ibis::qContinuousRange Class Reference
Simple range condition. More...
#include <qExpr.h>
Inheritance diagram for ibis::qContinuousRange:
Public Member Functions | |
| virtual const char * | colName () const |
| Returns the name of the attribute involved. | |
| virtual qContinuousRange * | dup () const |
| virtual bool | empty () const |
| Is the current range empty? | |
| void | foldBoundaries () |
| void | foldUnsignedBoundaries () |
| virtual bool | inRange (double val) const |
| Given a value, determine whether it is in the range defined. | |
| double & | leftBound () |
| virtual const double & | leftBound () const |
| The lower bound of the range. | |
| COMPARE & | leftOperator () |
| COMPARE | leftOperator () const |
| bool | operator< (const qContinuousRange &y) const |
| The operator< for ibis::qContinuousRange. | |
| virtual void | print (std::ostream &) const |
| Print out the node in the string form. | |
| virtual void | printRange (std::ostream &out) const |
| Print out the attribute name and the constants involved in the range expressions. | |
| qContinuousRange (const char *prop, COMPARE op, double val) | |
| Construct a one-side range expression. | |
| qContinuousRange (double lv, COMPARE lop, const char *prop, COMPARE rop, double rv) | |
| Construct a range expression from double-precision boundaries. | |
| qContinuousRange (const qContinuousRange &rhs) | |
| Copy constructor. | |
| qContinuousRange (const char *col, COMPARE op, uint32_t val) | |
| Construct a range expression with an integer boundary. | |
| qContinuousRange (const char *lstr, COMPARE lop, const char *prop, COMPARE rop, const char *rstr) | |
| Construct a range expression from strings. | |
| qContinuousRange () | |
| Construct an empty range expression. | |
| virtual void | restrictRange (double left, double right) |
| Reduce the range to be no more than [left, right]. | |
| double & | rightBound () |
| virtual const double & | rightBound () const |
| The upper bound of the range. | |
| COMPARE & | rightOperator () |
| COMPARE | rightOperator () const |
Friends | |
| void | ibis::qExpr::simplify (ibis::qExpr *&) |
Detailed Description
Simple range condition.It is implemented as a derived class of qExpr. Possible range operator are defined in ibis::qExpr::COMPARE. It is designed to expression equality conditions, one-sided range conditions and two-sided range conditions.
///
/// /* an equality expression */
/// ibis::qExpr *expr = new ibis::qContinuousRange("a", ibis::qExpr::OP_EQ, 5.0);
/// /* a one-sided range expression */
/// ibis::qExpr *expr = new ibis::qContinuousRange("a", ibis::qExpr::OP_GE, 1.3);
/// /* a two-sided range expression */
/// ibis::qExpr *expr = new ibis::qContinuousRange(3.6, ibis::qExpr::OP_LE,
/// "a", ibis::qExpr::OP_LT, 4.7);
///
/// Member Function Documentation
| bool ibis::qContinuousRange::inRange | ( | double | val | ) | const [inline, virtual] |
Given a value, determine whether it is in the range defined.
Return true if it is, return false, otherwise.
Implements ibis::qRange.
Referenced by ibis::qExpr::simplify().
| void ibis::qContinuousRange::printRange | ( | std::ostream & | out | ) | const [virtual] |
Print out the attribute name and the constants involved in the range expressions.
Only print something is the node is a qRange.
Reimplemented from ibis::qExpr.
References ibis::qExpr::getLeft(), ibis::qExpr::getRight(), and ibis::qExpr::printRange().
The documentation for this class was generated from the following files:
- qExpr.h
- qExpr.cpp
