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Commit aae3233c authored by Oleg Smirnov's avatar Oleg Smirnov
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MDEV-34041 Display additional information for materialized subqueries in... 

MDEV-34041 Display additional information for materialized subqueries in EXPLAIN/ANALYZE FORMAT=JSON

This commits adds the "materialization" block to the output of
EXPLAIN/ANALYZE FORMAT=JSON when materialized subqueries are involved
into processing. In the case of ANALYZE additional runtime information
is displayed, such as:
  - chosen strategy of materialization
  - number of partial match/index lookup loops
  - sizes of partial match buffers
parent a5e4c349
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mysql-test/include/analyze-format.inc
View file @ aae3233c
# The time on ANALYSE FORMAT=JSON is rather variable # The time on ANALYSE FORMAT=JSON is rather variable
--replace_regex /("(r_[a-z_]*_time_ms|r_buffer_size)": )[^, \n]*/\1"REPLACED"/ --replace_regex /("(r_[a-z_]*_time_ms|r_buffer_size|r_partial_match_buffer_size)": )[^, \n]*/\1"REPLACED"/
mysql-test/main/analyze_format_json.result
View file @ aae3233c
...@@ -659,6 +659,9 @@ ANALYZE ...@@ -659,6 +659,9 @@ ANALYZE
}, },
"subqueries": [ "subqueries": [
{ {
"materialization": {
"r_strategy": "index_lookup",
"r_loops": 2,
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"r_loops": 1, "r_loops": 1,
...@@ -676,6 +679,7 @@ ANALYZE ...@@ -676,6 +679,7 @@ ANALYZE
} }
} }
} }
}
] ]
} }
} }
......
mysql-test/main/derived_cond_pushdown.result
View file @ aae3233c
...@@ -7671,6 +7671,7 @@ EXPLAIN ...@@ -7671,6 +7671,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"table": { "table": {
...@@ -7678,6 +7679,7 @@ EXPLAIN ...@@ -7678,6 +7679,7 @@ EXPLAIN
} }
} }
} }
}
}, },
"read_sorted_file": { "read_sorted_file": {
"filesort": { "filesort": {
...@@ -7731,6 +7733,7 @@ EXPLAIN ...@@ -7731,6 +7733,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"table": { "table": {
...@@ -7738,6 +7741,7 @@ EXPLAIN ...@@ -7738,6 +7741,7 @@ EXPLAIN
} }
} }
} }
}
}, },
"table": { "table": {
"table_name": "<derived3>", "table_name": "<derived3>",
...@@ -7815,6 +7819,7 @@ EXPLAIN ...@@ -7815,6 +7819,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 3, "select_id": 3,
"table": { "table": {
...@@ -7822,6 +7827,7 @@ EXPLAIN ...@@ -7822,6 +7827,7 @@ EXPLAIN
} }
} }
} }
}
}, },
"table": { "table": {
"table_name": "<derived2>", "table_name": "<derived2>",
...@@ -7872,6 +7878,7 @@ EXPLAIN ...@@ -7872,6 +7878,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 3, "select_id": 3,
"table": { "table": {
...@@ -7879,6 +7886,7 @@ EXPLAIN ...@@ -7879,6 +7886,7 @@ EXPLAIN
} }
} }
} }
}
}, },
"table": { "table": {
"table_name": "<derived2>", "table_name": "<derived2>",
...@@ -7924,6 +7932,7 @@ EXPLAIN ...@@ -7924,6 +7932,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 3, "select_id": 3,
"table": { "table": {
...@@ -7931,6 +7940,7 @@ EXPLAIN ...@@ -7931,6 +7940,7 @@ EXPLAIN
} }
} }
} }
}
}, },
"table": { "table": {
"table_name": "<derived2>", "table_name": "<derived2>",
...@@ -7976,6 +7986,7 @@ EXPLAIN ...@@ -7976,6 +7986,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 3, "select_id": 3,
"table": { "table": {
...@@ -7983,6 +7994,7 @@ EXPLAIN ...@@ -7983,6 +7994,7 @@ EXPLAIN
} }
} }
} }
}
}, },
"table": { "table": {
"table_name": "<derived2>", "table_name": "<derived2>",
...@@ -8030,6 +8042,7 @@ EXPLAIN ...@@ -8030,6 +8042,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 3, "select_id": 3,
"table": { "table": {
...@@ -8037,6 +8050,7 @@ EXPLAIN ...@@ -8037,6 +8050,7 @@ EXPLAIN
} }
} }
} }
}
}, },
"table": { "table": {
"table_name": "<derived2>", "table_name": "<derived2>",
...@@ -8082,6 +8096,7 @@ EXPLAIN ...@@ -8082,6 +8096,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 3, "select_id": 3,
"table": { "table": {
...@@ -8089,6 +8104,7 @@ EXPLAIN ...@@ -8089,6 +8104,7 @@ EXPLAIN
} }
} }
} }
}
}, },
"table": { "table": {
"table_name": "<derived2>", "table_name": "<derived2>",
...@@ -8134,6 +8150,7 @@ EXPLAIN ...@@ -8134,6 +8150,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 3, "select_id": 3,
"table": { "table": {
...@@ -8141,6 +8158,7 @@ EXPLAIN ...@@ -8141,6 +8158,7 @@ EXPLAIN
} }
} }
} }
}
}, },
"table": { "table": {
"table_name": "<derived2>", "table_name": "<derived2>",
...@@ -8223,6 +8241,7 @@ EXPLAIN ...@@ -8223,6 +8241,7 @@ EXPLAIN
}, },
"subqueries": [ "subqueries": [
{ {
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"table": { "table": {
...@@ -8230,6 +8249,7 @@ EXPLAIN ...@@ -8230,6 +8249,7 @@ EXPLAIN
} }
} }
} }
}
] ]
} }
} }
...@@ -9294,6 +9314,7 @@ EXPLAIN ...@@ -9294,6 +9314,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"temporary_table": { "temporary_table": {
...@@ -9326,6 +9347,7 @@ EXPLAIN ...@@ -9326,6 +9347,7 @@ EXPLAIN
} }
} }
} }
}
} }
SELECT * FROM t1 SELECT * FROM t1
WHERE (t1.a,t1.b) IN WHERE (t1.a,t1.b) IN
...@@ -9396,6 +9418,7 @@ EXPLAIN ...@@ -9396,6 +9418,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"temporary_table": { "temporary_table": {
...@@ -9428,6 +9451,7 @@ EXPLAIN ...@@ -9428,6 +9451,7 @@ EXPLAIN
} }
} }
} }
}
} }
DROP TABLE t1,t2; DROP TABLE t1,t2;
# #
...@@ -10826,6 +10850,7 @@ EXPLAIN ...@@ -10826,6 +10850,7 @@ EXPLAIN
"attached_condition": "t4.c = `<subquery2>`.`sum(b)`", "attached_condition": "t4.c = `<subquery2>`.`sum(b)`",
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"having_condition": "`f1(a)` > 1 and `sum(b)` > 123", "having_condition": "`f1(a)` > 1 and `sum(b)` > 123",
...@@ -10842,6 +10867,7 @@ EXPLAIN ...@@ -10842,6 +10867,7 @@ EXPLAIN
} }
} }
} }
}
} }
drop view v2; drop view v2;
drop function f1; drop function f1;
......
mysql-test/main/explain_json.result
View file @ aae3233c
...@@ -574,6 +574,7 @@ EXPLAIN ...@@ -574,6 +574,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"temporary_table": { "temporary_table": {
...@@ -588,6 +589,7 @@ EXPLAIN ...@@ -588,6 +589,7 @@ EXPLAIN
} }
} }
} }
}
} }
# #
# Semi-join Materialization # Semi-join Materialization
...@@ -906,6 +908,7 @@ EXPLAIN ...@@ -906,6 +908,7 @@ EXPLAIN
}, },
"subqueries": [ "subqueries": [
{ {
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"table": { "table": {
...@@ -916,6 +919,7 @@ EXPLAIN ...@@ -916,6 +919,7 @@ EXPLAIN
} }
} }
} }
}
] ]
} }
} }
......
