mariadb/mysql-test/t/index_merge_ror.test

#
#  ROR-index_merge tests. 
#
--disable_warnings
drop table if exists  t0,t1,t2;
--enable_warnings
--disable_query_log
create table t1
(
  /* Field names reflect value(rowid) distribution, st=STairs, swt= SaWTooth */
  st_a int not null default 0,
  swt1a int not null default 0,
  swt2a int not null default 0,

  st_b int not null default 0,
  swt1b int not null default 0,
  swt2b int not null default 0,

  /* fields/keys for row retrieval tests */
  key1 int,
  key2 int,
  key3 int,
  key4 int,

  /* make rows much bigger then keys */
  filler1 char (200),
  filler2 char (200),
  filler3 char (200),
  filler4 char (200),
  filler5 char (200),
  filler6 char (200),
  
  /* order of keys is important */
  key sta_swt12a(st_a,swt1a,swt2a),
  key sta_swt1a(st_a,swt1a),
  key sta_swt2a(st_a,swt2a),
  key sta_swt21a(st_a,swt2a,swt1a),

  key st_a(st_a),
  key stb_swt1a_2b(st_b,swt1b,swt2a),
  key stb_swt1b(st_b,swt1b),
  key st_b(st_b),

  key(key1),
  key(key2),
  key(key3),
  key(key4)
) ;

# Fill table 
create table t0 as select * from t1;
let $cnt=1000;
while ($cnt)
{
  eval insert into t0 values (1, 2, 3, 1, 2, 3, 0, 0, 0, 0, 'data1', 'data2', 'data3', 'data4', 'data5', 'data6');
  dec $cnt;
}

alter table t1 disable keys;
let $1=4;
while ($1)
{
  let $2=4;
  while ($2) 
  {
    let $3=4;
    while ($3)
    {
      eval insert into t1 select $1, $2, $3, $1 ,$2, $3, key1, key2, key3, key4, filler1, filler2, filler3, filler4, filler5, filler6 from t0;
      dec $3;
    }
    dec $2;
  }
 dec $1;
}

# Row retrieval tests
# -1 is used for values 'out of any range we are using'
# insert enough rows for index intersection to be used for (key1,key2)
insert into t1 (key1, key2, key3, key4, filler1) values (100, 100, 100, 100,'key1-key2-key3-key4');
let $cnt=400;
while ($cnt)
{
  eval insert into t1 (key1, key2, key3, key4, filler1) values (100, -1, 100, -1,'key1-key3');
  dec $cnt;
}
let $cnt=400;
while ($cnt)
{
  eval insert into t1 (key1, key2, key3, key4, filler1) values (-1, 100, -1, 100,'key2-key4');
  dec $cnt;
}
alter table t1 enable keys;
--enable_query_log
select count(*) from t1;

# One row results tests for cases where a single row matches all conditions 
explain select key1,key2 from t1 where key1=100 and key2=100;
select key1,key2 from t1 where key1=100 and key2=100;

explain select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=100 and key4=100;
select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=100 and key4=100;

# Several-rows results 
insert into t1 (key1, key2, key3, key4, filler1) values (100, 100, -1, -1, 'key1-key2');
insert into t1 (key1, key2, key3, key4, filler1) values (-1, -1, 100, 100, 'key4-key3');

#  ROR-intersection, not covering
explain select key1,key2,filler1 from t1 where key1=100 and key2=100;
select key1,key2,filler1 from t1 where key1=100 and key2=100;

#  ROR-intersection, covering
explain select key1,key2 from t1 where key1=100 and key2=100;
select key1,key2 from t1 where key1=100 and key2=100;

#  ROR-union of ROR-intersections
explain select key1,key2,key3,key4 from t1 where key1=100 and key2=100 or key3=100 and key4=100;
select key1,key2,key3,key4 from t1 where key1=100 and key2=100 or key3=100 and key4=100;
explain select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=100 and key4=100;
select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=100 and key4=100;

#  3-way ROR-intersection
explain select key1,key2,key3 from t1 where key1=100 and key2=100 and key3=100;
select key1,key2,key3 from t1 where key1=100 and key2=100 and key3=100;

#  ROR-union(ROR-intersection, ROR-range)
insert into t1 (key1,key2,key3,key4,filler1) values (101,101,101,101, 'key1234-101');
explain select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=101;
select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=101;

# Run some ROR updates/deletes
select key1,key2, filler1 from t1 where key1=100 and key2=100;
update t1 set filler1='to be deleted' where key1=100 and key2=100;
update t1 set key1=200,key2=200 where key1=100 and key2=100;
delete from t1 where key1=200 and key2=200;
select key1,key2,filler1 from t1 where key2=100 and key2=200;

# ROR-union(ROR-intersection) with one of ROR-intersection giving empty
# results
explain select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=100 and key4=100;
select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=100 and key4=100;

delete from t1 where key3=100 and key4=100;

