SHOW FLUSH ALL
Note
SDK methods: getFlushAllState.
SHOW FLUSH ALL ? IN DATABASE archive;
SHOW FLUSH ALL timestamp calls getFlushAllState once and returns one row with BIGINT FLUSH_ALL_TS and BOOLEAN FLUSHED. Supply a non-negative BIGINT literal or setLong() binding. Preserve the native integer token rather than converting it to a Java date or floating-point value. Observation neither triggers flush nor waits automatically. False means the native completion condition has not been met; absent SDK state remains NULL rather than fabricated success.
Use the same database scope as the FLUSH ALL request.