MySQL system databases and metadata: does MySQL keep its metadata in a database named “meta_sql”? Evaluate this claim against current and historical defaults.

Introduction / Context: Understanding where a DBMS stores metadata helps DBAs query object definitions, privileges, and performance statistics. MySQL provides well-known system schemas for this purpose; confusing their names may lead to incorrect administrative queries.

Given Data / Assumptions:

• The claim says MySQL keeps metadata in “meta_sql.”
• We compare this with actual MySQL system schemas.
• We consider mainstream MySQL distributions.

Concept / Approach: MySQL uses several system schemas: information_schema (virtual metadata views), performance_schema (instrumentation), and the mysql schema (users, privileges, time zone tables, and other internal data). There is no standard schema named “meta_sql.” Therefore, the statement is incorrect.

Step-by-Step Solution:

Verification / Alternative check: Run SHOW DATABASES; inspect the presence of the documented system schemas and the absence of “meta_sql.”

Why Other Options Are Wrong:

• OS, engine, or fork do not create a “meta_sql” schema by default.

Common Pitfalls: Confusing MySQL system schemas with SQL Server’s system databases or assuming custom admin-created schemas are universal.

Final Answer: Invalid (MySQL stores metadata in information_schema and related system schemas, not “meta_sql”)