Utl_file.fopen to create a new file

The privileges needed to access files in a directory object are operating system specific. Together, the file location and name must represent a legal filename on the system, and the directory must be accessible.

The number of bytes actually returned to the user will be the lesser of:. If unspecified, Oracle supplies a default value of FOPEN in text mode are encoded in the database character set. If an opened file is not encoded in the expected character set, the result of an attempt to read the file is indeterminate. Operating system-specific parameters, such as C-shell environment variables under UNIX, cannot be used in the file location or file name parameters.

You should not reference or change components of this record. Reads a RAW string value from a file and adjusts the file pointer ahead by the number of bytes read. Accepts as input a RAW data value and writes the value to the output buffer. This procedure closes all open file handles for the session.

This procedure copies a contiguous portion of a file to a newly created file. The source file is opened in read mode. The destination file is opened in write mode. A starting and ending line number can optionally be specified to select a portion from the center of the source file for copying. Line number at which to begin copying. The default is 1 for the first line.

Line number at which to stop copying. The default is NULL, signifying end of file. Normally, data being written to a file is buffered. The data must be terminated with a newline character. Flushing is useful when the file must be read while still open. For example, debugging messages can be flushed to the file so that they can be read immediately.

It raises an exception if the file is not open. It returns 0 for the beginning of the file. This function opens a file. You can specify the maximum line size and have a maximum of 50 files open simultaneously. Directory location of file.

This string is a directory object name and must be specified in upper case. File name, including extension file type , without directory path. Maximum number of characters for each line, including the newline character, for this file minimum value 1, maximum value FOPEN returns a file handle, which must be passed to all subsequent procedures that operate on that file.

This function opens a file in national character set mode for input or output, with the maximum line size specified. You can have a maximum of 50 files open simultaneously. With this function, you can read or write a text file in Unicode instead of in the database character set. An exception is returned on failure. This procedure renames an existing file to a new name, similar to the UNIX mv function. Permission on both the source and destination directories must be granted.

You can use the overwrite parameter to specify whether or not to overwrite a file if one exists in the destination directory. Together, the file location and name must represent a legal filename on the system, and the directory must be accessible. The number of bytes actually returned to the user will be the lesser of:.

If unspecified, Oracle supplies a default value of Operating system-specific parameters, such as C-shell environment variables under UNIX, cannot be used in the file location or file name parameters. Reads a RAW string value from a file and adjusts the file pointer ahead by the number of bytes read. This procedure closes all open file handles for the session.

This procedure copies a contiguous portion of a file to a newly created file. The source file is opened in read mode. The destination file is opened in write mode. A starting and ending line number can optionally be specified to select a portion from the center of the source file for copying. The line number at which to stop copying.

The default is NULL, signifying end of file. Normally, data being written to a file is buffered. The data must be terminated with a newline character. Flushing is useful when the file must be read while still open. For example, debugging messages can be flushed to the file so that they can be read immediately. It raises an exception if the file is not open. It returns 0 for the beginning of the file.

This function opens a file. You can specify the maximum line size and have a maximum of 50 files open simultaneously. Directory location of file. This string is a directory object name and is case sensitive. The default is uppercase. File name, including extension file type , without directory path.

Maximum number of characters for each line, including the newline character, for this file minimum value 1, maximum value FOPEN returns a file handle, which must be passed to all subsequent procedures that operate on that file.

This function opens a file in Unicode for input or output, with the maximum line size specified. You can have a maximum of 50 files open simultaneously. With this function, you can read or write a text file in Unicode instead of in the database charset. Maximum number of characters for each line, including the newline character, for this file. An exception is returned on failure. This procedure renames an existing file to a new name, similar to the UNIX mv function.

Permission on both the source and destination directories must be granted. You can use the overwrite parameter to specify whether or not to overwrite a file if one exists in the destination directory. This procedure adjusts the file pointer forward or backward within the file by the number of bytes specified. A reader, April 02, - am UTC. April 02, - am UTC. No, there is not. You would typically use a java stored procedure to perform that operation. Thanks Tom for the great function for dumping file in ascii format.

But i would like to dump the ascii file at the client side. April 23, - pm UTC. I did this successfully.. That was the problem. I need to know some more information. I want to retrieve data from database on some criteria and will be concatinating it to a single string and have to move LOB file and from the LOB i should move to a. How should I accomplish this. Can you provide the sample. Thanx a lot!! June 27, - am UTC.

