MDEV-31407: Add aliases in opt_trace.test for long column name for removing...

MDEV-31407: Add aliases in opt_trace.test for long column name for removing "--disable-view-protocol"

Change tests:
	opt_trace.test
	opt_trace_index_merge.test
	opt_trace_ucs2.test

mysql-test/main/opt_trace.result

@@ -7452,8 +7452,8 @@ set optimizer_trace='enabled=on';
 explain select * from t1 force index (a_b) where a=2 and b=4;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	ref	a_b	a_b	10	const,const	1	Using index
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     {
         "range_scan_alternatives": 
@@ -7481,8 +7481,8 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
 explain select * from t1 where a >= 900 and b between 10 and 20;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	range	a_b	a_b	10	NULL	107	Using where; Using index
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     {
         "range_scan_alternatives": 
@@ -7513,8 +7513,8 @@ insert into t1 select date_add(now(), interval a day), date_add(now(), interval
 explain select * from t1 force index(start_date) where start_date >= '2019-02-10' and end_date <'2019-04-01';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	range	start_date	start_date	8	NULL	1000	Using index condition
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     {
         "range_scan_alternatives": 
@@ -7553,8 +7553,8 @@ insert into t1 select a,a, a,a from ten;
 explain select * from t1 force index(a_b_c) where a between 1 and 4 and b < 50;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	range	a_b_c	a_b_c	8	NULL	4	Using index condition
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     {
         "range_scan_alternatives": 
@@ -7587,8 +7587,8 @@ INSERT INTO t1 VALUES (2, NULL);
 EXPLAIN SELECT * FROM t1 WHERE b IN (0xD95B94336A9946A39CF5B58CFE772D8C);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	ref	i_b	i_b	17	const	1	Using index condition
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     {
         "range_scan_alternatives": 
@@ -7616,8 +7616,8 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
 EXPLAIN SELECT * FROM t1 WHERE b IS NULL;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	ref	i_b	i_b	17	const	1	Using index condition
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     {
         "range_scan_alternatives": 
@@ -7653,8 +7653,8 @@ set optimizer_trace=1;
 EXPLAIN SELECT * FROM t1 WHERE b='ab\n';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	ref	i_b	i_b	13	const	1	Using index condition
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     {
         "range_scan_alternatives": 
@@ -7683,8 +7683,8 @@ ALTER TABLE t1 modify column b BINARY(10) AFTER i;
 EXPLAIN SELECT * FROM t1 WHERE b='ab\n';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	ref	i_b	i_b	11	const	1	Using index condition
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     {
         "range_scan_alternatives": 
@@ -7713,8 +7713,8 @@ ALTER TABLE t1 modify column b VARBINARY(10) AFTER i;
 EXPLAIN SELECT * FROM t1 WHERE b='ab\n';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	ref	i_b	i_b	13	const	1	Using index condition
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     {
         "range_scan_alternatives": 
@@ -7746,8 +7746,8 @@ INSERT INTO t1 VALUES (2, NULL);
 EXPLAIN SELECT * FROM t1 WHERE b='ab\n';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	ref	i_b	i_b	11	const	1	Using index condition
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     {
         "range_scan_alternatives": 
@@ -7782,8 +7782,8 @@ set optimizer_trace=1;
 EXPLAIN SELECT * FROM t1 WHERE b= 'ab\n';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	ref	i_b	i_b	1003	const	1	Using where
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     {
         "range_scan_alternatives": 
@@ -7816,8 +7816,8 @@ set optimizer_trace=1;
 EXPLAIN SELECT * FROM t1 WHERE b='ab\n';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	ref	i_b	i_b	13	const	2	Using index condition
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     {
         "range_scan_alternatives": 
@@ -7867,8 +7867,8 @@ EXPLAIN
     }
   }
 }
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     {
         "range_scan_alternatives": 
@@ -7926,8 +7926,8 @@ explain select * from t0 A, one_k B where A.a<5 and B.a<800;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	A	ALL	NULL	NULL	NULL	NULL	10	Using where
 1	SIMPLE	B	ALL	NULL	NULL	NULL	NULL	1000	Using where
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     [
         {
@@ -8021,8 +8021,8 @@ explain select * from t0 A, one_k B where A.a=B.b and B.a<800;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	A	ALL	NULL	NULL	NULL	NULL	10	Using where
 1	SIMPLE	B	ref	b	b	5	test.A.a	1	Using where
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     [
         {
@@ -8131,8 +8131,8 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	ref	a	a	258	const	1	Using where
 SELECT * FROM t1 WHERE a= REPEAT('a', 0);
 a
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     {
         "range_scan_alternatives": 
@@ -8193,8 +8193,8 @@ insert into t1 values (1,1),(1,5),(5,1),(5,5);
 set optimizer_trace=1;
 select * from t1 force index(kp1) where (kp1=2 and kp2 >=4);
 kp1	kp2
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.range_scan_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.range_scan_alternatives'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.range_scan_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     [
         {
@@ -8224,8 +8224,8 @@ EXPLAIN SELECT * FROM t1, t2 WHERE t1.a=t2.a ORDER BY t2.b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	ALL	a	NULL	NULL	NULL	10	Using where; Using temporary; Using filesort
 1	SIMPLE	t2	ref	a	a	5	test.t1.a	1	
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     [
         {
@@ -8379,8 +8379,8 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	100	0.22	Using where
 Warnings:
 Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where `test`.`t1`.`a` between 1 and 5 and `test`.`t1`.`b` <= 5
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.selectivity_for_columns')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.selectivity_for_columns'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.selectivity_for_columns')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     [
         {
@@ -8402,8 +8402,8 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	100	100.00	Using where
 Warnings:
 Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where `test`.`t1`.`a` <> 5
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.selectivity_for_columns')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.selectivity_for_columns'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.selectivity_for_columns')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     [
         {
@@ -8422,8 +8422,8 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	100	15.62	Using where
 Warnings:
 Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where `test`.`t1`.`b` >= 10 and `test`.`t1`.`b` < 25
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.selectivity_for_columns')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.selectivity_for_columns'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.selectivity_for_columns')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     [
         {
@@ -8444,8 +8444,8 @@ SELECT sum(b), row_number() OVER (order by b) FROM t1 WHERE a = 101;
 sum(b)	row_number() OVER (order by b)
 NULL	1
 UPDATE t1 SET b=10 WHERE a=1;
-SELECT JSON_DETAILED(JSON_EXTRACT(trace, '$**.range_scan_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.range_scan_alternatives'))
+SELECT JSON_DETAILED(JSON_EXTRACT(trace, '$**.range_scan_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     [
         {

