How to execute an expression which is in a string

hi
i am facing one interesting problem
i want to evaluate an expression like
sin^2 (theta) * cos^2 (phi) which i am getting in string object
something like expression entered by an user
and i want to evaluate it in a program
how do i do that
i mean how to treat this string as a statement
thanx in advance as usual

Here's one of probably many.
http://tp.lc.ehu.es/anonym/java/eval.html
Google is your friend.
http://www.google.com/search?hl=en&q=java+eval&btnG=Google+Search

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hello,
How to execute an SQL query present in a string inside an ABAP program

Raut,
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8< snip -------
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8< snip ---------
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How to download the data which is in the table?

how to download the data which is in the table?
every field data in the table i want to download and once the download is finished then i have to set the flag as 'download is finished ' as one field in table?
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Edited by: phani kumarDurusoju on Jan 9, 2008 6:36 AM

One way is to Download the data Directly from the database table using the path SE11->Give table name ->Execute -> system ->List ->Save ->Local File
There u can downlaad the data .
The ither way is to use the code
The Following Code will be helpfull to You
Data :ITAB TYPE TRUXS_T_TEXT_DATA,
        FILE TYPE STRING.
         C_ASC     TYPE CHAR10   VALUE 'ASC',
DATA: L_STATUS TYPE C,
       L_MESSAGE TYPE PMST_RAW_MESSAGE,
       L_SUBJECT TYPE SO_OBJ_DES.
DATA: L_FILELENGTH TYPE I.
PERFORM download_to_pc
              TABLES
                 itab
              USING
                 filename
                 c_asc
                 c_x
              CHANGING
                 l_status
                 l_message
                 l_filelength.
FORM DOWNLOAD_TO_PC TABLES   DOWNLOADTAB
                    USING    FILENAME
                             FILETYPE TYPE CHAR10
                             DELIMITED
                    CHANGING STATUS
                             MESSAGE TYPE PMST_RAW_MESSAGE
                             FILELENGTH TYPE I.
DATA: L_FILE TYPE STRING,
        L_SEP.
L_FILE = FILENAME.
IF NOT DELIMITED IS INITIAL.
    L_SEP = 'X'.
ENDIF.
STATUS = 'S'.
CALL FUNCTION 'GUI_DOWNLOAD'
    EXPORTING
      FILENAME                = L_FILE
      FILETYPE                = FILETYPE
      WRITE_FIELD_SEPARATOR   = L_SEP
    IMPORTING
      FILELENGTH              = FILELENGTH
    TABLES
      DATA_TAB                = DOWNLOADTAB
    EXCEPTIONS
      FILE_WRITE_ERROR        = 1
      NO_BATCH                = 2
      GUI_REFUSE_FILETRANSFER = 3
      INVALID_TYPE            = 4
      NO_AUTHORITY            = 5
      UNKNOWN_ERROR           = 6
      HEADER_NOT_ALLOWED      = 7
      SEPARATOR_NOT_ALLOWED   = 8
      FILESIZE_NOT_ALLOWED    = 9
      HEADER_TOO_LONG         = 10
      DP_ERROR_CREATE         = 11
      DP_ERROR_SEND           = 12
      DP_ERROR_WRITE          = 13
      UNKNOWN_DP_ERROR        = 14
      ACCESS_DENIED           = 15
      DP_OUT_OF_MEMORY        = 16
      DISK_FULL               = 17
      DP_TIMEOUT              = 18
      FILE_NOT_FOUND          = 19
      DATAPROVIDER_EXCEPTION = 20
      CONTROL_FLUSH_ERROR     = 21
      OTHERS                  = 22.
IF SY-SUBRC <> 0.
    STATUS = 'E'.
    CASE SY-SUBRC.
      WHEN 1.
        MESSAGE = 'gui_download::file write error'.
      WHEN 2.
        MESSAGE = 'gui_download::no batch'.
      WHEN 3.
        MESSAGE = 'gui_download::gui refuse file transfer'.
      WHEN 4.
        MESSAGE = 'gui_download::invalid type'.
      WHEN 5.
        MESSAGE = 'gui_download::no authority'.
      WHEN 6.
        MESSAGE = 'gui_download::unknown error'.
      WHEN 7.
        MESSAGE = 'gui_download::header not allowed'.
      WHEN 8.
        MESSAGE = 'gui_download::separator not allowed'.
      WHEN 9.
        MESSAGE = 'gui_download::filesize not allowed'.
      WHEN 10.
        MESSAGE = 'gui_download::header too long'.
      WHEN 11.
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      WHEN 12.
        MESSAGE = 'gui_download::dp error send'.
      WHEN 13.
        MESSAGE = 'gui_download::dp error send'.
      WHEN 14.
        MESSAGE = 'gui_download::ubknown dp error'.
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        MESSAGE = 'gui_download::dp out of memory'.
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        MESSAGE = 'gui_download::disk full'.
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        MESSAGE = 'gui_download::dataprovider exception'.
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      WHEN 22.
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ENDIF.
ENDFORM.             "download_to_pc
At The End Reward points.
Please it's Required.
Thanks ,
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How to execute a SELECT statement in java??

