Package org.h2.expression.function

Class BitFunction

java.lang.Object

org.h2.expression.Expression

org.h2.expression.Operation1_2

org.h2.expression.function.Function1_2

org.h2.expression.function.BitFunction

All Implemented Interfaces:

NamedExpression, HasSQL, Typed

public final class BitFunction
extends Function1_2

A bitwise function.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	BITAND	BITAND() (non-standard).
static final int	BITCOUNT	BITCOUNT() (non-standard).
static final int	BITGET	BITGET() (non-standard).
static final int	BITNAND	BITNAND() (non-standard).
static final int	BITNOR	BITNOR() (non-standard).
static final int	BITNOT	BITNOT() (non-standard).
static final int	BITOR	BITOR() (non-standard).
static final int	BITXNOR	BITXNOR() (non-standard).
static final int	BITXOR	BITXOR() (non-standard).
private final int	function
static final int	LSHIFT	LSHIFT() (non-standard).
private static final String[]	NAMES
static final int	ROTATELEFT	ROTATELEFT() (non-standard).
static final int	ROTATERIGHT	ROTATERIGHT() (non-standard).
static final int	RSHIFT	RSHIFT() (non-standard).
static final int	ULSHIFT	ULSHIFT() (non-standard).
static final int	URSHIFT	URSHIFT() (non-standard).

Fields inherited from class org.h2.expression.Operation1_2

left, right, 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
BitFunction(Expression arg1, Expression arg2, int function)

Method Summary

Modifier and Type	Method	Description
private static ValueBigint	bitCount(Value v1)
private static ValueBoolean	bitGet(Value v1, Value v2)
static TypeInfo	checkArgType(Expression arg)	Checks the type of an argument of bitwise function (one of BITAND, BITOR, BITXOR, BITNOT, BITNAND, BITNOR, BITXNOR).
private static Value	getBinaryString(int function, TypeInfo type, Value v1, Value v2)
static Value	getBitwise(int function, TypeInfo type, Value v1, Value v2)	Computes the value of bitwise function.
private static TypeInfo	getCommonType(Expression arg1, Expression arg2)
String	getName()	Get the name.
private static Value	getNumeric(int function, TypeInfo type, Value v1, Value v2)
Value	getValue(SessionLocal session, Value v1, Value v2)	Returns the value of this function.
Expression	optimize(SessionLocal session)	Try to optimize the expression.
private Expression	optimizeNot(SessionLocal session)
private static Value	rotate(Value v1, long offset, boolean right)
private static Value	shift(Value v1, long offset, boolean unsigned)

Methods inherited from class org.h2.expression.function.Function1_2

getUnenclosedSQL, getValue

Methods inherited from class org.h2.expression.Operation1_2

getCost, getSubexpression, getSubexpressionCount, getType, isEverything, mapColumns, 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 Details

BITAND

public static final int BITAND

BITAND() (non-standard).

See Also:

• Constant Field Values

BITOR

public static final int BITOR

BITOR() (non-standard).

See Also:

• Constant Field Values

BITXOR

public static final int BITXOR

BITXOR() (non-standard).

See Also:

• Constant Field Values

BITNOT

public static final int BITNOT

BITNOT() (non-standard).

See Also:

• Constant Field Values

BITNAND

public static final int BITNAND

BITNAND() (non-standard).

See Also:

• Constant Field Values

BITNOR

public static final int BITNOR

BITNOR() (non-standard).

See Also:

• Constant Field Values

BITXNOR

public static final int BITXNOR

BITXNOR() (non-standard).

See Also:

• Constant Field Values

BITGET

public static final int BITGET

BITGET() (non-standard).

See Also:

• Constant Field Values

BITCOUNT

public static final int BITCOUNT

BITCOUNT() (non-standard).

See Also:

• Constant Field Values

LSHIFT

public static final int LSHIFT

LSHIFT() (non-standard).

See Also:

• Constant Field Values

RSHIFT

public static final int RSHIFT

RSHIFT() (non-standard).

See Also:

• Constant Field Values

ULSHIFT

public static final int ULSHIFT

ULSHIFT() (non-standard).

See Also:

• Constant Field Values

URSHIFT

public static final int URSHIFT

URSHIFT() (non-standard).

See Also:

• Constant Field Values

ROTATELEFT

public static final int ROTATELEFT

ROTATELEFT() (non-standard).

See Also:

• Constant Field Values

ROTATERIGHT

public static final int ROTATERIGHT

ROTATERIGHT() (non-standard).

See Also:

• Constant Field Values

NAMES

private static final String[] NAMES

function

private final int function

Constructor Details

BitFunction

public BitFunction(Expression arg1,
 Expression arg2,
 int function)

Method Details

getValue

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

Description copied from class: Function1_2

Returns the value of this function.

Overrides:

getValue in class Function1_2

Parameters:

session - the session

v1 - the value of first argument

v2 - the value of second argument, or null

Returns:

the resulting value

bitGet

private static ValueBoolean bitGet(Value v1,
 Value v2)

bitCount

private static ValueBigint bitCount(Value v1)

shift

private static Value shift(Value v1,
 long offset,
 boolean unsigned)

rotate

private static Value rotate(Value v1,
 long offset,
 boolean right)

getBitwise

public static Value getBitwise(int function,
 TypeInfo type,
 Value v1,
 Value v2)

Computes the value of bitwise function.

Parameters:

function - one of BITAND, BITOR, BITXOR, BITNOT, BITNAND, BITNOR, BITXNOR

type - the type of result

v1 - the value of first argument

v2 - the value of second argument, or null

Returns:

the resulting value

getBinaryString

private static Value getBinaryString(int function,
 TypeInfo type,
 Value v1,
 Value v2)

getNumeric

private static Value getNumeric(int function,
 TypeInfo type,
 Value v1,
 Value v2)

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

optimizeNot

private Expression optimizeNot(SessionLocal session)

getCommonType

private static TypeInfo getCommonType(Expression arg1,
 Expression arg2)

checkArgType

public static TypeInfo checkArgType(Expression arg)

Checks the type of an argument of bitwise function (one of BITAND, BITOR, BITXOR, BITNOT, BITNAND, BITNOR, BITXNOR).

Parameters:

arg - the argument

Returns:

the type of the specified argument

Throws:

DbException - if argument type is not supported by bitwise functions

getName

public String getName()

Description copied from interface: NamedExpression

Get the name.

Returns:

the name in uppercase