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casacore::TableExprNodeSetOptUSet< T > Class Template Reference
tables package (libcasa_tables) » TaQL_module » TaQL_module_internal_classes

An optimized representation of a discrete selection set. More...

`#include <ExprNodeSetOpt.h>`

## Public Member Functions

| TableExprNodeSetOptUSet (const TableExprNodeRep &orig, const Array< T > &)
| Construct an empty set.
void | show (ostream &os, uInt indent) const override
| Show the node.
Int64 | find (T value) const override
| Where does a value occur in the set?
Public Member Functions inherited from casacore::TableExprNodeSetOptBase
| TableExprNodeSetOptBase (const TableExprNodeRep &orig)
Bool | contains (const TableExprId &id, Int64 value) override
| Does the set contain the given value?
Bool | contains (const TableExprId &id, Double value) override
Bool | contains (const TableExprId &id, String value) override
MArray< Bool > | contains (const TableExprId &id, const MArray< Int64 > &value) override
| Tell for each array value if the set contains that value.
MArray< Bool > | contains (const TableExprId &id, const MArray< Double > &value) override
MArray< Bool > | contains (const TableExprId &id, const MArray< String > &value) override
Public Member Functions inherited from casacore::TableExprNodeRep
| TableExprNodeRep (NodeDataType, ValueType, OperType, ArgType, ExprType, Int ndim, const IPosition &shape)
| Construct a node.
| TableExprNodeRep (NodeDataType, ValueType, OperType, ExprType)
| This constructor is called from the derived TableExprNodeRep.
| TableExprNodeRep (const TableExprNodeRep &)=default
| Copy constructor.
TableExprNodeRep & | operator= (const TableExprNodeRep &)=delete
| Assign to a TableExprNodeRep cannot be done.
virtual | ~TableExprNodeRep ()=default
| The destructor deletes all the underlying TableExprNode objects.
virtual Bool | isAggregate () const
| Is the node an aggegation node.
virtual TableExprInfo | getTableInfo () const
| Get the table info.
virtual void | optimize ()
| Try to optimize the node (meant for the right hand of the IN operator).
virtual void | disableApplySelection ()
| Do not apply the selection.
virtual void | applySelection (const Vector< rownr_t > &rownrs)
| Re-create the column object for a selection of rows.
virtual Double | getUnitFactor () const
| Get the unit conversion factor.
virtual void | flattenTree (std::vector< TableExprNodeRep * > &)
| Flatten the node tree by adding the node and its children to the vector.
virtual std::shared_ptr< TableExprGroupFuncBase > | makeGroupAggrFunc ()
| Create the correct immediate aggregate function object.
virtual Bool | isLazyAggregate () const
| Is the aggregate function a lazy or an immediate one?
virtual Bool | getBool (const TableExprId &id)
| Get a scalar value for this node in the given row.
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)
virtual MArray< Bool > | getArrayBool (const TableExprId &id)
| Get an array value for this node in the given row.
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.
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.
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)
rownr_t | nrow ()
| Get the number of rows in the table associated with this expression.
virtual Bool | getColumnDataType (DataType &) const
| Get the data type of the column.
virtual Array< Bool > | getColumnBool (const Vector< rownr_t > &rownrs)
| Get the value of the expression evaluated for the entire column.
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.
NodeDataType | dataType () const
| Get the data type of the derived TableExprNode object.
Bool | isReal () const
| Is the data type real (i.e., integer or double)?
ValueType | valueType () const
| Get the value type.
void | setValueType (ValueType vtype)
| Set the value type.
OperType | operType () const
| Get the operator type.
ExprType | exprType () const
| Get the expression type.
Bool | isConstant () const
| Is the expression a constant?
const Unit & | unit () const
| Get the unit.
void | setUnit (const Unit &unit)
| Set the unit.
const Record & | attributes () const
| Get the attributes.
void | setAttributes (const Record &)
| Set the attributes.
Int | ndim () const
| Get the fixed dimensionality (same for all rows).
const IPosition & | shape () const
| Get the fixed shape (same for all rows).
const IPosition & | shape (const TableExprId &id)
| Get the shape for the given row.
virtual Bool | isDefined (const TableExprId &id)
| Is the value in the given row defined?
virtual void | adaptSetUnits (const Unit &)
| Let a set node convert itself to the given unit.

