diff options
Diffstat (limited to 'storage/xtradb/btr/btr0pcur.c')
| -rw-r--r-- | storage/xtradb/btr/btr0pcur.c | 46 |
1 files changed, 19 insertions, 27 deletions
diff --git a/storage/xtradb/btr/btr0pcur.c b/storage/xtradb/btr/btr0pcur.c index 3929c4a9c2d..d1b3dc4a3e6 100644 --- a/storage/xtradb/btr/btr0pcur.c +++ b/storage/xtradb/btr/btr0pcur.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 @@ -111,7 +111,7 @@ btr_pcur_store_position( page_t* page; ulint offs; - ut_a(cursor->pos_state == BTR_PCUR_IS_POSITIONED); + ut_ad(cursor->pos_state == BTR_PCUR_IS_POSITIONED); ut_ad(cursor->latch_mode != BTR_NO_LATCHES); block = btr_pcur_get_block(cursor); @@ -128,7 +128,6 @@ btr_pcur_store_position( ut_ad(mtr_memo_contains(mtr, block, MTR_MEMO_PAGE_S_FIX) || mtr_memo_contains(mtr, block, MTR_MEMO_PAGE_X_FIX)); - ut_a(cursor->latch_mode != BTR_NO_LATCHES); if (UNIV_UNLIKELY(page_get_n_recs(page) == 0)) { /* It must be an empty index tree; NOTE that in this case @@ -239,21 +238,12 @@ btr_pcur_restore_position_func( ut_ad(mtr); ut_ad(mtr->state == MTR_ACTIVE); + ut_ad(cursor->old_stored == BTR_PCUR_OLD_STORED); + ut_ad(cursor->pos_state == BTR_PCUR_WAS_POSITIONED + || cursor->pos_state == BTR_PCUR_IS_POSITIONED); index = btr_cur_get_index(btr_pcur_get_btr_cur(cursor)); - if (UNIV_UNLIKELY(cursor->old_stored != BTR_PCUR_OLD_STORED) - || UNIV_UNLIKELY(cursor->pos_state != BTR_PCUR_WAS_POSITIONED - && cursor->pos_state != BTR_PCUR_IS_POSITIONED)) { - ut_print_buf(stderr, cursor, sizeof(btr_pcur_t)); - putc('\n', stderr); - if (cursor->trx_if_known) { - trx_print(stderr, cursor->trx_if_known, 0); - } - - ut_error; - } - if (UNIV_UNLIKELY (cursor->rel_pos == BTR_PCUR_AFTER_LAST_IN_TREE || cursor->rel_pos == BTR_PCUR_BEFORE_FIRST_IN_TREE)) { @@ -277,14 +267,14 @@ btr_pcur_restore_position_func( if (UNIV_LIKELY(latch_mode == BTR_SEARCH_LEAF) || UNIV_LIKELY(latch_mode == BTR_MODIFY_LEAF)) { - /* Try optimistic restoration */ + /* Try optimistic restoration. */ - if (UNIV_LIKELY(buf_page_optimistic_get( - latch_mode, - cursor->block_when_stored, - cursor->modify_clock, - file, line, mtr))) { + if (buf_page_optimistic_get(latch_mode, + cursor->block_when_stored, + cursor->modify_clock, + file, line, mtr)) { cursor->pos_state = BTR_PCUR_IS_POSITIONED; + cursor->latch_mode = latch_mode; buf_block_dbg_add_level( btr_pcur_get_block(cursor), @@ -296,9 +286,6 @@ btr_pcur_restore_position_func( const rec_t* rec; const ulint* offsets1; const ulint* offsets2; -#endif /* UNIV_DEBUG */ - cursor->latch_mode = latch_mode; -#ifdef UNIV_DEBUG rec = btr_pcur_get_rec(cursor); heap = mem_heap_create(256); @@ -316,7 +303,13 @@ btr_pcur_restore_position_func( #endif /* UNIV_DEBUG */ return(TRUE); } - + /* This is the same record as stored, + may need to be adjusted for BTR_PCUR_BEFORE/AFTER, + depending on search mode and direction. */ + if (btr_pcur_is_on_user_rec(cursor)) { + cursor->pos_state + = BTR_PCUR_IS_POSITIONED_OPTIMISTIC; + } return(FALSE); } } @@ -418,7 +411,7 @@ btr_pcur_move_to_next_page( buf_block_t* next_block; page_t* next_page; - ut_a(cursor->pos_state == BTR_PCUR_IS_POSITIONED); + ut_ad(cursor->pos_state == BTR_PCUR_IS_POSITIONED); ut_ad(cursor->latch_mode != BTR_NO_LATCHES); ut_ad(btr_pcur_is_after_last_on_page(cursor)); @@ -484,7 +477,6 @@ btr_pcur_move_backward_from_page( ulint latch_mode; ulint latch_mode2; - ut_a(cursor->pos_state == BTR_PCUR_IS_POSITIONED); ut_ad(cursor->latch_mode != BTR_NO_LATCHES); ut_ad(btr_pcur_is_before_first_on_page(cursor)); ut_ad(!btr_pcur_is_before_first_in_tree(cursor, mtr)); |