How can I use equalsIgnoreCase in JDBC Application to return database value
How can I ensure that the code will return a name from the database by using equalsIgnoreCase().
Please see below code .
public class RetrievEmp {
final static String FILE_NAME "c:\\project\\test.txt";
/** Retrieves data from Employee table with the specified column
* and employee's name.
public String getDataFromEmpTable(String empname, String column) throws Exception {
java.sql.Connection con = null;
String query = "select " + column + " from owner.Employee where NAME = ?";
ConnectionPool conPool = ConnectionPool.getPool();
ResultSet rs = null;
con = conPool.getConnection();
PreparedStatement ps = con.prepareStatement(query);
try {
ps.setString(1, name);
rs = ps.executeQuery();
if(rs.next()) {
rs.getString(1).equalsIgnoreCase(column);
return rs.getString(1);
else {
return null;
finally {
try {
if(rs != null) {
rs.close();
if(con != null) {
con.close();
if(ps != null) {
ps.close();
}catch(Exception e){
log.debug("Exception while closing connection");
Thank you for your posting - The Member Feedback forum is not monitored by Oracle support or product teams and so Oracle product and technology related questions cannot be answered. However we recommend that you post this thread to the "Database - General" forum.
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SOLVED: How can I use or call a function that returns %ROWTYPE?
Hi
edit: you can probably skip all this guff and go straight to the bottom...In the end this is probably just a question of how to use a function that returns a %rowtype. Thanks.
Currently reading Feuerstein's tome, 5th ed. I've downloaded and run the file genaa.sp, which is a code generator. Specifically, you feed it a table name and it generates code (package header and package body) that will create a cache of the specified table's contents.
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HR@XE> @"C:\Documents and Settings\Jason\My Documents\Work\SQL\OPP5.WEB.CODE\OPP5.WEB.CODE\genaa.sp"
749 /
Procedure created.
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function onerow ( EMPLOYEE_ID_in IN HR.EMPLOYEES.EMPLOYEE_ID%TYPE) return HR.EMPLOYEES%ROWTYPE;
function onerow_by_EMP_EMAIL_UK (EMAIL_in IN HR.EMPLOYEES.EMAIL%TYPE) return HR.EMPLOYEES%ROWTYPE;
procedure test;
end EMPLOYEES_cache;
create or replace package body EMPLOYEES_cache is
TYPE EMPLOYEES_aat IS TABLE OF HR.EMPLOYEES%ROWTYPE INDEX BY PLS_INTEGER;
EMP_EMP_ID_PK_aa EMPLOYEES_aat;
TYPE EMP_EMAIL_UK_aat IS TABLE OF HR.EMPLOYEES.EMPLOYEE_ID%TYPE INDEX BY HR.EMPLOYEES.EMAIL%TYPE;
EMP_EMAIL_UK_aa EMP_EMAIL_UK_aat;
function onerow ( EMPLOYEE_ID_in IN HR.EMPLOYEES.EMPLOYEE_ID%TYPE)
return HR.EMPLOYEES%ROWTYPE is
begin
return EMP_EMP_ID_PK_aa (EMPLOYEE_ID_in);
end;
function onerow_by_EMP_EMAIL_UK (EMAIL_in IN HR.EMPLOYEES.EMAIL%TYPE)
return HR.EMPLOYEES%ROWTYPE is
begin
return EMP_EMP_ID_PK_aa (EMP_EMAIL_UK_aa (EMAIL_in));
end;
procedure load_arrays is
begin
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LOOP
EMP_EMP_ID_PK_aa(rec.EMPLOYEE_ID) := rec;
EMP_EMAIL_UK_aa(rec.EMAIL) := rec.EMPLOYEE_ID;
end loop;
END load_arrays;
procedure test is
pky_rec HR.EMPLOYEES%ROWTYPE;
EMP_EMAIL_UK_aa_rec HR.EMPLOYEES%ROWTYPE;
begin
for rec in (select * from HR.EMPLOYEES) loop
pky_rec := onerow (rec.EMPLOYEE_ID);
EMP_EMAIL_UK_aa_rec := onerow_by_EMP_EMAIL_UK (rec.EMAIL);
if rec.EMPLOYEE_ID = EMP_EMAIL_UK_aa_rec.EMPLOYEE_ID then
dbms_output.put_line ('EMP_EMAIL_UK lookup OK');
else
dbms_output.put_line ('EMP_EMAIL_UK lookup NOT OK');
end if;
end loop;
end test;
BEGIN
load_arrays;
end EMPLOYEES_cache;
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HR@XE> @"C:\Documents and Settings\Jason\My Documents\Work\SQL\EMPLOYEES_CACHE.sql"
Package created.