mysql-test/main/having_cond_pushdown.result
View file @ aae3233c
...@@ -1134,6 +1134,7 @@ EXPLAIN ...@@ -1134,6 +1134,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"temporary_table": { "temporary_table": {
...@@ -1151,6 +1152,7 @@ EXPLAIN ...@@ -1151,6 +1152,7 @@ EXPLAIN
} }
} }
} }
}
} }
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT * FROM t1 set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT * FROM t1
WHERE WHERE
...@@ -1183,6 +1185,7 @@ EXPLAIN ...@@ -1183,6 +1185,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 3, "select_id": 3,
"temporary_table": { "temporary_table": {
...@@ -1200,6 +1203,7 @@ EXPLAIN ...@@ -1200,6 +1203,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula : pushdown into materialized IN subquery # conjunctive subformula : pushdown into materialized IN subquery
# HAVING clause # HAVING clause
...@@ -1257,6 +1261,7 @@ EXPLAIN ...@@ -1257,6 +1261,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"having_condition": "`MAX(t2.y)` < 14", "having_condition": "`MAX(t2.y)` < 14",
...@@ -1275,6 +1280,7 @@ EXPLAIN ...@@ -1275,6 +1280,7 @@ EXPLAIN
} }
} }
} }
}
} }
set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT * FROM t1 set statement optimizer_switch='condition_pushdown_from_having=off' for explain format=json SELECT * FROM t1
WHERE WHERE
...@@ -1307,6 +1313,7 @@ EXPLAIN ...@@ -1307,6 +1313,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 3, "select_id": 3,
"having_condition": "`MAX(t2.y)` < 14", "having_condition": "`MAX(t2.y)` < 14",
...@@ -1325,6 +1332,7 @@ EXPLAIN ...@@ -1325,6 +1332,7 @@ EXPLAIN
} }
} }
} }
}
} }
# non-standard allowed queries # non-standard allowed queries
# conjunctive subformula # conjunctive subformula
......
mysql-test/main/in_subq_cond_pushdown.result
View file @ aae3233c
...@@ -70,6 +70,7 @@ EXPLAIN ...@@ -70,6 +70,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"having_condition": "`MAX(t2.g)` < 25", "having_condition": "`MAX(t2.g)` < 25",
...@@ -86,6 +87,7 @@ EXPLAIN ...@@ -86,6 +87,7 @@ EXPLAIN
} }
} }
} }
}
} }
# extracted AND formula : pushing into HAVING # extracted AND formula : pushing into HAVING
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
...@@ -159,6 +161,7 @@ EXPLAIN ...@@ -159,6 +161,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"having_condition": "`MAX(t2.g)` > 55 and t2.f < 4", "having_condition": "`MAX(t2.g)` > 55 and t2.f < 4",
...@@ -175,6 +178,7 @@ EXPLAIN ...@@ -175,6 +178,7 @@ EXPLAIN
} }
} }
} }
}
} }
# extracted OR formula : pushing into HAVING # extracted OR formula : pushing into HAVING
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
...@@ -250,6 +254,7 @@ EXPLAIN ...@@ -250,6 +254,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"having_condition": "`MAX(t2.g)` > 60 or `MAX(t2.g)` < 25", "having_condition": "`MAX(t2.g)` > 60 or `MAX(t2.g)` < 25",
...@@ -266,6 +271,7 @@ EXPLAIN ...@@ -266,6 +271,7 @@ EXPLAIN
} }
} }
} }
}
} }
# extracted AND-OR formula : pushing into HAVING # extracted AND-OR formula : pushing into HAVING
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
...@@ -339,6 +345,7 @@ EXPLAIN ...@@ -339,6 +345,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"having_condition": "(`MAX(t2.g)` > 60 or `MAX(t2.g)` < 25) and t2.f > 2", "having_condition": "(`MAX(t2.g)` > 60 or `MAX(t2.g)` < 25) and t2.f > 2",
...@@ -355,6 +362,7 @@ EXPLAIN ...@@ -355,6 +362,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula : pushing into HAVING # conjunctive subformula : pushing into HAVING
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
...@@ -430,6 +438,7 @@ EXPLAIN ...@@ -430,6 +438,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"having_condition": "t2.f > 1", "having_condition": "t2.f > 1",
...@@ -446,6 +455,7 @@ EXPLAIN ...@@ -446,6 +455,7 @@ EXPLAIN
} }
} }
} }
}
} }
# using view IN subquery defINition : pushing into HAVING # using view IN subquery defINition : pushing into HAVING
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
...@@ -519,6 +529,7 @@ EXPLAIN ...@@ -519,6 +529,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"having_condition": "`MAX(v1_y)` > 20", "having_condition": "`MAX(v1_y)` > 20",
...@@ -535,6 +546,7 @@ EXPLAIN ...@@ -535,6 +546,7 @@ EXPLAIN
} }
} }
} }
}
} }
# using equality : pushing into WHERE # using equality : pushing into WHERE
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1,v1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1,v1
...@@ -621,6 +633,7 @@ EXPLAIN ...@@ -621,6 +633,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"having_condition": "`MAX(t2.g)` > 20", "having_condition": "`MAX(t2.g)` > 20",
...@@ -637,6 +650,7 @@ EXPLAIN ...@@ -637,6 +650,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula : pushing into WHERE # conjunctive subformula : pushing into WHERE
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
...@@ -712,6 +726,7 @@ EXPLAIN ...@@ -712,6 +726,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"temporary_table": { "temporary_table": {
...@@ -727,6 +742,7 @@ EXPLAIN ...@@ -727,6 +742,7 @@ EXPLAIN
} }
} }
} }
}
} }
# extracted AND formula : pushing into WHERE # extracted AND formula : pushing into WHERE
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
...@@ -802,6 +818,7 @@ EXPLAIN ...@@ -802,6 +818,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"temporary_table": { "temporary_table": {
...@@ -817,6 +834,7 @@ EXPLAIN ...@@ -817,6 +834,7 @@ EXPLAIN
} }
} }
} }
}
} }
# extracted OR formula : pushing into WHERE # extracted OR formula : pushing into WHERE
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
...@@ -894,6 +912,7 @@ EXPLAIN ...@@ -894,6 +912,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"temporary_table": { "temporary_table": {
...@@ -909,6 +928,7 @@ EXPLAIN ...@@ -909,6 +928,7 @@ EXPLAIN
} }
} }
} }
}
} }
# extracted AND-OR formula : pushing into WHERE # extracted AND-OR formula : pushing into WHERE
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
...@@ -982,6 +1002,7 @@ EXPLAIN ...@@ -982,6 +1002,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"temporary_table": { "temporary_table": {
...@@ -997,6 +1018,7 @@ EXPLAIN ...@@ -997,6 +1018,7 @@ EXPLAIN
} }
} }
} }
}
} }
# extracted AND-OR formula : pushing into WHERE # extracted AND-OR formula : pushing into WHERE
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
...@@ -1070,6 +1092,7 @@ EXPLAIN ...@@ -1070,6 +1092,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"temporary_table": { "temporary_table": {
...@@ -1085,6 +1108,7 @@ EXPLAIN ...@@ -1085,6 +1108,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula : pushing into WHERE # conjunctive subformula : pushing into WHERE
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
...@@ -1158,6 +1182,7 @@ EXPLAIN ...@@ -1158,6 +1182,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"temporary_table": { "temporary_table": {
...@@ -1173,6 +1198,7 @@ EXPLAIN ...@@ -1173,6 +1198,7 @@ EXPLAIN
} }
} }
} }
}
} }
# using equalities : pushing into WHERE # using equalities : pushing into WHERE
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
...@@ -1246,6 +1272,7 @@ EXPLAIN ...@@ -1246,6 +1272,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"table": { "table": {
...@@ -1259,6 +1286,7 @@ EXPLAIN ...@@ -1259,6 +1286,7 @@ EXPLAIN
} }
} }
} }
}
} }
# using equality : pushing into WHERE # using equality : pushing into WHERE
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
...@@ -1332,6 +1360,7 @@ EXPLAIN ...@@ -1332,6 +1360,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"temporary_table": { "temporary_table": {
...@@ -1347,6 +1376,7 @@ EXPLAIN ...@@ -1347,6 +1376,7 @@ EXPLAIN
} }
} }
} }
}
} }
# using view IN subquery definition : pushing into WHERE # using view IN subquery definition : pushing into WHERE
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
...@@ -1418,6 +1448,7 @@ EXPLAIN ...@@ -1418,6 +1448,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"temporary_table": { "temporary_table": {
...@@ -1433,6 +1464,7 @@ EXPLAIN ...@@ -1433,6 +1464,7 @@ EXPLAIN
} }
} }
} }
}
} }
# using equality : pushing into WHERE # using equality : pushing into WHERE
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1,v1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1,v1
...@@ -1521,6 +1553,7 @@ EXPLAIN ...@@ -1521,6 +1553,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"temporary_table": { "temporary_table": {
...@@ -1536,6 +1569,7 @@ EXPLAIN ...@@ -1536,6 +1569,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula : pushing into WHERE # conjunctive subformula : pushing into WHERE
# extracted OR formula : pushing into HAVING # extracted OR formula : pushing into HAVING
...@@ -1610,6 +1644,7 @@ EXPLAIN ...@@ -1610,6 +1644,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"having_condition": "t2.f < 3 or t2.f = 4", "having_condition": "t2.f < 3 or t2.f = 4",
...@@ -1626,6 +1661,7 @@ EXPLAIN ...@@ -1626,6 +1661,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula using addition : pushing into HAVING # conjunctive subformula using addition : pushing into HAVING
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
...@@ -1699,6 +1735,7 @@ EXPLAIN ...@@ -1699,6 +1735,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"having_condition": "t2.e + `MAX(t2.g)` > 41", "having_condition": "t2.e + `MAX(t2.g)` > 41",
