1 /*
2 Copyright (c) 2013, 2021, Oracle and/or its affiliates.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License, version 2.0,
6 as published by the Free Software Foundation.
7
8 This program is also distributed with certain software (including
9 but not limited to OpenSSL) that is licensed under separate terms,
10 as designated in a particular file or component or in included license
11 documentation. The authors of MySQL hereby grant you an additional
12 permission to link the program and your derivative works with the
13 separately licensed software that they have included with MySQL.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License, version 2.0, for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software Foundation,
22 51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */
23
24 #include "transaction_info.h"
25 #include "mysys_err.h"
26 #include "sql_class.h"
27
Transaction_ctx()28 Transaction_ctx::Transaction_ctx()
29 : m_savepoints(NULL), m_xid_state(), m_changed_tables(NULL),
30 last_committed(0), sequence_number(0),
31 m_rpl_transaction_ctx(), m_transaction_write_set_ctx()
32 {
33 memset(&m_scope_info, 0, sizeof(m_scope_info));
34 memset(&m_flags, 0, sizeof(m_flags));
35 init_sql_alloc(key_memory_thd_transactions, &m_mem_root,
36 global_system_variables.trans_alloc_block_size,
37 global_system_variables.trans_prealloc_size);
38 }
39
40
push_unsafe_rollback_warnings(THD * thd)41 void Transaction_ctx::push_unsafe_rollback_warnings(THD *thd)
42 {
43 if (m_scope_info[SESSION].has_modified_non_trans_table())
44 push_warning(thd, Sql_condition::SL_WARNING,
45 ER_WARNING_NOT_COMPLETE_ROLLBACK,
46 ER(ER_WARNING_NOT_COMPLETE_ROLLBACK));
47
48 if (m_scope_info[SESSION].has_created_temp_table())
49 push_warning(thd, Sql_condition::SL_WARNING,
50 ER_WARNING_NOT_COMPLETE_ROLLBACK_WITH_CREATED_TEMP_TABLE,
51 ER(ER_WARNING_NOT_COMPLETE_ROLLBACK_WITH_CREATED_TEMP_TABLE));
52
53 if (m_scope_info[SESSION].has_dropped_temp_table())
54 push_warning(thd, Sql_condition::SL_WARNING,
55 ER_WARNING_NOT_COMPLETE_ROLLBACK_WITH_DROPPED_TEMP_TABLE,
56 ER(ER_WARNING_NOT_COMPLETE_ROLLBACK_WITH_DROPPED_TEMP_TABLE));
57 }
58
59
add_changed_table(const char * key,long key_length)60 bool Transaction_ctx::add_changed_table(const char *key, long key_length)
61 {
62 DBUG_ENTER("Transaction_ctx::add_changed_table");
63 CHANGED_TABLE_LIST **prev_changed = &m_changed_tables;
64 CHANGED_TABLE_LIST *curr = m_changed_tables;
65
66 for (; curr; prev_changed = &(curr->next), curr = curr->next)
67 {
68 int cmp = (long)curr->key_length - key_length;
69 if (cmp < 0)
70 {
71 if (list_include(prev_changed, curr,
72 changed_table_dup(key, key_length)))
73 DBUG_RETURN(true);
74
75 DBUG_PRINT("info",
76 ("key_length: %ld %u", key_length,
77 (*prev_changed)->key_length));
78 DBUG_RETURN(false);
79 }
80 else if (cmp == 0)
81 {
82 cmp = memcmp(curr->key, key, curr->key_length);
83 if (cmp < 0)
84 {
85 if (list_include(prev_changed, curr, changed_table_dup(key, key_length)))
86 DBUG_RETURN(true);
87
88 DBUG_PRINT("info",
89 ("key_length: %ld %u", key_length,
90 (*prev_changed)->key_length));
91 DBUG_RETURN(false);
92 }
93 else if (cmp == 0)
94 {
95 DBUG_PRINT("info", ("already in list"));
96 DBUG_RETURN(false);
97 DBUG_RETURN(false);
98 }
99 }
100 }
101 *prev_changed = changed_table_dup(key, key_length);
102 if (!(*prev_changed))
103 DBUG_RETURN(true);
104 DBUG_PRINT("info", ("key_length: %ld %u", key_length,
105 (*prev_changed)->key_length));
106 DBUG_RETURN(false);
107 }
108
109
changed_table_dup(const char * key,long key_length)110 CHANGED_TABLE_LIST* Transaction_ctx::changed_table_dup(const char *key,
111 long key_length)
112 {
113 CHANGED_TABLE_LIST* new_table =
114 (CHANGED_TABLE_LIST*) allocate_memory(
115 ALIGN_SIZE(sizeof(CHANGED_TABLE_LIST)) + key_length + 1);
116 if (!new_table)
117 {
118 my_error(EE_OUTOFMEMORY, MYF(ME_FATALERROR),
119 ALIGN_SIZE(sizeof(TABLE_LIST)) + key_length + 1);
120 return 0;
121 }
122
123 new_table->key= ((char*)new_table)+ ALIGN_SIZE(sizeof(CHANGED_TABLE_LIST));
124 new_table->next = 0;
125 new_table->key_length = key_length;
126 ::memcpy(new_table->key, key, key_length);
127 return new_table;
128 }
129