Package org.h2.expression.function

Class DBObjectFunction

java.lang.Object

org.h2.expression.Expression

org.h2.expression.OperationN

org.h2.expression.function.FunctionN

org.h2.expression.function.DBObjectFunction

All Implemented Interfaces:

ExpressionWithVariableParameters, NamedExpression, HasSQL, Typed

public final class DBObjectFunction
extends FunctionN

DB_OBJECT_ID() and DB_OBJECT_SQL() functions.

Field Summary

Fields

Modifier and Type	Field	Description
static int	DB_OBJECT_ID	DB_OBJECT_ID() (non-standard).
static int	DB_OBJECT_SQL	DB_OBJECT_SQL() (non-standard).
private int	function
private static java.lang.String[]	NAMES

Fields inherited from class org.h2.expression.OperationN

args, argsCount, type

Fields inherited from class org.h2.expression.Expression

AUTO_PARENTHESES, MAP_IN_AGGREGATE, MAP_IN_WINDOW, MAP_INITIAL, WITH_PARENTHESES, WITHOUT_PARENTHESES

Fields inherited from interface org.h2.util.HasSQL

ADD_PLAN_INFORMATION, DEFAULT_SQL_FLAGS, NO_CASTS, QUOTE_ONLY_WHEN_REQUIRED, REPLACE_LOBS_FOR_TRACE, TRACE_SQL_FLAGS

Constructor Summary

Constructors

Constructor	Description
DBObjectFunction(Expression objectType, Expression arg1, Expression arg2, int function)

Method Summary

Modifier and Type	Method	Description
java.lang.String	getName()	Get the name.
Value	getValue(SessionLocal session, Value v1, Value v2, Value v3)	Returns the value of this function.
boolean	isEverything(ExpressionVisitor visitor)	Check if this expression and all sub-expressions can fulfill a criteria.
Expression	optimize(SessionLocal session)	Try to optimize the expression.

Methods inherited from class org.h2.expression.function.FunctionN

getUnenclosedSQL, getValue

Methods inherited from class org.h2.expression.OperationN

addParameter, doneWithParameters, getCost, getSubexpression, getSubexpressionCount, getType, mapColumns, optimizeArguments, setEvaluatable, updateAggregate

Methods inherited from class org.h2.expression.Expression

addFilterConditions, createIndexConditions, getAlias, getBooleanValue, getColumnName, getColumnNameForView, getEnclosedSQL, getNonAliasExpression, getNotIfPossible, getNullable, getSchemaName, getSQL, getSQL, getSQL, getSQL, getTableAlias, getTableName, getWhenSQL, getWhenValue, isConstant, isIdentity, isNullConstant, isValueSet, isWhenConditionOperand, needParentheses, optimizeCondition, toString, writeExpressions, writeExpressions

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.h2.util.HasSQL

getTraceSQL

Field Detail

DB_OBJECT_ID

public static final int DB_OBJECT_ID

DB_OBJECT_ID() (non-standard).

See Also:

Constant Field Values

DB_OBJECT_SQL

public static final int DB_OBJECT_SQL

DB_OBJECT_SQL() (non-standard).

See Also:

Constant Field Values

NAMES

private static final java.lang.String[] NAMES

function

private final int function

Constructor Detail

DBObjectFunction

public DBObjectFunction(Expression objectType,
                        Expression arg1,
                        Expression arg2,
                        int function)

Method Detail

getValue

public Value getValue(SessionLocal session,
                      Value v1,
                      Value v2,
                      Value v3)

Description copied from class: FunctionN

Returns the value of this function.

Overrides:

getValue in class FunctionN

Parameters:

session - the session

v1 - the value of first argument, or null

v2 - the value of second argument, or null

v3 - the value of third argument, or null

Returns:

the resulting value

optimize

public Expression optimize(SessionLocal session)

Description copied from class: Expression

Try to optimize the expression.

Specified by:

optimize in class Expression

Parameters:

session - the session

Returns:

the optimized expression

isEverything

public boolean isEverything(ExpressionVisitor visitor)

Description copied from class: Expression

Check if this expression and all sub-expressions can fulfill a criteria. If any part returns false, the result is false.

Overrides:

isEverything in class OperationN

Parameters:

visitor - the visitor

Returns:

if the criteria can be fulfilled

getName

public java.lang.String getName()

Description copied from interface: NamedExpression

Get the name.

Returns:

the name in uppercase