Taking user input in a PL/SQL block

Can someone tell me if it is possible to to take user input from within a PL/SQL loop? I mean I want that for each iteration in the loop, the program first take user input, and then based on that input, it perform specific operations. Then it repeats this process for each subsequent iteration of loop.
If it is not possible in PL/SQL, is there any other alternative?
Thanks.

> I'm afraid I have no idea how to get the server to ask questions of the user,
especially when it essentially operates in a kind of batch mode.
Yep. To expand a tad on what Hans mentioned here.
To accept input, the process needs to be able to read from this input device. Let's make it a keyboard. The PL/SQL process needs to read keyboard input.
The keyboard is attached to a PC 1000km away in a branch office. The Oracle server process, running on a server in the data centre, executes this PL/SQL code.
So now this PL/SQL process has to automagically hack its way across the network. It needs to remove the keyboard plug from that client PC. It somehow must get that keyboard rewired, across that 1000km, into the server platform at the data centre. And only then can the Oracle server process running that PL/SQL code read from that keyboard input device and accept user input.
It is important, when developing in Oracle, to grasp just what client-server is and how it works. And not to confuse something like a SQL*Plus Client Process (submitting PL/SQL code) with the Oracle Server Process (parsing and executing that submitted PL/SQL code).

Similar Messages

A question about input values inside PL/SQL block

Dear all,
I would appreciate if you could kindly help me with this question.
Consider the following code.
DECLARE
myvar1 NUMBER;
myvar2 NUMBER;
myvar3 NUMBER;
BEGIN
myvar1 := &1;
myvar2 := &2;
myvar3 := &3;
DBMS_OUTPUT.put_line('myvar1 = ' || myvar1);
DBMS_OUTPUT.put_line('myvar2 = ' || myvar2);
DBMS_OUTPUT.put_line('myvar3 = ' || myvar3);
END;
/This program reads three values as input and prints them. However, I noticed that if instead of writing
myvar1 := &1;
myvar2 := &2;
myvar3 := &3;I write
myvar1 := '&1';
myvar2 := '&2';
myvar3 := '&3';The program will have very same result. I would like to know whether there is a semantic difference between both syntax,
that is, is there any difference between for example &myvar1 and 'myvar1'?
Thanks in advance,
Dariyoosh

Try this
CREATE TABLE test_sem (x VARCHAR2(10), y NUMBER)
INSERT INTO test_sem VALUES ('A',1);
INSERT INTO test_sem VALUES ('B',1);
INSERT INTO test_sem VALUES ('C',1);
INSERT INTO test_sem VALUES ('D',1);
SELECT * FROM test_sem WHERE x='&1' --OK
SELECT * FROM test_sem WHERE x=&1 -- error not a valid number
SELECT * FROM test_sem WHERE y=&1 -- ok
SELECT * FROM test_sem WHERE y='&1' -- ok since numbers can be converted to strings'&1' is for characters &1 for numbers;
You can verify form above test case
Regards,
Bhushan

User input from pl/sql

How could I get user input from a pl/sql block?
Hope that somebody can help me.
thanx
Amelio.

There is a package DBMS_LOCK that has a SLEEP routine, which suspends the session for a given period of time (in seconds).
However, you can only pause the procedure and not accept user input into the procedure during the pause.
syntax: DBMS_LOCK.SLEEP(1) ;
I need only to run an 'pause' or something like that within a pl/sql block. Do you know if it's possible? Thanks.

Selecting user input from Select option into smart form

Hi,
when i use parameter then i wil show company code in smart-form output
but when i use select option then its throwing error parameter specified here is different
what should i do in this case i want to design a big select option screen for taking user input
REPORT ZMM.
TABLES BSEG.
DATA : V_FORMNAME TYPE TDSFNAME VALUE 'ZPUR_REG',
       V_FMNAME TYPE RS38L_FNAM.
*PARAMETERS SO_BUKRS TYPE BUKRS.
SELECT-OPTIONS : SO_BUKRS FOR BSEG-BUKRS.
DATA : Z_CONTROL TYPE SSFCTRLOP,      "Smart Forms: Control structure
        Z_OPTIONS TYPE SSFCOMPOP.      "SAP Smart Forms: Smart Composer (transfer) options.
MOVE 'X' TO : Z_control-no_dialog,        "SAP Smart Forms: General Indicator
               Z_options-tdnewid,          "New Spool Request (Print Parameters)
               z_control-PREVIEW.         "Print preview
MOVE 'LP01' TO Z_options-tddest.         "Spool: Output device
MOVE space TO Z_options-tdimmed.        "Print Immediately (Print Parameters).
MOVE 'PRINTER' TO Z_control-device.      "Output device
CALL FUNCTION 'SSF_FUNCTION_MODULE_NAME'
EXPORTING
    FORMNAME = V_FORMNAME
IMPORTING
    FM_NAME = V_FMNAME.
CALL FUNCTION V_FMNAME
EXPORTING
    CONTROL_PARAMETERS = Z_CONTROL
    OUTPUT_OPTIONS     = Z_OPTIONS
    USER_SETTINGS      = ''
    BUKRS              = SO_BUKRS.
pls help me in this regards.
ketan..

