tmudr::CardinalityConstraintInfo Class Reference

A cardinality constraint. More...

#include <sqludr.h>

Inheritance diagram for tmudr::CardinalityConstraintInfo:

Public Member Functions
	CardinalityConstraintInfo (long minNumRows=0, long maxNumRows=-1)
long	getMinNumRows () const
long	getMaxNumRows () const

---

Detailed Description

A cardinality constraint.

Upper and/or lower bounds for the cardinality of a table. Note that unlike cardinality estimates, this is a hard constraint that must be followed by the table, otherwise incorrect results and errors may occur.

---

Constructor & Destructor Documentation

CardinalityConstraintInfo::CardinalityConstraintInfo	(	long	minNumRows = 0,
		long	maxNumRows = -1
	)

Construct a new cardinality constraint.

A cardinality constraint allows to specify a lower and/or an upper limit for the number of rows in a table.

Parameters:

	minNumRows	The minimum number of rows in the table, 0 or a positive number.
	maxNumRows	The maximum number of rows in the table, or -1 if there is no upper bound. If it is not -1, maxNumRows must be greater or equal minNumRows.

Exceptions:

UDRException

---

Member Function Documentation

long CardinalityConstraintInfo::getMaxNumRows

(

)

const

Return the maximum number of rows in a table.

Returns:

Maximum number of rows or -1 if there is no upper bound.

long CardinalityConstraintInfo::getMinNumRows

(

)

const

Return the minimum number of rows in a table.

Returns:

Minimum number of rows (0 or a positive number).

---

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

• sqludr.h
• sqludr.cpp