SQL Reference Volume 1 - Ibm

CURRENT TIMECURRENT TIMEThe CURRENT TIME (or CURRENT_TIME) special register specifies a time that isbased on a reading of the time-of-day clock when the SQL statement is executed atthe application server. If this special register is used more than once within a singleSQL statement, or used with CURRENT DATE or CURRENT TIMESTAMP withina single statement, all values are based on a single clock reading.When used in an SQL statement inside a routine, CURRENT TIME is not inheritedfrom the invoking statement.In a federated system, CURRENT TIME can be used in a query intended for datasources. When the query is processed, the time returned will be obtained from theCURRENT TIME register at the federated server, not from the data sources.Example: Using the CL_SCHED table, select all the classes (CLASS_CODE) thatstart (STARTING) later today. Today’s classes have a value of 3 in the DAY column.SELECT CLASS_CODE FROM CL_SCHEDWHERE STARTING > CURRENT TIME AND DAY = 3150 SQL Reference Volume 1