Package org.h2.expression.function

Class DateTimeFunction

java.lang.Object

org.h2.expression.Expression

org.h2.expression.Operation1_2

org.h2.expression.function.Function1_2

org.h2.expression.function.DateTimeFunction

All Implemented Interfaces:

NamedExpression, HasSQL, Typed

public final class DateTimeFunction
extends Function1_2

A date-time function.

Field Summary

Fields

Modifier and Type	Field	Description
static int	CENTURY	Century.
static int	DATE_TRUNC	DATE_TRUNC() (non-standard).
static int	DATEADD	DATEADD() (non-standard).
static int	DATEDIFF	DATEDIFF() (non-standard).
static int	DAY	Day of month.
static int	DAY_OF_WEEK	Day of week (locale-specific).
static int	DAY_OF_YEAR	Day of year.
static int	DECADE	Decade.
static int	DOW	Day of week (locale-specific) for PostgreSQL compatibility.
static int	EPOCH	Epoch.
static int	EXTRACT	EXTRACT().
static int	HOUR	Hour.
static int	ISO_DAY_OF_WEEK	ISO day of week.
static int	ISO_WEEK	ISO week.
static int	ISO_WEEK_YEAR	ISO week-based year.
static int	LAST_DAY	LAST_DAY() (non-standard);
static int	MICROSECOND	Microsecond.
static int	MILLENNIUM	Millennium.
static int	MILLISECOND	Millisecond.
static int	MINUTE	Minute.
static int	MONTH	Month.
static int	NANOSECOND	Nanosecond.
static int	QUARTER	Quarter.
static int	SECOND	Second.
static int	TIMEZONE_HOUR	Time zone hour.
static int	TIMEZONE_MINUTE	Time zone minute.
static int	TIMEZONE_SECOND	Time zone second.
static int	WEEK	Week (locale-specific).
static int	WEEK_YEAR	Week-based year (locale-specific).
static int	YEAR	Year.

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
DateTimeFunction(int function, int field, Expression arg1, Expression arg2)

Method Summary

Modifier and Type	Method	Description
static Value	dateadd(SessionLocal session, int field, long count, Value v)	DATEADD function.
static int	getField(java.lang.String name)	Get date-time field for the specified name.
static java.lang.String	getFieldName(int field)	Get the name of the specified date-time field.
java.lang.String	getName()	Get the name.
java.lang.StringBuilder	getUnenclosedSQL(java.lang.StringBuilder builder, int sqlFlags)	Get the SQL statement of this expression.
Value	getValue(SessionLocal session, Value v1, Value v2)	Returns the value of this function.
Expression	optimize(SessionLocal session)	Try to optimize the expression.

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

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, getTypeIfStaticallyKnown, 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

EXTRACT

public static final int EXTRACT

EXTRACT().

See Also:

Constant Field Values

DATE_TRUNC

public static final int DATE_TRUNC

DATE_TRUNC() (non-standard).

See Also:

Constant Field Values

DATEADD

public static final int DATEADD

DATEADD() (non-standard).

See Also:

Constant Field Values

DATEDIFF

public static final int DATEDIFF

DATEDIFF() (non-standard).

See Also:

Constant Field Values

LAST_DAY

public static final int LAST_DAY

LAST_DAY() (non-standard);

See Also:

Constant Field Values

YEAR

public static final int YEAR

Year.

See Also:

Constant Field Values

MONTH

public static final int MONTH

Month.

See Also:

Constant Field Values

DAY

public static final int DAY

Day of month.

See Also:

Constant Field Values

HOUR

public static final int HOUR

Hour.

See Also:

Constant Field Values

MINUTE

public static final int MINUTE

Minute.

See Also:

Constant Field Values

SECOND

public static final int SECOND

Second.

See Also:

Constant Field Values

TIMEZONE_HOUR

public static final int TIMEZONE_HOUR

Time zone hour.

See Also:

Constant Field Values

TIMEZONE_MINUTE

public static final int TIMEZONE_MINUTE

Time zone minute.

See Also:

Constant Field Values

TIMEZONE_SECOND

public static final int TIMEZONE_SECOND

Time zone second.

See Also:

Constant Field Values

MILLENNIUM

public static final int MILLENNIUM

Millennium.

See Also:

Constant Field Values

CENTURY

public static final int CENTURY

Century.

See Also:

Constant Field Values

DECADE

public static final int DECADE

Decade.

See Also:

Constant Field Values

QUARTER

public static final int QUARTER

Quarter.

See Also:

Constant Field Values

MILLISECOND

public static final int MILLISECOND

Millisecond.

See Also:

Constant Field Values

MICROSECOND

public static final int MICROSECOND

Microsecond.

See Also:

Constant Field Values

NANOSECOND

public static final int NANOSECOND

Nanosecond.

See Also:

Constant Field Values

DAY_OF_YEAR

public static final int DAY_OF_YEAR

Day of year.

See Also:

Constant Field Values

ISO_DAY_OF_WEEK

public static final int ISO_DAY_OF_WEEK

ISO day of week.

See Also:

Constant Field Values

ISO_WEEK

public static final int ISO_WEEK

ISO week.

See Also:

Constant Field Values

ISO_WEEK_YEAR

public static final int ISO_WEEK_YEAR

ISO week-based year.

See Also:

Constant Field Values

DAY_OF_WEEK

public static final int DAY_OF_WEEK

Day of week (locale-specific).

See Also:

Constant Field Values

WEEK

public static final int WEEK

Week (locale-specific).

See Also:

Constant Field Values

WEEK_YEAR

public static final int WEEK_YEAR

Week-based year (locale-specific).

See Also:

Constant Field Values

EPOCH

public static final int EPOCH

Epoch.

See Also:

Constant Field Values

DOW

public static final int DOW

Day of week (locale-specific) for PostgreSQL compatibility.

See Also:

Constant Field Values

Constructor Detail

DateTimeFunction

public DateTimeFunction(int function,
                        int field,
                        Expression arg1,
                        Expression arg2)

Method Detail

getField

public static int getField(java.lang.String name)

Get date-time field for the specified name.

Parameters:

name - the name

Returns:

the date-time field

Throws:

DbException - on unknown field name

getFieldName

public static java.lang.String getFieldName(int field)

Get the name of the specified date-time field.

Parameters:

field - the date-time field

Returns:

the name of the specified field

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

dateadd

public static Value dateadd(SessionLocal session,
                            int field,
                            long count,
                            Value v)

DATEADD function.

Parameters:

session - the session

field - the date-time field

count - count to add

v - value to add to

Returns:

result

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

getUnenclosedSQL

public java.lang.StringBuilder getUnenclosedSQL(java.lang.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.

Overrides:

getUnenclosedSQL in class Function1_2

Parameters:

builder - string builder

sqlFlags - formatting flags

Returns:

the specified string builder

getName

public java.lang.String getName()

Description copied from interface: NamedExpression

Get the name.

Returns:

the name in uppercase