UnaryPrefixOperatorConversion (Apache Calcite API)

java.lang.Object
- org.apache.calcite.adapter.druid.UnaryPrefixOperatorConversion

All Implemented Interfaces:

DruidSqlOperatorConverter
```
public class UnaryPrefixOperatorConversion
extends java.lang.Object
implements DruidSqlOperatorConverter
```
Unary prefix Operator conversion class used to convert expression like Unary NOT and Minus

Field Summary

Fields
Modifier and Type Field Description

private java.lang.String druidOperator

private SqlOperator operator

Constructor Summary

Constructors
Constructor Description

UnaryPrefixOperatorConversion(SqlOperator operator, java.lang.String druidOperator)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`SqlOperator`	`calciteOperator()`	Returns the calcite SQL operator corresponding to Druid operator.
`java.lang.String`	`toDruidExpression(RexNode rexNode, RelDataType rowType, DruidQuery druidQuery)`	Translate rexNode to valid Druid expression.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - operator
```
private final SqlOperator operator
```
  - druidOperator
```
private final java.lang.String druidOperator
```
- Constructor Detail
  - UnaryPrefixOperatorConversion
```
public UnaryPrefixOperatorConversion(SqlOperator operator,
                                     java.lang.String druidOperator)
```
- Method Detail
  - calciteOperator
```
public SqlOperator calciteOperator()
```
    Description copied from interface: DruidSqlOperatorConverter
    
    Returns the calcite SQL operator corresponding to Druid operator.
    
    Specified by:
    
    calciteOperator in interface DruidSqlOperatorConverter
    
    Returns:
    
    operator
  - toDruidExpression
```
public java.lang.String toDruidExpression(RexNode rexNode,
                                          RelDataType rowType,
                                          DruidQuery druidQuery)
```
    Description copied from interface: DruidSqlOperatorConverter
    
    Translate rexNode to valid Druid expression.
    
    Specified by:
    
    toDruidExpression in interface DruidSqlOperatorConverter
    
    Parameters:
    
    rexNode - rexNode to translate to Druid expression
    
    rowType - row type associated with rexNode
    
    druidQuery - druid query used to figure out configs/fields related like timeZone
    
    Returns:
    
    valid Druid expression or null if it can not convert the rexNode