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MDEV-5271 Support engine-defined attributes per partition

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Make it possible to specify engine-defined attributes on partitions
as well as tables.

If an engine-defined attribute is only specified at the table level,
it applies to all the partitions in the table.
This is a backward-compatible behavior.

If the same attribute is specified both at the table level and the
partition level, the per-partition one takes precedence.
So, we can consider per-table attributes as default values.

One cannot specify engine-defined attributes on subpartitions.

Implementation details:

* We store per-partition attributes in the partition_element class
  because we already have the part_comment field, which is for
  per-partition comments.

* In the case of ALTER TABLE statements, the partition_elements in
  table->part_info is set up by mysql_unpack_partition().
  So, we parse per-partition attributes after the call of the function.
This commit is contained in:
Nayuta Yanagisawa
2021-11-05 16:39:28 +09:00
parent 83dd7db69d
commit c5d09f731a
11 changed files with 588 additions and 124 deletions
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5
sql/sql_table.cc
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@ -7863,8 +7863,9 @@ mysql_prepare_alter_table(THD *thd, TABLE *table,
thd->calloc(sizeof(void*) * table->s->keys)) == NULL)
DBUG_RETURN(1);
create_info->option_list= merge_engine_table_options(table->s->option_list,
create_info->option_list, thd->mem_root);
if (merge_engine_options(table->s->option_list, create_info->option_list,
&create_info->option_list, thd->mem_root))
DBUG_RETURN(1);
/*
First collect all fields from table which isn't in drop_list