...@@ -1715,6 +1752,7 @@ EXPLAIN ...@@ -1715,6 +1752,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula using substitution : pushing into HAVING # conjunctive subformula using substitution : pushing into HAVING
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
...@@ -1790,6 +1828,7 @@ EXPLAIN ...@@ -1790,6 +1828,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"having_condition": "`MAX(t2.g)` - t2.e < 35", "having_condition": "`MAX(t2.g)` - t2.e < 35",
...@@ -1806,6 +1845,7 @@ EXPLAIN ...@@ -1806,6 +1845,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula using multiplication : pushing into HAVING # conjunctive subformula using multiplication : pushing into HAVING
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
...@@ -1879,6 +1919,7 @@ EXPLAIN ...@@ -1879,6 +1919,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"having_condition": "`MAX(t2.g)` * t2.e > 100", "having_condition": "`MAX(t2.g)` * t2.e > 100",
...@@ -1895,6 +1936,7 @@ EXPLAIN ...@@ -1895,6 +1936,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula using division : pushing into HAVING # conjunctive subformula using division : pushing into HAVING
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
...@@ -1972,6 +2014,7 @@ EXPLAIN ...@@ -1972,6 +2014,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"having_condition": "`MAX(t2.g)` / t2.e > 30", "having_condition": "`MAX(t2.g)` / t2.e > 30",
...@@ -1988,6 +2031,7 @@ EXPLAIN ...@@ -1988,6 +2031,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula using BETWEEN : pushing into HAVING # conjunctive subformula using BETWEEN : pushing into HAVING
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
...@@ -2061,6 +2105,7 @@ EXPLAIN ...@@ -2061,6 +2105,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"having_condition": "`MAX(t2.g)` between 50 and 100", "having_condition": "`MAX(t2.g)` between 50 and 100",
...@@ -2077,6 +2122,7 @@ EXPLAIN ...@@ -2077,6 +2122,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula using addition : pushing into WHERE # conjunctive subformula using addition : pushing into WHERE
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
...@@ -2150,6 +2196,7 @@ EXPLAIN ...@@ -2150,6 +2196,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"temporary_table": { "temporary_table": {
...@@ -2165,6 +2212,7 @@ EXPLAIN ...@@ -2165,6 +2212,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula using substitution : pushing into WHERE # conjunctive subformula using substitution : pushing into WHERE
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
...@@ -2238,6 +2286,7 @@ EXPLAIN ...@@ -2238,6 +2286,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"temporary_table": { "temporary_table": {
...@@ -2253,6 +2302,7 @@ EXPLAIN ...@@ -2253,6 +2302,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula using multiplication : pushing into WHERE # conjunctive subformula using multiplication : pushing into WHERE
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
...@@ -2326,6 +2376,7 @@ EXPLAIN ...@@ -2326,6 +2376,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"temporary_table": { "temporary_table": {
...@@ -2341,6 +2392,7 @@ EXPLAIN ...@@ -2341,6 +2392,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula using division : pushing into WHERE # conjunctive subformula using division : pushing into WHERE
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
...@@ -2416,6 +2468,7 @@ EXPLAIN ...@@ -2416,6 +2468,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"temporary_table": { "temporary_table": {
...@@ -2431,6 +2484,7 @@ EXPLAIN ...@@ -2431,6 +2484,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula using BETWEEN : pushing into WHERE # conjunctive subformula using BETWEEN : pushing into WHERE
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1 SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR SELECT * FROM t1
...@@ -2510,6 +2564,7 @@ EXPLAIN ...@@ -2510,6 +2564,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"temporary_table": { "temporary_table": {
...@@ -2525,6 +2580,7 @@ EXPLAIN ...@@ -2525,6 +2580,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula : pushing into HAVING of the IN subquery # conjunctive subformula : pushing into HAVING of the IN subquery
# conjunctive subformula : pushing into WHERE of the view from the IN subquery # conjunctive subformula : pushing into WHERE of the view from the IN subquery
...@@ -2602,6 +2658,7 @@ EXPLAIN ...@@ -2602,6 +2658,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"having_condition": "v2.max_g > 3", "having_condition": "v2.max_g > 3",
...@@ -2636,6 +2693,7 @@ EXPLAIN ...@@ -2636,6 +2693,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula : pushing into WHERE of the IN subquery # conjunctive subformula : pushing into WHERE of the IN subquery
# conjunctive subformula : pushing into WHERE of the view # conjunctive subformula : pushing into WHERE of the view
...@@ -2712,6 +2770,7 @@ EXPLAIN ...@@ -2712,6 +2770,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"temporary_table": { "temporary_table": {
...@@ -2745,6 +2804,7 @@ EXPLAIN ...@@ -2745,6 +2804,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula : pushing into WHERE and HAVING # conjunctive subformula : pushing into WHERE and HAVING
# of the IN subquery # of the IN subquery
...@@ -2822,6 +2882,7 @@ EXPLAIN ...@@ -2822,6 +2882,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"having_condition": "v2.max_g < 100", "having_condition": "v2.max_g < 100",
...@@ -2856,6 +2917,7 @@ EXPLAIN ...@@ -2856,6 +2917,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula : pushing into WHERE of the IN subquery # conjunctive subformula : pushing into WHERE of the IN subquery
# extracted AND formula : pushing into HAVING of the derived table # extracted AND formula : pushing into HAVING of the derived table
...@@ -2956,6 +3018,7 @@ EXPLAIN ...@@ -2956,6 +3018,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"temporary_table": { "temporary_table": {
...@@ -2988,6 +3051,7 @@ EXPLAIN ...@@ -2988,6 +3051,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula : pushing into HAVING of the derived table # conjunctive subformula : pushing into HAVING of the derived table
# conjunctive subformula : pushing into WHERE of the IN subquery from # conjunctive subformula : pushing into WHERE of the IN subquery from
...@@ -3107,6 +3171,7 @@ EXPLAIN ...@@ -3107,6 +3171,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"temporary_table": { "temporary_table": {
...@@ -3139,6 +3204,7 @@ EXPLAIN ...@@ -3139,6 +3204,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula : pushing into WHERE of the derived table # conjunctive subformula : pushing into WHERE of the derived table
# extracted AND formula : pushing into WHERE of the IN subquery from # extracted AND formula : pushing into WHERE of the IN subquery from
...@@ -3259,6 +3325,7 @@ EXPLAIN ...@@ -3259,6 +3325,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"temporary_table": { "temporary_table": {
...@@ -3291,6 +3358,7 @@ EXPLAIN ...@@ -3291,6 +3358,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula : pushing into WHERE and HAVING # conjunctive subformula : pushing into WHERE and HAVING
# of the derived table # of the derived table
...@@ -3418,6 +3486,7 @@ EXPLAIN ...@@ -3418,6 +3486,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 3, "select_id": 3,
"having_condition": "t2.f < 5", "having_condition": "t2.f < 5",
...@@ -3439,6 +3508,7 @@ EXPLAIN ...@@ -3439,6 +3508,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula : pushing into WHERE of the derived table # conjunctive subformula : pushing into WHERE of the derived table
# conjunctive subformula : pushing into HAVING of the IN subquery from # conjunctive subformula : pushing into HAVING of the IN subquery from
...@@ -3587,6 +3657,7 @@ EXPLAIN ...@@ -3587,6 +3657,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 3, "select_id": 3,
"having_condition": "t2.f < 5", "having_condition": "t2.f < 5",
...@@ -3608,6 +3679,7 @@ EXPLAIN ...@@ -3608,6 +3679,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula : pushing into WHERE # conjunctive subformula : pushing into WHERE
# using WINDOW FUNCTIONS : using MAX function # using WINDOW FUNCTIONS : using MAX function
...@@ -3684,6 +3756,7 @@ EXPLAIN ...@@ -3684,6 +3756,7 @@ EXPLAIN
"filtered": 100, "filtered": 100,
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"window_functions_computation": { "window_functions_computation": {
...@@ -3706,6 +3779,7 @@ EXPLAIN ...@@ -3706,6 +3779,7 @@ EXPLAIN
} }
} }
} }
}
} }
# conjunctive subformula : pushing into WHERE # conjunctive subformula : pushing into WHERE
# using WINDOW FUNCTIONS : using SUM function # using WINDOW FUNCTIONS : using SUM function
...@@ -3777,6 +3851,7 @@ EXPLAIN ...@@ -3777,6 +3851,7 @@ EXPLAIN
"attached_condition": "t1.c = `<subquery2>`.`CAST(SUM(t2.g) OVER (PARTITION BY t2.f) AS INT)`", "attached_condition": "t1.c = `<subquery2>`.`CAST(SUM(t2.g) OVER (PARTITION BY t2.f) AS INT)`",
"materialized": { "materialized": {
"unique": 1, "unique": 1,
"materialization": {
"query_block": { "query_block": {
"select_id": 2, "select_id": 2,
"window_functions_computation": { "window_functions_computation": {
...@@ -3799,6 +3874,7 @@ EXPLAIN ...@@ -3799,6 +3874,7 @@ EXPLAIN
} }
} }
} }
}
} }
DROP TABLE t1,t2,t3; DROP TABLE t1,t2,t3;
DROP VIEW v1,v2; DROP VIEW v1,v2;
......