hi
thnx for your reply
can u pls elaborate in my code
now i changed code   BUKRS    = SO_BUKRS-low.
either i can give low or high but how to select from range
REPORT ZMM.
TABLES BSEG.
DATA : V_FORMNAME TYPE TDSFNAME VALUE 'ZPUR_REG',
       V_FMNAME TYPE RS38L_FNAM.
*PARAMETERS SO_BUKRS TYPE BUKRS.
SELECT-OPTIONS : SO_BUKRS FOR BSEG-BUKRS.
DATA : Z_CONTROL TYPE SSFCTRLOP,      "Smart Forms: Control structure
        Z_OPTIONS TYPE SSFCOMPOP.      "SAP Smart Forms: Smart Composer (transfer) options.
MOVE 'X' TO : Z_control-no_dialog,        "SAP Smart Forms: General Indicator
               Z_options-tdnewid,          "New Spool Request (Print Parameters)
               z_control-PREVIEW.         "Print preview
MOVE 'LP01' TO Z_options-tddest.         "Spool: Output device
MOVE space TO Z_options-tdimmed.        "Print Immediately (Print Parameters).
MOVE 'PRINTER' TO Z_control-device.      "Output device
CALL FUNCTION 'SSF_FUNCTION_MODULE_NAME'
EXPORTING
    FORMNAME = V_FORMNAME
IMPORTING
    FM_NAME = V_FMNAME.
CALL FUNCTION V_FMNAME
EXPORTING
    CONTROL_PARAMETERS = Z_CONTROL
    OUTPUT_OPTIONS     = Z_OPTIONS
    USER_SETTINGS      = ''
    BUKRS              = SO_BUKRS-low.
ketan..

Showing user input in a JFrame

i need to be able to take user-given values and display them in a JFrame. i'm testing the input of a sudoku puzzle. i have a sudokuComponent and a sudokuViewer.
i'm confused as to where to place my code that will do the process of taking user input (via Scanner class) and testing it for certain conditions.
i dont think figuring out the testing conditions should be hard, i'm just having trouble with getting the input read in correctly and a way of getting it displayed on the JFrame which displays the sudoku puzzle with the values so far.
i was given a tip that said i needed to use the method repaint() of JFrame to see the updates.
SUDOKUCOMPONENT
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.geom.Line2D;
import javax.swing.JPanel;
import javax.swing.JComponent;
import java.util.Scanner;
public class SudokuComponent extends JComponent
     public void paintComponent(Graphics g)
          //recover graphics2s
          Graphics2D g2 = (Graphics2D) g;
          //Construct the Sudoku square
          Rectangle box = new Rectangle(20, 20, 270, 270);
          g2.draw(box);
          g2.draw(new Line2D.Double(20, 110, 290, 110)); //horizontal
          g2.draw(new Line2D.Double(20, 200, 290, 200));
          g2.draw(new Line2D.Double(110, 20, 110, 290)); //vertical
          g2.draw(new Line2D.Double(200, 20, 200, 290));
}SUDOKUVIEWER
import javax.swing.JFrame;
import java.util.Scanner;
public class SudokuViewer
   public static void main(String[] args)
      JFrame frame = new JFrame();
      final int FRAME_WIDTH = 350;
      final int FRAME_HEIGHT = 350;
      frame.setSize(FRAME_WIDTH, FRAME_HEIGHT);
      frame.setTitle("Sudoku Viewer");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      SudokuComponent component = new SudokuComponent();
      frame.add(component);
      frame.setVisible(true);
}

