Clickhouse times always truncated to seconds

[mzealey]

In anything marked as a type: time, the following code causes Clickhouse DateTime64() columns to be truncated to per-second:

cube/packages/cubejs-schema-compiler/src/adapter/ClickHouseQuery.ts

Lines 42 to 51 in 1cf867a

	public convertTz(field) {
	//
	// field yields a Date or a DateTime so add in the extra toDateTime64 to support the Date case
	//
	// https://clickhouse.yandex/docs/en/data_types/datetime/
	// https://clickhouse.yandex/docs/en/query_language/functions/date_time_functions/
	//
	//
	return `toTimeZone(toDateTime64(${field}, 0), '${this.timezone}')`;
	}

In our case we are wanting to pull logs from the server (with ungrouped: true) and get them ordered according to millisecond/microsecond timestamps which are in the database.

In order to work around this issue I've had to resort to the following hack:

        - name: created    
          sql: created     
          type: time       
          primary_key: true

        - name: timestamp
          description: The unix epoch timestamp of the message
          sql: "toFloat64({CUBE}.created)"
          type: number