Oracle 9i and JRE1.4.2.10 classes
after an unsuccessful attempt to use the DBMS_OBFUSCATION_TOOLKIT DE3Decrypt routine to decrypt encrypted data saved by Java program (using javax.crypto and sun.misc), I am trying to import those classes into ORACLE 9i and call the Java APIs from PL/SQL ; the classes being used are from JRE1.4.2.5 and are from the javax.crypto.* and sun.misc.* packages ; so I am trying to use the loadjava utility to import the classes into an ORACLE schema...and getting errors ORA-29521 (example -- referenced name java/lang/AssertionError could not be found) and also ORA-29545 (badly formed class) ; can I import classes from JRE1.4.2.5 into Oracle 9i? what version of JVM does Oracle 9i have? thank you so much for your help!
Hi sabraha:
AFAIK the JDK included into JVM is:
9i 1.3
10g 1.4
11g 1.5
But I am not complete sure because my experience with 9i was a long time ago.
So you need a javax.crypto package compiled and compatible with JDK 1.3, or better than this upgreade to 11g which Java support is really really fast :)
Best regards, Marcelo.
Similar Messages
-
Hello,
Can anyone tell if suns jre1.6.0_14 is certified for the oracle forms applications 10.1.2.3?
I found out that jre1.6.0_04 is certified but are the later release of jre1.6.0_xx also certified?
thx in advance.You may want to ask in the correct forum. http://forums.oracle.com/forums/forum.jspa?forumID=19
Correction - should be http://forums.oracle.com/forums/category.jspa?categoryID=19
In general with Java, if the last 2 digits (_nn) are higher than required, they are considered compatible. So the implication is 'yes' - but this is still the wrong place to ask.
<Ignore mode=on forum=this/>
Edited by: Hans Forbrich on Sep 10, 2009 7:23 AM -
Free online training site to learn Oracle Forms and reports
Hi All,
I want to learn Oracle Forms and Reports through free online classes. Can any one please let me know are thery any sites which are providing this type of training.
Thank you,
GanNot sure of specific on line free courses but otn.oracle.com/products/forms has plenty of how tos and white papers etc. hope this helps
-
Oracle Arrays and getVendorConnection API and Class Cast Exception
I 've gone through various threads relating to the topic of Oracle Arrays and the getVendorConnecton API call to avoid the class Cast Exception.. i ve used all these but am still facing the problem...
I would appreciate it if some one could resolve the following queries :
I am using Weblogic 8.1 SP5 with oracle 8i
1. I read that the need to use the getVendorConnection API to make pl/sql proc calls with oracle arrays from the WL Server wont be required to avoid classCastException...
I tried to use the connection from the WL connection pool ..but it didnot work....I used the getVendorConnection API ..which also doesnot seem to work..
I got the Heurisitc Hazard exception...I used the Oracle 9i driver ie ojdbc14.jar ...after this the exception is not coming but still the code doesnt seem to work...
the snippet of the code is pasted below :
~~~~~~~~~~~~~~~~~~~~~~~code is : ~~~~~~~~~~~~~~~~~~~
/*below :
logicalCon is the Connection from the WL connection pool
JDBCcon is the JDBC connection. */
<div> try </div>
<div>{ </div>
<div>
<b>vendorConn</b> = ((WLConnection)logicalCon).getVendorConnection();
</div>
<div>
//Calling the procedure
</div>
<div>
//java.util.Map childMap1 = JDBCcon.getTypeMap();
</div>
<div>
java.util.Map childMap1 = <b>vendorConn</b>.getTypeMap();
</div>
<div>
childMap1.put("SST_ROUTE_ENTRY", Class.forName("svm.stport.ejb.StaticRouteEntry"));
</div>
<div>
//JDBCcon.setTypeMap(childMap1);
<b>vendorConn</b>.setTypeMap(childMap1);
</div>
<div>
// Create an oracle.sql.ARRAY object to hold the values
</div>
<div>
/*oracle.sql.ArrayDescriptor arrayDesc1 = oracle.sql.ArrayDescriptor.createDescriptor("SST_ROUTE_ENTRY_ARR", JDBCcon); */
</div>
<div>
oracle.sql.ArrayDescriptor arrayDesc1 =
oracle.sql.ArrayDescriptor.createDescriptor("SST_ROUTE_ENTRY_ARR", <b>vendorConn</b>); // here if i use the JDBCcon it works perfectly.... <u>^%^%^%</u>
</div>
<div>
code to fill in the sst route entry array....
.....arrayValues1 */
</div>
<div>
/* oracle.sql.ARRAY array1 = new oracle.sql.ARRAY(arrayDesc1, JDBCcon, arrayValues1); */
</div>
<div>
oracle.sql.ARRAY array1 = new oracle.sql.ARRAY(arrayDesc1, <b>vendorConn</b>, arrayValues1);
</div>
<div>
callStatement = logicalCon.prepareCall( "? = call procName(?, ?, ?)");
</div>
<div>
/* ..code to set the ?s ie array1 */
</div>
<div>
callStatement.execute();
</div>
<div>
}catch(Exceptio e){
</div>
<div>
}</div>
<div>
finally </div>
</div>{</div>
<div>System.out.println(" I ve come to finally"); </div>
<div>}</div>
<div>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~code snippet ends here ~~~~~~~~~~~~~~``
</div>
I have observed that the control immediately comes to the finally block after the call to the createDescriptor line above with <u>^%^%^%</u> in the comment. If i use the JDBCCon in this line...it works perfectly fine.
Any pointers to where anything is getting wrong.
I have jst set the vendorCon to null in the end of the file and not closed it. Subsequently i have closed the logicalCon. This has been mentioned in some of the thread in this forum also.
Thanks,
-jwJatinder Wadhwa wrote:
I 've gone through various threads relating to the topic of Oracle Arrays and the getVendorConnecton API call to avoid the class Cast Exception.. i ve used all these but am still facing the problem...
I would appreciate it if some one could resolve the following queries :
I am using Weblogic 8.1 SP5 with oracle 8i
1. I read that the need to use the getVendorConnection API to make pl/sql proc calls with oracle arrays from the WL Server wont be required to avoid classCastException...
I tried to use the connection from the WL connection pool ..but it didnot work....I used the getVendorConnection API ..which also doesnot seem to work..
I got the Heurisitc Hazard exception...I used the Oracle 9i driver ie ojdbc14.jar ...after this the exception is not coming but still the code doesnt seem to work...
the snippet of the code is pasted below :
~~~~~~~~~~~~~~~~~~~~~~~code is : ~~~~~~~~~~~~~~~~~~~Hi. Show me the whole exception and stacktrace if you do:
try
vendorConn = ((WLConnection)logicalCon).getVendorConnection();
java.util.Map childMap1 = vendorConn.getTypeMap();
childMap1.put("SST_ROUTE_ENTRY" Class.forName("svm.stport.ejb.StaticRouteEntry"));
vendorConn.setTypeMap(childMap1);
oracle.sql.ArrayDescriptor arrayDesc1 =
oracle.sql.ArrayDescriptor.createDescriptor("SST_ROUTE_ENTRY_ARR",
vendorConn);
oracle.sql.ARRAY array1 = new oracle.sql.ARRAY(arrayDesc1, vendorConn, arrayValues1);
callStatement = logicalCon.prepareCall( "? = call procName(? ? ?)");
callStatement.execute();
}catch(Exception e){
e.printStackTrace();
finally
try{logicalCon.close();}catch(Exception ignore){}
System.out.println(" I ve come to finally");
/*below :
logicalCon is the Connection from the WL connection pool
JDBCcon is the JDBC connection. */
<div> try </div>
<div>{ </div>
<div>
<b>vendorConn</b> = ((WLConnection)logicalCon).getVendorConnection();
</div>
<div>
//Calling the procedure
</div>
<div>
//java.util.Map childMap1 = JDBCcon.getTypeMap();
</div>
<div>
java.util.Map childMap1 = <b>vendorConn</b>.getTypeMap();
</div>
<div>
childMap1.put("SST_ROUTE_ENTRY", Class.forName("svm.stport.ejb.StaticRouteEntry"));
</div>
<div>
//JDBCcon.setTypeMap(childMap1);
<b>vendorConn</b>.setTypeMap(childMap1);
</div>
<div>
// Create an oracle.sql.ARRAY object to hold the values
</div>
<div>
/*oracle.sql.ArrayDescriptor arrayDesc1 = oracle.sql.ArrayDescriptor.createDescriptor("SST_ROUTE_ENTRY_ARR", JDBCcon); */
</div>
<div>
oracle.sql.ArrayDescriptor arrayDesc1 =
oracle.sql.ArrayDescriptor.createDescriptor("SST_ROUTE_ENTRY_ARR", <b>vendorConn</b>); // here if i use the JDBCcon it works perfectly.... <u>^%^%^%</u>
</div>
<div>
code to fill in the sst route entry array....
.....arrayValues1 */
</div>
<div>
/* oracle.sql.ARRAY array1 = new oracle.sql.ARRAY(arrayDesc1, JDBCcon, arrayValues1); */
</div>
<div>
oracle.sql.ARRAY array1 = new oracle.sql.ARRAY(arrayDesc1, <b>vendorConn</b>, arrayValues1);
</div>
<div>
callStatement = logicalCon.prepareCall( "? = call procName(?, ?, ?)");
</div>
<div>
/* ..code to set the ?s ie array1 */
</div>
<div>
callStatement.execute();
</div>
<div>
}catch(Exceptio e){
</div>
<div>
}</div>
<div>
finally </div>
</div>{</div>
<div>System.out.println(" I ve come to finally"); </div>
<div>}</div>
<div>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~code snippet ends here ~~~~~~~~~~~~~~``
</div>
I have observed that the control immediately comes to the finally block after the call to the createDescriptor line above with <u>^%^%^%</u> in the comment. If i use the JDBCCon in this line...it works perfectly fine.
