From PLSQL - Need to write a text file

Hello
I need to write a text file from data retrieved from many tables in PLSQL to the UNIX box.
Thanks
Paul
null

You can use package UTL_FILE to write out to a file. Your DBA has to make initialization changes to support this. They might already have it setup. Run this query:
SELECT value
FROM v$parameter
WHERE name = 'utl_file_dir';
To see whether it has been configured properly. The value is the directory where you can create and write files.
null

Similar Messages

When there is web service request, we need to write to text file

Hello, Im currently using a web service request (particularly the read request variable). What my application does is that when a user enters the url
http://127.0.0.1:8001/WebService/Process?1=1&2=0&3=1&4=0&5=0
LED 1 and 3 turns on, while the other LEDs are turned off. I would like also to keep text file logs on what is the current time now, and the status of the LEDs. I want only to write to the file everytime the user enters the query in the URL (I dont want to write the logs every second or so, just only when the user presses the go button in the browser)
I can now write to a text file the current datetime stamp, and already setup the web services. But I cant figure out how can I execute this write process everytime the user fires up a web request.
Basically, how can I write to a text file the status of the LEDs each time there is a URL request?
Attached is the project. Thanks
Attachments:
DOE_LabView_v2.zip ‏15 KB

One reason you might not be getting any errors is that you aren't looking for errors. Connect up the error clusters and then display what you get.
Where are you getting the path that you are writing to?
Mike...
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Is it possible to read/write to text file without deleting it?

I know how to read from a text file and how to write to a text file. The problem that i have is i need to use a text file to store data for my application to read and also for my application to write. I would like it if i could write two programs really, one reads, the other is used to update the text file. This file is a list of verbs. I thought about using databases but i couldn't get them to work. I downloaded MySQL server 5.0 and installed it. I then downloaded the driver from http://www.mysql.com/products/driver and ran the auto installer. it said everything worked out perfectly but when i try these lines:
Class.forName("com.mysql.jdbc.Driver");
I get a SQLException that says no suitible driver
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
( I thought this driver came with the JDK but i guess not, i just read about it in a java book)
I get a ClassNotFoundException
that just says sun.jdbc.odbc.JdbcOdbcDriver
So yeah, SQL is pretty much not working. I need a solution to my problem, either by using text files, or a different type of database. I heard you could use excel to create a database but i have no idea how and i hear microsoft access could also do this, however i don't have microsoft access and i don't intend on paying for it. So, here are my questions:
1st, is there a tutorial on using excel databases in java programs
(if not)
2nd is there a way to read/write/update a text file without deleting it?
(if not)
3rd is there a way to get SQL working, i have windows vista this could be the problem
(if not)
4th what could i do to store information on the hd for reading and modifying later?
thanks, lateralus

A database might be overkill just for a list of words.
Thoughts:
<ul>
<li>What is the extent of your "file updating"? If you are just appending to the file, opening it in append mode will keep the file from being clobbered.</li>
<li>Otherwise, why not create new files instead of editting them? The file names could include a version number or timestamp, allowing the reader to select the newest one.
</li>
</ul>

Write to text file qeustion

Hello all,
My first question about writing to text file is does the file need to be opened? i know you have the option to create, replace, open..., but does it need to be opened in order to properly write data to the file? Also if my application is running with a disk streaming file setup and i open the file that it is writing to will this cause an error or cause labview to lose control of the file and possibly stop writing to the file?
Thank you,
Matt

Feel free to experiment. Try writing to a file from multiple locations at once, and you'll see race conditions where data could be lost.
The reason for the Open, Write, Close type of software is because generally you are in a loop continually writing to a file, and the extra overhead of a Open and Close can be limited to when the software starts and closes, instead of having to open a new reference and close it every time you want to write to the file. Just open the reference once, work with it in a while loop, then close it once, must more efficient and better for applications that write many times to disk.
Is it necessary? No you can just use the Write to Text file giving it a path and data to write, but behind that function it will need to open and close the reference each time.
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If 10 out of 10 experts in any field say something is bad, you should probably take their opinion seriously.

