From a7abddeffa6a760ce948c2dfb007cdf3f1a369d5 Mon Sep 17 00:00:00 2001 From: Michael Widenius Date: Fri, 9 Mar 2018 14:05:35 +0200 Subject: Create 'main' test directory and move 't' and 'r' there --- mysql-test/r/explain_json.result | 1646 -------------------------------------- 1 file changed, 1646 deletions(-) delete mode 100644 mysql-test/r/explain_json.result (limited to 'mysql-test/r/explain_json.result') diff --git a/mysql-test/r/explain_json.result b/mysql-test/r/explain_json.result deleted file mode 100644 index ef6b70aff71..00000000000 --- a/mysql-test/r/explain_json.result +++ /dev/null @@ -1,1646 +0,0 @@ -drop table if exists t0,t1,t2; -create table t0(a int); -insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); -explain format=json select * from t0; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t0", - "access_type": "ALL", - "rows": 10, - "filtered": 100 - } - } -} -explain format=json select * from t0 where 1>2; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "message": "Impossible WHERE" - } - } -} -explain format=json select * from t0 where a<3; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t0", - "access_type": "ALL", - "rows": 10, - "filtered": 100, - "attached_condition": "t0.a < 3" - } - } -} -# Try a basic join -create table t1 (a int, b int, filler char(32), key(a)); -insert into t1 -select -a.a + b.a* 10 + c.a * 100, -a.a + b.a* 10 + c.a * 100, -'filler' -from t0 a, t0 b, t0 c; -explain format=json select * from t0,t1 where t1.a=t0.a; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t0", - "access_type": "ALL", - "rows": 10, - "filtered": 100, - "attached_condition": "t0.a is not null" - }, - "table": { - "table_name": "t1", - "access_type": "ref", - "possible_keys": ["a"], - "key": "a", - "key_length": "5", - "used_key_parts": ["a"], - "ref": ["test.t0.a"], - "rows": 1, - "filtered": 100 - } - } -} -# Try range and index_merge -create table t2 (a1 int, a2 int, b1 int, b2 int, key(a1,a2), key(b1,b2)); -insert into t2 select a,a,a,a from t1; -explain format=json select * from t2 where a1<5; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t2", - "access_type": "range", - "possible_keys": ["a1"], - "key": "a1", - "key_length": "5", - "used_key_parts": ["a1"], - "rows": 5, - "filtered": 100, - "index_condition": "t2.a1 < 5" - } - } -} -explain format=json select * from t2 where a1=1 or b1=2; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t2", - "access_type": "index_merge", - "possible_keys": ["a1", "b1"], - "key_length": "5,5", - "index_merge": { - "sort_union": { - "range": { - "key": "a1", - "used_key_parts": ["a1"] - }, - "range": { - "key": "b1", - "used_key_parts": ["b1"] - } - } - }, - "rows": 2, - "filtered": 100, - "attached_condition": "t2.a1 = 1 or t2.b1 = 2" - } - } -} -explain format=json select * from t2 where a1=1 or (b1=2 and b2=3); -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t2", - "access_type": "index_merge", - "possible_keys": ["a1", "b1"], - "key_length": "5,10", - "index_merge": { - "sort_union": { - "range": { - "key": "a1", - "used_key_parts": ["a1"] - }, - "range": { - "key": "b1", - "used_key_parts": ["b1", "b2"] - } - } - }, - "rows": 2, - "filtered": 100, - "attached_condition": "t2.a1 = 1 or t2.b1 = 2 and t2.b2 = 3" - } - } -} -explain format=json select * from t2 where (a1=1 and a2=1) or -(b1=2 and b2=1); -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t2", - "access_type": "index_merge", - "possible_keys": ["a1", "b1"], - "key_length": "10,10", - "index_merge": { - "union": { - "range": { - "key": "a1", - "used_key_parts": ["a1", "a2"] - }, - "range": { - "key": "b1", - "used_key_parts": ["b1", "b2"] - } - } - }, - "rows": 2, - "filtered": 100, - "attached_condition": "t2.a1 = 1 and t2.a2 = 1 or t2.b1 = 2 and t2.b2 = 1" - } - } -} -# Try ref access on two key components -explain format=json select * from t0,t2 where t2.b1=t0.a and t2.b2=4; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t0", - "access_type": "ALL", - "rows": 10, - "filtered": 100, - "attached_condition": "t0.a is not null" - }, - "table": { - "table_name": "t2", - "access_type": "ref", - "possible_keys": ["b1"], - "key": "b1", - "key_length": "10", - "used_key_parts": ["b1", "b2"], - "ref": ["test.t0.a", "const"], - "rows": 1, - "filtered": 100 - } - } -} -drop table t1,t2; -# -# Try