diff options
Diffstat (limited to 'storage/xtradb/dict/dict0stats.cc')
| -rw-r--r-- | storage/xtradb/dict/dict0stats.cc | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/storage/xtradb/dict/dict0stats.cc b/storage/xtradb/dict/dict0stats.cc index 12ead09d829..5c283f693d5 100644 --- a/storage/xtradb/dict/dict0stats.cc +++ b/storage/xtradb/dict/dict0stats.cc @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 2009, 2014, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 2009, 2015, 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 @@ -1488,7 +1488,6 @@ on the leaf page. when comparing records @param[out] n_diff number of distinct records @param[out] n_external_pages number of external pages -@param[in,out] mtr mini-transaction @return number of distinct records on the leaf page */ static void @@ -1496,8 +1495,7 @@ dict_stats_analyze_index_below_cur( const btr_cur_t* cur, ulint n_prefix, ib_uint64_t* n_diff, - ib_uint64_t* n_external_pages, - mtr_t* mtr) + ib_uint64_t* n_external_pages) { dict_index_t* index; ulint space; @@ -1511,6 +1509,7 @@ dict_stats_analyze_index_below_cur( ulint* offsets2; ulint* offsets_rec; ulint size; + mtr_t mtr; index = btr_cur_get_index(cur); @@ -1549,12 +1548,14 @@ dict_stats_analyze_index_below_cur( function without analyzing any leaf pages */ *n_external_pages = 0; + mtr_start(&mtr); + /* descend to the leaf level on the B-tree */ for (;;) { block = buf_page_get_gen(space, zip_size, page_no, RW_S_LATCH, NULL /* no guessed block */, - BUF_GET, __FILE__, __LINE__, mtr); + BUF_GET, __FILE__, __LINE__, &mtr); page = buf_block_get_frame(block); @@ -1576,6 +1577,8 @@ dict_stats_analyze_index_below_cur( ut_a(*n_diff > 0); if (*n_diff == 1) { + mtr_commit(&mtr); + /* page has all keys equal and the end of the page was reached by dict_stats_scan_page(), no need to descend to the leaf level */ @@ -1600,7 +1603,7 @@ dict_stats_analyze_index_below_cur( } /* make sure we got a leaf page as a result from the above loop */ - ut_ad(btr_page_get_level(page, mtr) == 0); + ut_ad(btr_page_get_level(page, &mtr) == 0); /* scan the leaf page and find the number of distinct keys, when looking only at the first n_prefix columns; also estimate @@ -1617,6 +1620,7 @@ dict_stats_analyze_index_below_cur( __func__, page_no, n_diff); #endif + mtr_commit(&mtr); mem_heap_free(heap); } @@ -1826,8 +1830,7 @@ dict_stats_analyze_index_for_n_prefix( dict_stats_analyze_index_below_cur(btr_pcur_get_btr_cur(&pcur), n_prefix, &n_diff_on_leaf_page, - &n_external_pages, - mtr); + &n_external_pages); /* We adjust n_diff_on_leaf_page here to avoid counting one record twice - once as the last on some page and once |