SQL Developer Optimization

I have a few questions about SQL Developer that I was wondering if someone can help with:
1. Does SQL Developer have the sql optimization feature that is present in Toad?
Within TOAD, there is a facility that will help the user to optimize the sql and I was wondering if this was present in SQL Developer
2. When using the compare facility for showing the difference between 2 tables, does SQL Developer show the data that is different?
Thanks

K,
There are a couple of project in the works for this. Heres a quick exert of what we are planning. There is no confirmed release train for this at the minute though. This is provided for information only.
SQL Code Advisor*
By leveraging database features like Automated Workload Repository (AWR) and Active Session History (ASH), the potential exists to evaluate any SQL statement within a package or worksheet that has been executed and flag any statements exceeding some performance threshold. The developer will then immediately know if the SQL in question merits any tuning effort or should be left "as is".
The goal of SQL Code Advisor is to provide real-time feedback to developer within an editor or worksheet on factors which may impact performance. Without going into great detail in this overview, here are some:
* Connected to database instance with missing system statistics
* SQL references tables and indexes with missing or stale statistics, or indexes in an invalid state
* Population and cardinality estimates of referenced tables
* Type, compression status, cache status, degree of parallelism for referenced tables
* Explain plan indicates Full Table Scan performed on a large table
* Explicit datatype conversions of columns in predicates, preventing use of available indexes
SQL Tuning Advisor*
By leveraging existing database APIs in the DBMS_SQLTUNE and DBMS_ADVISOR packages, with appropriate UI enhancements, this SQL Tuning Advisor extension will allow a developer to generate a report to warn when SQL performance may be impaired by:
* stale optimizer statistics
* missing indexes
* improper coding practices.
These APIs are able to perform more in-depth analyses of SQL statements than the optimizer. As a consequence, in addition to offering advice on specific environment and coding issues, it can produce a SQL Profile. The Profile contains additional statistics which help the optimizer find a more efficient execution plan. The original execution plan can be presented side-by-side with the enhanced SQL Profile-assisted execution plan for comparison. The developer has control over which, if any, of the recommendations to accept and deploy.

Similar Messages

Explain plan results are different in SQL Developer than SQL Plus

My Environment:
SQL Developer 1.0.0.15.27
Platform where SQL Developer is running: Windows XP 2002 SP2
Oracle Database and Client 9.2.0.7
Optimizer_mode: FIRST_ROWS
I have the following SQL statement:
SELECT a1.comp_id
FROM temp_au_company a0, au_company a1
WHERE :b2 = a0.temp_emp_code
AND a0.comp_id = a1.comp_id
AND a0.sls_terr_code != a1.sls_terr_code
AND a1.last_mdfy_date > :b1
When I run an Explain in SQL Developer I get the following access path (which is the one I really want):
SELECT STATEMENT TABLE ACCESS(BY INDEX ROWID) FEDLINK.AU_COMPANY NESTED LOOPS INDEX(RANGE SCAN)
FEDLINK.UX2_TEMP_AU_COMPANY
INDEX(RANGE SCAN) FEDLINK.PX1_COMPANY
However, when I execute the statement with sql_trace turned on and use tkprof to generate the actual access path, the statement executes as follows (which is WAY more expensive):
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 1 3.58 6.68 28136 29232 0 0
total 3 3.58 6.69 28136 29232 0 0
Misses in library cache during parse: 1
Optimizer goal: FIRST_ROWS
Parsing user id: 979 (FEDLINK) (recursive depth: 1)
Rows Row Source Operation
0 NESTED LOOPS
0 TABLE ACCESS FULL AU_COMPANY
0 INDEX RANGE SCAN UX2_TEMP_AU_COMPANY (object id 49783)
Notice the FULL access of au_company.
I understand that SQL Developer has nothing to do with why the statement executed the way it did, but why is the Explain in SQL Developer different than the actual execution plan?
Added note....when I run the explain in SQL Plus it is the same as the actual execution. Here is the explain from SQL Plus:
explain plan for SELECT a1.comp_id
FROM temp_au_company a0, au_company a1
WHERE '1' = a0.temp_emp_code
AND a0.comp_id = a1.comp_id
AND a0.sls_terr_code != a1.sls_terr_code
AND a1.last_mdfy_date > '01-MAY-2006';
PLAN_TABLE_OUTPUT
| Id | Operation | Name | Rows | Bytes | Cost |
| 0 | SELECT STATEMENT | | 2 | 76 | 2597 |
| 1 | NESTED LOOPS | | 2 | 76 | 2597 |
| 2 | TABLE ACCESS FULL | AU_COMPANY | 2 | 42 | 2595 |
| 3 | INDEX RANGE SCAN | UX2_TEMP_AU_COMPANY | 1 | 17 | 2
Thanks,
Brenda