a UNION -# -explain format=json select * from t0 A union select * from t0 B; -EXPLAIN -{ - "query_block": { - "union_result": { - "table_name": "", - "access_type": "ALL", - "query_specifications": [ - { - "query_block": { - "select_id": 1, - "table": { - "table_name": "A", - "access_type": "ALL", - "rows": 10, - "filtered": 100 - } - } - }, - { - "query_block": { - "select_id": 2, - "operation": "UNION", - "table": { - "table_name": "B", - "access_type": "ALL", - "rows": 10, - "filtered": 100 - } - } - } - ] - } - } -} -explain format=json select * from t0 A union all select * from t0 B; -EXPLAIN -{ - "query_block": { - "union_result": { - "table_name": "", - "access_type": "ALL", - "query_specifications": [ - { - "query_block": { - "select_id": 1, - "table": { - "table_name": "A", - "access_type": "ALL", - "rows": 10, - "filtered": 100 - } - } - }, - { - "query_block": { - "select_id": 2, - "operation": "UNION", - "table": { - "table_name": "B", - "access_type": "ALL", - "rows": 10, - "filtered": 100 - } - } - } - ] - } - } -} -# -# Subqueries -# -create table t1 (a int, b int); -insert into t1 select a,a from t0; -explain format=json select a, a > (select max(b) from t1 where t1.b=t0.a) from t0; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t0", - "access_type": "ALL", - "rows": 10, - "filtered": 100 - }, - "subqueries": [ - { - "expression_cache": { - "state": "uninitialized", - "query_block": { - "select_id": 2, - "table": { - "table_name": "t1", - "access_type": "ALL", - "rows": 10, - "filtered": 100, - "attached_condition": "t1.b = t0.a" - } - } - } - } - ] - } -} -explain format=json -select * from t0 where -a > (select max(b) from t1 where t1.b=t0.a) or a < 3 ; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t0", - "access_type": "ALL", - "rows": 10, - "filtered": 100, - "attached_condition": "t0.a > (subquery#2) or t0.a < 3" - }, - "subqueries": [ - { - "expression_cache": { - "state": "uninitialized", - "query_block": { - "select_id": 2, - "table": { - "table_name": "t1", - "access_type": "ALL", - "rows": 10, - "filtered": 100, - "attached_condition": "t1.b = t0.a" - } - } - } - } - ] - } -} -drop table t1; -# -# Join buffering -# -create table t1 (a int, b int); -insert into t1 select tbl1.a+10*tbl2.a, tbl1.a+10*tbl2.a from t0 tbl1, t0 tbl2; -explain format=json -select * from t1 tbl1, t1 tbl2 where tbl1.a=tbl2.a and tbl1.b < 3 and tbl2.b < 5; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "tbl1", - "access_type": "ALL", - "rows": 100, - "filtered": 100, - "attached_condition": "tbl1.b < 3" - }, - "block-nl-join": { - "table": { - "table_name": "tbl2", - "access_type": "ALL", - "rows": 100, - "filtered": 100, - "attached_condition": "tbl2.b < 5" - }, - "buffer_type": "flat", - "buffer_size": "256Kb", - "join_type": "BNL", - "attached_condition": "tbl2.a = tbl1.a" - } - } -} -drop table t1; -# -# Single-table UPDATE/DELETE, INSERT -# -explain format=json delete from t0; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "message": "Deleting all rows" - } - } -} -explain format=json delete from t0 where 1 > 2; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "message": "Impossible WHERE" - } - } -} -explain format=json delete from t0 where a < 3; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "delete": 1, - "table_name": "t0", - "access_type": "ALL", - "rows": 10, - "attached_condition": "t0.a < 3" - } - } -} -explain format=json update t0 set a=3 where a in (2,3,4); -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "update": 1, - "table_name": "t0", - "access_type": "ALL", - "rows": 10, - "attached_condition": "t0.a in (2,3,4)" - } - } -} -explain format=json insert into t0 values (1); -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t0" - } - } -} -create table t1 like t0; -explain format=json insert into t1 values ((select max(a) from t0)); -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t1" - }, - "subqueries": [ - { - "query_block": { - "select_id": 2, - "table": { - "table_name": "t0", - "access_type": "ALL", - "rows": 10, - "filtered": 100 - } - } - } - ] - } -} -drop table t1; -# -# A derived table -# -create table t1 (a int, b int); -insert into t1 select a,a from t0; -explain format=json -select * from (select a, count(*) as cnt from t1 group by a) as tbl -where