Clean Java Code No SQL
Has anyone concidered putting all SQL outside the java source code. A properties file seems rather limited so why not xml?
My goal for posting this topic is to have the JDBC community provide input and suggestions for the given scenario.
A java app performs a certain task involving a DB the application is ported to another environment and the DB changes and the SQL for the action changes.
How would you define the SQL outside of the code and how would the java code interpret it, including SQL that is dynamically build using class properties or return values from class methods.
Thanks for reading this,
Phil
upsidedown7 said
in other words, in about 15 meta data tables,
you enter your logical data model,
and click which field(s) to search on, and with is
editable, the user, and user groups, and it
builds the application for you.And if one really wants to get away from the advantages of using a database one can use a OO database. Supposedly POET allows one to use any backend database (or at least Oracle and MS SQL Server.) So one doesn't even need to deal with tables or fields. It is all just objects.
It is always helpful to actually code a database from scratch. Doing so makes it obvious that a database needs to keep track of tables, and table names, and fields and field names and field types, etc. That is all 'meta-data'.
It makes it more obvious that creating meta data is just duplicating what a database already does.
And once one starts using a database to store meta-data and to store data in a form that is not consistent with the database model, one looses all advantages associated with a database. Like speed. Like seperation of the data model from the implementation model. Like allowing for different data striping models, archiving models and a slew of other useful tools that have come from 50 years of database technology.
And then there is migration. Add one field to your model for version 2 and now you have load the entire database in to memory, restructure the data model, and then lay that data back down. A chore that takes a couple of minutes or less in SQL using a relational layout can require a dedicate programmer several weeks to program and can take 12 hours to run on a client side only system (and be impossible on a server side system.)
Have you ever wondered why OO databases have not taken over the world even though they have been around for more than 10 years. Java didn't even exist when the first OO databases were already in the 2nd generation. And yet there is almost no market for them.
Consider how many languages, and process control models have been implemented and discarded in the last 50 years. And yet the relational model is stronger than ever. There has to be a reason.
i have moved all my users to using only
UPPERCASE data. since i have a rule of
no stored proceedures and triggers in my db's.And that is a good thing?
What does that have to do with stored procs?
using this, we were able to port a single application
to SQL Server 7, DB anywhere, and Oracle 8i in
4 days. the application had 121 tables. we had
a slight problem with dates, but we hammered that
out.The vast majority of applications will never use a different database. When they do it will be a complete switch.
Will your method work with 8000 tables (as someone suggested on this forum that they were running?)
At one company I worked for a single table contained something like 100 million rows (actually for performance reasons we had to break it into 3 tables as archived by date.)
Will your method work with 100 million rows? That database was 250 gigs and was growing at a rate of 400 meg a day. And they were planing on doubling that rate (and one estimate put it up to 10 times.) How long would it take to store 400,000 rows, every day, using your method? How long would it take to do the accumlation reports that could easily touch 30 million records?
This isn't to say that your solution isn't correct for your application. If the fields (not the data but the fields) change constantly day to day and your users can get by with the other constraints you have made then it is a good solution.
But as a general solution I would guess it has some serious flaws. And I for one would never want to handle the migration issue.
Similar Messages
-
In a very peculiar condition the following code gives ora-01858(a non-numeric character was found where a numeric was expected) in one environment whereas it doesnt give in other environment.
In Environment 1
DEBUG - %%%%%%%% sbSQLDetailsMbrLp==select TB_TRS_LP.MKT_BID_RATE, PUBLISH_DT from TB_TRS_LP where TB_TRS_LP.SWIFT_CCY_CODE='HKD' and TB_TRS_LP.TENOR='O/N' and TO_DATE(TB_TRS_LP.PUBLISH_DT,'dd/MM/YYYY hh:mi:ss AM') <= TO_DATE('', 'dd/MM/YYYY hh:mi:ss AM') AND BKG_CODE='SIN' ORDER BY PUBLISH_DT DESC
ERROR - Exception: java.sql.SQLException: ORA-01858: a non-numeric character was found where a numeric was expected
ERROR - Exception: com.pbg.eplatform.exception.CDBException: Problem occured in DAO(CShowCustomerInterestRateDAO) due to SQLException!