mysql-test/main/opt_trace.test

@@ -403,13 +403,11 @@ create table t1 ( a int, b int, key a_b(a,b));
 insert into t1 select a,a from one_k;
 set optimizer_trace='enabled=on';
 
-#enable after fix MDEV-27871
---disable_view_protocol
 explain select * from t1 force index (a_b) where a=2 and b=4;
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 
 explain select * from t1 where a >= 900 and b between 10 and 20;
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 
 drop table t0,t1;
 
@@ -418,7 +416,7 @@ create table t1 (start_date date, end_date date, filler char(100), key(start_dat
 insert into t1 select date_add(now(), interval a day), date_add(now(), interval (a+7) day), 'data' from one_k;
 --enable_warnings
 explain select * from t1 force index(start_date) where start_date >= '2019-02-10' and end_date <'2019-04-01';
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 drop table t1,one_k;
 
 create table ten(a int);
@@ -433,7 +431,7 @@ create table t1 (
 
 insert into t1 select a,a, a,a from ten;
 explain select * from t1 force index(a_b_c) where a between 1 and 4 and b < 50;
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 drop table ten,t1;
 
 --echo # Ported test from MYSQL for ranges involving Binary column
@@ -443,10 +441,10 @@ INSERT INTO t1 VALUES (1, x'D95B94336A9946A39CF5B58CFE772D8C');
 INSERT INTO t1 VALUES (2, NULL);
 
 EXPLAIN SELECT * FROM t1 WHERE b IN (0xD95B94336A9946A39CF5B58CFE772D8C);
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 
 EXPLAIN SELECT * FROM t1 WHERE b IS NULL;
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 
 drop table t1;
 
@@ -459,22 +457,22 @@ INSERT INTO t1 VALUES (1, 'ab\n');
 INSERT INTO t1 VALUES (2, NULL);
 set optimizer_trace=1;
 EXPLAIN SELECT * FROM t1 WHERE b='ab\n';
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 
 ALTER TABLE t1 modify column b BINARY(10) AFTER i;
 EXPLAIN SELECT * FROM t1 WHERE b='ab\n';
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 
 ALTER TABLE t1 modify column b VARBINARY(10) AFTER i;
 EXPLAIN SELECT * FROM t1 WHERE b='ab\n';
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 drop table t1;
 
