net.ontopia.persistence.query.sql
Interface SQLAggregateIF

All Known Implementing Classes:

SQLAggregate, SQLAggregateReference

public interface SQLAggregateIF

INTERNAL: Represents an aggregate function in a SQL query.

Field Summary

static int

COUNT INTERNAL: Constant referring to the COUNT aggregate function.

Method Summary

java.lang.String	getAlias() INTERNAL: The column alias to use if this value is included in the projection.
SQLAggregateIF	getReference() INTERNAL: Returns the referenced aggregate if one exists.
int	getType() INTERNAL: Returns the aggregate function type indicated by one of the constants in the SQLAggregateIF interface.
SQLValueIF	getValue() INTERNAL: Returns the SQLValueIF that the aggregate function is to be evaluated against.
boolean	isReference() INTERNAL: Returns true if this aggregate is a reference to another.
void	setAlias(java.lang.String alias) INTERNAL: Sets the column alias.
void	setValue(SQLValueIF value) INTERNAL: Sets the SQLValueIF that the aggregate function is to be evaluated against.

Field Detail

COUNT

static final int COUNT

INTERNAL: Constant referring to the COUNT aggregate function.

See Also:

Constant Field Values

Method Detail

getType

int getType()

INTERNAL: Returns the aggregate function type indicated by one of the constants in the SQLAggregateIF interface.

getValue

SQLValueIF getValue()

INTERNAL: Returns the SQLValueIF that the aggregate function is to be evaluated against.

setValue

void setValue(SQLValueIF value)

INTERNAL: Sets the SQLValueIF that the aggregate function is to be evaluated against.

getAlias

java.lang.String getAlias()

INTERNAL: The column alias to use if this value is included in the projection. The SQL select syntax is typically like "select value as from foo".

setAlias

void setAlias(java.lang.String alias)

INTERNAL: Sets the column alias.

isReference

boolean isReference()

INTERNAL: Returns true if this aggregate is a reference to another.

getReference

SQLAggregateIF getReference()

INTERNAL: Returns the referenced aggregate if one exists.