Exception Raised - ORA-01858: a non-numeric character was found where a numeric was expected
In Environment 2 this goes perfectly fine. We are using Weblogic JDBC. If we execute the same query outside java code, the sql does nt throw any errors.
Any known issues or anybody who have come across this problem. please throw some light.
The oracle versions between environment 1 and 2 are as follows.
In Environment 1
SQL> select * from v$version;
BANNER
Oracle8i Enterprise Edition Release 8.1.7.2.0 - Production
PL/SQL Release 8.1.7.2.0 - Production
CORE 8.1.7.0.0 Production
TNS for Solaris: Version 8.1.7.2.0 - Production
NLSRTL Version 3.4.1.0.0 - Production
SQL>
In Environment 2
SQL> select * from v$version;
BANNER
Oracle8i Enterprise Edition Release 8.1.7.0.0 - Production
PL/SQL Release 8.1.7.0.0 - Production
CORE 8.1.7.0.0 Production
TNS for 32-bit Windows: Version 8.1.7.0.0 - Production
NLSRTL Version 3.4.1.0.0 - Production
SQL>The answer is to extract the EXE into a temp directory, execute it, and delete it when you're done. For example:
//This is the path *inside* the JAR file!
InputStream in = getClass().getResourceAsStream("/resources/myprog.exe");
OutputStream out = new FileOutputStream("myprog.exe");
File file = new File("myprog.exe");
int data;
while((data = in.read()) >= 0) out.write(data);
in.close();
out.close();
//Execute the EXE here using java.lang.Runtime.exec()
if(file.exists()) file.delete();
... -
Error: ORA-03113 while executing complex java code from Oracle PL/SQL
Hi,
I am trying to execute a complex java code from Oracle PL/SQL. The classes were resolved successfully. But in the middle of execution, I am getting the following error:
ERROR:
ORA-03114: not connected to ORACLE
begin
ERROR at line 1:
ORA-03113: end-of-file on communication channel
Process ID: 13685
Session ID: 21 Serial number: 20
Is there a way to debug the Java classes loaded into oracle? Or is there any utility to find out why the connection was lost?
Regards,
SaravanaHi Saravana:
You could use simply System.out.println(..) at your Java code and see the output at the .trc files generated for your Oracle session.
Or better than this adding Java Util Logging messages at your code, to see how to use JUL API at the OJVM please see this blog post [Using JUL API inside the OJVM|http://marceloochoa.blogspot.com/2007/11/getting-logging-entering-exiting-and.html].
Best regards, Marcelo.
PD: ora-0600 generally are associated with RDBMS bugs, but these bugs can be bypassed by replacing the code which throws the exception by other with a workaround. -
Query using the SQL 'go' command on a JAVA code
Hi,
I am trying to create a new database on MS SQL and at the same time verify whether the data base exist already and then add a new table. The query statement works well on the query windows on MS SQL, but when the query is place using a JAVA code it gives the following error:
java.sql.SQLException: [Microsoft][ODBC SQL Server Driver][SQL Server]Incorrect syntax near 'go'.
java.sql.SQLException: [Microsoft][ODBC SQL Server Driver][SQL Server]Incorrect syntax near 'go'.
at sun.jdbc.odbc.JdbcOdbc.createSQLException(Unknown Source)
at sun.jdbc.odbc.JdbcOdbc.standardError(Unknown Source)
at sun.jdbc.odbc.JdbcOdbc.SQLExecDirect(Unknown Source)
at sun.jdbc.odbc.JdbcOdbcStatement.execute(Unknown Source)
at sun.jdbc.odbc.JdbcOdbcStatement.executeQuery(Unknown Source)
at DataBaseCreator.main(DataBaseCreator.java:30)
I have to add that if I only query: "CREATE DATABASE NameOfDatabase" the new data base is created without a problem using JAVA, but when I try to use the following query, I got the error message.
