Oracle® Objects for OLE C++ Class Library Developer's Guide 10g Release 2 (10.2) Part Number B14308-01 |
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Applies To
Description
Erases the specified portion of the LOB value of this object starting at the specified offset.
Usage
void Erase(unsigned long amount, unsigned long offset) const throw(OException)
Arguments
Arguments |
Description |
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amount |
An integer specifying the maximum number of characters or bytes to be erased. |
offset |
An integer specifying absolute offset of the LOB value from which to start erasing. Default value is 1. |
Either a row-level lock or object-level lock should be obtained before calling this method. The actual number of characters/bytes and the requested number of characters/bytes will differ if the end of the LOB value is reached before erasing the requested number of characters/bytes. For OBlobs, erasing means that zeroes are used to overwrite the existing LOB value. For OClobs, erasing means that spaces overwrite the existing LOB value.