DELETE FROM BLOB
DELETE FROM BLOB ( blob ; offset ; len )
| Parameter | Type | Description | |
|---|---|---|---|
| blob | BLOB | 🡒 | BLOB from which to delete bytes |
| offset | Longint | 🡒 | Starting offset where bytes will be deleted |
| len | Longint | 🡒 | Number of bytes to be deleted |
Description
The DELETE FROM BLOB command deletes the number of bytes specified by len from the BLOB blob at the position specified by offset (expressed relative to the beginning of the BLOB). The BLOB then becomes len bytes smaller.
Note
Compatiblity note: Since this command alters the blob passed as a parameter, it does not support blob objects (4D.Blob type). See Passing blobs and blob objects to 4D commands on developer.4d.com.