--source include/have_innodb.inc

########################################################################
# Bug #857590: Fast index creation does not update index statistics
########################################################################

CREATE TABLE t1(
       id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
       a CHAR(1) NOT NULL,
       b CHAR(36) NOT NULL) ENGINE=InnoDB;

INSERT INTO t1(a,b) VALUES ('a','b');
INSERT INTO t1(a,b) SELECT a,b FROM t1;
INSERT INTO t1(a,b) SELECT a,b FROM t1;
INSERT INTO t1(a,b) SELECT a,b FROM t1;
INSERT INTO t1(a,b) SELECT a,b FROM t1;

# Check that fast index creation is used
--enable_info
ALTER TABLE t1 ADD KEY (a);
--disable_info

# The default (wrong) plan due to bogus statistics
--vertical_results
EXPLAIN SELECT COUNT(*) FROM t1, t1 t2 WHERE t1.a = t2.a AND t1.b = t2.b;
--horizontal_results

ALTER TABLE t1 DROP KEY a;

SET expand_fast_index_creation = 1;
SELECT @@expand_fast_index_creation;

# Check that stats are updated with the option enabled

--enable_info
ALTER TABLE t1 ADD KEY (a);
--disable_info

--vertical_results
EXPLAIN SELECT COUNT(*) FROM t1, t1 t2 WHERE t1.a = t2.a AND t1.b = t2.b;
--horizontal_results

SET expand_fast_index_creation = 0;

DROP TABLE t1;