Data from itab to be store in text file in desktop

hi
i am tyring to store the data from itab into a text file in desktop,but its now owrking.
i am using open dataset statment,but no where data is storing.My code:
TYPES : BEGIN OF ST_DEMO,
REG_NO(10) TYPE C,
NAME(20)   TYPE C,
ADDR(20)   TYPE C,
END OF ST_DEMO.
DATA : WA_DEMO TYPE ST_DEMO,
IT_DEMO TYPE TABLE OF ST_DEMO,
L_FNAME TYPE dxfile-filename .
PARAMETERS: P_FNAME(128) TYPE C DEFAULT '\usr\sap\put\vipin.txt' OBLIGATORY.
L_FNAME = P_FNAME.
WA_DEMO-REG_NO = '100001'.
WA_DEMO-NAME = 'ANAND'.
WA_DEMO-ADDR = 'NAGARKOVIL'.
APPEND WA_DEMO TO IT_DEMO.
OPEN DATASET L_FNAME FOR OUTPUT IN TEXT MODE ENCODING DEFAULT.
WRITE :5 'REG NUM',16 'NAME',37 'ADDRESS' .
LOOP AT IT_DEMO INTO WA_DEMO.
IF SY-SUBRC = 0.
    TRANSFER WA_DEMO TO L_FNAME.
    WRITE :/5 WA_DEMO-REG_NO,16 WA_DEMO-NAME,37 WA_DEMO-ADDR.
ENDIF.
ENDLOOP.
close DATASET L_FNAME.
please tell me where is the prob?I wan to schedule it for background job.
regds
vipin