Any pointers to where anything is getting wrong.
I have jst set the vendorCon to null in the end of the file and not closed it. Subsequently i have closed the logicalCon. This has been mentioned in some of the thread in this forum also.
Thanks,
-jw -
Oracle, Null and empty Strings
Currently I'm facing problems with a class, which contains a String, which
is set to "" (empty String).
When the class is persistent, oracle writes null to the table column
(which seems to be common oracle behaviour) and when retrieving the class,
the field is set to null as well, giving me a lot of null-pointer
exceptions.
Anyway ... I can cope with that (just a lot of extra work)
far worse is the problem, wenn searching objects, that have this field set
to "" oder null.
Oracle can't find the records because JDO creates Querys "where
string=null" or "where string=''" , where oracle expects "where string is
null" to find the records.
Is there a workaround or solution ?Yeah, that would work as well, thx, but since I have to cope with
null-Strings now everywhere in my program, it doesn't hurt just to forbid
empty strings on the program side.
In future times I'll test on Oracle first, then porting to DB/2 - this way
I suppose work is far less to garant compability.
Nevertheless ... having to set the bankcode into quotes is a kodo bug in
my opinion.
Kodo knows the type of classfields (in this case string) and shouldn't
send the parameter as a BigDecimal to the database.
Given that, and having only bankcodes of null (only neccesary when using
Oracle), the method would look like:
public Collection getAccounts (String bankCode)
throws Exception
return getAccounts (Account.class, "bankcode=="+bankcode);
which is how a transparent persistent layer, um, should be , um , I mean
... just transparent ;-D
Marc Prud'hommeaux wrote:
Stefan-
Couldn't you just do something like:
public Collection getAccounts (String bankCode)
throws Exception
String filter;
if (bankCode == null || bankCode.length () == 0)
filter = "(bankCode == null || bankCode == "")";
else
filter = "bankCode == "" + bankCode + """;
return getAccounts (Account.class, filter);
If I understand the problem correctly, this should work for all the
databases.
In article <[email protected]>, Stefan wrote:
What operations are you performing to cause this SQL to be issued? You
say you are having trouble removing objects, but this is clearly not a
DELETE statement. Is this the SQL that is issued when looking up
objects by identity?I'm not removing objects, I was removing just quotes from parameters ;-)
A string column... is it also represented as a string field in your class?Yeah ... just to give you an impression of the code:
First we have a class, representing a bank account:
public class Account {
private AccountMgr myAccountMgr;
private String bankCode;
private String id;
Note, that in nearly all cases bankCode will be a number or null.
I have a second class "AccountMgr", which does all of the persistant stuff
(seaching, making persistent etc.)
This class has two methods, one versatile (protected) to retrieve accounts
by a given filterString and one who just returns accounts by bankCode,
building the expected filterstring. Here is my current working version:
public class AccountMgr {
public Collection getAccounts(String bankCode) throws Exception {
if (bankCode!=null) {
if (bankCode.equals("")) {
throw new Exception("check code, bankCode='' not allowed to get
same behavior from DB2 and Oracle");
// if set, quote the bankCode
bankCode="""+bankCode+""";
return getAccounts(Account.class,"bankCode=="+bankCode);
protected Collection getAccounts(Class accountClass, String filterAdd)
throws Exception {
PersistenceManager pm = MyHelper.getPersistenceManager();
String filter="";
if (filterAdd!=null && !filterAdd.trim().equals("")) {
filter+=filterAdd + " && ";
filter += "myAccountMgr==_accMgr";
Query query = pm.newQuery(accountClass, filter);
query.declareParameters("AccountMgr _accMgr");
return (Collection) query.execute(this);
As you can see, in the first method I have to set the bankCode into
quotes, when it's not null.
This is because otherwise a filter like "bankCode=1234" will be translated
in a way, where 1234 is send as a BigDecimal to the database:
[...] executing statement <4239745>: (SELECT [...] FROM JDO_ACCOUNT t0
WHERE t0.BANKCODE = ? : [reused=1;params={(BigDecimal) 1234}]
Marc Prud'hommeaux [email protected]
SolarMetric Inc. http://www.solarmetric.com -
Hi,
I have written an applet using Oracle Thin (classes111.zip and Oracle 7.3.4 and JDK 1.1.4).
I have my Oracle Server and my Web Server on the same machine.
Everything works fine with Netscape 4.7.
But with IE4 I have this message:
java.sql.SQLException: No suitable driver
java.lang.NullPointerException
Can anyone explain me what it means and what I have to do ?
Thanks a lot.
Ing. TOUSSET Olivier
nullCan you try registering the driver explicitly using DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver()). I think that there was some issue with Microsoft's VM that doing Class.forName() doesn't register the driver automatically. But I am not 100% sure.
-
I have written a win32 client application with Visual C++ for accessing an oracle 8.0.5 server on a linux platform.I have used an ODBC connection (MFC classes CDatabase e CRecordset). In application I have used a recordset on a view for updating the view's base table. On a view I have defined an instead of update trigger. All works fine. Now I must migrating it on an oracle 8.1.7 oracle server (or on win2k or linux). End now start the problem. On 8i server, after executing the query on the view, the function SQLGetStmtOption with SQL_CONCURRENCY param return SQL_CONCUR_READ_ONLY, making the recordset read only and i don't modify the view. What's the differences between Oracle 8 and Oracle 8i ODBC driver? Why with Oracle 8i I don't modify a view?
nullExecuted query is
SELECT * FROM VIEW_NAME WHERE ID = value
where ID is a primary key of the only key preserving table of the view. -
ODBC connectivity between Oracle 11G and MSSQL Server on Solaris 10
When we were running in 10G, I was able to successfully configure hsodbc using unixODBC and freeTDS to allow for an ODBC connection between Oracle and MSSQL Server.
A few weeks ago we upgraded to 11G and I've been struggling to get the connectivity (dg4odbc) working.
In our 10g environment unixODBC and freeTDS were compiled as 32-bit. I have recompiled them as 64-bit and switched over to an 11G listener and I am getting the following error:
ERROR at line 1:
ORA-28500: connection from ORACLE to a non-Oracle system returned this message:
here are my configuration files:
/usr/local/unixODBC/etc[PPRD]> more odbc.ini
[ODBC Data Sources]
identipass = MS SQL Server
[identipass]
Driver = /usr/local/freetds/lib/libtdsodbc.so
Setup = /usr/local/freetds/lib/libtdsodbc.so
Description = MS SQL Server
Trace = 1
TraceFile = /export/home/oracle/ODBC/odbc.trace
Server = stormwind
QuoteID = Yes
AnsiNPW = No
Database = identipass
Port = 1433
TDS_Version = 8.0
[Default]
Driver = /usr/local/freetds/lib/libtdsodbc.so
/usr/local/unixODBC/etc[PPRD]> more odbcinst.ini
[TDS]
Description=FreeTDS driver
Driver=/usr/local/freetds/lib/libtdsodbc.so
Setup=/usr/local/freetds/lib/libtdsodbc.so
Trace=Yes
TraceFile=/tmp/freetds.log
FileUsage=1
UsageCount=2
tnsnames.ora
identipass =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = tcp)(HOST = localhost)(PORT = 1522))
(CONNECT_DATA =
(SID = identipass)
(HS = OK)
listener.ora
LISTENERODBC =
(ADDRESS_LIST=
(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1522))
(ADDRESS=(PROTOCOL=ipc)(KEY=PNPKEY)))
SID_LIST_LISTENERODBC=
(SID_LIST=
(SID_DESC=
(SID_NAME=identipass)
(ORACLE_HOME=/u01/app/oracle/product/11.2.0/db_1)
(ENV="LD_LIBRARY_PATH=/u01/app/oracle/product/11.2.0/db_1/lib:/u01/app/oracle/product/11.2.0/db_1/hs/lib")
(PROGRAM=dg4odbc)
And finally, output from the trace file:
/u01/app/oracle/product/11.2.0/db_1/hs/log[PPRD]> more identipass_agt_1381.trc
Oracle Corporation --- THURSDAY NOV 18 2010 16:00:16.010
Heterogeneous Agent Release
11.2.0.1.0
Oracle Corporation --- THURSDAY NOV 18 2010 16:00:16.008
Version 11.2.0.1.0
Entered hgogprd
HOSGIP for "HS_FDS_TRACE_LEVEL" returned "Debug"
Entered hgosdip
setting HS_OPEN_CURSORS to default of 50
setting HS_FDS_RECOVERY_ACCOUNT to default of "RECOVER"
setting HS_FDS_RECOVERY_PWD to default value
setting HS_FDS_TRANSACTION_LOG to default of HS_TRANSACTION_LOG
setting HS_IDLE_TIMEOUT to default of 0
setting HS_FDS_TRANSACTION_ISOLATION to default of "READ_COMMITTED"
setting HS_NLS_NCHAR to default of "AL32UTF8"
setting HS_FDS_TIMESTAMP_MAPPING to default of "DATE"
setting HS_FDS_DATE_MAPPING to default of "DATE"
setting HS_RPC_FETCH_REBLOCKING to default of "ON"
setting HS_FDS_FETCH_ROWS to default of "100"
setting HS_FDS_RESULTSET_SUPPORT to default of "FALSE"
setting HS_FDS_RSET_RETURN_ROWCOUNT to default of "FALSE"
setting HS_FDS_PROC_IS_FUNC to default of "FALSE"
setting HS_FDS_CHARACTER_SEMANTICS to default of "FALSE"
setting HS_FDS_MAP_NCHAR to default of "TRUE"
setting HS_NLS_DATE_FORMAT to default of "YYYY-MM-DD HH24:MI:SS"
setting HS_FDS_REPORT_REAL_AS_DOUBLE to default of "FALSE"
setting HS_LONG_PIECE_TRANSFER_SIZE to default of "65536"
setting HS_SQL_HANDLE_STMT_REUSE to default of "FALSE"
setting HS_FDS_QUERY_DRIVER to default of "TRUE"
HOSGIP returned value of "FALSE" for HS_FDS_SUPPORT_STATISTICS
Parameter HS_FDS_QUOTE_IDENTIFIER is not set
setting HS_KEEP_REMOTE_COLUMN_SIZE to default of "OFF"
setting HS_FDS_GRAPHIC_TO_MBCS to default of "FALSE"
setting HS_FDS_MBCS_TO_GRAPHIC to default of "FALSE"
Default value of 64 assumed for HS_FDS_SQLLEN_INTERPRETATION
setting HS_CALL_NAME_ISP to "gtw$:SQLTables;gtw$:SQLColumns;gtw$:SQLPrimaryKeys;gtw$:SQLForeignKeys;gtw$:SQLProcedures;gtw$:SQLSt
