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MySQL NDB Cluster API Developer Guide
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2.3.18.13 NdbBlob::getValue()

Description.  Use this method to prepare to read a blob value; the value is available following invocation. Use getNull() to check for a NULL value; use getLength() to get the actual length of the blob, and to check for truncation. getValue() sets the current read/write position to the point following the end of the data which was read.

Signature. 

int getValue
    (
      void*  data,
      Uint32 bytes
    )

Parameters.  This method takes two parameters. The first of these is a pointer to the data to be read; the second is the number of bytes to be read.

Return value.  0 on success, -1 on failure.


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