MySQL :: MySQL Cluster API Developer Guide :: 2.3.31 The RecordSpecification Structure

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Parent class. NdbDictionary

Description. This structure is used to specify columns and range offsets when creating NdbRecord objects.

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`	`Column`	The column described by this entry (the column's maximum size defines the field size for the row). Even when creating an `NdbRecord` for an index, this must point to a column obtained from the underlying table, and not from the index itself.
`offset`	`Uint32`	The offset of data from the beginning of a row. For reading blobs, the blob handle (`NdbBlob`), rather than the actual blob data, is written into the row. This means that there must be at least `sizeof(NdbBlob*)` must be available in the row.
`nullbit_byte_offset`	`Uint32`	The offset from the beginning of the row of the byte containing the `NULL` bit.
`nullbit_bit_in_byte`	`Uint32`	`NULL` bit (0-7).

Important

nullbit_byte_offset and nullbit_bit_in_byte are not used for non-NULLable columns.