$BLOB function scans a directory for files content. It uses the content of one random file as a source. By default, it uses hexadecimal presentation but text format is also available. The function has one mandatory and one optional parameter:

1. Full path to source folder.
2. (optional) integer value. 1 means 'use text presentation of the content', 0 (default) - hexadecimal.

Example

$BLOB(d:\images)

Important: to create correct BLOB presentation the user has to add depended on the database prefix or quoting. There are samples:
\x'$BLOB(d:\images)' - for MySQL and SQLite database.
0\x$BLOB(d:\images) - for Microsoft SQL Server.
\X'$BLOB(d:\images)' or HEX('...') - for IBM DB2 database.
use TO_LOB conversion function in Oracle, etc.

Notes

1. .NET edition of the engine supports text presentation only
2. Java and Web edition of the engine do not support this function yet