How to install utl_file package in oracle

The latest recommendation is to use a directory object. A directory location is identified to Oracle and stored within the database. Users are then granted read or write on the directory. END IF;. Compiling this procedure and executing it…. The ability to write files out like this must be safeguarded. Imagine the damage a malicious - or not - user can wreak by being able to what amounts to download from the database any document. So just as potentially dangerous as writing files out to the file system, misuse of these two procedures, inadvertent or otherwise, can be disastrous.

Imagine someone playing "what if" with database files. This package was introduced in the Oracle version 7. The different objects available in this package are described below. This became a security threat as the directories present inside this parameter are accessible by any other database user. Either read or write access to the directories created using this syntax can be granted to individual users or roles.

The prototype for creating a directory is shown below,. The prototype for granting access to the directories to the database users is shown below,. Feel free to ask questions on our Oracle forum. You must know the number of bytes by which you want to navigate. If the beginning of the file is reached before the number of bytes specified, then the file pointer is placed at the beginning of the file. This procedure reads text from the open file identified by the file handle and places the text in the output buffer parameter.

Text is read up to, but not including, the line terminator, or up to the end of the file, or up to the end of the len parameter. The number of bytes read from the file. Default is NULL. Because the line terminator character is not read into the buffer, reading blank lines returns empty strings. With this function, you can read a text file in Unicode instead of in the database charset.

The file must be open for reading mode r. This function reads a RAW string value from a file and adjusts the file pointer ahead by the number of bytes read. This function tests a file handle to see if it identifies an open file. It does not guarantee that there will be no operating system errors when you attempt to use the file handle. This procedure writes one or more line terminators to the file identified by the input file handle.

This procedure is separate from PUT because the line terminator is a platform-specific character or sequence of characters. PUT writes the text string stored in the buffer parameter to the open file identified by the file handle. The file must be open for write operations. The file must be open for writing. The sum of all sequential PUT calls cannot exceed without intermediate buffer flushes.

This procedure writes the text string stored in the buffer parameter to the open file identified by the file handle. With this function, you can write a text file in Unicode instead of in the database charset. See also "PUT Procedure". This procedure is a formatted PUT procedure. It works like a limited printf. This function accepts as input a RAW data value and writes the value to the output buffer. You can request an automatic flush of the buffer by setting the third argument to TRUE.

Caution: The privileges needed to access files in a directory object are operating system specific. Attempting to apply invalid options will give rise to unpredictable results.

The default is 1 for the first line. NULL if file does not exist. NULL if the file does not exist. File could not be opened or operated on as requested. Operating system error occurred during the read operation. Operating system error occurred during the write operation. The requested operation failed because the file is open. Permission to access to the file location is denied. The requested file delete operation failed.

The requested file rename operation failed. Copies a contiguous portion of a file to a newly created file. Physically writes all pending output to a file. Reads and returns the attributes of a disk file.

Returns the current relative offset position within a file, in bytes. Opens a file in Unicode for input or output. Deletes a disk file, assuming that you have sufficient privileges. Renames an existing file to a new name, similar to the UNIX mv function.

Adjusts the file pointer forward or backward within the file by the number of bytes specified. Reads text in Unicode from an open file. Determines if a file handle refers to an open file. Writes one or more operating system-specific line terminators to a file.

PUT Procedure. Writes a line to a file, and so appends an operating system-specific line terminator. PUTF Procedure. A PUT procedure with formatting. Accepts as input a RAW data value and writes the value to the output buffer.