FrozenTransactionId : HeapTupleHeaderGetRawXmin()

in src/postgres/include/access/htup_details.h [310:396]

• 61 lines of code
• 5 McCabe index (conditional complexity)

		FrozenTransactionId : HeapTupleHeaderGetRawXmin(tup) \
)

#define HeapTupleHeaderSetXmin(tup, xid) \
( \
	(tup)->t_choice.t_heap.t_xmin = (xid) \
)

#define HeapTupleHeaderXminCommitted(tup) \
( \
	((tup)->t_infomask & HEAP_XMIN_COMMITTED) != 0 \
)

#define HeapTupleHeaderXminInvalid(tup) \
( \
	((tup)->t_infomask & (HEAP_XMIN_COMMITTED|HEAP_XMIN_INVALID)) == \
		HEAP_XMIN_INVALID \
)

#define HeapTupleHeaderXminFrozen(tup) \
( \
	((tup)->t_infomask & (HEAP_XMIN_FROZEN)) == HEAP_XMIN_FROZEN \
)

#define HeapTupleHeaderSetXminCommitted(tup) \
( \
	AssertMacro(!HeapTupleHeaderXminInvalid(tup)), \
	((tup)->t_infomask |= HEAP_XMIN_COMMITTED) \
)

#define HeapTupleHeaderSetXminInvalid(tup) \
( \
	AssertMacro(!HeapTupleHeaderXminCommitted(tup)), \
	((tup)->t_infomask |= HEAP_XMIN_INVALID) \
)

#define HeapTupleHeaderSetXminFrozen(tup) \
( \
	AssertMacro(!HeapTupleHeaderXminInvalid(tup)), \
	((tup)->t_infomask |= HEAP_XMIN_FROZEN) \
)

/*
 * HeapTupleHeaderGetRawXmax gets you the raw Xmax field.  To find out the Xid
 * that updated a tuple, you might need to resolve the MultiXactId if certain
 * bits are set.  HeapTupleHeaderGetUpdateXid checks those bits and takes care
 * to resolve the MultiXactId if necessary.  This might involve multixact I/O,
 * so it should only be used if absolutely necessary.
 */
#define HeapTupleHeaderGetUpdateXid(tup) \
( \
	(!((tup)->t_infomask & HEAP_XMAX_INVALID) && \
	 ((tup)->t_infomask & HEAP_XMAX_IS_MULTI) && \
	 !((tup)->t_infomask & HEAP_XMAX_LOCK_ONLY)) ? \
		HeapTupleGetUpdateXid(tup) \
	: \
		HeapTupleHeaderGetRawXmax(tup) \
)

#define HeapTupleHeaderGetRawXmax(tup) \
( \
	(tup)->t_choice.t_heap.t_xmax \
)

#define HeapTupleHeaderSetXmax(tup, xid) \
( \
	(tup)->t_choice.t_heap.t_xmax = (xid) \
)

/*
 * HeapTupleHeaderGetRawCommandId will give you what's in the header whether
 * it is useful or not.  Most code should use HeapTupleHeaderGetCmin or
 * HeapTupleHeaderGetCmax instead, but note that those Assert that you can
 * get a legitimate result, ie you are in the originating transaction!
 */
#define HeapTupleHeaderGetRawCommandId(tup) \
( \
	(tup)->t_choice.t_heap.t_field3.t_cid \
)

/* SetCmin is reasonably simple since we never need a combo CID */
#define HeapTupleHeaderSetCmin(tup, cid) \
do { \
	Assert(!((tup)->t_infomask & HEAP_MOVED)); \
	(tup)->t_choice.t_heap.t_field3.t_cid = (cid); \
	(tup)->t_infomask &= ~HEAP_COMBOCID; \
} while (0)