atistics;gtw$:SQLGetInfo"
setting HS_FDS_DELAYED_OPEN to default of "TRUE"
setting HS_FDS_WORKAROUNDS to default of "0"
Exiting hgosdip, rc=0
ORACLE_SID is "identipass"
Product-Info:
Port Rls/Upd:1/0 PrdStat:0
Agent:Oracle Database Gateway for ODBC
Facility:hsa
Class:ODBC, ClassVsn:11.2.0.1.0_0008, Instance:identipass
Exiting hgogprd, rc=0
Entered hgoinit
HOCXU_COMP_CSET=1
HOCXU_DRV_CSET=873
HOCXU_DRV_NCHAR=873
HOCXU_DB_CSET=873
HOCXU_SEM_VER=112000
Entered hgolofn at 2010/11/18-16:00:16
HOSGIP for "HS_FDS_SHAREABLE_NAME" returned "/usr/local/unixODBC/lib/libodbc.so"
Entered hgolofns at 2010/11/18-16:00:16
symbol_peflctx=0x7a715450
hoaerr:0
Exiting hgolofns at 2010/11/18-16:00:16
Exiting hgolofn, rc=0 at 2010/11/18-16:00:16
HOSGIP for "HS_OPEN_CURSORS" returned "50"
HOSGIP for "HS_FDS_FETCH_ROWS" returned "100"
HOSGIP for "HS_LONG_PIECE_TRANSFER_SIZE" returned "65536"
HOSGIP for "HS_NLS_NUMERIC_CHARACTER" returned ".,"
HOSGIP for "HS_KEEP_REMOTE_COLUMN_SIZE" returned "OFF"
HOSGIP for "HS_FDS_DELAYED_OPEN" returned "TRUE"
HOSGIP for "HS_FDS_WORKAROUNDS" returned "0"
HOSGIP for "HS_FDS_MBCS_TO_GRAPHIC" returned "FALSE"
HOSGIP for "HS_FDS_GRAPHIC_TO_MBCS" returned "FALSE"
Invalid value of 64 given for HS_FDS_SQLLEN_INTERPRETATION
treat_SQLLEN_as_compiled = 1
Exiting hgoinit, rc=0 at 2010/11/18-16:00:16
Entered hgolgon at 2010/11/18-16:00:16
reco:0, name:identipass, tflag:0
Entered hgosuec at 2010/11/18-16:00:16
Exiting hgosuec, rc=0 at 2010/11/18-16:00:16
HOSGIP for "HS_FDS_RECOVERY_ACCOUNT" returned "RECOVER"
HOSGIP for "HS_FDS_TRANSACTION_LOG" returned "HS_TRANSACTION_LOG"
HOSGIP for "HS_FDS_TIMESTAMP_MAPPING" returned "DATE"
HOSGIP for "HS_FDS_DATE_MAPPING" returned "DATE"
HOSGIP for "HS_FDS_CHARACTER_SEMANTICS" returned "FALSE"
HOSGIP for "HS_FDS_MAP_NCHAR" returned "TRUE"
HOSGIP for "HS_FDS_RESULTSET_SUPPORT" returned "FALSE"
HOSGIP for "HS_FDS_RSET_RETURN_ROWCOUNT" returned "FALSE"
HOSGIP for "HS_FDS_PROC_IS_FUNC" returned "FALSE"
HOSGIP for "HS_FDS_REPORT_REAL_AS_DOUBLE" returned "FALSE"
using identipass as default value for "HS_FDS_DEFAULT_OWNER"
HOSGIP for "HS_SQL_HANDLE_STMT_REUSE" returned "FALSE"
Entered hgocont at 2010/11/18-16:00:16
HS_FDS_CONNECT_INFO = "identipass"
RC=-1 from HOSGIP for "HS_FDS_CONNECT_STRING"
Entered hgogenconstr at 2010/11/18-16:00:16
dsn:identipass, name:identipass
optn:
Entered hgocip at 2010/11/18-16:00:16
dsn:identipass
Exiting hgocip, rc=0 at 2010/11/18-16:00:16
Exiting hgogenconstr, rc=0 at 2010/11/18-16:00:16
Entered hgopoer at 2010/11/18-16:00:16
hgopoer, line 233: got native error 0 and sqlstate ; message follows...
Exiting hgopoer, rc=0 at 2010/11/18-16:00:16
hgocont, line 2753: calling SqlDriverConnect got sqlstate
Exiting hgocont, rc=28500 at 2010/11/18-16:00:16 with error ptr FILE:hgocont.c LINE:2772 ID:Something other than invalid authoriza
tion
Exiting hgolgon, rc=28500 at 2010/11/18-16:00:16 with error ptr FILE:hgolgon.c LINE:781 ID:Calling hgocont
Entered hgoexit at 2010/11/18-16:00:16
Exiting hgoexit, rc=0
Can anyone help me see what I'm missing?Thank you for your response.
I modified the envs LD_LIBRARY_PATH parameter in my SID_LIST_LISTENERODBC to be:
(ENV="LD_LIBRARY_PATH=/usr/local/freetds/lib:/usr/local/unixODBC/lib:/u01/app/oracle/product/11.2.0/db_1/lib:/
u01/app/oracle/product/11.2.0/db_1/hs/lib")
and bounced the listener, but I'm still getting the same error.
I do not have a lib64 directory in my Freetds installation, but all the files in the lib directory are 64-bit.
Here is a listing of my DG4ODBC init file:
/u01/app/oracle/product/11.2.0/db_1/hs/admin[PPRD]> more initidentipass.ora
# This is a sample agent init file that contains the HS parameters that are
# needed for an ODBC Agent.
# HS init parameters
HS_FDS_CONNECT_INFO = identipass
#HS_FDS_TRACE_LEVEL = 0
HS_FDS_TRACE_LEVEL = Debug
HS_FDS_SHAREABLE_NAME = /usr/local/unixODBC/lib/libodbc.so
HS_FDS_SUPPORT_STATISTICS=FALSE
HS_LANGUAGE=AMERICAN.AMERICA.WE8ISO8859P15
# ODBC specific environment variables
set ODBCINI=/usr/local/unixODBC/etc/odbc.ini
# Environment variables required for the non-Oracle system
#set <envvar>=<value>
Thanks for your help with this!
Catina -
SQLJ connection exception in oracle 8i and jdk 1.5
This is the code through which i am trying to extract current date from oracle database and print Helloworld
// import required packages
import java.sql.Date;
import java.sql.SQLException;
import oracle.sqlj.runtime.Oracle;
public class HelloWorld {
public static void main(String [] args) {
java.sql.Date current_date;
try {
// connect to the database
Oracle.connect(
"jdbc:oracle:thin:@localhost:1521:orcl",
"student",
"student"
// get the current date from the database
#sql { SELECT sysdate INTO :current_date FROM dual };
// display message
System.out.println("Hello World! The current date is " +
current_date);
} catch ( SQLException e ) {
System.err.println("SQLException " + e);
} finally {
try {
// disconnect from the database
Oracle.close();
} catch ( SQLException e ) {
System.err.println("SQLException " + e);
} // end of main()
this is the error
unexpected error occurred...
java.lang.ExceptionInInitializerError
at sqlj.translator.Translator.addUnit(Translator.java:117)
at sqlj.translator.Main.translate(Main.java:112)
at sqlj.translator.Main.runTranslation(Main.java:92)
at sqlj.translator.Main.runTranslation(Main.java:85)
at sqlj.tools.Sqlj.statusMain(Sqlj.java:280)
at sqlj.tools.Sqlj.main(Sqlj.java:125)
Caused by: java.lang.NullPointerException
at sqlj.framework.ClassFileReader.attribute_info(ClassFileReader.java:326)
at sqlj.framework.ClassFileReader.readClass(ClassFileReader.java:224)
at sqlj.framework.ClassFileReader.describeClass(ClassFileReader.java:62)
at sqlj.framework.ClassFileReader.getDeclaringClass(ClassFileReader.java:146)
at sqlj.framework.JSClass$ClassWrapper.getDeclaringClass(JSClass.java:1649)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1496)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1545)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1552)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1507)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1518)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1533)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1539)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1508)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1545)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1552)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1507)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1545)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1552)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1507)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1518)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1533)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1539)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1508)
at sqlj.framework.JSClass.resolveIfNonNull(JSClass.java:1513)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1493)
at sqlj.framework.JSClass.resolveIfNonNull(JSClass.java:1513)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1493)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1534)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1539)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1508)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1545)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1552)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1507)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1518)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1533)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1539)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1508)
at sqlj.framework.JSClass.resolveIfNonNull(JSClass.java:1513)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1493)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1545)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1552)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1507)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1518)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1494)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1518)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1533)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1539)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1508)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1518)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1533)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1539)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1508)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1534)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1539)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1508)
at sqlj.framework.JSClass.resolveIfNonNull(JSClass.java:1513)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1495)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1534)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1539)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1508)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1518)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1494)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1534)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1539)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1508)
at sqlj.framework.JSClass.resolveIfNonNull(JSClass.java:1513)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1493)
at sqlj.framework.JSClass.resolveIfNonNull(JSClass.java:1513)
at sqlj.framework.JSClass.resolveClassReferences(JSClass.java:1493)
at sqlj.framework.JSClass.reflectSystemClass(JSClass.java:1340)
at sqlj.framework.JSClass.<clinit>(JSClass.java:49)
... 6 more
HelloWorld.sqlj: Error: Exception caught:
Total 1 error.SQLJ 8i with jdk1.5?
