Package org.h2.expression

Class IntervalOperation

java.lang.Object

org.h2.expression.Expression

org.h2.expression.Operation2

org.h2.expression.IntervalOperation

All Implemented Interfaces:

HasSQL, Typed

public class IntervalOperation
extends Operation2

A mathematical operation with intervals.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	IntervalOperation.IntervalOpType

Field Summary

Fields

Modifier and Type	Field	Description
private TypeInfo	forcedType
private static final int	INTERVAL_DAY_DIGITS	Number of digits enough to hold INTERVAL '999999999999999999' DAY / INTERVAL '0.000000001' SECOND.
private static final TypeInfo	INTERVAL_DIVIDE_INTERVAL_DAY_TYPE
private static final TypeInfo	INTERVAL_DIVIDE_INTERVAL_YEAR_TYPE
private static final int	INTERVAL_YEAR_DIGITS	Number of digits enough to hold INTERVAL '999999999999999999' YEAR / INTERVAL '1' MONTH.
private final IntervalOperation.IntervalOpType	opType

Fields inherited from class org.h2.expression.Operation2

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
IntervalOperation(IntervalOperation.IntervalOpType opType, Expression left, Expression right)
IntervalOperation(IntervalOperation.IntervalOpType opType, Expression left, Expression right, TypeInfo forcedType)

Method Summary

Modifier and Type	Method	Description
private Value	getDateTimeWithInterval(SessionLocal session, Value l, Value r, int lType, int rType)
(package private) static StringBuilder	getForcedTypeSQL(StringBuilder builder, TypeInfo forcedType)
private void	getInnerSQL2(StringBuilder builder, int sqlFlags)
private char	getOperationToken()
private long	getTimeWithInterval(Value r, long nanos)
StringBuilder	getUnenclosedSQL(StringBuilder builder, int sqlFlags)	Get the SQL statement of this expression.
Value	getValue(SessionLocal session)	Return the resulting value for the current row.
private static BigInteger	nanosFromValue(SessionLocal session, Value v)
boolean	needParentheses()	Returns whether this expressions needs to be wrapped in parentheses when it is used as an argument of other expressions.
Expression	optimize(SessionLocal session)	Try to optimize the expression.

Methods inherited from class org.h2.expression.Operation2

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, 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

INTERVAL_YEAR_DIGITS

private static final int INTERVAL_YEAR_DIGITS

Number of digits enough to hold INTERVAL '999999999999999999' YEAR / INTERVAL '1' MONTH.

See Also:

• Constant Field Values

INTERVAL_DAY_DIGITS

private static final int INTERVAL_DAY_DIGITS

Number of digits enough to hold INTERVAL '999999999999999999' DAY / INTERVAL '0.000000001' SECOND.

See Also:

• Constant Field Values

INTERVAL_DIVIDE_INTERVAL_YEAR_TYPE

private static final TypeInfo INTERVAL_DIVIDE_INTERVAL_YEAR_TYPE

INTERVAL_DIVIDE_INTERVAL_DAY_TYPE

private static final TypeInfo INTERVAL_DIVIDE_INTERVAL_DAY_TYPE

opType

private final IntervalOperation.IntervalOpType opType

forcedType

private TypeInfo forcedType

Constructor Details

IntervalOperation

public IntervalOperation(IntervalOperation.IntervalOpType opType,
 Expression left,
 Expression right,
 TypeInfo forcedType)

IntervalOperation

public IntervalOperation(IntervalOperation.IntervalOpType opType,
 Expression left,
 Expression right)

Method Details

nanosFromValue

private static BigInteger nanosFromValue(SessionLocal session,
 Value v)

needParentheses

public boolean needParentheses()

Description copied from class: Expression

Returns whether this expressions needs to be wrapped in parentheses when it is used as an argument of other expressions.

Overrides:

needParentheses in class Expression

Returns:

true if it is

getUnenclosedSQL

public StringBuilder getUnenclosedSQL(StringBuilder builder,
 int sqlFlags)

Description copied from class: Expression

Get the SQL statement of this expression. This may not always be the original SQL statement, especially after optimization. Enclosing '(' and ')' are never appended.

Specified by:

getUnenclosedSQL in class Expression

Parameters:

builder - string builder

sqlFlags - formatting flags

Returns:

the specified string builder

getInnerSQL2

private void getInnerSQL2(StringBuilder builder,
 int sqlFlags)

getForcedTypeSQL

static StringBuilder getForcedTypeSQL(StringBuilder builder,
 TypeInfo forcedType)

getOperationToken

private char getOperationToken()

getValue

public Value getValue(SessionLocal session)

Description copied from class: Expression

Return the resulting value for the current row.

Specified by:

getValue in class Expression

Parameters:

session - the session

Returns:

the result

getDateTimeWithInterval

private Value getDateTimeWithInterval(SessionLocal session,
 Value l,
 Value r,
 int lType,
 int rType)

getTimeWithInterval

private long getTimeWithInterval(Value r,
 long nanos)

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