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https://github.com/MariaDB/server.git
synced 2025-01-31 11:01:52 +01:00
46be31982a
MDEV-16100 FOR SYSTEM_TIME erroneously resolves string user variables as transaction IDs
Problem:
Vers_history_point::resolve_unit() tested item->result_type() before
item->fix_fields() was called.
- Item_func_get_user_var::result_type() returned REAL_RESULT by default.
This caused MDEV-16100.
- Item_func_sp::result_type() crashed on assert.
This caused MDEV-16094
Changes:
1. Adding item->fix_fields() into Vers_history_point::resolve_unit()
before using data type specific properties of the history point
expression.
2. Adding a new virtual method Type_handler::Vers_history_point_resolve_unit()
3. Implementing type-specific
Type_handler_xxx::Type_handler::Vers_history_point_resolve_unit()
in the way to:
a. resolve temporal and general purpose string types to TIMESTAMP
b. resolve BIT and general purpose INT types to TRANSACTION
c. disallow use of non-relevant data type expressions in FOR SYSTEM_TIME
Note, DOUBLE and DECIMAL data types are disallowed intentionally.
- DOUBLE does not have enough precision to hold huge BIGINT UNSIGNED values
- DECIMAL rounds on conversion to INT
Both lack of precision and rounding might potentionally lead to
very unpredictable results when a wrong transaction ID would be chosen.
If one really wants dangerous use of DOUBLE and DECIMAL, explicit CAST
can be used:
FOR SYSTEM_TIME AS OF CAST(double_or_decimal AS UNSIGNED)
QQ: perhaps DECIMAL(N,0) could still be allowed.
4. Adding a new virtual method Item::type_handler_for_system_time(),
to make HEX hybrids and bit literals work as TRANSACTION rather
than TIMESTAMP.
5. sql_yacc.yy: replacing the rule temporal_literal to "TIMESTAMP TEXT_STRING".
Other temporal literals now resolve to TIMESTAMP through the new
Type_handler methods. No special grammar needed. This removed
a few shift/resolve conflicts.
(TIMESTAMP related conflicts in "history_point:" will be removed separately)
6. Removing the "timestamp_only" parameter from
vers_select_conds_t::resolve_units() and Vers_history_point::resolve_unit().
It was a hint telling that a table did not have any TRANSACTION-aware
system time columns, so it's OK to resolve to TIMESTAMP in case of uncertainty.
In the new reduction it works as follows:
- the decision between TIMESTAMP and TRANSACTION is first made
based only on the expression data type only
- then, in case if the expression resolved to TRANSACTION, the table
is checked if TRANSACTION-aware columns really exist.
This way is safer against possible ALTER TABLE statements changing
ROW START and ROW END columns from "BIGINT UNSIGNED" to "TIMESTAMP(x)"
or the other way around.
576 lines
16 KiB
Text
576 lines
16 KiB
Text
create or replace table t1 (
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x int unsigned,
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y int unsigned,
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sys_trx_start SYS_DATATYPE as row start invisible,
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sys_trx_end SYS_DATATYPE as row end invisible,
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period for system_time (sys_trx_start, sys_trx_end)
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) with system versioning;
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insert into t1 (x, y) values
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(0, 100),
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(1, 101),
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(2, 102),
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(3, 103),
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(4, 104),
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(5, 105),
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(6, 106),
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(7, 107),
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(8, 108),
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(9, 109);
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set @t0= now(6);
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delete from t1 where x = 3;
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delete from t1 where x > 7;
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insert into t1(x, y) values(3, 33);
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select sys_trx_start from t1 where x = 3 and y = 33 into @t1;
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select x, y from t1;
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x y
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0 100
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1 101
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2 102
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4 104
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5 105
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6 106
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7 107
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3 33
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select x as ASOF_x, y from t1 for system_time as of timestamp @t0;
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ASOF_x y
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0 100
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1 101
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2 102
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3 103
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4 104
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5 105
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6 106
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7 107
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8 108
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9 109
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select x as FROMTO_x, y from t1 for system_time from timestamp '0-0-0 0:0:0' to timestamp @t1;
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FROMTO_x y
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0 100
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1 101
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2 102
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3 103
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4 104
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5 105
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6 106
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7 107
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8 108
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9 109