cnt>0; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "", - "access_type": "ALL", - "rows": 10, - "filtered": 100, - "attached_condition": "tbl.cnt > 0", - "materialized": { - "query_block": { - "select_id": 2, - "having_condition": "cnt > 0", - "filesort": { - "sort_key": "t1.a", - "temporary_table": { - "table": { - "table_name": "t1", - "access_type": "ALL", - "rows": 10, - "filtered": 100 - } - } - } - } - } - } - } -} -explain format=json -select * from (select a, count(*) as cnt from t1 group by a) as tbl1, t1 as -tbl2 where cnt=tbl2.a; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "tbl2", - "access_type": "ALL", - "rows": 10, - "filtered": 100, - "attached_condition": "tbl2.a is not null" - }, - "table": { - "table_name": "", - "access_type": "ref", - "possible_keys": ["key0"], - "key": "key0", - "key_length": "8", - "used_key_parts": ["cnt"], - "ref": ["test.tbl2.a"], - "rows": 2, - "filtered": 100, - "attached_condition": "tbl1.cnt = tbl2.a", - "materialized": { - "query_block": { - "select_id": 2, - "filesort": { - "sort_key": "t1.a", - "temporary_table": { - "table": { - "table_name": "t1", - "access_type": "ALL", - "rows": 10, - "filtered": 100 - } - } - } - } - } - } - } -} -# -# Non-merged semi-join (aka JTBM) -# -explain format=json -select * from t1 where a in (select max(a) from t1 group by b); -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t1", - "access_type": "ALL", - "rows": 10, - "filtered": 100, - "attached_condition": "t1.a is not null" - }, - "table": { - "table_name": "", - "access_type": "eq_ref", - "possible_keys": ["distinct_key"], - "key": "distinct_key", - "key_length": "4", - "used_key_parts": ["max(a)"], - "ref": ["test.t1.a"], - "rows": 1, - "filtered": 100, - "materialized": { - "unique": 1, - "query_block": { - "select_id": 2, - "temporary_table": { - "table": { - "table_name": "t1", - "access_type": "ALL", - "rows": 10, - "filtered": 100 - } - } - } - } - } - } -} -# -# Semi-join Materialization -# -create table t2 like t1; -insert into t2 select * from t1; -explain format=json -select * from t1,t2 where t1.a in ( select a from t0); -EXPLAIN -{ - "query_block": { - "select_id": 1, - "const_condition": "1", - "table": { - "table_name": "t1", - "access_type": "ALL", - "rows": 10, - "filtered": 100 - }, - "table": { - "table_name": "", - "access_type": "eq_ref", - "possible_keys": ["distinct_key"], - "key": "distinct_key", - "key_length": "4", - "used_key_parts": ["a"], - "ref": ["func"], - "rows": 1, - "filtered": 100, - "materialized": { - "unique": 1, - "query_block": { - "select_id": 2, - "table": { - "table_name": "t0", - "access_type": "ALL", - "rows": 10, - "filtered": 100 - } - } - } - }, - "block-nl-join": { - "table": { - "table_name": "t2", - "access_type": "ALL", - "rows": 10, - "filtered": 100 - }, - "buffer_type": "flat", - "buffer_size": "256Kb", - "join_type": "BNL" - } - } -} -# -# First-Match -# -explain -select * from t2 where t2.a in ( select a from t1 where t1.b=t2.b); -id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t2 ALL NULL NULL NULL NULL 10 -1 PRIMARY t1 ALL NULL NULL NULL NULL 10 Using where; FirstMatch(t2); Using join buffer (flat, BNL join) -explain format=json -select * from t2 where t2.a in ( select a from t1 where t1.b=t2.b); -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t2", - "access_type": "ALL", - "rows": 10, - "filtered": 100 - }, - "block-nl-join": { - "table": { - "table_name": "t1", - "access_type": "ALL", - "rows": 10, - "filtered": 100, - "first_match": "t2" - }, - "buffer_type": "flat", - "buffer_size": "256Kb", - "join_type": "BNL", - "attached_condition": "t1.b = t2.b and t1.a = t2.a" - } - } -} -# -# Duplicate Weedout -# -set @tmp= @@optimizer_switch; -set optimizer_switch='firstmatch=off'; -explain -select * from t2 where t2.a in ( select a from t1 where t1.b=t2.b); -id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t2 ALL NULL NULL NULL NULL 10 -1 PRIMARY t1 ALL NULL NULL NULL NULL 10 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join) -explain format=json -select * from t2 where t2.a in ( select a from t1 where t1.b=t2.b); -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t2", - "access_type": "ALL", - "rows": 10, - "filtered": 100 - }, - "duplicates_removal": { - "block-nl-join": { - "table": { - "table_name": "t1", - "access_type": "ALL", - "rows": 