CREATE TABLE system_metrics ( host STRING, idc STRING, cpu_util DOUBLE, memory_util DOUBLE, disk_util DOUBLE, ts TIMESTAMP DEFAULT CURRENT_TIMESTAMP(), PRIMARY KEY(host, idc), TIME INDEX(ts) ) WITH (skip_wal = "true"); INSERT INTO system_metrics VALUES ("host1", "idc_a", 11.8, 10.3, 10.3, 1667446797450), ("host2", "idc_a", 80.0, 70.3, 90.0, 1667446797450), ("host1", "idc_b", 50.0, 66.7, 40.6, 1667446797450); -- SQLNESS ARG restart=true SELECT * FROM system_metrics; INSERT INTO system_metrics VALUES ("host1", "idc_a", 11.8, 10.3, 10.3, 1667446797450), ("host2", "idc_a", 80.0, 70.3, 90.0, 1667446797450), ("host1", "idc_b", 50.0, 66.7, 40.6, 1667446797450); ADMIN flush_table('system_metrics'); -- SQLNESS ARG restart=true SELECT * FROM system_metrics; DROP TABLE system_metrics; CREATE TABLE alter_skip_wal ( host STRING, val DOUBLE, ts TIMESTAMP, PRIMARY KEY(host), TIME INDEX(ts) ); INSERT INTO alter_skip_wal VALUES ('host1', 1, 1000); ALTER TABLE alter_skip_wal SET 'skip_wal' = 'true'; SHOW CREATE TABLE alter_skip_wal; ALTER TABLE alter_skip_wal SET 'skip_wal' = 'false'; ALTER TABLE alter_skip_wal UNSET 'skip_wal'; INSERT INTO alter_skip_wal VALUES ('host2', 2, 2000); SELECT * FROM alter_skip_wal ORDER BY ts; -- The post-ALTER row can be lost because restart does not flush skip-WAL memtables. -- SQLNESS ARG restart=true SHOW CREATE TABLE alter_skip_wal; SELECT * FROM alter_skip_wal ORDER BY ts; DROP TABLE alter_skip_wal;