ArrowArrayStream Struct Reference

Data Fields
int(*	get_schema )(struct ArrowArrayStream *, struct ArrowSchema *out)
int(*	get_next )(struct ArrowArrayStream *, struct ArrowArray *out)
const char *(*	get_last_error )(struct ArrowArrayStream *)
void(*	release )(struct ArrowArrayStream *)
void *	private_data
	Opaque producer-specific data.

Field Documentation

const char*(* ArrowArrayStream::get_last_error)(struct ArrowArrayStream *)

Callback to get optional detailed error information. This must only be called if the last stream operation failed with a non-0 return code.

Returns

pointer to a null-terminated character array describing the last error, or NULL if no description is available.

The returned pointer is only valid until the next operation on this stream (including release).

int(* ArrowArrayStream::get_next)(struct ArrowArrayStream *, struct ArrowArray *out)

Callback to get the next array (if no error and the array is released, the stream has ended)

Returns

0 if successful, an errno-compatible error code otherwise.

If successful, the ArrowArray must be released independently from the stream.

int(* ArrowArrayStream::get_schema)(struct ArrowArrayStream *, struct ArrowSchema *out)

Callback to get the stream type (will be the same for all arrays in the stream).

Returns

0 if successful, an errno-compatible error code otherwise.

If successful, the ArrowSchema must be released independently from the stream.

void(* ArrowArrayStream::release)(struct ArrowArrayStream *)

Release callback: release the stream's own resources. Note that arrays returned by get_next must be individually released.

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The documentation for this struct was generated from the following file:

• qdb/arrow_abi.h