fix(mysql): return CHECKSUM TABLE result set

crates/dbx-core/src/db/mysql.rs

@@ -5291,7 +5291,7 @@ fn prefers_text_protocol_query(sql: &str, dialect: MySqlQueryDialect) -> bool {
 pub(crate) fn is_result_set_query(sql: &str, dialect: MySqlQueryDialect) -> bool {
     starts_with_executable_sql_keyword_for_database(
         sql,
-        &["SELECT", "SHOW", "DESCRIBE", "EXPLAIN", "WITH", "CALL"],
+        &["SELECT", "SHOW", "DESCRIBE", "EXPLAIN", "WITH", "CALL", "CHECKSUM"],
         DatabaseType::Mysql,
     ) || mysql_statement_returns_rows(sql)
         || is_xa_recover_query(sql)
@@ -6087,6 +6087,14 @@ mod tests {
         assert!(is_result_set_query("DESC users", MySqlQueryDialect::default()));
     }
 
+    #[test]
+    fn mysql_checksum_queries_are_treated_as_result_sets() {
+        let dialect = MySqlQueryDialect::default();
+
+        assert!(is_result_set_query("CHECKSUM TABLE `issue6693_repro`", dialect));
+        assert!(prefers_text_protocol_query("CHECKSUM TABLE `issue6693_repro`", dialect));
+    }
+
     #[test]
     fn mysql_call_queries_are_treated_as_text_result_sets() {
         let dialect = MySqlQueryDialect::default();

crates/dbx-core/src/query_execution_sql.rs

@@ -211,7 +211,7 @@ pub fn contains_dangerous_sql_keyword(sql: &str) -> bool {
 /// PRAGMA is intentionally NOT in this list because some PRAGMA statements modify
 /// database or session state (e.g. SQLite `PRAGMA journal_mode=WAL`). Instead,
 /// read-only PRAGMA forms are handled separately in `is_safe_read_pragma`.
-const READ_SQL_KEYWORDS: &[&str] = &["SELECT", "WITH", "SHOW", "DESCRIBE", "DESC", "EXPLAIN", "FROM"];
+const READ_SQL_KEYWORDS: &[&str] = &["SELECT", "WITH", "SHOW", "DESCRIBE", "DESC", "EXPLAIN", "FROM", "CHECKSUM"];
 
 /// PRAGMA names that are known to be safe read-only queries in SQLite/DuckDB.
 /// Only the function-call form `PRAGMA name(args)` matching these names is allowed.
@@ -1288,6 +1288,7 @@ mod tests {
         assert!(!is_write_sql("EXPLAIN SELECT * FROM users"));
         assert!(!is_write_sql("PRAGMA table_info(users)"));
         assert!(!is_write_sql("FROM users SELECT *"));
+        assert!(!is_write_sql("CHECKSUM TABLE `issue6693_repro`"));
     }
 
     #[test]