mysql-test/main/subselect_mat_analyze_json.result 0 → 100644
View file @ aae3233c
set @save_optimizer_switch=@@optimizer_switch;
create table t1 (a int);
create table t2 (b int);
insert into t1 values (null), (1), (2), (3);
insert into t2 values (3), (4);
set @@optimizer_switch = "materialization=on,in_to_exists=off,semijoin=off";
explain format=json select * from t1 where a in (select b from t2);
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "ALL",
"rows": 4,
"filtered": 100,
"attached_condition": "<in_optimizer>(t1.a,t1.a in (subquery#2))"
},
"subqueries": [
{
"materialization": {
"query_block": {
"select_id": 2,
"table": {
"table_name": "t2",
"access_type": "ALL",
"rows": 2,
"filtered": 100
}
}
}
}
]
}
}
# "Complete match" execution strategy
analyze format=json select * from t1 where a in (select b from t2);
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t1",
"access_type": "ALL",
"r_loops": 1,
"rows": 4,
"r_rows": 4,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 25,
"attached_condition": "<in_optimizer>(t1.a,t1.a in (subquery#2))"
},
"subqueries": [
{
"materialization": {
"r_strategy": "index_lookup",
"r_loops": 3,
"query_block": {
"select_id": 2,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t2",
"access_type": "ALL",
"r_loops": 1,
"rows": 2,
"r_rows": 2,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100
}
}
}
}
]
}
}
# "Partial match" is used due to NOT IN
# Force rowid-merge partial partial matching
set @@optimizer_switch="partial_match_rowid_merge=on,partial_match_table_scan=off";
analyze format=json select * from t1 where a not in (select b from t2);
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t1",
"access_type": "ALL",
"r_loops": 1,
"rows": 4,
"r_rows": 4,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 50,
"attached_condition": "!<in_optimizer>(t1.a,t1.a in (subquery#2))"
},
"subqueries": [
{
"materialization": {
"r_strategy": "index_lookup;array merge for partial match",
"r_loops": 4,
"r_index_lookups": 3,
"r_partial_matches": 1,
"r_partial_match_buffer_size": "REPLACED",
"r_partial_match_array_sizes": ["2"],
"query_block": {
"select_id": 2,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t2",
"access_type": "ALL",
"r_loops": 1,
"rows": 2,
"r_rows": 2,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100
}
}
}
}
]
}
}
# Force table scan partial matching
set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=on";
analyze format=json select * from t1 where a not in (select b from t2);
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t1",
"access_type": "ALL",
"r_loops": 1,
"rows": 4,
"r_rows": 4,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 50,
"attached_condition": "!<in_optimizer>(t1.a,t1.a in (subquery#2))"
},
"subqueries": [
{
"materialization": {
"r_strategy": "index_lookup;full scan for partial match",
"r_loops": 4,
"r_index_lookups": 3,
"r_partial_matches": 1,
"query_block": {
"select_id": 2,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t2",
"access_type": "ALL",
"r_loops": 1,
"rows": 2,
"r_rows": 2,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100
}
}
}
}
]
}
}
# Subselect in GROUP BY
analyze format=json select a from t1 group by a in (select b from t2);
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"filesort": {
"sort_key": "<in_optimizer>(t1.a,t1.a in (subquery#2))",
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"r_used_priority_queue": false,
"r_output_rows": 3,
"r_buffer_size": "REPLACED",
"r_sort_mode": "sort_key,rowid",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"r_loops": 1,
"rows": 4,
"r_rows": 4,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100
},
"subqueries": [
{
"materialization": {
"r_strategy": "index_lookup;full scan for partial match",
"r_loops": 4,
"r_index_lookups": 3,
"r_partial_matches": 1,
"query_block": {
"select_id": 2,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t2",
"access_type": "ALL",
"r_loops": 1,
"rows": 2,
"r_rows": 2,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100
}
}
}
}
]
}
}
}
}
set @@optimizer_switch="partial_match_rowid_merge=on,partial_match_table_scan=off";
analyze format=json select a from t1 group by a not in (select b from t2);
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"filesort": {
"sort_key": "!<in_optimizer>(t1.a,t1.a in (subquery#2))",
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"r_used_priority_queue": false,
"r_output_rows": 3,
"r_buffer_size": "REPLACED",
"r_sort_mode": "sort_key,rowid",
"temporary_table": {
"table": {
"table_name": "t1",
"access_type": "ALL",
"r_loops": 1,
"rows": 4,
"r_rows": 4,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100
},
"subqueries": [
{
"materialization": {
"r_strategy": "index_lookup;array merge for partial match",
"r_loops": 4,
"r_index_lookups": 3,
"r_partial_matches": 1,
"r_partial_match_buffer_size": "REPLACED",
"r_partial_match_array_sizes": ["2"],
"query_block": {
"select_id": 2,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t2",
"access_type": "ALL",
"r_loops": 1,
"rows": 2,
"r_rows": 2,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100
}
}
}
}
]
}
}
}
}
set @@optimizer_switch="partial_match_rowid_merge=on,partial_match_table_scan=on";
# Subselect in ORDER BY
analyze format=json select a from t1 order by a in (select b from t2);
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"read_sorted_file": {
"r_rows": 4,
"filesort": {
"sort_key": "<in_optimizer>(t1.a,t1.a in (subquery#2))",
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"r_used_priority_queue": false,
"r_output_rows": 4,
"r_buffer_size": "REPLACED",
"r_sort_mode": "sort_key,addon_fields",
"table": {
"table_name": "t1",
"access_type": "ALL",
"r_loops": 1,
"rows": 4,
"r_rows": 4,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100
}
}
},
"subqueries": [
{
"materialization": {
"r_strategy": "index_lookup;full scan for partial match",
"r_loops": 4,
"r_index_lookups": 3,
"r_partial_matches": 1,
"query_block": {
"select_id": 2,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t2",
"access_type": "ALL",
"r_loops": 1,
"rows": 2,
"r_rows": 2,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100
}
}
}
}
]
}
}
# Subselect in HAVING
analyze format=json select a from t1 having a not in (select b from t2);
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"having_condition": "!<in_optimizer>(t1.a,t1.a in (subquery#2))",
"table": {
"table_name": "t1",
"access_type": "ALL",
"r_loops": 1,
"rows": 4,
"r_rows": 4,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100
},
"subqueries": [
{
"materialization": {
"r_strategy": "index_lookup;full scan for partial match",
"r_loops": 4,
"r_index_lookups": 3,
"r_partial_matches": 1,
"query_block": {
"select_id": 2,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t2",
"access_type": "ALL",
"r_loops": 1,
"rows": 2,
"r_rows": 2,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100
}
}
}
}
]
}
}
# Nested IN
analyze format=json select a from t1 where a in (select a from t1 where a in (select b from t2));
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t1",
"access_type": "ALL",
"r_loops": 1,
"rows": 4,
"r_rows": 4,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 25,
"attached_condition": "<in_optimizer>(t1.a,t1.a in (subquery#2))"
},
"subqueries": [
{
"materialization": {
"r_strategy": "index_lookup",
"r_loops": 3,
"query_block": {
"select_id": 2,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t1",
"access_type": "ALL",
"r_loops": 1,
"rows": 4,
"r_rows": 4,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 25,
"attached_condition": "<in_optimizer>(t1.a,t1.a in (subquery#3))"
},
"subqueries": [
{
"materialization": {
"r_strategy": "index_lookup",
"r_loops": 3,
"query_block": {
"select_id": 3,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t2",
"access_type": "ALL",
"r_loops": 1,
"rows": 2,
"r_rows": 2,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100
}
}
}
}
]
}
}
}
]
}
}
create table t3 (c int);
insert into t3 (c) values (3), (null), (4);
