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--source include/not_embedded.inc --source include/not_crashrep.inc --source include/have_debug.inc --source include/have_innodb.inc --source include/have_innodb_16k.inc --echo # --echo # Bug #16963396 INNODB: USE OF LARGE EXTERNALLY-STORED FIELDS MAKES --echo # CRASH RECOVERY LOSE DATA --echo # # .......................................................................... --echo # --echo # Uncompressed Table - UPDATE Operation - Crash Test --echo # Update that moves non-updated column to blob --echo # create table t2 (f1 bigint primary key, f2 longblob, f3 longblob, index(f2(10), f3(10))) engine=innodb; insert into t2 values (1, repeat('%', 7000), repeat('+', 30)); select f1, length(f2), length(f3) from t2; --echo # Connection con1: connect (con1,localhost,root,,); set debug_sync='ib_mv_nonupdated_column_offpage SIGNAL s1 WAIT_FOR go_update'; # The BLOB update will fail, and should disappear. However no data committed # up to this point should be lost. begin; --send update t2 set f3 = repeat('[', 3000); --echo # Connection default: connection default; set debug_sync='now WAIT_FOR s1'; set debug_sync='now SIGNAL go_update'; --echo # Connection con1: connection con1; --echo # reap: update t2 set f3 = repeat('[', 3000); --reap --echo # Connection default: connection default; --source include/kill_and_restart_mysqld.inc select f1, length(f2), length(f3) from t2; select f1, right(f2, 40), right(f3, 40) from t2; check table t2; # .......................................................................... --echo # --echo # Compressed Table - Update Operation --echo # update that moves a non-updated column to BLOB --echo # set global innodb_compression_level = 0; create table t3 (f1 bigint primary key, f2 longblob, f3 longblob, index(f2(10), f3(10))) engine=innodb row_format=compressed; insert into t3 values (1, repeat('%', 7000), repeat('+', 30)); select f1, length(f2), length(f3) from t3; --echo # Connection con2: connect (con2,localhost,root,,); set debug_sync='ib_mv_nonupdated_column_offpage SIGNAL s1 WAIT_FOR go_upd'; # The BLOB update will fail, and should disappear. However no data committed # up to this point should be lost. begin; --send update t3 set f3 = repeat('[', 3000) where f1 = 1; --echo # Connection default: connection default; set debug_sync='now WAIT_FOR s1'; set debug_sync='now SIGNAL go_upd'; --echo # Connection con2: connection con2; --echo # reap: update t3 set f3 = repeat('[', 3000) where f1 = 1; --reap --echo # Connection default: connection default; --source include/kill_and_restart_mysqld.inc select f1, length(f2), length(f3) from t3; select f1, right(f2, 30), right(f3, 20) from t3; check table t3; # Clean up. DROP TABLE t2, t3;