Function aoco_relation_copy_data

src/backend/access/aocs/aocsam_handler.c:1390–1434

}

static void
aoco_relation_copy_data(Relation rel, const RelFileNode *newrnode)
{
	SMgrRelation dstrel;

	/*
	 * Use the "AO-specific" (non-shared buffers backed storage) SMGR
	 * implementation
	 */
	dstrel = smgropen(*newrnode, rel->rd_backend, SMGR_AO, rel);
	RelationOpenSmgr(rel);

	/*
	 * Create and copy all forks of the relation, and schedule unlinking of
	 * old physical files.
	 *
	 * NOTE: any conflict in relfilenode value will be caught in
	 * RelationCreateStorage().
	 */
	RelationCreateStorage(*newrnode, rel->rd_rel->relpersistence, SMGR_AO, rel);

	copy_append_only_data(rel->rd_node, *newrnode, rel->rd_smgr, dstrel, rel->rd_backend, rel->rd_rel->relpersistence);

	/*
	 * For append-optimized tables, no forks other than the main fork should
	 * exist with the exception of unlogged tables.  For unlogged AO tables,
	 * INIT_FORK must exist.
	 */
	if (rel->rd_rel->relpersistence == RELPERSISTENCE_UNLOGGED)
	{
		Assert (smgrexists(rel->rd_smgr, INIT_FORKNUM));

		/*
		 * INIT_FORK is empty, creating it is sufficient, no need to copy
		 * contents from source to destination.
		 */
		smgrcreate(dstrel, INIT_FORKNUM, false);

		log_smgrcreate(newrnode, INIT_FORKNUM, SMGR_AO);
	}

	/* drop old relation, and close new one */
	RelationDropStorage(rel);
	smgrclose(dstrel);
}

static void
aoco_vacuum_rel(Relation onerel, VacuumParams *params,