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Merge branch '10.6' into 10.7
This commit is contained in:
Oleksandr Byelkin
@ -1,4 +1,3 @@
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drop table if exists t1, t2;
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select 1 in (1,2,3);
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1 in (1,2,3)
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1
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@ -553,7 +552,7 @@ Warning 1292 Truncated incorrect DECIMAL value: 'a'
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Warning 1292 Truncated incorrect DECIMAL value: 'b'
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explain select f2 from t2 where f2 in ('a','b');
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 range t2f2 t2f2 5 NULL 1 Using where; Using index
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1 SIMPLE t2 ref t2f2 t2f2 5 const 1 Using index
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Warnings:
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Warning 1292 Truncated incorrect DECIMAL value: 'a'
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Warning 1292 Truncated incorrect DECIMAL value: 'b'
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@ -935,3 +934,228 @@ Warning 1292 Truncated incorrect DECIMAL value: '0x'
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#
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# End of 10.4 tests
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#
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#
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# MDEV-29662 same values in `IN` set vs equal comparison produces
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# the different performance
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#
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CREATE TABLE t1 (a INT, PRIMARY KEY(a));
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INSERT INTO t1 VALUES (1),(2),(3);
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SELECT * FROM t1 WHERE a IN (1,1);
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a
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1
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# 'const' access since 'a IN (1,1)' is converted to equality 'a=1'
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EXPLAIN SELECT * FROM t1 WHERE a IN (1,1);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 Using index
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EXPLAIN SELECT * FROM t1 WHERE a = 1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 Using index
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SELECT * FROM t1 WHERE a IN (1,1,2);
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a
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1
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2
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# Conversion to equality is impossible due to different values
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EXPLAIN SELECT * FROM t1 WHERE a IN (1,1,2);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 2 Using where; Using index
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SELECT * FROM t1 WHERE a IN (1,NULL,1);
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a
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1
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# Conversion to equality is impossible due to NULL in the IN list
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EXPLAIN SELECT * FROM t1 WHERE a IN (1,NULL,1);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 1 Using where; Using index
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SELECT * FROM t1 WHERE a NOT IN (2,2,2,2,2,2);
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a
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1
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3
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EXPLAIN SELECT * FROM t1 WHERE a NOT IN (2,2,2,2,2,2);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 3 Using where; Using index
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EXPLAIN SELECT * FROM t1 WHERE a != 3;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 3 Using where; Using index
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SELECT * FROM t1 WHERE a NOT IN (3,3,1,1);
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a
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2
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EXPLAIN SELECT * FROM t1 WHERE a NOT IN (3,3,1,1);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 3 Using where; Using index
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SELECT * FROM t1 WHERE a NOT IN (1,2,NULL,NULL);
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a
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# No conversion is possible since elements are not constant
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SELECT * FROM t1 WHERE a IN ((SELECT MAX(a) FROM t1), (SELECT MAX(a) FROM t1));
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a
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3
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EXPLAIN SELECT * FROM t1 WHERE a IN
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((SELECT MAX(a) FROM t1), (SELECT MAX(a) FROM t1));
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 range PRIMARY PRIMARY 4 NULL 1 Using where; Using index
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3 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
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2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
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# There must be no conversion here:
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SELECT * FROM t1 WHERE a IN (3,2,3,3,1,2,3);
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a
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1
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2
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3
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# Prepared statement
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PREPARE stmt FROM "SELECT * FROM t1 WHERE a IN (3,3,3)";
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EXECUTE stmt;
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a
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3
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EXECUTE stmt;
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a
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3
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DEALLOCATE PREPARE stmt;
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# Conversion to equality since SELECT 2 is evaluated as const
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SELECT * FROM t1 WHERE a IN ((SELECT 2), (SELECT 2));
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a
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2
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EXPLAIN SELECT * FROM t1 WHERE a IN ((SELECT 2), (SELECT 2));
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 Using index
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CREATE TABLE t2 (a INT, b VARCHAR(10), PRIMARY KEY(a,b));
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INSERT INTO t2 VALUES (1,'abc'),(2,'def'),(3,'ghi');
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SELECT * FROM t2 WHERE (a,b) IN ((1,'abc'),(1,'abc'));
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a b
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1 abc
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# 'const' access due to conversion to equality
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EXPLAIN SELECT * FROM t2 WHERE (a,b) IN ((1,'abc'),(1,'abc'));
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 const PRIMARY PRIMARY 16 const,const 1 Using index
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SELECT * FROM t2 WHERE (a,b) IN ((2,'def'),(2,'def'),(2,'XYZ'));
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a b
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2 def
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# No conversion due to different values
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EXPLAIN SELECT * FROM t2 WHERE (a,b) IN ((2,'def'),(2,'def'),(2,'XYZ'));
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 range PRIMARY PRIMARY 16 NULL 2 Using where; Using index
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SELECT * FROM t2 WHERE (a,b) IN ((2,'def'),(2,'def'),(2,NULL));
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a b
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2 def
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# No conversion due to NULL
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EXPLAIN SELECT * FROM t2 WHERE (a,b) IN ((2,'def'),(2,'def'),(2,NULL));
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 range PRIMARY PRIMARY 16 NULL 1 Using where; Using index
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SELECT * FROM t2 WHERE (a,b) NOT IN ((2,'def'),(2,'def'),(2,NULL));
