OCI-Lob->erase
(no version information, might be only in CVS)
OCI-Lob->erase -- Erases a specified portion of the internal LOB data说明
class OCI-Lob {int erase ( [int offset [, int length]] )
}
Erases a specified portion of the internal LOB data starting at a specified offset. Parameters length and offset are optional. OCI-Lob->erase() erases all LOB data by default.
For BLOBs, erasing means that the existing LOB value is overwritten with zero-bytes. For CLOBs, the existing LOB value is overwritten with spaces.
OCI-Lob->erase() returns the actual number of characters/bytes erased or FALSE in case of error.