Please try SQLJ 10.2 with jdk1.4. -
Trying to create and use of a packaged class....
Hi ,
I have created a directory and put there the generated class....
The dir structure is as:
C:\oracle_files\Java\Examples\
class_variables
common_classes
I have set the classpath to both the two above directories....
The ThreeBedroomHouse class which has been compiled and put into the \common_classes is as follows...:
package common_classes;
public class ThreeBedroomHouse
/*private class variable*/
The compilation(successful) was done as :
C:\oracle_files\Java\Examples\class_variables>
C:\oracle\product\10.2.0\database10g\jdk\bin\javac -d C:\oracle_files\Java\Examples\common_classes\ ThreeBedroomHouse.java
and the ThreeBedroomHouse.class file was generated in the "C:\oracle_files\Java\Examples\common_classes" directory....
I tried to compile the second .java file , called HomeBuilder -including a main()- with code such as:
import common_classes.*;
public class HomeBuilder
{When i try to compile it....
C:\oracle_files\Java\Examples\class_variables>C:\oracle\product\10.2.0\database10g\jdk\bin\javac HomeBuilder.java
I get the errors....
package common_classes does not exist....
Can you please pinpoint the error....?????
Many thanks ... for your help and info....
SimI have succedded in running it.....at last!!!! However , in a manner which is not understandable to me.....
That are the steps i 've taken.....
[pre]C:\oracle_files\Java\Examples\class_variables>set classpath
CLASSPATH=.;C:\oracle_files\Java\Examples
C:\oracle_files\Java\Examples\class_variables>C:\oracle\product\10.2.0\database10g\jdk\bin\javac -d C:\oracle_files\Java\Examples ThreeBedroomHouse.java
C:\oracle_files\Java\Examples\class_variables>C:\oracle\product\10.2.0\database10g\jdk\bin\javac HomeBuilder.java
HomeBuilder.java:28: cannot access ThreeBedroomHouse
bad class file: .\ThreeBedroomHouse.java
file does not contain class ThreeBedroomHouse
Please remove or make sure it appears in the correct subdirectory of the classpath.
ThreeBedroomHouse myHouse=new ThreeBedroomHouse();
*^
1 error
C:\oracle_files\Java\Examples\class_variables>set classpath=C:\oracle_files\Java\Examples
C:\oracle_files\Java\Examples\class_variables>C:\oracle\product\10.2.0\database10g\jdk\bin\javac HomeBuilder.java
C:\oracle_files\Java\Examples\class_variables>java HomeBuilder
Exception in thread "main" java.lang.NoClassDefFoundError: HomeBuilder
C:\oracle_files\Java\Examples\class_variables>set classpath=.,C:\oracle_files\Java\Examples
C:\oracle_files\Java\Examples\class_variables>java HomeBuilder
Exception in thread "main" java.lang.NoClassDefFoundError: HomeBuilder
C:\oracle_files\Java\Examples\class_variables>set classpath=.;C:\oracle_files\Java\Examples
C:\oracle_files\Java\Examples\class_variables>java HomeBuilder
3
3
4
4
C:\oracle_files\Java\Examples\class_variables>The above in bold are the 'critical' points in the whole procedure.....
First of all , i have deleted the ThreeBedroom.class file generated and i have compiled as such
C:\oracle_files\Java\Examples\class_variables>C:\oracle\product\10.2.0\database10g\jdk\bin\javac -d C:\oracle_files\Java\Examples ThreeBedroomHouse.java
Then , i have realized that i have made a mistake at setting the classpath ..... I have seperated the two entries ('.' and <directory path>) with a comma instead of a semicolon ';'.....
But something i cannot understand is......
when i have set the classpath as : CLASSPATH=.;C:\oracle_files\Java\Examples the compilation of the HomeBuilder.java is unsuccessful ....
I have to set the CLASSPATH as CLASSPATH=C:\oracle_files\Java\Examples
without the 'characters' *.;* to have it compiled successfully......
Afterwards... if i try to execute the compiled .class file with the current classpath ... the java exe file produces error again.....
I have to set it at its previous setting in order to run it successfully.....
All this description is shown above......
Can you please explain this 'strange(????) behavior'....?????
Many thanks...
Sim -
Calling Oracle Export and Import in java
Hi,
I am trying to call oracle export and import utilites in my java application,
can anyone help me that how can i do this, plz consider the case as this is a part of my project..
Regards
AshishYou should just be able to call the "imp" and "exp" executables ($ORACLE_HOME/bin) using the Runtime class. You can setup the various parameters for export / import in a parameter file.
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html
http://www.orafaq.com/faqiexp.htm -
Having trouble with an installation of the XML parser on Oracle 8i, hoping someone here has seen this one before.
The following error comes up each time the parser is called in PL/SQL:
ORA-29540: class oracle/xml/parser/plsql/XMLParserCover does not exist
Now, a quick check of all_objects says the parser is present and valid. Oddly enough, this statement is being returned within a procedure which compiled successfully - seems to me Oracle would not let the prodedure compile were it not present.
Anyone have any knowledge about this?
M<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by xmlteam():
Would you provide Database version and error messages?<HR></BLOCKQUOTE>
My database version is Oracle 8i and my Oracle XML Utility version in OracleXSU111.
null -
I have JDK 1.5 Update 1 installed in my system and have Oracle 8.1.7 database . I have successfully connected both using ODBC data sources in my Windows XP SP2. Can i connect them using URL address, like we can do in Oracle 9i and later databases of Oracle.
thanks in advance
Sujeethi all!
by this im stopping my question as i solved it today. i was not using the url format, so was the problem giving starnge messages.
solution :
if using JDK 1.4.2 download ojdbc14.jar and set it on ur classpath. url format is as shown below :
jdbc:oracle:thin:@<host>:<port1521>:<sid>
write the following sample code.........
import java.sql.*;
class Preeti
public static void main(String[] args) throws SQLException
Connection con;
DatabaseMetaData meta;
String url = "jdbc:oracle:thin:@sujeet:1521:ram";
String user = "scott";
String password = "tiger";
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
con = DriverManager.getConnection(url, user, password);
Statement stmt = con.createStatement();
ResultSet rst = stmt.executeQuery("select * from emp");
meta = con.getMetaData();
System.out.println("Got Results............");
System.out.println("DBMS : " + meta.getDatabaseProductName());
//System.out.println("Version : " + meta.getDatabaseMajorVersion());
System.out.println("JDBC Driver Name : " + meta.getDriverName());
System.out.println("JDBC Driver Version : " + meta.getDriverVersion());
while(rst.next())
System.out.println(rst.getString(1));
con.close();
} -
Oracle SQL and PL/SQL interview questions.
Can anyone forward me all Oracle SQL and PL/SQL Interview questions and answers asap.
Many Thanks.
BbaDear Pal
I not sure all the all answers are correct. I got one mail couple yrs back. I am just sharing mail contents. Kindly keep question and compare answers.
1 Which is more faster - IN or EXISTS?
EXISTS is more faster than IN because EXISTS returns a Boolean value whereas IN returns a value.
2 Which datatype is used for storing graphics and images?
LONG RAW data type is used for storing BLOB's (binary large objects).
3 When do you use WHERE clause and when do you use HAVING clause?
HAVING clause is used when you want to specify a condition for a group function and it is written after GROUP BY clause. The WHERE clause is used when you want to specify a condition for columns, single row functions except group functions and it is written before GROUP BY clause if it is used.
4 What WHERE CURRENT OF clause does in a cursor?
LOOPSELECT num_credits INTO v_numcredits FROM classesWHERE dept=123 and course=101;UPDATE studentsSET current_credits=current_credits+v_numcreditsWHERE CURRENT OF X;END LOOPCOMMIT;END;
5 What should be the return type for a cursor variable.Can we use a scalar data type as return type?
The return type for a cursor must be a record type.It can be declared explicitly as a user-defined or %ROWTYPE can be used. eg TYPE t_studentsref IS REF CURSOR RETURN students%ROWTYPE
6 What is use of a cursor variable? How it is defined?
A cursor variable is associated with different statements at run time, which can hold different values at run time. Static cursors can only be associated with one run time query. A cursor variable is reference type (like a pointer in C).Declaring a cursor variable:TYPE type_name IS REF CURSOR RETURN return_type type_name is the name of the reference type,return_type is a record type indicating the types of the select list that will eventually be returned by the cursor variable.
7 What is the purpose of a cluster?
Oracle does not allow a user to specifically locate tables, since that is a part of the function of the RDBMS. However, for the purpose of increasing performance, oracle allows a developer to create a CLUSTER. A CLUSTER provides a means for storing data from different tables together for faster retrieval than if the table placement were left to the RDBMS.