"USE Master "
+ "IF EXISTS (SELECT * FROM SysDatabases WHERE NAME='DatesTemps') "
+ " DROP DATABASE DatesTemps"
+ " go "
+ " CREATE DATABASE DatesTemps22 "
+ " go"
+ " USE DatesTemps "
+ " CREATE TABLE Fable ( "
+ " FableID INT NOT NULL CONSTRAINT FablePK PRIMARY KEY NONCLUSTERED, "
+ " Title VARCHAR(50) NOT NULL, "
+ " Moral VARCHAR(100) NOT NULL, "
+ " FableText VARCHAR(1536) NOT NULL, "
+ " BlobType CHAR(3) NULL DEFAULT 'doc', "
+ " Blob IMAGE NULL DEFAULT NULL )"
If it is useful my complete code is the following, I appreciate in advance your comments.
import java.sql.Connection;
import java.sql.Statement;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.Calendar;
import java.util.GregorianCalendar;
public class DataBaseCreator {
public static void main (String[] args)
Connection Time =null;
Statement stmt = null;
String data = "jdbc:odbc:DataBaseCreation";
try
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Time= DriverManager.getConnection(data,"","");
stmt = Time.createStatement();
//String query;
//java.sql.Timestamp ts1 = new java.sql.Timestamp(((3*60)+58)*60*1000);
// System.out.println(ts1 + " This is a Time Stamp");
ResultSet rec = stmt.executeQuery(
"USE Master "
+ "IF EXISTS (SELECT * FROM SysDatabases WHERE NAME='DatesTemps') "
+ " DROP DATABASE DatesTemps"
+ " go "
+ " CREATE DATABASE DatesTemps22 "
+ " go"
+ " USE DatesTemps "
+ " CREATE TABLE Fable ( "
+ " FableID INT NOT NULL CONSTRAINT FablePK PRIMARY KEY NONCLUSTERED, "
+ " Title VARCHAR(50) NOT NULL, "
+ " Moral VARCHAR(100) NOT NULL, "
+ " FableText VARCHAR(1536) NOT NULL, "
+ " BlobType CHAR(3) NULL DEFAULT 'doc', "
+ " Blob IMAGE NULL DEFAULT NULL )"
catch( Exception e )
System.err.println( e );
e.printStackTrace();
finally
try
stmt.close();
Time.close();
catch( Exception e )
System.err.println( e );
}Ok, first of all thanks for your answer, now what I want to do is the following:
1) I need to input ((retrieve) every minute some data (Date and Temperature), that I will get from and external device, this is not part of this code.
2) I want to store that data (Date and Temp) on a data base, here where I need the command to create the data base and to verify whether that data base already exists. In case it has already been created then create new table(s) on it. If it doesn't exist then create and then create new tables.
3) Each Day (at yyyy mm dd 00:00:00:000 will create a new table, and the name of this table will be yyyymmdd.
4) Then every minute the java code will retrieve the data and add it to the table in the data base.
5) That will be a close loop that will be running until the user interrupt it.
I haven't make the communication code yet, in order to test my code I was thinking to retrieve the data from another data base. This would be just to verify that the JAVA sequence is able to retrieve the data every minute and create new data base and tables.
For the record I am able to send the queries and retrieve information from SQL running the code in eclipse, that will cover your first observation.
I am quite new in the forum I am sorry I didn't get the use of code tags.
Sorry again as I said I am quite new on this, what's a DDL statement.
Thanks. -
How to re-issue an SQL query in java code in deadlock situation ?
Hi all..
I have a java application (in Struts) which is running on JBoss 4.0.1 server. The database is MySql 6.0. It is an
application made to be used among multiusers. The background operating system is Windows Vista.
Now a days i am facing a peculiar problem due to which the further things go wrong. I am getting following error :
com.mysql.jdbc.exceptions.MySQLTransactionRollbackException: Deadlock found when trying to get lock; try restarting transaction
I searched over forums and i got response as restart the transaction in deadlock.
