Module com.aoindustries.aoserv.client

Package com.aoindustries.aoserv.client.sql

Class SqlCount

java.lang.Object

com.aoindustries.aoserv.client.sql.SqlCount

All Implemented Interfaces:

SqlExpression

public final class SqlCount
extends Object
implements SqlExpression

Counts the number of rows.

Author:

AO Industries, Inc.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	COUNT	The case-insensitive function name.
static final String	COUNT_FUNCTION	The case-insensitive representation as a function.

Constructor Summary

Constructors

Constructor	Description
SqlCount(AoservConnector conn)

Method Summary

Modifier and Type	Method	Description
Object	evaluateAggregate(AoservConnector conn, List<AoservObject<?,?>> rows)	Evaluates the aggregate expression on the given connector and rows.
String	getColumnName()
Type	getType()	The return type of this expression.
boolean	isAggregate()	Is this an aggregate function?
String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.aoindustries.aoserv.client.sql.SqlExpression

evaluate, getReferencedTables

Field Details

COUNT

public static final String COUNT

The case-insensitive function name.

See Also:

• Constant Field Values

COUNT_FUNCTION

public static final String COUNT_FUNCTION

The case-insensitive representation as a function.

See Also:

• Constant Field Values

Constructor Details

SqlCount

public SqlCount(AoservConnector conn)
         throws SQLException,
IOException

Throws:

SQLException

IOException

Method Details

toString

public String toString()

Overrides:

toString in class Object

getColumnName

public String getColumnName()

Specified by:

getColumnName in interface SqlExpression

evaluateAggregate

public Object evaluateAggregate(AoservConnector conn,
 List<AoservObject<?,?>> rows)

Description copied from interface: SqlExpression

Evaluates the aggregate expression on the given connector and rows.

Specified by:

evaluateAggregate in interface SqlExpression

isAggregate

public boolean isAggregate()

Description copied from interface: SqlExpression

Is this an aggregate function? Controls whether evaluation is performed via SqlExpression.evaluate(com.aoindustries.aoserv.client.AoservConnector, com.aoindustries.aoserv.client.AoservObject) or SqlExpression.evaluateAggregate(com.aoindustries.aoserv.client.AoservConnector, java.util.List). Please be sure to implement the corresponding evaluation function.

Specified by:

isAggregate in interface SqlExpression

getType

public Type getType()

Description copied from interface: SqlExpression

The return type of this expression.

Specified by:

getType in interface SqlExpression