Package body created.I am now trying to use the functionality within the package.
I have figured out that the section
BEGIN
load_arrays;
end EMPLOYEES_cache;
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With that in mind, I'm trying to call the onerow() function, but it's not working:
HR@XE> select onerow(100) from dual;
select onerow(100) from dual
ERROR at line 1:
ORA-00904: "ONEROW": invalid identifier
HR@XE> select employees_cache.onerow(100) from dual;
select employees_cache.onerow(100) from dual
ERROR at line 1:
ORA-06553: PLS-801: internal error [55018]
HR@XE> select table(employees_cache.onerow(100)) from dual;
select table(employees_cache.onerow(100)) from dual
ERROR at line 1:
ORA-00936: missing expressionHe provides the code genaa.sp, and a very brief description of what it does, but doesn't tell us how to run the generated code!
Now, I have just done some googling, and it seems that what I am trying to do isn't possible. Apparently %ROWTYPE is PL/SQL, and not understood by SQL, so you can't call onerow() from sql. Correct?
So I try wrapping the call in an exec:
HR@XE> exec select employees_cache.onerow(100) from dual;
BEGIN select employees_cache.onerow(100) from dual; END;
ERROR at line 1:
ORA-06550: line 1, column 30:
PLS-00382: expression is of wrong type
ORA-06550: line 1, column 7:
PLS-00428: an INTO clause is expected in this SELECT statement
HR@XE> exec select table(employees_cache.onerow(100)) from dual;
BEGIN select table(employees_cache.onerow(100)) from dual; END;
ERROR at line 1:
ORA-06550: line 1, column 14:
PL/SQL: ORA-00936: missing expression
ORA-06550: line 1, column 7:
PL/SQL: SQL Statement ignored
HR@XE> exec employees_cache.onerow(100)
BEGIN employees_cache.onerow(100); END;
ERROR at line 1:
ORA-06550: line 1, column 7:
PLS-00221: 'ONEROW' is not a procedure or is undefined
ORA-06550: line 1, column 7:
PL/SQL: Statement ignoredNo joy.
Of course, now that I'm looking at it again, it seems that the way to go is indicated by the first error:
PLS-00428: an INTO clause is expected in this SELECT statement
So am I supposed to create a type of EMPLOYEES%ROWTYPE in a PL/SQL procedure, and the idea of this code, is that the first call to onerow() runs the initialiation code, which populates the cache, and all subsequent calls to onerow() (whether by my session or any other) will use the cache?
I've had a stab at this, but still, no joy:
create or replace procedure testcache is
emp employees%rowtype;
begin
select employees_cache.onerow(100) from dual into emp;
dbms_output.put_line('Emp id: ' || emp.employee_id);
end testcache;
show errors
HR@XE> @testcache.sql
Warning: Procedure created with compilation errors.
Errors for PROCEDURE TESTCACHE:
LINE/COL ERROR
4/9 PL/SQL: SQL Statement ignored
4/54 PL/SQL: ORA-00933: SQL command not properly ended
HR@XE>Have a feeling this should be really easy. Can anybody help?
Many thanks in advance.
Jason
Edited by: 942375 on 08-Feb-2013 11:45>
Ha, figured it out
>
Hopefully you also figured out that the example is just that: a technical example of how to use certain Oracle functionality. Unfortunately it is also an example of what you should NOT do in an actual application.
That code isn't scaleable, uses expensive PGA memory, has no limit on the amount of memory that might be used and, contrary to your belief will result in EVERY SESSION HAVING ITS OWN CACHE of exactly the same data if the session even touches that package.
Mr. Feuerstein is an expert in SQL and PL/SQL and his books cover virtually all of the functionality available. He also does an excellent job of providing examples to illustrate how that functionality can be combined and used. But the bulk of those examples are intended solely to illustrate the 'technical' aspects of the technology. They do not necessarily reflect best practices and they often do not address performance or other issues that need to be considered when actually using those techniques in a particular application. The examples show WHAT can be done but not necessarily WHEN or even IF a given technique should be used.
