From dec24a7dd8b6ed6b2d8e92649ffb3b8df3edffdc Mon Sep 17 00:00:00 2001 From: Jimmy Yang Date: Mon, 28 Jun 2010 19:41:37 -0700 Subject: [PATCH] Check in fix for bug #53756: "ALTER TABLE ADD PRIMARY KEY affects crash recovery" rb://369 approved by Marko --- .../suite/innodb/r/innodb_bug53756.result | 118 +++++++++++ .../suite/innodb/t/innodb_bug53756.test | 184 ++++++++++++++++++ storage/innobase/dict/dict0load.c | 27 ++- 3 files changed, 315 insertions(+), 14 deletions(-) create mode 100644 mysql-test/suite/innodb/r/innodb_bug53756.result create mode 100644 mysql-test/suite/innodb/t/innodb_bug53756.test diff --git a/mysql-test/suite/innodb/r/innodb_bug53756.result b/mysql-test/suite/innodb/r/innodb_bug53756.result new file mode 100644 index 00000000000..67797f9c90f --- /dev/null +++ b/mysql-test/suite/innodb/r/innodb_bug53756.result @@ -0,0 +1,118 @@ +DROP TABLE IF EXISTS bug_53756 ; +CREATE TABLE bug_53756 (pk INT, c1 INT) ENGINE=InnoDB; +ALTER TABLE bug_53756 ADD PRIMARY KEY (pk); +INSERT INTO bug_53756 VALUES(1, 11), (2, 22), (3, 33), (4, 44); + +# Select a less restrictive isolation level. +SET GLOBAL TRANSACTION ISOLATION LEVEL READ COMMITTED; +SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED; +COMMIT; + +# Start a transaction in the default connection for isolation. +START TRANSACTION; +SELECT @@tx_isolation; +@@tx_isolation +READ-COMMITTED +SELECT * FROM bug_53756; +pk c1 +1 11 +2 22 +3 33 +4 44 + +# connection con1 deletes row 1 +START TRANSACTION; +SELECT @@tx_isolation; +@@tx_isolation +READ-COMMITTED +DELETE FROM bug_53756 WHERE pk=1; + +# connection con2 deletes row 2 +START TRANSACTION; +SELECT @@tx_isolation; +@@tx_isolation +READ-COMMITTED +DELETE FROM bug_53756 WHERE pk=2; + +# connection con3 updates row 3 +START TRANSACTION; +SELECT @@tx_isolation; +@@tx_isolation +READ-COMMITTED +UPDATE bug_53756 SET c1=77 WHERE pk=3; + +# connection con4 updates row 4 +START TRANSACTION; +SELECT @@tx_isolation; +@@tx_isolation +READ-COMMITTED +UPDATE bug_53756 SET c1=88 WHERE pk=4; + +# connection con5 inserts row 5 +START TRANSACTION; +SELECT @@tx_isolation; +@@tx_isolation +READ-COMMITTED +INSERT INTO bug_53756 VALUES(5, 55); + +# connection con6 inserts row 6 +START TRANSACTION; +SELECT @@tx_isolation; +@@tx_isolation +READ-COMMITTED +INSERT INTO bug_53756 VALUES(6, 66); + +# connection con1 commits. +COMMIT; + +# connection con3 commits. +COMMIT; + +# connection con4 rolls back. +ROLLBACK; + +# connection con6 rolls back. +ROLLBACK; + +# The connections 2 and 5 stay open. + +# connection default selects resulting data. +# Delete of row 1 was committed. +# Dpdate of row 3 was committed. +# Due to isolation level read committed, these should be included. +# All other changes should not be included. +SELECT * FROM bug_53756; +pk c1 +2 22 +3 77 +4 44 + +# connection default +# +# Crash server. +START TRANSACTION; +INSERT INTO bug_53756 VALUES (666,666); +SET SESSION debug="+d,crash_commit_before"; +COMMIT; +ERROR HY000: Lost connection to MySQL server during query + +# +# disconnect con1, con2, con3, con4, con5, con6. +# +# Restart server. + +# +# Select recovered data. +# Delete of row 1 was committed. +# Update of row 3 was committed. +# These should be included. +# All other changes should not be included. +# Delete of row 2 and insert of row 5 should be rolled back +SELECT * FROM bug_53756; +pk c1 +2 22 +3 77 +4 