QdbBlobCompareAndSwap Method

Atomically compares and replaces the content when it matches.

Namespace: Quasardb
Assembly: Quasardb (in Quasardb.dll) Version: 3.15.0.0 (3.15.0.0)

Syntax

public byte[] CompareAndSwap(
	byte[] content,
	byte[] comparand,
	DateTime? expiryTime = null
)

Public Function CompareAndSwap ( 
	content As Byte(),
	comparand As Byte(),
	Optional expiryTime As DateTime? = Nothing
) As Byte()

content: Type: SystemByte
The new content to put in the blob.
comparand: Type: SystemByte
The content to be compared to.
expiryTime (Optional): Type: SystemNullableDateTime
The expiry time to set if the blob's content is replaced.

Type: Byte
The previous content of the blob if it didn't match; null if it matched.

Exceptions

Exception	Condition
QdbAliasNotFoundException	The blob is not present in the database.
QdbIncompatibleTypeException	The database entry is not a blob.

QdbBlobAddLanguageSpecificTextSet("LSTA3602023_0?cpp=::|nu=.");CompareAndSwap Method