hi
here is the code for : "data from itab to be store in text file in desktop"
TABLES: vbak.    " standard table
*                           Type Pools                                 *
TYPE-POOLS: slis.
*                     Global Structure Definitions                     *
*-- Structure to hold data from table CE1MCK2
TYPES: BEGIN OF tp_itab1,
       vbeln LIKE vbap-vbeln,
       posnr LIKE vbap-posnr,
       werks LIKE vbap-werks,
       lgort LIKE vbap-lgort,
       END OF tp_itab1.
*-- Data Declaration
DATA: t_itab1 TYPE TABLE OF tp_itab1.
DATA : i_fieldcat TYPE slis_t_fieldcat_alv.
*                    Selection Screen                                 *
*--Sales document-block
SELECTION-SCREEN BEGIN OF BLOCK b1 WITH FRAME TITLE text-t01.
SELECT-OPTIONS: s_vbeln FOR vbak-vbeln.
SELECTION-SCREEN END OF BLOCK b1.
*--Display option - block
SELECTION-SCREEN BEGIN OF BLOCK b2 WITH FRAME TITLE text-t02.
PARAMETERS: alv_list RADIOBUTTON GROUP g1,
            alv_grid RADIOBUTTON GROUP g1.
SELECTION-SCREEN END OF BLOCK b2.
*file download - block
SELECTION-SCREEN BEGIN OF BLOCK b3 WITH FRAME TITLE text-t03.
PARAMETERS: topc AS CHECKBOX,
            p_file TYPE rlgrap-filename.
SELECTION-SCREEN END OF BLOCK b3.
*                      Initialization.                                *
*                      At Selection Screen                            *
AT SELECTION-SCREEN ON VALUE-REQUEST FOR p_file.
CALL FUNCTION 'F4_DXFILENAME_4_DYNP'
    EXPORTING
      dynpfield_filename = 'P_FILE'
      dyname             = sy-cprog
      dynumb             = sy-dynnr
      filetype           = 'P'      "P-->Physical
      location           = 'P'     "P Presentation Srever
      server             = space.
AT SELECTION-SCREEN ON s_vbeln.
PERFORM vbeln_validate.
*                           Start Of Selection                         *
START-OF-SELECTION.
*-- Fetching all the required data into the internal table
PERFORM select_data.
*                           End Of Selection                           *
END-OF-SELECTION.
IF t_itab1[] IS NOT INITIAL.
    IF topc IS NOT INITIAL.
      PERFORM download.
      MESSAGE 'Data Download Completed' TYPE 'S'.
    ENDIF.
    PERFORM display.
ELSE.
    MESSAGE 'No Records Found' TYPE 'I'.
ENDIF.
*                           Top Of Page Event                          *
TOP-OF-PAGE.
*& Form           :      select_data
* Description     : Fetching all the data into the internal tables
* parameters    : none
FORM select_data .
SELECT vbeln
     posnr
     werks
     lgort
     INTO CORRESPONDING FIELDS OF TABLE t_itab1
     FROM vbap
     WHERE vbeln IN s_vbeln.
IF sy-subrc <> 0.
    MESSAGE 'Enter The Valid Sales Document Number'(t04) TYPE 'I'.
    EXIT.
ENDIF.
ENDFORM.                    " select_data
*& Form        : display
* decription : to display data in given format
* parameters   : none
FORM display .
IF alv_list = 'X'.
    PERFORM build_fieldcat TABLES i_fieldcat[]
                           USING :
*-Output-field Table      Len Ref fld Ref tab Heading    Col_pos
   'VBELN'       'T_ITAB1'     10   'VBAP' 'VBELN'    ''            1,
   'POSNR'       'T_ITAB1'     6    'VBAP' 'POSNR'    ''            2,
   'WERKS'       'T_ITAB1'     4    'VBAP' 'WERKS'    ''            3,
   'LGORT'       'T_ITAB1'     4    'VBAP' 'LGORT'    ''            4.
    CALL FUNCTION 'REUSE_ALV_LIST_DISPLAY'
      EXPORTING
        i_callback_program       = sy-repid
*        i_callback_pf_status_set = c_pf_status
        i_callback_user_command = 'USER_COMMAND '
*        it_events                = t_alv_events[]
        it_fieldcat              = i_fieldcat[]
      TABLES
        t_outtab                 = t_itab1[]
      EXCEPTIONS
        program_error            = 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.
ENDIF.
IF alv_grid = 'X'.
    PERFORM build_fieldcat TABLES i_fieldcat[]
                             USING :
*-Output-field Table      Len Ref fld Ref tab Heading    Col_pos
     'VBELN'       'T_ITAB1'     10   'VBAP' 'VBELN'    ''            1,
     'POSNR'       'T_ITAB1'     6    'VBAP' 'POSNR'    ''            2,
     'WERKS'       'T_ITAB1'     4    'VBAP' 'WERKS'    ''            3,
     'LGORT'       'T_ITAB1'     4    'VBAP' 'LGORT'    ''            4.
    CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
      EXPORTING
        i_callback_program       = sy-repid
*        i_callback_pf_status_set = c_pf_status
        i_callback_user_command = 'USER_COMMAND '
        it_fieldcat              = i_fieldcat
      TABLES
        t_outtab                 = t_itab1[]
    EXCEPTIONS
   program_error                     = 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.
ENDIF.
ENDFORM.                    " display
*& Form        : vbeln_validate
* description : to validate sales document number
* parameters   : none
FORM vbeln_validate .
DATA: l_vbeln TYPE vbak-vbeln.
SELECT SINGLE vbeln
    FROM vbak
    INTO l_vbeln
    WHERE vbeln IN s_vbeln.
IF sy-subrc NE 0.
    MESSAGE 'ENTER THE VALID SALES DOCUMENT NO:' TYPE 'I'.
    EXIT.
ENDIF.
ENDFORM.                    " vbeln_validate
*& Form       :build_fieldcat
* Description : This routine fills field-catalogue
* Prameters : none
FORM build_fieldcat TABLES fpt_fieldcat TYPE slis_t_fieldcat_alv
                    USING   fp_field     TYPE slis_fieldname
                            fp_table     TYPE slis_tabname
                            fp_length    TYPE dd03p-outputlen
                            fp_ref_tab   TYPE dd03p-tabname
                            fp_ref_fld   TYPE dd03p-fieldname
                            fp_seltext   TYPE dd03p-scrtext_l
                            fp_col_pos   TYPE sy-cucol.
*-- Local data declaration
DATA:   wl_fieldcat TYPE slis_fieldcat_alv.
*-- Clear WorkArea
wl_fieldcat-fieldname       = fp_field.
wl_fieldcat-tabname         = fp_table.
wl_fieldcat-outputlen       = fp_length.
wl_fieldcat-ref_tabname     = fp_ref_tab.
wl_fieldcat-ref_fieldname   = fp_ref_fld.
wl_fieldcat-seltext_l       = fp_seltext.
wl_fieldcat-col_pos         = fp_col_pos.
*-- Update Field Catalog Table
APPEND wl_fieldcat TO fpt_fieldcat.
ENDFORM.                    "build_fieldcat
*& Form        : download
* description : To Download The Data
* Parameters : none
FORM download .
DATA: l_file TYPE string.
l_file = p_file.
CALL FUNCTION 'GUI_DOWNLOAD'
    EXPORTING
      filename                = l_file
      filetype                = 'ASC'
    TABLES
      data_tab                = t_itab1
    EXCEPTIONS
      file_write_error        = 1
      no_batch                = 2
      gui_refuse_filetransfer = 3
      invalid_type            = 4
      no_authority            = 5
      unknown_error           = 6.
IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*         WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
ENDFORM.                    " download
hope it will help you
regards
rahul

