--disable_warnings
DROP TABLE IF EXISTS graph_base;
DROP TABLE IF EXISTS graph;
--enable_warnings

# Create the backing store
CREATE TABLE graph_base (
    from_id INT UNSIGNED NOT NULL,
    to_id INT UNSIGNED NOT NULL,
    PRIMARY KEY (from_id,to_id),
    INDEX (to_id)
  ) ENGINE=MyISAM;


CREATE TABLE 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='graph_base' ORIGID='from_id', DESTID='to_id';


INSERT INTO graph_base(from_id, to_id) VALUES (1,2), (2,1);
INSERT INTO graph_base(from_id, to_id) VALUES (3,2), (2,3);
INSERT INTO graph_base(from_id, to_id) VALUES (1,3), (3,1);

# The following line crashes when MTR run with --gdb,  see bug https://bugs.launchpad.net/oqgraph/+bug/1233113
--error 1036
update graph set origid=123;

# Otherwise, MTR hangs on the next line
DROP TABLE graph_base;
DROP TABLE graph;