org.apache.hadoop.hbase.hbql.statement.select
Class SelectExpressionContext

java.lang.Object
  org.apache.expreval.expr.MultipleExpressionContext
      org.apache.hadoop.hbase.hbql.statement.select.SelectExpressionContext

All Implemented Interfaces:

Serializable, SelectElement

public class SelectExpressionContext
extends MultipleExpressionContext
implements SelectElement

See Also:

Serialized Form

Field Summary

Fields inherited from interface org.apache.hadoop.hbase.hbql.statement.select.SelectElement

serialVersionUID

Method Summary

boolean	allowColumns()
void	applyResultToAggregateValue(AggregateValue aggregateValue, org.apache.hadoop.hbase.client.Result result)
void	assignAsNamesForExpressions(SelectStatement selectStatement)
void	assignSelectValue(HConnectionImpl conn, Object obj, int maxVerions, org.apache.hadoop.hbase.client.Result result)
String	asString()
String	getAsName()
String	getElementName()
Class<? extends GenericValue>	getExpressionType()
Object	getValue(HConnectionImpl conn, org.apache.hadoop.hbase.client.Result result)
boolean	hasAColumnReference()
boolean	hasAsName()
void	initAggregateValue(AggregateValue aggregateValue)
boolean	isAConstant()
boolean	isADelegateColumnReference()
boolean	isAFamilySelect()
boolean	isAKeyValue()
boolean	isAnAggregateElement()
boolean	isDefaultKeyword()
AggregateValue	newAggregateValue()
static SelectExpressionContext	newExpression(GenericValue expr, String as)
boolean	useResultData()
void	validate(MappingContext mappingContext, HConnection connection)

Methods inherited from class org.apache.expreval.expr.MultipleExpressionContext

addColumnToUsedList, addExpression, addNamedParameter, evaluate, evaluateConstant, getAttribsUsedInExpr, getColumnsUsedInExpr, getExpressionList, getGenericValue, getMapping, getMappingContext, getNamedParamMap, getParameterList, getResultAccessor, getTableMapping, optimize, reset, setGenericValue, setMappingContext, setParameter, validateTypes

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.hbase.hbql.statement.select.SelectElement

getAttribsUsedInExpr, getParameterList, reset, setParameter, validateTypes

Method Detail

newExpression

public static SelectExpressionContext newExpression(GenericValue expr,
                                                    String as)

getAsName

public String getAsName()

Specified by:

getAsName in interface SelectElement

isAnAggregateElement

public boolean isAnAggregateElement()

Specified by:

isAnAggregateElement in interface SelectElement

initAggregateValue

public void initAggregateValue(AggregateValue aggregateValue)
                        throws HBqlException

Throws:

HBqlException

applyResultToAggregateValue

public void applyResultToAggregateValue(AggregateValue aggregateValue,
                                        org.apache.hadoop.hbase.client.Result result)
                                 throws HBqlException,
                                        ResultMissingColumnException,
                                        NullColumnValueException

Throws:

HBqlException

ResultMissingColumnException

NullColumnValueException

getElementName

public String getElementName()

Specified by:

getElementName in interface SelectElement

isAFamilySelect

public boolean isAFamilySelect()

Specified by:

isAFamilySelect in interface SelectElement

hasAsName

public boolean hasAsName()

Specified by:

hasAsName in interface SelectElement

isADelegateColumnReference

public boolean isADelegateColumnReference()

isAConstant

public boolean isAConstant()

isDefaultKeyword

public boolean isDefaultKeyword()

hasAColumnReference

public boolean hasAColumnReference()

isAKeyValue

public boolean isAKeyValue()

getExpressionType

public Class<? extends GenericValue> getExpressionType()
                                                throws HBqlException

Throws:

HBqlException

validate

public void validate(MappingContext mappingContext,
                     HConnection connection)
              throws HBqlException

Specified by:

validate in interface SelectElement

Throws:

HBqlException

assignAsNamesForExpressions

public void assignAsNamesForExpressions(SelectStatement selectStatement)

Specified by:

assignAsNamesForExpressions in interface SelectElement

assignSelectValue

public void assignSelectValue(HConnectionImpl conn,
                              Object obj,
                              int maxVerions,
                              org.apache.hadoop.hbase.client.Result result)
                       throws HBqlException

Specified by:

assignSelectValue in interface SelectElement

Throws:

HBqlException

newAggregateValue

public AggregateValue newAggregateValue()
                                 throws HBqlException

Specified by:

newAggregateValue in interface SelectElement

Throws:

HBqlException

getValue

public Object getValue(HConnectionImpl conn,
                       org.apache.hadoop.hbase.client.Result result)
                throws HBqlException

Throws:

HBqlException

asString

public String asString()

Specified by:

asString in interface SelectElement

Specified by:

asString in class MultipleExpressionContext

useResultData

public boolean useResultData()

Specified by:

useResultData in class MultipleExpressionContext

allowColumns

public boolean allowColumns()

Specified by:

allowColumns in class MultipleExpressionContext