--source include/have_debug.inc
--source include/have_innodb_max_16k.inc

SET @orig_log_error_verbosity= @@GLOBAL.log_error_verbosity;
SET GLOBAL log_error_verbosity=3;

set global innodb_compression_level = 0;
set debug = '+d,lob_print_partial_update_hit';

CREATE TABLE t(j1 JSON);

set @data_1 = repeat('abcdefghijklmnopqrstuvwxyz1234', 6006);
set @json_doc_1 = concat('["Sven", "', @data_1, '"]');

INSERT INTO t VALUES (@json_doc_1);

start transaction;
--echo # Sven
select json_extract(j1, '$[0]') from t;
UPDATE t SET j1 = JSON_SET(j1, '$[0]', 'Knut');
--echo # Knut
select json_extract(j1, '$[0]') from t;
savepoint a;
UPDATE t SET j1 = JSON_SET(j1, '$[0]', 'Anna');
--echo # Anna
select json_extract(j1, '$[0]') from t;

rollback to a;
--echo # Knut
select json_extract(j1, '$[0]') from t;

commit;
--echo # Knut
select json_extract(j1, '$[0]') from t;

let SEARCH_FILE= $MYSQLTEST_VARDIR/log/mysqld.1.err;
let SEARCH_PATTERN= LOB partial update of field=\\(j1\\) on index=\\(\\`GEN_CLUST_INDEX\\`\\) in table=\\(test/t\\);
--source include/search_pattern.inc

drop table t;
set debug = '-d,lob_print_partial_update_hit';

set debug = '+d,zlob_print_partial_update_hit';

CREATE TABLE t2(j1 JSON) row_format=compressed;

INSERT INTO t2 VALUES (@json_doc_1);

start transaction;
--echo # Sven
select json_extract(j1, '$[0]') from t2;
UPDATE t2 SET j1 = JSON_SET(j1, '$[0]', 'Knut');
--echo # Knut
select json_extract(j1, '$[0]') from t2;
savepoint a;
UPDATE t2 SET j1 = JSON_SET(j1, '$[0]', 'Anna');
--echo # Anna
select json_extract(j1, '$[0]') from t2;

rollback to a;
--echo # Knut
select json_extract(j1, '$[0]') from t2;

commit;
--echo # Knut
select json_extract(j1, '$[0]') from t2;

let SEARCH_FILE= $MYSQLTEST_VARDIR/log/mysqld.1.err;
let SEARCH_PATTERN= ZLOB partial update of field=\\(j1\\) on index=\\(\\`GEN_CLUST_INDEX\\`\\) in table=\\(test/t2\\);
--source include/search_pattern.inc

drop table t2;
set debug = '-d,zlob_print_partial_update_hit';
set global innodb_compression_level = default;
SET GLOBAL log_error_verbosity= @orig_log_error_verbosity;