10, - "filtered": 100 - }, - "buffer_type": "flat", - "buffer_size": "256Kb", - "join_type": "BNL", - "attached_condition": "t1.b = t2.b and t1.a = t2.a" - } - } - } -} -set optimizer_switch=@tmp; -drop table t1,t2; -# -# MRR for range access (no BKA, just MRR) -# -create table t1 (a int, b int, key(a)); -insert into t1 select tbl1.a+10*tbl2.a, 12345 from t0 tbl1, t0 tbl2; -set @tmp= @@optimizer_switch; -set optimizer_switch='mrr=on,mrr_sort_keys=on'; -explain format=json select * from t1 where a < 3; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t1", - "access_type": "range", - "possible_keys": ["a"], - "key": "a", - "key_length": "5", - "used_key_parts": ["a"], - "rows": 1, - "filtered": 100, - "index_condition": "t1.a < 3", - "mrr_type": "Rowid-ordered scan" - } - } -} -# 'Range checked for each record' -set optimizer_switch=@tmp; -explain format=json -select * from t1 tbl1, t1 tbl2 where tbl2.a < tbl1.b; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "tbl1", - "access_type": "ALL", - "rows": 100, - "filtered": 100 - }, - "range-checked-for-each-record": { - "keys": ["a"], - "table": { - "table_name": "tbl2", - "access_type": "ALL", - "possible_keys": ["a"], - "rows": 100, - "filtered": 100 - } - } - } -} -drop table t1; -drop table t0; -# -# MDEV-7265: "Full scan on NULL key", the join case -# -CREATE TABLE t1 (a INT, KEY(a)); -INSERT INTO t1 VALUES (1),(2); -CREATE TABLE t2 (b INT); -INSERT INTO t2 VALUES (3),(4); -EXPLAIN FORMAT=JSON SELECT * FROM t1 AS outer_t1 WHERE a <> ALL ( SELECT a FROM t1, t2 WHERE b <> outer_t1.a ); -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "outer_t1", - "access_type": "index", - "key": "a", - "key_length": "5", - "used_key_parts": ["a"], - "rows": 2, - "filtered": 100, - "attached_condition": "!(outer_t1.a,(subquery#2))", - "using_index": true - }, - "subqueries": [ - { - "query_block": { - "select_id": 2, - "having_condition": "trigcond(t1.a is null)", - "full-scan-on-null_key": { - "table": { - "table_name": "t1", - "access_type": "ref_or_null", - "possible_keys": ["a"], - "key": "a", - "key_length": "5", - "used_key_parts": ["a"], - "ref": ["func"], - "rows": 2, - "filtered": 100, - "attached_condition": "trigcond((outer_t1.a) = t1.a or t1.a is null)", - "using_index": true - } - }, - "block-nl-join": { - "table": { - "table_name": "t2", - "access_type": "ALL", - "rows": 2, - "filtered": 100 - }, - "buffer_type": "flat", - "buffer_size": "256Kb", - "join_type": "BNL", - "attached_condition": "t2.b <> outer_t1.a" - } - } - } - ] - } -} -DROP TABLE t1,t2; -# -# Join's constant expression -# -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); -insert into t1 select tbl1.a+10*tbl2.a, 1234 from t0 tbl1, t0 tbl2; -explain format=json -select * from t0 -where -20000 > all (select max(tbl1.a + tbl2.a) -from t1 tbl1, t1 tbl2 where tbl1.b=tbl2.b); -EXPLAIN -{ - "query_block": { - "select_id": 1, - "const_condition": "((20000,(subquery#2) >= 20000))", - "table": { - "table_name": "t0", - "access_type": "ALL", - "rows": 10, - "filtered": 100 - }, - "subqueries": [ - { - "query_block": { - "select_id": 2, - "table": { - "table_name": "tbl1", - "access_type": "ALL", - "rows": 100, - "filtered": 100 - }, - "block-nl-join": { - "table": { - "table_name": "tbl2", - "access_type": "ALL", - "rows": 100, - "filtered": 100 - }, - "buffer_type": "flat", - "buffer_size": "256Kb", - "join_type": "BNL", - "attached_condition": "tbl2.b = tbl1.b" - } - } - } - ] - } -} -drop table t1; -drop table t0; -# -# MDEV-7264: Assertion `0' failed in subselect_engine::get_identifier() on EXPLAIN JSON -# -CREATE TABLE t1 (a INT); -INSERT INTO t1 VALUES (1),(2); -CREATE TABLE t2 (b INT); -INSERT INTO t2 VALUES (3),(4); -EXPLAIN FORMAT=JSON SELECT * FROM t1 WHERE a <> ALL ( SELECT b FROM t2 ); -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t1", - "access_type": "ALL", - "rows": 2, - "filtered": 100, - "attached_condition": "!