# Subquery in ON-clause of outer join
analyze format=json select a from t1 left join t2 on a not in (select c from t3);
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"const_condition": "1",
"table": {
"table_name": "t1",
"access_type": "ALL",
"r_loops": 1,
"rows": 4,
"r_rows": 4,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100
},
"block-nl-join": {
"table": {
"table_name": "t2",
"access_type": "ALL",
"r_loops": 1,
"rows": 2,
"r_rows": 2,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100
},
"buffer_type": "flat",
"buffer_size": "87",
"join_type": "BNL",
"attached_condition": "trigcond(trigcond(!<in_optimizer>(t1.a,t1.a in (subquery#2))))",
"r_filtered": 50,
"r_unpack_time_ms": "REPLACED"
},
"subqueries": [
{
"materialization": {
"r_strategy": "index_lookup;full scan for partial match",
"r_loops": 4,
"r_index_lookups": 3,
"query_block": {
"select_id": 2,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t3",
"access_type": "ALL",
"r_loops": 1,
"rows": 3,
"r_rows": 3,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100
}
}
}
}
]
}
}
analyze format=json
select (b, b + 1, b + 2) not in
(select count(distinct a), a + 1, a + 2 from t1 group by a + 1, a + 2)
from t2;
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t2",
"access_type": "ALL",
"r_loops": 1,
"rows": 2,
"r_rows": 2,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100
},
"subqueries": [
{
"materialization": {
"r_strategy": "index_lookup;full scan for partial match",
"r_loops": 2,
"r_index_lookups": 2,
"r_partial_matches": 2,
"query_block": {
"select_id": 2,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"read_sorted_file": {
"r_rows": 4,
"filesort": {
"sort_key": "t1.a + 1, t1.a + 2",
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"r_used_priority_queue": false,
"r_output_rows": 4,
"r_buffer_size": "REPLACED",
"r_sort_mode": "sort_key,addon_fields",
"table": {
"table_name": "t1",
"access_type": "ALL",
"r_loops": 1,
"rows": 4,
"r_rows": 4,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100
}
}
}
}
}
}
]
}
}
drop table t1, t2, t3;
#
# Tables with more than one column
#
create table t1 (a1 char(1), a2 char(1));
insert into t1 values (null, 'b');
create table t2 (b1 char(1), b2 char(2));
insert into t2 values ('a','b'), ('c', 'd'), (null, 'e'), ('f', 'g');
set @@optimizer_switch="partial_match_rowid_merge=on,partial_match_table_scan=off";
explain format=json select * from t1 where (a1, a2) not in (select b1, b2 from t2);
EXPLAIN
{
"query_block": {
"select_id": 1,
"const_condition": "!<in_optimizer>((NULL,'b'),(NULL,'b') in (subquery#2))",
"table": {
"table_name": "t1",
"access_type": "system",
"rows": 1,
"filtered": 100
},
"subqueries": [
{
"materialization": {
"query_block": {
"select_id": 2,
"table": {
"table_name": "t2",
"access_type": "ALL",
"rows": 4,
"filtered": 100
}
}
}
}
]
}
}
analyze format=json select * from t1 where (a1, a2) not in (select b1, b2 from t2);
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"const_condition": "!<in_optimizer>((NULL,'b'),(NULL,'b') in (subquery#2))",
"table": {
"table_name": "t1",
"access_type": "system",
"r_loops": 0,
"rows": 1,
"r_rows": null,
"filtered": 100,
"r_filtered": null
},
"subqueries": [
{
"materialization": {
"r_strategy": "index_lookup;array merge for partial match",
"r_loops": 1,
"r_partial_matches": 1,
"r_partial_match_buffer_size": "REPLACED",
"r_partial_match_array_sizes": ["4", "3"],
"query_block": {
"select_id": 2,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t2",
"access_type": "ALL",
"r_loops": 1,
"rows": 4,
"r_rows": 4,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100
}
}
}
}
]
}
}
set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=on";
analyze format=json select * from t1 where (a1, a2) not in (select b1, b2 from t2);
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"const_condition": "!<in_optimizer>((NULL,'b'),(NULL,'b') in (subquery#2))",
"table": {
"table_name": "t1",
"access_type": "system",
"r_loops": 0,
"rows": 1,
"r_rows": null,
"filtered": 100,
"r_filtered": null
},
"subqueries": [
{
"materialization": {
"r_strategy": "index_lookup;full scan for partial match",
"r_loops": 1,
"r_partial_matches": 1,
"query_block": {
"select_id": 2,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t2",
"access_type": "ALL",
"r_loops": 1,
"rows": 4,
"r_rows": 4,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100
}
}
}
}
]
}
}
# Subquery in SELECT list
explain format=json select t1.*, (a1, a2) in (select * from t2) as in_res from t1;
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "system",
"rows": 1,
"filtered": 100
},
"subqueries": [
{
"materialization": {
"query_block": {
"select_id": 2,
"table": {
"table_name": "t2",
"access_type": "ALL",
"rows": 4,
"filtered": 100
}
}
}
}
]
}
}
analyze format=json select t1.*, (a1, a2) in (select * from t2) as in_res from t1;
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t1",
"access_type": "system",
"r_loops": 0,
"rows": 1,
"r_rows": null,
"filtered": 100,
"r_filtered": null
},
"subqueries": [
{
"materialization": {
"r_strategy": "index_lookup;full scan for partial match",
"r_loops": 1,
"r_partial_matches": 1,
"query_block": {
"select_id": 2,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t2",
"access_type": "ALL",
"r_loops": 1,
"rows": 4,
"r_rows": 4,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100
}
}
}
}
]
}
}
analyze format=json select t1.*, (a1, a2) not in (select * from t2) as in_res from t1;
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t1",
"access_type": "system",
"r_loops": 0,
"rows": 1,
"r_rows": null,
"filtered": 100,
"r_filtered": null
},
"subqueries": [
{
"materialization": {
"r_strategy": "index_lookup;full scan for partial match",
"r_loops": 1,
"r_partial_matches": 1,
"query_block": {
"select_id": 2,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t2",
"access_type": "ALL",
"r_loops": 1,
"rows": 4,
"r_rows": 4,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100
}
}
}
}
]
}
}
set @@optimizer_switch="partial_match_rowid_merge=on,partial_match_table_scan=off";
analyze format=json select t1.*, (a1, a2) in (select * from t2) as in_res from t1;
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t1",
"access_type": "system",
"r_loops": 0,
"rows": 1,
"r_rows": null,
"filtered": 100,
"r_filtered": null
},
"subqueries": [
{
"materialization": {
"r_strategy": "index_lookup;array merge for partial match",
"r_loops": 1,
"r_partial_matches": 1,
"r_partial_match_buffer_size": "REPLACED",
"r_partial_match_array_sizes": ["4", "3"],
"query_block": {
"select_id": 2,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t2",
"access_type": "ALL",
"r_loops": 1,
"rows": 4,
"r_rows": 4,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100
}
}
}
}
]
}
}
analyze format=json select t1.*, (a1, a2) not in (select * from t2) as in_res from t1;
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t1",
"access_type": "system",
"r_loops": 0,
"rows": 1,
"r_rows": null,
"filtered": 100,
"r_filtered": null
},
"subqueries": [
{
"materialization": {
"r_strategy": "index_lookup;array merge for partial match",
"r_loops": 1,
"r_partial_matches": 1,
"r_partial_match_buffer_size": "REPLACED",
"r_partial_match_array_sizes": ["4", "3"],
"query_block": {
"select_id": 2,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t2",
"access_type": "ALL",
"r_loops": 1,
"rows": 4,
"r_rows": 4,
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 100
}
}
}
}
]
}
}
drop table t1,t2;
set @@optimizer_switch=@save_optimizer_switch;
mysql-test/main/subselect_mat_analyze_json.test 0 → 100644
View file @ aae3233c
set @save_optimizer_switch=@@optimizer_switch;
create table t1 (a int);
create table t2 (b int);
insert into t1 values (null), (1), (2), (3);
insert into t2 values (3), (4);
set @@optimizer_switch = "materialization=on,in_to_exists=off,semijoin=off";
explain format=json select * from t1 where a in (select b from t2);
--echo # "Complete match" execution strategy
--source include/analyze-format.inc
analyze format=json select * from t1 where a in (select b from t2);
--echo # "Partial match" is used due to NOT IN