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select x as BETWAND_x, y from t1 for system_time between timestamp '0-0-0 0:0:0' and timestamp @t1;
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BETWAND_x y
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0 100
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1 101
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2 102
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3 103
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4 104
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5 105
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6 106
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7 107
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8 108
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9 109
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3 33
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select x as ALL_x, y from t1 for system_time all;
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ALL_x y
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0 100
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1 101
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2 102
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3 103
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4 104
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5 105
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6 106
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7 107
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8 108
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9 109
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3 33
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ASOF2_x y
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0 100
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1 101
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2 102
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3 103
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4 104
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5 105
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6 106
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7 107
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8 108
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9 109
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FROMTO2_x y
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0 100
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1 101
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2 102
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3 103
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4 104
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5 105
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6 106
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7 107
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8 108
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9 109
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BETWAND2_x y
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0 100
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1 101
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2 102
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3 103
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4 104
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5 105
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6 106
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7 107
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8 108
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9 109
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3 33
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create or replace table t1 (
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x int unsigned,
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y int unsigned
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) with system versioning;
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create or replace table t2 (
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x int unsigned,
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y int unsigned
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) with system versioning;
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insert into t1 values (1, 1), (1, 2), (1, 3), (4, 4), (5, 5);
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insert into t2 values (1, 2), (2, 1), (3, 1);
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set @t0= now(6);
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select t1.x as IJ1_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 inner join t2 on t1.x = t2.x;
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IJ1_x1 y1 x2 y2
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1 1 1 2
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1 2 1 2
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1 3 1 2
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select t1.x as LJ1_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 left join t2 on t1.x = t2.x;
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LJ1_x1 y1 x2 y2
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1 1 1 2
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1 2 1 2
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1 3 1 2
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4 4 NULL NULL
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5 5 NULL NULL
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select t1.x as RJ1_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 right join t2 on t1.x = t2.x;
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RJ1_x1 y1 x2 y2
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1 1 1 2
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1 2 1 2
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1 3 1 2
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NULL NULL 2 1
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NULL NULL 3 1
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delete from t1;
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delete from t2;
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explain extended select * from (select t1.x as IJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 inner join t2 on t1.x = t2.x)
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for system_time as of timestamp @t0 as t;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
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1 SIMPLE t1 ALL NULL NULL NULL NULL 5 100.00 Using where; Using join buffer (flat, BNL join)
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Warnings:
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Note 1003 select `test`.`t1`.`x` AS `IJ2_x1`,`test`.`t1`.`y` AS `y1`,`test`.`t2`.`x` AS `x2`,`test`.`t2`.`y` AS `y2` from `test`.`t1` FOR SYSTEM_TIME ALL join `test`.`t2` FOR SYSTEM_TIME ALL where `test`.`t1`.`x` = `test`.`t2`.`x` and `test`.`t2`.`row_end` > @`t0` and `test`.`t2`.`row_start` <= @`t0` and `test`.`t1`.`row_end` > @`t0` and `test`.`t1`.`row_start` <= @`t0`
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explain extended select * from (select t1.x as LJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 left join t2 on t1.x = t2.x)
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for system_time as of timestamp @t0 as t;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 5 100.00 Using where
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1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
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Warnings:
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Note 1003 select `test`.`t1`.`x` AS `LJ2_x1`,`test`.`t1`.`y` AS `y1`,`test`.`t2`.`x` AS `x2`,`test`.`t2`.`y` AS `y2` from `test`.`t1` FOR SYSTEM_TIME ALL left join `test`.`t2` FOR SYSTEM_TIME ALL on(`test`.`t2`.`x` = `test`.`t1`.`x` and `test`.`t2`.`row_end` > @`t0` and `test`.`t2`.`row_start` <= @`t0`) where `test`.`t1`.`row_end` > @`t0` and `test`.`t1`.`row_start` <= @`t0`
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explain extended select * from (select t1.x as RJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 right join t2 on t1.x = t2.x)
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for system_time as of timestamp @t0 as t;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
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1 SIMPLE t1 ALL NULL NULL NULL NULL 5 100.00 Using where; Using join buffer (flat, BNL join)
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Warnings:
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Note 1003 select `test`.`t1`.`x` AS `RJ2_x1`,`test`.`t1`.`y` AS `y1`,`test`.`t2`.`x` AS `x2`,`test`.`t2`.`y` AS `y2` from `test`.`t2` FOR SYSTEM_TIME ALL left join `test`.`t1` FOR SYSTEM_TIME ALL on(`test`.`t1`.`x` = `test`.`t2`.`x` and `test`.`t1`.`row_end` > @`t0` and `test`.`t1`.`row_start` <= @`t0`) where `test`.`t2`.`row_end` > @`t0` and `test`.`t2`.`row_start` <= @`t0`
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select * from (select t1.x as IJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 inner join t2 on t1.x = t2.x)
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for system_time as of timestamp @t0 as t;
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IJ2_x1 y1 x2 y2
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1 1 1 2
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1 2 1 2
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1 3 1 2
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select * from (select t1.x as LJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 left join t2 on t1.x = t2.x)
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for system_time as of timestamp @t0 as t;
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LJ2_x1 y1 x2 y2
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1 1 1 2
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1 2 1 2
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1 3 1 2
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4 4 NULL NULL
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5 5 NULL NULL
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select * from (select t1.x as RJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 right join t2 on t1.x = t2.x)
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for system_time as of timestamp @t0 as t;
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RJ2_x1 y1 x2 y2
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1 1 1 2
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1 2 1 2
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1 3 1 2
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NULL NULL 2 1
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NULL NULL 3 1
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drop table t1;
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drop table t2;
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create table t1(
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A int
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) with system versioning;
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insert into t1 values(1);
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select * from t1;
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A
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1
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create or replace table t1 (x int);
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insert into t1 values (1);
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select * from t1 for system_time all;
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ERROR HY000: Table `t1` is not system-versioned
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create or replace table t1 (x int) with system versioning;
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insert into t1 values (1);
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select * from t1 for system_time all for update;
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x
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1
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create or replace table t1 (a int not null auto_increment primary key) with system versioning;
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select * from (t1 as t2 left join t1 as t3 using (a)) natural left join t1;
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a
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create or replace table t1 (a int) with system versioning;
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create or replace table t2 (a int) with system versioning;
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insert into t1 values(1);
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insert into t2 values(1);
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create view v1 as select * from t2 inner join t1 using (a);
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select * from v1;
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a
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1
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drop view v1;
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create or replace table t1 (a int) with system versioning;
