Description

Erases a specified portion of the internal LOB data starting at a specified offset. Parameters length and offset are optional. 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.

lob->erase() returns the actual number of characters/bytes erased or FALSE in case of error.