I have improved your application to show how it can be programmed.
For more information you can see about
KeyListener:
http://java.sun.com/docs/books/tutorial/uiswing/events/keylistener.html
MouseListener:
http://java.sun.com/docs/books/tutorial/uiswing/events/mouselistener.html
and of course use repaint() when you want to update your component
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.geom.Line2D;
import java.util.LinkedList;
import java.util.List;
import javax.swing.JComponent;
public class SudokuComponent extends JComponent {
    SudokuElement currentElement = new SudokuElement();
    List<SudokuElement> elementList = new LinkedList<SudokuElement>();
    public SudokuComponent(){
        addMouseListener(new MyMouseListener());
        setFocusable(true);
        addKeyListener(new MyKeyListener());
    public void paintComponent(Graphics g) {
        //public void paint(Graphics g) {
        //recover graphics2s
        Graphics2D g2 = (Graphics2D) g;
        //Construct the Sudoku square
        Rectangle box = new Rectangle(20, 20, 270, 270);
        g2.draw(box);
        g2.draw(new Line2D.Double(20, 110, 290, 110)); //horizontal
        g2.draw(new Line2D.Double(20, 200, 290, 200));
        g2.draw(new Line2D.Double(110, 20, 110, 290)); //vertical
        g2.draw(new Line2D.Double(200, 20, 200, 290));
        // show place where user can type a digit
        g2.draw(new Line2D.Double(currentElement.x - 10, currentElement.y, currentElement.x + 10, currentElement.y));
        // show all typed digits
        for(SudokuElement elem : elementList ){
           g2.drawString(elem.digit + "", elem.x, elem.y);
    class SudokuElement {
        int digit;
        int x;
        int y;
        SudokuElement getCopy(){
            SudokuElement elem = new SudokuElement();
            elem.x = x;
            elem.y = y;
            elem.digit= digit;
            return elem;
    class MyMouseListener extends MouseAdapter {
        public void mouseClicked(MouseEvent e) {
            System.out.println("mouse clicked: x = " + e.getX() + " y = " + e.getY());
            currentElement.x = e.getX(); // It is better to use local coordinats 0 .. 9
            currentElement.y = e.getY();
            repaint();
    class MyKeyListener extends KeyAdapter {
        public void keyTyped(KeyEvent e) {
            char ch = e.getKeyChar();
            System.out.println("char typed= " + ch);
            if( Character.isDigit(ch) ){ // Filter only digits
                currentElement.digit = Character.digit(ch, 10);
                elementList.add(currentElement.getCopy());
                repaint();
}

Need an interactive "Prompting and receiving input mechanism " in PL/SQL

Can anyone suggest, possibility of an interactive "Prompting and receiving input mechanism " in PL/SQL blocks.
Thanks in advance.
Regards,
srini

Use client side tools with PL/SQL engine:
http://www.oracle.com/technology/documentation/forms.html

How to use Pl/sql block to edit check user input

Hi,
Please advise on PL/SQL Block code that could be used to Check User input from within a Loop and proceed conditionally based upon User Supplied compliant Input. Thanks in advance.

Hi,
yakub21 wrote:
You could use the ACCEPT to get user input and then assign the input to a variable that could then be verified.
I believe that anything is possible because we don't yet have proof that it is not!
I do have code that can accept user input. Is it PL/SQL code? Sybrand was clearly talking about PL/SQL:
sybrand_b wrote:
Pl/sql is for server side code, it is not a front end tool, and it is incapable of the functionality you describe.If you do have PL/SQL code that accepts user input, please post an example. A lot of people, including me, would be very interested.
Pass the user-input value to a variable and then assign that value to another variable from within a Declare of a PL/SQL Block.
The opportunity here is to figure a way to loop with user input until desired input is entered by the user before proceeding with the code. I'm using PL/SQL Block because I don't want the code to persist. I just want to run it as part of database configuration procedure. ThanksIt sounds like you're talking about SQL*Plus, which is a very poor tool for looping or branching.
It's possible, but it's not pretty. The following thread shows one way of looping in SQL*Plus:
Re: How to give the different values to runtime parameters in a loop?

