projects and not on individual files.

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  • cx_Oracle.DatabaseError: ORA-01036: illegal variable name/number

    - by Joao Figueiredo
    I've a cron scheduled query which is failing with, File "./run_ora_query.py", line 69, in db_lookup cursor.execute(query, dict(time_key=time_key) ) cx_Oracle.DatabaseError: ORA-01036: illegal variable name/number where >>> dict(time_key=time_key) {'time_key': '12/10/2012 19:12:00'} I'm using a .yaml file to update the last time_key after each query runs, where the relevant parameters are, {query: 'select session_mode, inst_id, user_name, schema_name, os_user, process_id, process_mb_use, process_name, to_char(datet,''dd-mm-yyyy hh24:mi'') as DATETIME from os_admin.mem_usage where data > TO_DATE(:time_key,''dd-mm-yyyy hh24:mi:ss'') order by datet, inst_id, os_user', time_key: '12/10/2012 19:12:00'} Where is the culprit for this error?

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  • i get the exception org.hibernate.MappingException: No Dialect mapping for JDBC type: -9

    - by ramesh m
    i am using hibernate .i wrote Native sql query. this query will be execute in sqlSever command promt try { session=HibernateUtil.getInstance().getSession(); transaction=session.beginTransaction(); SQLQuery query = session.createSQLQuery("SELECT AP.PROJECT_NAME, AP.SKILLSET, PA.START_DATE, PA.END_DATE, RS.EMPLOYEE_ID, RS.EMPLOYEE_NAME, RS.REPORTING_PM FROM RESOURCE_MASTER RS,SHARED_PROPOSAL S, ACTUAL_PROPOSAL AP, PROJECT_APPROVED PA, PROJECT_ALLOCATION PL WHERE RS.EMPLOYEE_ID = PL.EMPLOYEE_ID AND PA.PROJECT_ID = PL.PROJECT_ID AND PA.SHARED_PROPOSAL_ID = S.SHARED_PROPOSAL_ID AND S.ACTUAL_PROPOSAL_ID=AP.ACTUAL_PROPOSAL_ID"); List<Object[]> obj=query.list(); Object[] object=new Object[arrayList.size()]; for (int i = 0; i < arrayList.size(); i++) { object[i]=arrayList.get(i); System.out.println(object[i]); } arrayList.get(0); String name=(String)arrayList.get(0); logger.info("In find All searchDeveloper"); }catch(Exception exception) { throw new PPAMException("Contact admin","Problem retrieving resource master list",exception); } like that i am using on that time i got this Exception: org.hibernate.MappingException: No Dialect mapping for JDBC type: -9 this query is executed in sqlserver command propt , i maaped seven tables, but remove ACTUAL_PROPOSAL AP table .it is execute correctly please help me

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  • ASP.NET MVC Html.BeginRouteForm render's action with problem

    - by Sadegh
    hi, i defined this route: context.MapRoute("SearchEngineWebSearch", "{culture}/{style}/search/web/{query}/{index}/{size}", new { controller = "search", action = "web", query = "", index = 0, size = 5 }, new { index = new UInt32RouteConstraint(), size = new UInt32RouteConstraint() }); and form to post parameter to that: <% using (Html.BeginRouteForm("SearchEngineWebSearch", FormMethod.Post)) { %> <input name="query" type="text" value="<%: ViewData["Query"]%>" class="search-field" /> <input type="submit" value="Search" class="search-button" /> <%} %> but form rendered with problem. why? thanks in advance ;)

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