Class CurrentDatetime
- java.lang.Object
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- 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
Fields Modifier and Type Field Description 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.
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Constructor Summary
Constructors Constructor Description CurrentDatetime()
The constructor is public; note we wait until evaluation to put any values into the fields.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description 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()
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Field Detail
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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.
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Method Detail
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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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