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a b
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1 abc
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3 ghi
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SELECT * FROM t2 WHERE a IN (1,1,1,1);
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a b
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1 abc
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EXPLAIN SELECT * FROM t2 WHERE a IN (1,1,1,1);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 ref PRIMARY PRIMARY 4 const 1 Using index
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EXPLAIN SELECT * FROM t2 WHERE a = 1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 ref PRIMARY PRIMARY 4 const 1 Using index
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SELECT * FROM t2 WHERE b NOT IN ('abc','abc');
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a b
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2 def
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3 ghi
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EXPLAIN SELECT * FROM t2 WHERE b NOT IN ('abc','abc');
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 index NULL PRIMARY 16 NULL 3 Using where; Using index
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EXPLAIN SELECT * FROM t2 WHERE b != 'abc';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 index NULL PRIMARY 16 NULL 3 Using where; Using index
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# Prepared statements
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PREPARE stmt FROM "EXPLAIN SELECT * FROM t2 WHERE (a,b) IN ((1,'abc'),(1,'abc'))";
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EXECUTE stmt;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 const PRIMARY PRIMARY 16 const,const 1 Using index
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EXECUTE stmt;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 const PRIMARY PRIMARY 16 const,const 1 Using index
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DEALLOCATE PREPARE stmt;
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CREATE TABLE t3(a INT, PRIMARY KEY(a));
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INSERT INTO t3 VALUES (1),(2),(3);
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PREPARE stmt FROM "EXPLAIN SELECT * FROM t3 WHERE a IN (?,?,?)";
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EXECUTE stmt USING 1,1,1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t3 const PRIMARY PRIMARY 4 const 1 Using index
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EXECUTE stmt USING 2,3,4;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t3 range PRIMARY PRIMARY 4 NULL 3 Using where; Using index
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DEALLOCATE PREPARE stmt;
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DROP TABLE t1, t2, t3;
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# Nested joins
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CREATE TABLE t1 (a INT, b VARCHAR(10), PRIMARY KEY(a));
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INSERT INTO t1 VALUES (1,'abc'),(2,'def'),(3,'ghi');
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CREATE TABLE t2 (a INT, b VARCHAR(20), PRIMARY KEY(a));
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INSERT INTO t2 (a) VALUES (2),(3);
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CREATE TABLE t3 (a INT, PRIMARY KEY(a));
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INSERT INTO t3 VALUES (1),(2),(3),(4);
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CREATE TABLE t4 (a INT);
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INSERT INTO t4 VALUES (2),(3);
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# Conversion to equalities
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EXPLAIN SELECT * FROM (t1,t2) LEFT JOIN (t3,t4) ON t1.a IN (2,2,2)
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AND t3.a IN (1,1,1);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 ALL NULL NULL NULL NULL 2
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1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
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1 SIMPLE t3 const PRIMARY PRIMARY 4 const 1 Using where; Using index
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1 SIMPLE t4 ALL NULL NULL NULL NULL 2
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# No conversion to equalities due to different values in IN()
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EXPLAIN SELECT * FROM (t1,t2) LEFT JOIN (t3,t4) ON t1.a IN (2,3)
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AND t3.a IN (1,2);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 ALL NULL NULL NULL NULL 2
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1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
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1 SIMPLE t3 range PRIMARY PRIMARY 4 NULL 2 Using where; Using index; Using join buffer (incremental, BNL join)
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1 SIMPLE t4 ALL NULL NULL NULL NULL 2 Using join buffer (incremental, BNL join)
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# Conversion to equalities
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EXPLAIN SELECT * FROM t1 LEFT JOIN ((t2, t3) LEFT JOIN t4 ON t2.a = t4.a)
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ON t1.a = t2.a WHERE t1.a IN (2,2,2);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1
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1 SIMPLE t2 const PRIMARY PRIMARY 4 const 1
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1 SIMPLE t4 ALL NULL NULL NULL NULL 2 Using where
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1 SIMPLE t3 index NULL PRIMARY 4 NULL 4 Using index
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# No conversion to equalities due to different values in IN()
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EXPLAIN SELECT * FROM t1 LEFT JOIN ((t2, t3) LEFT JOIN t4 ON t2.a = t4.a)
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ON t1.a = t2.a WHERE t1.a IN (1,3);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 2 Using index condition
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1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1
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1 SIMPLE t4 ALL NULL NULL NULL NULL 2 Using where
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1 SIMPLE t3 index NULL PRIMARY 4 NULL 4 Using index
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# View
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CREATE VIEW v1 AS SELECT t1.*, t2.b AS t2_b FROM t1 LEFT JOIN t2
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ON t1.a = t2.a;
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EXPLAIN SELECT * FROM v1 WHERE a IN (2,2,2);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1
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1 SIMPLE t2 const PRIMARY PRIMARY 4 const 1
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EXPLAIN SELECT * FROM v1 WHERE a IN (1,2,3);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 3 Using index condition
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1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1
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# Stored procedures
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CREATE PROCEDURE p1(pa INT, pb INT)
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EXPLAIN SELECT * FROM t1 WHERE a IN (pa, pb);
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CALL p1(1,1);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1
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CALL p1(2,1);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 2 Using index condition
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DROP TABLE t1, t2, t3, t4;
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DROP VIEW v1;
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DROP PROCEDURE p1;
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#
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# MDEV-29895 prepared view crash server (unit.conc_view)
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#
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create table t1 (username varchar(12) not null, id int(11) not null);
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create view v1 as select username from t1 where id = 0;
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prepare stmt from "select username from v1 where username in (?, ?)";
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execute stmt using "1", "1";
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username
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deallocate prepare stmt;
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drop view v1;
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drop table t1;
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#
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# End of 10.6 tests
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#
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