8 What is the maximum buffer size that can be specified using the DBMS_OUTPUT.ENABLE function?
1,000,00
9 What is syntax for dropping a procedure and a function .Are these operations possible?
Drop Procedure procedure_nameDrop Function function_name
10 What is OCI. What are its uses?
Oracle Call Interface is a method of accesing database from a 3GL program. Uses--No precompiler is required,PL/SQL blocks are executed like other DML statements. The OCI library provides· -functions to parse SQL statemets· -bind input variables· -bind output variables· -execute statements· -fetch the results
11 What is difference between UNIQUE and PRIMARY KEY constraints?
A table can have only one PRIMARY KEY whereas there can be any number of UNIQUE keys. The columns that compose PK are automatically define NOT NULL, whereas a column that compose a UNIQUE is not automatically defined to be mandatory must also specify the column is NOT NULL.
12 What is difference between SUBSTR and INSTR?
SUBSTR returns a specified portion of a string eg SUBSTR('BCDEF',4) output BCDEINSTR provides character position in which a pattern is found in a string. eg INSTR('ABC-DC-F','-',2) output 7 (2nd occurence of '-')
13 What is difference between SQL and SQL*PLUS?
SQL*PLUS is a command line tool where as SQL and PL/SQL language interface and reporting tool. Its a command line tool that allows user to type SQL commands to be executed directly against an Oracle database. SQL is a language used to query the relational database(DML,DCL,DDL). SQL*PLUS commands are used to format query result, Set options, Edit SQL commands and PL/SQL.
14 What is difference between Rename and Alias?
Rename is a permanent name given to a table or column whereas Alias is a temporary name given to a table or column which do not exist once the SQL statement is executed.
15 What is difference between a formal and an actual parameter?
The variables declared in the procedure and which are passed, as arguments are called actual, the parameters in the procedure declaration. Actual parameters contain the values that are passed to a procedure and receive results. Formal parameters are the placeholders for the values of actual parameters
16 What is an UTL_FILE.What are different procedures and functions associated with it?
UTL_FILE is a package that adds the ability to read and write to operating system files. Procedures associated with it are FCLOSE, FCLOSE_ALL and 5 procedures to output data to a file PUT, PUT_LINE, NEW_LINE, PUTF, FFLUSH.PUT, FFLUSH.PUT_LINE,FFLUSH.NEW_LINE. Functions associated with it are FOPEN, ISOPEN.
17 What is a view ?
A view is stored procedure based on one or more tables, its a virtual table.
18 What is a pseudo column. Give some examples?
It is a column that is not an actual column in the table.eg USER, UID, SYSDATE, ROWNUM, ROWID, NULL, AND LEVEL.
19 What is a OUTER JOIN?
Outer Join--Its a join condition used where you can query all the rows of one of the tables in the join condition even though they dont satisfy the join condition.
20 What is a cursor?
Oracle uses work area to execute SQL statements and store processing information PL/SQL construct called a cursor lets you name a work area and access its stored information A cursor is a mechanism used to fetch more than one row in a Pl/SQl block.
21 What is a cursor for loop?
Cursor For Loop is a loop where oracle implicitly declares a loop variable, the loop index that of the same record type as the cursor's record.
22 What are various privileges that a user can grant to another user?
· SELECT· CONNECT· RESOURCES
23 What are various constraints used in SQL?
· NULL· NOT NULL· CHECK· DEFAULT
24 What are ORACLE PRECOMPILERS?
Using ORACLE PRECOMPILERS, SQL statements and PL/SQL blocks can be contained inside 3GL programs written in C,C++,COBOL,PASCAL, FORTRAN,PL/1 AND ADA.The Precompilers are known as Pro*C,Pro*Cobol,...This form of PL/SQL is known as embedded pl/sql,the language in which pl/sql is embedded is known as the host language. The prcompiler translates the embedded SQL and pl/sql ststements into calls to the precompiler runtime library.The output must be compiled and linked with this library to creater an executable.
25 What are different Oracle database objects?
· TABLES· VIEWS· INDEXES· SYNONYMS· SEQUENCES· TABLESPACES etc
26 What are different modes of parameters used in functions and procedures?
· IN· OUT· INOUT
27 What are cursor attributes?
· %ROWCOUNT· %NOTFOUND· %FOUND· %ISOPEN
28 What a SELECT FOR UPDATE cursor represent. [ANSWER]SELECT......FROM......FOR......UPDATE[OF column-reference][NOWAIT] The processing done in a fetch loop modifies the rows that have been retrieved by the cursor. A convenient way of modifying the rows is done by a method with two parts: the FOR UPDATE clause in the cursor declaration, WHERE CURRENT OF CLAUSE in an UPDATE or declaration statement.
29 There is a string 120000 12 0 .125 , how you will find the position of the decimal place?
INSTR('120000 12 0 .125',1,'.')output 13
30 There is a % sign in one field of a column. What will be the query to find it?
'' Should be used before '%'.
31 Suppose a customer table is having different columns like customer no, payments.What will be the query to select top three max payments?
SELECT customer_no, payments from customer C1
WHERE 3<=(SELECT COUNT(*) from customer C2
WHERE C1.payment <= C2.payment)
32 minvalue.sql Select the Nth lowest value from a table
select level, min('col_name') from my_table where level = '&n' connect by prior ('col_name') <
'col_name')
group by level;
Example:
Given a table called emp with the following columns:
-- id number
-- name varchar2(20)
-- sal number
-- For the second lowest salary:
-- select level, min(sal) from emp
-- where level=2
-- connect by prior sal < sal
-- group by level
33 maxvalue.sql Select the Nth Highest value from a table
select level, max('col_name') from my_table where level = '&n' connect by prior ('col_name') >
'col_name')
group by level;
Example:
Given a table called emp with the following columns:
-- id number
-- name varchar2(20)
-- sal number
-- For the second highest salary:
-- select level, max(sal) from emp
-- where level=2
-- connect by prior sal > sal
-- group by level
34 How you will avoid your query from using indexes?
SELECT * FROM emp
Where emp_no+' '=12345;
i.e you have to concatenate the column name with space within codes in the where condition.
SELECT /*+ FULL(a) */ ename, emp_no from emp
where emp_no=1234;
i.e using HINTS
35 How you will avoid duplicating records in a query?
By using DISTINCT
36 How you were passing cursor variables in PL/SQL 2.2?
In PL/SQL 2.2 cursor variables cannot be declared in a package.This is because the storage for a cursor variable has to be allocated using Pro*C or OCI with version 2.2, the only means of passing a cursor variable to a PL/SQL block is via bind variable or a procedure parameter.
37 How you open and close a cursor variable.Why it is required?
OPEN cursor variable FOR SELECT...Statement
CLOSE cursor variable In order to associate a cursor variable with a particular SELECT statement OPEN syntax is used. In order to free the resources used for the query CLOSE statement is used.
38 How will you delete duplicating rows from a base table?
delete from table_name where rowid not in (select max(rowid) from table group by duplicate_values_field_name); or
delete duplicate_values_field_name dv from table_name ta where rowid <(select min(rowid) from table_name tb where ta.dv=tb.dv);
39 How do you find the numbert of rows in a Table ?
A bad answer is count them (SELECT COUNT(*) FROM table_name)
A good answer is :-
'By generating SQL to ANALYZE TABLE table_name COUNT STATISTICS by querying Oracle System Catalogues (e.g. USER_TABLES or ALL_TABLES).
The best answer is to refer to the utility which Oracle released which makes it unnecessary to do ANALYZE TABLE for each Table individually.
40 Find out nth highest salary from emp table
SELECT DISTINCT (a.sal) FROM EMP A WHERE &N = (SELECT COUNT (DISTINCT (b.sal)) FROM EMP B WHERE a.sal<=b.sal);
For Eg:-
Enter value for n: 2
SAL
3700
41 Display the records between two range?
select rownum, empno, ename from emp where rowid in (select rowid from emp where rownum <=&upto minus select rowid from emp where rownum<&Start);
42 Display the number value in Words?
SQL> select sal, (to_char(to_date(sal,'j'), 'jsp'))
from emp;
the output like,
SAL (TO_CHAR(TO_DATE(SAL,'J'),'JSP'))
800 eight hundred
1600 one thousand six hundred
1250 one thousand two hundred fifty
If you want to add some text like, Rs. Three Thousand only.
SQL> select sal "Salary ",
(' Rs. '|| (to_char(to_date(sal,'j'), 'Jsp'))|| ' only.'))
"Sal in Words" from emp
Salary Sal in Words
800 Rs. Eight Hundred only.
1600 Rs. One Thousand Six Hundred only.
1250 Rs. One Thousand Two Hundred Fifty only.
43 Display Odd/ Even number of records
Odd number of records:
select * from emp where (rowid,1) in (select rowid, mod(rownum,2) from emp);
Output:-
1
3
5
Even number of records:
select * from emp where (rowid,0) in (select rowid, mod(rownum,2) from emp)
Output:-
2
4
6
44 Difference between procedure and function.
Functions are named PL/SQL blocks that return a value and can be called with arguments procedure a named block that can be called with parameter. A procedure all is a PL/SQL statement by itself, while a Function call is called as part of an expression.
45 Difference between NO DATA FOUND and %NOTFOUND
NO DATA FOUND is an exception raised only for the SELECT....INTO statements when the where clause of the querydoes not match any rows. When the where clause of the explicit cursor does not match any rows the %NOTFOUND attribute is set to TRUE instead.
46 Difference between database triggers and form triggers?
Data base trigger(DBT) fires when a DML operation is performed on a data base table. Form trigger(FT) Fires when user presses a key or navigates between fields on the screen
Can be row level or statement level No distinction between row level and statement level.
