Function insert_key

src/jrd/idx.cpp:2086–2141

static idx_e insert_key(thread_db* tdbb,
						jrd_rel* relation,
						Record* record,
						jrd_tra* transaction,
						WIN * window_ptr,
						index_insertion* insertion,
						IndexErrorContext& context)
{
/**************************************
 *
 *	i n s e r t _ k e y
 *
 **************************************
 *
 * Functional description
 *	Insert a key in the index.
 *	If this is a unique index, check for active duplicates.
 *	If this is a foreign key, check for duplicates in the
 *	primary key index.
 *
 **************************************/
	SET_TDBB(tdbb);

	idx_e result = idx_e_ok;
	index_desc* idx = insertion->iib_descriptor;

	// Insert the key into the index.  If the index is unique, btr will keep track of duplicates.

	insertion->iib_duplicates = NULL;
	BTR_insert(tdbb, window_ptr, insertion);

	if (insertion->iib_duplicates)
	{
		result = check_duplicates(tdbb, record, idx, insertion, NULL);
		delete insertion->iib_duplicates;
		insertion->iib_duplicates = 0;
	}

	if (result != idx_e_ok)
		return result;

	// if we are dealing with a foreign key index,
	// check for an insert into the corresponding primary key index
	if (idx->idx_flags & idx_foreign)
	{
		// Find out if there is a null segment. If there is one,
		// don't bother to check the primary key.
		if (result == idx_e_ok && insertion->iib_key->key_nulls == 0)
		{
			result = check_foreign_key(tdbb, record, insertion->iib_relation,
									   transaction, idx, context);
		}
	}

	return result;
}