Write to text file problem

I have a write to 'text file' in a sub vi. It is a popup where user can change his program.
For some reason, only the first time it is called, it actually writes to the text file.
As long as the sub vi is in memory, and I call it again and press ok to write to text file, nothing happens.
I've tried 'close file', but that doesnt help. Deleting the files from the disk before again calling the sub vi doesnt help either, it wont write
to file again. Is this a bug or am I missing something?! Im on labview 2010

Post your VI (along with sub-VI's if any).
I am not allergic to Kudos, in fact I love Kudos.
Make your LabVIEW experience more CONVENIENT.

Write to text file returns no error even if the underlying file is deleted

Hi,
I'm using a CompactRIO and writing to a text file underneath the C drive.
I'm running into an unexpected situation when I am trying to error check my file handling. I assumed that if the underlying file being written to that was created by open/create/replace vi and written to with the "Write to Text File" vi, would return an error if I delete the file from underneath it in the file system., yet there is no reported error and the function carrys on seemingly successfully writing to a file that has been deleted.
Anyone know why this happens and how to potentiallly remedy?

Ouch, this obviously isn't ideal but is probably down to the filesystem on the CompactRIO.
I would consider putting in a check - doing something like getting the file position from the file might return an error if the file no longer exists.
Certified LabVIEW Architect, Certified TestStand Developer
NI Days (and A&DF): 2010, 2011, 2013, 2014
NI Week: 2012, 2014
Knowledgeable in all things Giant Tetris and WebSockets

"Write to text file" when button is pushed?

I want to use the function "write to text file" when a button is pushed, and write only once.
The same goes for "read from text file

Hello!
Look at the following examples shipped with LabVIEW Professional and LabVIEW Full. Event structure example is not installed with Base package.
Open up 'Example Finder', click on the 'Search' tab, enter keyword 'events' and you fill find several examples. The ones of interest for you is 'New Event Handler.VI" and 'Old Event Handler.VI', where the first uses the event structure and the other uses the standard state machine architecture.
Regards,
Jimmie Adolph
Systems Engineer Manager, National Instruments Northern Region
Bring Me The Horizon - Sempiternal

Write to Text File - unflatten channel string

Hi all,
This is my first post on the forums! It's been very helpful for me but I have not been able to find a solution to my (simple) problem.
Operating system: Windows 7 (64-bit)
Labview 2012 Full Development
I'm using the DAQmx unflatten channel string to get the names of the channels, and when I Write to Text File, I get the names of channels to be displayed vertically, ie a new row for each channel in a column. I'd like to "transpose" this, but obviously you cannot transpose a 1d array. Any ideas on how I can do this?
Any and all ideas are appreciate, thank you in advance,
-AK
Solved!
Go to Solution.