Can manipulate data stored in Oracle tables via SQL Can manipulate data in Oracle tables as well as variables in forms.
Can be fired from any session executing the triggering DML statements. Can be fired only from the form that define the trigger.
Can cause other database triggers to fire.Can cause other database triggers to fire, but not other form triggers.
47 Difference between an implicit & an explicit cursor.
PL/SQL declares a cursor implicitly for all SQL data manipulation statements, including quries that return only one row. However,queries that return more than one row you must declare an explicit cursor or use a cursor FOR loop.
Explicit cursor is a cursor in which the cursor name is explicitly assigned to a SELECT statement via the CURSOR...IS statement. An implicit cursor is used for all SQL statements Declare, Open, Fetch, Close. An explicit cursors are used to process multirow SELECT statements An implicit cursor is used to process INSERT, UPDATE, DELETE and single row SELECT. .INTO statements.
48 Can you use a commit statement within a database trigger?
No.
49 Can the default values be assigned to actual parameters?
Yes
50 Can cursor variables be stored in PL/SQL tables.If yes how. If not why?
No, a cursor variable points a row which cannot be stored in a two-dimensional PL/SQL table.
51 Can a primary key contain more than one columns?
Yes
52 Can a function take OUT parameters. If not why?
No. A function has to return a value,an OUT parameter cannot return a value.
53 What are various joins used while writing SUBQUERIES?
Self join-Its a join foreign key of a table references the same table. Outer Join--Its a join condition used where One can query all the rows of one of the tables in the join condition even though they don't satisfy the join condition.
Equi-join--Its a join condition that retrieves rows from one or more tables in which one or more columns in one table are equal to one or more columns in the second table.
54 Differentiate between TRUNCATE and DELETE
TRUNCATE deletes much faster than DELETE
TRUNCATE
DELETE
It is a DDL statement It is a DML statement
It is a one way trip,cannot ROLLBACK One can Rollback
Doesn't have selective features (where clause) Has
Doesn't fire database triggers Does
It requires disabling of referential constraints. Does not require
1 What is PL/SQL ?
PL/SQL is a procedural language that has both interactive SQL and procedural programming language constructs such as iteration, conditional branching.
2 Write the order of precedence for validation of a column in a table ?
I. done using Database triggers.
ii. done using Integarity Constraints.
I & ii.
Exception :
3 Where the Pre_defined_exceptions are stored ?
In the standard package.
Procedures, Functions & Packages ;
4 What are % TYPE and % ROWTYPE ? What are the advantages of using these over datatypes?
% TYPE provides the data type of a variable or a database column to that variable.
% ROWTYPE provides the record type that represents a entire row of a table or view or columns selected in the cursor.
The advantages are : I. Need not know about variable's data type
ii. If the database definition of a column in a table changes, the data type of a variable changes accordingly.
5 What will happen after commit statement ?
Cursor C1 is
Select empno,
ename from emp;
Begin
open C1; loop
Fetch C1 into
eno.ename;
Exit When
C1 %notfound;-----
commit;
end loop;
end;
The cursor having query as SELECT .... FOR UPDATE gets closed after COMMIT/ROLLBACK.
The cursor having query as SELECT.... does not get closed even after COMMIT/ROLLBACK.
6 What is the basic structure of PL/SQL ?
PL/SQL uses block structure as its basic structure. Anonymous blocks or nested blocks can be used in PL/SQL.
7 What is Raise_application_error ?
Raise_application_error is a procedure of package DBMS_STANDARD which allows to issue an user_defined error messages from stored sub-program or database trigger.
8 What is Pragma EXECPTION_INIT ? Explain the usage ?
The PRAGMA EXECPTION_INIT tells the complier to associate an exception with an oracle error. To get an error message of a specific oracle error.
e.g. PRAGMA EXCEPTION_INIT (exception name, oracle error number)
9 What is PL/SQL table ?
Objects of type TABLE are called "PL/SQL tables", which are modeled as (but not the same as) database tables, PL/SQL tables use a primary PL/SQL tables can have one column and a primary key.
Cursors
10 What is Overloading of procedures ?
The Same procedure name is repeated with parameters of different datatypes and parameters in different positions, varying number of parameters is called overloading of procedures.
e.g. DBMS_OUTPUT put_line
What is a package ? What are the advantages of packages ?
11 What is difference between a PROCEDURE & FUNCTION ?
A FUNCTION is always returns a value using the return statement.
A PROCEDURE may return one or more values through parameters or may not return at all.
12 What is difference between a Cursor declared in a procedure and Cursor declared in a package specification ?
A cursor declared in a package specification is global and can be accessed by other procedures or procedures in a package.
A cursor declared in a procedure is local to the procedure that can not be accessed by other procedures.
13 What is difference between % ROWTYPE and TYPE RECORD ?
% ROWTYPE is to be used whenever query returns a entire row of a table or view.
TYPE rec RECORD is to be used whenever query returns columns of different
table or views and variables.
E.g. TYPE r_emp is RECORD (eno emp.empno% type,ename emp ename %type
e_rec emp% ROWTYPE
cursor c1 is select empno,deptno from emp;
e_rec c1 %ROWTYPE.
14 What is an Exception ? What are types of Exception ?
Exception is the error handling part of PL/SQL block. The types are Predefined and user defined. Some of Predefined exceptions are.
CURSOR_ALREADY_OPEN
DUP_VAL_ON_INDEX
NO_DATA_FOUND
TOO_MANY_ROWS
INVALID_CURSOR
INVALID_NUMBER
LOGON_DENIED
NOT_LOGGED_ON
PROGRAM-ERROR
STORAGE_ERROR
TIMEOUT_ON_RESOURCE
VALUE_ERROR
ZERO_DIVIDE
OTHERS.
15 What is a stored procedure ?
A stored procedure is a sequence of statements that perform specific function.
16 What is a database trigger ? Name some usages of database trigger ?
Database trigger is stored PL/SQL program unit associated with a specific database table. Usages are Audit data modifications, Log events transparently, Enforce complex business rules Derive column values automatically, Implement complex security authorizations. Maintain replicate tables.
17 What is a cursor for loop ?
Cursor for loop implicitly declares %ROWTYPE as loop index,opens a cursor, fetches rows of values from active set into fields in the record and closes
when all the records have been processed.
eg. FOR emp_rec IN C1 LOOP
salary_total := salary_total +emp_rec sal;
END LOOP;
18 What is a cursor ? Why Cursor is required ?
Cursor is a named private SQL area from where information can be accessed. Cursors are required to process rows individually for queries returning multiple rows.
19 What happens if a procedure that updates a column of table X is called in a database trigger of the same table ?
Mutation of table occurs.
20 What are two virtual tables available during database trigger execution ?
The table columns are referred as OLD.column_name and NEW.column_name.
For triggers related to INSERT only NEW.column_name values only available.
For triggers related to UPDATE only OLD.column_name NEW.column_name values only available.
For triggers related to DELETE only OLD.column_name values only available.
21 What are two parts of package ?
The two parts of package are PACKAGE SPECIFICATION & PACKAGE BODY.
Package Specification contains declarations that are global to the packages and local to the schema.
Package Body contains actual procedures and local declaration of the procedures and cursor declarations.
22 What are the two parts of a procedure ?
Procedure Specification and Procedure Body.
23 What are the return values of functions SQLCODE and SQLERRM ?
SQLCODE returns the latest code of the error that has occurred.
SQLERRM returns the relevant error message of the SQLCODE.
24 What are the PL/SQL Statements used in cursor processing ?
DECLARE CURSOR cursor name, OPEN cursor name, FETCH cursor name INTO or Record types, CLOSE cursor name.
25 What are the modes of parameters that can be passed to a procedure ?
IN,OUT,IN-OUT parameters.
26 What are the datatypes a available in PL/SQL ?
Some scalar data types such as NUMBER, VARCHAR2, DATE, CHAR, LONG, BOOLEAN.
Some composite data types such as RECORD & TABLE.
27 What are the cursor attributes used in PL/SQL ?
%ISOPEN - to check whether cursor is open or not
% ROWCOUNT - number of rows fetched/updated/deleted.
% FOUND - to check whether cursor has fetched any row. True if rows are fetched.
% NOT FOUND - to check whether cursor has fetched any row. True if no rows are featched.
These attributes are proceeded with SQL for Implicit Cursors and with Cursor name for Explicit Cursors.
28 What are the components of a PL/SQL Block ?
Declarative part, Executable part and Exception part.
Datatypes PL/SQL
29 What are the components of a PL/SQL block ?
A set of related declarations and procedural statements is called block.
30 What are advantages fo Stored Procedures /
Extensibility,Modularity, Reusability, Maintainability and one time compilation.
1 What is PL/SQL ?
PL/SQL is a procedural language that has both interactive SQL and procedural programming language constructs such as iteration, conditional branching.
2 Write the order of precedence for validation of a column in a table ?
I. done using Database triggers.
ii. done using Integarity Constraints.
I & ii.
Exception :
3 Where the Pre_defined_exceptions are stored ?
In the standard package.
Procedures, Functions & Packages ;
4 What are % TYPE and % ROWTYPE ? What are the advantages of using these over datatypes?
% TYPE provides the data type of a variable or a database column to that variable.
% ROWTYPE provides the record type that represents a entire row of a table or view or columns selected in the cursor.
The advantages are : I. Need not know about variable's data type
ii. If the database definition of a column in a table changes, the data type of a variable changes accordingly.
5 What will happen after commit statement ?
Cursor C1 is
Select empno,
ename from emp;
Begin
open C1; loop
Fetch C1 into
eno.ename;
Exit When
C1 %notfound;-----
commit;
end loop;
end;
The cursor having query as SELECT .... FOR UPDATE gets closed after COMMIT/ROLLBACK.