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insert into t1 values (1);
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create view vt1 as select a from t1;
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select * from t1 natural join vt1;
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a
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1
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drop view vt1;
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create or replace table t1(x int) with system versioning;
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select * from (t1 as r left join t1 as u using (x)), t1;
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x x
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create or replace table t1 (a int) with system versioning;
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insert into t1 values (1);
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create trigger read_end after update on t1
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for each row set @end = old.row_end;
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update t1 set a=2;
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select @end;
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@end
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MAX_RESULT
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create or replace table t1 (a int) with system versioning;
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create or replace table t2 (b int) with system versioning;
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insert into t1 values (1);
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insert into t2 values (2);
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select * from (select * from t1 cross join t2) as tmp;
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a b
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1 2
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select * from (select * from (select * from t1 cross join t2) as tmp1) as tmp2;
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a b
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1 2
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select * from (select * from t1 cross join t2 for system_time as of timestamp ('0-0-0')) as tmp;
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a b
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create or replace table t1(a1 int) with system versioning;
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create or replace table t2(a2 int) with system versioning;
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insert into t1 values(1),(2);
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insert into t2 values(1),(2);
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select * from t1 for system_time all natural left join t2 for system_time all;
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a1 a2
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1 1
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2 1
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1 2
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2 2
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create or replace table t1(a1 int) with system versioning;
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create or replace table t2(a2 int) with system versioning;
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insert into t1 values(1),(2);
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insert into t2 values(1),(2);
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create or replace view v1 as select a1 from t1;
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select * from v1 natural join t2;
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a1 a2
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1 1
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2 1
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1 2
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2 2
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select * from v1 natural left join t2;
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a1 a2
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1 1
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2 1
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1 2
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2 2
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select * from v1 natural right join t2;
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a2 a1
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1 1
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2 1
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1 2
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2 2
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create or replace table t1 (a int) with system versioning;
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insert into t1 values (1);
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insert into t1 values (2);
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insert into t1 values (3);
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explain extended
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select * from t1 left outer join (t1 as t2 left join t1 as t3 using (a)) on t1.a>1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where
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1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
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1 SIMPLE t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
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Warnings:
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Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a` from `test`.`t1` FOR SYSTEM_TIME ALL left join (`test`.`t1` FOR SYSTEM_TIME ALL `t2` left join `test`.`t1` FOR SYSTEM_TIME ALL `t3` on(`test`.`t3`.`a` = `test`.`t2`.`a` and `test`.`t3`.`row_end` = TIMESTAMP'2038-01-19 03:14:07.999999')) on(`test`.`t2`.`row_end` = TIMESTAMP'2038-01-19 03:14:07.999999' and `test`.`t1`.`a` > 1) where `test`.`t1`.`row_end` = TIMESTAMP'2038-01-19 03:14:07.999999'
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select * from t1 left outer join (t1 as t2 left join t1 as t3 using (a)) on t1.a>1;
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a a
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2 1
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3 1
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2 2
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3 2