It is up to the reader to learn the advantages and disadvantages of each technicalogical piece and determine when and how to use them.
>
Now, I have just done some googling, and it seems that what I am trying to do isn't possible. Apparently %ROWTYPE is PL/SQL, and not understood by SQL, so you can't call onerow() from sql. Correct?
>
That is correct. To be used by SQL you would need to create SQL types using the CREATE TYPE syntax. Currently that syntax does not support anything similar to %ROWTYPE.
>
So am I supposed to create a type of EMPLOYEES%ROWTYPE in a PL/SQL procedure, and the idea of this code, is that the first call to onerow() runs the initialiation code, which populates the cache, and all subsequent calls to onerow() (whether by my session or any other) will use the cache?
>
NO! That is a common misconception. Each session has its own set of package variables. Any session that touches that package will cause the entire EMPLOYEES table to be queried and stored in a new associative array specifically for that session.
That duplicates the cache for each session using the package. So while there might be some marginal benefit for a single session to cache data like that the benefit usually disappears if multiple sessions are involved.
The main use case that I am aware of where such caching has benefit is during ETL processing of staged data when the processing of each record is too complex to be done in SQL and the records need to be BULK loaded and the data manipulated in a loop. Then using an associative array as a lookup table to quickly get a small amount of data can be effective. And if the ETL procedure is being processed in parallel (meaning different sessions) then for a small lookup array the additional memory use is tolerable.
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2. Newer versions of Oracle now have more than one cache
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4. The cursor and the buffer caches ARE SHARED by multiple sessions globally.
So the short story is that there would rarely be a use case where ARRAYs like that would be preferred over accessing the data from the table. -
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Mon Sep 25 11:40:12 BST 2000:<I> <WebAppServletContext-gmi> Generated java file: /opt/wls-servers/gmiServer/weblogic/war/gmi/_tmp_war/jsp_servlet/gmiService.java
Mon Sep 25 11:40:14 BST 2000:<E> <WebAppServletContext-gmi> Compilation of /opt/wls-servers/gmiServer/weblogic/war/gmi/_tmp_war/jsp_servlet/gmiService.java failed: Exception in thread "main" java.lang.NoClassDefFoundError: sun/tools/javac/Main
java.io.IOException: Compiler failed executable.exec([Ljava.lang.String;[javac, -classpath, /opt/Solaris_JRE_1.2.1_04/lib/rt.jar:/opt/Solaris_JRE_1.2.1_04/lib/i18n.jar:/opt/Solaris_JRE_1.2.1_04/classes:/var/wls/5.1/weblogic/lib/weblogic510sp4boot.jar:/var/wls/5.1/weblogic/classes/boot:/var/wls/5.1/weblogic/eval/cloudscape/lib/cloudscape.jar:/var/wls/5.1/weblogic/lib/wleorb.jar:/var/wls/5.1/weblogic/lib/wlepool.jar:/var/wls/5.1/weblogic/lib/weblogic510sp4.jar:/var/wls/5.1/weblogic/license:/var/wls/5.1/weblogic/classes:/var/wls/5.1/weblogic/lib/weblogicaux.jar:/opt/wls-servers/gmiServer/weblogic/gmiServer/serverclasses:/opt/wls-servers/gmiServer/weblogic/lotusxsl.jar:/opt/wls-servers/gmiServer/weblogic/xerces.jar:/opt/wls-servers/gmiServer/weblogic/logging.jar::/opt/wls-servers/gmiServer/weblogic/war/gmi/WEB-INF/classes:/opt/wls-servers/gmiServer/weblogic/war/gmi/_tmp_war, -d, /opt/wls-servers/gmiServer/weblogic/war/gmi/_tmp_war, /opt/wls-servers/gmiServer/weblogic/war/gmi/_tmp_war/jsp_servlet/gmiService.java])
at java.lang.Throwable.fillInStackTrace(Native Method)
at java.lang.Throwable.fillInStackTrace(Compiled Code)
at java.lang.Throwable.<init>(Compiled Code)
at java.lang.Exception.<init>(Compiled Code)
at java.io.IOException.<init>(Compiled Code)
at weblogic.utils.compiler.CompilerInvoker.compileMaybeExit(Compiled Code)
at weblogic.utils.compiler.CompilerInvoker.compile(CompilerInvoker.java:200)
at weblogic.servlet.jsp.JspStub.compilePage(Compiled Code)
at weblogic.servlet.jsp.JspStub.prepareServlet(JspStub.java:173)
at weblogic.servlet.internal.ServletStubImpl.getServlet(ServletStubImpl.java:187)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:118)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:142)
at weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImpl.java:744)
at weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImpl.java:692)
at weblogic.servlet.internal.ServletContextManager.invokeServlet(ServletContextManager.java:251)
at weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.java:363)
at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:263)
at weblogic.kernel.ExecuteThread.run(Compiled Code)
The default Java compiler from sun lives in the tools.jar that comes with
the JDK. Just add that to your set of JARs which are deployed in production
and you should be fine. No need to install the full JDK - just make the
tools.jar available to WebLogic.
