Uses of Class
org.apache.qpid.server.query.engine.parsing.expression.function.AbstractFunctionExpression

Packages that use AbstractFunctionExpression

Package	Description
org.apache.qpid.server.query.engine.parsing.expression.function.aggregation
org.apache.qpid.server.query.engine.parsing.expression.function.datetime
org.apache.qpid.server.query.engine.parsing.expression.function.nulls
org.apache.qpid.server.query.engine.parsing.expression.function.numeric
org.apache.qpid.server.query.engine.parsing.expression.function.string
org.apache.qpid.server.query.engine.validation

Uses of AbstractFunctionExpression in org.apache.qpid.server.query.engine.parsing.expression.function.aggregation

Subclasses of AbstractFunctionExpression in org.apache.qpid.server.query.engine.parsing.expression.function.aggregation

Modifier and Type	Class	Description
class	AbstractAggregationExpression<T,R>	Parent for aggregation function classes
class	AvgExpression<T>	The AVG() function returns the average value of a numeric collection.
class	CountExpression<T>	The COUNT() function returns the number of items that matches a specified criterion.
class	MaxExpression<T,R extends java.lang.Comparable<R>>	The MAX() function returns the maximum value of a collection.
class	MinExpression<T,R>	The MIN() function returns the minimum value of a collection.
class	SumExpression<T>	The SUM() function returns the total sum of a numeric collection.

Uses of AbstractFunctionExpression in org.apache.qpid.server.query.engine.parsing.expression.function.datetime

Subclasses of AbstractFunctionExpression in org.apache.qpid.server.query.engine.parsing.expression.function.datetime

Modifier and Type	Class	Description
class	CurrentTimestampExpression<T>	The CURRENT_TIMESTAMP() function returns current date and time.
class	DateAddExpression<T,R>	The DATEADD() function adds a time/date interval to a date and returns the date.
class	DateDiffExpression<T,R>	The DATEDIFF() function returns the number of time units between two date values.
class	DateExpression<T,R>	The DATE() function extracts the date part from a datetime expression.
class	ExtractExpression<T,R>	The EXTRACT() function extracts a part from a given date.

Uses of AbstractFunctionExpression in org.apache.qpid.server.query.engine.parsing.expression.function.nulls

Subclasses of AbstractFunctionExpression in org.apache.qpid.server.query.engine.parsing.expression.function.nulls

Modifier and Type	Class	Description
class	CoalesceExpression<T,R>	The COALESCE() function returns the first non-null value in a list.

Uses of AbstractFunctionExpression in org.apache.qpid.server.query.engine.parsing.expression.function.numeric

Subclasses of AbstractFunctionExpression in org.apache.qpid.server.query.engine.parsing.expression.function.numeric

Modifier and Type	Class	Description
class	AbsExpression<T>	ABS returns the absolute value of a number.
class	RoundExpression<T>	ROUND takes a numeric parameter and rounds it to the specified number of decimal places.
class	TruncExpression<T>	TRUNC takes a numeric parameter and truncates it to the specified number of decimal places.

Uses of AbstractFunctionExpression in org.apache.qpid.server.query.engine.parsing.expression.function.string

Subclasses of AbstractFunctionExpression in org.apache.qpid.server.query.engine.parsing.expression.function.string

Modifier and Type	Class	Description
class	ConcatExpression<T,R>	CONCAT takes a variable number of arguments and concatenates them into a single string.
class	LeftTrimExpression<T,R>	LTRIM takes a string parameter and removes leading spaces from it.
class	LengthExpression<T,R>	LENGTH takes a string parameter and returns its length.
class	LowerExpression<T,R>	LOWER takes a string parameter and converts it to lower case.
class	PositionExpression<T,R>	POSITION takes a search pattern and a source string as parameters and returns the position of the first occurrence of a pattern in a source string.
class	ReplaceExpression<T,R>	REPLACE takes a source parameter, a pattern parameter and a replacement parameter.
class	RightTrimExpression<T,R>	RTRIM takes a string parameter and removes trailing spaces from it.
class	SubstringExpression<T,R>	SUBSTRING takes a source parameter, a start index parameter and optional length parameter.
class	TrimExpression<T,R>	TRIM takes a string parameter and removes both leading and trailing spaces from it.
class	UpperExpression<T,R>	UPPER takes a string parameter and converts it to upper case.

Uses of AbstractFunctionExpression in org.apache.qpid.server.query.engine.validation

Methods in org.apache.qpid.server.query.engine.validation with parameters of type AbstractFunctionExpression

Modifier and Type	Method	Description
static <T,R> void	FunctionParametersValidator.requireMaxParameters(int size, java.util.List<ExpressionNode<T,?>> args, AbstractFunctionExpression<T,R> expression)	Validates that argument list doesn't exceed a maximal expected size
static <T,R> void	FunctionParametersValidator.requireMinParameters(int size, java.util.List<ExpressionNode<T,?>> args, AbstractFunctionExpression<T,R> expression)	Validates that argument list exceeds a minimal expected size
static <T,R> void	FunctionParametersValidator.requireParameters(int size, java.util.List<ExpressionNode<T,?>> args, AbstractFunctionExpression<T,R> expression)	Validates argument list size