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MDEV-37164 Assertion `vers_conditions.delete_history' failed upon PREPARE

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Wrong assertion was added by f1f9284181 (MDEV-34046) because PS
parameter is applicable not only to DELETE HISTORY.

Keeping value of select_lex->where for DELETE HISTORY was remade via
prep_where which is read by reinit_stmt_before_use(). For SELECT
prep_where is set in JOIN::optimize_inner() and that is not called for
DELETE.
This commit is contained in:
Aleksey Midenkov
2025-07-08 14:01:50 +03:00
parent 39f4908216
commit fc465596ea
3 changed files with 62 additions and 15 deletions
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41
mysql-test/suite/versioning/r/delete_history.result
View File

@@ -277,6 +277,40 @@ a row_start row_end
2 2000-01-01 00:00:01.000000 2000-01-01 00:00:02.000000
3 2000-01-01 00:00:02.000000 2038-01-19 03:14:07.999999
100 2000-01-01 00:00:00.000000 2038-01-19 03:14:07.999999
select *, row_start, row_end from t for system_time as of @ts1;
a row_start row_end
100 2000-01-01 00:00:00.000000 2038-01-19 03:14:07.999999
2 2000-01-01 00:00:01.000000 2000-01-01 00:00:02.000000
execute immediate "select *, row_start, row_end from t for system_time as of ?" using @ts1;
a row_start row_end
100 2000-01-01 00:00:00.000000 2038-01-19 03:14:07.999999
2 2000-01-01 00:00:01.000000 2000-01-01 00:00:02.000000
prepare stmt from 'select *, row_start, row_end from t for system_time as of ?';
execute stmt using @ts1;
a row_start row_end
100 2000-01-01 00:00:00.000000 2038-01-19 03:14:07.999999
2 2000-01-01 00:00:01.000000 2000-01-01 00:00:02.000000
Execute stmt using @ts1;
a row_start row_end
100 2000-01-01 00:00:00.000000 2038-01-19 03:14:07.999999
2 2000-01-01 00:00:01.000000 2000-01-01 00:00:02.000000
select *, row_start, row_end from t for system_time as of @ts2;
a row_start row_end
3 2000-01-01 00:00:02.000000 2038-01-19 03:14:07.999999
100 2000-01-01 00:00:00.000000 2038-01-19 03:14:07.999999
execute immediate "select *, row_start, row_end from t for system_time as of ?" using @ts2;
a row_start row_end
3 2000-01-01 00:00:02.000000 2038-01-19 03:14:07.999999
100 2000-01-01 00:00:00.000000 2038-01-19 03:14:07.999999
execute stmt using @ts2;
a row_start row_end
3 2000-01-01 00:00:02.000000 2038-01-19 03:14:07.999999
100 2000-01-01 00:00:00.000000 2038-01-19 03:14:07.999999
Execute stmt using @ts2;
a row_start row_end
3 2000-01-01 00:00:02.000000 2038-01-19 03:14:07.999999
100 2000-01-01 00:00:00.000000 2038-01-19 03:14:07.999999
drop prepare stmt;
execute immediate "delete history from t before system_time @ts1";
select *, row_start, row_end from t for system_time all order by a;
a row_start row_end
@@ -463,4 +497,11 @@ a row_start row_end
drop prepare stmt;
drop table t;
set timestamp= default;
#
# MDEV-37164 Assertion `vers_conditions.delete_history' failed upon PREPARE
#
create table t (a int) with system versioning;
insert into t values (1),(2);
prepare stmt from 'select * from t for system_time as of timestamp ?';
drop table t;
# End of 10.11 tests

19
mysql-test/suite/versioning/t/delete_history.test
View File

@@ -276,6 +276,17 @@ set @ts2= '2000-01-01 00:00:02'; set timestamp= unix_timestamp(@ts2);
update t set a= a + 1 where a < 100;
set @ts3= '2000-01-01 00:00:03'; set timestamp= unix_timestamp(@ts3);
select *, row_start, row_end from t for system_time all order by a;
select *, row_start, row_end from t for system_time as of @ts1;
execute immediate "select *, row_start, row_end from t for system_time as of ?" using @ts1;
prepare stmt from 'select *, row_start, row_end from t for system_time as of ?';
execute stmt using @ts1;
Execute stmt using @ts1;
select *, row_start, row_end from t for system_time as of @ts2;
execute immediate "select *, row_start, row_end from t for system_time as of ?" using @ts2;
execute stmt using @ts2;
Execute stmt using @ts2;
drop prepare stmt;
execute immediate "delete history from t before system_time @ts1";
select *, row_start, row_end from t for system_time all order by a;
execute immediate "delete history from t before system_time @ts2";
@@ -352,6 +363,14 @@ drop prepare stmt;
drop table t;
set timestamp= default;
--echo #
--echo # MDEV-37164 Assertion `vers_conditions.delete_history' failed upon PREPARE
--echo #
create table t (a int) with system versioning;
insert into t values (1),(2);
prepare stmt from 'select * from t for system_time as of timestamp ?';
drop table t;
--echo # End of 10.11 tests
--source suite/versioning/common_finish.inc

17
sql/sql_select.cc
View File

@@ -1279,21 +1279,7 @@ int SELECT_LEX::vers_setup_conds(THD *thd, TABLE_LIST *tables)
}
if (vers_conditions.type == SYSTEM_TIME_ALL)
{
if (vers_conditions.has_param)
{
/*
Parameter substitution (set_params_from_actual_params()) works
on existing items so we don't have to reevaluate table->where
(in update_this below), we just update SELECT_LEX WHERE expression
from existing table conditions.
*/
DBUG_ASSERT(vers_conditions.delete_history);
DBUG_ASSERT(thd->stmt_arena->is_stmt_execute());
where= and_items(thd, where, table->where);
}
continue;
}
}
bool timestamps_only= table->table->versioned(VERS_TIMESTAMP);
@@ -1322,7 +1308,6 @@ int SELECT_LEX::vers_setup_conds(THD *thd, TABLE_LIST *tables)
the loop, but at execution enter update_this. The second execution
is skipped on vers_conditions.type == SYSTEM_TIME_ALL condition.
*/
DBUG_ASSERT(vers_conditions.delete_history);
if (thd->stmt_arena->is_stmt_prepare())
continue;
DBUG_ASSERT(thd->stmt_arena->is_stmt_execute());
@@ -1347,6 +1332,8 @@ int SELECT_LEX::vers_setup_conds(THD *thd, TABLE_LIST *tables)
else
where= and_items(thd, where, cond);
table->where= and_items(thd, table->where, cond);
if (where && vers_conditions.has_param && vers_conditions.delete_history)
prep_where= where->copy_andor_structure(thd);
}
table->vers_conditions.set_all();