Show us how you are doing this.
My guess is that once you get the data, you have linefeed characters separating the channel names rather than some other delimiter such as a comma or a tab.
Depedning on how you are going from the channel names to the file (a string, an array of strings, Write to Spreadsheet File, Write to Text file, ....) will determine the best way to fix the problem for you.

Write to text file (including spaces/next line) using oracle??

How to write to text file using oracle? And how do I handle spaces/next line? (i was trying to use spaces(ch(32)), however it is just converted into squares in the text file.) thanks!

989873 wrote:
How about tabs?It does not matter what character it is. UTL_FILE deals correctly with any text file. Tabb is CHR(9):
SQL> declare
2       v_file utl_file.file_type;
3       v_total_rec number := 0;
4       v_total_sal number := 0;
5 begin
6      v_file := UTL_FILE.FOPEN('TEMP','TEST.TXT','w');
7      for v_rec in (select * from emp) loop
8        v_total_rec := v_total_rec + 1;
9        v_total_sal := v_total_sal + v_rec.sal;
10        UTL_FILE.PUT_LINE(
11                          v_file,
12                          lpad(v_rec.deptno,2) || chr(9) || rpad(v_rec.ename,14) || chr(9) || to_char(v_rec.sal,'99999D99')
13                         );
14      end loop;
15      UTL_FILE.PUT_LINE(v_file,'Total Salary:' || chr(9) || v_total_sal);
16      UTL_FILE.PUT_LINE(v_file,'Total Records:' || chr(9) || v_total_rec);
17      UTL_FILE.FCLOSE(v_file);
18 end;
19 /
PL/SQL procedure successfully completed.
SQL> declare
2       v_file utl_file.file_type;
3       v_line varchar2(100);
4 begin
5      v_file := UTL_FILE.FOPEN('TEMP','TEST.TXT','r');
6      loop
7        UTL_FILE.GET_LINE(v_file,v_line);
8        DBMS_OUTPUT.PUT_LINE(v_line);
9      end loop;
10    exception
11      when no_data_found
12        then
13          UTL_FILE.FCLOSE(v_file);
14 end;
15 /
20      SMITH              800.00
30      ALLEN             1600.00
30      WARD              1250.00
20      JONES             2975.00
30      MARTIN            1250.00
30      BLAKE             2850.00
10      CLARK             2450.00
20      SCOTT             3000.00
10      KING              5000.00
30      TURNER            1500.00
20      ADAMS             1100.00
30      JAMES              950.00
20      FORD              3000.00
10      MILLER            1300.00
Total Salary:   29025
Total Records: 14
PL/SQL procedure successfully completed.
SQL>SY.

Write to Text File.vi Output file all but first line start with tab

The attached PNG shows the code used to build up concatenated strings into a string array for the first four lines, thence to a string Array, to Spreadsheet String.vi and, finally, the use of Write to Text File.vi
The lower right corner shows the result loaded into a spreadsheet. Note the 3 blank entries marked by a filled red rectangle. Examination of hidden characters shows there is a tab at the beginning of lines 2, 3 and 4.
There is no tab shown in the code. How do those tabs get there? How do I stop them?
I have tried with the option "Convert EOL" both on and off with no difference.
The Help states that an OS-dependent EOL character is appended to each line. I can't imagine the Windows EOL character includes a tab.
Solved!
Go to Solution.
Attachments:
Tab Mystery.PNG ‏29 KB

wildcatherder wrote:
I am still puzzled as to why those additional tabs were added by Array to Spreadsheet String. I'm holding in my hand a printout of an old LabVIEW 8 program with that construction, which is known to work properly.
Makes complete sense when you look at your code. You build a string, including an end-of-line character, and put that string into an array. Then, when you run it through Array to Spreadsheet String, it puts a tab after every array element, and new line at the end of each row in the array. The first element of your array contains a new line but Array to Spreadsheet String doesn't know about it; it still inserts a tab between that array element and the next one, giving you the tabs.