Regards
James
James Strachan
=============
email: [email protected]
web: http://www.metastuff.com
"Martin Webb" <[email protected]> wrote in message
news:[email protected]...
>
> How can WLS use JSP pages in a Web Application (either a .war file or a
war directory structure) without a java compiler?
>
> I suspect either the JSP specification is flawed (i.e. it doesn't take
account of servers using just a JRE), or BEA's implementation is broken.
>
> Production servers do not have a JDK installed. They only have a JRE.
Therfore a java compiler is not present on the machine that the Web
Application is deployed onto.
>
> On the development machine, when the server is requested to load the JSP
it creates a tmpwar directory within the Web Application directory
structure. This is then included in the resultant .war file thus:
>
> D:\war>jar -tf gmi.war
> META-INF/
> META-INF/MANIFEST.MF
> gmiService.jsp
> WEB-INF/
> WEB-INF/classes/
> WEB-INF/classes/com/
> WEB-INF/classes/com/bt/
> WEB-INF/classes/com/bt/gmi/
> WEB-INF/classes/com/bt/gmi/gmiService.class
> WEB-INF/getList.xsl
> WEB-INF/getListByConnection.xsl
> WEB-INF/getListByDistrict.xsl
> WEB-INF/getListByDistrictConnection.xsl
> WEB-INF/lib/
> WEB-INF/source/
> WEB-INF/source/build.bat
> WEB-INF/source/gmiService.java
> WEB-INF/web.xml
> WEB-INF/weblogic.xml
> tmpwar/
> tmpwar/jsp_servlet/
> tmpwar/jsp_servlet/_gmiservice.class
> tmpwar/jsp_servlet/_gmiservice.java
>
> When deployed on the production server with the web.xml file set to use
the following values (note XML stripped):
>
> weblogic.jsp.pageCheckSeconds
> -1
>
> weblogic.jsp.precompile
> false
>
> weblogic.jsp.compileCommand
> javac
>
> weblogic.jsp.verbose
> true
>
> weblogic.jsp.packagePrefix
> jsp_servlet
>
> weblogic.jsp.keepgenerated
> false
>
>
> And in the weblogic.properties file:
>
> weblogic.httpd.webApp.gmi=war/gmi
>
> I've also tried with the .war file, but that insists on creating another
tmpwar directory outside of the .war file.
>
>
> Then, although I have set pageCheckSeconds to -1 (don't check and don't
recompile) ter production server still attempts to recompile the JSP's:
>
>
> Mon Sep 25 11:40:11 BST 2000:<I> <WebAppServletContext-gmi> *.jsp: init
> Mon Sep 25 11:40:11 BST 2000:<I> <WebAppServletContext-gmi> *.jsp: param
verbose initialized to: true
> Mon Sep 25 11:40:11 BST 2000:<I> <WebAppServletContext-gmi> *.jsp: param
packagePrefix initialized to: jsp_servlet
> Mon Sep 25 11:40:11 BST 2000:<I> <WebAppServletContext-gmi> *.jsp: param
compileCommand initialized to: javac
> Mon Sep 25 11:40:11 BST 2000:<I> <WebAppServletContext-gmi> *.jsp: param
srcCompiler initialized to weblogic.jspc
> Mon Sep 25 11:40:11 BST 2000:<I> <WebAppServletContext-gmi> *.jsp: param
superclass initialized to null
> Mon Sep 25 11:40:11 BST 2000:<I> <WebAppServletContext-gmi> *.jsp: param
workingDir initialized to:
/opt/wls-servers/gmiServer/weblogic/war/gmi/_tmp_war
> Mon Sep 25 11:40:11 BST 2000:<I> <WebAppServletContext-gmi> *.jsp: param
pageCheckSeconds initialized to: -1
> Mon Sep 25 11:40:11 BST 2000:<I> <WebAppServletContext-gmi> *.jsp:
initialization complete
> Mon Sep 25 11:40:12 BST 2000:<I> <WebAppServletContext-gmi> Generated java
file:
/opt/wls-servers/gmiServer/weblogic/war/gmi/_tmp_war/jsp_servlet/gmiService.