The explain is different (full scan of au_company in SQL Plus / index access in SQL Developer) even when I use variables in SQL Plus. Here is the output for SQL Plus using variables instead of literals:
SQL> variable b1 varchar2
SQL> variable b2 char
SQL> explain plan for SELECT a1.comp_id
2 FROM temp_au_company a0, au_company a1
3 WHERE :b2 = a0.temp_emp_code
4 AND a0.comp_id = a1.comp_id
5 AND a0.sls_terr_code != a1.sls_terr_code
6 AND a1.last_mdfy_date > :b1
7 /
Explained.
PLAN_TABLE_OUTPUT
| Id | Operation | Name | Rows | Bytes | Cost |
| 0 | SELECT STATEMENT | | 3184 | 118K| 2995 |
| 1 | HASH JOIN | | 3184 | 118K| 2995 |
| 2 | INDEX RANGE SCAN | UX2_TEMP_AU_COMPANY | 3187 | 54179 | 3 |
| 3 | TABLE ACCESS FULL | AU_COMPANY | 24009 | 492K| 2983 |
Any other ideas? They should be the same.
Brenda

How to configure Oracle Sql Developer for 9i

Hi,
We are using oracle 9i for existing application, and i am trying to connect oracle 9i through SQL developer 1.5.1, i got an error message "Unsupported Oracle Database Version".
Appreciate if any body guide me in this.
regards
Husal.

After removing dictionary statistics with dbms_stats.delete_schema_stats(ownname => 'SYS') I noticed the initial SQL Developer object list query became very slow.
Removal of dictionary statistics increased the predicted Oracle optimizer (CBO) costs. Previous SYS statistics were collected perhaps without realising the consequences.
You may wish to try dbms_stats.gather_schema_stats(ownname => 'SYS', method_opt => 'FOR ALL COLUMNS SIZE AUTO', sample_size => dbms_stats.auto_sample_size).
Recent Oracle 10G versions include a gather_dictionary_stats routine.
Suggest you try this on a development DB first.

AUTOTRACE stats different in SQL Developer vs SQL Plus

Using SQL Developer 3.2.20.09, database is 11.2 on Linux. I'd like to know why I get different stats when using AUTOTRACE in SQL Developer vs SQL Plus. If I do the following in SQL Developer and in SQL Plus I get a very different set of stats:
set autotrace on
select * from emp;
set autotrace off
I run this with "run worksheet" in SQL Developer and I see this set of stats:
Statistics
4 user calls
0 physical read total multi block requests
0 physical read total bytes
0 cell physical IO interconnect bytes
0 commit cleanout failures: block lost
0 IMU commits
0 IMU Flushes
0 IMU contention
0 IMU bind flushes
0 IMU mbu flush
I do the same in SQL Plus and I see these stats:
Statistics
0 recursive calls
0 db block gets
7 consistent gets
0 physical reads
0 redo size
1722 bytes sent via SQL*Net to client
519 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
14 rows processed
A very different set of stats. The stats in shown in SQL Plus seem to be much more useful to performance optimization over the one shown in SQL Developer. Why the different set of stats for each? Thanks.

