Hi, I'm trying to create a file from another file through a procedure,after reading the input file, i want to create another file where i. I need to in import a csv file to a existed database table everyday. From the first time, I’m using your suggested way is good, however, when I need to import another csv file into a same table, I have a question.
- 224 UTL_FILE. With the UTL_FILE package, PL/SQL programs can read and write operating system text files. UTL_FILE provides a restricted version of operating system stream file I/O. This chapter contains the following topics.
- 6.2 UTL_FILE: Reading and Writing Server-side Files. UTL_FILE is a package that has been welcomed warmly by PL/SQL developers. It allows PL/SQL programs to both read from and write to any operating system files that are.
- Articles and utilities for Oracle developers. tuning pl/sql file i/o. Unloading Oracle data to flat-files is still very common. There are numerous 'unloader' utilities on the web for this purpose and there are also many.
- Hi Tom, Here I am again. My question is- Can I CC (carbon Copy) an email using UTL_SMTP in 10g? I was able to send email to multiple recepients by looping through the UTL_SMTP.RCPT() function. But is there a way to CC an email.
- How to use put function.my procedure is not compiling with put. but putline is working fine. i want to print in the same line.
- Need help on creating text file using stored procedure in oracle 10. I'm very new to this so please guide me from the start. I found code and created it as stored procedure. I run it and it is VAL.
- Ex amples. Example 1. This example reads from a file using the GET_LINE procedure. DECLARE V1 VARCHAR2(32767); F1 UTL_FILE.FILE_TYPE; BEGIN -- In this example MAX_LINESIZE is less than GET_LINE's length request -- so number.
Reading and Writing Server- side Files. UTL_FILE is a package that has been welcomed warmly by PL/SQL developers. It allows PL/SQL programs to both read from and write to any operating system files that are accessible from the server on which your database instance is running. File I/O was a feature long desired in PL/SQL, but available only with PL/SQL Release 2.
Oracle 7. 3 or Oracle 8. You can now read. You can load data from files directly into database tables while applying the full power and flexibility of PL/SQL programming. You can generate reports directly from within PL/SQL without worrying about the maximum buffer restrictions of DBMS_OUTPUT. UTL_FILE package is created when the Oracle database is installed. The. utlfile. sql script (found in the built- in packages source code directory, as described in.
This script is called by. The script creates the public synonym UTL_FILE for the package and grants EXECUTE. All Oracle users can reference and make use of this package. UTL_FILE program names and descriptions. Closes the specified files.
Closes all open files. Flushes all the data from the UTL_FILE buffer. Opens the specified file. Gets the next line from the file.
Returns TRUE if the file is already open. Inserts a newline mark in the file at the end of the current line. Puts text into the buffer. Puts a line of text into the file. Puts formatted text into the buffer.
Just getting to the point where your first call to UTL_FILE's FOPEN function works can actually be a pretty frustrating experience. Here's how it usually goes. You read about UTL_FILE and you are excited. So you dash headlong into writing some code like this. UTL_FILE. FILE_TYPE. UTL_FILE. FOPEN ('/tmp', 'newdata. W'). .. lots of write operations ..
SQL*Plus. SQL> @writefile. ERROR at line 1. ORA- 0.
PL/SQL: unhandled user- defined exception. ORA- 0. 65. 12: at "SYS. UTL_FILE", line 9. ORA- 0. 65. 12: at "SYS. UTL_FILE", line 1. ORA- 0. 65. 12: at line 4. What is going wrong?
This error message certainly provides little or no useful information. So you go back to the documentation, thoroughly chastened, and (over time) discover the following. You need to modify the INIT. ORA parameter initialization file of your instance. You will have to contact your database administrator and have him or her make the changes (if willing) and then "bounce" the database. You need to get the format of the parameter entries correct. That alone used to take me days!
You need to add exception sections to your programs to give yourself a fighting chance at figuring out what is going on. I hope that the information in this chapter will help you avoid most, if not all, of these frustrations and gotchas.
But don't give up! This package is well worth the. UTL_FILE lets you read and write files accessible from the server on which your database is running. So you could theoretically use UTL_FILE to write right over your tablespace data files, control files, and so on.
That is of course a very bad idea. Server security requires the ability to place restrictions on where you can read and write your files. UTL_FILE implements this security by limiting access to files that reside in one of the directories specified in the INIT. ORA file for the database instance on which UTL_FILE is running. When you call FOPEN to open a file, you must specify both the location and the name of the file, in separate arguments. This file location is then checked against the list of accessible directories.
Here's the format of the parameter for file access in the INIT. ORA file. utl_file_dir = < directory>.
Include a parameter for utl_file_dir for each directory you want to make accessible for UTL_FILE operations. The following entries, for example, enable four different directories in UNIX. To bypass server security and allow read/write access to all directories, you can use this special syntax.