In my java code it is a delete query where i get such exception when multiple users are accessing the application. What i tried for time being is as follows :
Statement stmt = null;
String temp = null;
Connection conn = null;
String sUserID =(String) session.getAttribute("username")
try
conn = DBConnection.getJndiConnection();
stmt = conn.createStatement();
temp = "Delete FROM temptable where Login ='"+sUserID+"'";
System.out.println("QUERY:"+temp);
int rowCount = stmt.executeUpdate(temp);
System.out.println("Rows affected in try ="+rowCount+" for user :"+sUserID);
// in catch i re-issue the delete query in deadlock..
catch (com.mysql.jdbc.exceptions.MySQLTransactionRollbackException ne)
System.out.println("Error ....Deadlock occured for user: "+sUserID);
ne.printStackTrace();
try
int rowCount = s.executeUpdate(temp);
System.out.println("Rows affected in catch ="+rowCount+" for user :"+sUserID);
catch (Exception e)
System.out.println("Exception again after restarting transaction..with user :"+sUserID);
e.printStackTrace();
(all necessary imports are present in code)
Here i am properly establishing the database connection with the help of other class DBConnection. As most of the forum insisted to re-issue the transaction, i have tried upto one level with above code. But still the problem is just partially solved.
How can i write my code so that every time if there is MySQLTransactionRollbackException , then the delete query should be re-issued again and again untill the transaction is complete.
Can i use GOTO statement ? or is it bad programming practice?
What are the other possible ways ??
Can someone please help in this regard ??
Thanks in advance..
Regards
PrasadHi all
i am new for these kind of databae transaction operation i am getting following error
/resetattendancedata.dqlMessage: Deadlock found when trying to get lock; Try restarting transaction, message from server: "Lock wait timeout exceeded; try restarting transaction" Cause: null Error Message: Deadlock found when trying to get lock; Try restarting transaction, message from server: "Lock wait timeout exceeded; try restarting transaction" Cause: null Error code: 1205 Error state: 41000 java.sql.SQLException: Deadlock found when trying to get lock; Try restarting transaction, message from server: "Lock wait timeout exceeded; try restarting transaction"
Here is my code i have written
if(movements.equalsIgnoreCase("ON"))
System.out.println("Movement");
if(submovements.equalsIgnoreCase("statusonly"))
query="";
query="UPDATE TRNMOVEMENT SET PROCESSED='N',STATUSPUT='N',ATTDATE=NULL,TIMEDIFF='' "
+"WHERE ATTDATE BETWEEN '"datefrom1"' AND '"dateto"' AND EMPID IN "
+"(SELECT SYSEMPID "
+"FROM (((MSTPERSONALDETAILS PD LEFT JOIN MSTCATEGORY CAT ON PD.CATEGCODE=CAT.SYSCATEGCODE)"
+"LEFT JOIN MSTUNITDETAILS U ON PD.UNITCODE=U.SYSUNITCODE) "
+"LEFT JOIN MSTDESIGNATION DES ON PD.DESIGCODE=DES.SYSDESIGCODE) "
+"LEFT JOIN MSTDEPARTMENT DEP ON PD.DEPTCODE=DEP.SYSDEPTCODE "strFltrString" ) ";
leaveStmt.executeUpdate(query);
leaveStmt.executeUpdate("commit");
else if(submovements.equalsIgnoreCase("flagstatus"))
query="";
query="UPDATE TRNMOVEMENT SET PROCESSED='N',STATUSPUT='N',ATTDATE=NULL,FLAG='',TIMEDIFF='',BREAK='N'WHERE ATTDATE BETWEEN '"datefrom1"' AND '"dateto"' AND EMPID IN (SELECT SYSEMPID FROM(((MSTPERSONALDETAILS PD LEFT JOIN MSTCATEGORY CAT ON PD.CATEGCODE=CAT.SYSCATEGCODE) LEFT JOIN MSTUNITDETAILS U ON PD.UNITCODE=U.SYSUNITCODE) LEFT JOIN MSTDESIGNATION DES ON PD.DESIGCODE=DES.SYSDESIGCODE) LEFT JOIN MSTDEPARTMENT DEP ON PD.DEPTCODE=DEP.SYSDEPTCODE WHERE EMPID IS NOT NULL "strFltrString" ) ";
leaveStmt.executeUpdate(query);
synchronized(leaveStmt)
