Class representing a scalar UDF in select expression. More...

#include <ExprUDFNode.h>

Inheritance diagram for casacore::TableExprUDFNode:

Public Member Functions
	TableExprUDFNode (UDFBase *udf, const Table &, const TableExprNodeSet &source)
	Constructor. More...

virtual	~TableExprUDFNode ()
	Destructor. More...

Bool	isAggregate () const
	Is the UDF an aggregate function? More...

virtual void	getAggrNodes (std::vector< TableExprNodeRep * > &aggr)
	Get the nodes representing an aggregate function. More...

virtual void	getColumnNodes (std::vector< TableExprNodeRep * > &cols)
	Get the nodes representing a table column. More...

virtual void	disableApplySelection ()
	Do not apply the selection. More...

virtual void	applySelection (const Vector< rownr_t > &rownrs)
	If needed, let the UDF re-create column objects for a selection of rows. More...

CountedPtr < TableExprGroupFuncBase >	makeGroupAggrFunc ()
	UDFs do not need a TableExprGroupFuncBase, so TableExprGroupNull is returned. More...

virtual Bool	getBool (const TableExprId &id)
	Functions to get the desired result of a function. More...

virtual Int64	getInt (const TableExprId &id)

virtual Double	getDouble (const TableExprId &id)

virtual DComplex	getDComplex (const TableExprId &id)

virtual String	getString (const TableExprId &id)

virtual TaqlRegex	getRegex (const TableExprId &id)

virtual MVTime	getDate (const TableExprId &id)

Public Member Functions inherited from casacore::TableExprNodeMulti
	TableExprNodeMulti (NodeDataType, ValueType, OperType, const TableExprNodeRep &source)
	Constructor. More...

virtual	~TableExprNodeMulti ()
	Destructor. More...

virtual void	show (ostream &, uInt indent) const
	Show the expression tree. More...

const std::vector< TENShPtr > &	getChildren () const
	Get the child nodes. More...

Public Member Functions inherited from casacore::TableExprNodeRep
	TableExprNodeRep (NodeDataType, ValueType, OperType, ArgType, ExprType, Int ndim, const IPosition &shape, const Table &table)
	Construct a node. More...

	TableExprNodeRep (NodeDataType, ValueType, OperType, const Table &)
	This constructor is called from the derived TableExprNodeRep. More...

	TableExprNodeRep (const TableExprNodeRep &)
	Copy constructor. More...

virtual	~TableExprNodeRep ()
	The destructor deletes all the underlying TableExprNode objects. More...

virtual Double	getUnitFactor () const
	Get the unit conversion factor. More...

void	checkAggrFuncs ()
	Throw an exception if an aggregate function is used in the expression node or its children. More...

virtual Bool	isLazyAggregate () const
	Is the aggregate function a lazy or an immediate one? The default implementation returns True (because all UDF aggregate functions have to be lazy). More...

virtual MArray< Bool >	getArrayBool (const TableExprId &id)
	Get an array value for this node in the given row. More...

virtual MArray< Int64 >	getArrayInt (const TableExprId &id)

virtual MArray< Double >	getArrayDouble (const TableExprId &id)

virtual MArray< DComplex >	getArrayDComplex (const TableExprId &id)

virtual MArray< String >	getArrayString (const TableExprId &id)

virtual MArray< MVTime >	getArrayDate (const TableExprId &id)

void	get (const TableExprId &id, Bool &value)
	General get functions for template purposes. More...

void	get (const TableExprId &id, Int64 &value)

void	get (const TableExprId &id, Double &value)

void	get (const TableExprId &id, DComplex &value)

void	get (const TableExprId &id, MVTime &value)

void	get (const TableExprId &id, String &value)

void	get (const TableExprId &id, MArray< Bool > &value)

void	get (const TableExprId &id, MArray< Int64 > &value)

void	get (const TableExprId &id, MArray< Double > &value)

void	get (const TableExprId &id, MArray< DComplex > &value)

void	get (const TableExprId &id, MArray< MVTime > &value)

void	get (const TableExprId &id, MArray< String > &value)

MArray< Bool >	getBoolAS (const TableExprId &id)
	Get a value as an array, even it it is a scalar. More...