Hello !!
In my java program , i need to delete a record of number X, so
i accept the number X from the keyboard
Then before deleting it
i want the program to show me the name, age of the record which has the number X
How to do this

hello kylas
actually i didnt get why this program example?? wats
its executing ??? Look at reply #3 in your other thread:
http://forum.java.sun.com/thread.jspa?threadID=713289&messageID=4126346
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Good Luck
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How to Execute a Remote Procedure in Portal using Database Link

Hi,
I followed the instructions to create a Portal form for a remote procedure. But I am encountering the following error. Can someone advise what may be the cause?
Failed to execute - Missing string(create_package_body) language(us) domain (wwv) sub_domain (wwv_builder) (WWV-04300)
ORA-04020: deadlock detected while trying to lock object PUBLIC.PORTLET_SCHEMA (WWV-11230)
Failed to parse as PORTAL - (WWV-08300)
PURPOSE
How to execute a remote procedure in Portal using Database Link.
DESCRIPTION
This procedure assumes that you have two databases, one of which is remote, and Portal is configured in the other.
Remote Database A:
==================
1) Create a procedure as follows: Create or Replace PROCEDURE SCOTT.ADD_TWO_VALUES ( v_one IN NUMBER, v_two IN NUMBER, v_result OUT NUMBER) as begin v_result :=v_one+v_two; end; 2) Grant execute privileges to PUBLIC on the procedure.
Database B (where Portal is configured): ========================================
1) Create a public database link and choose to connect as a specific user (say SYSTEM). By default, in an Oracle 8i database, the "global_names" parameter in initSID.ora (or init.ora) file is set to "true". This Global Naming parameter enforces that a dblink has the same name as the database it connects to. Therefore, if the remote global database (A) name is "ora8.acme.com" then the database link should also be named as "ora8.acme.com".
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4) Portal does not have an option to create a form based on a synonym. Therefore, if you want to create a form instead of a dynamic page, create a wrapper procedure and then create a form based on this procedure. For example: Create or Replace PROCEDURE PORTAL30.ADD_TWO_VALUES_PR ( v_one IN NUMBER, v_two IN NUMBER, v_total OUT NUMBER) as begin add_two_values(v_one, v_two, v_total); end;
5) Grant execute privileges to PUBLIC on the procedure.

hello...
any input will welcomed... Thanks..

Execute the expression in select statement

CREATE TABLE TEST1
OFFICE_PRODUCTS     NUMBER,
OFFICE_ELECTRONICS NUMBER
Insert into TEST1 (OFFICE_PRODUCTS, OFFICE_ELECTRONICS) Values(1, 0);
COMMIT;
CREATE TABLE TEST2
EXPORT_FIELD_NAME         VARCHAR2(100 BYTE),
EXPORT_COLUMN_EXPRESSION VARCHAR2(100 BYTE)
Insert into TEST2
   (EXPORT_FIELD_NAME, EXPORT_COLUMN_EXPRESSION)
Values ('A1', 'least(OFFICE_PRODUCTS, OFFICE_ELECTRONICS)');
COMMIT; I want to be execute the expression should run in select statement how to do?
and tried as like below,it's not working.
select (select EXPORT_COLUMN_EXPRESSION from test2 where EXPORT_FIELD_NAME='A1') FROM TEST1;

968892 wrote:
CREATE TABLE TEST1
OFFICE_PRODUCTS     NUMBER,
OFFICE_ELECTRONICS NUMBER
Insert into TEST1 (OFFICE_PRODUCTS, OFFICE_ELECTRONICS) Values(1, 0);
COMMIT;
CREATE TABLE TEST2
EXPORT_FIELD_NAME         VARCHAR2(100 BYTE),
EXPORT_COLUMN_EXPRESSION VARCHAR2(100 BYTE)
Insert into TEST2
(EXPORT_FIELD_NAME, EXPORT_COLUMN_EXPRESSION)
Values ('A1', 'least(OFFICE_PRODUCTS, OFFICE_ELECTRONICS)');
COMMIT; I want to be execute the expression should run in select statement how to do?
and tried as like below,it's not working.
select (select EXPORT_COLUMN_EXPRESSION from test2 where EXPORT_FIELD_NAME='A1') FROM TEST1;
Your problems are many...
a) it's very poor design to be storing expressions or sql statements or any 'executable' style code as data in the database.
b) what you're storing is a string of characters. Oracle isn't going to miraculously know that that is some expression that has to be evaluated, so why should it decide to treat it as such?
c) this poor design can lead to security issues especially around SQL injection.
d) to actually perform what you want would require you to build a dynamic SQL statement and then execute that using EXECUTE IMMEDIATE or DBMS_SQL (or for a 3rd party client, a Ref Cursor), but then there are numerous issues around doing dynamic SQL, aside from SQL injection, in that you are producing code that is not validated at compile time and can thus lead to bugs showing only at run-time and sometime only under certain conditions; the code is harder to maintain; the code can potentially be avoiding the use of bind variables, impacting on resources and performance on the database; the final query can be difficult to know just from reading the code, making further development or debugging a pain in the posterior. Essentially, dynamic SQL is considered very poor design and is 99.9% of the time used for the wrong reasons.
So, why are you trying to do this? What is the business requirement you are trying to solve?

How to execute a .sql file from a batch file

Hi all
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Try
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How to execute an expression which is in a string

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