 CREATE TABLE t1(i INT PRIMARY KEY, b CHAR(10), INDEX i_b(b));
 INSERT INTO t1 VALUES (1, 'ab\n');
 INSERT INTO t1 VALUES (2, NULL);
 EXPLAIN SELECT * FROM t1 WHERE b='ab\n';
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 drop table t1;
 
 CREATE TABLE t1(i INT PRIMARY KEY, b blob , INDEX i_b(b));
@@ -482,7 +480,7 @@ INSERT INTO t1 VALUES (1, 'ab\n');
 INSERT INTO t1 VALUES (2, NULL);
 set optimizer_trace=1;
 EXPLAIN SELECT * FROM t1 WHERE b= 'ab\n';
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 drop table t1;
 
 CREATE TABLE t1(i INT PRIMARY KEY, b VARCHAR(10), INDEX i_b(b));
@@ -490,7 +488,7 @@ INSERT INTO t1 VALUES (1, 'ab\n');
 INSERT INTO t1 VALUES (2, 'ab\n');
 set optimizer_trace=1;
 EXPLAIN SELECT * FROM t1 WHERE b='ab\n';
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 drop table t1;
 create table t0(a int);
 insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
@@ -501,9 +499,8 @@ create table t1 (start_date date, end_date date, filler char(100), key(start_dat
 insert into t1 select date_add(now(), interval a day), date_add(now(), interval (a+7) day), 'data' from one_k;
 --enable_warnings
 explain format=json select * from t1 force index(start_date) where start_date >= '2019-02-10' and end_date <'2019-04-01';
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 drop table t1, t0, one_k;
---enable_view_protocol
 
 --echo #
 --echo # MDEV-19776: Assertion `to_len >= 8' failed in convert_to_printable with optimizer trace enabled
@@ -533,18 +530,15 @@ set optimizer_trace=1;
 --echo #  (cost_for_plan is the same as best_access_path.cost for single-table SELECTs
 --echo #   but for joins using condition selectivity it is not as trivial. So,
 --echo #   now we are printing it)
-#enable after fix MDEV-27871
---disable_view_protocol
 explain select * from t0 A, one_k B where A.a<5 and B.a<800;
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 
 set join_cache_level=@tmp_jcl;
 
 --echo # This shows post-join selectivity
 explain select * from t0 A, one_k B where A.a=B.b and B.a<800;
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 drop table t0, one_k;
---enable_view_protocol
 
 --echo #
 --echo # Assertion `to_len >= 8' failed in convert_to_printable
@@ -556,9 +550,7 @@ insert into t1 values ('foo'), ('bar');
 EXPLAIN SELECT * FROM t1 WHERE a= REPEAT('a', 0);
 SELECT * FROM t1 WHERE a= REPEAT('a', 0);
 #enable after fix MDEV-27871
---disable_view_protocol
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
---enable_view_protocol
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 DROP TABLE t1;
 
 --echo #
@@ -589,9 +581,7 @@ insert into t1 values (1,1),(1,5),(5,1),(5,5);
 set optimizer_trace=1;
 select * from t1 force index(kp1) where (kp1=2 and kp2 >=4);
 #enable after fix MDEV-27871
---disable_view_protocol
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.range_scan_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
---enable_view_protocol
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.range_scan_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 drop table t1;
 
 --echo #
@@ -604,12 +594,10 @@ CREATE TABLE t2(a INT, b INT, key(a));
 INSERT INTO t2 SELECT seq, seq from seq_1_to_100;
 
 #enable after fix MDEV-27871
---disable_view_protocol
 SET OPTIMIZER_TRACE=1;
 EXPLAIN SELECT * FROM t1, t2 WHERE t1.a=t2.a ORDER BY t2.b;
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 DROP TABLE t1,t2;
---enable_view_protocol
 
 --echo #
 --echo # MDEV-22665: Print ranges in the optimizer trace created for non-indexed columns when
@@ -620,15 +608,12 @@ CREATE TABLE t1(a INT, b INT);
 INSERT INTO t1 SELECT seq, seq from seq_1_to_100;
 SET optimizer_trace=1;
 ANALYZE TABLE t1 PERSISTENT FOR ALL;
-#enable after fix MDEV-27871
---disable_view_protocol
 EXPLAIN EXTENDED SELECT * from t1 WHERE a between 1 and 5 and b <= 5;
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.selectivity_for_columns')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.selectivity_for_columns')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 EXPLAIN EXTENDED SELECT * from t1 WHERE a != 5;
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.selectivity_for_columns')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.selectivity_for_columns')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 EXPLAIN EXTENDED SELECT * from t1 WHERE b >= 10 and b < 25;
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.selectivity_for_columns')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
---enable_view_protocol
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.selectivity_for_columns')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 drop table t1;
 
