Eric 699a09e847 MDEV-38144: update Optional_metadata_fields to use MariaDB types ...

Currently Optional_metadata_fields has many members that use classes
from the C++ standard library, most notably the use of std::vector and
std::string. This is inconsistent with the coding standards, as MariaDB
defines its own types for arrays/lists/strings. This patch updates
these variables to use existing MariaDB types.

Additionally, the structure of the fields is changed. Instead of having
a separate list to track each metadata field; the structure now exists
at the column level (Column_metadata), and it has individual member
variables to describe its metadata. This allows for more
straightforward memory management, as everything will now be allocated
at once.

There is also a bug fix in this patch. Prior to this refactor, YEAR
columns would not consume their "unsigned" bit flag, resulting in
numeric columns after a YEAR type to have incorrect signage. This is
now fixed.

Reviewed-by: Brandon Nesterenko <brandon.nesterenko@mariadb.com>.

2026-09-15 11:28:15 +03:00

9.4 KiB

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