//leaveStmt1.executeUpdate("set TRANSACTION ISOLATION LEVEL REPEATABLE READ"); // setting transaction level using SQL
// leaveStmt1.executeUpdate("start transaction"); // Starting a transaction using SQL
query1="DELETE FROM TRNDAILYATTENDANCE WHERE ATTDATE BETWEEN '"datefrom1"' AND '"dateto"' AND EMPID IN (SELECT SYSEMPID FROM (((MSTPERSONALDETAILS PD "
+"LEFT JOIN MSTCATEGORY CAT ON PD.CATEGCODE=CAT.SYSCATEGCODE) LEFT JOIN MSTUNITDETAILS U ON PD.UNITCODE=U.SYSUNITCODE) LEFT JOIN MSTDESIGNATION DES ON PD.DESIGCODE = DES.SYSDESIGCODE )LEFT JOIN MSTDEPARTMENT DEP ON PD.DEPTCODE=DEP.SYSDEPTCODE WHERE EMPID IS NOT NULL "strFltrString" )";
//leaveStmt.addBatch(query1);
leaveStmt.executeUpdate(query1);
synchronized(leaveStmt)
query2="UPDATE TRNLEAVEAPPLICATION SET TAKENTOATT='N' WHERE '"datefrom1"' BETWEEN FROMDATE AND "
+"TODATE AND '"dateto"' BETWEEN FROMDATE AND TODATE AND EMPID IN (SELECT SYSEMPID FROM (((MSTPERSONALDETAILS PD LEFT JOIN MSTCATEGORY CAT ON "
+"PD.CATEGCODE=CAT.SYSCATEGCODE) LEFT JOIN MSTUNITDETAILS U ON PD.UNITCODE=U.SYSUNITCODE) LEFT JOIN "
+"MSTDESIGNATION DES ON PD.DESIGCODE=DES.SYSDESIGCODE) LEFT JOIN MSTDEPARTMENT DEP ON PD.DEPTCODE=DEP.SYSDEPTCODE WHERE EMPID IS NOT NULL "+strFltrString +") ";
//leaveStmt.addBatch(query2);
//leaveStmt.executeBatch();
leaveStmt.executeUpdate(query2);
//} // end of for loop
else
leaveStmt.executeUpdate("commit");
Please Solve my problem for this error thanks in advance........ -
SQL in JSP - do I use JAVA code in % ... % or SQL Tag Library ??
I have a small web app that makes needs to make about 12 SQL queries in a JSP and am trying to figure out what is the best way to do this
I had initially coded this using plain JAVA code in the JSP as follows :-
<%
Connection conn = null;
Statement st = null;
ResultSet rs = null;
try {
st = conn.createStatement();
rs = st.executeQuery("select .........");
%>
But then I came across the SQL Tag Library in an article and wonder if this is more efficient code?
If so does anyone have a pointer to a good intro to these tags as they look complicated (I only am doing queries on the SQL database, no inserts or updates)Sometimes you've gotta do what you've gotta do.
My rule is "no scriptlets".
If you MUST access a database from a JSP, the only right way to do it is to use JSTL <sql> tags.
% -
Execute PL/SQL block with named binds from within java code?
Hi guys,
Is there any good way to execute my PL/SQL code, for example
BEGIN :x := :x+1; END;
from my Java code? I need nothing complicated, just static code block with named binds.
I have tried the Oracle exetnded JDBC (setXXXbyName methods):
public static void main(String[] args){ try { Class.forName("oracle.jdbc.driver.OracleConnection"); Connection conn=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","user","password"); String SQL="begin :x:=:x+1; end;"; OracleCallableStatement stmt; stmt=(OracleCallableStatement)conn.prepareCall(SQL); stmt.setIntAtName("x", 5); stmt.registerOutParameter("x", Types.INTEGER); stmt.execute(); System.out.println(stmt.getInt("x")); } catch (Exception x) { x.printStackTrace(); } }
And get the java.sql.SQLException: operation not allowed: Ordinal binding and Named binding cannot be combined!
Then i've tried SQLJ appoach:
public static void main(String[] args){ try { Class.forName("oracle.jdbc.driver.OracleConnection"); Connection conn=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","user","password"); Oracle.connect(conn); System.out.println("Connected!"); int x=3; #sql { BEGIN :x := :x+1; END; }; System.out.println("x=" + x); } catch (Exception x) { x.printStackTrace(); } }
And x=3 had retuned... Although 4 expected.
