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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-13 12:24:36 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-13 12:24:36 +0000 |
commit | 06eaf7232e9a920468c0f8d74dcf2fe8b555501c (patch) | |
tree | e2c7b5777f728320e5b5542b6213fd3591ba51e2 /storage/maria/ma_commit.c | |
parent | Initial commit. (diff) | |
download | mariadb-06eaf7232e9a920468c0f8d74dcf2fe8b555501c.tar.xz mariadb-06eaf7232e9a920468c0f8d74dcf2fe8b555501c.zip |
Adding upstream version 1:10.11.6.upstream/1%10.11.6
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'storage/maria/ma_commit.c')
-rw-r--r-- | storage/maria/ma_commit.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/storage/maria/ma_commit.c b/storage/maria/ma_commit.c new file mode 100644 index 00000000..4bd64bfd --- /dev/null +++ b/storage/maria/ma_commit.c @@ -0,0 +1,132 @@ +/* Copyright (C) 2007-2008 MySQL AB, 2008-2009 Sun Microsystems, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; version 2 of the License. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */ + +#include "maria_def.h" +#include "trnman.h" +#include "ma_trnman.h" + +/** + writes a COMMIT record to log and commits transaction in memory + + @param trn transaction + + @return Operation status + @retval 0 ok + @retval 1 error (disk error or out of memory) +*/ + +int ma_commit(TRN *trn) +{ + int res; + LSN commit_lsn; + LEX_CUSTRING log_array[TRANSLOG_INTERNAL_PARTS]; + DBUG_ENTER("ma_commit"); + + DBUG_ASSERT(trn->rec_lsn == LSN_IMPOSSIBLE); + if (trn->undo_lsn == 0) /* no work done, rollback (cheaper than commit) */ + DBUG_RETURN(trnman_rollback_trn(trn)); + /* + - if COMMIT record is written before trnman_commit_trn(): + if Checkpoint comes in the middle it will see trn is not committed, + then if crash, Recovery might roll back trn (if MY_MIN(rec_lsn) is after + COMMIT record) and this is not an issue as + * transaction's updates were not made visible to other transactions + * "commit ok" was not sent to client + Alternatively, Recovery might commit trn (if MY_MIN(rec_lsn) is before + COMMIT record), which is ok too. All in all it means that "trn committed" + is not 100% equal to "COMMIT record written". + - if COMMIT record is written after trnman_commit_trn(): + if crash happens between the two, trn will be rolled back which is an + issue (transaction's updates were made visible to other transactions). + So we need to go the first way. + + Note that we have to use | here to ensure that all calls are made. + */ + + /* + We do not store "thd->transaction.xid_state.xid" for now, it will be + needed only when we support XA. + */ + res= (translog_write_record(&commit_lsn, LOGREC_COMMIT, + trn, NULL, 0, + sizeof(log_array)/sizeof(log_array[0]), + log_array, NULL, NULL) | + translog_flush(commit_lsn)); + + DBUG_EXECUTE_IF("maria_sleep_in_commit", + { + DBUG_PRINT("info", ("maria_sleep_in_commit")); + sleep(3); + }); + res|= trnman_commit_trn(trn); + + + /* + Note: if trnman_commit_trn() fails above, we have already + written the COMMIT record, so Checkpoint and Recovery will see the + transaction as committed. + */ + DBUG_RETURN(res); +} + + +/** + Writes a COMMIT record for a transaciton associated with a file + + @param info Maria handler + + @return Operation status + @retval 0 ok + @retval # error (disk error or out of memory) +*/ + +int maria_commit(MARIA_HA *info) +{ + TRN *trn; + if (!info->s->now_transactional) + return 0; + trn= info->trn; + _ma_reset_trn_for_table(info); + return ma_commit(trn); +} + + +/** + Starts a transaction on a file handle + + @param info Maria handler + + @return Operation status + @retval 0 ok + @retval # Error code. + + @note this can be used only in single-threaded programs (tests), + because we create a transaction (trnman_new_trn) with WT_THD=0. + XXX it needs to be fixed when we'll start using maria_begin from SQL. +*/ + +int maria_begin(MARIA_HA *info) +{ + DBUG_ENTER("maria_begin"); + + if (info->s->now_transactional) + { + TRN *trn= trnman_new_trn(0); + if (unlikely(!trn)) + DBUG_RETURN(HA_ERR_OUT_OF_MEM); + _ma_set_trn_for_table(info, trn); + } + DBUG_RETURN(0); +} |