(t1.a,t1.a in (subquery#2))" - }, - "subqueries": [ - { - "query_block": { - "select_id": 2, - "table": { - "table_name": "t2", - "access_type": "ALL", - "rows": 2, - "filtered": 100 - } - } - } - ] - } -} -DROP TABLE t1, t2; -# -# MDEV-7927: Server crashes in in Time_and_counter_tracker::incr_loops -# -CREATE TABLE t1 (i INT); -INSERT INTO t1 VALUES (1),(2); -EXPLAIN SELECT * FROM t1 WHERE 3 IN ( SELECT 4 UNION SELECT 5 ); -id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE -2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used -3 UNION NULL NULL NULL NULL NULL NULL NULL No tables used -NULL UNION RESULT ALL NULL NULL NULL NULL NULL -DROP TABLE t1; -# -# MDEV-7860: EXPLAIN FORMAT=JSON crashes for loose scan query -# -create table t2(a int); -insert into t2 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); -create table t1 (a int, b int, c int, d int, key(a,b,c)); -insert into t1 select A.a, B.a, C.a, D.a from t2 A, t2 B, t2 C, t2 D; -explain select count(distinct b) from t1 group by a; -id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 range NULL a 10 NULL 101 Using index for group-by -explain format=json select count(distinct b) from t1 group by a; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t1", - "access_type": "range", - "key": "a", - "key_length": "10", - "used_key_parts": ["a", "b"], - "rows": 101, - "filtered": 100, - "using_index_for_group_by": true - } - } -} -analyze format=json select count(distinct b) from t1 group by a; -ANALYZE -{ - "query_block": { - "select_id": 1, - "r_loops": 1, - "r_total_time_ms": "REPLACED", - "table": { - "table_name": "t1", - "access_type": "range", - "key": "a", - "key_length": "10", - "used_key_parts": ["a", "b"], - "r_loops": 1, - "rows": 101, - "r_rows": 100, - "r_total_time_ms": "REPLACED", - "filtered": 100, - "r_filtered": 100, - "using_index_for_group_by": true - } - } -} -drop table t1,t2; -# -# Try both variants of LooseScan (data/queries borrowed from group_min_max.test) -# -create table t1 ( -a1 char(64), a2 char(64), b char(16), c char(16) not null, d char(16), dummy char(248) default ' ' -); -insert into t1 (a1, a2, b, c, d) values -('a','a','a','a111','xy1'),('a','a','a','b111','xy2'),('a','a','a','c111','xy3'),('a','a','a','d111','xy4'), -('a','a','b','e112','xy1'),('a','a','b','f112','xy2'),('a','a','b','g112','xy3'),('a','a','b','h112','xy4'), -('a','b','a','i121','xy1'),('a','b','a','j121','xy2'),('a','b','a','k121','xy3'),('a','b','a','l121','xy4'), -('a','b','b','m122','xy1'),('a','b','b','n122','xy2'),('a','b','b','o122','xy3'),('a','b','b','p122','xy4'), -('b','a','a','a211','xy1'),('b','a','a','b211','xy2'),('b','a','a','c211','xy3'),('b','a','a','d211','xy4'), -('b','a','b','e212','xy1'),('b','a','b','f212','xy2'),('b','a','b','g212','xy3'),('b','a','b','h212','xy4'), -('b','b','a','i221','xy1'),('b','b','a','j221','xy2'),('b','b','a','k221','xy3'),('b','b','a','l221','xy4'), -('b','b','b','m222','xy1'),('b','b','b','n222','xy2'),('b','b','b','o222','xy3'),('b','b','b','p222','xy4'), -('c','a','a','a311','xy1'),('c','a','a','b311','xy2'),('c','a','a','c311','xy3'),('c','a','a','d311','xy4'), -('c','a','b','e312','xy1'),('c','a','b','f312','xy2'),('c','a','b','g312','xy3'),('c','a','b','h312','xy4'), -('c','b','a','i321','xy1'),('c','b','a','j321','xy2'),('c','b','a','k321','xy3'),('c','b','a','l321','xy4'), -('c','b','b','m322','xy1'),('c','b','b','n322','xy2'),('c','b','b','o322','xy3'),('c','b','b','p322','xy4'), -('d','a','a','a411','xy1'),('d','a','a','b411','xy2'),('d','a','a','c411','xy3'),('d','a','a','d411','xy4'), -('d','a','b','e412','xy1'),('d','a','b','f412','xy2'),('d','a','b','g412','xy3'),('d','a','b','h412','xy4'), -('d','b','a','i421','xy1'),('d','b','a','j421','xy2'),('d','b','a','k421','xy3'),('d','b','a','l421','xy4'), -('d','b','b','m422','xy1'),('d','b','b','n422','xy2'),('d','b','b','o422','xy3'),('d','b','b','p422','xy4'), -('a','a','a','a111','xy1'),('a','a','a','b111','xy2'),('a','a','a','c111','xy3'),('a','a','a','d111','xy4'), -('a','a','b','e112','xy1'),('a','a','b','f112','xy2'),('a','a','b','g112','xy3'),('a','a','b','h112','xy4'), -('a','b','a','i121','xy1'),('a','b','a','j121','xy2'),('a','b','a','k121','xy3'),('a','b','a','l121','xy4'), -('a','b','b','m122','xy1'),('a','b','b','n122','xy2'),('a','b','b','o122','xy3'),('a','b','b','p122','xy4'), -('b','a','a','a211','xy1'),('b','a','a','b211','xy2'),('b','a','a','c211','xy3'),('b','a','a','d211','xy4'), -('b','a','b','e212','xy1'),('b','a','b','f212','xy2'),('b','a','b','g212','xy3'),('b','a','b','h212','xy4'), -('b','b','a','i221','xy1'),('b','b','a','j221','xy2'),('b','b','a','k221','xy3'),('b','b','a','l221','xy4'), -('b','b','b','m222','xy1'),('b','b','