Package org.apache.iotdb.db.qp.utils

Class WildcardsRemover

java.lang.Object

org.apache.iotdb.db.qp.utils.WildcardsRemover

public class WildcardsRemover
extends java.lang.Object

Removes wildcards (applying memory control and slimit/soffset control)

Constructor Summary

Constructors

Constructor	Description
WildcardsRemover(QueryOperator queryOperator)

Method Summary

Modifier and Type	Method	Description
boolean	checkIfPathNumberIsOverLimit(java.util.List<ResultColumn> resultColumns)
void	checkIfSoffsetIsExceeded(java.util.List<ResultColumn> resultColumns)
java.util.List<MeasurementPath>	removeWildcardFrom(org.apache.iotdb.commons.path.PartialPath path)
java.util.List<java.util.List<Expression>>	removeWildcardsFrom(java.util.List<Expression> expressions)

Methods inherited from class java.lang.Object

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

Constructor Detail

WildcardsRemover

public WildcardsRemover(QueryOperator queryOperator)

Method Detail

removeWildcardFrom

public java.util.List<MeasurementPath> removeWildcardFrom(org.apache.iotdb.commons.path.PartialPath path)
                                                   throws LogicalOptimizeException

Throws:

LogicalOptimizeException

removeWildcardsFrom

public java.util.List<java.util.List<Expression>> removeWildcardsFrom(java.util.List<Expression> expressions)
                                                               throws LogicalOptimizeException

Throws:

LogicalOptimizeException

checkIfPathNumberIsOverLimit

public boolean checkIfPathNumberIsOverLimit(java.util.List<ResultColumn> resultColumns)
                                     throws PathNumOverLimitException

Returns:

should break the loop or not

Throws:

PathNumOverLimitException

checkIfSoffsetIsExceeded

public void checkIfSoffsetIsExceeded(java.util.List<ResultColumn> resultColumns)
                              throws LogicalOptimizeException

Throws:

LogicalOptimizeException