The cursor having query as SELECT.... does not get closed even after COMMIT/ROLLBACK.
6 What is the basic structure of PL/SQL ?
PL/SQL uses block structure as its basic structure. Anonymous blocks or nested blocks can be used in PL/SQL.
7 What is Raise_application_error ?
Raise_application_error is a procedure of package DBMS_STANDARD which allows to issue an user_defined error messages from stored sub-program or database trigger.
8 What is Pragma EXECPTION_INIT ? Explain the usage ?
The PRAGMA EXECPTION_INIT tells the complier to associate an exception with an oracle error. To get an error message of a specific oracle error.
e.g. PRAGMA EXCEPTION_INIT (exception name, oracle error number)
9 What is PL/SQL table ?
Objects of type TABLE are called "PL/SQL tables", which are modeled as (but not the same as) database tables, PL/SQL tables use a primary PL/SQL tables can have one column and a primary key.
Cursors
10 What is Overloading of procedures ?
The Same procedure name is repeated with parameters of different datatypes and parameters in different positions, varying number of parameters is called overloading of procedures.
e.g. DBMS_OUTPUT put_line
What is a package ? What are the advantages of packages ?
11 What is difference between a PROCEDURE & FUNCTION ?
A FUNCTION is always returns a value using the return statement.
A PROCEDURE may return one or more values through parameters or may not return at all.
12 What is difference between a Cursor declared in a procedure and Cursor declared in a package specification ?
A cursor declared in a package specification is global and can be accessed by other procedures or procedures in a package.
A cursor declared in a procedure is local to the procedure that can not be accessed by other procedures.
13 What is difference between % ROWTYPE and TYPE RECORD ?
% ROWTYPE is to be used whenever query returns a entire row of a table or view.
TYPE rec RECORD is to be used whenever query returns columns of different
table or views and variables.
E.g. TYPE r_emp is RECORD (eno emp.empno% type,ename emp ename %type
e_rec emp% ROWTYPE
cursor c1 is select empno,deptno from emp;
e_rec c1 %ROWTYPE.
14 What is an Exception ? What are types of Exception ?
Exception is the error handling part of PL/SQL block. The types are Predefined and user defined. Some of Predefined exceptions are.
CURSOR_ALREADY_OPEN
DUP_VAL_ON_INDEX
NO_DATA_FOUND
TOO_MANY_ROWS
INVALID_CURSOR
INVALID_NUMBER
LOGON_DENIED
NOT_LOGGED_ON
PROGRAM-ERROR
STORAGE_ERROR
TIMEOUT_ON_RESOURCE
VALUE_ERROR
ZERO_DIVIDE
OTHERS.
15 What is a stored procedure ?
A stored procedure is a sequence of statements that perform specific function.
16 What is a database trigger ? Name some usages of database trigger ?
Database trigger is stored PL/SQL program unit associated with a specific database table. Usages are Audit data modifications, Log events transparently, Enforce complex business rules Derive column values automatically, Implement complex security authorizations. Maintain replicate tables.
17 What is a cursor for loop ?
Cursor for loop implicitly declares %ROWTYPE as loop index,opens a cursor, fetches rows of values from active set into fields in the record and closes
when all the records have been processed.
eg. FOR emp_rec IN C1 LOOP
salary_total := salary_total +emp_rec sal;
END LOOP;
18 What is a cursor ? Why Cursor is required ?
Cursor is a named private SQL area from where information can be accessed. Cursors are required to process rows individually for queries returning multiple rows.
19 What happens if a procedure that updates a column of table X is called in a database trigger of the same table ?
Mutation of table occurs.
20 What are two virtual tables available during database trigger execution ?
The table columns are referred as OLD.column_name and NEW.column_name.
For triggers related to INSERT only NEW.column_name values only available.
For triggers related to UPDATE only OLD.column_name NEW.column_name values only available.
For triggers related to DELETE only OLD.column_name values only available.
21 What are two parts of package ?
The two parts of package are PACKAGE SPECIFICATION & PACKAGE BODY.
Package Specification contains declarations that are global to the packages and local to the schema.
Package Body contains actual procedures and local declaration of the procedures and cursor declarations.
22 What are the two parts of a procedure ?
Procedure Specification and Procedure Body.
23 What are the return values of functions SQLCODE and SQLERRM ?
SQLCODE returns the latest code of the error that has occurred.
SQLERRM returns the relevant error message of the SQLCODE.
24 What are the PL/SQL Statements used in cursor processing ?
DECLARE CURSOR cursor name, OPEN cursor name, FETCH cursor name INTO or Record types, CLOSE cursor name.
25 What are the modes of parameters that can be passed to a procedure ?
IN,OUT,IN-OUT parameters.
26 What are the datatypes a available in PL/SQL ?
Some scalar data types such as NUMBER, VARCHAR2, DATE, CHAR, LONG, BOOLEAN.
Some composite data types such as RECORD & TABLE.
27 What are the cursor attributes used in PL/SQL ?
%ISOPEN - to check whether cursor is open or not
% ROWCOUNT - number of rows fetched/updated/deleted.
% FOUND - to check whether cursor has fetched any row. True if rows are fetched.
% NOT FOUND - to check whether cursor has fetched any row. True if no rows are featched.
These attributes are proceeded with SQL for Implicit Cursors and with Cursor name for Explicit Cursors.
28 What are the components of a PL/SQL Block ?
Declarative part, Executable part and Exception part.
Datatypes PL/SQL
29 What are the components of a PL/SQL block ?
A set of related declarations and procedural statements is called block.
30 What are advantages fo Stored Procedures /
Extensibility,Modularity, Reusability, Maintainability and one time compilation.
31 Name the tables where characteristics of Package, procedure and functions are stored ?
User_objects, User_Source and User_error.
32 Is it possible to use Transaction control Statements such a ROLLBACK or COMMIT in Database Trigger ? Why ?
It is not possible. As triggers are defined for each table, if you use COMMIT of ROLLBACK in a trigger, it affects logical transaction processing.
33 How packaged procedures and functions are called from the following?
a. Stored procedure or anonymous block
b. an application program such a PRC C, PRO COBOL
c. SQL *PLUS
a. PACKAGE NAME.PROCEDURE NAME (parameters);
variable := PACKAGE NAME.FUNCTION NAME (arguments);
EXEC SQL EXECUTE
b.
BEGIN
PACKAGE NAME.PROCEDURE NAME (parameters)
variable := PACKAGE NAME.FUNCTION NAME (arguments);
END;
END EXEC;
c. EXECUTE PACKAGE NAME.PROCEDURE if the procedures does not have any
out/in-out parameters. A function can not be called.
34 How many types of database triggers can be specified on a table ? What are they ?
Insert Update Delete
Before Row o.k. o.k. o.k.
After Row o.k. o.k. o.k.
Before Statement o.k. o.k. o.k.
After Statement o.k. o.k. o.k.
If FOR EACH ROW clause is specified, then the trigger for each Row affected by the statement.
If WHEN clause is specified, the trigger fires according to the returned Boolean value.
35 Give the structure of the procedure ?
PROCEDURE name (parameter list.....)
is
local variable declarations
BEGIN
Executable statements.
Exception.
exception handlers
end;
36 Give the structure of the function ?
FUNCTION name (argument list .....) Return datatype is
local variable declarations
Begin
executable statements
Exception
execution handlers
End;
37 Explain the usage of WHERE CURRENT OF clause in cursors ?
WHERE CURRENT OF clause in an UPDATE,DELETE statement refers to the latest row fetched from a cursor.
Database Triggers
38 Explain the two type of Cursors ?
There are two types of cursors, Implicit Cursor and Explicit Cursor.
PL/SQL uses Implicit Cursors for queries.
User defined cursors are called Explicit Cursors. They can be declared and used.
39 Explain how procedures and functions are called in a PL/SQL block ?
Function is called as part of an expression.
sal := calculate_sal ('a822');
procedure is called as a PL/SQL statement
calculate_bonus ('A822');
Programmatic Constructs
Last Update: September 06, 2004
1 What are the different types of PL/SQL program units that can be defined and stored in ORACLE database ?
Procedures and Functions,Packages and Database Triggers.
2 What are the differences between Database Trigger and Integrity constraints ?
A declarative integrity constraint is a statement about the database that is always true. A constraint applies to existing data in the table and any statement that manipulates the table.
A trigger does not apply to data loaded before the definition of the trigger, therefore, it does not guarantee all data in a table conforms to the rules established by an associated trigger.
A trigger can be used to enforce transitional constraints where as a declarative integrity constraint cannot be used.
3 What is difference between Procedures and Functions ?
A Function returns a value to the caller where as a Procedure does not.
4 What is Database Trigger ?
A Database Trigger is procedure (set of SQL and PL/SQL statements) that is automatically executed as a result of an insert in,update to, or delete from a table.
5 What is a Procedure ?
A Procedure consist of a set of SQL and PL/SQL statements that are grouped together as a unit to solve a specific problem or perform a set of related tasks.
6 What is a Package ?
A Package is a collection of related procedures, functions, variables and other package constructs together as a unit in the database.
7 What are the uses of Database Trigger ?
Database triggers can be used to automatic data generation, audit data modifications, enforce complex Integrity constraints, and customize complex security authorizations.
8 What are the advantages of having a Package ?
Increased functionality (for example,global package variables can be declared and used by any proecdure in the package) and performance (for example all objects of the package are parsed compiled, and loaded into memory once)
1 With which function of summary item is the compute at options required?
percentage of total functions.