44 + +# Clean up. +DROP TABLE bug_53756; diff --git a/mysql-test/suite/innodb/t/innodb_bug53756.test b/mysql-test/suite/innodb/t/innodb_bug53756.test new file mode 100644 index 00000000000..85a09478486 --- /dev/null +++ b/mysql-test/suite/innodb/t/innodb_bug53756.test @@ -0,0 +1,184 @@ +# This is the test case for bug #53756. Alter table operation could +# leave a deleted record for the temp table (later renamed to the altered +# table) in the SYS_TABLES secondary index, we should ignore this row and +# find the first non-deleted row for the specified table_id when load table +# metadata in the function dict_load_table_on_id() during crash recovery. + +# +# innobackup needs to connect to the server. Not supported in embedded. +--source include/not_embedded.inc +# +# This test case needs to crash the server. Needs a debug server. +--source include/have_debug.inc +# +# Don't test this under valgrind, memory leaks will occur. +--source include/not_valgrind.inc +# +# This test case needs InnoDB. +--source include/have_innodb.inc + +# +# Precautionary clean up. +# +--disable_warnings +DROP TABLE IF EXISTS bug_53756 ; +--enable_warnings + +# +# Create test data. +# +CREATE TABLE bug_53756 (pk INT, c1 INT) ENGINE=InnoDB; +ALTER TABLE bug_53756 ADD PRIMARY KEY (pk); +INSERT INTO bug_53756 VALUES(1, 11), (2, 22), (3, 33), (4, 44); + +--echo +--echo # Select a less restrictive isolation level. +# Don't use user variables. They won't survive server crash. +--let $global_isolation= `SELECT @@global.tx_isolation`; +--let $session_isolation= `SELECT @@session.tx_isolation`; +SET GLOBAL TRANSACTION ISOLATION LEVEL READ COMMITTED; +SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED; +COMMIT; + +--echo +--echo # Start a transaction in the default connection for isolation. +START TRANSACTION; +SELECT @@tx_isolation; +SELECT * FROM bug_53756; + +--echo +--echo # connection con1 deletes row 1 +--connect (con1,localhost,root,,) +START TRANSACTION; +SELECT @@tx_isolation; +DELETE FROM bug_53756 WHERE pk=1; + +--echo +--echo # connection con2 deletes row 2 +--connect (con2,localhost,root,,) +START TRANSACTION; +SELECT @@tx_isolation; +DELETE FROM bug_53756 WHERE pk=2; + +--echo +--echo # connection con3 updates row 3 +--connect (con3,localhost,root,,) +START TRANSACTION; +SELECT @@tx_isolation; +UPDATE bug_53756 SET c1=77 WHERE pk=3; + +--echo +--echo # connection con4 updates row 4 +--connect (con4,localhost,root,,) +START TRANSACTION; +SELECT @@tx_isolation; +UPDATE bug_53756 SET c1=88 WHERE pk=4; + +--echo +--echo # connection con5 inserts row 5 +--connect (con5,localhost,root,,) +START TRANSACTION; +SELECT @@tx_isolation; +INSERT INTO bug_53756 VALUES(5, 55); + +--echo +--echo # connection con6 inserts row 6 +--connect (con6,localhost,root,,) +START TRANSACTION; +SELECT @@tx_isolation; +INSERT INTO bug_53756 VALUES(6, 66); + +--echo +--echo # connection con1 commits. +--connection con1 +COMMIT; + +--echo +--echo # connection con3 commits. +--connection con3 +COMMIT; + +--echo +--echo # connection con4 rolls back. +--connection con4 +ROLLBACK; + +--echo +--echo # connection con6 rolls back. +--connection con6 +ROLLBACK; + +--echo +--echo # The connections 2 and 5 stay open. + +--echo +--echo # connection default selects resulting data. +--echo # Delete of row 1 was committed. +--echo # Dpdate of row 3 was committed. +--echo # Due to