# ROR-union with all ROR-intersections giving empty results
explain select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=100 and key4=100;
select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=100 and key4=100;

# ROR-intersection with empty result
explain select key1,key2 from t1 where key1=100 and key2=100;
select key1,key2 from t1 where key1=100 and key2=100;

# ROR-union tests with various cases.
#  All scans returning duplicate rows: 
insert into t1 (key1, key2, key3, key4, filler1) values (100, 100, 200, 200,'key1-key2-key3-key4-1');
insert into t1 (key1, key2, key3, key4, filler1) values (100, 100, 200, 200,'key1-key2-key3-key4-2');
insert into t1 (key1, key2, key3, key4, filler1) values (100, 100, 200, 200,'key1-key2-key3-key4-3');

explain select key1,key2,key3,key4,filler1 from t1 where key3=200 or (key1=100 and key2=100) or key4=200;
select key1,key2,key3,key4,filler1 from t1 where key3=200 or (key1=100 and key2=100) or key4=200;

insert into t1 (key1, key2, key3, key4, filler1) values (-1, -1, -1, 200,'key4');

explain select key1,key2,key3,key4,filler1 from t1 where key3=200 or (key1=100 and key2=100) or key4=200;
select key1,key2,key3,key4,filler1 from t1 where key3=200 or (key1=100 and key2=100) or key4=200;

insert into t1 (key1, key2, key3, key4, filler1) values (-1, -1, 200, -1,'key3');

explain select key1,key2,key3,key4,filler1 from t1 where key3=200 or (key1=100 and key2=100) or key4=200;
select key1,key2,key3,key4,filler1 from t1 where key3=200 or (key1=100 and key2=100) or key4=200;

##
## Optimizer tests 
##

# Check that the shortest key is used for ROR-intersection, covering and non-covering.
explain select * from t1 where st_a=1 and st_b=1;
explain select st_a,st_b from t1 where st_a=1 and st_b=1;

# Check if "ingore index" syntax works
explain select st_a from t1 ignore index (st_a) where st_a=1 and st_b=1;

# Do many tests 
# Check that keys that don't improve selectivity are skipped.
# 

explain select * from t1 where st_a=1 and swt1a=1 and swt2a=1;

explain select * from t1 where st_b=1 and swt1b=1 and swt2b=1;

explain select * from t1 where st_a=1 and swt1a=1 and swt2a=1 and st_b=1 and swt1b=1 and swt2b=1;

explain select * from t1 ignore index (sta_swt21a, stb_swt1a_2b) 
  where st_a=1 and swt1a=1 and swt2a=1 and st_b=1 and swt1b=1 and swt2b=1;

explain select * from t1 ignore index (sta_swt21a, sta_swt12a, stb_swt1a_2b) 
  where st_a=1 and swt1a=1 and swt2a=1 and st_b=1 and swt1b=1 and swt2b=1;

explain select * from t1 ignore index (sta_swt21a, sta_swt12a, stb_swt1a_2b, stb_swt1b) 
  where st_a=1 and swt1a=1 and swt2a=1 and st_b=1 and swt1b=1 and swt2b=1;

explain select * from t1 
  where st_a=1 and swt1a=1 and swt2a=1 and st_b=1 and swt1b=1;

explain select * from t1 
  where st_a=1 and swt1a=1 and st_b=1 and swt1b=1 and swt1b=1;

explain select st_a from t1 
  where st_a=1 and swt1a=1 and st_b=1 and swt1b=1 and swt1b=1;

explain select st_a from t1 
  where st_a=1 and swt1a=1 and st_b=1 and swt1b=1 and swt1b=1;

drop table t0,t1;

# 'Partially' covered fields test

create table t2 (
  a char(10),
  b char(10),
  filler1 char(255),
  filler2 char(255),
  key(a(5)),
  key(b(5))
);

--disable_query_log
let $1=8;
while ($1)
{
  eval insert into t2 values (repeat(char($1+64), 8),repeat(char($1+64), 8),'filler1', 'filler2');
  dec $1;
}
insert into t2 select * from t2;
insert into t2 select * from t2;
--enable_query_log

# The table row buffer is reused. Fill it with rows that don't match.
select count(a) from t2 where a='BBBBBBBB';
select count(a) from t2 where b='BBBBBBBB';

# BUG#1: 
--replace_result a a_or_b b a_or_b
explain select count(a) from t2 where a='AAAAAAAA' and b='AAAAAAAA';
select count(a) from t2 where a='AAAAAAAA' and b='AAAAAAAA';
select count(a) from t2 ignore index(a,b) where a='AAAAAAAA' and b='AAAAAAAA';

insert into t2 values ('ab', 'ab', 'uh', 'oh');
explain select a from t2 where a='ab';
drop table t2;