Functions for Working with UUID generateUUIDv4 empty notEmpty toUUID (x) toUUIDOrNull (x) toUUIDOrZero (x) UUIDStringToNum UUIDNumToString serverUUID() See Also Functi...
Dictionary Key and Fields Key Numeric Key Composite Key Attributes Dictionary Key and Fields The <structure> clause describes the dictionary key and fields available for qu...
system.time_zones system.time_zones Contains a list of time zones that are supported by the ClickHouse server. This list of timezones might vary depending on the version of Cli...
system.time_zones system.time_zones Contains a list of time zones that are supported by the ClickHouse server. This list of timezones might vary depending on the version of Cli...
system.metric_log system.metric_log Contains history of metrics values from tables system.metrics and system.events , periodically flushed to disk.To turn on metrics history c...
system.events system.events Contains information about the number of events that have occurred in the system. For example, in the table, you can find how many SELECT queries we...
system.asynchronous_metrics Help wanted! The following content of this documentation page has been machine-translated. But unlike other websites, it is not done on the fly. This...
系统。asynchronous_metrics Help wanted! The following content of this documentation page has been machine-translated. But unlike other websites, it is not done on the fly. This tra...