mysqltest vector_index.vector_index_alter_table: SHOW CREATE TABLE omits backticks for partition key column in partition clause

Environment

• Platform: Android (arm64)
• Device: Android Studio emulator (emulator-5554)
• Binary Path: /data/local/tmp/seekdb
• Start Command: ./data/local/tmp/seekdb --nodaemon --base-dir /data/local/tmp/seekdb_data --port 5881
• Listening Port: 5881

Description

During the execution of the mysqltest case vector_index.vector_index_alter_table, the output of SHOW CREATE TABLE for a partitioned table is incorrect. The partition clause in the displayed CREATE TABLE statement omits the required backticks (`) around the partition key column names.

Steps to Reproduce

1. Set up the test environment as described in the Environment section.
2. Execute the mysqltest case vector_index.vector_index_alter_table.
3. Observe the output of the SHOW CREATE TABLE command within the test.

Expected Result: The SHOW CREATE TABLE output should show the partition clause with column names properly quoted in backticks (e.g., PARTITION BY KEY(column_name)).

Actual Result: The partition clause is displayed without backticks (e.g., PARTITION BY KEY(column_name)).

Start by running the mysqltest case vector_index.vector_index_alter_table and inspect the SHOW CREATE TABLE output for its partition clause. Trace the formatting path for partition key column names; done means the output includes backticks around those names and the test passes.