Cross-referencing to another recent thread on this topic:
Re: set autotrace on statistics in sqldeveloper (oracle 11g) is wrong

Calling from the application Slow vs. Running through SQL developer Fast

Alright, we write many applications that make use of calling stored procedures in packages to return data. This is the only time i have ever encountered this issue and have not been able to pinpoint the cause.
This application is very data-centric and is filled with calls to stored procedures and I would say about 80% run fine as in the time required to run is about the same as in SQL Developer maybe just a little slower due to the amount of data that may be returned to the application. The other 20% run horribly slow from the application and run lighting fast in SQL Developer and i cannot figure out why.
I have traced the code right up to the .Fill on the Oracle.DataAccess.Client.OracleDataAdapter and that is where it just holds either for a long period of time or just forever, some of these i haved waited hours for and they have not finished running.
For Example: I created a new page in the project and it makes a request through the use of ajax, when the request file is reached it performs two stored procedures from the same package (the only two procedures in the package). Both procedures take in three varchar2's and have an in out cursor, the cursor is returned into a datatable in the VB. The first query runs in a couple seconds returns the correct data etc. The second query, which takes .2 seconds on average to run from SQL Developer, just runs and runs and i have never actually even waited for it to finish because it takes so long. The specific example i am trying only returns 1 row with 7 columns, so there is not a large amount of data being passed back.
I have seen this sort of thing happen on occasions, but everytime it was usually because the package was not compiled and was waiting on a view to finish before compilation and after killing the view it was fine. But this issue seems to happen randomnly with certain procedures and not others all in the same package.
This issue happens on the same procedures everytime which would lead me to believe it is the procedure, but running them in SQL Developer shows me this is incorrect because they run exceptionally fast in some cases. I even went so far as to restart the entire database just in case there was some sort of lock causing this issue but this did not fix the issue.
I have verified parameters, cursors, debugged the procedures, stepped every line of code, tried deleting and readding the oracle.dataAccess reference. I can't seem to figure this one out.
It is causing alot of wasted time because i am forced to wait a horribly long time for these queries in order to test. If anyone has any clues, hints, or ideas as to what this could be please let me know! If the same issue exists when the application is moved into production it will be unnacceptable and the application utterly unusable.
Thanks in Advance for any help!
-Jarrod

Hi,
This is consistently reproducible with the problem procedure/operations? Total WAG here, but I've seen cases where having support for distributed transactions enabled causes the database to disable certain optimizations. Try setting Enlist=false in your connection string.
Otherwise, I'd recommend enabling 10046 database trace and client side sqlnet trace to capture the problem behavior for further investigation. Oracle support can certainly give you a hand with that if needed.
Hope it helps,
Greg

Optimizing an SQL Query using Oracle SQL Developer

Hi ,
Currently i am using Oracle SQL Developer as my Database IDE .
Is it possible to use Orqcles SQLDeveloper for the purpose of Optimizing an SQL Query ??
For example assume i am having a query as :
Select from Tranac_Master where CUST_STATAUS='Y' and JCC_REPORT='N'*
Could anybody please tell me how can i use Oracle SQL Developer to optimize this query or any other SQL queries ??
Please share your ideas , thanks in advance .

1. Your query looks very simplistic as it is, so I fail to see how you can better optimise it (unless 'Tranac_Master' is a view, in which case I'd need to see the view details).
2. No tool can automagically optimise your SQL to any degree of practical use. Very minor adjustments may be possible automatically, but really it is a question of you knowing your data & database design accurately, and then you applying your expert knowledge to tune it.

Plsql_optimize_level = 3 and native compilation in SQL Developer?

SQL Developer: Version 3.1.06 (Build MAIN-06.82)
Oracle: 11gR2
OS: Ubuntu 10.10
Whenever I compile a PL/SQL unit in SQL Developer (using 'Compile' button) it is compiled with the following settings:
PLSQL_OPTIMIZE_LEVEL = 2
PLSQL_CODE_TYPE = 'INTERPRETED'
However, if I issue the following commands in an SQL Worksheet:
ALTER SESSION SET plsql_optimize_level = 3;
ALTER PACKAGE PACKAGE_NAME COMPILE PLSQL_CODE_TYPE = NATIVE;
the query SELECT PLSQL_OPTIMIZE_LEVEL, PLSQL_CODE_TYPE FROM ALL_PLSQL_OBJECT_SETTINGS WHERE NAME = 'PACKAGE_NAME'; resullts in
PLSQL_OPTIMIZE_LEVEL     PLSQL_CODE_TYPE
3     NATIVE
3     NATIVE
Is it possible to make SQL Developer to use these settings by default?
P.S. It seems that Tools > Preferences > Database > PL/SQL Compiler menu section is missing the options I need (Optimization level drop-down menu have numbers 0-2, but not 3). Are there any plans to support these features in the future releases?
Edited by: Ravshan Abbasov on Feb 6, 2012 6:28 AM

