Enclosing class:

Operator
```
public static interface Operator.SelectivityEstimators
```
Names of several functions predefined in PostgreSQL for estimating the selectivity of operators in restriction clauses or joins.

Field Summary

Fields
Modifier and Type	Field	Description
`static String`	`AREAJOINSEL`	A join-selectivity estimator suitable for an operator doing 2-D area-based comparisons.
`static String`	`CONTJOINSEL`	A join-selectivity estimator suitable for an operator doing 2-D containment-based comparisons.
`static String`	`EQJOINSEL`	A join-selectivity estimator suitable for an operator with rather high selectivity typical of an operator like `=`.
`static String`	`EQSEL`	A restriction-selectivity estimator suitable for an operator with rather high selectivity typical of an operator like `=`.
`static String`	`MATCHINGJOINSEL`	A join-selectivity estimator suitable for an operator somewhat less strict than a typical `=` operator.
`static String`	`MATCHINGSEL`	A restriction-selectivity estimator suitable for an operator somewhat less strict than a typical `=` operator.
`static String`	`NEQJOINSEL`	A join-selectivity estimator suitable for an operator with rather low selectivity typical of an operator like `<>`.
`static String`	`NEQSEL`	A restriction-selectivity estimator suitable for an operator with rather low selectivity typical of an operator like `<>`.
`static String`	`POSITIONJOINSEL`	A join-selectivity estimator suitable for an operator doing 2-D position-based comparisons.
`static String`	`SCALARGEJOINSEL`	A join-selectivity estimator suitable for an operator with selectivity typical of an operator like `>=`.
`static String`	`SCALARGESEL`	A restriction-selectivity estimator suitable for an operator with selectivity typical of an operator like `>=`.
`static String`	`SCALARGTJOINSEL`	A join-selectivity estimator suitable for an operator with selectivity typical of an operator like `>`.
`static String`	`SCALARGTSEL`	A restriction-selectivity estimator suitable for an operator with selectivity typical of an operator like `>`.
`static String`	`SCALARLEJOINSEL`	A join-selectivity estimator suitable for an operator with selectivity typical of an operator like `<=`.
`static String`	`SCALARLESEL`	A restriction-selectivity estimator suitable for an operator with selectivity typical of an operator like `<=`.
`static String`	`SCALARLTJOINSEL`	A join-selectivity estimator suitable for an operator with selectivity typical of an operator like `<`.
`static String`	`SCALARLTSEL`	A restriction-selectivity estimator suitable for an operator with selectivity typical of an operator like `<`.

- Field Detail
  - EQSEL
```
static final String EQSEL
```
    A restriction-selectivity estimator suitable for an operator with rather high selectivity typical of an operator like =.
    
    See Also:
    
    Constant Field Values
  - MATCHINGSEL
```
static final String MATCHINGSEL
```
    A restriction-selectivity estimator suitable for an operator somewhat less strict than a typical = operator.
    
    See Also:
    
    Constant Field Values
  - NEQSEL
```
static final String NEQSEL
```
    A restriction-selectivity estimator suitable for an operator with rather low selectivity typical of an operator like <>.
    
    See Also:
    
    Constant Field Values
  - SCALARLTSEL
```
static final String SCALARLTSEL
```
    A restriction-selectivity estimator suitable for an operator with selectivity typical of an operator like <.
    
    See Also:
    
    Constant Field Values
  - SCALARLESEL
```
static final String SCALARLESEL
```
    A restriction-selectivity estimator suitable for an operator with selectivity typical of an operator like <=.
    
    See Also:
    
    Constant Field Values
  - SCALARGTSEL
```
static final String SCALARGTSEL
```
    A restriction-selectivity estimator suitable for an operator with selectivity typical of an operator like >.
    
    See Also:
    
    Constant Field Values
  - SCALARGESEL
```
static final String SCALARGESEL
```
    A restriction-selectivity estimator suitable for an operator with selectivity typical of an operator like >=.
    
    See Also:
    
    Constant Field Values
  - EQJOINSEL
```
static final String EQJOINSEL
```
    A join-selectivity estimator suitable for an operator with rather high selectivity typical of an operator like =.
    
    See Also:
    
    Constant Field Values
  - MATCHINGJOINSEL
```
static final String MATCHINGJOINSEL
```
    A join-selectivity estimator suitable for an operator somewhat less strict than a typical = operator.
    
    See Also:
    
    Constant Field Values
  - NEQJOINSEL
```
static final String NEQJOINSEL
```
    A join-selectivity estimator suitable for an operator with rather low selectivity typical of an operator like <>.
    
    See Also:
    
    Constant Field Values
  - SCALARLTJOINSEL
```
static final String SCALARLTJOINSEL
```
    A join-selectivity estimator suitable for an operator with selectivity typical of an operator like <.
    
    See Also:
    
    Constant Field Values
  - SCALARLEJOINSEL
```
static final String SCALARLEJOINSEL
```
    A join-selectivity estimator suitable for an operator with selectivity typical of an operator like <=.
    
    See Also:
    
    Constant Field Values
  - SCALARGTJOINSEL
```
static final String SCALARGTJOINSEL
```
    A join-selectivity estimator suitable for an operator with selectivity typical of an operator like >.
    
    See Also:
    
    Constant Field Values
  - SCALARGEJOINSEL
```
static final String SCALARGEJOINSEL
```
    A join-selectivity estimator suitable for an operator with selectivity typical of an operator like >=.
    
    See Also:
    
    Constant Field Values
  - AREAJOINSEL
```
static final String AREAJOINSEL
```
    A join-selectivity estimator suitable for an operator doing 2-D area-based comparisons.
    
    See Also:
    
    Constant Field Values
  - POSITIONJOINSEL
```
static final String POSITIONJOINSEL
```
    A join-selectivity estimator suitable for an operator doing 2-D position-based comparisons.
    
    See Also:
    
    Constant Field Values
  - CONTJOINSEL
```
static final String CONTJOINSEL
```
    A join-selectivity estimator suitable for an operator doing 2-D containment-based comparisons.
    
    See Also:
    
    Constant Field Values

Interface Operator.SelectivityEstimators

Field Summary

Field Detail

EQSEL

MATCHINGSEL

NEQSEL

SCALARLTSEL

SCALARLESEL

SCALARGTSEL

SCALARGESEL

EQJOINSEL

MATCHINGJOINSEL

NEQJOINSEL

SCALARLTJOINSEL

SCALARLEJOINSEL

SCALARGTJOINSEL

SCALARGEJOINSEL

AREAJOINSEL

POSITIONJOINSEL

CONTJOINSEL