You should not use this option on production systems. In a development system, this entry certainly makes it easier for developers to get up and running on UTL_FILE and test their code. However, you should allow access to only a few specific directories when you move the application to production. Some observations on working with and setting up accessible directories with UTL_FILE follow. Access is not recursive through subdirectories. If the following lines were in your INIT.
ORA file, for example. Do not include the following entry in UNIX systems. This would allow you to read/write on the current directory in the operating system. Do not enclose the directory names within single or double quotes. In the UNIX environment, a file created by FOPEN has as its owner the shadow process running the Oracle instance. This is usually the "oracle" owner.
If you try to access these files outside of UTL_FILE, you will need the correct. You should not end your directory name with a delimiter, such as the forward slash in UNIX. The following specification of a directory will result in problems when trying to read from or write to the. The location of the file is an operating system- specific string that specifies the directory or area in which to open the file. The location you provide must have been listed as an accessible directory in the INIT. ORA file for the database instance.
The INIT. ORA location is a valid directory or area specification, as shown in these examples. Notice that in Windows NT, the backslash character (\) is used as a delimiter.
In UNIX, the forward slash (/) is the delimiter. When you pass the location in the call to UTL_FILE. FOPEN, you provide the location specification as it appears in the INIT. ORA file (unless you just provided * for all directories in the initialization file). And remember that in case- sensitive operating systems, the case of the location specification in the initialization file must match that used in the call to UTL_FILE. FOPEN. Here are some examples.
UTL_FILE. FOPEN ('k: \common\debug', 'trace. R'). file_id : = UTL_FILE. FOPEN ('/usr/od. 20. W'). Your location must be an explicit, complete path to the file.
You cannot use operating system- specific parameters such as environment variables in UNIX to specify file. The package specification of UTL_FILE defines seven exceptions.
The cause behind a UTL_FILE exception can often be difficult to understand. Here are the explanations Oracle provides for each of the exceptions. As a result of the way these exceptions are declared (as "user- defined exceptions"), there is no error number associated with any of the exceptions. Thus you must include explicit exception handlers in programs that call UTL_FILE if you wish to find out which error was raised. See the section. Section 6.
Handling file I/O errors". The file location or the filename is invalid. Perhaps the directory is not listed as a utl_file_dir parameter in the INIT. ORA file (or doesn't exist as all), or you are trying to read a file and it does not exist. The value you provided for the open_mode parameter in UTL_FILE. FOPEN was invalid.
It must be "A," "R," or "W.". INVALID_FILEHANDLE. The file handle you passed to a UTL_FILE program was invalid. You must call UTL_FILE.
FOPEN to obtain a valid file handle. INVALID_OPERATION. UTL_FILE could not open or operate on the file as requested. For example, if you try to write to a read- only file, you will raise this exception. The operating system returned an error when you tried to read from the file. This does not occur very often.). The operating system returned an error when you tried to write to the file.
This does not occur very often.). Uh- oh. Something went wrong and the PL/SQL runtime engine couldn't assign blame to any of the previous exceptions. Better call Oracle Support!
Programs in UTL_FILE may also raise the following standard system exceptions. Raised when you read past the end of the file with UTL_FILE. GET_LINE. Raised when you try to read or write lines in the file which are too long. The current implementation of UTL_FILE limits the size of a line read by UTL_FILE. GET_LINE to 1. 02. INVALID_MAXLINESIZE. Oracle 8. 0 and above: raised when you try to open a file with a maximum linesize outside of the valid range (between 1 through 3.
In the following descriptions of the UTL_FILE programs, I list the exceptions that can be raised by each individual. When you open a file, PL/SQL returns a handle to that file for use within your program. This handle has a datatype of UTL_FILE.
FILE_TYPE currently defined as the following. TYPE UTL_FILE. FILE_TYPE IS RECORD (id BINARY_INTEGER). As you can see, UTL_FILE. FILE_TYPE is actually a PL/SQL record whose fields contain all the information about the file needed by UTL_FILE. However, this information is for use only by the UTL_FILE package. You will reference the handle, but not any of the individual fields of the handle. The fields of this record may expand over time as UTL_FILE becomes more sophisticated.).
Here is an example of how to declare a local file handle based on this type. UTL_FILE. FILE_TYPE. While UTL_FILE certainly extends the usefulness of PL/SQL, it does have its drawbacks, including. Prior to Oracle 8. In Oracle 8. 0 and above, you can specify a maximum line size of up to 3. You cannot delete files through UTL_FILE. The best you can do is.
You cannot rename files. The best you can do is copy the contents of the file to another file with that new name. You do not have random access to lines in a file.
If you want to read the 5. If you want to insert a line of text between the 1,2. Ugh. You cannot change the security on files through UTL_FILE. You cannot access mapped files. Generally, you will need to supply real directory locations for files if you want to read from or write to them. You are probably getting the idea. UTL_FILE is a basic facility for reading and writing server- side files.
Working with UTL_FILE is not always pretty, but you can usually get what you need done with a little or a lot of code. The following sections describe each of the UTL_FILE programs, following the process flow for working with files. That flow is described for both writing and reading files.