uk.ac.ed.epcc.webapp.jdbc.expr

Interface DateSQLExpression

All Superinterfaces:

GroupingSQLValue<java.util.Date>, SQLExpression<java.util.Date>, SQLValue<java.util.Date>, Targetted<java.util.Date>

All Known Implementing Classes:

DateDerefSQLExpression, MysqlDateConverter, PostgresqlDateConverter, TimestampDateFieldExpression

public interface DateSQLExpression
extends SQLExpression<java.util.Date>

A Date valued SQLExpression where the underlying representation is really a numeric value. This provides additional methods to access that numeric value. This should not be used for expressions that are natively implemented as a Date.

Method Summary

Modifier and Type	Method and Description
SQLExpression<? extends java.lang.Number>	getMillis() get an SQLExpression for the millisecond value of the date
SQLExpression<? extends java.lang.Number>	getSeconds() get an SQLExpression for the second value of the date
boolean	preferSeconds() Would this expression preferentially use seconds

Methods inherited from interface uk.ac.ed.epcc.webapp.jdbc.expr.SQLExpression

equals, groupingIsomorphic, hashCode

Methods inherited from interface uk.ac.ed.epcc.webapp.jdbc.expr.GroupingSQLValue

addGroup, checkContentsCanGroup, getGroupParameters

Methods inherited from interface uk.ac.ed.epcc.webapp.jdbc.expr.SQLValue

add, getParameters, getRequiredFilter, makeObject

Methods inherited from interface uk.ac.ed.epcc.webapp.Targetted

getTarget

Method Detail

getMillis

SQLExpression<? extends java.lang.Number> getMillis()

get an SQLExpression for the millisecond value of the date

Returns:

SQLExpression giving milliseconds since epoch

getSeconds

SQLExpression<? extends java.lang.Number> getSeconds()

get an SQLExpression for the second value of the date

Returns:

SQLExpression giving seconds since epoch

preferSeconds

boolean preferSeconds()

Would this expression preferentially use seconds

Returns:

boolean