b','n222','xy2'),('b','b','b','o222','xy3'),('b','b','b','p222','xy4'), -('c','a','a','a311','xy1'),('c','a','a','b311','xy2'),('c','a','a','c311','xy3'),('c','a','a','d311','xy4'), -('c','a','b','e312','xy1'),('c','a','b','f312','xy2'),('c','a','b','g312','xy3'),('c','a','b','h312','xy4'), -('c','b','a','i321','xy1'),('c','b','a','j321','xy2'),('c','b','a','k321','xy3'),('c','b','a','l321','xy4'), -('c','b','b','m322','xy1'),('c','b','b','n322','xy2'),('c','b','b','o322','xy3'),('c','b','b','p322','xy4'), -('d','a','a','a411','xy1'),('d','a','a','b411','xy2'),('d','a','a','c411','xy3'),('d','a','a','d411','xy4'), -('d','a','b','e412','xy1'),('d','a','b','f412','xy2'),('d','a','b','g412','xy3'),('d','a','b','h412','xy4'), -('d','b','a','i421','xy1'),('d','b','a','j421','xy2'),('d','b','a','k421','xy3'),('d','b','a','l421','xy4'), -('d','b','b','m422','xy1'),('d','b','b','n422','xy2'),('d','b','b','o422','xy3'),('d','b','b','p422','xy4'); -create index idx_t1_0 on t1 (a1); -create index idx_t1_1 on t1 (a1,a2,b,c); -create index idx_t1_2 on t1 (a1,a2,b); -analyze table t1; -Table Op Msg_type Msg_text -test.t1 analyze status Table is already up to date -explain select count(distinct a1,a2,b) from t1 where (a2 >= 'b') and (b = 'a'); -id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 range NULL idx_t1_1 147 NULL 17 Using where; Using index for group-by -explain select count(distinct a1,a2,b,c) from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121'); -id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 range NULL idx_t1_1 163 NULL 65 Using where; Using index for group-by (scanning) -explain format=json select count(distinct a1,a2,b) from t1 where (a2 >= 'b') and (b = 'a'); -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t1", - "access_type": "range", - "key": "idx_t1_1", - "key_length": "147", - "used_key_parts": ["a1", "a2", "b"], - "rows": 17, - "filtered": 100, - "attached_condition": "t1.b = 'a' and t1.a2 >= 'b'", - "using_index_for_group_by": true - } - } -} -explain format=json select count(distinct a1,a2,b,c) from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121'); -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t1", - "access_type": "range", - "key": "idx_t1_1", - "key_length": "163", - "used_key_parts": ["a1", "a2", "b", "c"], - "rows": 65, - "filtered": 100, - "attached_condition": "t1.b = 'a' and t1.c = 'i121' and t1.a2 >= 'b'", - "using_index_for_group_by": "scanning" - } - } -} -drop table t1; -# -# MDEV-8786 Wrong result for SELECT FORMAT=JSON * FROM t1 WHERE a=_latin1 0xDF -# -CREATE TABLE t1 (a VARCHAR(10) CHARACTER SET latin1); -INSERT INTO t1 VALUES ('a'),('b'); -EXPLAIN FORMAT=JSON SELECT * FROM t1 WHERE a=_latin1 0xDF; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t1", - "access_type": "ALL", - "rows": 2, - "filtered": 100, - "attached_condition": "t1.a = _latin1'\xDF'" - } - } -} -DROP TABLE t1; -# -# MDEV-8785 Wrong results for EXPLAIN EXTENDED...WHERE NULLIF(latin1_col, _utf8'a' COLLATE utf8_bin) IS NOT NULL -# -CREATE TABLE t1 (a VARCHAR(10) CHARACTER SET latin1); -INSERT INTO t1 VALUES ('a'),('A'); -EXPLAIN FORMAT=JSON SELECT * FROM t1 WHERE NULLIF(a,_utf8'a' COLLATE utf8_bin); -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t1", - "access_type": "ALL", - "rows": 2, - "filtered": 100, - "attached_condition": "(case when convert(t1.a using utf8) = (_utf8'a' collate utf8_bin) then NULL else t1.a end)" - } - } -} -DROP TABLE t1; -# -# MDEV-7970: EXPLAIN FORMAT=JSON does not print HAVING -# -create table t0(a int); -insert into t0 values (0),(1),(2),(3); -create table t1(a int); -insert into t1 select A.a + B.a* 10 + C.a * 100 from t0 A, t0 B, t0 C; -create table t2 ( -a int, -b int, -key (a) -); -insert into t2 select A.a*1000 + B.a, A.a*1000 + B.a from t0 A, t1 B; -# normal HAVING -explain format=json select a, max(b) as TOP from t2 group by a having TOP > a; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "having_condition": "TOP > t2.a", - "filesort": { - "sort_key": "t2.a", - "temporary_table": { - "table": { - "table_name": "t2", - "access_type": "ALL", - "rows": 256, - "filtered": 100 - } - } - } - } -} -# HAVING is always TRUE (not printed) -explain format=json select a, max(b) as TOP from t2 group by a having 