--echo # Force rowid-merge partial partial matching
set @@optimizer_switch="partial_match_rowid_merge=on,partial_match_table_scan=off";
--source include/analyze-format.inc
analyze format=json select * from t1 where a not in (select b from t2);
--echo # Force table scan partial matching
set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=on";
--source include/analyze-format.inc
analyze format=json select * from t1 where a not in (select b from t2);
--echo # Subselect in GROUP BY
--source include/analyze-format.inc
analyze format=json select a from t1 group by a in (select b from t2);
set @@optimizer_switch="partial_match_rowid_merge=on,partial_match_table_scan=off";
--source include/analyze-format.inc
analyze format=json select a from t1 group by a not in (select b from t2);
set @@optimizer_switch="partial_match_rowid_merge=on,partial_match_table_scan=on";
--echo # Subselect in ORDER BY
--source include/analyze-format.inc
analyze format=json select a from t1 order by a in (select b from t2);
--echo # Subselect in HAVING
--source include/analyze-format.inc
analyze format=json select a from t1 having a not in (select b from t2);
--echo # Nested IN
--source include/analyze-format.inc
analyze format=json select a from t1 where a in (select a from t1 where a in (select b from t2));
create table t3 (c int);
insert into t3 (c) values (3), (null), (4);
--echo # Subquery in ON-clause of outer join
--source include/analyze-format.inc
analyze format=json select a from t1 left join t2 on a not in (select c from t3);
--source include/analyze-format.inc
analyze format=json
select (b, b + 1, b + 2) not in
(select count(distinct a), a + 1, a + 2 from t1 group by a + 1, a + 2)
from t2;
drop table t1, t2, t3;
--echo #
--echo # Tables with more than one column
--echo #
create table t1 (a1 char(1), a2 char(1));
insert into t1 values (null, 'b');
create table t2 (b1 char(1), b2 char(2));
insert into t2 values ('a','b'), ('c', 'd'), (null, 'e'), ('f', 'g');
set @@optimizer_switch="partial_match_rowid_merge=on,partial_match_table_scan=off";
explain format=json select * from t1 where (a1, a2) not in (select b1, b2 from t2);
--source include/analyze-format.inc
analyze format=json select * from t1 where (a1, a2) not in (select b1, b2 from t2);
set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=on";
--source include/analyze-format.inc
analyze format=json select * from t1 where (a1, a2) not in (select b1, b2 from t2);
--echo # Subquery in SELECT list
explain format=json select t1.*, (a1, a2) in (select * from t2) as in_res from t1;
--source include/analyze-format.inc
analyze format=json select t1.*, (a1, a2) in (select * from t2) as in_res from t1;
--source include/analyze-format.inc
analyze format=json select t1.*, (a1, a2) not in (select * from t2) as in_res from t1;
set @@optimizer_switch="partial_match_rowid_merge=on,partial_match_table_scan=off";
--source include/analyze-format.inc
analyze format=json select t1.*, (a1, a2) in (select * from t2) as in_res from t1;
--source include/analyze-format.inc
analyze format=json select t1.*, (a1, a2) not in (select * from t2) as in_res from t1;
drop table t1,t2;
set @@optimizer_switch=@save_optimizer_switch;
sql/item_subselect.cc
View file @ aae3233c
...@@ -42,6 +42,7 @@ ...@@ -42,6 +42,7 @@
#include "sql_parse.h" // check_stack_overrun #include "sql_parse.h" // check_stack_overrun
#include "sql_cte.h" #include "sql_cte.h"
#include "sql_test.h" #include "sql_test.h"
#include "my_json_writer.h"
double get_post_group_estimate(JOIN* join, double join_op_rows); double get_post_group_estimate(JOIN* join, double join_op_rows);
...@@ -192,6 +193,7 @@ void Item_in_subselect::cleanup() ...@@ -192,6 +193,7 @@ void Item_in_subselect::cleanup()
in_strategy&= ~SUBS_STRATEGY_CHOSEN; in_strategy&= ~SUBS_STRATEGY_CHOSEN;
*/ */
first_execution= TRUE; first_execution= TRUE;
materialization_tracker= NULL;
pushed_cond_guards= NULL; pushed_cond_guards= NULL;
Item_subselect::cleanup(); Item_subselect::cleanup();
DBUG_VOID_RETURN; DBUG_VOID_RETURN;
...@@ -1602,6 +1604,7 @@ Item_in_subselect::Item_in_subselect(THD *thd, Item * left_exp, ...@@ -1602,6 +1604,7 @@ Item_in_subselect::Item_in_subselect(THD *thd, Item * left_exp,
st_select_lex *select_lex): st_select_lex *select_lex):
Item_exists_subselect(thd), left_expr_cache(0), first_execution(TRUE), Item_exists_subselect(thd), left_expr_cache(0), first_execution(TRUE),
in_strategy(SUBS_NOT_TRANSFORMED), in_strategy(SUBS_NOT_TRANSFORMED),
materialization_tracker(NULL),
pushed_cond_guards(NULL), do_not_convert_to_sj(FALSE), is_jtbm_merged(FALSE), pushed_cond_guards(NULL), do_not_convert_to_sj(FALSE), is_jtbm_merged(FALSE),
is_jtbm_const_tab(FALSE), is_flattenable_semijoin(FALSE), is_jtbm_const_tab(FALSE), is_flattenable_semijoin(FALSE),
is_registered_semijoin(FALSE), is_registered_semijoin(FALSE),
...@@ -3648,6 +3651,26 @@ bool Item_in_subselect::init_cond_guards() ...@@ -3648,6 +3651,26 @@ bool Item_in_subselect::init_cond_guards()
return FALSE; return FALSE;
} }
/**
Initialize the tracker which will be used to provide information for
the output of EXPLAIN and ANALYZE
*/
void Item_in_subselect::init_subq_materialization_tracker(THD *thd)
{
if (test_strategy(SUBS_MATERIALIZATION | SUBS_PARTIAL_MATCH_ROWID_MERGE |
SUBS_PARTIAL_MATCH_TABLE_SCAN))
{
Explain_query *qw= thd->lex->explain;
DBUG_ASSERT(qw);
Explain_node *node= qw->get_node(unit->first_select()->select_number);
if (!node)
return;
node->subq_materialization= new(qw->mem_root)
Explain_subq_materialization(qw->mem_root);
materialization_tracker= node->subq_materialization->get_tracker();
}
}
bool bool
Item_allany_subselect::select_transformer(JOIN *join) Item_allany_subselect::select_transformer(JOIN *join)
...@@ -4245,11 +4268,13 @@ int subselect_uniquesubquery_engine::exec() ...@@ -4245,11 +4268,13 @@ int subselect_uniquesubquery_engine::exec()
empty_result_set= TRUE; empty_result_set= TRUE;
table->status= 0; table->status= 0;
Item_in_subselect *in_subs= item->get_IN_subquery(); Item_in_subselect *in_subs= item->get_IN_subquery();
Subq_materialization_tracker *tracker= in_subs->get_materialization_tracker();
DBUG_ASSERT(in_subs); DBUG_ASSERT(in_subs);
if (!tab->preread_init_done && tab->preread_init()) if (!tab->preread_init_done && tab->preread_init())
DBUG_RETURN(1); DBUG_RETURN(1);
if (tracker)
tracker->increment_loops_count();
if (in_subs->left_expr_has_null()) if (in_subs->left_expr_has_null())
{ {
/* /*
...@@ -5002,6 +5027,9 @@ subselect_hash_sj_engine::choose_partial_match_strategy( ...@@ -5002,6 +5027,9 @@ subselect_hash_sj_engine::choose_partial_match_strategy(
partial_match_key_parts_arg); partial_match_key_parts_arg);
if (pm_buff_size > thd->variables.rowid_merge_buff_size) if (pm_buff_size > thd->variables.rowid_merge_buff_size)
strategy= PARTIAL_MATCH_SCAN; strategy= PARTIAL_MATCH_SCAN;
else
item->get_IN_subquery()->get_materialization_tracker()->
report_partial_match_buffer_size(pm_buff_size);
} }
} }
...@@ -5777,6 +5805,7 @@ int subselect_hash_sj_engine::exec() ...@@ -5777,6 +5805,7 @@ int subselect_hash_sj_engine::exec()
} }
} }
item_in->get_materialization_tracker()->report_exec_strategy(strategy);
if (pm_engine) if (pm_engine)
lookup_engine= pm_engine; lookup_engine= pm_engine;
item_in->change_engine(lookup_engine); item_in->change_engine(lookup_engine);
...@@ -6247,6 +6276,9 @@ int subselect_partial_match_engine::exec() ...@@ -6247,6 +6276,9 @@ int subselect_partial_match_engine::exec()
DBUG_ASSERT(!(item_in->left_expr_has_null() && DBUG_ASSERT(!(item_in->left_expr_has_null() &&
item_in->is_top_level_item())); item_in->is_top_level_item()));
Subq_materialization_tracker *tracker= item_in->get_materialization_tracker();
tracker->increment_loops_count();
if (!item_in->left_expr_has_null()) if (!item_in->left_expr_has_null())
{ {
/* Try to find a matching row by index lookup. */ /* Try to find a matching row by index lookup. */
...@@ -6260,6 +6292,7 @@ int subselect_partial_match_engine::exec() ...@@ -6260,6 +6292,7 @@ int subselect_partial_match_engine::exec()
else else