java
> Mon Sep 25 11:40:14 BST 2000:<E> <WebAppServletContext-gmi> Compilation of
/opt/wls-servers/gmiServer/weblogic/war/gmi/_tmp_war/jsp_servlet/gmiService.
java failed: Exception in thread "main" java.lang.NoClassDefFoundError:
sun/tools/javac/Main
>
> java.io.IOException: Compiler failed
executable.exec([Ljava.lang.String;[javac, -classpath,
/opt/Solaris_JRE_1.2.1_04/lib/rt.jar:/opt/Solaris_JRE_1.2.1_04/lib/i18n.jar:
/opt/Solaris_JRE_1.2.1_04/classes:/var/wls/5.1/weblogic/lib/weblogic510sp4bo
ot.jar:/var/wls/5.1/weblogic/classes/boot:/var/wls/5.1/weblogic/eval/cloudsc
ape/lib/cloudscape.jar:/var/wls/5.1/weblogic/lib/wleorb.jar:/var/wls/5.1/web
logic/lib/wlepool.jar:/var/wls/5.1/weblogic/lib/weblogic510sp4.jar:/var/wls/
5.1/weblogic/license:/var/wls/5.1/weblogic/classes:/var/wls/5.1/weblogic/lib
/weblogicaux.jar:/opt/wls-servers/gmiServer/weblogic/gmiServer/serverclasses
:/opt/wls-servers/gmiServer/weblogic/lotusxsl.jar:/opt/wls-servers/gmiServer
/weblogic/xerces.jar:/opt/wls-servers/gmiServer/weblogic/logging.jar::/opt/w
ls-servers/gmiServer/weblogic/war/gmi/WEB-INF/classes:/opt/wls-servers/gmiSe
rver/weblogic/war/gmi/_tmp_war, -d,
/opt/wls-servers/gmiServer/weblogic/war/gmi/_tmp_war,
/opt/wls-servers/gmiServer/weblogic/war/gmi/_tmp_war/jsp_servlet/gmiService.
java])
> at java.lang.Throwable.fillInStackTrace(Native Method)
> at java.lang.Throwable.fillInStackTrace(Compiled Code)
> at java.lang.Throwable.<init>(Compiled Code)
> at java.lang.Exception.<init>(Compiled Code)
> at java.io.IOException.<init>(Compiled Code)
> at
weblogic.utils.compiler.CompilerInvoker.compileMaybeExit(Compiled Code)
> at
weblogic.utils.compiler.CompilerInvoker.compile(CompilerInvoker.java:200)
> at weblogic.servlet.jsp.JspStub.compilePage(Compiled Code)
> at weblogic.servlet.jsp.JspStub.prepareServlet(JspStub.java:173)
> at
weblogic.servlet.internal.ServletStubImpl.getServlet(ServletStubImpl.java:18
7)
> at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:118)
> at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:142)
> at
weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImp
l.java:744)
> at
weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImp
l.java:692)
> at
weblogic.servlet.internal.ServletContextManager.invokeServlet(ServletContext
Manager.java:251)
> at
weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.java:363)
> at
weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:263)
> at weblogic.kernel.ExecuteThread.run(Compiled Code)
>
>
>
-
How can I use two OID realms in an application in Jdev 10.1.2
hello,
We have an application in jdeveloper 10.1.2. We are using OID with jazn
The users of the application are in two different realms. Right now, the application can se the users on the default realm of the OID to authenticate them, but cannot se the other realm (and the users of that realm).
How can we do, to let the application be able to authenticate the users of the two realms.
thanksHi,
The basics for using the two databases is simple.
For database configuration you have to provide the driver class name, url, schema name and password during the creation of the connection pools. So u can create a as many no. of connection pools as the no. of the databases.
Hope it will work..
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