## Private Member Functions

virtual Int64 | find (Int64 value) const
| Explicitly hide base function to prevent warning.
virtual Int64 | find (Double value) const
| Explicitly hide base function to prevent warning.
virtual Int64 | find (String value) const
| Explicitly hide base function to prevent warning.

## Private Attributes

std::unordered_map< T, Int64 > | itsMap

## 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::TableExprNodeRep
static TENShPtr | replaceConstNode (const TENShPtr &node)
| Replace a node with a constant expression by node with its value.
static void | createRange (Block< TableExprRange > &, TableExprNodeColumn *, Double start, Double end)
| Create a range object from a column and an interval.
static void | createRange (Block< TableExprRange > &)
| Create a empty range object.
static String | typeString (NodeDataType)
| Convert a NodeDataType to a string.
static String | typeString (ValueType)
| Convert a ValueType to a string.
Protected Member Functions inherited from casacore::TableExprNodeRep
virtual const IPosition & | getShape (const TableExprId &id)
| Get the shape for the given row.
void | fillExprType (const TableExprNodeRep *node)
| Set expression type to Variable if node is Variable.
Static Protected Member Functions inherited from casacore::TableExprNodeRep
static TENShPtr | convertNode (const TENShPtr &thisNode, Bool convertConstType)
| If the node is constant, it is evaluated and replaced by the appropriate TableExprNodeConst object.
Protected Attributes inherited from casacore::TableExprNodeRep
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

template<typename T>
class casacore::TableExprNodeSetOptUSet< T >

An optimized representation of a discrete selection set.

### Intended use:

Internal

### Review Status

Reviewed By:
  Mordante
Date Reviewed:
  2022/11/08
Test programs:
  tExprNodeSetOpt

### Prerequisite

- TableExprNodeSet

### Synopsis

This templated class is an optimized representation of an constant integer or string array set used by the IN operator. If applicable, TableExprLogicNode instantiates an object of this class.
The representation is a std::unordered_map containing the array values and the index in the array.
Note that a std::unordered_map is used instead of std::map because its hashing mechanism makes it faster.

Definition at line 124 of file ExprNodeSetOpt.h.

## Constructor & Destructor Documentation

## TableExprNodeSetOptUSet()

template<typename T>

casacore::TableExprNodeSetOptUSet< T >::TableExprNodeSetOptUSet | ( | const TableExprNodeRep & | orig,
|  | const Array< T > & | )

Construct an empty set.

## Member Function Documentation

## find() [1/4]

template<typename T>

virtual Int64 casacore::TableExprNodeSetOptBase::find | ( | Double | value | ) | const

private virtual

Explicitly hide base function to prevent warning.

Reimplemented from casacore::TableExprNodeSetOptBase.

## find() [2/4]

template<typename T>

virtual Int64 casacore::TableExprNodeSetOptBase::find | ( | Int64 | value | ) | const

private virtual

Explicitly hide base function to prevent warning.

Reimplemented from casacore::TableExprNodeSetOptBase.

## find() [3/4]

template<typename T>

virtual Int64 casacore::TableExprNodeSetOptBase::find | ( | String | value | ) | const

private virtual

Explicitly hide base function to prevent warning.

Reimplemented from casacore::TableExprNodeSetOptBase.

## find() [4/4]

template<typename T>

Int64 casacore::TableExprNodeSetOptUSet< T >::find | ( | T | value | ) | const

override

Where does a value occur in the set?

-1 is no match.

References casacore::NewDelAllocator< T >::value.

## show()

template<typename T>

void casacore::TableExprNodeSetOptUSet< T >::show | ( | ostream & | os,
|  | uInt | indent ) const

override virtual

Show the node.

Reimplemented from casacore::TableExprNodeRep.

## Member Data Documentation

## itsMap

template<typename T>

std::unordered_map<T,Int64> casacore::TableExprNodeSetOptUSet< T >::itsMap

private

Definition at line 137 of file ExprNodeSetOpt.h.

The documentation for this class was generated from the following file:

- tables/TaQL/ExprNodeSetOpt.h