Use the fetch_block API method to produce data.
Option | Description |
---|---|
null_value | Indicates the value is used to indicate NULL |
null_mask | Identifies the bits that represent the NULL value. |
is_null | If the value is NULL, set is_null to a value such that (*(cd->is_null) & cd->null_mask) == cd->null_value ). |
data | Set this pointer to the area in the producer's memory containing the data to be returned. |
piece_len | The actual length of data being returned. For fixed-length data types, this cannot exceed max_piece_len. This value defaults to max_piece_len for fixed data types. |