ExprFuncNode.h

Classes

TableExprFuncNode -- Class representing a function in table select expression (full description)

class TableExprFuncNode : public TableExprNodeMulti

Types

enum FunctionType

piFUNC

eFUNC

near2FUNC

for Double or Complex returning Bool (2 is with default tolerance)

near3FUNC

nearabs2FUNC

nearabs3FUNC

sinFUNC

for Double or DComplex returning same data type

sinhFUNC

cosFUNC

coshFUNC

expFUNC

logFUNC

log10FUNC

powFUNC

squareFUNC

sqrtFUNC

conjFUNC

minFUNC

maxFUNC

normFUNC

for Double or DComplex returning Double

absFUNC

argFUNC

realFUNC

imagFUNC

asinFUNC

for Double returning Double

acosFUNC

atanFUNC

atan2FUNC

tanFUNC

tanhFUNC

signFUNC

roundFUNC

floorFUNC

ceilFUNC

fmodFUNC

complexFUNC

for Double returning DComplex

arrsumFUNC

for Double or Complex array returning scalar

arrsumsFUNC

arrproductFUNC

arrproductsFUNC

arrsumsqrFUNC

arrsumsqrsFUNC

arrminFUNC

for Double array returning Double

arrminsFUNC

arrmaxFUNC

arrmaxsFUNC

arrmeanFUNC

arrmeansFUNC

arrvarianceFUNC

arrvariancesFUNC

arrstddevFUNC

arrstddevsFUNC

arravdevFUNC

arravdevsFUNC

arrmedianFUNC

arrmediansFUNC

arrfractileFUNC

arrfractilesFUNC

anyFUNC

for Bool array returning Bool

anysFUNC

allFUNC

allsFUNC

ntrueFUNC

for Bool array returning Double

ntruesFUNC

nfalseFUNC

nfalsesFUNC

arrayFUNC

for any type returning array of that type

isnanFUNC

for Double or DComplex array returning Bool

isdefFUNC

for any array returning Bool scalar

ndimFUNC

for any array returning Double scalar

nelemFUNC

shapeFUNC

for any array returning Double array

strlengthFUNC

for String

upcaseFUNC

# returning Double

downcaseFUNC

# returning String

trimFUNC

# returning String

regexFUNC

# returning String

patternFUNC

# returning Regex

sqlpatternFUNC

# returning Regex

datetimeFUNC

# returning Regex for Date

mjdtodateFUNC

# returning Date

mjdFUNC

# returning Date

dateFUNC

# returning Double

timeFUNC

# returning Date

yearFUNC

# returning Double (in radians)

monthFUNC

# returning Double

dayFUNC

# returning Double

cmonthFUNC

# returning Double

weekdayFUNC

# returning String

cdowFUNC

# returning Double

weekFUNC

# returning String

randFUNC

# returning Double special function to select on a random number

rownrFUNC

special function to select on row number

rowidFUNC

special function to return row id (meant for GIVING)

iifFUNC

special function resembling if statement

NRFUNC

Interface

Public Members

TableExprFuncNode (FunctionType, NodeDataType, ValueType, const ValueType& source)

~TableExprFuncNode ()

Bool getBool (const TableExprId& id)

Double getDouble (const TableExprId& id)

DComplex getDComplex (const TableExprId& id)

String getString (const TableExprId& id)

Regex getRegex (const TableExprId& id)

MVTime getDate (const TableExprId& id)

static NodeDataType checkOperands (Block<Int>& dtypeOper, ValueType& resVT, Block<Int>& vtypeOper, FunctionType, PtrBlock<TableExprNodeRep*>&)

static TableExprNodeRep* fillNode (TableExprFuncNode* thisNode, PtrBlock<TableExprNodeRep*>& nodes, const Block<Int>& dtypeOper)

static void fillChildNodes (TableExprFuncNode* thisNode, PtrBlock<TableExprNodeRep*>& nodes, const Block<Int>& dtypeOper)

PtrBlock<TableExprNodeRep*> operands()

FunctionType funcType() const

NodeDataType argDataType() const

Private Members

void tryToConst()

Description

Prerequisite

• TableExprNodeMulti

Synopsis

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

• Add the function to the enum below.
• Implement the function in the get functions in ExprFuncNode(Array).cc.
• Implement the function in the checkOperands in ExprFuncNode.cc.
• Declare and define the function in ExprNode.h (for C++ binding).
• Add the function to findFunc in TableParse.cc (for TaQL).

Member Description

enum FunctionType

TableExprFuncNode (FunctionType, NodeDataType, ValueType, const ValueType& source)

~TableExprFuncNode ()

Destructor

Bool getBool (const TableExprId& id)
Double getDouble (const TableExprId& id)
DComplex getDComplex (const TableExprId& id)
String getString (const TableExprId& id)
Regex getRegex (const TableExprId& id)
MVTime getDate (const TableExprId& id)

'get' Functions to get the desired result of a function

static NodeDataType checkOperands (Block<Int>& dtypeOper, ValueType& resVT, Block<Int>& vtypeOper, FunctionType, PtrBlock<TableExprNodeRep*>&)

Check the data and value types of the operands. It sets the exptected data and value types of the operands. Set the value type of the function result and returns the data type of the function result.

static TableExprNodeRep* fillNode (TableExprFuncNode* thisNode, PtrBlock<TableExprNodeRep*>& nodes, const Block<Int>& dtypeOper)

Link the children to the node and convert the children to constants if possible. Also convert the node to constant if possible.

static void fillChildNodes (TableExprFuncNode* thisNode, PtrBlock<TableExprNodeRep*>& nodes, const Block<Int>& dtypeOper)

Link the children to the node and convert the children to constants if possible.

PtrBlock<TableExprNodeRep*> operands()
FunctionType funcType() const
NodeDataType argDataType() const

Some functions to be used by TableExprNodeFuncArray.

void tryToConst()