Hi Ravshan,
I thought a workaround would be to create a sql script like the following:
alter session set plsql_code_type=native;
alter session set plsql_optimize_level=3; then point to it in the setting for Tools|Preferences|Database|Filename for connection startup script. That doesn't work however, as the other preference setting for plsql_optimize_level overrides the session value of 3 during compilation from the UI.
According to Oracle documentation, level 3 was added for Oracle 11g. Prior to that, the same effect could be achieved by level 2 in conjunction with the INLINE pragma in the PL/SQL code.
You might want to make a feature request for this on the SQL Developer Exchange so the community can vote and comment.
Regards,
Gary
SQL Developer Team
Edited by: Gary Graham on Feb 6, 2012 2:32 PM
And, of course, Compile for Debug does not work with the 'native' setting.

SQL developer some minor anoying problems.

Hello,
can someone please explain to me why i have this problems in SQL developer.
First problem is with search db objects.
When i type in search string and i tick all objects all shemas it starts search ... finds nothing
because search changes "search in all schemas" to "search only under connected user".
Then i have to manually select all schemas and run search again and then it searches under all schemas.
http://s29.postimg.org/p2vdaqxs7/shema_search.jpg
Second problem is (i dont know if this is intended or not) that if i mix upercase letters in search string
with lower case it wont find anything.
http://s21.postimg.org/ke3k8icpz/found_nothing.jpg
Third problem is when search finds something and i click on a table for example from found resoults
it always opens up 2 tables (with same name) and again i have to manually close one of them.
http://s12.postimg.org/s7fwmd1hp/two_tables.jpg
4th problem is speed is there a way to really optimize SQL developer for speed. By that i mean
that finding db objects forks really fast ... switching between tables and stuff like that?
Is there a guide of settings that explains stuff like that?
At each problem i have posted a screen shot for better understanding.
I hope someone will try to help me solve those anoying problems.
Thank you!
PS my sql developer version is 4.1.0.17 problems like these started in 3.x version already.

The first thing to try, if you haven't already, is to update your video driver.

Performance problem with slow VIEW from JDBC (fast from SQL Developer)

Hi all,
I'm experiencing following problem and would like to know if someone else also hit this one before and has a suggestion how to solve it:
I have a pretty complicated SELECT statement that per definition returns only a few rows (~30). With no further optimization it takes ~20 seconds to return the full dataset in Oracle SQL Developer. If you add the */+ PUSH_PRED(name_of_some_inner_view) /* hint (hint is correct, stars got eaten by the OTN-forum syntax), the statement takes less than 0.5s to execute (still in SQL Developer). I saved the statement with the hint as VIEW. Selecting from the VIEW in SQL Developer is also fast.
Now if I call the statement from JDBC (Tomcat webapp), I can see from the server console that the statement is 1:1 100% the same as the one I execute in SQL Developer. Nevertheless it takes about 20 seconds to complete.
Here my details:
SELECT banner FROM v$version;
BANNER
Oracle Database 11g Express Edition Release 11.2.0.2.0 - Production
PL/SQL Release 11.2.0.2.0 - Production
CORE     11.2.0.2.0     Production
TNS for 32-bit Windows: Version 11.2.0.2.0 - Production
NLSRTL Version 11.2.0.2.0 - Production
JDBC Driver used: some old odbc14.jar as well as current odbc6.jar for 11.2.0.2.0 from http://www.oracle.com/technetwork/da...10-090769.html
SQL Developer: current version 3.2.20.09From my reading this could go wrong:
- JDBC doesn't know the VIEW's column data types and Oracle behaves mysterious because of this (=there must be more to the SELECT than just the string, some meta-information)
- For some reason the hint inside the VIEW is not used (unlikely)
I also tried a Table Function/Pipelined table and selected from it as a workaround, but the result is the same: Selecting from Function is fast from SQL Developer, but slow from JDBC. All other statements that come from JDBC are as fast as they should be. I really don't know what to think of this and where the error might be.
Is there some setting that tells Oracle not to use hints when called from JDBC?
Thank you & Best regards,
Blama

