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author | Sergei Golubchik <sergii@pisem.net> | 2013-04-15 15:09:22 +0200 |
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committer | Sergei Golubchik <sergii@pisem.net> | 2013-04-15 15:09:22 +0200 |
commit | a9035be5b7a7b3865ddb4ef34a5d0cfc65dfc254 (patch) | |
tree | a9df7341e91623f62fe37cd47fce139d8888fc95 /storage/innobase/trx/trx0rec.cc | |
parent | 3a1c91d87d69ef243b3e78be6089102cafef0a8e (diff) | |
parent | f57ecb7786177e0af3b1e3ec94302720b2e0f967 (diff) | |
download | mariadb-git-a9035be5b7a7b3865ddb4ef34a5d0cfc65dfc254.tar.gz |
10.0-base merge
Diffstat (limited to 'storage/innobase/trx/trx0rec.cc')
-rw-r--r-- | storage/innobase/trx/trx0rec.cc | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/storage/innobase/trx/trx0rec.cc b/storage/innobase/trx/trx0rec.cc index b87eac9362e..203139f23fd 100644 --- a/storage/innobase/trx/trx0rec.cc +++ b/storage/innobase/trx/trx0rec.cc @@ -1588,6 +1588,25 @@ trx_undo_prev_version_build( if (row_upd_changes_field_size_or_external(index, offsets, update)) { ulint n_ext; + /* We should confirm the existence of disowned external data, + if the previous version record is delete marked. If the trx_id + of the previous record is seen by purge view, we should treat + it as missing history, because the disowned external data + might be purged already. + + The inherited external data (BLOBs) can be freed (purged) + after trx_id was committed, provided that no view was started + before trx_id. If the purge view can see the committed + delete-marked record by trx_id, no transactions need to access + the BLOB. */ + + if ((update->info_bits & REC_INFO_DELETED_FLAG) + && read_view_sees_trx_id(purge_sys->view, trx_id)) { + /* treat as a fresh insert, not to + cause assertion error at the caller. */ + return(DB_SUCCESS); + } + /* We have to set the appropriate extern storage bits in the old version of the record: the extern bits in rec for those fields that update does NOT update, as well as the bits for |