diff options
| author | Sergei Golubchik <serg@mariadb.org> | 2017-08-08 10:18:43 +0200 |
|---|---|---|
| committer | Sergei Golubchik <serg@mariadb.org> | 2017-08-08 10:18:43 +0200 |
| commit | 8e8d42ddf0291b2364fef8e3224e65d596ef4202 (patch) | |
| tree | 056e6f1c489477cb7e1c285924e88f8f02e5918b /sql/uniques.cc | |
| parent | 2395adfbfd6b4425981053f074865769414b5614 (diff) | |
| parent | ef2e51c39637ace64b66fa82b834e31f0e4ef38a (diff) | |
| download | mariadb-git-8e8d42ddf0291b2364fef8e3224e65d596ef4202.tar.gz | |
Merge branch '10.0' into 10.1
Diffstat (limited to 'sql/uniques.cc')
| -rw-r--r-- | sql/uniques.cc | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/sql/uniques.cc b/sql/uniques.cc index 63eb6e0eb90..e88cd035549 100644 --- a/sql/uniques.cc +++ b/sql/uniques.cc @@ -483,7 +483,7 @@ void put_counter_into_merged_element(void *ptr, uint ofs, element_count cnt) <> 0 error */ -static bool merge_walk(uchar *merge_buffer, ulong merge_buffer_size, +static bool merge_walk(uchar *merge_buffer, size_t merge_buffer_size, uint key_length, BUFFPEK *begin, BUFFPEK *end, tree_walk_action walk_action, void *walk_action_arg, qsort_cmp2 compare, void *compare_arg, @@ -492,7 +492,7 @@ static bool merge_walk(uchar *merge_buffer, ulong merge_buffer_size, BUFFPEK_COMPARE_CONTEXT compare_context = { compare, compare_arg }; QUEUE queue; if (end <= begin || - merge_buffer_size < (ulong) (key_length * (end - begin + 1)) || + merge_buffer_size < (size_t) (key_length * (end - begin + 1)) || init_queue(&queue, (uint) (end - begin), offsetof(BUFFPEK, key), 0, buffpek_compare, &compare_context, 0, 0)) return 1; @@ -642,15 +642,19 @@ bool Unique::walk(TABLE *table, tree_walk_action action, void *walk_action_arg) return 1; if (flush_io_cache(&file) || reinit_io_cache(&file, READ_CACHE, 0L, 0, 0)) return 1; - size_t buff_sz= (max_in_memory_size / full_size + 1) * full_size; + /* + merge_buffer must fit at least MERGEBUFF2 keys, because + merge_index() can merge that many BUFFPEKs at once. + */ + size_t buff_sz= MY_MAX(MERGEBUFF2, max_in_memory_size/full_size+1) * full_size; if (!(merge_buffer = (uchar *)my_malloc(buff_sz, MYF(MY_THREAD_SPECIFIC|MY_WME)))) return 1; if (buff_sz < full_size * (file_ptrs.elements + 1UL)) res= merge(table, merge_buffer, buff_sz >= full_size * MERGEBUFF2) ; - + if (!res) - { - res= merge_walk(merge_buffer, (ulong) max_in_memory_size, full_size, + { + res= merge_walk(merge_buffer, buff_sz, full_size, (BUFFPEK *) file_ptrs.buffer, (BUFFPEK *) file_ptrs.buffer + file_ptrs.elements, action, walk_action_arg, |