mariadb/mysql-test/main/opt_trace_index_merge.test

--source include/not_embedded.inc
set @tmp_opt_switch= @@optimizer_switch;
set optimizer_switch='index_merge_sort_intersection=on';
set optimizer_trace='enabled=on';
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (a int, b int, c int, filler char(100),
                 key(a), key(b), key(c));
insert into t1 select
  A.a * B.a*10 + C.a*100,
  A.a * B.a*10 + C.a*100,
  A.a,
  'filler'
from t0 A, t0 B, t0 C;

--echo This should use union:
explain select * from t1 where a=1 or b=1;
--disable_view_protocol
select * from information_schema.OPTIMIZER_TRACE;
--enable_view_protocol
drop table t0,t1;
set optimizer_trace="enabled=off";
set @@optimizer_switch= @tmp_opt_switch;

--echo # More tests added index_merge access

--enable_warnings
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;
--disable_query_log
--echo # Printing of many insert into t0 values (....) disabled.
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;
}
--enable_query_log

alter table t1 disable keys;
--disable_query_log
--echo # Printing of many insert into t1 select .... from t0 disabled.
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;
}

--echo # Printing of many insert into t1 (...) values (....) disabled.
# 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;
}
--enable_query_log
alter table t1 enable keys;

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');
set optimizer_trace='enabled=on';

# Enable after fix MDEV-31408
--disable_view_protocol
--echo #  3-way ROR-intersection
explain select key1,key2,key3 from t1 where key1=100 and key2=100 and key3=100;
select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
select JSON_DETAILED(JSON_EXTRACT(trace, '$**.chosen_range_access_summary')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;

--echo # ROR-union(ROR-intersection, ROR-range)
explain select key1,key2,key3,key4 from t1 where key1=100 and key2=100 or key3=100 and key4=100;
select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
select JSON_DETAILED(JSON_EXTRACT(trace, '$**.chosen_range_access_summary')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
--enable_view_protocol

drop table t0,t1;
set optimizer_trace="enabled=off";