1<>2; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "filesort": { - "sort_key": "t2.a", - "temporary_table": { - "table": { - "table_name": "t2", - "access_type": "ALL", - "rows": 256, - "filtered": 100 - } - } - } - } -} -# HAVING is always FALSE (intercepted by message) -explain format=json select a, max(b) as TOP from t2 group by a having 1=2; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "message": "Impossible HAVING" - } - } -} -# HAVING is absent -explain format=json select a, max(b) as TOP from t2 group by a; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "filesort": { - "sort_key": "t2.a", - "temporary_table": { - "table": { - "table_name": "t2", - "access_type": "ALL", - "rows": 256, - "filtered": 100 - } - } - } - } -} -drop table t0, t1, t2; -# -# MDEV-8829: Assertion `0' failed in Explain_table_access::tag_to_json -# -# Check ET_CONST_ROW_NOT_FOUND -create table t1 (i int) engine=myisam; -explain -select * from t1; -id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 system NULL NULL NULL NULL 0 Const row not found -explain format=json -select * from t1; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t1", - "access_type": "system", - "rows": 0, - "filtered": 0, - "const_row_not_found": true - } - } -} -analyze format=json -select * from t1; -ANALYZE -{ - "query_block": { - "select_id": 1, - "table": { - "message": "no matching row in const table" - } - } -} -drop table t1; -# Check ET_IMPOSSIBLE_ON_CONDITION -create table t1 (a int); -create table t2 (pk int primary key); -insert into t1 values (1),(2); -insert into t2 values (1),(2); -explain -select * from t1 left join t2 on t2.pk > 10 and t2.pk < 0; -id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 const PRIMARY NULL NULL NULL 1 Impossible ON condition -1 SIMPLE t1 ALL NULL NULL NULL NULL 2 -explain format=json -select * from t1 left join t2 on t2.pk > 10 and t2.pk < 0; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "const_condition": "1", - "table": { - "table_name": "t2", - "access_type": "const", - "possible_keys": ["PRIMARY"], - "rows": 1, - "filtered": 100, - "impossible_on_condition": true - }, - "table": { - "table_name": "t1", - "access_type": "ALL", - "rows": 2, - "filtered": 100 - } - } -} -analyze format=json -select * from t1 left join t2 on t2.pk > 10 and t2.pk < 0; -ANALYZE -{ - "query_block": { - "select_id": 1, - "r_loops": 1, - "r_total_time_ms": "REPLACED", - "const_condition": "1", - "table": { - "table_name": "t2", - "access_type": "const", - "possible_keys": ["PRIMARY"], - "r_loops": 0, - "rows": 1, - "r_rows": null, - "filtered": 100, - "r_filtered": null, - "impossible_on_condition": true - }, - "table": { - "table_name": "t1", - "access_type": "ALL", - "r_loops": 1, - "rows": 2, - "r_rows": 2, - "r_total_time_ms": "REPLACED", - "filtered": 100, - "r_filtered": 100 - } - } -} -# Check ET_NOT_EXISTS: -explain -select * from t1 left join t2 on t2.pk=t1.a where t2.pk is null; -id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 2 -1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where; Using index; Not exists -explain format=json -select * from t1 left join t2 on t2.pk=t1.a where t2.pk is null; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t1", - "access_type": "ALL", - "rows": 2, - "filtered": 100 - }, - "table": { - "table_name": "t2", - "access_type": "eq_ref", - "possible_keys": ["PRIMARY"], - "key": "PRIMARY", - "key_length": "4", - "used_key_parts": ["pk"], - "ref": ["test.t1.a"], - "rows": 1, - "filtered": 100, - "attached_condition": "trigcond(t2.pk is null) and trigcond(trigcond(t1.a is not null))", - "using_index": true, - "not_exists": true - } - } -} -analyze format=json -select * from t1 left join t2 on t2.pk=t1.a where t2.pk is null; -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": 2, - "r_rows": 2, - "r_total_time_ms": "REPLACED", - "filtered": 100, - "r_filtered": 100 - }, - "table": { - "table_name": "t2", - "access_type": "eq_ref", - "possible_keys": ["PRIMARY"], - "key": "PRIMARY", - "key_length": "4", - "used_key_parts": ["pk"], - "ref": ["test.t1.a"], - "r_loops": 2, - "rows": 1, - "r_rows": 1, - "r_total_time_ms": "REPLACED", - "filtered": 100, - "r_filtered": 100, - "attached_condition": "trigcond(t2.pk is null) and trigcond(trigcond(t1.a is not null))", - "using_index": true, - "not_exists": true - } - } -} -# Check ET_DISTINCT -explain -select