 --echo #
@@ -639,10 +624,7 @@ drop table t1;
 CREATE TABLE t1( a INT, b INT, PRIMARY KEY( a ) );
 SELECT sum(b), row_number() OVER (order by b) FROM t1 WHERE a = 101;
 UPDATE t1 SET b=10 WHERE a=1;
-#enable after fix MDEV-27871
---disable_view_protocol
-SELECT JSON_DETAILED(JSON_EXTRACT(trace, '$**.range_scan_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
---enable_view_protocol
+SELECT JSON_DETAILED(JSON_EXTRACT(trace, '$**.range_scan_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 DROP TABLE t1;
 
 set optimizer_trace='enabled=off';
@@ -784,9 +766,13 @@ select * from
                from t10 left join t11 on t11.col1=t10.col1
                group by grp_id) T on T.grp_id=t1.b;
 
-# Not sure how MDEV-27871 is related but this test uses this reason
-# all over the place:
-#enable after fix MDEV-27871
+# Enable after fix MDEV-31408
+# On the first creation of the view from information_schema.optimizer_trace
+# everything is fine, but on the second creation of the view is
+# from information_schema.optimizer_trace the result of select
+# from this view is already returned NULL.
+# That's why view-protocol is disabled here
+
 --disable_view_protocol
 
 select json_detailed(json_extract(trace, '$**.check_split_materialized')) as JS

mysql-test/main/opt_trace_index_merge.result

@@ -304,8 +304,8 @@ set optimizer_trace='enabled=on';
 explain select key1,key2,key3 from t1 where key1=100 and key2=100 and key3=100;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	index_merge	key1,key2,key3	key1,key2,key3	5,5,5	NULL	2	Using intersect(key1,key2,key3); Using where; Using index
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     {
         "range_scan_alternatives": 
@@ -398,8 +398,8 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
         []
     }
 ]
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.chosen_range_access_summary')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.chosen_range_access_summary'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.chosen_range_access_summary')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     {
         "range_access_plan": 
@@ -443,8 +443,8 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.chosen_range_access_summary'))
 explain select key1,key2,key3,key4 from t1 where key1=100 and key2=100 or key3=100 and key4=100;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	index_merge	key1,key2,key3,key4	key1,key2,key3,key4	5,5,5,5	NULL	154	Using union(intersect(key1,key2),intersect(key3,key4)); Using where
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     {
         "range_scan_alternatives": 
@@ -620,8 +620,8 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
         ]
     }
 ]
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.chosen_range_access_summary')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.chosen_range_access_summary'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.chosen_range_access_summary')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     {
         "range_access_plan": 

mysql-test/main/opt_trace_index_merge.test

@@ -119,17 +119,17 @@ insert into t1 (key1, key2, key3, key4, filler1) values (100, 100, -1, -1, 'key1
 insert into t1 (key1, key2, key3, key4, filler1) values (-1, -1, 100, 100, 'key4-key3');
 set optimizer_trace='enabled=on';
 
-#check after fix MDEV-27871
+# Enable after fix MDEV-31408
 --disable_view_protocol
 --echo #  3-way ROR-intersection
 explain select key1,key2,key3 from t1 where key1=100 and key2=100 and key3=100;
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.chosen_range_access_summary')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.chosen_range_access_summary')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 
 --echo # ROR-union(ROR-intersection, ROR-range)
 explain select key1,key2,key3,key4 from t1 where key1=100 and key2=100 or key3=100 and key4=100;
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.chosen_range_access_summary')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.chosen_range_access_summary')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 --enable_view_protocol
 
 drop table t0,t1;

mysql-test/main/opt_trace_ucs2.result

@@ -20,8 +20,8 @@ EXPLAIN
     }
   }
 }
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
-JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
+JS
 [
     {
         "range_scan_alternatives": 

mysql-test/main/opt_trace_ucs2.test

@@ -6,8 +6,5 @@ insert into t1 values ('a', 'a');
 insert into t1 values ('a', 'a');
 set optimizer_trace=1;
 explain format=json select * from t1 force index(col1) where col1 >='a';
-#enable after fix MDEV-27871
---disable_view_protocol
-select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
---enable_view_protocol
+select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) AS JS from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
 drop table t1;