Hi Bawer,
that's what I'm thinking. Unfortunately I can't post it, as it is library code (not my lib). But in the debug-output I can see the SQL-String sent to the DB (which does include the hint).
But I find the 2nd option you mention more likely anyway: Even if I put the hint into a VIEW and select from the view, the time-difference is there (it's even there if I use Table Functions/Pipelined table and select from the function).
So I'd think it is more likely that something else is happening (e.g. Oracle is configured in a way that it does not use hints when called from JDBC or similar. Or the library sets some session options in order to prevent the usage of hints). But I don't know if there is even the possibility of doing so.
Does the Oracle JDBC driver have the option to set these options?
Does the Oracle DB have the option to set sth. like "ALTER SESSION SET dontUseHints = 'Y';"

SQL Developer 1.1 Patch 3 still does not work on 64-bit Windows

There has been a long-standing problem with SQL Developer 1.1 not working on 64-bit versions of Windows. When sqldeveloper.exe is executed, a very unhelpful error dialog stating "The application failed to initialize properly (0xc00000018). Click on OK to terminate the application" is displayed.
While there is a workaround that involves running the sqldeveloper.bat file in the \sqldeveloper\bin subdirectory, it is a bit inconvenient and requires the user to discover this workaround. Furthermore, SQL Developer 1.0 did not have this problem, so it is a bit puzzling as to why the problem was introduced with SQL Developer 1.1 and why it is still not fixed with the latest patch.

I can confirm that we have a fix for this problem. I'm not sure when this fix will be available in SQL Developer.
The bug was introduced in 1.1 due to optimizations in the way that the native Windows launcher works to better support products like SQL Developer.
Thanks,
Brian

Garbage collection SQL Developer

When data grids are closed in SQL Developer, how long until the garbage collector frees that associated memory and releases it back into the pool? Are there preference(s) or configuration setting(s) that we can change to reduce the time from closing a data grid until that associated memory is released?
What I am trying to accomplish is staying within the memory constraints as dictated by the real memory constraints of the machine without having to quit and then restart SQL Developer.
Thanks in advance,
ScottK

Hi Scott,
You might want to review some of the information here:
Reduce SQLDeveloper memory footprint with JDK 1.7
In summary, the improved garbage collection algorithm can be enabled in the later jdk1.6.0 updates. I believe G1GC first becomes the default algorithm in jdk1.7.0_04, along with other JVM optimizations merged in from JRockit. Just note that Java 7 is not certified with SQL Developer at this time (search the forum for details), but it does seem to reduce memory consumption and offer smoother performance.
Regards,
Gary
SQL Developer Team

Additional licenses reuired for using Sql Tuning Advisor In SQL Developer 4.0.3

Hi,
We have Oracle Database 11g Enterprise Edition Release 11.2.0.3.0. Do we need to purchase an additional oracle license for using SQL Tuning Advisor Option in SQL Developer 4.0.3

We have Oracle Database 11g Enterprise Edition Release 11.2.0.3.0. Do we need to purchase an additional oracle license for using SQL Tuning Advisor Option in SQL Developer 4.0.3
The Oracle Tuning Pack is DATABASE functionality - it is part of the database. Sql Developer just uses it.
Yes - to use ANY of the features of the tuning pack requires an extra cost license.
http://docs.oracle.com/cd/B28359_01/license.111/b28287/options.htm#CIHFIHFG
Oracle Tuning Pack
The Oracle Tuning Pack provides database administrators with expert performance management for the Oracle environment, including SQL tuning and storage optimizations. The Oracle Diagnostic Pack is a prerequisite product to the Oracle Tuning Pack. Therefore, to use the Tuning Pack, you must also have a Diagnostic Pack.
The Tuning Pack includes the following features:
SQL Access Advisor
SQL Tuning Advisor
Automatic SQL Tuning
SQL Tuning Sets
SQL Monitoring
Reorganize objects
In order to use the features listed above, you must purchase licenses for the Tuning Pack, with one exception: SQL Tuning Sets can be used if you have licensed either the Tuning Pack or Oracle Real Application Testing. A new initialization parameter, CONTROL_MANAGEMENT_PACK_ACCESS, is introduced to control access to the Diagnostic Pack and Tuning Pack in the database server. This parameter can be set to one of three values:
DIAGNOSTIC+TUNING: Diagnostic Pack and Tuning Pack functionally is enabled in the database server.
DIAGNOSTIC: Only Diagnostic Pack functionality is enabled in the server.
NONE: Diagnostic Pack and Tuning pack functionally is disabled in the database server.
The Tuning Pack functionality can be accessed by the Enterprise Manager links as well as through the database server command-line APIs. The use of either interface requires licensing of the Tuning Pack

