ValueExpression (Yamcs :: Core 5.3.2 API)

java.lang.Object
- org.yamcs.yarch.streamsql.Expression
- - org.yamcs.yarch.streamsql.ValueExpression

```
public class ValueExpression
extends Expression
```
This represents a constant value coming from some sql expression for example: select 3 from x

Field Summary
- Fields inherited from class org.yamcs.yarch.streamsql.Expression
  children, constantValue, hasAggregates, inputDef, type

Constructor Summary

Constructors
Constructor Description

ValueExpression(Object value, DataType type)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`CompiledExpression`	`compile()`
`void`	`doBind()`
`void`	`fillCode_getValueReturn(StringBuilder code)`
`String`	`toString()`

Methods inherited from class org.yamcs.yarch.streamsql.Expression
addFilter, bind, collectAggregates, collectRequiredInputs, fillCode_Constructor, fillCode_Declarations, fillCode_getValueBody, fillCode_InputDefVars, getColumnName, getConstantValue, getType, isAggregate, isConstant, setColumnName

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

Constructor Detail

ValueExpression

public ValueExpression(Object value,
                       DataType type)

Method Detail
- toString
```
public String toString()
```
  Overrides:
  
  toString in class Object
- doBind
```
public void doBind()
            throws StreamSqlException
```
  Specified by:
  
  doBind in class Expression
  
  Throws:
  
  StreamSqlException
- fillCode_getValueReturn
```
public void fillCode_getValueReturn(StringBuilder code)
                             throws StreamSqlException
```
  Specified by:
  
  fillCode_getValueReturn in class Expression
  
  Throws:
  
  StreamSqlException
- compile
```
public CompiledExpression compile()
```
  Overrides:
  
  compile in class Expression