Accepting user input and executing a PL/SQL block using it

Hi All,
I am working on a requirement wherein I have to accept values from the user for the various arguments to be supplied to a PL/SQL block and then execute it using these values. For now, I am using the following logic:
PROMPT Enter value for the Category
ACCEPT cCategory CHAR PROMPT 'Category:'
DECLARE
cCategry CHAR(1) := '&cCategory';
BEGIN
DBMS_OUTPUT.PUT_LINE('The value of the Category as entered by you is' || cCategory);
END;
PROMPT Press y if you want to proceed with the current values, or press n if you want to re-enter the values
ACCEPT cChoice CHAR Prompt 'Enter y or n:'
DECLARE
cCategry CHAR(1) := '&cCategory';
sErrorCd VARCHAR2(256);
sErrorDsc VARCHAR2(256);
BEGIN
IF '&cChoice' = 'y'
THEN
DBMS_OUTPUT.PUT_LINE('Starting with the process to execute the stored proc');
--- schema1.package1.sp1(cCategry, sErrorCd, sErrorDsc);
--- DBMS_OUTPUT.PUT_LINE('Error Code :' || sErrorCd);
--- DBMS_OUTPUT.PUT_LINE(' Error Description :' || sErrorDsc);
ELSIF '&cChoice' = 'n'
THEN
Now I want that the proc again start executing in the loop from the 1st line i.e. PROMPT Enter value for the Category. However i see that this is not possible to do that PROMPT statements and accepting user inputs execute only on the SQL prompt and not inside a PL/SQL block.
Is there an alternate method to establish this?
Thanks in advance.

Hi,
You can write a genric procedure to achive the desired output. Pass 'Y' or 'N' in the procedure.
Call that procedure in simple pl/sql block during runtime using substituton operator.
For ex
create or replace procedure p1(category_in in varchar2)
IS
BEGIN
if (category_in='Y')
then
prcdr1()
/** Write your logic here ***/
elsif(category_in='N') then
prcdr2()
/** write your logic here***/
end if;
exception
/***write the exception logic ***/
end p1;
Begin
p1('&cat');
end;Regards,
Achyut K
Edited by: Achyut K on Aug 6, 2010 5:20 AM

Accepting User input in SQL*Plus

I am writing a SQL script in SQL*Plus that accepts a value from the user and plugs that value into a variable that exist in several locations outside of the PL/SQL block.
I am able to do this, yet everytime this variable is encountered, the user is prompted for input. I would like to have the user prompted only once at the beginning and then use that value throughout. This seems like a simple task, yet I cannot get it to work.
Any help would be greatly appreciated.

You can use &&<variable_name> and it will define the variable and use it throughout the SQL code.

How to accept user inputs from sql script

I want to create Tablespace useing sql script , but the location of the data file I need accept from user . (to get the location of the data file ) .
How can I accept user input from pl/sql .
Example :
CREATE TABLESPACE TSPACE_INDIA LOGGING
     DATAFILE 'H:\ORACLE_DATA\FRSDB\TSPACE_INDI_D1_01.dbf'
     SIZE 500M AUTOEXTEND ON NEXT 1280K MAXSIZE UNLIMITED
     EXTENT MANAGEMENT LOCAL;here I need to accept location of the datafile from user ie : 'H:\ORACLE_DATA\FRSDB\TSPACE_INDI_D1_01.dbf'

Hi,
Whenenever you write dynamic SQL, put the SQL text into a variable. During development, display the variable instead of executing it. If it looks okay, then you can try executing it in addition to displaying it. When you're finished testing, then you can comment out or delete the display.
For example:
SET     SERVEROUTPUT     ON
DECLARE
    flocation     VARCHAR2 (300);
    sql_txt     VARCHAR2 (1000);
BEGIN
    SELECT '&Enter_The_Path'
    INTO    flocation
    FROM    dual;
    sql_txt := 'CREATE TABLESPACE SRC_TSPACE_INDIA LOGGING
     DATAFILE' || flocation || ' "\SRC_TSPACE_INDI_D1_01.dbf" ' || '
     SIZE 500M AUTOEXTEND ON NEXT 1280K MAXSIZE UNLIMITED
     EXTENT MANAGEMENT LOCAL ';
    dbms_output.put_line (sql_txt || ' = sql_txt');
-- EXECUTE IMMEDIATE sql_txt;
END;
/When you run it, you'll see something like this:
Enter value for enter_the_path: c:\d\fubar
old   5:     SELECT '&Enter_The_Path'
new   5:     SELECT 'c:\d\fubar'
CREATE TABLESPACE SRC_TSPACE_INDIA LOGGING
     DATAFILEc:\d\fubar
"\SRC_TSPACE_INDI_D1_01.dbf"
     SIZE 500M AUTOEXTEND ON NEXT 1280K MAXSIZE
UNLIMITED
     EXTENT MANAGEMENT LOCAL = sql_txt
PL/SQL procedure successfully completed.This makes it easy to see that you're missing a space after the keyword DATAFILE. There are other errrors, too. For example, the path name has to be inside the quotes with the file name, without a line-feed between them, and the quotes should be single-quotes, not double-quotes.
Is there some reason why you're using PL/SQL? In SQL, you can just say:
CREATE TABLESPACE SRC_TSPACE_INDIA LOGGING
DATAFILE '&Enter_The_Path\SRC_TSPACE_INDI_D1_01.dbf'
SIZE 500M AUTOEXTEND ON NEXT 1280K MAXSIZE UNLIMITED
EXTENT MANAGEMENT LOCAL;though I would use an ACCEPT command to given a better prompt.
Given that you want to use PL/SQL, you could assign the value above to sql_txt. If you need a separate PL/SQL variable for flocation, then you can assign it without using dual, for example:
DECLARE
    flocation     VARCHAR2 (300)     := '&Enter_The_Path';The dual table isn't needed very much in PL/SQL.
Edited by: Frank Kulash on Jan 10, 2013 6:56 AM