How it is generated?? June 28, - am UTC. You put a file on the server. You create a bfile object which is nothing more then a directory and a filename. How does the file get to the server? Anyway you would like to get it there -- that is outside of our control. This has a limitation of PUT command. After this command will be buffer will be flushed automatically or do I need to do it explicitly? I want to ensure that the file is visible to the Java stored proc.

I want to avoid having to include a sleep to wait for the file to become ready. The OS is Solaris. July 30, - pm UTC. You need not fflush if you are going to close. As soon as you close the file, Java can "see it" -- definitely.

It is most likely buffered by the OS in some way but that is beyond our control. Close it and you can see it. Hi Sir, I have a problem like in a file I will the header and contect , first line is the header and from the second line data will be there. The data will be in tab separated data. Or any other way to do it Please it is very critical for me and very urgent.

I will be grateful if you help me on this regard Thanks Siva Kumar. October 28, - am UTC. If you know how to write procedural code, implement algorithms and logic -- and you know PLSQL, this is something you need to do.

If you do not know how to write procedural code, implement algorithms and logic, you need to hire someone that does to help you out. Thanks Siva Kumar. October 29, - am UTC. It's great. However, I have one small problem, MS Word keeps using the first row of data as the header row.

October 31, - pm UTC. File Handle is assignable? Robert, November 11, - pm UTC. Tom, File handles are totally assignable, right? It's just I don't think I ever read about this specific action being OK. I tested this and it seems to work as I expected. November 11, - pm UTC. Thanks for your valuable information. But I have one problem, In my most of the tables few fields are notes around varchar2 and user had pressed ENTER key "carriage return-line feed" and because of this rest of the fields of record started in new lines.

For e. Output of. This is test for pressing the "Enter" key. November 18, - pm UTC. Uh huh - and what would you like to have happen here? Thanks Tom, I did change and working fine. But I have one more problem. It's working for records those have few characters in notes field but failing if notes field is bigger. Could you please help how to solve this issue.

November 19, - pm UTC. Thank you. If my assumption is correct then should I worry about below local code fragment using only USER to uniquely identify the file: -- Open file using newer fopen to get around 1KB max.

Are we using a poor file naming practice or is it OK i. Thanks for your time, -Mike. November 21, - pm UTC. Another great Oracle feature. Thanks, -Mike. November 25, - am UTC. You'll end up with garbage in that file -- one session will see another sessions stuff. It'll be nasty. Tom: I have a requirement to convert several C programs that were used with informix to create query and create fixed width data on unix to ones that work with oracle. Now, I am not familiar with C but looking at your above solution it looks to me that it is much easier for me to take the queries from C program and plug them into the procedure and get my output files.

Do you agree or there is something I am missing? Thank you,. January 06, - pm UTC. C is faster. Yes, of course -- think about it -- it is just a stored procedure to dump a query. I'm afraid however people will look at it and say "oh, informix was faster" cause that c program will be much faster.

TOm: We are only talking about a database with hundreds of records. They should not notice anything. C is faster because in this case, it is C and the major time consumption spent on dumping to flat files is in the writing of the data -- something C is slightly more efficient than PLSQL at doing. Tom: Your example show comma-delimited output. January 07, - am UTC. January 08, - pm UTC. I'm an equal opportunity tools user. Tom could shed some light if iam wrong.

Thanks RameshG. Esql prgram mo, January 08, - pm UTC. There is a lot of literal insertions based on values of each record. Am I wrong? You said that the C code should work with oracle. Would I test that out by running the DLL file from the unix prompt? It is our your job. This is just really an exercise in programming after all. See otn. I also got it in unix. Any ideas? January 14, - pm UTC. Tom: I added exceptions to check where the error is coming from and here are the results.

Would I be able to do this or I can not add a local directory to the parameter too? January 15, - am UTC. Your local filesystem, probably not visible. Tom: Here is my parameter. IT still does not work.

Tom: sorry I copied the wrong text. When I telnet to it and create a text file it works. However I am logging in with a unix user account. Tom: IT works. What account does it use. Is there a way to know oracle user privileges on unix.

Thanks a lot,. What account does it use Mark A. Williams, January 15, - pm UTC. So, the answer to the question "what account does it use? The 'ls' command will show "owner", "group", and "other" permissions for directories and files, so you can use it to surmise "oracle user privileges on unix" HTH, Mark. If your client runs on the database server you have the option of not using sqlnet, instead using what I vaguely remember as named pipes, in which case the shadow process is run as the owner of the client process.