MArray< Int64 >	getIntAS (const TableExprId &id)

MArray< Double >	getDoubleAS (const TableExprId &id)

MArray< DComplex >	getDComplexAS (const TableExprId &id)

MArray< String >	getStringAS (const TableExprId &id)

MArray< MVTime >	getDateAS (const TableExprId &id)

virtual Bool	hasBool (const TableExprId &id, Bool value)
	Does a value occur in an array or set? The default implementation tests if it is in an array. More...

virtual Bool	hasInt (const TableExprId &id, Int64 value)

virtual Bool	hasDouble (const TableExprId &id, Double value)

virtual Bool	hasDComplex (const TableExprId &id, const DComplex &value)

virtual Bool	hasString (const TableExprId &id, const String &value)

virtual Bool	hasDate (const TableExprId &id, const MVTime &value)

virtual MArray< Bool >	hasArrayBool (const TableExprId &id, const MArray< Bool > &value)

virtual MArray< Bool >	hasArrayInt (const TableExprId &id, const MArray< Int64 > &value)

virtual MArray< Bool >	hasArrayDouble (const TableExprId &id, const MArray< Double > &value)

virtual MArray< Bool >	hasArrayDComplex (const TableExprId &id, const MArray< DComplex > &value)

virtual MArray< Bool >	hasArrayString (const TableExprId &id, const MArray< String > &value)

virtual MArray< Bool >	hasArrayDate (const TableExprId &id, const MArray< MVTime > &value)

rownr_t	nrow () const
	Get the number of rows in the table associated with this expression. More...

virtual Bool	getColumnDataType (DataType &) const
	Get the data type of the column. More...

virtual Array< Bool >	getColumnBool (const Vector< rownr_t > &rownrs)
	Get the value of the expression evaluated for the entire column. More...

virtual Array< uChar >	getColumnuChar (const Vector< rownr_t > &rownrs)

virtual Array< Short >	getColumnShort (const Vector< rownr_t > &rownrs)

virtual Array< uShort >	getColumnuShort (const Vector< rownr_t > &rownrs)

virtual Array< Int >	getColumnInt (const Vector< rownr_t > &rownrs)

virtual Array< uInt >	getColumnuInt (const Vector< rownr_t > &rownrs)

virtual Array< Int64 >	getColumnInt64 (const Vector< rownr_t > &rownrs)

virtual Array< Float >	getColumnFloat (const Vector< rownr_t > &rownrs)

virtual Array< Double >	getColumnDouble (const Vector< rownr_t > &rownrs)

virtual Array< Complex >	getColumnComplex (const Vector< rownr_t > &rownrs)

virtual Array< DComplex >	getColumnDComplex (const Vector< rownr_t > &rownrs)

virtual Array< String >	getColumnString (const Vector< rownr_t > &rownrs)

virtual void	ranges (Block< TableExprRange > &)
	Convert the tree to a number of range vectors which at least select the same things. More...

NodeDataType	dataType () const
	Get the data type of the derived TableExprNode object. More...

Bool	isReal () const
	Is the data type real (i.e., integer or double)? More...

ValueType	valueType () const
	Get the value type. More...

void	setValueType (ValueType vtype)
	Set the value type. More...

OperType	operType () const
	Get the operator type. More...

ExprType	exprType () const
	Get the expression type. More...

Bool	isConstant () const
	Is the expression a constant? More...

const Unit &	unit () const
	Get the unit. More...

void	setUnit (const Unit &unit)
	Set the unit. More...

const Record &	attributes () const
	Get the attributes. More...

void	setAttributes (const Record &)
	Set the attributes. More...

Int	ndim () const
	Get the fixed dimensionality (same for all rows). More...

const IPosition &	shape () const
	Get the fixed shape (same for all rows). More...

const IPosition &	shape (const TableExprId &id)
	Get the shape for the given row. More...

virtual Bool	isDefined (const TableExprId &id)
	Is the value in the given row defined? The default implementation returns True. More...