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2 3
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3 3
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1 NULL
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create or replace table t1 (x int) with system versioning;
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create or replace table t2 (y int) with system versioning;
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insert into t1 values (1), (2), (3);
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delete from t1 where x = 3;
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insert into t2 values (1);
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select * from t1, t2 for system_time all;
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x y
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1 1
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2 1
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select * from (select * from t1 for system_time all, t2 for system_time all)
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for system_time all as t;
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ERROR HY000: Table `t` is not system-versioned
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# TRANSACTION/TIMESTAMP specifier in SYSTEM_TIME [MDEV-14645, Issue #396]
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create or replace table t1 (x int) with system versioning engine myisam;
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select * from t1 for system_time as of transaction 1;
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ERROR HY000: Transaction system versioning for `t1` is not supported
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create or replace table t1 (
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x int,
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sys_trx_start bigint unsigned as row start invisible,
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sys_trx_end bigint unsigned as row end invisible,
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period for system_time (sys_trx_start, sys_trx_end)
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) with system versioning engine innodb;
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insert into t1 values (1);
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set @ts= now(6);
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delete from t1;
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select sys_trx_start from t1 for system_time all into @trx_start;
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## ensure @trx_start is much lower than unix timestamp
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select @trx_start < unix_timestamp(@ts) - 100 as trx_start_good;
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trx_start_good
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1
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## TIMESTAMP specifier
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select x from t1 for system_time as of timestamp @ts;
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x
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1
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set @ts= timestamp'1-1-1 0:0:0';
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select x from t1 for system_time as of timestamp @ts;
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x
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## TRANSACTION specifier
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select x from t1 for system_time as of transaction @trx_start;
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x
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1
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## no specifier (auto-detection)
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select x from t1 for system_time as of @ts;
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x
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select x from t1 for system_time as of @trx_start;
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x
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1
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### Issue #365, bug 4 (related to #226, optimized fields)
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create or replace table t1 (i int, b int) with system versioning;
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insert into t1 values (0, 0), (0, 0);
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select min(i) over (partition by b) as f
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from (select i + 0 as i, b from t1) as tt
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order by i;
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f
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0
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0
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### Issue #365, bug 5 (dangling AND)
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create or replace table t1 (a int);
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create or replace table t2 (b int) with system versioning;
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select * from t1
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where exists (select 1 from t2 where t2.b = t1.a and t2.b = t1.a);
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a
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### Issue #365, bug 9 (not a derived subquery)
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create or replace table t1 (x int) with system versioning;
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select t1.x in (select x from t1) a from t1, (select x from t1) b;
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a
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### Issue #365, bug 10 (WHERE cond freed prematurely for PS)
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create or replace table t1 (x int) with system versioning;
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insert into t1 values (1);
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create or replace view v1 as select x from t1 where x = 1;
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prepare stmt from "
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select x from t1 where x in (select x from v1);";
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execute stmt;
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x
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1
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execute stmt;
