Apache Derby Database Engine and Embedded JDBC Driver 10.17.1.0 · org.apache.derby.impl.sql.execute.CurrentDatetime

CurrentDatetime provides execution support for ensuring that the current datetime is evaluated only once for a statement. The same value is returned for every CURRENT_DATE, CURRENT_TIME, and CURRENT_TIMESTAMP in the statement.

This is expected to be used by an activation and its result set, and so 'forget' must be called whenever you want to reuse the CurrentDatetime object for additional executions of the statement.

Field Summary

Modifier and Type	Field and Description
private Date	currentDate Holds the SQL DATE version of the current datetime.
private Date	currentDatetime Holds the current datetime on the first evaluation of a current function in a statement, which contains all available fields.
private Time	currentTime Holds the SQL TIME version of the current datetime.
private Timestamp	currentTimestamp Holds the SQL TIMESTAMP version of the current datetime.

Constructor Summary

Access	Constructor and Description
public	CurrentDatetime() The constructor is public; note we wait until evaluation to put any values into the fields.

Method Summary

Modifier and Type	Method and Description
public void	forget() This is called prior to each execution of the statement, to ensure that it starts over with a new current datetime value.
public Date	getCurrentDate()
public Time	getCurrentTime()
public Timestamp	getCurrentTimestamp()
private final void	setCurrentDatetime()

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

currentDate	back to summary
private Date currentDate Holds the SQL DATE version of the current datetime.

currentDatetime	back to summary
private Date currentDatetime Holds the current datetime on the first evaluation of a current function in a statement, which contains all available fields.

currentTime	back to summary
private Time currentTime Holds the SQL TIME version of the current datetime.

currentTimestamp	back to summary
private Timestamp currentTimestamp Holds the SQL TIMESTAMP version of the current datetime.

Constructor Detail

CurrentDatetime	back to summary
public CurrentDatetime() The constructor is public; note we wait until evaluation to put any values into the fields.

Method Detail

forget	back to summary
public void forget() This is called prior to each execution of the statement, to ensure that it starts over with a new current datetime value.

getCurrentDate	back to summary
public Date getCurrentDate()

getCurrentTime	back to summary
public Time getCurrentTime()

getCurrentTimestamp	back to summary
public Timestamp getCurrentTimestamp()