diff options
Diffstat (limited to 'storage/innobase/include/btr0types.h')
| -rw-r--r-- | storage/innobase/include/btr0types.h | 32 |
1 files changed, 18 insertions, 14 deletions
diff --git a/storage/innobase/include/btr0types.h b/storage/innobase/include/btr0types.h index 6118bfbc128..912c022c64f 100644 --- a/storage/innobase/include/btr0types.h +++ b/storage/innobase/include/btr0types.h @@ -1,7 +1,7 @@ /***************************************************************************** Copyright (c) 1996, 2015, Oracle and/or its affiliates. All Rights Reserved. -Copyright (c) 2018, 2022, MariaDB Corporation. +Copyright (c) 2018, 2023, MariaDB Corporation. 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 @@ -55,25 +55,26 @@ in the index record. */ #define BTR_EXTERN_LOCAL_STORED_MAX_SIZE \ (BTR_EXTERN_FIELD_REF_SIZE * 2) -/** Latching modes for btr_cur_search_to_nth_level(). */ +/** Latching modes for btr_cur_t::search_leaf(). */ enum btr_latch_mode { /** Search a record on a leaf page and S-latch it. */ BTR_SEARCH_LEAF = RW_S_LATCH, /** (Prepare to) modify a record on a leaf page and X-latch it. */ BTR_MODIFY_LEAF = RW_X_LATCH, + /** U-latch root and X-latch a leaf page */ + BTR_MODIFY_ROOT_AND_LEAF = RW_SX_LATCH, /** Obtain no latches. */ BTR_NO_LATCHES = RW_NO_LATCH, - /** Search the previous record. */ + /** Search the previous record. + Used in btr_pcur_move_backward_from_page(). */ BTR_SEARCH_PREV = 4 | BTR_SEARCH_LEAF, - /** Modify the previous record. */ + /** Modify the previous record. + Used in btr_pcur_move_backward_from_page() and ibuf_insert(). */ BTR_MODIFY_PREV = 4 | BTR_MODIFY_LEAF, - /** Start searching the entire B-tree. */ - BTR_SEARCH_TREE = 8 | BTR_SEARCH_LEAF, - /** Start modifying1 the entire B-tree. */ + /** Start modifying the entire B-tree. */ BTR_MODIFY_TREE = 8 | BTR_MODIFY_LEAF, - /** Continue searching the entire B-tree. */ - BTR_CONT_SEARCH_TREE = 4 | BTR_SEARCH_TREE, - /** Continue modifying the entire B-tree. */ + /** Continue modifying the entire R-tree. + Only used by rtr_search_to_nth_level(). */ BTR_CONT_MODIFY_TREE = 4 | BTR_MODIFY_TREE, /* BTR_INSERT, BTR_DELETE and BTR_DELETE_MARK are mutually @@ -98,14 +99,14 @@ enum btr_latch_mode { dict_index_t::lock S-latch is being held. */ BTR_SEARCH_LEAF_ALREADY_S_LATCHED = BTR_SEARCH_LEAF | BTR_ALREADY_S_LATCHED, - /** Search the entire index tree, assuming that the - dict_index_t::lock S-latch is being held. */ - BTR_SEARCH_TREE_ALREADY_S_LATCHED = BTR_SEARCH_TREE - | BTR_ALREADY_S_LATCHED, /** Search and X-latch a leaf page, assuming that the dict_index_t::lock is being held in non-exclusive mode. */ BTR_MODIFY_LEAF_ALREADY_LATCHED = BTR_MODIFY_LEAF | BTR_ALREADY_S_LATCHED, + /** U-latch root and X-latch a leaf page, assuming that + dict_index_t::lock is being held in U mode. */ + BTR_MODIFY_ROOT_AND_LEAF_ALREADY_LATCHED = BTR_MODIFY_ROOT_AND_LEAF + | BTR_ALREADY_S_LATCHED, /** Attempt to delete-mark a secondary index record. */ BTR_DELETE_MARK_LEAF = BTR_MODIFY_LEAF | BTR_DELETE_MARK, @@ -132,6 +133,9 @@ enum btr_latch_mode { /** Attempt to delete a record in the tree. */ BTR_PURGE_TREE = BTR_MODIFY_TREE | BTR_LATCH_FOR_DELETE, + /** Attempt to delete a record in an x-latched tree. */ + BTR_PURGE_TREE_ALREADY_LATCHED = BTR_PURGE_TREE + | BTR_ALREADY_S_LATCHED, /** Attempt to insert a record into the tree. */ BTR_INSERT_TREE = BTR_MODIFY_TREE | BTR_LATCH_FOR_INSERT, |