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org.apache.derby.impl.sql.execute
Class CurrentDatetime  

java.lang.Object
  org.apache.derby.impl.sql.execute.CurrentDatetime

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public class CurrentDatetime

extends java.lang.Object

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.

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

 

Constructor Summary

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

 

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

 

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Field Detail

currentDatetime

private java.util.Date currentDatetime

Holds the current datetime on the first evaluation of a current function in a statement, which contains all available fields.

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currentDate

private java.sql.Date currentDate

Holds the SQL DATE version of the current datetime.

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currentTime

private java.sql.Time currentTime

Holds the SQL TIME version of the current datetime.

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currentTimestamp

private java.sql.Timestamp currentTimestamp

Holds the SQL TIMESTAMP version of the current datetime.

Constructor Detail

CurrentDatetime

public CurrentDatetime()

The constructor is public; note we wait until evaluation to put any values into the fields.

Method Detail

setCurrentDatetime

private final void setCurrentDatetime()

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getCurrentDate

public java.sql.Date getCurrentDate()

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getCurrentTime

public java.sql.Time getCurrentTime()

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getCurrentTimestamp

public java.sql.Timestamp getCurrentTimestamp()

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forget

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.

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> apache >> derby >> impl >> sql >> [ execute overview ]	PREV CLASS  NEXT CLASS
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