2 Why is it preferable to create a fewer no. of queries in the data model?
Because for each query, report has to open a separate cursor and has to rebind, execute and fetch data.
3 Why is a Where clause faster than a group filter or a format trigger?
Because, in a where clause the condition is applied during data retrieval than after retrieving the data.
4 Which parameter can be used to set read level consistency across multiple queries?
Read only.
5 Which of the two views should objects according to possession?
view by structure.
6 Which of the above methods is the faster method?
performing the calculation in the query is faster.
7 Where is the external query executed at the client or the server?
At the server.
8 Where is a procedure return in an external pl/sql library executed at the client or at the server?
At the client.
9 When do you use data parameter type?
When the value of a data parameter being passed to a called product is always the name of the record group defined in the current form. Data parameters are used to pass data to produts invoked with the run_product built-in subprogram.
10 When a form is invoked with call_form, Does oracle forms issues a save point?
Yes
11 What are the important difference between property clause and visual attributes?
Named visual attributes differ only font, color & pattern attributes, property clauses can contain this and any other properties. You can change the appearance of objects at run time by changing the named visual attributes programmatically , property clause assignments cannot be changed programmatically. When an object is inheriting from both a property clause and named visual attribute, the named visual attribute settings take precedence, and any visual attribute properties in the class are ignored.
12 What use of command line parameter cmd file?
It is a command line argument that allows you to specify a file that contain a set of arguments for r20run.
13 What is WHEN-Database-record trigger?
Fires when oracle forms first marks a record as an insert or an update. The trigger fires as soon as oracle forms determines through validation that the record should be processed by the next post or commit as an insert or update. c generally occurs only when the operators modifies the first item in the record, and after the operator attempts to navigate out of the item.
14 What is use of term?
The term file which key is correspond to which oracle report functions.
15 What is trigger associated with the timer?
When-timer-expired.
16 What is the use of transactional triggers?
Using transactional triggers we can control or modify the default functionality of the oracle forms.
17 What is the use of place holder column?
A placeholder column is used to hold calculated values at a specified place rather than allowing is to appear in the actual row where it has to appear.
18 What is the use of image_zoom built-in?
To manipulate images in image items.
19 What is the use of hidden column?
A hidden column is used to when a column has to embed into boilerplate text.
20 What is the use of break group?
A break group is used to display one record for one group ones. While multiple related records in other group can be displayed.
21 What is the remove on exit property?
For a modelless window, it determines whether oracle forms hides the window automatically when the operators navigates to an item in the another window.
22 What is the purpose of the product order option in the column property sheet?
To specify the order of individual group evaluation in a cross products.
23 What is the maximum no of chars the parameter can store?
The maximum no of chars the parameter can store is only valid for char parameters, which can be upto 64K. No parameters default to 23Bytes and Date parameter default to 7Bytes.
24 What is the main diff. bet. Reports 2.0 & Reports 2.5?
Report 2.5 is object oriented.
25 What is the frame & repeating frame?
A frame is a holder for a group of fields. A repeating frame is used to display a set of records when the no. of records that are to displayed is not known before.
26 What is the difference between OLE Server & Ole Container?
An Ole server application creates ole Objects that are embedded or linked in ole Containers ex. Ole servers are ms_word & ms_excel. OLE containers provide a place to store, display and manipulate objects that are created by ole server applications. Ex. oracle forms is an example of an ole Container.
27 What is the difference between object embedding & linking in Oracle forms?
In Oracle forms, Embedded objects become part of the form module, and linked objects are references from a form module to a linked source file.
28 What is the difference between boiler plat images and image items?
Boiler plate Images are static images (Either vector or bit map) that you import from the file system or database to use a graphical elements in your form, such as company logos and maps. Image items are special types of interface controls that store and display either vector or bitmap images. Like other items that store values, image items can be either base table items(items that relate directly to database columns) or control items. The definition of an image item is stored as part of the form module FMB and FMX files, but no image file is actually associated with an image item until the item is populate at run time.
29 What is the difference between $$DATE$$ & $$DBDATE$$ $$DBDATE$$ retrieves the current database date $$date$$ retrieves the current operating system date.
30 What is the diff. when Flex mode is mode on and when it is off?
When flex mode is on, reports automatically resizes the parent when the child is resized.
31 What is the diff. when confine mode is on and when it is off?
When confine mode is on, an object cannot be moved outside its parent in the layout.
32 What is the diff. bet. setting up of parameters in reports 2.0 reports 2.5?
LOVs can be attached to parameters in the reports 2.5 parameter form.
33 What is the advantage of the library?
Libraries provide a convenient means of storing client-side program units and sharing them among multiple applications. Once you create a library, you can attach it to any other form, menu, or library modules. When you can call library program units from triggers menu items commands and user named routine, you write in the modules to which you have attach the library. When a library attaches another library, program units in the first library can reference program units in the attached library. Library support dynamic loading-that is library program units are loaded into an application only when needed. This can significantly reduce the run-time memory requirements of applications.
34 What is term?
The term is terminal definition file that describes the terminal form which you are using r20run.
35 What is system.coordination_operation?
It represents the coordination causing event that occur on the master block in master-detail relation.
36 What is synchronize?
It is a terminal screen with the internal state of the form. It updates the screen display to reflect the information that oracle forms has in its internal representation of the screen.
37 What is strip sources generate options?
Removes the source code from the library file and generates a library files that contains only pcode. The resulting file can be used for final deployment, but can not be subsequently edited in the designer. ex. f45gen module=old_lib.pll userid=scott/tiger strip_source YES output_file
38 What is relation between the window and canvas views?
Canvas views are the back ground objects on which you place the interface items (Text items), check boxes, radio groups etc.,) and boilerplate objects (boxes, lines, images etc.,) that operators interact with us they run your form . Each canvas views displayed in a window.
39 What is pop list?
The pop list style list item appears initially as a single field (similar to a text item field). When the operator selects the list icon, a list of available choices appears.
40 What is new_form built-in?
When one form invokes another form by executing new_form oracle form exits the first form and releases its memory before loading the new form calling new form completely replace the first with the second. If there are changes pending in the first form, the operator will be prompted to save them before the new form is loaded.
41 What is lexical reference? How can it be created?
Lexical reference is place_holder for text that can be embedded in a sql statements. A lexical reference can be created using & before the column or parameter name.
42 What is forms_DDL?
Issues dynamic Sql statements at run time, including server side pl/SQl and DDL
43 What is difference between open_form and call_form?
when one form invokes another form by executing open_form the first form remains displayed, and operators can navigate between the forms as desired. when one form invokes another form by executing call_form, the called form is modal with respect to the calling form. That is, any windows that belong to the calling form are disabled, and operators cannot navigate to them until they first exit the called form.
44 What is bind reference and how can it be created?
Bind reference are used to replace the single value in sql, pl/sql statements a bind reference can be created using a (:) before a column or a parameter name.
45 What is an user exit used for?
A way in which to pass control (and possibly arguments ) form Oracle report to another Oracle products of 3 GL and then return control ( and ) back to Oracle reports.
46 What is an OLE?
Object Linking & Embedding provides you with the capability to integrate objects from many Ms-Windows applications into a single compound document creating integrated applications enables you to use the features form .
47 What is an object group?
An object group is a container for a group of objects; you define an object group when you want to package related objects, so that you copy or reference them in other modules.
48 What is an anchoring object & what is its use?
An anchoring object is a print condition object which used to explicitly or implicitly anchor other objects to itself.
49 What is a User_exit?
Calls the user exit named in the user_exit_string. Invokes a 3Gl program by name which has been properly linked into your current oracle forms executable.
50 What is a timer?
Timer is an "internal time clock" that you can programmatically create to perform an action each time the timer expires.
51 What is a Text_io Package?
It allows you to read and write information to a file in the file system.
52 What is a text list?
The text list style list item appears as a rectangular box which displays the fixed number of values. When the text list contains values that can not be displayed, a vertical scroll bar appears, allowing the operator to view and select undisplayed values.
53 What is a property clause?
A property clause is a named object that contains a list of properties and their settings. Once you create a property clause you can base other object on it. An object based on a property can inherit the setting of any property in the clause that makes sense for that object.
54 What is a physical page ? & What is a logical page ?
A physical page is a size of a page. That is output by the printer. The logical page is the size of one page of the actual report as seen in the Previewer.
55 What is a library?
A library is a collection of subprograms including user named procedures, functions and packages.
56 What is a difference between pre-select and pre-query?
Fires during the execute query and count query processing after oracle forms constructs the select statement to be issued, but before the statement is actually issued. The pre-query trigger fires just before oracle forms issues the select statement to the database after the operator as define the example records by entering the query criteria in enter query mode. Pre-query trigger fires before pre-select trigger.
57 What is a combo box?
A combo box style list item combines the features found in list and text item. Unlike the pop list or the text list style list items, the combo box style list item will both display fixed values and accept one operator entered value.
58 What does the term panel refer to with regard to pages?
A panel is the no. of physical pages needed to print one logical page.
59 What are visual attributes?
Visual attributes are the font, color, pattern proprieties that you set for form and menu objects that appear in your application interface.
60 What are three panes that appear in the run time pl/sql interpreter?
1.Source pane. 2. interpreter pane. 3. Navigator pane.
Regards
B RANGARAJAN -
OCCI for Oracle 9i and MS Visual Studio 2005
Hello.
Where do I get OCCI *.lib and *.dll files for Oracle 9i and MS Visual Studio 2005 (VC 8)?
Roman Perepelitsa.I was able to use MS Visual Studio 2005 and OCCi classes. There is a catch though, I was not able to use the debug library dll as it will crash. So I was not able to debug any code using the VS debugger, instead, I use the old and lengthy process: insert printf statements.
Jeff
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