Yuchen Pei e6fc36cfe3 MDEV-15621 Auto add RANGE COLUMNS partitions by interval ...

Allow auto partitioning by interval in PARTITION BY RANGE COLUMNS

PARTITION BY RANGE COLUMNS (col_name)
INTERVAL interval [AUTO]
(
  PARTITION partition_name VALUES LESS THAN (value)
  [, PARTITION partition_name VALUES LESS THAN (value) ... ]
)

where

- col_name is the name of one column of type DATE or DATETIME or
  TIMESTAMP

- at least one partition is supplied, and the highest partition cannot
  have MAXVALUE range

- INTERVAL interval is a positive time interval. it can be mariadb
  format or oracle NUMTODSINTERVAL/NUMTOYMINTERVAL format. Like
  versioning, the smallest unit is second, i.e. no subsecond like
  microsecond.

- DATE column cannot have interval with values less than a day

- Subpartitions are allowed, but restricted to existing subpartition
  types, i.e. [LINEAR] (KEY|HASH)

When performing one of the following DML statements on such a table,
it will first add partitions by the specified interval until the
partition covers the current time:

- INSERT
- INSERT ... SELECT
- LOAD
- UPDATE
- REPLACE
- REPLACE ... SELECT

Partition addition will not cause an implicit commit like DDL normally
does.

The partitions are named pN.

Otherwise the table behaves exactly the same as a normal RANGE COLUMNS
partitioned table.

Note that TIMESTAMP is not allowed as a type for PARTITION BY RANGE
COLUMNS otherwise.

Including the following fixes:

1.

MDEV-40088 Disallow subqueries in INTERVAL clause in range interval auto partitioning

This is consistent with system time (versioning) partitioning. Also
consistent is that both allow expressions otherwise.

2.

MDEV-40048 Allow trigger and LOCK TABLES to work with range interval auto partitioning

When a range interval auto partitioned table is the target of a
trigger, the triggering statement is not necessarily one that would
cause the auto-creation of new partitions, so we need to account for
that.

Also added support for LOCK TABLES ... WRITE.

Improved tests coverage by adapting tests from versioning.partition.

3.

MDEV-40467 Improve Y2038/2106 problem error message

When nearing the end times TIMESTAMP_MAX_VALUE, auto-partition
creation may encounter overflow when calculating new partition range.
This patch improves the message of such an overflow

2026-08-04 15:04:06 +10:00

15 KiB

Raw Permalink Blame History

View Raw