Table &	table ()
	Get table. More...

const Table &	table () const

virtual void	adaptSetUnits (const Unit &)
	Let a set node convert itself to the given unit. More...

Private Attributes
UDFBase *	itsUDF

Additional Inherited Members
Public Types inherited from casacore::TableExprNodeRep
enum	NodeDataType { NTBool, NTInt, NTDouble, NTComplex, NTString, NTRegex, NTDate, NTReal, NTDouCom, NTNumeric, NTAny }
	Define the data types of a node. More...

enum	ValueType { VTScalar, VTArray, VTRecord, VTSetElem, VTSet, VTIndex }
	Define the value types. More...

enum	OperType { OtPlus, OtMinus, OtTimes, OtDivide, OtModulo, OtBitAnd, OtBitOr, OtBitXor, OtBitNegate, OtEQ, OtGE, OtGT, OtNE, OtIN, OtAND, OtOR, OtNOT, OtMIN, OtColumn, OtField, OtLiteral, OtFunc, OtSlice, OtUndef, OtRownr, OtRandom }
	Define the operator types. More...

enum	ArgType { NoArr, ArrArr, ArrSca, ScaArr }
	Define the value types of the 2 arguments when arrays are involved. More...

enum	ExprType { Constant, Variable }
	Define (sub-)expression type. More...

Static Public Member Functions inherited from casacore::TableExprNodeMulti
static uInt	checkNumOfArg (uInt low, uInt high, const std::vector< TENShPtr > &nodes)
	Check number of arguments low <= number_of_args <= high It throws an exception if wrong number of arguments. More...

static NodeDataType	checkDT (Block< Int > &dtypeOper, NodeDataType dtIn, NodeDataType dtOut, const std::vector< TENShPtr > &nodes, Bool dateConv=True)
	Check datatype of nodes and return output type. More...

Static Public Member Functions inherited from casacore::TableExprNodeRep
static TENShPtr	replaceConstNode (const TENShPtr &node)
	Replace a node with a constant expression by node with its value. More...

static void	createRange (Block< TableExprRange > &, TableExprNodeColumn *, Double start, Double end)
	Create a range object from a column and an interval. More...

static void	createRange (Block< TableExprRange > &)
	Create a empty range object. More...

static String	typeString (NodeDataType)
	Convert a NodeDataType to a string. More...

static String	typeString (ValueType)
	Convert a ValueType to a string. More...

Protected Member Functions inherited from casacore::TableExprNodeRep
virtual const IPosition &	getShape (const TableExprId &id)
	Get the shape for the given row. More...

virtual void	convertConstChild ()
	If one of the children is a constant, convert its data type to that of the other operand (if appropriate). More...

void	checkTablePtr (const TENShPtr &node)
	Check if this node uses the same table pointer. More...

void	fillExprType (const TENShPtr &node)
	Set expression type to Variable if node is Variable. More...

Static Protected Member Functions inherited from casacore::TableExprNodeRep
static void	checkTablePtr (Table &table, const TENShPtr &node)

static void	fillExprType (ExprType &, const TENShPtr &node)

static TENShPtr	convertNode (const TENShPtr &thisNode, Bool convertConstType)
	If the node is constant, it is evaluated and replaced by the appropriate TableExprNodeConst object. More...

Protected Attributes inherited from casacore::TableExprNodeMulti
std::vector< TENShPtr >	operands_p

Protected Attributes inherited from casacore::TableExprNodeRep
Table	table_p

NodeDataType	dtype_p

ValueType	vtype_p

OperType	optype_p

ArgType	argtype_p

ExprType	exprtype_p

Int	ndim_p

IPosition	shape_p

Unit	unit_p

Record	attributes_p

Detailed Description

Class representing a scalar UDF in select expression.

Intended use:

Internal

Review Status

Reviewed By:: UNKNOWN
Date Reviewed:: before2004/08/25

Prerequisite

TableExprNodeMulti

Synopsis

This class represents a function in a table select tree. The rownumber function is represented by class TableExprNodeRownr. The rowid function is represented by class TableExprNodeRowid. The rand function is represented by class TableExprNodeRandom.

When one wants to add a function to the table selection grammar, the following has to be done: