Adding upstream version 1:10.11.6.upstream/1%10.11.6upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1997 insertions, 0 deletions

diff --git a/mysql-test/main/group_min_max.test b/mysql-test/main/group_min_max.test
new file mode 100644
index 00000000..68ec1497
--- /dev/null
+++ b/mysql-test/main/group_min_max.test
@@ -0,0 +1,1997 @@
+#
+# Test file for WL#1724 (Min/Max Optimization for Queries with Group By Clause).
+# The queries in this file test query execution via QUICK_GROUP_MIN_MAX_SELECT.
+#
+
+--source include/no_valgrind_without_big.inc
+--source include/default_optimizer_switch.inc
+--source include/have_sequence.inc
+--source include/have_innodb.inc
+--source include/have_sequence.inc
+#
+# TODO:
+# Add queries with:
+# - C != const
+# - C IS NOT NULL
+# - HAVING clause
+
+--disable_warnings
+drop table if exists t1;
+--enable_warnings
+
+create table t1 (
+  a1 char(64), a2 char(64), b char(16), c char(16) not null, d char(16), dummy char(248) default ' '
+);
+
+insert into t1 (a1, a2, b, c, d) values
+('a','a','a','a111','xy1'),('a','a','a','b111','xy2'),('a','a','a','c111','xy3'),('a','a','a','d111','xy4'),
+('a','a','b','e112','xy1'),('a','a','b','f112','xy2'),('a','a','b','g112','xy3'),('a','a','b','h112','xy4'),
+('a','b','a','i121','xy1'),('a','b','a','j121','xy2'),('a','b','a','k121','xy3'),('a','b','a','l121','xy4'),
+('a','b','b','m122','xy1'),('a','b','b','n122','xy2'),('a','b','b','o122','xy3'),('a','b','b','p122','xy4'),
+('b','a','a','a211','xy1'),('b','a','a','b211','xy2'),('b','a','a','c211','xy3'),('b','a','a','d211','xy4'),
+('b','a','b','e212','xy1'),('b','a','b','f212','xy2'),('b','a','b','g212','xy3'),('b','a','b','h212','xy4'),
+('b','b','a','i221','xy1'),('b','b','a','j221','xy2'),('b','b','a','k221','xy3'),('b','b','a','l221','xy4'),
+('b','b','b','m222','xy1'),('b','b','b','n222','xy2'),('b','b','b','o222','xy3'),('b','b','b','p222','xy4'),
+('c','a','a','a311','xy1'),('c','a','a','b311','xy2'),('c','a','a','c311','xy3'),('c','a','a','d311','xy4'),
+('c','a','b','e312','xy1'),('c','a','b','f312','xy2'),('c','a','b','g312','xy3'),('c','a','b','h312','xy4'),
+('c','b','a','i321','xy1'),('c','b','a','j321','xy2'),('c','b','a','k321','xy3'),('c','b','a','l321','xy4'),
+('c','b','b','m322','xy1'),('c','b','b','n322','xy2'),('c','b','b','o322','xy3'),('c','b','b','p322','xy4'),
+('d','a','a','a411','xy1'),('d','a','a','b411','xy2'),('d','a','a','c411','xy3'),('d','a','a','d411','xy4'),
+('d','a','b','e412','xy1'),('d','a','b','f412','xy2'),('d','a','b','g412','xy3'),('d','a','b','h412','xy4'),
+('d','b','a','i421','xy1'),('d','b','a','j421','xy2'),('d','b','a','k421','xy3'),('d','b','a','l421','xy4'),
+('d','b','b','m422','xy1'),('d','b','b','n422','xy2'),('d','b','b','o422','xy3'),('d','b','b','p422','xy4'),
+('a','a','a','a111','xy1'),('a','a','a','b111','xy2'),('a','a','a','c111','xy3'),('a','a','a','d111','xy4'),
+('a','a','b','e112','xy1'),('a','a','b','f112','xy2'),('a','a','b','g112','xy3'),('a','a','b','h112','xy4'),
+('a','b','a','i121','xy1'),('a','b','a','j121','xy2'),('a','b','a','k121','xy3'),('a','b','a','l121','xy4'),
+('a','b','b','m122','xy1'),('a','b','b','n122','xy2'),('a','b','b','o122','xy3'),('a','b','b','p122','xy4'),
+('b','a','a','a211','xy1'),('b','a','a','b211','xy2'),('b','a','a','c211','xy3'),('b','a','a','d211','xy4'),
+('b','a','b','e212','xy1'),('b','a','b','f212','xy2'),('b','a','b','g212','xy3'),('b','a','b','h212','xy4'),
+('b','b','a','i221','xy1'),('b','b','a','j221','xy2'),('b','b','a','k221','xy3'),('b','b','a','l221','xy4'),
+('b','b','b','m222','xy1'),('b','b','b','n222','xy2'),('b','b','b','o222','xy3'),('b','b','b','p222','xy4'),
+('c','a','a','a311','xy1'),('c','a','a','b311','xy2'),('c','a','a','c311','xy3'),('c','a','a','d311','xy4'),
+('c','a','b','e312','xy1'),('c','a','b','f312','xy2'),('c','a','b','g312','xy3'),('c','a','b','h312','xy4'),
+('c','b','a','i321','xy1'),('c','b','a','j321','xy2'),('c','b','a','k321','xy3'),('c','b','a','l321','xy4'),
+('c','b','b','m322','xy1'),('c','b','b','n322','xy2'),('c','b','b','o322','xy3'),('c','b','b','p322','xy4'),
+('d','a','a','a411','xy1'),('d','a','a','b411','xy2'),('d','a','a','c411','xy3'),('d','a','a','d411','xy4'),
+('d','a','b','e412','xy1'),('d','a','b','f412','xy2'),('d','a','b','g412','xy3'),('d','a','b','h412','xy4'),
+('d','b','a','i421','xy1'),('d','b','a','j421','xy2'),('d','b','a','k421','xy3'),('d','b','a','l421','xy4'),
+('d','b','b','m422','xy1'),('d','b','b','n422','xy2'),('d','b','b','o422','xy3'),('d','b','b','p422','xy4');
+insert into t1 select * from t1;
+insert into t1 select * from t1;
+
+create index idx_t1_0 on t1 (a1);
+create index idx_t1_1 on t1 (a1,a2,b,c);
+create index idx_t1_2 on t1 (a1,a2,b);
+analyze table t1;
+
+# t2 is the same as t1, but with some NULLs in the MIN/MAX column, and
+# one more nullable attribute
+
+--disable_warnings
+drop table if exists t2;
+--enable_warnings
+
+create table t2 (
+  a1 char(64), a2 char(64) not null, b char(16), c char(16), d char(16), dummy char(248) default ' '
+);
+insert into t2 select * from t1;
+# add few rows with NULL's in the MIN/MAX column
+insert into t2 (a1, a2, b, c, d) values
+('a','a',NULL,'a777','xyz'),('a','a',NULL,'a888','xyz'),('a','a',NULL,'a999','xyz'),
+('a','a','a',NULL,'xyz'),
+('a','a','b',NULL,'xyz'),
+('a','b','a',NULL,'xyz'),
+('c','a',NULL,'c777','xyz'),('c','a',NULL,'c888','xyz'),('c','a',NULL,'c999','xyz'),
+('d','b','b',NULL,'xyz'),
+('e','a','a',NULL,'xyz'),('e','a','a',NULL,'xyz'),('e','a','a',NULL,'xyz'),('e','a','a',NULL,'xyz'),
+('e','a','b',NULL,'xyz'),('e','a','b',NULL,'xyz'),('e','a','b',NULL,'xyz'),('e','a','b',NULL,'xyz'),
+('a','a',NULL,'a777','xyz'),('a','a',NULL,'a888','xyz'),('a','a',NULL,'a999','xyz'),
+('a','a','a',NULL,'xyz'),
+('a','a','b',NULL,'xyz'),
+('a','b','a',NULL,'xyz'),
+('c','a',NULL,'c777','xyz'),('c','a',NULL,'c888','xyz'),('c','a',NULL,'c999','xyz'),
+('d','b','b',NULL,'xyz'),
+('e','a','a',NULL,'xyz'),('e','a','a',NULL,'xyz'),('e','a','a',NULL,'xyz'),('e','a','a',NULL,'xyz'),
+('e','a','b',NULL,'xyz'),('e','a','b',NULL,'xyz'),('e','a','b',NULL,'xyz'),('e','a','b',NULL,'xyz');
+
+create index idx_t2_0 on t2 (a1);
+create index idx_t2_1 on t2 (a1,a2,b,c);
+create index idx_t2_2 on t2 (a1,a2,b);
+analyze table t2;
+
+# Table t3 is the same as t1, but with smaller column lenghts.
+# This allows to test different branches of the cost computation procedure
+# when the number of keys per block are less than the number of keys in the
+# sub-groups formed by predicates over non-group attributes. 
+
+--disable_warnings
+drop table if exists t3;
+--enable_warnings
+
+create table t3 (
+  a1 char(1), a2 char(1), b char(1), c char(4) not null, d char(3), dummy char(1) default ' '
+);
+
+insert into t3 (a1, a2, b, c, d) values
+('a','a','a','a111','xy1'),('a','a','a','b111','xy2'),('a','a','a','c111','xy3'),('a','a','a','d111','xy4'),
+('a','a','b','e112','xy1'),('a','a','b','f112','xy2'),('a','a','b','g112','xy3'),('a','a','b','h112','xy4'),
+('a','b','a','i121','xy1'),('a','b','a','j121','xy2'),('a','b','a','k121','xy3'),('a','b','a','l121','xy4'),
+('a','b','b','m122','xy1'),('a','b','b','n122','xy2'),('a','b','b','o122','xy3'),('a','b','b','p122','xy4'),
+('b','a','a','a211','xy1'),('b','a','a','b211','xy2'),('b','a','a','c211','xy3'),('b','a','a','d211','xy4'),
+('b','a','b','e212','xy1'),('b','a','b','f212','xy2'),('b','a','b','g212','xy3'),('b','a','b','h212','xy4'),
+('b','b','a','i221','xy1'),('b','b','a','j221','xy2'),('b','b','a','k221','xy3'),('b','b','a','l221','xy4'),
+('b','b','b','m222','xy1'),('b','b','b','n222','xy2'),('b','b','b','o222','xy3'),('b','b','b','p222','xy4'),
+('c','a','a','a311','xy1'),('c','a','a','b311','xy2'),('c','a','a','c311','xy3'),('c','a','a','d311','xy4'),
+('c','a','b','e312','xy1'),('c','a','b','f312','xy2'),('c','a','b','g312','xy3'),('c','a','b','h312','xy4'),
+('c','b','a','i321','xy1'),('c','b','a','j321','xy2'),('c','b','a','k321','xy3'),('c','b','a','l321','xy4'),
+('c','b','b','m322','xy1'),('c','b','b','n322','xy2'),('c','b','b','o322','xy3'),('c','b','b','p322','xy4');
+insert into t3 (a1, a2, b, c, d) values
+('a','a','a','a111','xy1'),('a','a','a','b111','xy2'),('a','a','a','c111','xy3'),('a','a','a','d111','xy4'),
+('a','a','b','e112','xy1'),('a','a','b','f112','xy2'),('a','a','b','g112','xy3'),('a','a','b','h112','xy4'),
+('a','b','a','i121','xy1'),('a','b','a','j121','xy2'),('a','b','a','k121','xy3'),('a','b','a','l121','xy4'),
+('a','b','b','m122','xy1'),('a','b','b','n122','xy2'),('a','b','b','o122','xy3'),('a','b','b','p122','xy4'),
+('b','a','a','a211','xy1'),('b','a','a','b211','xy2'),('b','a','a','c211','xy3'),('b','a','a','d211','xy4'),
+('b','a','b','e212','xy1'),('b','a','b','f212','xy2'),('b','a','b','g212','xy3'),('b','a','b','h212','xy4'),
+('b','b','a','i221','xy1'),('b','b','a','j221','xy2'),('b','b','a','k221','xy3'),('b','b','a','l221','xy4'),
+('b','b','b','m222','xy1'),('b','b','b','n222','xy2'),('b','b','b','o222','xy3'),('b','b','b','p222','xy4'),
+('c','a','a','a311','xy1'),('c','a','a','b311','xy2'),('c','a','a','c311','xy3'),('c','a','a','d311','xy4'),
+('c','a','b','e312','xy1'),('c','a','b','f312','xy2'),('c','a','b','g312','xy3'),('c','a','b','h312','xy4'),
+('c','b','a','i321','xy1'),('c','b','a','j321','xy2'),('c','b','a','k321','xy3'),('c','b','a','l321','xy4'),
+('c','b','b','m322','xy1'),('c','b','b','n322','xy2'),('c','b','b','o322','xy3'),('c','b','b','p322','xy4');
+insert into t3 (a1, a2, b, c, d) values
+('a','a','a','a111','xy1'),('a','a','a','b111','xy2'),('a','a','a','c111','xy3'),('a','a','a','d111','xy4'),
+('a','a','b','e112','xy1'),('a','a','b','f112','xy2'),('a','a','b','g112','xy3'),('a','a','b','h112','xy4'),
+('a','b','a','i121','xy1'),('a','b','a','j121','xy2'),('a','b','a','k121','xy3'),('a','b','a','l121','xy4'),
+('a','b','b','m122','xy1'),('a','b','b','n122','xy2'),('a','b','b','o122','xy3'),('a','b','b','p122','xy4'),
+('b','a','a','a211','xy1'),('b','a','a','b211','xy2'),('b','a','a','c211','xy3'),('b','a','a','d211','xy4'),
+('b','a','b','e212','xy1'),('b','a','b','f212','xy2'),('b','a','b','g212','xy3'),('b','a','b','h212','xy4'),
+('b','b','a','i221','xy1'),('b','b','a','j221','xy2'),('b','b','a','k221','xy3'),('b','b','a','l221','xy4'),
+('b','b','b','m222','xy1'),('b','b','b','n222','xy2'),('b','b','b','o222','xy3'),('b','b','b','p222','xy4'),
+('c','a','a','a311','xy1'),('c','a','a','b311','xy2'),('c','a','a','c311','xy3'),('c','a','a','d311','xy4'),
+('c','a','b','e312','xy1'),('c','a','b','f312','xy2'),('c','a','b','g312','xy3'),('c','a','b','h312','xy4'),
+('c','b','a','i321','xy1'),('c','b','a','j321','xy2'),('c','b','a','k321','xy3'),('c','b','a','l321','xy4'),
+('c','b','b','m322','xy1'),('c','b','b','n322','xy2'),('c','b','b','o322','xy3'),('c','b','b','p322','xy4');
+insert into t3 (a1, a2, b, c, d) values
+('a','a','a','a111','xy1'),('a','a','a','b111','xy2'),('a','a','a','c111','xy3'),('a','a','a','d111','xy4'),
+('a','a','b','e112','xy1'),('a','a','b','f112','xy2'),('a','a','b','g112','xy3'),('a','a','b','h112','xy4'),
+('a','b','a','i121','xy1'),('a','b','a','j121','xy2'),('a','b','a','k121','xy3'),('a','b','a','l121','xy4'),
+('a','b','b','m122','xy1'),('a','b','b','n122','xy2'),('a','b','b','o122','xy3'),('a','b','b','p122','xy4'),
+('b','a','a','a211','xy1'),('b','a','a','b211','xy2'),('b','a','a','c211','xy3'),('b','a','a','d211','xy4'),
+('b','a','b','e212','xy1'),('b','a','b','f212','xy2'),('b','a','b','g212','xy3'),('b','a','b','h212','xy4'),
+('b','b','a','i221','xy1'),('b','b','a','j221','xy2'),('b','b','a','k221','xy3'),('b','b','a','l221','xy4'),
+('b','b','b','m222','xy1'),('b','b','b','n222','xy2'),('b','b','b','o222','xy3'),('b','b','b','p222','xy4'),
+('c','a','a','a311','xy1'),('c','a','a','b311','xy2'),('c','a','a','c311','xy3'),('c','a','a','d311','xy4'),
+('c','a','b','e312','xy1'),('c','a','b','f312','xy2'),('c','a','b','g312','xy3'),('c','a','b','h312','xy4'),
+('c','b','a','i321','xy1'),('c','b','a','j321','xy2'),('c','b','a','k321','xy3'),('c','b','a','l321','xy4'),
+('c','b','b','m322','xy1'),('c','b','b','n322','xy2'),('c','b','b','o322','xy3'),('c','b','b','p322','xy4');
+
+create index idx_t3_0 on t3 (a1);
+create index idx_t3_1 on t3 (a1,a2,b,c);
+create index idx_t3_2 on t3 (a1,a2,b);
+analyze table t3;
+
+
+#
+# Queries without a WHERE clause. These queries do not use ranges.
+#
+
+# plans
+explain select a1, min(a2) from t1 group by a1;
+explain select a1, max(a2) from t1 group by a1;
+explain select a1, min(a2), max(a2) from t1 group by a1;
+explain select a1, a2, b, min(c), max(c) from t1 group by a1,a2,b;
+explain select a1,a2,b,max(c),min(c) from t1 group by a1,a2,b;
+--replace_column 7 # 9 #
+explain select a1,a2,b,max(c),min(c) from t2 group by a1,a2,b;
+# Select fields in different order
+explain select min(a2), a1, max(a2), min(a2), a1 from t1 group by a1;
+explain select a1, b, min(c), a1, max(c), b, a2, max(c), max(c) from t1 group by a1, a2, b;
+explain select min(a2) from t1 group by a1;
+explain select a2, min(c), max(c) from t1 group by a1,a2,b;
+
+# queries
+select a1, min(a2) from t1 group by a1;
+select a1, max(a2) from t1 group by a1;
+select a1, min(a2), max(a2) from t1 group by a1;
+select a1, a2, b, min(c), max(c) from t1 group by a1,a2,b;
+select a1,a2,b,max(c),min(c) from t1 group by a1,a2,b;
+select a1,a2,b,max(c),min(c) from t2 group by a1,a2,b;
+# Select fields in different order
+select min(a2), a1, max(a2), min(a2), a1 from t1 group by a1;
+select a1, b, min(c), a1, max(c), b, a2, max(c), max(c) from t1 group by a1, a2, b;
+select min(a2) from t1 group by a1;
+select a2, min(c), max(c) from t1 group by a1,a2,b;
+
+#
+# Queries with a where clause
+#
+
+# A) Preds only over the group 'A' attributes
+# plans
+explain select a1,a2,b,min(c),max(c) from t1 where a1 < 'd' group by a1,a2,b;
+explain select a1,a2,b,min(c),max(c) from t1 where a1 >= 'b' group by a1,a2,b;
+explain select a1,a2,b,       max(c) from t1 where a1 >= 'c' or a1 < 'b' group by a1,a2,b;
+explain select a1, max(c)            from t1 where a1 >= 'c' or a1 < 'b' group by a1,a2,b;
+explain select a1,a2,b,min(c),max(c) from t1 where a1 >= 'c' or a2 < 'b' group by a1,a2,b;
+explain select a1,a2,b,       max(c) from t1 where a1 = 'z' or a1 = 'b' or a1 = 'd' group by a1,a2,b;
+explain select a1,a2,b,min(c),max(c) from t1 where a1 = 'z' or a1 = 'b' or a1 = 'd' group by a1,a2,b;
+explain select a1,a2,b,       max(c) from t1 where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') group by a1,a2,b;
+explain select a1,a2,b,min(c),max(c) from t1 where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') group by a1,a2,b;
+explain select a1,min(c),max(c)      from t1 where a1 >= 'b' group by a1,a2,b;
+explain select a1,  max(c)           from t1 where a1 in ('a','b','d') group by a1,a2,b;
+
+--replace_column 9 #
+explain select a1,a2,b,       max(c) from t2 where a1 < 'd' group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,min(c),max(c) from t2 where a1 < 'd' group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,min(c),max(c) from t2 where a1 >= 'b' group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,       max(c) from t2 where a1 >= 'c' or a1 < 'b' group by a1,a2,b;
+--replace_column 9 #
+explain select a1, max(c)            from t2 where a1 >= 'c' or a1 < 'b' group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,min(c),max(c) from t2 where a1 >= 'c' or a2 < 'b' group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,       max(c) from t2 where a1 = 'z' or a1 = 'b' or a1 = 'd' group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,min(c),max(c) from t2 where a1 = 'z' or a1 = 'b' or a1 = 'd' group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,       max(c) from t2 where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,min(c),max(c) from t2 where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') group by a1,a2,b;
+--replace_column 9 #
+explain select a1,min(c),max(c)      from t2 where a1 >= 'b' group by a1,a2,b;
+--replace_column 9 #
+explain select a1,  max(c)           from t2 where a1 in ('a','b','d') group by a1,a2,b;
+
+# queries
+select a1,a2,b,min(c),max(c) from t1 where a1 < 'd' group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t1 where a1 >= 'b' group by a1,a2,b;
+select a1,a2,b,       max(c) from t1 where a1 >= 'c' or a1 < 'b' group by a1,a2,b;
+select a1, max(c)            from t1 where a1 >= 'c' or a1 < 'b' group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t1 where a1 >= 'c' or a2 < 'b' group by a1,a2,b;
+select a1,a2,b,       max(c) from t1 where a1 = 'z' or a1 = 'b' or a1 = 'd' group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t1 where a1 = 'z' or a1 = 'b' or a1 = 'd' group by a1,a2,b;
+select a1,a2,b,       max(c) from t1 where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t1 where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') group by a1,a2,b;
+select a1,min(c),max(c)      from t1 where a1 >= 'b' group by a1,a2,b;
+select a1,  max(c)           from t1 where a1 in ('a','b','d') group by a1,a2,b;
+
+select a1,a2,b,       max(c) from t2 where a1 < 'd' group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t2 where a1 < 'd' group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t2 where a1 >= 'b' group by a1,a2,b;
+select a1,a2,b,       max(c) from t2 where a1 >= 'c' or a1 < 'b' group by a1,a2,b;
+select a1, max(c)            from t2 where a1 >= 'c' or a1 < 'b' group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t2 where a1 >= 'c' or a2 < 'b' group by a1,a2,b;
+select a1,a2,b,       max(c) from t2 where a1 = 'z' or a1 = 'b' or a1 = 'd' group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t2 where a1 = 'z' or a1 = 'b' or a1 = 'd' group by a1,a2,b;
+select a1,a2,b,       max(c) from t2 where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t2 where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') group by a1,a2,b;
+select a1,min(c),max(c)      from t2 where a1 >= 'b' group by a1,a2,b;
+select a1,  max(c)           from t2 where a1 in ('a','b','d') group by a1,a2,b;
+
+# B) Equalities only over the non-group 'B' attributes
+# plans
+explain select a1,a2,b,max(c),min(c) from t1 where (a2 = 'a') and (b = 'b') group by a1;
+explain select a1,max(c),min(c)      from t1 where (a2 = 'a') and (b = 'b') group by a1;
+explain select a1,a2,b,       max(c) from t1 where (b = 'b') group by a1,a2;
+explain select a1,a2,b,min(c),max(c) from t1 where (b = 'b') group by a1,a2;
+explain select a1,a2, max(c)         from t1 where (b = 'b') group by a1,a2;
+
+explain select a1,a2,b,max(c),min(c) from t2 where (a2 = 'a') and (b = 'b') group by a1;
+explain select a1,max(c),min(c)      from t2 where (a2 = 'a') and (b = 'b') group by a1;
+explain select a1,a2,b,       max(c) from t2 where (b = 'b') group by a1,a2;
+explain select a1,a2,b,min(c),max(c) from t2 where (b = 'b') group by a1,a2;
+explain select a1,a2, max(c)         from t2 where (b = 'b') group by a1,a2;
+
+# these queries test case 2) in TRP_GROUP_MIN_MAX::update_cost()
+explain select a1,a2,b,max(c),min(c) from t3 where (a2 = 'a') and (b = 'b') group by a1;
+explain select a1,max(c),min(c)      from t3 where (a2 = 'a') and (b = 'b') group by a1;
+
+# queries
+select a1,a2,b,max(c),min(c) from t1 where (a2 = 'a') and (b = 'b') group by a1;
+select a1,max(c),min(c)      from t1 where (a2 = 'a') and (b = 'b') group by a1;
+select a1,a2,b,       max(c) from t1 where (b = 'b') group by a1,a2;
+select a1,a2,b,min(c),max(c) from t1 where (b = 'b') group by a1,a2;
+select a1,a2, max(c)         from t1 where (b = 'b') group by a1,a2;
+
+select a1,a2,b,max(c),min(c) from t2 where (a2 = 'a') and (b = 'b') group by a1;
+select a1,max(c),min(c)      from t2 where (a2 = 'a') and (b = 'b') group by a1;
+select a1,a2,b,       max(c) from t2 where (b = 'b') group by a1,a2;
+select a1,a2,b,min(c),max(c) from t2 where (b = 'b') group by a1,a2;
+select a1,a2, max(c)         from t2 where (b = 'b') group by a1,a2;
+
+# these queries test case 2) in TRP_GROUP_MIN_MAX::update_cost()
+select a1,a2,b,max(c),min(c) from t3 where (a2 = 'a') and (b = 'b') group by a1;
+select a1,max(c),min(c)      from t3 where (a2 = 'a') and (b = 'b') group by a1;
+
+
+# IS NULL (makes sense for t2 only)
+# plans
+explain select a1,a2,b,min(c) from t2 where (a2 = 'a') and b is NULL group by a1;
+explain select a1,a2,b,max(c) from t2 where (a2 = 'a') and b is NULL group by a1;
+explain select a1,a2,b,min(c) from t2 where b is NULL group by a1,a2;
+explain select a1,a2,b,max(c) from t2 where b is NULL group by a1,a2;
+explain select a1,a2,b,min(c),max(c) from t2 where b is NULL group by a1,a2;
+explain select a1,a2,b,min(c),max(c) from t2 where b is NULL group by a1,a2;
+# queries
+select a1,a2,b,min(c) from t2 where (a2 = 'a') and b is NULL group by a1;
+select a1,a2,b,max(c) from t2 where (a2 = 'a') and b is NULL group by a1;
+select a1,a2,b,min(c) from t2 where b is NULL group by a1,a2;
+select a1,a2,b,max(c) from t2 where b is NULL group by a1,a2;
+select a1,a2,b,min(c),max(c) from t2 where b is NULL group by a1,a2;
+select a1,a2,b,min(c),max(c) from t2 where b is NULL group by a1,a2;
+
+# C) Range predicates for the MIN/MAX attribute
+# plans
+--replace_column 9 #
+explain select a1,a2,b,       max(c) from t1 where (c > 'b1') group by a1,a2,b;
+explain select a1,a2,b,min(c),max(c) from t1 where (c > 'b1') group by a1,a2,b;
+explain select a1,a2,b,       max(c) from t1 where (c > 'f123') group by a1,a2,b;
+explain select a1,a2,b,min(c),max(c) from t1 where (c > 'f123') group by a1,a2,b;
+explain select a1,a2,b,       max(c) from t1 where (c < 'a0') group by a1,a2,b;
+explain select a1,a2,b,min(c),max(c) from t1 where (c < 'a0') group by a1,a2,b;
+explain select a1,a2,b,       max(c) from t1 where (c < 'k321') group by a1,a2,b;
+explain select a1,a2,b,min(c),max(c) from t1 where (c < 'k321') group by a1,a2,b;
+explain select a1,a2,b,       max(c) from t1 where (c < 'a0') or (c > 'b1') group by a1,a2,b;
+explain select a1,a2,b,min(c),max(c) from t1 where (c < 'a0') or (c > 'b1') group by a1,a2,b;
+explain select a1,a2,b,       max(c) from t1 where (c > 'b1') or (c <= 'g1') group by a1,a2,b;
+explain select a1,a2,b,min(c),max(c) from t1 where (c > 'b1') or (c <= 'g1') group by a1,a2,b;
+explain select a1,a2,b,min(c),max(c) from t1 where (c > 'b111') and (c <= 'g112') group by a1,a2,b;
+explain select a1,a2,b,min(c),max(c) from t1 where (c < 'c5') or (c = 'g412') or (c = 'k421') group by a1,a2,b;
+explain select a1,a2,b,min(c),max(c) from t1 where ((c > 'b111') and (c <= 'g112')) or ((c > 'd000') and (c <= 'i110')) group by a1,a2,b;
+explain select a1,a2,b,min(c),max(c) from t1 where (c between 'b111' and 'g112') or (c between 'd000' and 'i110') group by a1,a2,b;
+
+--replace_column 9 #
+explain select a1,a2,b,       max(c) from t2 where (c > 'b1') group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,min(c),max(c) from t2 where (c > 'b1') group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,       max(c) from t2 where (c > 'f123') group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,min(c),max(c) from t2 where (c > 'f123') group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,       max(c) from t2 where (c < 'a0') group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,min(c),max(c) from t2 where (c < 'a0') group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,       max(c) from t2 where (c < 'k321') group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,min(c),max(c) from t2 where (c < 'k321') group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,       max(c) from t2 where (c < 'a0') or (c > 'b1') group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,min(c),max(c) from t2 where (c < 'a0') or (c > 'b1') group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,       max(c) from t2 where (c > 'b1') or (c <= 'g1') group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,min(c),max(c) from t2 where (c > 'b1') or (c <= 'g1') group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,min(c),max(c) from t2 where (c > 'b111') and (c <= 'g112') group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,min(c),max(c) from t2 where (c < 'c5') or (c = 'g412') or (c = 'k421') group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,min(c),max(c) from t2 where ((c > 'b111') and (c <= 'g112')) or ((c > 'd000') and (c <= 'i110')) group by a1,a2,b;
+
+# queries
+select a1,a2,b,       max(c) from t1 where (c > 'b1') group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t1 where (c > 'b1') group by a1,a2,b;
+select a1,a2,b,       max(c) from t1 where (c > 'f123') group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t1 where (c > 'f123') group by a1,a2,b;
+select a1,a2,b,       max(c) from t1 where (c < 'a0') group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t1 where (c < 'a0') group by a1,a2,b;
+select a1,a2,b,       max(c) from t1 where (c < 'k321') group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t1 where (c < 'k321') group by a1,a2,b;
+select a1,a2,b,       max(c) from t1 where (c < 'a0') or (c > 'b1') group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t1 where (c < 'a0') or (c > 'b1') group by a1,a2,b;
+select a1,a2,b,       max(c) from t1 where (c > 'b1') or (c <= 'g1') group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t1 where (c > 'b1') or (c <= 'g1') group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t1 where (c > 'b111') and (c <= 'g112') group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t1 where (c < 'c5') or (c = 'g412') or (c = 'k421') group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t1 where ((c > 'b111') and (c <= 'g112')) or ((c > 'd000') and (c <= 'i110')) group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t1 where (c between 'b111' and 'g112') or (c between 'd000' and 'i110') group by a1,a2,b;
+
+select a1,a2,b,       max(c) from t2 where (c > 'b1') group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t2 where (c > 'b1') group by a1,a2,b;
+select a1,a2,b,       max(c) from t2 where (c > 'f123') group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t2 where (c > 'f123') group by a1,a2,b;
+select a1,a2,b,       max(c) from t2 where (c < 'a0') group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t2 where (c < 'a0') group by a1,a2,b;
+select a1,a2,b,       max(c) from t2 where (c < 'k321') group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t2 where (c < 'k321') group by a1,a2,b;
+select a1,a2,b,       max(c) from t2 where (c < 'a0') or (c > 'b1') group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t2 where (c < 'a0') or (c > 'b1') group by a1,a2,b;
+select a1,a2,b,       max(c) from t2 where (c > 'b1') or (c <= 'g1') group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t2 where (c > 'b1') or (c <= 'g1') group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t2 where (c > 'b111') and (c <= 'g112') group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t2 where (c < 'c5') or (c = 'g412') or (c = 'k421') group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t2 where ((c > 'b111') and (c <= 'g112')) or ((c > 'd000') and (c <= 'i110')) group by a1,a2,b;
+
+# analyze the sub-select
+explain select a1,a2,b,min(c),max(c) from t1
+where exists ( select * from t2 where t2.c = t1.c )
+group by a1,a2,b;
+
+select a1,a2,b,min(c),max(c) from t1
+where exists ( select * from t2 where t2.c = t1.c )
+group by a1,a2,b;
+
+# the sub-select is unrelated to MIN/MAX
+explain select a1,a2,b,min(c),max(c) from t1
+where exists ( select * from t2 where t2.c > 'b1' )
+group by a1,a2,b;
+
+select a1,a2,b,min(c),max(c) from t1
+where exists ( select * from t2 where t2.c > 'b1' )
+group by a1,a2,b;
+
+# correlated subselect that doesn't reference the min/max argument
+explain select a1,a2,b,c,min(c), max(c) from t1
+where exists ( select * from t2 where t1.b > 'a' and t2.c > 'b1' )
+group by a1,a2,b;
+
+select a1,a2,b,c,min(c), max(c) from t1
+where exists ( select * from t2 where t1.b > 'a' and t2.c > 'b1' )
+group by a1,a2,b;
+
+SET @save_optimizer_switch=@@optimizer_switch;
+SET optimizer_switch='semijoin_with_cache=off';
+explain select a1,a2,b,c,min(c), max(c) from t1
+where exists ( select * from t2
+               where t2.c in (select c from t3 where t3.c > t1.b) and
+               t2.c > 'b1' )
+group by a1,a2,b;
+
+select a1,a2,b,c,min(c), max(c) from t1
+where exists ( select * from t2
+               where t2.c in (select c from t3 where t3.c > t1.b) and
+               t2.c > 'b1' )
+group by a1,a2,b;
+SET optimizer_switch=@save_optimizer_switch;
+
+# correlated subselect that references the min/max argument
+explain select a1,a2,b,c,min(c), max(c) from t1
+where exists ( select * from t2 where t1.c > 'a' and t2.c > 'b1' )
+group by a1,a2,b;
+
+select a1,a2,b,c,min(c), max(c) from t1
+where exists ( select * from t2 where t1.c > 'a' and t2.c > 'b1' )
+group by a1,a2,b;
+
+SET @save_optimizer_switch=@@optimizer_switch;
+SET optimizer_switch='semijoin_with_cache=off';
+explain select a1,a2,b,c,min(c), max(c) from t1
+where exists ( select * from t2
+               where t2.c in (select c from t3 where t3.c > t1.c) and
+               t2.c > 'b1' )
+group by a1,a2,b;
+
+select a1,a2,b,c,min(c), max(c) from t1
+where exists ( select * from t2
+               where t2.c in (select c from t3 where t3.c > t1.c) and
+               t2.c > 'b1' )
+group by a1,a2,b;
+SET optimizer_switch=@save_optimizer_switch;
+
+
+# A,B,C) Predicates referencing mixed classes of attributes
+# plans
+explain select a1,a2,b,min(c),max(c) from t1 where (a1 >= 'c' or a2 < 'b') and (b > 'a') group by a1,a2,b;
+explain select a1,a2,b,min(c),max(c) from t1 where (a1 >= 'c' or a2 < 'b') and (c > 'b111') group by a1,a2,b;
+explain select a1,a2,b,min(c),max(c) from t1 where (a2 >= 'b') and (b = 'a') and (c > 'b111') group by a1,a2,b;
+explain select a1,a2,b,min(c) from t1 where ((a1 > 'a') or (a1 < '9'))  and ((a2 >= 'b') and (a2 < 'z')) and (b = 'a') and ((c < 'h112') or (c = 'j121') or (c > 'k121' and c < 'm122') or (c > 'o122')) group by a1,a2,b;
+explain select a1,a2,b,min(c) from t1 where ((a1 > 'a') or (a1 < '9'))  and ((a2 >= 'b') and (a2 < 'z')) and (b = 'a') and ((c = 'j121') or (c > 'k121' and c < 'm122') or (c > 'o122') or (c < 'h112') or (c = 'c111')) group by a1,a2,b;
+explain select a1,a2,b,min(c) from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
+explain select a1,a2,b,min(c) from t1 where (ord(a1) > 97) and (ord(a2) + ord(a1) > 194) and (b = 'c') group by a1,a2,b;
+
+--replace_column 9 #
+explain select a1,a2,b,min(c),max(c) from t2 where (a1 >= 'c' or a2 < 'b') and (b > 'a') group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,min(c),max(c) from t2 where (a1 >= 'c' or a2 < 'b') and (c > 'b111') group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,min(c),max(c) from t2 where (a2 >= 'b') and (b = 'a') and (c > 'b111') group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,min(c) from t2 where ((a1 > 'a') or (a1 < '9'))  and ((a2 >= 'b') and (a2 < 'z')) and (b = 'a') and ((c < 'h112') or (c = 'j121') or (c > 'k121' and c < 'm122') or (c > 'o122')) group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,min(c) from t2 where ((a1 > 'a') or (a1 < '9'))  and ((a2 >= 'b') and (a2 < 'z')) and (b = 'a') and ((c = 'j121') or (c > 'k121' and c < 'm122') or (c > 'o122') or (c < 'h112') or (c = 'c111')) group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,min(c) from t2 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
+
+# queries
+select a1,a2,b,min(c),max(c) from t1 where (a1 >= 'c' or a2 < 'b') and (b > 'a') group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t1 where (a1 >= 'c' or a2 < 'b') and (c > 'b111') group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t1 where (a2 >= 'b') and (b = 'a') and (c > 'b111') group by a1,a2,b;
+select a1,a2,b,min(c) from t1 where ((a1 > 'a') or (a1 < '9'))  and ((a2 >= 'b') and (a2 < 'z')) and (b = 'a') and ((c < 'h112') or (c = 'j121') or (c > 'k121' and c < 'm122') or (c > 'o122')) group by a1,a2,b;
+select a1,a2,b,min(c) from t1 where ((a1 > 'a') or (a1 < '9'))  and ((a2 >= 'b') and (a2 < 'z')) and (b = 'a') and ((c = 'j121') or (c > 'k121' and c < 'm122') or (c > 'o122') or (c < 'h112') or (c = 'c111')) group by a1,a2,b;
+select a1,a2,b,min(c) from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
+select a1,a2,b,min(c) from t1 where (ord(a1) > 97) and (ord(a2) + ord(a1) > 194) and (b = 'c') group by a1,a2,b;
+
+select a1,a2,b,min(c),max(c) from t2 where (a1 >= 'c' or a2 < 'b') and (b > 'a') group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t2 where (a1 >= 'c' or a2 < 'b') and (c > 'b111') group by a1,a2,b;
+select a1,a2,b,min(c),max(c) from t2 where (a2 >= 'b') and (b = 'a') and (c > 'b111') group by a1,a2,b;
+select a1,a2,b,min(c) from t2 where ((a1 > 'a') or (a1 < '9'))  and ((a2 >= 'b') and (a2 < 'z')) and (b = 'a') and ((c < 'h112') or (c = 'j121') or (c > 'k121' and c < 'm122') or (c > 'o122')) group by a1,a2,b;
+select a1,a2,b,min(c) from t2 where ((a1 > 'a') or (a1 < '9'))  and ((a2 >= 'b') and (a2 < 'z')) and (b = 'a') and ((c = 'j121') or (c > 'k121' and c < 'm122') or (c > 'o122') or (c < 'h112') or (c = 'c111')) group by a1,a2,b;
+select a1,a2,b,min(c) from t2 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
+
+
+#
+# GROUP BY queries without MIN/MAX
+#
+
+# plans
+explain select a1,a2,b from t1 where (a1 >= 'c' or a2 < 'b') and (b > 'a') group by a1,a2,b;
+explain select a1,a2,b from t1 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
+explain select a1,a2,b,c from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121') group by a1,a2,b;
+explain select a1,a2,b from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
+
+--replace_column 9 #
+explain select a1,a2,b from t2 where (a1 >= 'c' or a2 < 'b') and (b > 'a') group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b from t2 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b,c from t2 where (a2 >= 'b') and (b = 'a') and (c = 'i121') group by a1,a2,b;
+--replace_column 9 #
+explain select a1,a2,b from t2 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
+
+# queries
+select a1,a2,b from t1 where (a1 >= 'c' or a2 < 'b') and (b > 'a') group by a1,a2,b;
+select a1,a2,b from t1 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
+select a1,a2,b,c from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121') group by a1,a2,b;
+select a1,a2,b from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
+
+select a1,a2,b from t2 where (a1 >= 'c' or a2 < 'b') and (b > 'a') group by a1,a2,b;
+select a1,a2,b from t2 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
+select a1,a2,b,c from t2 where (a2 >= 'b') and (b = 'a') and (c = 'i121') group by a1,a2,b;
+select a1,a2,b from t2 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
+
+#
+# DISTINCT queries
+#
+
+# plans
+explain select distinct a1,a2,b from t1;
+explain select distinct a1,a2,b from t1 where (a2 >= 'b') and (b = 'a');
+explain extended select distinct a1,a2,b,c from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121');
+explain select distinct a1,a2,b from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c');
+explain select distinct b from t1 where (a2 >= 'b') and (b = 'a');
+
+--replace_column 9 #
+explain select distinct a1,a2,b from t2;
+--replace_column 9 #
+explain select distinct a1,a2,b from t2 where (a2 >= 'b') and (b = 'a');
+explain extended select distinct a1,a2,b,c from t2 where (a2 >= 'b') and (b = 'a') and (c = 'i121');
+--replace_column 9 #
+explain select distinct a1,a2,b from t2 where (a1 > 'a') and (a2 > 'a') and (b = 'c');
+explain select distinct b from t2 where (a2 >= 'b') and (b = 'a');
+
+# queries
+select distinct a1,a2,b from t1;
+select distinct a1,a2,b from t1 where (a2 >= 'b') and (b = 'a');
+select distinct a1,a2,b,c from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121');
+select distinct a1,a2,b from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c');
+select distinct b from t1 where (a2 >= 'b') and (b = 'a');
+
+select distinct a1,a2,b from t2;
+select distinct a1,a2,b from t2 where (a2 >= 'b') and (b = 'a');
+select distinct a1,a2,b,c from t2 where (a2 >= 'b') and (b = 'a') and (c = 'i121');
+select distinct a1,a2,b from t2 where (a1 > 'a') and (a2 > 'a') and (b = 'c');
+select distinct b from t2 where (a2 >= 'b') and (b = 'a');
+
+# BUG #6303
+select distinct t_00.a1
+from t1 t_00
+where exists ( select * from t2 where a1 = t_00.a1 );
+
+# BUG #8532 - SELECT DISTINCT a, a causes server to crash
+select distinct a1,a1 from t1;
+select distinct a2,a1,a2,a1 from t1;
+select distinct t1.a1,t2.a1 from t1,t2;
+
+
+#
+# DISTINCT queries with GROUP-BY
+#
+
+# plans
+explain select distinct a1,a2,b from t1;
+explain select distinct a1,a2,b from t1 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
+explain select distinct a1,a2,b,c from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121') group by a1,a2,b;
+explain select distinct a1,a2,b from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
+explain select distinct b from t1 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
+
+--replace_column 9 #
+explain select distinct a1,a2,b from t2;
+--replace_column 9 #
+explain select distinct a1,a2,b from t2 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
+--replace_column 9 #
+explain select distinct a1,a2,b,c from t2 where (a2 >= 'b') and (b = 'a') and (c = 'i121') group by a1,a2,b;
+--replace_column 9 #
+explain select distinct a1,a2,b from t2 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
+--replace_column 9 #
+explain select distinct b from t2 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
+
+# queries
+select distinct a1,a2,b from t1;
+select distinct a1,a2,b from t1 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
+select distinct a1,a2,b,c from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121') group by a1,a2,b;
+select distinct a1,a2,b from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
+select distinct b from t1 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
+
+select distinct a1,a2,b from t2;
+select distinct a1,a2,b from t2 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
+select distinct a1,a2,b,c from t2 where (a2 >= 'b') and (b = 'a') and (c = 'i121') group by a1,a2,b;
+select distinct a1,a2,b from t2 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
+select distinct b from t2 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
+
+
+#
+# COUNT (DISTINCT cols) queries
+#
+
+explain select count(distinct a1,a2,b) from t1 where (a2 >= 'b') and (b = 'a');
+explain select count(distinct a1,a2,b,c) from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121');
+explain extended select count(distinct a1,a2,b) from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c');
+explain select count(distinct b) from t1 where (a2 >= 'b') and (b = 'a');
+explain extended select 98 + count(distinct a1,a2,b) from t1 where (a1 > 'a') and (a2 > 'a');
+
+select count(distinct a1,a2,b) from t1 where (a2 >= 'b') and (b = 'a');
+select count(distinct a1,a2,b,c) from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121');
+select count(distinct a1,a2,b) from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c');
+select count(distinct b) from t1 where (a2 >= 'b') and (b = 'a');
+select 98 + count(distinct a1,a2,b) from t1 where (a1 > 'a') and (a2 > 'a');
+
+#
+# Queries with expressions in the select clause
+#
+
+explain select a1,a2,b, concat(min(c), max(c)) from t1 where a1 < 'd' group by a1,a2,b;
+explain select concat(a1,min(c)),b from t1 where a1 < 'd' group by a1,a2,b;
+explain select concat(a1,min(c)),b,max(c) from t1 where a1 < 'd' group by a1,a2,b;
+explain select concat(a1,a2),b,min(c),max(c) from t1 where a1 < 'd' group by a1,a2,b;
+explain select concat(ord(min(b)),ord(max(b))),min(b),max(b) from t1 group by a1,a2;
+
+select a1,a2,b, concat(min(c), max(c)) from t1 where a1 < 'd' group by a1,a2,b;
+select concat(a1,min(c)),b from t1 where a1 < 'd' group by a1,a2,b;
+select concat(a1,min(c)),b,max(c) from t1 where a1 < 'd' group by a1,a2,b;
+select concat(a1,a2),b,min(c),max(c) from t1 where a1 < 'd' group by a1,a2,b;
+select concat(ord(min(b)),ord(max(b))),min(b),max(b) from t1 group by a1,a2;
+
+
+#
+# Negative examples: queries that should NOT be treated as optimizable by
+# QUICK_GROUP_MIN_MAX_SELECT
+#
+
+# select a non-indexed attribute
+explain select a1,a2,b,d,min(c),max(c) from t1 group by a1,a2,b;
+
+explain select a1,a2,b,d from t1 group by a1,a2,b;
+
+# predicate that references an attribute that is after the MIN/MAX argument
+# in the index
+explain extended select a1,a2,min(b),max(b) from t1
+where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') and (c > 'a111') group by a1,a2;
+
+# predicate that references a non-indexed attribute
+explain extended select a1,a2,b,min(c),max(c) from t1
+where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') and (d > 'xy2') group by a1,a2,b;
+
+explain extended select a1,a2,b,c from t1
+where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') and (d > 'xy2') group by a1,a2,b,c;
+
+# non-equality predicate for a non-group select attribute
+explain select a1,a2,b,max(c),min(c) from t2 where (a2 = 'a') and (b = 'b') or (b < 'b') group by a1;
+explain extended select a1,a2,b from t1 where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') and (c > 'a111') group by a1,a2,b;
+
+# non-group field with an equality predicate that references a keypart after the
+# MIN/MAX argument
+explain select a1,a2,min(b),c from t2 where (a2 = 'a') and (c = 'a111') group by a1;
+select a1,a2,min(b),c from t2 where (a2 = 'a') and (c = 'a111') group by a1;
+
+# disjunction for a non-group select attribute
+explain select a1,a2,b,max(c),min(c) from t2 where (a2 = 'a') and (b = 'b') or (b = 'a') group by a1;
+
+# non-range predicate for the MIN/MAX attribute
+explain select a1,a2,b,min(c),max(c) from t2
+where (c > 'a000') and (c <= 'd999') and (c like '_8__') group by a1,a2,b;
+
+# not all attributes are indexed by one index
+explain select a1, a2, b, c, min(d), max(d) from t1 group by a1,a2,b,c;
+
+# other aggregate functions than MIN/MAX
+explain select a1,a2,count(a2) from t1 group by a1,a2,b;
+explain extended select a1,a2,count(a2) from t1 where (a1 > 'a') group by a1,a2,b;
+explain extended select sum(ord(a1)) from t1 where (a1 > 'a') group by a1,a2,b;
+
+#
+# MDEV-4120 UNIQUE indexes should not be considered for loose index scan
+#
+
+create table t4 as select distinct a1, a2, b, c from t1;
+alter table t4 add unique index idxt4 (a1, a2, b, c);
+
+--echo # This is "superceded" by MDEV-7118, and Loose Index Scan is again an option:
+explain
+select a1, a2, b, min(c) from t4 group by a1, a2, b;
+select a1, a2, b, min(c) from t4 group by a1, a2, b;
+
+drop table t4;
+
+#
+# Bug #16710: select distinct doesn't return all it should
+#
+
+explain select distinct(a1) from t1 where ord(a2) = 98;
+select distinct(a1) from t1 where ord(a2) = 98;
+
+#
+# BUG#11044: DISTINCT or GROUP BY queries with equality predicates instead of MIN/MAX.
+#
+
+explain select a1 from t1 where a2 = 'b' group by a1;
+select a1 from t1 where a2 = 'b' group by a1;
+
+explain select distinct a1 from t1 where a2 = 'b';
+select distinct a1 from t1 where a2 = 'b';
+
+#
+# Bug #12672: primary key implcitly included in every innodb index
+#
+# Test case moved to group_min_max_innodb
+
+
+#
+# Bug #6142: a problem with the empty innodb table
+#
+# Test case moved to group_min_max_innodb
+
+
+#
+# Bug #9798: group by with rollup
+#
+# Test case moved to group_min_max_innodb
+
+
+#
+# Bug #13293 Wrongly used index results in endless loop.
+#
+# Test case moved to group_min_max_innodb
+
+
+drop table t1,t2,t3;
+
+#
+# Bug #14920 Ordering aggregated result sets with composite primary keys
+# corrupts resultset
+#
+create table t1 (c1 int not null,c2 int not null, primary key(c1,c2));
+insert into t1 (c1,c2) values
+(10,1),(10,2),(10,3),(20,4),(20,5),(20,6),(30,7),(30,8),(30,9);
+select distinct c1, c2 from t1 order by c2;
+select c1,min(c2) as c2 from t1 group by c1 order by c2;
+select c1,c2 from t1 group by c1,c2 order by c2;
+drop table t1;
+
+#
+# Bug #16203: Analysis for possible min/max optimization erroneously
+#             returns impossible range
+#
+
+CREATE TABLE t1 (a varchar(5), b int(11), PRIMARY KEY (a,b));
+INSERT INTO t1 VALUES ('AA',1), ('AA',2), ('AA',3), ('BB',1), ('AA',4);
+OPTIMIZE TABLE t1;
+
+SELECT a FROM t1 WHERE a='AA' GROUP BY a;
+SELECT a FROM t1 WHERE a='BB' GROUP BY a;
+
+EXPLAIN SELECT a FROM t1 WHERE a='AA' GROUP BY a;
+EXPLAIN SELECT a FROM t1 WHERE a='BB' GROUP BY a;
+
+SELECT DISTINCT a FROM t1 WHERE a='BB';
+SELECT DISTINCT a FROM t1 WHERE a LIKE 'B%';
+SELECT a FROM t1 WHERE a LIKE 'B%' GROUP BY a;
+
+DROP TABLE t1;
+
+
+#
+# Bug #15102: select distinct returns empty result, select count 
+#             distinct > 0 (correct)
+#
+
+CREATE TABLE t1 (
+   a int(11) NOT NULL DEFAULT '0',
+   b varchar(16) COLLATE latin1_general_ci NOT NULL DEFAULT '',
+   PRIMARY KEY  (a,b)
+ ) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci;
+
+delimiter |;
+
+CREATE PROCEDURE a(x INT)
+BEGIN
+  DECLARE rnd INT;
+  DECLARE cnt INT;
+
+  WHILE x > 0 DO
+    SET rnd= x % 100;
+    SET cnt = (SELECT COUNT(*) FROM t1 WHERE a = rnd);
+    INSERT INTO t1(a,b) VALUES (rnd, CAST(cnt AS CHAR));
+    SET x= x - 1;
+  END WHILE;
+END|
+
+DELIMITER ;|
+
+CALL a(1000);
+
+SELECT a FROM t1 WHERE a=0;
+SELECT DISTINCT a FROM t1 WHERE a=0;
+SELECT COUNT(DISTINCT a) FROM t1 WHERE a=0;
+
+DROP TABLE t1;
+DROP PROCEDURE a;
+
+#
+# Bug #18068: SELECT DISTINCT
+#
+
+CREATE TABLE t1 (a varchar(64) NOT NULL default '', KEY(a));
+
+INSERT INTO t1 (a) VALUES 
+  (''), ('CENTRAL'), ('EASTERN'), ('GREATER LONDON'),
+  ('NORTH CENTRAL'), ('NORTH EAST'), ('NORTH WEST'), ('SCOTLAND'),
+  ('SOUTH EAST'), ('SOUTH WEST'), ('WESTERN');
+INSERT INTO t1 SELECT * FROM t1;
+INSERT INTO t1 SELECT * FROM t1;
+INSERT INTO t1 SELECT * FROM t1;
+ANALYZE TABLE t1;
+
+EXPLAIN SELECT DISTINCT a,a FROM t1 ORDER BY a;  
+SELECT DISTINCT a,a FROM t1 ORDER BY a;  
+
+DROP TABLE t1;
+
+#
+# Bug #21007: NATURAL JOIN (any JOIN (2 x NATURAL JOIN)) crashes the server
+#
+
+CREATE TABLE t1 (id1 INT, id2 INT);
+CREATE TABLE t2 (id2 INT, id3 INT, id5 INT);
+CREATE TABLE t3 (id3 INT, id4 INT);
+CREATE TABLE t4 (id4 INT);
+CREATE TABLE t5 (id5 INT, id6 INT);
+CREATE TABLE t6 (id6 INT);
+
+INSERT INTO t1 VALUES(1,1);
+INSERT INTO t2 VALUES(1,1,1);
+INSERT INTO t3 VALUES(1,1);
+INSERT INTO t4 VALUES(1);
+INSERT INTO t5 VALUES(1,1);
+INSERT INTO t6 VALUES(1);
+
+# original bug query
+SELECT * FROM
+t1
+  NATURAL JOIN
+(t2 JOIN (t3 NATURAL JOIN t4, t5 NATURAL JOIN t6)
+    ON (t3.id3 = t2.id3 AND t5.id5 = t2.id5));
+
+# inner join swapped
+SELECT * FROM
+t1
+  NATURAL JOIN
+(((t3 NATURAL JOIN t4) join (t5 NATURAL JOIN t6) on t3.id4 = t5.id5) JOIN t2
+    ON (t3.id3 = t2.id3 AND t5.id5 = t2.id5));
+
+# one join less, no ON cond
+SELECT * FROM t1 NATURAL JOIN ((t3 join (t5 NATURAL JOIN t6)) JOIN t2);
+
+# wrong error message: 'id2' - ambiguous column
+SELECT * FROM
+(t2 JOIN (t3 NATURAL JOIN t4, t5 NATURAL JOIN t6)
+    ON (t3.id3 = t2.id3 AND t5.id5 = t2.id5))
+  NATURAL JOIN
+t1;
+SELECT * FROM
+(t2 JOIN ((t3 NATURAL JOIN t4) join (t5 NATURAL JOIN t6)))
+  NATURAL JOIN
+t1;
+
+DROP TABLE t1,t2,t3,t4,t5,t6;
+
+#
+# Bug#22342: No results returned for query using max and group by
+#
+CREATE TABLE t1 (a int, b int, KEY (a,b), KEY b (b));
+INSERT INTO t1 VALUES
+  (1,1),(1,2),(1,0),(1,3),
+  (1,-1),(1,-2),(1,-3),(1,-4);
+ANALYZE TABLE t1;
+
+explain SELECT MAX(b), a FROM t1 WHERE b < 2 AND a = 1 GROUP BY a;
+SELECT MAX(b), a FROM t1 WHERE b < 2 AND a = 1 GROUP BY a;
+SELECT MIN(b), a FROM t1 WHERE b > 1 AND a = 1 GROUP BY a;
+CREATE TABLE t2 (a int, b int, c int, PRIMARY KEY (a,b,c));
+INSERT INTO t2 SELECT a,b,b FROM t1;
+explain SELECT MIN(c) FROM t2 WHERE b = 2 and a = 1 and c > 1 GROUP BY a;
+SELECT MIN(c) FROM t2 WHERE b = 2 and a = 1 and c > 1 GROUP BY a;
+
+DROP TABLE t1,t2;
+
+#
+# Bug#24156: Loose index scan not used with CREATE TABLE ...SELECT and similar statements
+#
+--disable_ps2_protocol
+CREATE TABLE t1 (a INT, b INT, INDEX (a,b));
+INSERT INTO t1 (a, b) VALUES (1,1), (1,2), (1,3), (1,4), (1,5),
+       (2,2), (2,3), (2,1), (3,1), (4,1), (4,2), (4,3), (4,4), (4,5), (4,6);
+ANALYZE TABLE t1;
+EXPLAIN SELECT max(b), a FROM t1 GROUP BY a;
+FLUSH STATUS;
+SELECT max(b), a FROM t1 GROUP BY a;
+SHOW STATUS LIKE 'handler_read__e%';
+EXPLAIN SELECT max(b), a FROM t1 GROUP BY a;
+FLUSH STATUS;
+CREATE TABLE t2 SELECT max(b), a FROM t1 GROUP BY a;
+SHOW STATUS LIKE 'handler_read__e%';
+FLUSH STATUS;
+SELECT * FROM (SELECT max(b), a FROM t1 GROUP BY a) b;
+SHOW STATUS LIKE 'handler_read__e%';
+FLUSH STATUS;
+(SELECT max(b), a FROM t1 GROUP BY a) UNION 
+ (SELECT max(b), a FROM t1 GROUP BY a);
+SHOW STATUS LIKE 'handler_read__e%';
+EXPLAIN (SELECT max(b), a FROM t1 GROUP BY a) UNION 
+ (SELECT max(b), a FROM t1 GROUP BY a);
+
+EXPLAIN SELECT (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) x
+  FROM t1 AS t1_outer;
+EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE EXISTS 
+  (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2);
+EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE 
+  (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) > 12;
+EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE 
+  a IN (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2);
+EXPLAIN SELECT 1 FROM t1 AS t1_outer GROUP BY a HAVING 
+  a > (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2);
+EXPLAIN SELECT 1 FROM t1 AS t1_outer1 JOIN t1 AS t1_outer2 
+   ON t1_outer1.a = (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) 
+   AND t1_outer1.b = t1_outer2.b;
+EXPLAIN SELECT (SELECT (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) x
+  FROM t1 AS t1_outer) x2 FROM t1 AS t1_outer2;
+
+CREATE TABLE t3 LIKE t1;
+FLUSH STATUS;
+INSERT INTO t3 SELECT a,MAX(b) FROM t1 GROUP BY a;
+SHOW STATUS LIKE 'handler_read__e%';
+DELETE FROM t3;
+FLUSH STATUS;
+INSERT INTO t3 SELECT 1, (SELECT MAX(b) FROM t1 GROUP BY a HAVING a < 2) 
+  FROM t1 LIMIT 1;
+SHOW STATUS LIKE 'handler_read__e%';
+FLUSH STATUS;
+DELETE FROM t3 WHERE (SELECT MAX(b) FROM t1 GROUP BY a HAVING a < 2) > 10000;
+SHOW STATUS LIKE 'handler_read__e%';
+FLUSH STATUS;
+--error ER_SUBQUERY_NO_1_ROW
+DELETE FROM t3 WHERE (SELECT (SELECT MAX(b) FROM t1 GROUP BY a HAVING a < 2) x 
+                      FROM t1) > 10000;
+SHOW STATUS LIKE 'handler_read__e%';
+
+DROP TABLE t1,t2,t3;
+--enable_ps2_protocol
+
+#
+# Bug#25602: queries with DISTINCT and SQL_BIG_RESULT hint 
+#            for which loose scan optimization is applied
+#
+
+CREATE TABLE t1 (a int, INDEX idx(a));
+INSERT INTO t1 VALUES
+  (4), (2), (1), (2), (4), (2), (1), (4),
+  (4), (2), (1), (2), (2), (4), (1), (4);
+ANALYZE TABLE t1;
+
+EXPLAIN SELECT DISTINCT(a) FROM t1;
+SELECT DISTINCT(a) FROM t1;
+EXPLAIN SELECT SQL_BIG_RESULT DISTINCT(a) FROM t1;
+SELECT SQL_BIG_RESULT DISTINCT(a) FROM t1;
+
+DROP TABLE t1;
+
+#
+# Bug #32268: Indexed queries give bogus MIN and MAX results
+#
+
+CREATE TABLE t1 (a INT, b INT);
+INSERT INTO t1 (a, b) VALUES (1,1), (1,2), (1,3), (1,4), (1,5);
+INSERT INTO t1 SELECT a + 1, b FROM t1;
+INSERT INTO t1 SELECT a + 2, b FROM t1;
+ANALYZE TABLE t1;
+
+EXPLAIN
+SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a DESC;
+SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a DESC;
+
+CREATE INDEX break_it ON t1 (a, b);
+
+EXPLAIN
+SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a;
+SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a;
+
+EXPLAIN
+SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a DESC;
+SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a DESC;
+
+EXPLAIN
+SELECT a, MIN(b), MAX(b), AVG(b) FROM t1 GROUP BY a ORDER BY a DESC;
+SELECT a, MIN(b), MAX(b), AVG(b) FROM t1 GROUP BY a ORDER BY a DESC;
+
+DROP TABLE t1;
+
+#
+# Bug#38195: Incorrect handling of aggregate functions when loose index scan is
+#            used causes server crash.
+#
+create table t1 (a int, b int, key (a,b), key `index` (a,b)) engine=MyISAM;
+insert into  t1 (a,b) values 
+(0,0),(0,1),(0,2),(0,3),(0,4),(0,5),(0,6),
+  (0,7),(0,8),(0,9),(0,10),(0,11),(0,12),(0,13),
+(1,0),(1,1),(1,2),(1,3),(1,4),(1,5),(1,6),
+  (1,7),(1,8),(1,9),(1,10),(1,11),(1,12),(1,13),
+(2,0),(2,1),(2,2),(2,3),(2,4),(2,5),(2,6),
+  (2,7),(2,8),(2,9),(2,10),(2,11),(2,12),(2,13),
+(3,0),(3,1),(3,2),(3,3),(3,4),(3,5),(3,6),
+  (3,7),(3,8),(3,9),(3,10),(3,11),(3,12),(3,13);
+insert into t1 (a,b) select a, max(b)+1 from t1 where a = 0 group by a;
+select * from t1;
+explain extended select sql_buffer_result a, max(b)+1 from t1 where a = 0 group by a;
+drop table t1;
+
+
+#
+# Bug #41610: key_infix_len can be overwritten causing some group by queries
+# to return no rows
+#
+
+CREATE TABLE t1 (a int, b int, c int, d int,
+  KEY foo (c,d,a,b), KEY bar (c,a,b,d));
+
+INSERT INTO t1 VALUES (1, 1, 1, 1), (1, 1, 1, 2), (1, 1, 1, 3), (1, 1, 1, 4);
+INSERT INTO t1 SELECT * FROM t1;
+INSERT INTO t1 SELECT * FROM t1;
+INSERT INTO t1 SELECT a,b,c+1,d FROM t1;
+ANALYZE TABLE t1;
+
+#Should be non-empty
+EXPLAIN SELECT DISTINCT c FROM t1 WHERE d=4;
+SELECT DISTINCT c FROM t1 WHERE d=4;
+
+DROP TABLE t1;
+
+--echo #
+--echo # Bug #45386: Wrong query result with MIN function in field list, 
+--echo #  WHERE and GROUP BY clause
+--echo #
+
+CREATE TABLE t (a INT, b INT, INDEX (a,b));
+INSERT INTO t VALUES (2,0), (2,0), (2,1), (2,1);
+INSERT INTO t SELECT * FROM t;
+INSERT INTO t SELECT * FROM t;
+ANALYZE TABLE t;
+
+--echo # test MIN
+--echo #should use range with index for group by
+EXPLAIN
+SELECT a, MIN(b) FROM t WHERE b <> 0 GROUP BY a;
+--echo #should return 1 row
+SELECT a, MIN(b) FROM t WHERE b <> 0 GROUP BY a;
+
+--echo # test MAX
+--echo #should use range with index for group by
+EXPLAIN
+SELECT a, MAX(b) FROM t WHERE b <> 1 GROUP BY a;
+--echo #should return 1 row
+SELECT a, MAX(b) FROM t WHERE b <> 1 GROUP BY a;
+
+--echo # test 3 ranges and use the middle one
+INSERT INTO t SELECT a, 2 FROM t;
+
+--echo #should use range with index for group by
+EXPLAIN
+SELECT a, MAX(b) FROM t WHERE b > 0 AND b < 2 GROUP BY a;
+--echo #should return 1 row
+SELECT a, MAX(b) FROM t WHERE b > 0 AND b < 2 GROUP BY a;
+
+DROP TABLE t;
+
+--echo #
+--echo # Bug #48472: Loose index scan inappropriately chosen for some WHERE
+--echo #             conditions
+--echo # 
+
+CREATE TABLE t (a INT, b INT, INDEX (a,b));
+INSERT INTO t VALUES (2,0), (2,0), (2,1), (2,1);
+INSERT INTO t SELECT * FROM t;                                   
+
+SELECT a, MAX(b) FROM t WHERE 0=b+0 GROUP BY a;
+
+DROP TABLE t;
+
+--echo End of 5.0 tests
+
+--echo #
+--echo # Bug #46607: Assertion failed: (cond_type == Item::FUNC_ITEM) results in
+--echo #              server crash
+--echo #
+
+CREATE TABLE t (a INT, b INT, INDEX (a,b));
+INSERT INTO t VALUES (2,0), (2,0), (2,1), (2,1);
+INSERT INTO t SELECT * FROM t;
+
+SELECT a, MAX(b) FROM t WHERE b GROUP BY a;
+
+DROP TABLE t;
+
+#
+# BUG#49902 - SELECT returns incorrect results
+#
+CREATE TABLE t1(a INT NOT NULL, b INT NOT NULL, KEY (b));
+INSERT INTO t1 VALUES(1,1),(2,1);
+ANALYZE TABLE t1;
+SELECT 1 AS c, b FROM t1 WHERE b IN (1,2) GROUP BY c, b;
+SELECT a FROM t1 WHERE b=1;
+DROP TABLE t1;
+
+--echo # 
+--echo # Bug#47762: Incorrect result from MIN() when WHERE tests NOT NULL column
+--echo #            for NULL
+--echo #
+
+--echo ## Test for NULLs allowed
+CREATE TABLE t1 ( a INT, KEY (a) );
+INSERT INTO t1 VALUES (1), (2), (3);
+--source include/min_null_cond.inc
+INSERT INTO t1 VALUES (NULL), (NULL);
+--source include/min_null_cond.inc
+DROP TABLE t1;
+
+--echo ## Test for NOT NULLs
+CREATE TABLE t1 ( a INT NOT NULL PRIMARY KEY);
+INSERT INTO t1 VALUES (1), (2), (3);
+--echo #
+--echo # NULL-safe operator test disabled for non-NULL indexed columns.
+--echo #
+--echo # See bugs
+--echo #
+--echo # - Bug#52173: Reading NULL value from non-NULL index gives
+--echo #   wrong result in embedded server 
+--echo #
+--echo # - Bug#52174: Sometimes wrong plan when reading a MAX value from 
+--echo #   non-NULL index
+--echo #
+--let $skip_null_safe_test= 1
+--source include/min_null_cond.inc
+DROP TABLE t1;
+
+--echo #
+--echo # Bug#53859: Valgrind: opt_sum_query(TABLE_LIST*, List<Item>&, Item*) at
+--echo # opt_sum.cc:305
+--echo #
+CREATE TABLE t1 ( a INT, KEY (a) );
+INSERT INTO t1 VALUES (1), (2), (3); 
+
+SELECT MIN( a ) AS min_a
+FROM t1
+WHERE a > 1 AND a IS NULL
+ORDER BY min_a;
+
+DROP TABLE t1;
+
+#
+# MDEV-729 lp:998028 - Server crashes on normal shutdown in closefrm after executing a query from MyISAM table
+#
+create table t1 (a int, b varchar(1), key(b,a)) engine=myisam;
+insert t1 values (1,'a'),(2,'b'),(3,'c'),(4,'d'),(5,'e'),(6,'f'),(7,'g'),(8,'h'),(null,'i');
+select min(a), b from t1 where a=7 or b='z' group by b;
+flush tables;
+drop table t1;
+
+--echo #
+--echo # LP BUG#888456 Wrong result with DISTINCT , ANY , subquery_cache=off , NOT NULL
+--echo #
+
+CREATE TABLE t1 ( a int NOT NULL) ;
+INSERT INTO t1 VALUES (28),(29),(9);
+
+CREATE TABLE t2 ( a int, KEY (a)) ;
+INSERT INTO t2 VALUES (1),(1),(1),(4),(4),(5),(5),(8),(8),(9);
+
+explain select (select t2.a from t2 where t2.a >= t1.a group by t2.a) from t1;
+select (select t2.a from t2 where t2.a >= t1.a group by t2.a) from t1;
+
+drop table t1, t2;
+
+--echo #
+--echo # LP BUG#900375 Wrong result with derived_merge=ON, DISTINCT or GROUP BY, EXISTS
+--echo #
+
+CREATE TABLE t1 ( a INT, b INT, KEY (b) );
+INSERT INTO t1 VALUES
+(100,10),(101,11),(102,12),(103,13),(104,14),
+(105,15),(106,16),(107,17),(108,18),(109,19);
+
+EXPLAIN
+SELECT alias1.* FROM t1, (SELECT * FROM t1) AS alias1
+WHERE EXISTS ( SELECT DISTINCT b FROM t1 WHERE b <= alias1.a ) ;
+SELECT alias1.* FROM t1, (SELECT * FROM t1) AS alias1
+WHERE EXISTS ( SELECT DISTINCT b FROM t1 WHERE b <= alias1.a ) ;
+
+EXPLAIN
+SELECT alias1.* FROM t1, t1 AS alias1
+WHERE EXISTS ( SELECT DISTINCT b FROM t1 WHERE b <= alias1.a ) ;
+SELECT alias1.* FROM t1, t1 AS alias1
+WHERE EXISTS ( SELECT DISTINCT b FROM t1 WHERE b <= alias1.a ) ;
+
+drop table t1;
+
+--echo End of 5.1 tests
+
+--echo #
+--echo # MDEV-765 lp:825075 - Wrong result with GROUP BY + multipart key + MIN/MAX loose scan
+--echo #
+
+CREATE TABLE t1 (a varchar(1), b varchar(1), KEY (b,a));
+INSERT INTO t1 VALUES
+('0',NULL),('9',NULL),('8','c'),('4','d'),('7','d'),(NULL,'f'),
+('7','f'),('8','g'),(NULL,'j');
+
+explain
+SELECT max(a) , b FROM t1 WHERE a IS NULL OR b = 'z' GROUP BY b; 
+SELECT max(a) , b FROM t1 WHERE a IS NULL OR b = 'z' GROUP BY b; 
+
+explain
+SELECT b, min(a) FROM t1 WHERE a = '7' OR b = 'z' GROUP BY b;
+SELECT b, min(a) FROM t1 WHERE a = '7' OR b = 'z' GROUP BY b;
+
+explain
+SELECT b, min(a) FROM t1 WHERE (a = b OR b = 'd' OR b is NULL) GROUP BY b;
+SELECT b, min(a) FROM t1 WHERE (a = b OR b = 'd' OR b is NULL) GROUP BY b;
+
+explain
+SELECT b, min(a) FROM t1 WHERE a > ('0' = b) AND b = 'z' GROUP BY b;
+SELECT b, min(a) FROM t1 WHERE a > ('0' = b) AND b = 'z' GROUP BY b;
+
+explain
+SELECT b, min(a) FROM t1 WHERE a > '0' AND (b < (a = '7')) GROUP BY b;
+SELECT b, min(a) FROM t1 WHERE a > '0' AND (b < (a = '7')) GROUP BY b;
+
+explain
+SELECT b, min(a) FROM t1 WHERE (a > '0' AND (a > '1' OR b = 'd')) GROUP BY b;
+SELECT b, min(a) FROM t1 WHERE (a > '0' AND (a > '1' OR b = 'd')) GROUP BY b;
+
+drop table t1;
+
+--echo #
+--echo # MDEV-4140 Wrong result with GROUP BY + multipart key + MIN/MAX loose scan and a subquery
+--echo #
+
+CREATE TABLE t1 (a int, b int, KEY (b, a)) ;
+INSERT INTO t1 VALUES (0,99),(9,99),(4,0),(7,0),(99,0),(7,0),(8,0),(99,0),(1,0);
+INSERT INTO t1 VALUES (0,99),(9,99),(4,0),(7,0),(99,0),(7,0),(8,0),(99,0),(1,0);
+CREATE TABLE t2 (c int) ;
+INSERT INTO t2 VALUES (0),(1);
+ANALYZE TABLE t1,t2;
+
+EXPLAIN
+SELECT MIN(a), b FROM t1 WHERE a > 0 GROUP BY b;
+SELECT MIN(a), b FROM t1 WHERE a > 0 GROUP BY b;
+EXPLAIN
+SELECT MIN(a), b FROM t1 WHERE a > ( SELECT c FROM t2 WHERE c = 0 ) GROUP BY b;
+SELECT MIN(a), b FROM t1 WHERE a > ( SELECT c FROM t2 WHERE c = 0 ) GROUP BY b;
+# this test is for 5.5 to ensure that the subquery is expensive
+EXPLAIN
+SELECT MIN(a), b FROM t1 WHERE a > ( SELECT min(c) FROM t2, t1 t1a, t1 t1b WHERE c = 0 ) GROUP BY b;
+SELECT MIN(a), b FROM t1 WHERE a > ( SELECT min(c) FROM t2, t1 t1a, t1 t1b WHERE c = 0 ) GROUP BY b;
+
+drop table t1, t2;
+
+--echo End of 5.3 tests
+
+--echo #
+--echo # WL#3220 (Loose index scan for COUNT DISTINCT)
+--echo #
+
+CREATE TABLE t1 (a INT, b INT, c INT, KEY (a,b));
+INSERT INTO t1 VALUES (1,1,1), (1,2,1), (1,3,1), (1,4,1);
+INSERT INTO t1 SELECT * FROM t1;
+INSERT INTO t1 SELECT * FROM t1;
+INSERT INTO t1 SELECT * FROM t1;
+INSERT INTO t1 SELECT a, b + 4, 1 FROM t1;
+INSERT INTO t1 SELECT a, b + 8, 1 FROM t1;
+INSERT INTO t1 SELECT a + 1, b, 1 FROM t1;
+CREATE TABLE t2 (a INT, b INT, c INT, d INT, e INT, f INT, KEY (a,b,c));
+INSERT INTO t2 VALUES
+  (1,1,1,1,1,1), (1,2,1,1,1,1), (1,3,1,1,1,1), (1,4,1,1,1,1);
+INSERT INTO t2 SELECT * FROM t2;
+INSERT INTO t2 SELECT * FROM t2;
+INSERT INTO t2 SELECT * FROM t2;
+INSERT INTO t2 SELECT * FROM t2;
+INSERT INTO t2 SELECT a, b + 4, c,d,e,f FROM t2;
+INSERT INTO t2 SELECT a + 1, b, c,d,e,f FROM t2;
+ANALYZE TABLE t1,t2;
+
+EXPLAIN SELECT COUNT(DISTINCT a) FROM t1;
+SELECT COUNT(DISTINCT a) FROM t1;
+
+EXPLAIN SELECT COUNT(DISTINCT a,b) FROM t1;
+SELECT COUNT(DISTINCT a,b) FROM t1;
+
+EXPLAIN SELECT COUNT(DISTINCT b,a) FROM t1;
+SELECT COUNT(DISTINCT b,a) FROM t1;
+
+EXPLAIN SELECT COUNT(DISTINCT b) FROM t1;
+SELECT COUNT(DISTINCT b) FROM t1;
+
+EXPLAIN SELECT COUNT(DISTINCT a) FROM t1 GROUP BY a;
+SELECT COUNT(DISTINCT a) FROM t1 GROUP BY a;
+
+EXPLAIN SELECT COUNT(DISTINCT b) FROM t1 GROUP BY a;
+SELECT COUNT(DISTINCT b) FROM t1 GROUP BY a;
+
+EXPLAIN SELECT COUNT(DISTINCT a) FROM t1 GROUP BY b;
+SELECT COUNT(DISTINCT a) FROM t1 GROUP BY b;
+
+EXPLAIN SELECT DISTINCT COUNT(DISTINCT a) FROM t1;
+SELECT DISTINCT COUNT(DISTINCT a) FROM t1;
+
+EXPLAIN SELECT COUNT(DISTINCT a, b + 0) FROM t1;
+SELECT COUNT(DISTINCT a, b + 0) FROM t1;
+
+EXPLAIN SELECT COUNT(DISTINCT a) FROM t1 HAVING COUNT(DISTINCT b) < 10;
+SELECT COUNT(DISTINCT a) FROM t1 HAVING COUNT(DISTINCT b) < 10;
+
+EXPLAIN SELECT COUNT(DISTINCT a) FROM t1 HAVING COUNT(DISTINCT c) < 10;
+SELECT COUNT(DISTINCT a) FROM t1 HAVING COUNT(DISTINCT c) < 10;
+
+EXPLAIN SELECT 1 FROM t1 HAVING COUNT(DISTINCT a) < 10;
+SELECT 1 FROM t1 HAVING COUNT(DISTINCT a) < 10;
+
+EXPLAIN SELECT 1 FROM t1 GROUP BY a HAVING COUNT(DISTINCT b) > 1;
+SELECT 1 FROM t1 GROUP BY a HAVING COUNT(DISTINCT b) > 1;
+
+EXPLAIN SELECT COUNT(DISTINCT t1_1.a) FROM t1 t1_1, t1 t1_2 GROUP BY t1_1.a;
+SELECT COUNT(DISTINCT t1_1.a) FROM t1 t1_1, t1 t1_2 GROUP BY t1_1.a;
+
+EXPLAIN SELECT COUNT(DISTINCT a), 12 FROM t1;
+SELECT COUNT(DISTINCT a), 12 FROM t1;
+
+EXPLAIN SELECT COUNT(DISTINCT a, b, c) FROM t2;
+SELECT COUNT(DISTINCT a, b, c) FROM t2;
+
+EXPLAIN SELECT COUNT(DISTINCT a), SUM(DISTINCT a), AVG(DISTINCT a) FROM t2;
+SELECT COUNT(DISTINCT a), SUM(DISTINCT a), AVG(DISTINCT a) FROM t2;
+
+EXPLAIN SELECT COUNT(DISTINCT a), SUM(DISTINCT a), AVG(DISTINCT f) FROM t2;
+SELECT COUNT(DISTINCT a), SUM(DISTINCT a), AVG(DISTINCT f) FROM t2;
+
+EXPLAIN SELECT COUNT(DISTINCT a, b), COUNT(DISTINCT b, a) FROM t2;
+SELECT COUNT(DISTINCT a, b), COUNT(DISTINCT b, a) FROM t2;
+
+EXPLAIN SELECT COUNT(DISTINCT a, b), COUNT(DISTINCT b, f) FROM t2;
+SELECT COUNT(DISTINCT a, b), COUNT(DISTINCT b, f) FROM t2;
+
+EXPLAIN SELECT COUNT(DISTINCT a, b), COUNT(DISTINCT b, d) FROM t2;
+SELECT COUNT(DISTINCT a, b), COUNT(DISTINCT b, d) FROM t2;
+
+EXPLAIN SELECT a, c, COUNT(DISTINCT c, a, b) FROM t2 GROUP BY a, b, c;
+SELECT a, c, COUNT(DISTINCT c, a, b) FROM t2 GROUP BY a, b, c;
+
+EXPLAIN SELECT COUNT(DISTINCT c, a, b) FROM t2
+  WHERE a > 5 AND b BETWEEN 10 AND 20 GROUP BY a, b, c;
+SELECT COUNT(DISTINCT c, a, b) FROM t2
+  WHERE a > 5 AND b BETWEEN 10 AND 20 GROUP BY a, b, c;
+
+EXPLAIN SELECT COUNT(DISTINCT b), SUM(DISTINCT b) FROM t2 WHERE a = 5
+  GROUP BY b;
+SELECT COUNT(DISTINCT b), SUM(DISTINCT b) FROM t2 WHERE a = 5
+  GROUP BY b;
+
+EXPLAIN SELECT a, COUNT(DISTINCT b), SUM(DISTINCT b) FROM t2 GROUP BY a;
+SELECT a, COUNT(DISTINCT b), SUM(DISTINCT b) FROM t2 GROUP BY a;
+
+EXPLAIN SELECT COUNT(DISTINCT b), SUM(DISTINCT b) FROM t2 GROUP BY a;
+SELECT COUNT(DISTINCT b), SUM(DISTINCT b) FROM t2 GROUP BY a;
+
+EXPLAIN SELECT COUNT(DISTINCT a, b) FROM t2 WHERE c = 13 AND d = 42;
+SELECT COUNT(DISTINCT a, b) FROM t2 WHERE c = 13 AND d = 42;
+
+EXPLAIN SELECT a, COUNT(DISTINCT a), SUM(DISTINCT a) FROM t2
+  WHERE b = 13 AND c = 42 GROUP BY a;
+SELECT a, COUNT(DISTINCT a), SUM(DISTINCT a) FROM t2
+  WHERE b = 13 AND c = 42 GROUP BY a;
+
+# This query could have been resolved using loose index scan since the second
+# part of count(..) is defined by a constant predicate
+EXPLAIN SELECT COUNT(DISTINCT a, b), SUM(DISTINCT a) FROM t2 WHERE b = 42;
+SELECT COUNT(DISTINCT a, b), SUM(DISTINCT a) FROM t2 WHERE b = 42;
+
+EXPLAIN SELECT SUM(DISTINCT a), MAX(b) FROM t2 GROUP BY a;
+SELECT SUM(DISTINCT a), MAX(b) FROM t2 GROUP BY a;
+
+EXPLAIN SELECT 42 * (a + c + COUNT(DISTINCT c, a, b)) FROM t2 GROUP BY a, b, c;
+SELECT 42 * (a + c + COUNT(DISTINCT c, a, b)) FROM t2 GROUP BY a, b, c;
+
+EXPLAIN SELECT (SUM(DISTINCT a) + MAX(b)) FROM t2 GROUP BY a;
+SELECT (SUM(DISTINCT a) + MAX(b)) FROM t2 GROUP BY a;
+
+DROP TABLE t1,t2;
+
+--echo # end of WL#3220 tests
+
+--echo #
+--echo # Bug#50539: Wrong result when loose index scan is used for an aggregate
+--echo #            function with distinct
+--echo #
+CREATE TABLE t1 (
+  f1 int(11) NOT NULL DEFAULT '0',
+  f2 char(1) NOT NULL DEFAULT '',
+  KEY (f1,f2)
+) ;
+insert into t1 values(1,'A'),(1 , 'B'), (1, 'C'), (2, 'A'), 
+(3, 'A'), (3, 'B'), (3, 'C'), (3, 'D');
+
+SELECT f1, COUNT(DISTINCT f2) FROM t1 GROUP BY f1;
+explain SELECT f1, COUNT(DISTINCT f2) FROM t1 GROUP BY f1;
+ 
+drop table t1;
+--echo # End of test#50539.
+
+--echo #
+--echo # Bug#17217128 -  BAD INTERACTION BETWEEN MIN/MAX AND
+--echo #                 "HAVING SUM(DISTINCT)": WRONG RESULTS.
+--echo #
+
+CREATE TABLE t (a INT, b INT, KEY(a,b));
+INSERT INTO t VALUES (1,1), (2,2), (3,3), (4,4), (1,0), (3,2), (4,5);
+ANALYZE TABLE t;
+
+SELECT a, SUM(DISTINCT a), MIN(b) FROM t GROUP BY a;
+EXPLAIN SELECT a, SUM(DISTINCT a), MIN(b) FROM t GROUP BY a;
+
+SELECT a, SUM(DISTINCT a), MAX(b) FROM t GROUP BY a;
+EXPLAIN SELECT a, SUM(DISTINCT a), MAX(b) FROM t GROUP BY a;
+
+SELECT a, MAX(b) FROM t GROUP BY a HAVING SUM(DISTINCT a);
+EXPLAIN SELECT a, MAX(b) FROM t GROUP BY a HAVING SUM(DISTINCT a);
+
+SELECT SUM(DISTINCT a), MIN(b), MAX(b) FROM t;
+EXPLAIN SELECT SUM(DISTINCT a), MIN(b), MAX(b) FROM t;
+
+SELECT a, SUM(DISTINCT a), MIN(b), MAX(b) FROM t GROUP BY a;
+EXPLAIN SELECT a, SUM(DISTINCT a), MIN(b), MAX(b) FROM t GROUP BY a;
+DROP TABLE t;
+
+--echo #
+--echo # MDEV-4219 A simple select query returns random data (upstream bug#68473)
+--echo #
+
+--disable_warnings
+drop table if exists faulty;
+--enable_warnings
+
+# MySQL's test case
+
+CREATE TABLE faulty (
+a int(11) unsigned NOT NULL AUTO_INCREMENT,
+b int(11) unsigned NOT NULL,
+c datetime NOT NULL,
+PRIMARY KEY (a),
+UNIQUE KEY b_and_c (b,c)
+);
+
+INSERT INTO faulty (b, c) VALUES
+(1801, '2013-02-15 09:00:00'),
+(1802, '2013-02-28 09:00:00'),
+(1802, '2013-03-01 09:00:00'),
+(5,    '1990-02-15 09:00:00'),
+(5,    '2013-02-15 09:00:00'),
+(5,    '2009-02-15 17:00:00');
+
+EXPLAIN
+SELECT DISTINCT b, c FROM faulty WHERE b='1802' ORDER BY c;
+SELECT DISTINCT b, c FROM faulty WHERE b='1802' ORDER BY c;
+
+drop table faulty;
+
+# MariaDB test case
+
+CREATE TABLE t1 (a INT, b INT);
+INSERT INTO t1 (a, b) VALUES (1,1), (1,2), (1,3);
+INSERT INTO t1 SELECT * FROM t1;
+INSERT INTO t1 SELECT a + 1, b FROM t1;
+INSERT INTO t1 SELECT a + 2, b FROM t1;
+ANALYZE TABLE t1;
+
+CREATE INDEX break_it ON t1 (a, b);
+
+EXPLAIN
+SELECT distinct a, b FROM t1 where a = '3' ORDER BY b; 
+SELECT distinct a, b FROM t1 where a = '3' ORDER BY b; 
+
+drop table t1;
+
+--echo #
+--echo # Start of 10.0 tests
+--echo #
+
+--echo #
+--echo # MDEV-6991 GROUP_MIN_MAX optimization is erroneously applied in some cases
+--echo #
+CREATE TABLE t1 (id INT NOT NULL, a VARCHAR(20)) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (1,'2001-01-01');
+INSERT INTO t1 VALUES (1,'2001-01-02');
+INSERT INTO t1 VALUES (1,'2001-01-03');
+INSERT INTO t1 VALUES (1,' 2001-01-04');
+INSERT INTO t1 VALUES (2,'2001-01-01');
+INSERT INTO t1 VALUES (2,'2001-01-02');
+INSERT INTO t1 VALUES (2,'2001-01-03');
+INSERT INTO t1 VALUES (2,' 2001-01-04');
+INSERT INTO t1 VALUES (3,'2001-01-01');
+INSERT INTO t1 VALUES (3,'2001-01-02');
+INSERT INTO t1 VALUES (3,'2001-01-03');
+INSERT INTO t1 VALUES (3,' 2001-01-04');
+INSERT INTO t1 VALUES (4,'2001-01-01');
+INSERT INTO t1 VALUES (4,'2001-01-02');
+INSERT INTO t1 VALUES (4,'2001-01-03');
+INSERT INTO t1 VALUES (4,' 2001-01-04');
+SELECT id,MIN(a),MAX(a) FROM t1 WHERE a>=DATE'2001-01-04' GROUP BY id;
+ALTER TABLE t1 ADD KEY(id,a);
+SELECT id,MIN(a),MAX(a) FROM t1 WHERE a>=DATE'2001-01-04' GROUP BY id;
+DROP TABLE t1;
+
+--echo #
+--echo # MDEV-17039: Query plan changes when we use GROUP BY optimization with optimizer_use_condition_selectivity=4
+--echo # and use_stat_tables= PREFERABLY
+--echo #
+
+CREATE TABLE t1 (a INT, b INT,c INT DEFAULT 0, INDEX (a,b));
+INSERT INTO t1 (a, b) VALUES (1,1), (1,2), (1,3), (1,4), (1,5),
+(2,2), (2,3), (2,1), (3,1), (4,1), (4,2), (4,3), (4,4), (4,5), (4,6);
+INSERT INTO t1 SELECT * FROM t1;
+ANALYZE TABLE t1;
+set @save_optimizer_use_condition_selectivity= @@optimizer_use_condition_selectivity;
+set @save_use_stat_tables= @@use_stat_tables;
+set @@optimizer_use_condition_selectivity=4;
+set @@use_stat_tables=PREFERABLY;
+explain extended SELECT a FROM t1 AS t1_outer WHERE a IN (SELECT max(b) FROM t1  GROUP BY a); 
+set @@optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
+set @@use_stat_tables=@save_use_stat_tables;
+explain extended SELECT a FROM t1 AS t1_outer WHERE a IN (SELECT max(b) FROM t1   GROUP BY a); 
+drop table t1; 
+
+--echo #
+--echo # End of 10.0 tests
+--echo #
+
+
+--echo #
+--echo # Start of 10.1 tests
+--echo #
+
+--echo #
+--echo # MDEV-6990 GROUP_MIN_MAX optimization is not applied in some cases when it could
+--echo #
+CREATE TABLE t1 (id INT NOT NULL, a DATE, KEY(id,a)) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (1,'2001-01-01');
+INSERT INTO t1 VALUES (1,'2001-01-02');
+INSERT INTO t1 VALUES (1,'2001-01-03');
+INSERT INTO t1 VALUES (1,'2001-01-04');
+INSERT INTO t1 VALUES (2,'2001-01-01');
+INSERT INTO t1 VALUES (2,'2001-01-02');
+INSERT INTO t1 VALUES (2,'2001-01-03');
+INSERT INTO t1 VALUES (2,'2001-01-04');
+INSERT INTO t1 VALUES (3,'2001-01-01');
+INSERT INTO t1 VALUES (3,'2001-01-02');
+INSERT INTO t1 VALUES (3,'2001-01-03');
+INSERT INTO t1 VALUES (3,'2001-01-04');
+INSERT INTO t1 VALUES (4,'2001-01-01');
+INSERT INTO t1 VALUES (4,'2001-01-02');
+INSERT INTO t1 VALUES (4,'2001-01-03');
+INSERT INTO t1 VALUES (4,'2001-01-04');
+ANALYZE TABLE t1;
+EXPLAIN SELECT id,MIN(a),MAX(a) FROM t1 WHERE a>='2001-01-04' GROUP BY id;
+EXPLAIN SELECT id,MIN(a),MAX(a) FROM t1 WHERE a>=20010104.0 GROUP BY id;
+EXPLAIN SELECT id,MIN(a),MAX(a) FROM t1 WHERE a>=20010104e0 GROUP BY id;
+SELECT id,MIN(a),MAX(a) FROM t1 WHERE a>='2001-01-04' GROUP BY id;
+SELECT id,MIN(a),MAX(a) FROM t1 WHERE a>=20010104.0 GROUP BY id;
+SELECT id,MIN(a),MAX(a) FROM t1 WHERE a>=20010104e0 GROUP BY id;
+DROP TABLE t1;
+
+--echo #
+--echo # MDEV-8229 GROUP_MIN_MAX is erroneously applied for BETWEEN in some cases
+--echo #
+SET NAMES latin1;
+CREATE TABLE t1 (id INT NOT NULL, a VARCHAR(20)) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (1,'2001-01-01');
+INSERT INTO t1 VALUES (1,'2001-01-02');
+INSERT INTO t1 VALUES (1,'2001-01-03');
+INSERT INTO t1 VALUES (1,' 2001-01-04');
+INSERT INTO t1 VALUES (2,'2001-01-01');
+INSERT INTO t1 VALUES (2,'2001-01-02');
+INSERT INTO t1 VALUES (2,'2001-01-03');
+INSERT INTO t1 VALUES (2,' 2001-01-04');
+INSERT INTO t1 VALUES (3,'2001-01-01');
+INSERT INTO t1 VALUES (3,'2001-01-02');
+INSERT INTO t1 VALUES (3,'2001-01-03');
+INSERT INTO t1 VALUES (3,' 2001-01-04');
+INSERT INTO t1 VALUES (4,'2001-01-01');
+INSERT INTO t1 VALUES (4,'2001-01-02');
+INSERT INTO t1 VALUES (4,'2001-01-03');
+INSERT INTO t1 VALUES (4,' 2001-01-04');
+INSERT INTO t1 SELECT * FROM t1;
+INSERT INTO t1 SELECT * FROM t1;
+ANALYZE TABLE t1;
+SELECT id,MIN(a),MAX(a) FROM t1 WHERE a BETWEEN     ' 2001-01-04' AND    '2001-01-05' GROUP BY id;
+SELECT id,MIN(a),MAX(a) FROM t1 WHERE a BETWEEN     '2001-01-04' AND     '2001-01-05' GROUP BY id;
+SELECT id,MIN(a),MAX(a) FROM t1 WHERE a BETWEEN DATE'2001-01-04' AND DATE'2001-01-05' GROUP BY id;
+SELECT id,MIN(a),MAX(a) FROM t1 WHERE a BETWEEN DATE'2001-01-04' AND     '2001-01-05' GROUP BY id;
+SELECT id,MIN(a),MAX(a) FROM t1 WHERE a BETWEEN     '2001-01-04' AND DATE'2001-01-05' GROUP BY id;
+ALTER TABLE t1 ADD KEY(id,a);
+SELECT id,MIN(a),MAX(a) FROM t1 WHERE a BETWEEN     ' 2001-01-04' AND    '2001-01-05' GROUP BY id;
+SELECT id,MIN(a),MAX(a) FROM t1 WHERE a BETWEEN     '2001-01-04' AND     '2001-01-05' GROUP BY id;
+SELECT id,MIN(a),MAX(a) FROM t1 WHERE a BETWEEN DATE'2001-01-04' AND DATE'2001-01-05' GROUP BY id;
+SELECT id,MIN(a),MAX(a) FROM t1 WHERE a BETWEEN DATE'2001-01-04' AND     '2001-01-05' GROUP BY id;
+SELECT id,MIN(a),MAX(a) FROM t1 WHERE a BETWEEN     '2001-01-04' AND DATE'2001-01-05' GROUP BY id;
+EXPLAIN SELECT id,MIN(a),MAX(a) FROM t1 WHERE a BETWEEN     ' 2001-01-04' AND    '2001-01-05' GROUP BY id;
+EXPLAIN SELECT id,MIN(a),MAX(a) FROM t1 WHERE a BETWEEN     '2001-01-04' AND     '2001-01-05' GROUP BY id;
+EXPLAIN SELECT id,MIN(a),MAX(a) FROM t1 WHERE a BETWEEN DATE'2001-01-04' AND DATE'2001-01-05' GROUP BY id;
+EXPLAIN SELECT id,MIN(a),MAX(a) FROM t1 WHERE a BETWEEN DATE'2001-01-04' AND     '2001-01-05' GROUP BY id;
+EXPLAIN SELECT id,MIN(a),MAX(a) FROM t1 WHERE a BETWEEN     '2001-01-04' AND DATE'2001-01-05' GROUP BY id;
+DROP TABLE t1;
+
+--echo #
+--echo # MIN() optimization didn't work correctly with BETWEEN when using too
+--echo # long strings.
+--echo #
+
+create table t1 (a varchar(10), key (a)) engine=myisam;
+insert into t1 values("bar"),("Cafe");
+explain select min(a) from t1 where a between "a" and "Cafe2";
+explain select min(a) from t1 where a between "a" and "Cafeeeeeeeeeeeeeeeeeeeeeeeeee";
+explain select min(a) from t1 where a between "abbbbbbbbbbbbbbbbbbbb" and "Cafe2";
+drop table t1;
+
+--echo #
+--echo # MDEV-15433: Optimizer does not use group by optimization with distinct
+--echo #
+
+CREATE TABLE t1 (id INT NOT NULL AUTO_INCREMENT PRIMARY KEY, a INT NOT NULL, KEY(a));
+--disable_query_log
+INSERT INTO t1(a) VALUES (1), (2), (3), (4);
+INSERT INTO t1(a) SELECT a FROM t1;
+INSERT INTO t1(a) SELECT a FROM t1;
+INSERT INTO t1(a) SELECT a FROM t1;
+INSERT INTO t1(a) SELECT a FROM t1;
+INSERT INTO t1(a) SELECT a FROM t1;
+INSERT INTO t1(a) SELECT a FROM t1;
+INSERT INTO t1(a) SELECT a FROM t1;
+INSERT INTO t1(a) SELECT a FROM t1;
+INSERT INTO t1(a) SELECT a FROM t1;
+INSERT INTO t1(a) SELECT a FROM t1;
+INSERT INTO t1(a) SELECT a FROM t1;
+INSERT INTO t1(a) SELECT a FROM t1;
+INSERT INTO t1(a) SELECT a FROM t1;
+INSERT INTO t1(a) SELECT a FROM t1;
+--enable_query_log
+OPTIMIZE TABLE t1;
+EXPLAIN SELECT DISTINCT a FROM t1;
+SELECT DISTINCT a FROM t1;
+drop table t1;
+
+--echo #
+--echo # End of 10.1 tests
+--echo #
+
+--echo #
+--echo # MDEV-6768 Wrong result with agregate with join with no resultset
+--echo #
+
+create table t1
+(
+	PARENT_ID int(10) unsigned NOT NULL AUTO_INCREMENT,
+	PARENT_FIELD VARCHAR(10),
+	PRIMARY KEY (PARENT_ID)
+) engine=innodb;
+
+create table t2
+(
+	CHILD_ID INT NOT NULL AUTO_INCREMENT,
+	PARENT_ID INT NOT NULL,
+	CHILD_FIELD varchar(10),
+	PRIMARY KEY (CHILD_ID)
+)engine=innodb;
+
+INSERT INTO t1 (PARENT_FIELD)
+SELECT 'AAAA';
+
+INSERT INTO t2 (PARENT_ID, CHILD_FIELD)
+SELECT 1, 'BBBB';
+
+explain select
+ t1.PARENT_ID,
+ min(CHILD_FIELD)
+ from t1 straight_join t2
+ where t1.PARENT_ID = 1
+ and t1.PARENT_ID = t2.PARENT_ID
+ and t2.CHILD_FIELD = "ZZZZ";
+
+select
+ t1.PARENT_ID,
+ min(CHILD_FIELD)
+ from t1 straight_join t2
+ where t1.PARENT_ID = 1
+ and t1.PARENT_ID = t2.PARENT_ID
+ and t2.CHILD_FIELD = "ZZZZ";
+
+select
+ 1,
+ min(CHILD_FIELD)
+ from t1 straight_join t2
+ where t1.PARENT_ID = 1
+ and t1.PARENT_ID = t2.PARENT_ID
+ and t2.CHILD_FIELD = "ZZZZ";
+
+select
+ IFNULL(t1.PARENT_ID,1),
+ min(CHILD_FIELD)
+ from t1 straight_join t2
+ where t1.PARENT_ID = 1
+ and t1.PARENT_ID = t2.PARENT_ID
+ and t2.CHILD_FIELD = "ZZZZ";
+
+
+--echo # Check that things works with MyISAM (which has different explain)
+
+alter table t1 engine=myisam;
+alter table t2 engine=myisam;
+
+explain select
+ t1.PARENT_ID,
+ min(CHILD_FIELD)
+ from t1 straight_join t2
+ where t1.PARENT_ID = 1
+ and t1.PARENT_ID = t2.PARENT_ID
+ and t2.CHILD_FIELD = "ZZZZ";
+
+select
+ t1.PARENT_ID,
+ min(CHILD_FIELD)
+ from t1 straight_join t2
+ where t1.PARENT_ID = 1
+ and t1.PARENT_ID = t2.PARENT_ID
+ and t2.CHILD_FIELD = "ZZZZ";
+
+drop table t1,t2;
+
+--echo # Check that things works if sub queries are re-executed
+
+create table t1 (a int primary key, b int);
+create table t2 (a int primary key, b int);
+create table t3 (a int primary key, b int);
+
+insert into t1 values (1,1),(2,2),(3,3);
+insert into t2 values (1,1),(2,2),(3,3);
+insert into t3 values (1,1),(3,3);
+
+explain
+select *,
+   (select
+        CONCAT('t2:',       IFNULL(t2.a,      't2a-null'), ';',
+               'min_t3_b:', IFNULL(min(t3.b), 't3b-null'))
+    from t2,t3
+    where t2.a=1 and t1.b = t3.a) as s1
+from t1;
+
+select *,
+   (select
+        CONCAT('t2:',       IFNULL(t2.a,      't2a-null'), ';',
+               'min_t3_b:', IFNULL(min(t3.b), 't3b-null'))
+    from t2,t3
+    where t2.a=1 and t1.b = t3.a) as s1
+from t1;
+
+drop table t1,t2,t3;
+
+--echo #
+--echo # End of 10.4 tests
+--echo #
+
+--echo #
+--echo # MDEV-27442 Wrong result upon query with DISTINCT and EXISTS subquery
+--echo #
+
+CREATE TABLE t1 (a int, b int, KEY b (b,a)) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (0,100),(2,100),(2,101),(3,102);
+--echo # Must not use Using index for group-by
+explain SELECT DISTINCT b FROM t1 WHERE EXISTS ( SELECT 1 FROM DUAL WHERE a > 1 );
+SELECT DISTINCT b FROM t1 WHERE EXISTS ( SELECT 1 FROM DUAL WHERE a > 1 );
+DROP TABLE t1;
+
+--echo #
+--echo # MDEV-26585 Wrong query results when `using index for group-by`
+--echo #
+
+CREATE TABLE `t1` (
+  `id` int(11) NOT NULL AUTO_INCREMENT,
+  `owner_id` int(11) DEFAULT NULL,
+  `foo` tinyint(1) DEFAULT 0,
+  `whatever` varchar(255) DEFAULT NULL,
+  PRIMARY KEY (`id`),
+  KEY `index_t1_on_owner_id_and_foo` (`owner_id`,`foo`)
+) engine=InnoDB DEFAULT CHARSET=utf8;
+
+INSERT INTO t1 (owner_id, foo, whatever)
+VALUES (1, TRUE, "yello"), (1, FALSE, "yello"), (2, TRUE, "yello"),
+       (2, TRUE, "yello"), (2, FALSE, "yello");
+--replace_column 9 #
+EXPLAIN 
+SELECT DISTINCT owner_id FROM t1 WHERE foo = true GROUP BY owner_id HAVING (COUNT(*) = 1);
+SELECT DISTINCT owner_id FROM t1 WHERE foo = true GROUP BY owner_id HAVING (COUNT(*) = 1);
+DROP TABLE t1;
+
+--echo #
+--echo # MDEV-30240 Wrong result upon aggregate function with SQL_BUFFER_RESULT
+--echo #
+
+drop table if exists t1,t2;
+CREATE TABLE t1 (pk INT PRIMARY KEY);
+INSERT INTO t1 VALUES (1),(2);
+CREATE TABLE t2 (a INT);
+INSERT INTO t2 VALUES (1),(2);
+SELECT SQL_BUFFER_RESULT MIN(pk) FROM t1, t2;
+SELECT MIN(pk) FROM t1, t2;
+DROP TABLE t1, t2;
+
+--echo #
+--echo # MDEV-30605 Wrong result while using index for group-by
+--echo #
+
+CREATE TABLE t1 (pk INT primary key, a int, key(a)) engine=innodb;
+INSERT INTO t1 VALUES (1,-1),(2,8),(3,5),(4,-1),(5,10), (6,-1);
+
+SELECT MIN(pk), a FROM t1 WHERE pk <> 1 GROUP BY a;
+
+DROP TABLE t1;
+
+--echo #
+--echo # MDEV-6768 Wrong result with agregate with join with no resultset
+--echo #
+
+create table t1
+(
+	PARENT_ID int(10) unsigned NOT NULL AUTO_INCREMENT,
+	PARENT_FIELD VARCHAR(10),
+	PRIMARY KEY (PARENT_ID)
+) engine=innodb;
+
+create table t2
+(
+	CHILD_ID INT NOT NULL AUTO_INCREMENT,
+	PARENT_ID INT NOT NULL,
+	CHILD_FIELD varchar(10),
+	PRIMARY KEY (CHILD_ID)
+)engine=innodb;
+
+INSERT INTO t1 (PARENT_FIELD)
+SELECT 'AAAA';
+
+INSERT INTO t2 (PARENT_ID, CHILD_FIELD)
+SELECT 1, 'BBBB';
+
+explain select
+ t1.PARENT_ID,
+ min(CHILD_FIELD)
+ from t1 straight_join t2
+ where t1.PARENT_ID = 1
+ and t1.PARENT_ID = t2.PARENT_ID
+ and t2.CHILD_FIELD = "ZZZZ";
+
+select
+ t1.PARENT_ID,
+ min(CHILD_FIELD)
+ from t1 straight_join t2
+ where t1.PARENT_ID = 1
+ and t1.PARENT_ID = t2.PARENT_ID
+ and t2.CHILD_FIELD = "ZZZZ";
+
+select
+ 1,
+ min(CHILD_FIELD)
+ from t1 straight_join t2
+ where t1.PARENT_ID = 1
+ and t1.PARENT_ID = t2.PARENT_ID
+ and t2.CHILD_FIELD = "ZZZZ";
+
+select
+ IFNULL(t1.PARENT_ID,1),
+ min(CHILD_FIELD)
+ from t1 straight_join t2
+ where t1.PARENT_ID = 1
+ and t1.PARENT_ID = t2.PARENT_ID
+ and t2.CHILD_FIELD = "ZZZZ";
+
+
+--echo # Check that things works with MyISAM (which has different explain)
+
+alter table t1 engine=myisam;
+alter table t2 engine=myisam;
+
+explain select
+ t1.PARENT_ID,
+ min(CHILD_FIELD)
+ from t1 straight_join t2
+ where t1.PARENT_ID = 1
+ and t1.PARENT_ID = t2.PARENT_ID
+ and t2.CHILD_FIELD = "ZZZZ";
+
+select
+ t1.PARENT_ID,
+ min(CHILD_FIELD)
+ from t1 straight_join t2
+ where t1.PARENT_ID = 1
+ and t1.PARENT_ID = t2.PARENT_ID
+ and t2.CHILD_FIELD = "ZZZZ";
+
+drop table t1,t2;
+
+--echo # Check that things works if sub queries are re-executed
+
+create table t1 (a int primary key, b int);
+create table t2 (a int primary key, b int);
+create table t3 (a int primary key, b int);
+
+insert into t1 values (1,1),(2,2),(3,3);
+insert into t2 values (1,1),(2,2),(3,3);
+insert into t3 values (1,1),(3,3);
+
+explain
+select *,
+   (select
+        CONCAT('t2:',       IFNULL(t2.a,      't2a-null'), ';',
+               'min_t3_b:', IFNULL(min(t3.b), 't3b-null'))
+    from t2,t3
+    where t2.a=1 and t1.b = t3.a) as s1
+from t1;
+
+select *,
+   (select
+        CONCAT('t2:',       IFNULL(t2.a,      't2a-null'), ';',
+               'min_t3_b:', IFNULL(min(t3.b), 't3b-null'))
+    from t2,t3
+    where t2.a=1 and t1.b = t3.a) as s1
+from t1;
+
+drop table t1,t2,t3;
+
+--echo #
+--echo # End of 10.5 tests
+--echo #
+
+--echo #
+--echo # MDEV-24353: Adding GROUP BY slows down a query
+--echo #
+
+CREATE TABLE t1 (p int NOT NULL, a int NOT NULL, PRIMARY KEY (p,a));
+insert into t1 select 2,seq from seq_0_to_1000;
+
+EXPLAIN select MIN(a) from t1 where p = 2 group by p;
+SELECT MIN(a) from t1 where p = 2 group by p;
+EXPLAIN select MIN(a) from t1 group by p;
+SELECT MIN(a) from t1 where p = 2;
+drop table t1;
+
+--echo #
+--echo # End of 10.6 tests
+--echo #