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MDEV-23779 Error upon querying the view, that selecting from versioned table with partitions

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PARTITION clause in SELECT means query is non-versioned (see
WITH_PARTITION_STORAGE_ENGINE in vers_setup_conds()).

vers_setup_conds() expands such query to SYSTEM_TIME_ALL which is then
added to VIEW specification. When VIEW is queried both clauses
PARTITION and FOR SYSTEM_TIME ALL lead to ER_VERS_QUERY_IN_PARTITION
(same place WITH_PARTITION_STORAGE_ENGINE).

Fix removes FOR SYSTEM_TIME ALL from VIEW by accessing original
SYSTEM_TIME clause: the one specified in parser. As a side-effect
EXPLAIN SELECT displays SYSTEM_TIME specified in SELECT which is
user-friendly.
This commit is contained in:
Aleksey Midenkov
2020-10-20 10:49:54 +03:00
parent a3c379ea61
commit ddea8f6a39
7 changed files with 39 additions and 15 deletions
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4
mysql-test/suite/versioning/r/derived.result
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@ -211,12 +211,12 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 100.00 Using where; Using join buffer (flat, BNL join)
Query A:
Note 1003 select `test`.`t1`.`x` AS `x`,`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` > <cache>(current_timestamp(6)) and `test`.`t2`.`row_start` <= <cache>(current_timestamp(6)) and `test`.`t1`.`row_end` > <cache>(current_timestamp(6)) and `test`.`t1`.`row_start` <= <cache>(current_timestamp(6))
Note 1003 select `test`.`t1`.`x` AS `x`,`test`.`t1`.`y` AS `y1`,`test`.`t2`.`x` AS `x2`,`test`.`t2`.`y` AS `y2` from `test`.`t1` FOR SYSTEM_TIME AS OF TIMESTAMP current_timestamp(6) join `test`.`t2` FOR SYSTEM_TIME AS OF TIMESTAMP current_timestamp(6) where `test`.`t1`.`x` = `test`.`t2`.`x` and `test`.`t2`.`row_end` > <cache>(current_timestamp(6)) and `test`.`t2`.`row_start` <= <cache>(current_timestamp(6)) and `test`.`t1`.`row_end` > <cache>(current_timestamp(6)) and `test`.`t1`.`row_start` <= <cache>(current_timestamp(6))
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 100.00 Using where; Using join buffer (flat, BNL join)
Query B:
Note 1003 select `test`.`t1`.`x` AS `x`,`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` > <cache>(current_timestamp(6)) and `test`.`t2`.`row_start` <= <cache>(current_timestamp(6)) and `test`.`t1`.`row_end` > <cache>(current_timestamp(6)) and `test`.`t1`.`row_start` <= <cache>(current_timestamp(6))
Note 1003 select `test`.`t1`.`x` AS `x`,`test`.`t1`.`y` AS `y1`,`test`.`t2`.`x` AS `x2`,`test`.`t2`.`y` AS `y2` from `test`.`t1` FOR SYSTEM_TIME AS OF TIMESTAMP current_timestamp(6) join `test`.`t2` FOR SYSTEM_TIME AS OF TIMESTAMP current_timestamp(6) where `test`.`t1`.`x` = `test`.`t2`.`x` and `test`.`t2`.`row_end` > <cache>(current_timestamp(6)) and `test`.`t2`.`row_start` <= <cache>(current_timestamp(6)) and `test`.`t1`.`row_end` > <cache>(current_timestamp(6)) and `test`.`t1`.`row_start` <= <cache>(current_timestamp(6))
Fine result: queries A and B are equal.
## LEFT JOIN: t1, t2 versioned
select * from (