Package org.yamcs.yarch.streamsql

Class ColumnExpression

java.lang.Object

org.yamcs.yarch.streamsql.Expression

org.yamcs.yarch.streamsql.ColumnExpression

public class ColumnExpression
extends Expression

Represents a column in a query, for example x and y below: select x from table where y > 0

Field Summary

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

children, constantValue, hasAggregates, inputDef, type

Method Summary

Modifier and Type	Method	Description
void	collectRequiredInputs(Set<ColumnDefinition> inputs)
CompiledExpression	compile()
void	doBind()
void	fillCode_getValueReturn(StringBuilder code)
String	getName()
String	toString()

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

addFilter, bind, collectAggregates, 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

Method Detail

getName

public String getName()

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

collectRequiredInputs

public void collectRequiredInputs(Set<ColumnDefinition> inputs)

Overrides:

collectRequiredInputs in class Expression

compile

public CompiledExpression compile()
                           throws StreamSqlException

Overrides:

compile in class Expression

Throws:

StreamSqlException

toString

public String toString()

Overrides:

toString in class Object