Then, I've set parameter sqlj.bind-by-identifier=true
And result is another exception! java.sql.SQLException: Missing IN or OUT parameter at index:: 2
Can you please mark my mistakes/point to correct solution?
Thanks in advance,
AlexeyFound another solution, this time working at least...
public void testPLSQL() {
String dynamicSQL=
"declare\n" +
" v_CursorID INTEGER;\n" +
" v_BlockStr VARCHAR2(500);\n" +
" v_Dummy INTEGER;\n" +
" v_x String(18);\n" +
"BEGIN\n" +
" v_CursorID := DBMS_SQL.OPEN_CURSOR;\n" +
" v_BlockStr :=?;" +
" DBMS_SQL.PARSE(v_CursorID, v_BlockStr, DBMS_SQL.V7);\n" +
" v_x:=?;"+
" DBMS_SQL.BIND_VARIABLE(v_CursorID, ':x', v_x,18);\n" +
" v_Dummy := DBMS_SQL.EXECUTE(v_CursorID);\n" +
" DBMS_SQL.VARIABLE_VALUE(v_CursorID, ':x', v_x);\n" +
" DBMS_SQL.CLOSE_CURSOR(v_CursorID);\n" +
" ?:=v_x;"+
" COMMIT;\n" +
"EXCEPTION\n" +
" WHEN OTHERS THEN\n" +
" DBMS_SQL.CLOSE_CURSOR(v_CursorID);\n" +
" RAISE;\n" +
"END DynamicPLSQL;";
try {
Class.forName("oracle.jdbc.driver.OracleConnection");
Connection conn=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","user", "password");
System.out.println("Profit");
String SQL="begin :x:=:x+1; end;";
OracleCallableStatement stmt;
stmt=(OracleCallableStatement)conn.prepareCall(dynamicSQL);
stmt.setString(1, SQL);
int x=3;
stmt.setInt(2, x);
stmt.registerOutParameter(3, Types.INTEGER);
stmt.execute();
x=stmt.getInt(3);
System.out.println(x);
assertEquals(4, x);
} catch (Exception ex) {
ex.printStackTrace();
assertTrue(false);
}Now the only thing I need is to code some kind of preprocessor of SQL block, to prepare the dynamicSQL lair for SQL critter...
Please please please show me something less complicated! :8} -
Convert SQL statements to JAVA Code ?
Using SQL queries Can I convert SQL statements to JAVA Code ?
Edited by: user11238895 on Jun 7, 2009 10:54 PM
Edited by: user11238895 on Jun 7, 2009 11:12 PMMe very new to Oracle.
can we convert SQL Queries to JAVA Code using simple built in SQL queries ?
Which SWISS SQL Tool does [Converting SQL Queries to JAVA Code] -
How to isolate the Sql Statement from Java Code
Hi
I Need to know that can we segregate the Sql Statements and convert them to Stored Procedures so as to isolate the Sql statements from Java Code.
So i have one static web page which uses four select Statements so what i want is to create a stored procedure encapsulating these queries. So that the Java Web Developer will simply call the Stored Procedure instead of using four different SQL Statements.
Suppose the developer has these four Statements
Select ename,empno,sal,job from emp;
select empno,ename,mgr from emp;
select deptno,dname from dept;
select emp.ename,emp.empno,emp.deptno,dept,dname fromemp,dept;
So can i encapsulate these four Sql Statements in one Procedure and the Web developer can call the Store procedure and dont need to write the Sql Statements in his code.
Can Anybody guide me how to write this Stored type of Store procedure.
Thankshttp://www.google.com/search?q=java+windows+registry
Next time, search yourself. It might be beyond your belief, but you're really, really not the first person to wonder about this. -
Is it possible to remove Locks in SQL server 200 using java code...???
Hi floks,
I had i trickey situation in which my application is creating the locks over the tables in the
DB(SQL server 2000) . Iam using Struts frame work 1.1 + jsp in our application.
Iam bit worried wether the locks can be removed with the java code which suits the Struts
framework...
Please help me with proper code snippet to over come the situation.
