Package org.yamcs.yarch.streamsql

Class ValueExpression

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

Modifier and Type	Method	Description
CompiledExpression	compile()
void	doBind()
protected void	fillCode_Declarations(StringBuilder code)
void	fillCode_getValueReturn(StringBuilder code)
String	toString()

Methods inherited from class org.yamcs.yarch.streamsql.Expression

addFilter, bind, collectAggregates, collectRequiredInputs, fillCode_Constructor, fillCode_getValueBody, fillCode_InputDefVars, getColumnName, getConstantValue, getType, isAggregate, isConstant, setArgs, setColumnName

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

ValueExpression

public ValueExpression(Object value,
 DataType type)

Method Details

toString

public String toString()

Overrides:

toString in class Object

doBind

public void doBind()
            throws StreamSqlException

Specified by:

doBind in class Expression

Throws:

StreamSqlException

fillCode_Declarations

protected void fillCode_Declarations(StringBuilder code)

Overrides:

fillCode_Declarations in class Expression

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