Per-partition engine-defined attributes don't work for OQGraph

--source include/have_partition.inc

INSTALL SONAME 'ha_oqgraph';

CREATE TABLE oq_backing (

  origid INT UNSIGNED NOT NULL,

  destid INT UNSIGNED NOT NULL,

  PRIMARY KEY (origid, destid),

  KEY (destid)

);

INSERT INTO oq_backing (origid, destid) VALUES (1,2), (2,3), (3,4), (4,5), (2,6), (5,6);

CREATE TABLE oq_backing1 (

  origid INT UNSIGNED NOT NULL,

  destid INT UNSIGNED NOT NULL,

  PRIMARY KEY (origid, destid),

  KEY (destid)

);

INSERT INTO oq_backing1 (origid, destid) VALUES (11,12), (12,13), (13,14), (14,15), (12,16), (15,16);

CREATE TABLE oq_backing2 (

  origid INT UNSIGNED NOT NULL,

  destid INT UNSIGNED NOT NULL,

  PRIMARY KEY (origid, destid),

  KEY (destid)

);

INSERT INTO oq_backing2 (origid, destid) VALUES (21,22), (22,23), (23,24), (24,25), (22,26), (25,26);

CREATE TABLE oq_graph (

  latch VARCHAR(32) NULL,

  origid BIGINT UNSIGNED NULL,

  destid BIGINT UNSIGNED NULL,

  weight DOUBLE NULL,

  seq BIGINT UNSIGNED NULL,

  linkid BIGINT UNSIGNED NULL,

  KEY (latch, origid, destid) USING HASH,

  KEY (latch, destid, origid) USING HASH

)

ENGINE=OQGRAPH

data_table='oq_backing' origid='origid' destid='destid'

PARTITION BY RANGE (origid) (

  PARTITION p0 VALUES LESS THAN (20) data_table='oq_backing1' origid='origid' destid='destid',

  PARTITION p1 VALUES LESS THAN (30) data_table='oq_backing2' origid='origid' destid='destid'

);

SELECT * FROM oq_graph;

DROP TABLE IF EXISTS oq_backing, oq_backing1, oq_backing2, oq_graph;

UNINSTALL SONAME 'ha_oqgraph';

SELECT * FROM oq_graph;

latch	origid	destid	weight	seq	linkid

NULL	1	2	1	NULL	NULL

NULL	2	3	1	NULL	NULL

NULL	3	4	1	NULL	NULL

NULL	4	5	1	NULL	NULL

NULL	2	6	1	NULL	NULL

NULL	5	6	1	NULL	NULL

NULL	1	2	1	NULL	NULL

NULL	2	3	1	NULL	NULL

NULL	3	4	1	NULL	NULL

NULL	4	5	1	NULL	NULL

NULL	2	6	1	NULL	NULL

NULL	5	6	1	NULL	NULL