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Fixed a cost estimation bug introduced into in the function best_access_path

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of the 5.3 code line after a merge with 5.2 on 2010-10-28
in order not to allow the cost to access a joined table to be equal
to 0 ever.

Expanded data sets for many test cases to get the same execution plans
as before.
This commit is contained in:
Igor Babaev
2011-09-30 18:55:02 -07:00
parent 42b928ca05
commit 715dc5f99d
61 changed files with 703 additions and 217 deletions
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25
mysql-test/t/join_nested.test
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@@ -454,6 +454,7 @@ SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
ON t3.a=1 AND t2.b=t4.b
WHERE t1.a <= 2;
INSERT INTO t2 VALUES (-1,9,0), (-3,10,0), (-2,8,0), (-4,11,0), (-5,15,0);
CREATE INDEX idx_b ON t2(b);
EXPLAIN EXTENDED
@@ -461,12 +462,12 @@ SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM (t3,t4)
LEFT JOIN
(t1,t2)
ON t3.a=1 AND t3.b=t2.b AND t2.b=t4.b;
ON t3.a=1 AND t3.b=t2.b AND t2.b=t4.b AND t2.a>0;
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM (t3,t4)
LEFT JOIN
(t1,t2)
ON t3.a=1 AND t3.b=t2.b AND t2.b=t4.b;
ON t3.a=1 AND t3.b=t2.b AND t2.b=t4.b AND t2.a>0;
EXPLAIN EXTENDED
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
@@ -477,7 +478,7 @@ SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
ON t3.a=1 AND t2.b=t4.b AND t2.a>0,
t5
LEFT JOIN
(
@@ -504,6 +505,8 @@ SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
(t8.b=t9.b OR t8.c IS NULL) AND
(t9.a=1);
INSERT INTO t4 VALUES (-3,12,0), (-4,13,0), (-1,11,0), (-3,11,0), (-5,15,0);
INSERT INTO t5 VALUES (-3,11,0), (-2,12,0), (-3,13,0), (-4,12,0);
CREATE INDEX idx_b ON t4(b);
CREATE INDEX idx_b ON t5(b);
@@ -516,7 +519,7 @@ SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
ON t3.a=1 AND t2.b=t4.b AND t2.a>0 AND t4.a>0,
t5
LEFT JOIN
(
@@ -525,7 +528,7 @@ SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b
ON t6.b >= 2 AND t5.b=t7.b AND t5.a>0
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
@@ -543,6 +546,7 @@ SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
(t8.b=t9.b OR t8.c IS NULL) AND
(t9.a=1);
INSERT INTO t8 VALUES (-3,12,0), (-1,14,0), (-5,15,0), (-1,11,0), (-4,13,0);
CREATE INDEX idx_b ON t8(b);
EXPLAIN EXTENDED
@@ -554,16 +558,16 @@ SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
ON t3.a=1 AND t2.b=t4.b AND t2.a>0 AND t4.a>0,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
ON t7.b=t8.b AND t6.b < 10 AND t8.a>=0
)
ON t6.b >= 2 AND t5.b=t7.b
ON t6.b >= 2 AND t5.b=t7.b AND t5.a>0
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
@@ -581,6 +585,7 @@ SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
(t8.b=t9.b OR t8.c IS NULL) AND
(t9.a=1);
INSERT INTO t1 VALUES (-1,133,0), (-2,12,0), (-3,11,0), (-5,15,0);
CREATE INDEX idx_b ON t1(b);
CREATE INDEX idx_a ON t0(a);
@@ -606,7 +611,7 @@ SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
(t1.a != 2),
(t1.a != 2) AND t1.a>0,
t9
WHERE t0.a=1 AND
t0.b=t1.b AND
@@ -641,7 +646,7 @@ SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
(t1.a != 2),
(t1.a != 2) AND t1.a>0,
t9
WHERE t0.a=1 AND
t0.b=t1.b AND