{ {
/* Search for a complete match. */ /* Search for a complete match. */
tracker->increment_index_lookups();
if ((lookup_res= lookup_engine->index_lookup())) if ((lookup_res= lookup_engine->index_lookup()))
{ {
/* An error occurred during lookup(). */ /* An error occurred during lookup(). */
...@@ -6304,6 +6337,7 @@ int subselect_partial_match_engine::exec() ...@@ -6304,6 +6337,7 @@ int subselect_partial_match_engine::exec()
if (tmp_table->file->inited) if (tmp_table->file->inited)
tmp_table->file->ha_index_end(); tmp_table->file->ha_index_end();
tracker->increment_partial_matches();
if (partial_match()) if (partial_match())
{ {
/* The result of IN is UNKNOWN. */ /* The result of IN is UNKNOWN. */
...@@ -6510,6 +6544,8 @@ subselect_rowid_merge_engine::init(MY_BITMAP *non_null_key_parts, ...@@ -6510,6 +6544,8 @@ subselect_rowid_merge_engine::init(MY_BITMAP *non_null_key_parts,
0, 0)) 0, 0))
return TRUE; return TRUE;
item->get_IN_subquery()->get_materialization_tracker()->
report_partial_merge_keys(merge_keys, merge_keys_count);
return FALSE; return FALSE;
} }
...@@ -6966,3 +7002,12 @@ void Item_subselect::init_expr_cache_tracker(THD *thd) ...@@ -6966,3 +7002,12 @@ void Item_subselect::init_expr_cache_tracker(THD *thd)
DBUG_ASSERT(expr_cache->type() == Item::EXPR_CACHE_ITEM); DBUG_ASSERT(expr_cache->type() == Item::EXPR_CACHE_ITEM);
node->cache_tracker= ((Item_cache_wrapper *)expr_cache)->init_tracker(qw->mem_root); node->cache_tracker= ((Item_cache_wrapper *)expr_cache)->init_tracker(qw->mem_root);
} }
void Subq_materialization_tracker::report_partial_merge_keys(
Ordered_key **merge_keys, uint merge_keys_count)
{
partial_match_array_sizes.resize(merge_keys_count, 0);
for (uint i= 0; i < merge_keys_count; i++)
partial_match_array_sizes[i]= merge_keys[i]->get_key_buff_elements();
}
sql/item_subselect.h
View file @ aae3233c
...@@ -18,6 +18,7 @@ ...@@ -18,6 +18,7 @@
/* subselect Item */ /* subselect Item */
#include "item.h"
#ifdef USE_PRAGMA_INTERFACE #ifdef USE_PRAGMA_INTERFACE
#pragma interface /* gcc class implementation */ #pragma interface /* gcc class implementation */
#endif #endif
...@@ -43,6 +44,8 @@ typedef class st_select_lex SELECT_LEX; ...@@ -43,6 +44,8 @@ typedef class st_select_lex SELECT_LEX;
*/ */
typedef Comp_creator* (*chooser_compare_func_creator)(bool invert); typedef Comp_creator* (*chooser_compare_func_creator)(bool invert);
class Cached_item; class Cached_item;
class Subq_materialization_tracker;
class Explain_subq_materialization;
/* base class for subselects */ /* base class for subselects */
...@@ -501,6 +504,8 @@ class Item_in_subselect :public Item_exists_subselect ...@@ -501,6 +504,8 @@ class Item_in_subselect :public Item_exists_subselect
bool was_null; bool was_null;
/* A bitmap of possible execution strategies for an IN predicate. */ /* A bitmap of possible execution strategies for an IN predicate. */
uchar in_strategy; uchar in_strategy;
/* Tracker collecting execution parameters of a materialized subquery */
Subq_materialization_tracker *materialization_tracker;
protected: protected:
/* Used to trigger on/off conditions that were pushed down to subselect */ /* Used to trigger on/off conditions that were pushed down to subselect */
bool *pushed_cond_guards; bool *pushed_cond_guards;
...@@ -525,6 +530,7 @@ class Item_in_subselect :public Item_exists_subselect ...@@ -525,6 +530,7 @@ class Item_in_subselect :public Item_exists_subselect
left_expr could later be changed to something on the execution arena. left_expr could later be changed to something on the execution arena.
*/ */
Item *left_expr_orig; Item *left_expr_orig;
public: public:
/* Priority of this predicate in the convert-to-semi-join-nest process. */ /* Priority of this predicate in the convert-to-semi-join-nest process. */
int sj_convert_priority; int sj_convert_priority;
...@@ -626,7 +632,7 @@ class Item_in_subselect :public Item_exists_subselect ...@@ -626,7 +632,7 @@ class Item_in_subselect :public Item_exists_subselect
Item_in_subselect(THD *thd_arg, Item * left_expr, st_select_lex *select_lex); Item_in_subselect(THD *thd_arg, Item * left_expr, st_select_lex *select_lex);
Item_in_subselect(THD *thd_arg): Item_in_subselect(THD *thd_arg):
Item_exists_subselect(thd_arg), left_expr_cache(0), first_execution(TRUE), Item_exists_subselect(thd_arg), left_expr_cache(0), first_execution(TRUE),
in_strategy(SUBS_NOT_TRANSFORMED), in_strategy(SUBS_NOT_TRANSFORMED), materialization_tracker(NULL),
pushed_cond_guards(NULL), func(NULL), do_not_convert_to_sj(FALSE), pushed_cond_guards(NULL), func(NULL), do_not_convert_to_sj(FALSE),
is_jtbm_merged(FALSE), is_jtbm_const_tab(FALSE), upper_item(0), is_jtbm_merged(FALSE), is_jtbm_const_tab(FALSE), upper_item(0),
converted_from_in_predicate(FALSE) {} converted_from_in_predicate(FALSE) {}
...@@ -778,6 +784,9 @@ class Item_in_subselect :public Item_exists_subselect ...@@ -778,6 +784,9 @@ class Item_in_subselect :public Item_exists_subselect
{ return left_expr; } { return left_expr; }
inline Item* left_exp_orig() const inline Item* left_exp_orig() const
{ return left_expr_orig; } { return left_expr_orig; }
void init_subq_materialization_tracker(THD *thd);
Subq_materialization_tracker *get_materialization_tracker() const
{ return materialization_tracker; }
friend class Item_ref_null_helper; friend class Item_ref_null_helper;
friend class Item_is_not_null_test; friend class Item_is_not_null_test;
...@@ -1159,6 +1168,15 @@ class subselect_hash_sj_engine : public subselect_engine ...@@ -1159,6 +1168,15 @@ class subselect_hash_sj_engine : public subselect_engine
select_result_interceptor *result, select_result_interceptor *result,
bool temp= FALSE) override; bool temp= FALSE) override;
bool no_tables() const override;//=>base class bool no_tables() const override;//=>base class
/* Possible execution strategies that can be used to compute hash semi-join.*/
enum exec_strategy {
UNDEFINED= 0,
COMPLETE_MATCH, /* Use regular index lookups. */
PARTIAL_MATCH, /* Use some partial matching strategy. */
PARTIAL_MATCH_MERGE, /* Use partial matching through index merging. */
PARTIAL_MATCH_SCAN, /* Use partial matching through table scan. */
IMPOSSIBLE /* Subquery materialization is not applicable. */
};
protected: protected:
/* The engine used to compute the IN predicate. */ /* The engine used to compute the IN predicate. */
...@@ -1170,15 +1188,6 @@ class subselect_hash_sj_engine : public subselect_engine ...@@ -1170,15 +1188,6 @@ class subselect_hash_sj_engine : public subselect_engine
uint count_partial_match_columns; uint count_partial_match_columns;
uint count_null_only_columns; uint count_null_only_columns;
uint count_columns_with_nulls; uint count_columns_with_nulls;
/* Possible execution strategies that can be used to compute hash semi-join.*/
enum exec_strategy {
UNDEFINED,
COMPLETE_MATCH, /* Use regular index lookups. */
PARTIAL_MATCH, /* Use some partial matching strategy. */
PARTIAL_MATCH_MERGE, /* Use partial matching through index merging. */
PARTIAL_MATCH_SCAN, /* Use partial matching through table scan. */
IMPOSSIBLE /* Subquery materialization is not applicable. */
};
/* The chosen execution strategy. Computed after materialization. */ /* The chosen execution strategy. Computed after materialization. */
exec_strategy strategy; exec_strategy strategy;
exec_strategy get_strategy_using_schema(); exec_strategy get_strategy_using_schema();
...@@ -1311,6 +1320,7 @@ class Ordered_key : public Sql_alloc ...@@ -1311,6 +1320,7 @@ class Ordered_key : public Sql_alloc
rownum_t get_max_null_row() { return max_null_row; } rownum_t get_max_null_row() { return max_null_row; }
MY_BITMAP * get_null_key() { return &null_key; } MY_BITMAP * get_null_key() { return &null_key; }
ha_rows get_null_count() { return null_count; } ha_rows get_null_count() { return null_count; }
ha_rows get_key_buff_elements() { return key_buff_elements; }
/* /*
Get the search key element that corresponds to the i-th key part of this Get the search key element that corresponds to the i-th key part of this
index. index.
