EVOLUTION-MANAGER

Edit File: regression_1195735.test

# Regression test for https://bugs.launchpad.net/oqgraph/+bug/1195735
#--reproduce bug where select * from graph after delete from graph_base hangs the server
--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);

--echo One select of any clauses at all on graph here caused a hang on the select after the DELETE FROM
#-- even this if it is the only one - but it doesnt hang here ... SELECT * FROM graph;
SELECT * FROM graph WHERE destid=2 and origid=1;

DELETE FROM graph_base;
#-- Bug 1195735 hangs on the next line
SELECT * from graph;
FLUSH TABLES;
TRUNCATE TABLE graph_base;
DROP TABLE graph_base;
--error S42S02
SELECT * FROM graph WHERE latch='dijkstras' AND origid=1 AND destid=6;
DROP TABLE graph;