Parent class.
NdbOperation
Description.
This structure is used to specify an extra value to obtain as part
of an NdbRecord operation.
Members. The makeup of this structure is shown here:
The individual members are described in more detail in the following table:
| Name | Type | Description |
|---|---|---|
column |
const |
To specify an extra value to read, the caller must provide this, as well
as (optionally NULL)
appStorage pointer. |
appStorage |
void* |
If this pointer is null, then the received value is stored in memory
managed by the NdbRecAttr
object. Otherwise, the received value is stored at the
location pointed to (and is still accessable using the
NdbRecAttr object).
Important It is the caller's responsibility to ensure that the following conditions are met:
|
recAttr |
NdbRecAttr* |
After the operation is defined, recAttr
contains a pointer to the
NdbRecAttr object for
receiving the data. |
Currently, blob reads cannot be specified using
GetValueSpec.
For more information, see Section 2.3.25, “The NdbRecord Interface”.
