B4BY.588

: / usr / share / mysql-test / t /
Filename : join_nested_bka.test
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# 
# Run join_nested.test with BKA enabled 
#
set optimizer_switch='batched_key_access=on,mrr_cost_based=off';

--source t/join_nested.test

#
# BUG#35835: queries with nested outer joins with BKA enabled
#            

CREATE TABLE t5 (a int, b int, c int, PRIMARY KEY(a), KEY b_i (b));
CREATE TABLE t6 (a int, b int, c int, PRIMARY KEY(a), KEY b_i (b));
CREATE TABLE t7 (a int, b int, c int, PRIMARY KEY(a), KEY b_i (b));
CREATE TABLE t8 (a int, b int, c int, PRIMARY KEY(a), KEY b_i (b));

INSERT INTO t5 VALUES (1,1,0), (2,2,0), (3,3,0);
INSERT INTO t6 VALUES (1,2,0), (3,2,0), (6,1,0);
INSERT INTO t7 VALUES (1,1,0), (2,2,0);
INSERT INTO t8 VALUES (0,2,0), (1,2,0);

EXPLAIN
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
  FROM t5 
       LEFT JOIN 
       ( 
         (t6, t7)
         LEFT JOIN 
         t8
         ON t7.b=t8.b AND t6.b < 10
       )
       ON t6.b >= 2 AND t5.b=t7.b AND
          (t8.a > 0 OR t8.c IS NULL);

SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
  FROM t5 
       LEFT JOIN 
       ( 
         (t6, t7)
         LEFT JOIN 
         t8
         ON t7.b=t8.b AND t6.b < 10
       )
       ON t6.b >= 2 AND t5.b=t7.b AND
          (t8.a > 0 OR t8.c IS NULL);

DELETE FROM t5;
DELETE FROM t6;
DELETE FROM t7;
DELETE FROM t8;

INSERT INTO t5 VALUES (1,3,0), (3,2,0);
INSERT INTO t6 VALUES (3,3,0);
INSERT INTO t7 VALUES (1,2,0);
INSERT INTO t8 VALUES (1,1,0);

EXPLAIN
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
  FROM t5 LEFT JOIN                
       (t6 LEFT JOIN t7 ON t7.a=1, t8)
       ON (t5.b=t8.b);

SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
  FROM t5 LEFT JOIN                
       (t6 LEFT JOIN t7 ON t7.a=1, t8)
       ON (t5.b=t8.b);

EXPLAIN
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
  FROM t5 LEFT JOIN                
       (t6 LEFT JOIN t7 ON t7.b=2, t8)
       ON (t5.b=t8.b);

SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
  FROM t5 LEFT JOIN                
       (t6 LEFT JOIN t7 ON t7.b=2, t8)
       ON (t5.b=t8.b);

EXPLAIN
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
  FROM t5 LEFT JOIN                
       (t8, t6 LEFT JOIN t7 ON t7.a=1)
       ON (t5.b=t8.b);

SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
  FROM t5 LEFT JOIN                
       (t8, t6 LEFT JOIN t7 ON t7.a=1)
       ON (t5.b=t8.b);

DROP TABLE t5,t6,t7,t8;

set optimizer_switch=default;