...@@ -1548,4 +1558,93 @@ class subselect_table_scan_engine: public subselect_partial_match_engine ...@@ -1548,4 +1558,93 @@ class subselect_table_scan_engine: public subselect_partial_match_engine
void cleanup() override; void cleanup() override;
enum_engine_type engine_type() override { return TABLE_SCAN_ENGINE; } enum_engine_type engine_type() override { return TABLE_SCAN_ENGINE; }
}; };
/**
@brief Subquery materialization tracker
@details
Used to track various parameters of the materialized subquery execution,
such as the execution strategy, sizes of buffers employed, etc
*/
class Subq_materialization_tracker
{
public:
using Strategy = subselect_hash_sj_engine::exec_strategy;
Subq_materialization_tracker(MEM_ROOT *mem_root)
: exec_strategy(Strategy::UNDEFINED),
partial_match_buffer_size(0),
partial_match_array_sizes(mem_root),
loops_count(0),
index_lookups_count(0),
partial_matches_count(0)
{}
void report_partial_merge_keys(Ordered_key **merge_keys,
uint merge_keys_count);
void report_exec_strategy(Strategy es)
{
exec_strategy= es;
}
void report_partial_match_buffer_size(longlong sz)
{
partial_match_buffer_size= sz;
}
void increment_loops_count()
{
loops_count++;
}
void increment_index_lookups()
{
index_lookups_count++;
}
void increment_partial_matches()
{
partial_matches_count++;
}
void print_json_members(Json_writer *writer) const;
private:
Strategy exec_strategy;
ulonglong partial_match_buffer_size;
Dynamic_array<ha_rows> partial_match_array_sizes;
/* Number of times subquery predicate was evaluated */
ulonglong loops_count;
/*
Number of times we made a lookup in the materialized temptable
(we do this when all parts of left_expr are not NULLs)
*/
ulonglong index_lookups_count;
/*
Number of times we had to check for a partial match (either by
scanning the materialized subquery or by doing a merge)
*/
ulonglong partial_matches_count;
const char *get_exec_strategy() const
{
switch (exec_strategy)
{
case Strategy::UNDEFINED:
return "undefined";
case Strategy::COMPLETE_MATCH:
return "index_lookup";
case Strategy::PARTIAL_MATCH_MERGE:
return "index_lookup;array merge for partial match";
case Strategy::PARTIAL_MATCH_SCAN:
return "index_lookup;full scan for partial match";
default:
return "unsupported";
}
}
};
#endif /* ITEM_SUBSELECT_INCLUDED */ #endif /* ITEM_SUBSELECT_INCLUDED */
sql/sql_array.h
View file @ aae3233c
...@@ -140,12 +140,24 @@ template <class Elem> class Dynamic_array ...@@ -140,12 +140,24 @@ template <class Elem> class Dynamic_array
DBUG_ASSERT(idx < array.elements); DBUG_ASSERT(idx < array.elements);
return *(((Elem*)array.buffer) + idx); return *(((Elem*)array.buffer) + idx);
} }
/// Const variant of at(), which cannot change data /// Const variant of at(), which cannot change data
const Elem& at(size_t idx) const const Elem& at(size_t idx) const
{ {
return *(((Elem*)array.buffer) + idx); return *(((Elem*)array.buffer) + idx);
} }
Elem& operator[](size_t idx)
{
return at(idx);
}
/// Const variant of operator[]
const Elem& operator[](size_t idx) const
{
return at(idx);
}
/// @returns pointer to first element /// @returns pointer to first element
Elem *front() Elem *front()
{ {
......
sql/sql_explain.cc
View file @ aae3233c
...@@ -24,6 +24,7 @@ ...@@ -24,6 +24,7 @@
#include "my_json_writer.h" #include "my_json_writer.h"
#include "opt_range.h" #include "opt_range.h"
#include "sql_expression_cache.h" #include "sql_expression_cache.h"
#include "item_subselect.h"
const char * STR_DELETING_ALL_ROWS= "Deleting all rows"; const char * STR_DELETING_ALL_ROWS= "Deleting all rows";
const char * STR_IMPOSSIBLE_WHERE= "Impossible WHERE"; const char * STR_IMPOSSIBLE_WHERE= "Impossible WHERE";
...@@ -782,6 +783,18 @@ bool Explain_node::print_explain_json_cache(Json_writer *writer, ...@@ -782,6 +783,18 @@ bool Explain_node::print_explain_json_cache(Json_writer *writer,
} }
bool Explain_node::print_explain_json_subq_materialization(Json_writer *writer,
bool is_analyze)
{
if (subq_materialization)
{
subq_materialization->print_explain_json(writer, is_analyze);
return true;
}
return false;
}
Explain_basic_join::~Explain_basic_join() Explain_basic_join::~Explain_basic_join()
{ {
if (join_tabs) if (join_tabs)
...@@ -929,6 +942,8 @@ void Explain_select::print_explain_json(Explain_query *query, ...@@ -929,6 +942,8 @@ void Explain_select::print_explain_json(Explain_query *query,
Json_writer_nesting_guard guard(writer); Json_writer_nesting_guard guard(writer);
bool started_cache= print_explain_json_cache(writer, is_analyze); bool started_cache= print_explain_json_cache(writer, is_analyze);
bool started_subq_mat= print_explain_json_subq_materialization(writer,
is_analyze);
if (message || if (message ||
select_type == pushed_derived_text || select_type == pushed_derived_text ||
...@@ -1032,6 +1047,8 @@ void Explain_select::print_explain_json(Explain_query *query, ...@@ -1032,6 +1047,8 @@ void Explain_select::print_explain_json(Explain_query *query,
writer->end_object(); writer->end_object();
} }
if (started_subq_mat)
writer->end_object();
if (started_cache) if (started_cache)
writer->end_object(); writer->end_object();
} }
...@@ -2693,3 +2710,41 @@ void Explain_range_checked_fer::print_json(Json_writer *writer, ...@@ -2693,3 +2710,41 @@ void Explain_range_checked_fer::print_json(Json_writer *writer,
writer->end_object(); writer->end_object();
} }
} }
void Explain_subq_materialization::print_explain_json(Json_writer *writer,
bool is_analyze)
{
writer->add_member("materialization").start_object();
if (is_analyze)
tracker.print_json_members(writer);
}
void Subq_materialization_tracker::print_json_members(Json_writer *writer) const
{
writer->add_member("r_strategy").add_str(get_exec_strategy());
if (loops_count)
writer->add_member("r_loops").add_ull(loops_count);
if (index_lookups_count)
writer->add_member("r_index_lookups").add_ull(index_lookups_count);
if (partial_matches_count)
writer->add_member("r_partial_matches").add_ull(partial_matches_count);
if (partial_match_buffer_size)
{
writer->add_member("r_partial_match_buffer_size").
add_size(partial_match_buffer_size);
}
if (partial_match_array_sizes.elements())
{
writer->add_member("r_partial_match_array_sizes").start_array();
for(size_t i= 0; i < partial_match_array_sizes.elements(); i++)
writer->add_ull(partial_match_array_sizes[i]);
writer->end_array();
}
}
sql/sql_explain.h
View file @ aae3233c
...@@ -86,6 +86,7 @@ class Explain_node : public Sql_alloc ...@@ -86,6 +86,7 @@ class Explain_node : public Sql_alloc
public: public:
Explain_node(MEM_ROOT *root) : Explain_node(MEM_ROOT *root) :
cache_tracker(NULL), cache_tracker(NULL),
subq_materialization(NULL),
connection_type(EXPLAIN_NODE_OTHER), connection_type(EXPLAIN_NODE_OTHER),
children(root) children(root)
{} {}
...@@ -115,6 +116,12 @@ class Explain_node : public Sql_alloc ...@@ -115,6 +116,12 @@ class Explain_node : public Sql_alloc
*/ */
Expression_cache_tracker* cache_tracker; Expression_cache_tracker* cache_tracker;
/**
If not NULL, this node is a SELECT (or UNION) in a materialized
IN-subquery.
*/
Explain_subq_materialization* subq_materialization;
/* /*
How this node is connected to its parent. How this node is connected to its parent.
(NOTE: EXPLAIN_NODE_NON_MERGED_SJ is set very late currently) (NOTE: EXPLAIN_NODE_NON_MERGED_SJ is set very late currently)
...@@ -143,6 +150,8 @@ class Explain_node : public Sql_alloc ...@@ -143,6 +150,8 @@ class Explain_node : public Sql_alloc
void print_explain_json_for_children(Explain_query *query, void print_explain_json_for_children(Explain_query *query,
Json_writer *writer, bool is_analyze); Json_writer *writer, bool is_analyze);
bool print_explain_json_cache(Json_writer *writer, bool is_analyze); bool print_explain_json_cache(Json_writer *writer, bool is_analyze);
bool print_explain_json_subq_materialization(Json_writer *writer,
bool is_analyze);
virtual ~Explain_node() = default; virtual ~Explain_node() = default;
}; };
...@@ -1003,4 +1012,26 @@ class Explain_delete: public Explain_update ...@@ -1003,4 +1012,26 @@ class Explain_delete: public Explain_update
}; };
/*
EXPLAIN data structure for subquery materialization.
All decisions are made at execution time so here we just store the tracker
that has all the info.
*/
class Explain_subq_materialization : public Sql_alloc
{
public:
Explain_subq_materialization(MEM_ROOT *mem_root)
: tracker(mem_root)
{}
Subq_materialization_tracker *get_tracker() { return &tracker; }
void print_explain_json(Json_writer *writer, bool is_analyze);
private:
Subq_materialization_tracker tracker;
};
#endif //SQL_EXPLAIN_INCLUDED #endif //SQL_EXPLAIN_INCLUDED
sql/sql_select.cc
View file @ aae3233c
...@@ -1729,6 +1729,11 @@ bool JOIN::build_explain() ...@@ -1729,6 +1729,11 @@ bool JOIN::build_explain()
curr_tab->tracker= tmp->get_using_temporary_read_tracker(); curr_tab->tracker= tmp->get_using_temporary_read_tracker();
} }
} }
if (is_in_subquery())
{
Item_in_subselect *subq= unit->item->get_IN_subquery();
subq->init_subq_materialization_tracker(thd);
}
DBUG_RETURN(0); DBUG_RETURN(0);
} }
......
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