How can I copy records from a Table to a ASCII/ Text file.?

Hi
Can you help me with code for copying the records from an oracle table to a Text file,? I like to copy the 1200 records from a 7 field table to a .txt file and print out the out put.
earliest reply is deeply appreciated.
regrds
Saj

All I would do is, in SQL*Plus, spool your output to a file and change the pagesize to however many lines you want before the next header break.
For example:
SET PAGESIZE 79
SPOOL OUTPUT.TXT
Would create an output file called OUTPUT.TXT with header rows produced after every 79 rows of data.

Write to text file. Append to existing file. Create file if file doesn't exist.

Hi folks,
up to LabVIEW 7 there was a wonderful "Write to Text File" vi which allowed the option "Append to File". Now, in LabVIEW 8, this old vi is not longer supported anymore. Instead, I am suggested to use a new "Write to Text File" vi. This vi does not offer the option "Append to File" anymore. Rather it is proposed in the online help that one should use the "Set File Position" in order to append text to the file. This much less straightforward than the old solution. Furthermore, I miss an option which would create the complete path if it doesn't exist yet.
To summarize: Isn't there really any smart "Write to Text File" vi available which offers both the options "Append" and "Create path if file does not yet exist". Of course, I could write such a file on my own but I am sure that it is of such general interest that it already exist. In any situation, when a log file shall be written, the wanted vi would be ideal.
Thanks a lot,
Peter

Ray,
I know that the old vi is still available. See the screenshot which I attach to this message. What I am missing is an option "Create file or even complete path if file or path do not yet exist.". Is there any reason why NI doesn't provide neither this option nor a simple "Append to file" functionality in the new "Write to Text File" vi?
Regards,
Peter
Attachments:
Clipboard01.png ‏7 KB

Write to text file while scrolling table issue

Hi all,
I have a LabVIEW application that logs data using 'write to text file' every second. This is a bckground task in a sub-VI. On the main screen I have several tables that have scrollbars. Every time the file is written the scrolling of a table is effectivley canceled. It is then necessary to click on the scrollbar again to re-start scrolling the table. I guess this is an issue with the OS but not sure yet. I have not tested other operating systems yet. I thought I would try the forum first. Has anyone else experienced this issue? Any ideas on how to fix this?
I have tried using list boxes instead of tables but the same issue exists.
I'm using windows 7 and LabVIEW 2011.
Thank you.
Certified LabVIEW Architect

Hi Steve, thanks for offering to help. Right now I'm on a machine with LabVIEW 2010 and XP and the issue does not exist. But I have created a little test VI that should demonstrate the issue once running on LabVIEW 2011 SP1 and Windows 7. I can't confirm this VI will demonstrate the issue until later today when I can test it on the problem system myself. Feel free to give it a go and let us know what you find, or wait until I confirm the attached VI will demonsrate the issue (10 to 12 hrs time).
Thank again.
Certified LabVIEW Architect
Attachments:
Table scroll test_1.vi ‏13 KB

Write a text file on client

I want to realise an applet which can write a text file on client. I use java 2 and an certified applet.
I'm searching a script.
If you have a solution or a script thank you.
A+
Ps: I'm french and sorry for my english

FileOutputStream fos = new FileOutputStream(filname);
DataOutputStream dos = new DataOutputStream(fos);
try {
dos.writeBytes("some string");
} catch (Exception e) {
out.println(e.toString());
dos.close();
fos.close();

From PLSQL - Need to write a text file

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