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MDEV-29069 follow-up: allow deterministic DEFAULTs

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This commit is contained in:
Nikita Malyavin
2022-07-19 00:29:42 +03:00
committed by Sergei Golubchik
parent 2be4c836e5
commit bac728a263
2 changed files with 17 additions and 7 deletions
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8
mysql-test/main/alter_table_online_debug.result
View File

@ -1073,8 +1073,8 @@ update t set a = a + 1 where a = 10;
set debug_sync= 'now signal goforit';
connection default;
Warnings:
Note 1105 Key chosen: -1
Note 1105 Key chosen: -1
Note 1105 Key chosen: 0
Note 1105 Key chosen: 0
select a from t;
a
11
@ -1093,8 +1093,8 @@ update t set a = a + 1 where a = 10;
set debug_sync= 'now signal goforit';
connection default;
Warnings:
Note 1105 Key chosen: -1
Note 1105 Key chosen: -1
Note 1105 Key chosen: 0
Note 1105 Key chosen: 0
#
# Add key for old row
#

16
sql/log_event_server.cc
View File

@ -7107,11 +7107,12 @@ record_compare_differ:
bool Rows_log_event::is_key_usable(const KEY *key) const
{
RPL_TABLE_LIST *tl= (RPL_TABLE_LIST*)m_table->pos_in_table_list;
const bool online_alter= tl->m_online_alter_copy_fields;
if (!m_table->s->keys_in_use.is_set(uint(key - m_table->key_info)))
return false;
if (!tl->m_online_alter_copy_fields)
if (!online_alter)
{
if (m_cols.n_bits >= m_table->s->fields)
return true;
@ -7126,8 +7127,17 @@ bool Rows_log_event::is_key_usable(const KEY *key) const
for (uint p= 0; p < key->user_defined_key_parts; p++)
{
uint field_idx= key->key_part[p].fieldnr - 1;
if (!bitmap_is_set(&m_table->has_value_set, field_idx))
Field *f= key->key_part[p].field;
/*
in the online alter case (but not in replication) we don't have
to reject an index if it includes new columns, as long as
their values are deterministic.
*/
bool non_deterministic_default= f->default_value &&
f->default_value->flags & VCOL_NOT_STRICTLY_DETERMINISTIC;
bool next_number_field= f == f->table->next_number_field;
if (!bitmap_is_set(&m_table->has_value_set, f->field_index) &&
(!online_alter || non_deterministic_default || next_number_field))
return false;
}
return true;