Thanks in anticipation
Shiviam looking to make a query in such a way that it can be triggered with
java code whish removes all the locks
is it possible...?
i tried the nolock situation even i cant get the situations
and the query where it is getting locked as our application is big enough with
numerous number of queries -
SQL Fails when a division is included in query (in Java Code)
Not sure this is the correct Forum to as this:
Running Oracle 10g R2 on XP/Vista
I have a query that contains a division operation (y.value as x.value/z.value) runs in SQLPlus and The NetBeans 6.5.1 Query Editor OK but when I insert it into Java (1.6) code (abc.java) it fails.
I tried to escape the "\" operator <whatever> (\/) and that dows not work either.
Can someone help me with this
Thanks
J.Thanks ... You got me on that one... should havr provided the query upfront..
However, I thought it was more likely that there was something one always has to do to get "functions" to run inside a query inside Java code
Here's the query plus some code
Pls note the: round(((x.VALUE/226672)*100),2) as Percentage
r_dayEBOMDataProvider.setCachedRowSet((javax.sql.rowset.CachedRowSet) getValue("#{Page1.r_dayEBOMRowSet}"));
r_dayEBOMRowSet.setDataSourceName("java:comp/env/jdbc/ABC_Oracle");
r_dayEBOMRowSet.setCommand("WITH vals AS (SELECT date_day, value, site_datatype_id FROM r_day WHERE site_datatype_id = '1234' AND date_day > date_day - 367) SELECT x.date_day,x.VALUE,y.date_day,y.VALUE AS valuem1w,z.date_day,z.VALUE AS valuem1y,round(((x.VALUE/226672)*100),2) as Percentage FROM vals x, vals y, vals z WHERE y.date_day(+) = x.date_day - 7 AND z.date_day(+) = ADD_MONTHS (x.date_day,-12) AND y.site_datatype_id(+) = x.site_datatype_id AND z.site_datatype_id(+) = x.site_datatype_id AND x.date_day = TO_DATE('16-Feb-2010','DD-MON-YYYY')");
r_dayEBOMRowSet.setTableName("R_DAY");
Again, this works fine inside of SqlPlus and NetBeans Query Editor
not in Java code thought.
Thanks
J. -
How can i return object from oracle in my java code using pl/sql procedure?
How can i return object from oracle in my java code using pl/sql procedure?
And How can i returned varios rows fron a pl/sql store procedure
please send me a example....
Thank you
nullyes, i do
But i can't run this examples...
my problem is that i want recive a object from a PL/SQL
//procedure callObject(miObj out MyObject)
in my java code
public static EmployeeObj callObject(Connection lv_con,
String pv_idEmp)
EmployeeObj ret = new EmployeeObj();
try
CallableStatement cstmt =
lv_con.prepareCall("{call admin.callObject(?)}");
cstmt.registerOutParameter(1, OracleTypes.STRUCT); // line ocurr wrong
//registerOutParameter(int parameterIndex, int sqlType,String sql_name)
cstmt.execute();
ret = (EmployeeObj) cstmt.getObject(1);
}//try
catch (SQLException ex)
System.out.println("error SQL");
System.out.println ("\n*** SQLException caught ***\n");
while (ex != null)
System.out.println ("SQLState: " + ex.getSQLState ());
System.out.println ("Message: " + ex.getMessage ());
System.out.println ("Vendor: " + ex.getErrorCode ());
ex = ex.getNextException ();
System.out.println ("");
catch (java.lang.Exception ex)
System.out.println("error Lenguaje");
return ret;
Do you have any idea? -
How to pass the parameter values to the stored procedure from java code?
I have a stored procedure written in sqlplus as below:
create procedure spInsertCategory (propertyid number, category varchar2, create_user varchar2, create_date date) AS BEGIN Insert into property (propertyid, category,create_user,create_date) values (propertyid , category, create_user, create_date); END spInsertCategory;
I am trying to insert a new row into the database using the stored procedure.