How to write table name in SQL according to the user input

hi
i want to select data from a table , and the table name, field name is input by the user, for example, user input table name T1, field name F1 and i want to construct a SQL like select F1 into a_var from T1 . how does the SQL statement written? thanks for your advice.

hi
for ur requirement u should go for field sysmbols...
dynamic internal tables..
u can chk this....
TYPE-POOLS : slis.
PARAMETERS : p_struc LIKE dd02l-tabname.
DATA : it_fieldcat TYPE lvc_t_fcat,
        t_output TYPE REF TO data .
FIELD-SYMBOLS: <t_output> TYPE table ,
               <wa_output> TYPE ANY,
               <fval> TYPE ANY.
CALL FUNCTION 'LVC_FIELDCATALOG_MERGE'
EXPORTING
I_BUFFER_ACTIVE              = I_BUFFER_ACTIVE
   i_structure_name             = p_struc
I_CLIENT_NEVER_DISPLAY       = 'X'
I_BYPASSING_BUFFER           = I_BYPASSING_BUFFER
I_INTERNAL_TABNAME           = I_INTERNAL_TABNAME
CHANGING
    ct_fieldcat                  = it_fieldcat
EXCEPTIONS
INCONSISTENT_INTERFACE       = 1
PROGRAM_ERROR                = 2
OTHERS                       = 3
IF sy-subrc <> 0.
MESSAGE i000(bctrain) WITH 'MERGE FAILED'.
*ELSE.
MESSAGE i000(bctrain) WITH 'MERGE SUCCESS'.
ENDIF.
CREATE DATA t_newline LIKE LINE OF <t_dyntable>.
ASSIGN t_newline->* TO <fs_dyntable>.
CALL METHOD cl_alv_table_create=>create_dynamic_table
EXPORTING
   I_STYLE_TABLE             =
    it_fieldcatalog           = it_fieldcat
   I_LENGTH_IN_BYTE          =
IMPORTING
    ep_table                  = t_output
   E_STYLE_FNAME             =
EXCEPTIONS
    generate_subpool_dir_full = 1
    OTHERS                    = 2
IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
           WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
ASSIGN t_output->* TO <t_output>.
SELECT * up to 10 rows FROM
   (p_struc) INTO
   CORRESPONDING FIELDS OF
   TABLE <t_output>.
*write : / 'dynamic table created'.
LOOP AT <t_output> ASSIGNING <wa_output>.
DO.
    ASSIGN component sy-index of structure <wa_output> to <fval>.
    IF sy-subrc <> 0.
      WRITE : /.
      EXIT.
    ELSE.
      WRITE : <fval>.
    ENDIF.
ENDDO.
ENDLOOP.
Message was edited by:
        Premalatha G

Count the number of columns return in an user-input sql query

I need to do something like this
I let an user input a sql query and then execute it
assuming the sql query is always correct, it will return a Resultset
then a table will pop up to accomodate the number of columns the resultset will produce
i'm stuck at the part on how to check how many columns of data will be return in the resultset

     ResultSet rs = stmt.executeQuery("SELECT a, b, c FROM TABLE2");
     ResultSetMetaData rsmd = rs.getMetaData();
     int numberOfColumns = rsmd.getColumnCount();

In which of the following sections of a PL/SQL block is a user-defined exception raised?

