MDEV-38842 Server fails to drop .ibd file when vector table creation fails

[Thirunarayanan]

Problem:

When creating tables with vector indexes, if the secondary table creation fails after the main table is successfully created, the server was not properly cleaning up the main table's .ibd file. Stale file exists because create_table_impl() always called ddl_log_complete() on any error, which disables DDL log entries instead of executing them for cleanup. The main table would be left behind even though the overall CREATE TABLE operation failed.

Solution:

ha_create_table(): Return error code 2 specifically when secondary table creation for high-level indexes fails

create_table_impl(): Call ddl_log_revert() when error code is 2 to properly clean up the main table files.

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[dr-m]

I don’t think I can review this, because the changes are outside InnoDB and I wasn’t involved in the design, implementation, or review of MDEV-32887 Vector Search.