diff options
Diffstat (limited to 'row/row0ins.c')
| -rw-r--r-- | row/row0ins.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/row/row0ins.c b/row/row0ins.c index 0002f4410d6..ee2938e4865 100644 --- a/row/row0ins.c +++ b/row/row0ins.c @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1996, 2012, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 1996, 2013, Oracle and/or its affiliates. All Rights Reserved. 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 @@ -1710,6 +1710,7 @@ row_ins_scan_sec_index_for_duplicate( do { const rec_t* rec = btr_pcur_get_rec(&pcur); const buf_block_t* block = btr_pcur_get_block(&pcur); + ulint lock_type; if (page_rec_is_infimum(rec)) { @@ -1719,6 +1720,16 @@ row_ins_scan_sec_index_for_duplicate( offsets = rec_get_offsets(rec, index, offsets, ULINT_UNDEFINED, &heap); + /* If the transaction isolation level is no stronger than + READ COMMITTED, then avoid gap locks. */ + if (!page_rec_is_supremum(rec) + && thr_get_trx(thr)->isolation_level + <= TRX_ISO_READ_COMMITTED) { + lock_type = LOCK_REC_NOT_GAP; + } else { + lock_type = LOCK_ORDINARY; + } + if (allow_duplicates) { /* If the SQL-query will update or replace @@ -1727,13 +1738,11 @@ row_ins_scan_sec_index_for_duplicate( INSERT ON DUPLICATE KEY UPDATE). */ err = row_ins_set_exclusive_rec_lock( - LOCK_ORDINARY, block, - rec, index, offsets, thr); + lock_type, block, rec, index, offsets, thr); } else { err = row_ins_set_shared_rec_lock( - LOCK_ORDINARY, block, - rec, index, offsets, thr); + lock_type, block, rec, index, offsets, thr); } switch (err) { |