How to print a something in oracle sql developer

Hello all
Do you know How to print a something in oracle sql developer? i mean for example in the query we write something, (offcourse i dont mean comments)
thank u in advance.
best

1003209 wrote:
Hello all
Do you know How to print a something in oracle sql developer? i mean for example in the query we write something, (offcourse i dont mean comments)
thank u in advance.
bestDBMS_OUTPUT()

Oracle SQL Developer 1.0 is easy to install and use, and is portable

I have tried the latest version of Oracle SQL Developer 1.0 and would like to share my experience of using it.
Installation of Oracle SQL Developer 1.0
Download from
http://www.oracle.com/technology/software/products/sql/index.html?_template
Unzip the Oracle SQL Developer for Windows (55.8 MB) to C:\sqldeveloper (103MB)
Advantages: The unzip folder can be your removable disk and you can access Oracle
anywhere provided that there is an Internet connection to Oracle Server.
Unzip sqldeveloper-1557.zip to C:\ with folder name;
double-click on sqldeveloper.exe in c:\sqldeveloper
Click on [No]
Tick all check boxes
Click on [OK]
Right-click on Connections, New
Database Connection…
Enter User name: SCOTT
Password: TIGER
Hostname: 127.0.0.1 (or IP of your Oracle Server on the Internet)
SID: orcl
If you want to connect to local Oracle user SYS,
Enter User name: sys
Password: ora10g_manager_password
Hostname: 127.0.0.1
SID: orcl
Select Role: SYSDBA
Click on [Connect]
Right-click on Tables, Create Table
Click on [Add Column]
Select Type: NUMBER for COLUMN2
Click on [OK]
Table1 is created
Click on TABLE1, click on “Data” tab
Click on the “Green Plus” icon to insert record
Click on “Commit Changes” icon
Click on “DBConnection1” tab
Enter: select * from table1;
Click on “Execute Statement (F9)” icon
To exit: Click on File, Exit

Have you noticed that there's a forum dedicated to SQL Developer?
C.

Engineer to Logical Model in SQL Developer EA4 causes problems

I'm working with SQL Developer 3.0 EA4 (Build MAIN-03.97)
Unfortunately I fond out, that it would be impossible to use the function " Engineer to Logical Model" any more after I change the relational model. In datamodeler.log I got the error message line "[AWT-EventQueue-0] ERROR MDBAction - java.lang.NullPointerException" for each time I use the function "Engineer to Logical Model". I try it out with the sample model "sh_cre_all.sql" and with following steps:
1) Import via DDL File – no problem
2) Engineer to Logical Model – no problem
3) Change some attributes in the relational model – no problem
4) Again Engineer to Logical Model – no problem
5) Save, Exit an Open the sample – no problem
6) Again Step 3 and 4 – no problem
7) Add a table via drag&drop from an oracle schema – no problem
8) Save, Exit an Open the sample – no problem
9) Engineer to Logical Model no longer possible!!!
Bernd

I have experienced similar problems with 'Engineer to Logical model'.
The scenario was following:
Creating Logical model using 'Engineer to Logical model' from existing Relational model.
Modifying the Relational model and 'Engineer to Logical model' again. No exception occured but the Logical model wasn't updated accordingly.
Removing all entities from the Logical model.
Trying to 'Engineer to Logical model' again. No entities were created in the Logical model (even after few tries).
So I got to situation where I was unable to generate a Logical model, which was quite frustrating.
The workaround was to create new Data Modeller project and import to it from the original project - the 'Engineer to Logical model' worked again.

SQL Developer Optimization

Similar Messages

Maybe you are looking for