distinct t1.a from t1 join t2 on t2.pk=t1.a; -id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where; Using temporary -1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index; Distinct -explain format=json -select distinct t1.a from t1 join t2 on t2.pk=t1.a; -EXPLAIN -{ - "query_block": { - "select_id": 1, - "temporary_table": { - "table": { - "table_name": "t1", - "access_type": "ALL", - "rows": 2, - "filtered": 100, - "attached_condition": "t1.a is not null" - }, - "table": { - "table_name": "t2", - "access_type": "eq_ref", - "possible_keys": ["PRIMARY"], - "key": "PRIMARY", - "key_length": "4", - "used_key_parts": ["pk"], - "ref": ["test.t1.a"], - "rows": 1, - "filtered": 100, - "using_index": true, - "distinct": true - } - } - } -} -analyze format=json -select distinct t1.a from t1 join t2 on t2.pk=t1.a; -ANALYZE -{ - "query_block": { - "select_id": 1, - "r_loops": 1, - "r_total_time_ms": "REPLACED", - "temporary_table": { - "table": { - "table_name": "t1", - "access_type": "ALL", - "r_loops": 1, - "rows": 2, - "r_rows": 2, - "r_total_time_ms": "REPLACED", - "filtered": 100, - "r_filtered": 100, - "attached_condition": "t1.a is not null" - }, - "table": { - "table_name": "t2", - "access_type": "eq_ref", - "possible_keys": ["PRIMARY"], - "key": "PRIMARY", - "key_length": "4", - "used_key_parts": ["pk"], - "ref": ["test.t1.a"], - "r_loops": 2, - "rows": 1, - "r_rows": 1, - "r_total_time_ms": "REPLACED", - "filtered": 100, - "r_filtered": 100, - "using_index": true, - "distinct": true - } - } - } -} -drop table t1,t2; -# Check ET_USING_INDEX_CONDITION_BKA -create table t1(a int); -insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); -create table t2(a int); -insert into t2 select A.a + B.a* 10 + C.a * 100 from t1 A, t1 B, t1 C; -create table t3(a int, b int); -insert into t3 select a,a from t1; -create table t4(a int, b int, c int, filler char(100), key (a,b)); -insert into t4 select a,a,a, 'filler-data' from t2; -set @tmp_optimizer_switch=@@optimizer_switch; -set @tmp_join_cache_level=@@join_cache_level; -set optimizer_switch='mrr=on'; -set join_cache_level=6; -explain -select * from t3,t4 where t3.a=t4.a and (t4.b+1 <= t3.b+1); -id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t3 ALL NULL NULL NULL NULL 10 Using where -1 SIMPLE t4 ref a a 5 test.t3.a 1 Using index condition(BKA); Using join buffer (flat, BKA join); Rowid-ordered scan -explain format=json -select * from t3,t4 where t3.a=t4.a and (t4.b+1 <= t3.b+1); -EXPLAIN -{ - "query_block": { - "select_id": 1, - "table": { - "table_name": "t3", - "access_type": "ALL", - "rows": 10, - "filtered": 100, - "attached_condition": "t3.a is not null" - }, - "block-nl-join": { - "table": { - "table_name": "t4", - "access_type": "ref", - "possible_keys": ["a"], - "key": "a", - "key_length": "5", - "used_key_parts": ["a"], - "ref": ["test.t3.a"], - "rows": 1, - "filtered": 100, - "index_condition_bka": "t4.b + 1 <= t3.b + 1" - }, - "buffer_type": "flat", - "buffer_size": "256Kb", - "join_type": "BKA", - "mrr_type": "Rowid-ordered scan" - } - } -} -analyze format=json -select * from t3,t4 where t3.a=t4.a and (t4.b+1 <= t3.b+1); -ANALYZE -{ - "query_block": { - "select_id": 1, - "r_loops": 1, - "r_total_time_ms": "REPLACED", - "table": { - "table_name": "t3", - "access_type": "ALL", - "r_loops": 1, - "rows": 10, - "r_rows": 10, - "r_total_time_ms": "REPLACED", - "filtered": 100, - "r_filtered": 100, - "attached_condition": "t3.a is not null" - }, - "block-nl-join": { - "table": { - "table_name": "t4", - "access_type": "ref", - "possible_keys": ["a"], - "key": "a", - "key_length": "5", - "used_key_parts": ["a"], - "ref": ["test.t3.a"], - "r_loops": 1, - "rows": 1, - "r_rows": 10, - "r_total_time_ms": "REPLACED", - "filtered": 100, - "r_filtered": 100, - "index_condition_bka": "t4.b + 1 <= t3.b + 1" - }, - "buffer_type": "flat", - "buffer_size": "256Kb", - "join_type": "BKA", - "mrr_type": "Rowid-ordered scan", - "r_filtered": 100 - } - } -} -set optimizer_switch=@tmp_optimizer_switch; -set join_cache_level=@tmp_join_cache_level; -drop table t1,t2,t3,t4; -# -# MDEV-9652: EXPLAIN FORMAT=JSON should show outer_ref_cond -# -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); -insert into t1 select a,a from t0; -explain format=json -select a, (select max(a) from t1 where t0.a<5 and t1.b