I vaguely again recall that this process ownership behavior is optional, controlled somehow by an Oracle parameter. I prefer this mode especially in development, because it allows one to clean up one's own shadow processes as needed. Not that I ever need to, of course. Out of curiosity, did a small test, connected locally, shadow process owned by me pkelley not by oracle. The utl file output file is still owned by oracle. All rights reserved. Connected to: Oracle8i Enterprise Edition Release 8.

January 16, - am UTC. The oracle binary runs with an effective uid of the Oracle software. I already tried this, no pbm.

The file need to be viewed as any normal text file, on a notepad, or opened in Excel, or any other application. The text output program is to be a monthly automatic process.

I do not wish to call an external program to perform the stripping job. February 04, - am UTC. Add the chr 13 and they windows people may be apeased. Is it any work around way to accomplish this?? In sql server they're using BCP command i don't know how the way it works in SQL server and i doesn't want to know also. The same functionallity they're asking in oracle.

If yes give me example to get thru. From ur quote u said Clent tools are required to do,what do u mean by Clent tool?? DB is Oracle8i 8. February 04, - pm UTC. Hi Tom, As u said they're not running bcp from server ,but what they're doing here is writing file to another machine.

To be clear there're 3 nodes A, B , and C. They're running bcp in node A and writing the file to the folder of Node B. Of course directory where they going to write should be shared. Where we can specify the directory to write.

If it is not possible then how can we do achieve this in oracle?? But it does not seem to be working Much Thanks. April 03, - pm UTC. A reader, April 03, - pm UTC. Ok, you didn't use my example. Hi Tom, This is great. Is there any way we can generate. Thanks in advance. I am runing 9. What happened? April 15, - am UTC. A reader, April 16, - pm UTC. April 16, - pm UTC. June 20, - pm UTC. I was missing oradba full permission on OS to do this.

Tom, I am facing a unique problem. When I run procedure through toad a file gets created on unix box with oracle as a owner. June 26, - pm UTC. A reader, August 18, - am UTC. Tom, would you happen to have a java equivalent of the dump csv procedure? September 04, - am UTC. October 24, - am UTC. This utility is really great. I have a small question.

November 14, - am UTC. This is really helpful. Wonderful code-but i got an error!! The code provided for creating CSV is perfect. March 03, - am UTC. It's good. But why I simply spool the resulted set into a text file instead of using utl tools???

If my sql include special characters, I have to do a lot of reformat job to replace ' with chr Tom: 1. I have an HTML page that displays a label for a user. User has a special label printer next to his PC that can only print from the printer editor software. I need to create a button on the web page, that creates a CSV or comma delimited file on the PC and then have the user run the label printer editor software and do an export from the file and then print the label.

Can I also control whether I want to add data to existing file add multiple addresses several time or re-write the file from scratch. May 11, - pm UTC. Tom: Can you elaborate more on what you mean. Do you mean dumping an oracle record data into a spreadsheet file on the client PC? What do you mean print it back to them? I already show them the address info on the web page using htp.

May 14, - am UTC. June 18, - pm UTC. June 22, - pm UTC. YES in easier in 9i, but doable before A reader, June 22, - pm UTC. A reader, July 11, - pm UTC. Is this true? July 11, - pm UTC. July 12, - am UTC. I just verified reading from and writing to a binary file I want to read a file stored on the server. But i dont know the OS of the server so i am not able to the correct path of the file when opening for reading it. July 13, - pm UTC. Here is a snippet of my login.

They also tried using the full path but still no success. Although they can open the above mentioned directories by mentioning the path on the OS level. Any ideas on how to resolve this issue. Oracle 9iR2 on Windows Advanced Server. Hope I have not made it sound complicated :D Thanks as always for your help. July 23, - am UTC. A reader, September 01, - pm UTC. Tom -- I was able to re-create your example. Thank you! However, I need this file to look like a report I know, I know, how stupid, but..

Please advise on how can I create a report heading for this file, have column headings, page numbers, etc. Is it possible? Please, advise.. September 01, - pm UTC. Tom, could you explain what forking means? September 15, - am UTC. File locks and pending signals are not inherited. I'm just trying to get the understanding, because we have a 3rd party app that is having problems connecting to the database after so many users are connected, and oracle support is saying that it is because they're forking.