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

--echo #
--echo # Bug #27624990 ASSERTION `FALSE' FAILED AT BOOL WRAPPER_TO_STRING() IN SQL/JSON_DOM.CC
--echo #

--echo #
--echo # Scenario 1: The row format is DYNAMIC (no blob prefix).  The READ
--echo # UNCOMMITTED transaction will see the new value of column f1 but
--echo # old value of column f2.
--echo #

create table t1 (f1 int, f2 longblob) row_format=dynamic;
show create table t1;
insert into t1 values (1, repeat('x', 40000));

SET DEBUG_SYNC = 'blob_write_middle SIGNAL do_select WAIT_FOR continue_insert';
--send update t1 set f1 = 2, f2 = repeat('y', 100000) where f1 = 1;

connect (con1,localhost,root,,);
SET DEBUG_SYNC = 'now WAIT_FOR do_select';
SET SESSION transaction_isolation = 'READ-UNCOMMITTED';
begin;
select f1, f2 from t1;
commit;
SET DEBUG_SYNC = 'now SIGNAL continue_insert';

connection default;
--reap
disconnect con1;

drop table t1;

--source include/wait_until_count_sessions.inc

--echo #
--echo # Scenario 2: The row format is REDUNDANT (no blob prefix).  The READ
--echo # UNCOMMITTED transaction will see only the local prefix of f2.
--echo #

create table t1 (f1 int primary key, f2 longblob) row_format=redundant;
show create table t1;
insert into t1 values (1, repeat('x', 40000));

SET DEBUG_SYNC = 'blob_write_middle SIGNAL do_select WAIT_FOR continue_insert EXECUTE 2';
--send update t1 set f2 = repeat('y', 100000) where f1 = 1;

connect (con1,localhost,root,,);
SET DEBUG_SYNC = 'now WAIT_FOR do_select';
SET DEBUG_SYNC = 'now SIGNAL continue_insert';
SET DEBUG_SYNC = 'now WAIT_FOR do_select';
SET SESSION transaction_isolation = 'READ-UNCOMMITTED';
begin;
select length(f2) from t1 where f1 = 1;
commit;
SET DEBUG_SYNC = 'now SIGNAL continue_insert';

connection default;
--reap
disconnect con1;

drop table t1;

--source include/wait_until_count_sessions.inc

--echo #
--echo # Scenario 3: The row format is REDUNDANT (no blob prefix).  The READ
--echo # UNCOMMITTED transaction will see the local prefix of new blob and
--echo # the external part of the old blob.
--echo #

create table t1 (f1 int primary key, f2 longblob) row_format=redundant;
show create table t1;
insert into t1 values (1, repeat('x', 40000));

SET DEBUG_SYNC = 'blob_write_middle SIGNAL do_select WAIT_FOR continue_insert';
--send update t1 set f2 = repeat('y', 100000) where f1 = 1;

connect (con1,localhost,root,,);
SET DEBUG_SYNC = 'now WAIT_FOR do_select';
SET SESSION transaction_isolation = 'READ-UNCOMMITTED';
begin;
select f2 from t1 where f1 = 1;
commit;
SET DEBUG_SYNC = 'now SIGNAL continue_insert';

connection default;
--reap
disconnect con1;

drop table t1;

--source include/wait_until_count_sessions.inc

--echo #
--echo # Scenario 4: The row format is REDUNDANT (no blob prefix).
--echo # The READ UNCOMMITTED transaction will see the local prefix
--echo # of new blob and external part of old blob.  It is different
--echo # from Scenario 3 because this involves blob operation code
--echo # OPCODE_INSERT_UPDATE.
--echo #

create table t1 (f1 int primary key, f2 longblob) row_format=redundant;
show create table t1;
start transaction;
insert into t1 values (1, repeat('x', 40000));
delete from t1 where f1 = 1;

SET DEBUG_SYNC = 'blob_write_middle SIGNAL do_select WAIT_FOR continue_insert';
--send insert into t1 values (1, repeat('y', 40000));

connect (con1,localhost,root,,);
SET DEBUG_SYNC = 'now WAIT_FOR do_select';
SET SESSION transaction_isolation = 'READ-UNCOMMITTED';
begin;
select f2 from t1 where f1 = 1;
commit;
SET DEBUG_SYNC = 'now SIGNAL continue_insert';

connection default;
--reap
commit;
disconnect con1;

drop table t1;

--source include/wait_until_count_sessions.inc