I have called the above procedure in my java code as below:
CallableStatement sp = null;
sp = conn.prepareCall("{call spInsertCategory(?, ?, ?, ?)}");
How should I pass the values [propertyid, category, create_user, create_date) from java to the stored procedure?[i.e., parameters]
Kindly guide me as I am new to java..Java-Queries wrote:
I have a stored procedure written in sqlplus as below:FYI. sqlplus is a tool from Oracle that provides a user interface to the database. Although it has its own syntax what you posted is actually PL/SQL. -
Some java code returns a null resultset from 10.2.0.1 DB, but works w/ 9.2
I am a Java noob guys, but we have java code the calls an Oracle Function. This code is unchanged from what successfully runs against an Oracle 9.2 database returning, in this case, one row from the database. A ref cursor is used. When the same Java code calls the same ref cursor function from a 10.2.0.1 database, a null resultset occurs. The function correctly returns a single row when executed by the same database user via sql-plus. So it must be a java thing. Does the jdbc driver need to be upgraded to correctly run against a 10.2 database? And is this null resultset type of anomaly a potential result of having a wrong version of ojdbc14.jar? Nothing else has changed except pointing the code to the same package and tables in a 10.2 database.
Thanks in advance for your comments.
Phil McDermottI realize now that this is the wrong forum to post in, but I was linked here from a google search on the issue.
I downloaded the 10.2.0.1 ojdbc14.jar from oracle, but the problem persists.
yeesh! now what? -
Passing String Array from Java to PL/SQL
Hi,
We are having couple of packages which have been written in PL/SQL . I would like to know how i can send arrays as input parameters from Java to any stored proc in Oracle. I am having Oracle 8i as the DB and am using Websphere RSA for deployment purposes.
please find below Java , PL/SQL code and exception
PL/SQL Code :
PACKAGE PKG_SURCHARGE
IS
TYPE commodity_key IS TABLE OF VARCHAR2(500) INDEX BY BINARY_INTEGER;
PROCEDURE RETRIEVE_CHARGES
in_Commodity_tab IN commodity_key,
IS
BEGIN
dbms_output.put_line('in_Commodity_tab(' || '0' || ') : ' || in_Commodity_tab(0) );
Java Code :
CallableStatement cstmt=null;
Connection conn=null;
try{
conn=getConnection();
System.out.println("++++++connected");
String sqlStr = "{call Pkg_Surcharge.RETRIEVE_CHARGES(?) }";
cstmt = conn.prepareCall(sqlStr );
//1.
String[] javaArray={"20081117","20081117"};
ArrayDescriptor dateDescripter = ArrayDescriptor.createDescriptor( "commodity_key", conn );
oracle.sql.ARRAY dateArray = new oracle.sql.ARRAY(dateDescripter, conn, javaArray);
System.out.println("++++++registered-1");
Catch (Exception e){
e.printStackTrace();
Exception Occured:
java.sql.SQLException: Invalid Pattern Name <Schema Name>.commodity_key
Appreciate your help in this regard
Thanks
Srini
Edited by: [email protected] on Nov 25, 2008 4:55 AMAvi is correct. You must create a varray or nested table instead of using a PL/SQL index-by table.
SQL> create type commodity_key as varray(#) of varchar2(500);
or
SQL> create type commodity_key as table of varchar2(500);
Use the varray if you know the number of items in the array. Otherwise, use the nested table.
Maybe you are looking for
-
I need help on how to transfer my old iPad to my husband
-
HT4108 Problem with charging iPhone 5 using Digital AV adapter.
When using the Digital AV adapter, my iPhone 5 recognizes the adapter, shows the charging symbol briefly and then it disappears and the phone does not charge. The video mirror through HDMI works without issue. Both the charge cable and Digital AV a
-
Error in RFC Receiver Adapter: functiontemplate from repository was null
Hi Friends, i am working on JDBC -> RFC Scenario, JDBC Sender Adapter is working fine, but RFC Receiver Adapter is throwing this error message... can some one help me to solve this issue... Message processing failed. Cause: com.sap.aii.af.ra.ms.api.R
-
Run time column names as parameters
Hi SDN, I am trying to use a FORM/ENDFORM which can work for many internal tables in my project except that a couple of field (table columns) names differ. In other words, just for two assignment statements I may have to repeat rest of the code, unle
-
Where is " SAVE ALL " in Preview?
In M. Lion, " Save All " in Preview disappeared, so how to use this function after editing a pack of photo???