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x
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1
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### Issue #365, bug 11 (WHERE cond not top level item)
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create or replace table t1 (a int, b int, key idx(a)) with system versioning;
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insert into t1 values (1, 1), (2, 2);
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select * from t1 where (a, 2) in ((1, 1), (2, 2)) and b = 1;
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a b
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### Issue #398, NOW is now non-magic
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create or replace table t1 (x int) with system versioning;
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select * from t1 for system_time as of current_timestamp;
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x
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|
select * from t1 for system_time as of now;
|
|
ERROR 42S22: Unknown column 'now' in 'FOR SYSTEM_TIME'
|
|
### Issue #405, NATURAL JOIN failure
|
|
create or replace table t1 (a int) with system versioning;
|
|
create or replace table t2 (b int);
|
|
create or replace view v1 as select a, row_start, row_end from t1 where a > round(rand()*1000);
|
|
select * from v1 natural join t2;
|
|
a row_start row_end b
|
|
#
|
|
# Issue #406, MDEV-14633 Assertion on TRT read
|
|
#
|
|
create or replace table t1 (pk int primary key, i int, t time, key (i)) with system versioning;
|
|
insert into t1 values (1, 10, '15:01:53'), (2, 20, '00:00:00');
|
|
delete from t1;
|
|
select * from t1 where t = '00:00:00' and i > 0 and row_end <> '2012-12-12 00:00:00';
|
|
pk i t
|
|
#
|
|
# MDEV-14816 Assertion `join->best_read < double(1.797...e+308L)' failed in bool greedy_search
|
|
#
|
|
create or replace table t1 (f1 int) with system versioning;
|
|
create or replace table t2 (f2 int) with system versioning;
|
|
create or replace table t3 (f3 int);
|
|
create or replace table t4 (f4 int);
|
|
insert into t1 values (1), (2), (3), (4);
|
|
insert into t2 values (1), (2), (3);
|
|
insert into t3 values (1), (2);
|
|
insert into t4 values (1);
|
|
select * from
|
|
t1 as t1a
|
|
left join t2 as t2a left join (t3 as t3a inner join t1) on t2a.f2 = t3a.f3 on t1a.f1 = t2a.f2
|
|
left join (t2 join t3 inner join t4) on t2a.f2 = t1a.f1;
|
|
f1 f2 f3 f1 f2 f3 f4
|
|
1 1 1 1 1 1 1
|
|
2 2 2 1 1 1 1
|
|
1 1 1 2 1 1 1
|
|
2 2 2 2 1 1 1
|
|
1 1 1 3 1 1 1
|
|
2 2 2 3 1 1 1
|
|
1 1 1 4 1 1 1
|
|
2 2 2 4 1 1 1
|
|
1 1 1 1 1 2 1
|
|
2 2 2 1 1 2 1
|
|
1 1 1 2 1 2 1
|
|
2 2 2 2 1 2 1
|
|
1 1 1 3 1 2 1
|
|
2 2 2 3 1 2 1
|
|
1 1 1 4 1 2 1
|
|
2 2 2 4 1 2 1
|
|
1 1 1 1 2 1 1
|
|
2 2 2 1 2 1 1
|
|
1 1 1 2 2 1 1
|
|
2 2 2 2 2 1 1
|
|
1 1 1 3 2 1 1
|
|
2 2 2 3 2 1 1
|
|
1 1 1 4 2 1 1
|
|
2 2 2 4 2 1 1
|
|
1 1 1 1 2 2 1
|
|
2 2 2 1 2 2 1
|
|
1 1 1 2 2 2 1
|
|
2 2 2 2 2 2 1
|
|
1 1 1 3 2 2 1
|
|
2 2 2 3 2 2 1
|
|
1 1 1 4 2 2 1
|
|
2 2 2 4 2 2 1
|
|
1 1 1 1 3 1 1
|
|
2 2 2 1 3 1 1
|
|
1 1 1 2 3 1 1
|
|
2 2 2 2 3 1 1
|
|
1 1 1 3 3 1 1
|
|
2 2 2 3 3 1 1
|
|
1 1 1 4 3 1 1
|
|
2 2 2 4 3 1 1
|
|
1 1 1 1 3 2 1
|
|
2 2 2 1 3 2 1
|
|
1 1 1 2 3 2 1
|
|
2 2 2 2 3 2 1
|
|
1 1 1 3 3 2 1
|
|
2 2 2 3 3 2 1
|
|
1 1 1 4 3 2 1
|
|
2 2 2 4 3 2 1
|
|
3 3 NULL NULL 1 1 1
|
|
3 3 NULL NULL 1 2 1
|
|
3 3 NULL NULL 2 1 1
|
|
3 3 NULL NULL 2 2 1
|
|
3 3 NULL NULL 3 1 1
|
|
3 3 NULL NULL 3 2 1
|
|
4 NULL NULL NULL NULL NULL NULL
|
|
#
|
|
# MDEV-15004 parser greedily parses AS OF TIMESTAMP
|
|
#
|
|
select timestamp'2016-02-30 08:07:06';
|
|
ERROR HY000: Incorrect DATETIME value: '2016-02-30 08:07:06'
|
|
select * from t1 for system_time as of timestamp'2016-02-30 08:07:06';
|
|
ERROR HY000: Incorrect DATETIME value: '2016-02-30 08:07:06'
|
|
select timestamp('2003-12-31 12:00:00','12:00:00');
|
|
timestamp('2003-12-31 12:00:00','12:00:00')
|
|
2004-01-01 00:00:00
|
|
select * from t1 for system_time as of timestamp('2003-12-31 12:00:00','12:00:00');
|
|
f1
|
|
#
|
|
# MDEV-15391 Server crashes in JOIN::fix_all_splittings_in_plan or Assertion `join->best_read < double(1.79...e+308L)' failed [tempesta-tech#475]
|
|
#
|
|
create or replace table t1 (f1 int) with system versioning;
|
|
insert t1 values (1),(2);
|
|
create or replace table t2 (f2 int);
|
|
create or replace table t3 (f3 int);
|
|
create or replace table t4 (f4 int) with system versioning;
|
|
select f1 from t1 join t2 left join t3 left join t4 on f3 = f4 on f3 = f2;
|
|
f1
|
|
insert t2 values (1),(2);
|
|
insert t3 values (1),(2);
|
|
insert t4 values (1),(2);
|
|
explain extended
|
|
select f1 from t1 join t2 left join t3 left join t4 on f3 = f4 on f3 = f2;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 Using where
|
|
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join)
|
|
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
|
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`f1` AS `f1` from `test`.`t1` FOR SYSTEM_TIME ALL join `test`.`t2` left join (`test`.`t3` left join `test`.`t4` FOR SYSTEM_TIME ALL on(`test`.`t4`.`f4` = `test`.`t2`.`f2` and `test`.`t4`.`row_end` = TIMESTAMP'2038-01-19 03:14:07.999999')) on(`test`.`t3`.`f3` = `test`.`t2`.`f2`) where `test`.`t1`.`row_end` = TIMESTAMP'2038-01-19 03:14:07.999999'
|
|
drop view v1;
|
|
drop table t1, t2, t3, t4;
|
|
#
|
|
# MDEV-15980 FOR SYSTEM_TIME BETWEEN and FROM .. TO work with negative intervals
|
|
#
|
|
create or replace table t1 (
|
|
a int,
|
|
row_start SYS_DATATYPE as row start invisible,
|
|
row_end SYS_DATATYPE as row end invisible,
|
|
period for system_time (row_start, row_end)
|
|
) with system versioning;
|
|
insert into t1 values (1);
|
|
delete from t1;
|
|
select row_start from t1 for system_time all into @t1;
|
|
select row_end from t1 for system_time all into @t2;
|
|
select * from t1 for system_time between @t1 and @t2;
|
|
a
|
|
1
|
|
select * from t1 for system_time between @t2 and @t1;
|
|
a
|
|
select * from t1 for system_time from @t1 to @t2;
|
|
a
|
|
1
|
|
select * from t1 for system_time from @t2 to @t1;
|
|
a
|
|
drop table t1;
|
|
call verify_trt_dummy(34);
|
|
No A B C D
|
|
1 1 1 1 1
|
|
2 1 1 1 1
|
|
3 1 1 1 1
|
|
4 1 1 1 1
|
|
5 1 1 1 1
|
|
6 1 1 1 1
|
|
7 1 1 1 1
|
|
8 1 1 1 1
|
|
9 1 1 1 1
|
|
10 1 1 1 1
|
|
11 1 1 1 1
|
|
12 1 1 1 1
|
|
13 1 1 1 1
|
|
14 1 1 1 1
|
|
15 1 1 1 1
|
|
16 1 1 1 1
|
|
17 1 1 1 1
|
|
18 1 1 1 1
|
|
19 1 1 1 1
|
|
20 1 1 1 1
|
|
21 1 1 1 1
|
|
22 1 1 1 1
|
|
23 1 1 1 1
|
|
24 1 1 1 1
|
|
25 1 1 1 1
|
|
26 1 1 1 1
|
|
27 1 1 1 1
|
|
28 1 1 1 1
|
|
29 1 1 1 1
|
|
30 1 1 1 1
|
|
31 1 1 1 1
|
|
32 1 1 1 1
|
|
33 1 1 1 1
|
|
34 1 1 1 1
|