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MDEV-30806: ANALYZE FORMAT=JSON: better support for BNL and BNL-H joins

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In block-nl-join, add:

- r_loops - this shows how many incoming record combinations this
  query plan node had.

- r_effective_rows - this shows the average number of matching rows
  that this table had for each incoming record combination. This is
  comparable with r_rows in non-blocked access methods.
  For BNL-joins, it is always equal to
   $.table.r_rows * $.table.r_filtered
  For BNL-H joins the value cannot be computed from other values

Reviewed by: Monty <monty@mariadb.org>
This commit is contained in:
Sergei Petrunia
2023-03-07 19:49:57 +03:00
parent 169def14f6
commit dc1d6213f9
14 changed files with 279 additions and 30 deletions
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42
mysql-test/main/analyze_format_json.test
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@ -226,3 +226,45 @@ create table t2 as select * from t1;
--source include/analyze-format.inc
analyze format=json select a, (select t2.b from t2 where t2.a<t1.a order by t2.c limit 1) from t1 where t1.a<0;
drop table t0,t1,t2;
--echo #
--echo # MDEV-30806: ANALYZE FORMAT=JSON: better support for BNL and BNL-H joins
--echo #
--source include/have_sequence.inc
create table t10 (
a int,
b int
);
insert into t10 select seq, seq/3 from seq_0_to_999;
create table t11 (
a int,
b int
);
insert into t11 select seq, seq/5 from seq_0_to_999;
analyze table t10,t11 persistent for all;
--source include/analyze-format.inc
analyze format=json
select * from t10, t11
where
t10.a < 700 and
t11.a < 100
and t10.b=t11.b;
set @tmp=@@join_cache_level, join_cache_level=6;
--source include/analyze-format.inc
analyze format=json
select * from t10, t11
where
t10.a < 700 and
t11.a < 100
and t10.b=t11.b;
set join_cache_level=@tmp;
drop table t10, t11;