isolation level read committed, these should be included. +--echo # All other changes should not be included. +--connection default +SELECT * FROM bug_53756; + +--echo +--echo # connection default +--connection default +--echo # +--echo # Crash server. +# +# Write file to make mysql-test-run.pl expect the "crash", but don't start +# it until it's told to +--exec echo "wait" > $MYSQLTEST_VARDIR/tmp/mysqld.1.expect +# +START TRANSACTION; +INSERT INTO bug_53756 VALUES (666,666); +# +# Request a crash on next execution of commit. +SET SESSION debug="+d,crash_commit_before"; +# +# Execute the statement that causes the crash. +--error 2013 +COMMIT; +--echo +--echo # +--echo # disconnect con1, con2, con3, con4, con5, con6. +--disconnect con1 +--disconnect con2 +--disconnect con3 +--disconnect con4 +--disconnect con5 +--disconnect con6 +--echo # +--echo # Restart server. +# +# Write file to make mysql-test-run.pl start up the server again +--exec echo "restart" > $MYSQLTEST_VARDIR/tmp/mysqld.1.expect +# +# Turn on reconnect +--enable_reconnect +# +# Call script that will poll the server waiting for it to be back online again +--source include/wait_until_connected_again.inc +# +# Turn off reconnect again +--disable_reconnect +--echo + +--echo # +--echo # Select recovered data. +--echo # Delete of row 1 was committed. +--echo # Update of row 3 was committed. +--echo # These should be included. +--echo # All other changes should not be included. +--echo # Delete of row 2 and insert of row 5 should be rolled back +SELECT * FROM bug_53756; + +--echo +--echo # Clean up. +DROP TABLE bug_53756; + +--disable_query_log +eval SET GLOBAL tx_isolation= '$global_isolation'; +eval SET SESSION tx_isolation= '$session_isolation'; +--enable_query_log + diff --git a/storage/innobase/dict/dict0load.c b/storage/innobase/dict/dict0load.c index 65f1c9536bd..d5e7600f4d0 100644 --- a/storage/innobase/dict/dict0load.c +++ b/storage/innobase/dict/dict0load.c @@ -927,6 +927,8 @@ dict_load_table_on_id( ut_ad(mutex_own(&(dict_sys->mutex))); + table = NULL; + /* NOTE that the operation of this function is protected by the dictionary mutex, and therefore no deadlocks can occur with other dictionary operations. */ @@ -953,15 +955,17 @@ dict_load_table_on_id( BTR_SEARCH_LEAF, &pcur, &mtr); rec = btr_pcur_get_rec(&pcur); - if (!btr_pcur_is_on_user_rec(&pcur, &mtr) - || rec_get_deleted_flag(rec, 0)) { + if (!btr_pcur_is_on_user_rec(&pcur, &mtr)) { /* Not found */ + goto func_exit; + } - btr_pcur_close(&pcur); - mtr_commit(&mtr); - mem_heap_free(heap); - - return(NULL); + /* Find the first record that is not delete marked */ + while (rec_get_deleted_flag(rec, 0)) { + if (!btr_pcur_move_to_next_user_rec(&pcur, &mtr)) { + goto func_exit; + } + rec = btr_pcur_get_rec(&pcur); } /*---------------------------------------------------*/ @@ -974,19 +978,14 @@ dict_load_table_on_id( /* Check if the table id in record is the one searched for */ if (ut_dulint_cmp(table_id, mach_read_from_8(field)) != 0) { - - btr_pcur_close(&pcur); - mtr_commit(&mtr); - mem_heap_free(heap); - - return(NULL); + goto func_exit; } /* Now we get the table name from the record */ field = rec_get_nth_field_old(rec, 1, &len); /* Load the table definition to memory */ table = dict_load_table(mem_heap_strdupl(heap, (char*) field, len)); - +func_exit: btr_pcur_close(&pcur); mtr_commit(&mtr); mem_heap_free(heap);