ModSQL
Interface Aggregate

All Superinterfaces:

Function

All Known Implementing Classes:

AbstractAggregate

public interface Aggregate

extends Function

Refinement of Function interface for aggregate functions.

Author:

chris.studholme@utoronto.ca

Fields inherited from interface ModSQL.Function

MATCH_BEGINS, MATCH_EQU, MATCH_GT, MATCH_GTE, MATCH_LT, MATCH_LTE, MATCH_NE

Method Summary

void	setDistinct() Specify that this aggregate should eliminate duplicate values before aggregating rows.

Methods inherited from interface ModSQL.Function

addParameter, evaluate, evaluate, evaluateOrder, getMaxResultSize, getParameter, getParameterCount, getSQLType, isAggregate, isConstant, optimize, registerWith, reset

Method Detail

setDistinct

public void setDistinct()
                 throws SQLException

Specify that this aggregate should eliminate duplicate values before aggregating rows.

This method must be called before optimize().

Throws:

SQLException - if DISTINCT is not allowed