Hi,
A (somewhat elementary) question:
In which of the following sections of a PL/SQL block is a user-defined exception raised?
a) Exception section
b) Declarative section
c) Error handling section
d) Executable section
I'd be interested to hear people's answers.
Thanks.

As Etbin already noted, there are only 3 sections and user-defined exception can be raised in any of them. User-defined exception raised in declarative section example:
declare
    year_zero exception;
    pragma exception_init(year_zero,-01841);
begin
    declare
        v_dt date := to_date(1721420,'j');
    begin
        null;
    end;
exception
    when year_zero
      then
        dbms_output.put_line('Year 0!');
end;
Year 0!
PL/SQL procedure successfully completed.
SQL>
User-defined exception raised in executable section example:
declare
    year_zero exception;
    pragma exception_init(year_zero,-01841);
    v_dt date;
begin
    v_dt := to_date(1721420,'j');
exception
    when year_zero
      then
        dbms_output.put_line('Year 0!');
end;
Year 0!
PL/SQL procedure successfully completed.
SQL>
User-defined exception raised in exception handling section example:
declare
    year_zero exception;
    pragma exception_init(year_zero,-01841);
    v_dt date;
begin
    declare
        v_num number;
    begin
        v_num := 1 / 0;
      exception
        when others
          then
            v_dt := to_date(1721420,'j');
    end;
exception
    when year_zero
      then
        dbms_output.put_line('Year 0!');
end;
Year 0!
PL/SQL procedure successfully completed.
SQL>
SY.

SQL- 2005 : User Input in select statement's where cond [Input Parameter]

Hi All
i am using SQL Server 2005 , i want to select the data based on the user input in where condition,
but i am not sure what to give in where condition,can anyone have any idea on this
SELECT [NO]
      ,[NAME]
      ,[PAGE_COUNT]
FROM [DS].[DB].[tablename]
where [NO]=???
Regards
Chaitanya.A

HI
public String getEmployeeName(String employeeNumber)
          // TODO : Implement
          String name = new String();
          String exception = new String();
          try
          InitialContext initialContext = new InitialContext();
          DataSource dataSource =(DataSource) initialContext.lookup("jdbc/XXXX");
          java.sql.Connection connection = dataSource.getConnection();
          PreparedStatement stmt =connection.prepareStatement("SELECT [NAME]FROM [XXX].[ASDF].[ABCD] where [NO]=?");
          stmt.setString(1,employeeNumber);
          ResultSet result = stmt.executeQuery();
          while (result.next())
               name = result.getString("Name");
               connection.close();
               return name;
          catch (Exception e)
               exception = "Exception";
               return exception;
i used the above function to achieve my requirement
Thanks
Chaitanya.A

How to force sql developer to prompt for user input for every execution ?

Hi Folks,
Environment: Oracle 11g (on Windows 7)
SQL Developer: *3.1.07*
I am executing a PL/SQL code off Sql Developer. The code uses substitution variables to prompt user for input. However,I am only prompted for the user input for the very first run of the code. For the subsequent executions, the code simply picks up the user input from the very first run. This behavior persists for all subsequent runs of the code.
I have executed the same piece of code from SQL*PLUS and the behavior seems normal (i.e. I am prompted for fresh input for every execution)
How can flush out the old user input so I can be prompted for new user input for every run of the code in sql developer?
Thanks in advance
rogers42

Hi Rogers42,
1/try
undefine
undefine fred
select '&&fred' from dual;
[run this multiple times]
[prompts gere]
old:select '&&fred' from dual
new:select 'a' from dual
'A'
a
[prompts here]
old:select '&&fred' from dual
new:select 'b' from dual
'B'
b
2/try
exit (requires recent version of sql developer: tools->preferences->Database->worksheet->Re-initialize on script exit command)
select '&&fred' from dual;
exit
run this multiple times
[prompts here]
old:select '&&fred' from dual
new:select 'x' from dual
'X'
x
Commit
[prompts here]
old:select '&&fred' from dual
new:select 'y' from dual
'Y'
y
Commit
3/use &fred instead of &&fred
For background see
http://totierne.blogspot.co.uk/2010/04/substitution-and-bind-variables.html
-Turloch
SQLDeveloper team

Taking user input in a PL/SQL block

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