unity.query
Class LQDupElimNode

java.lang.Object
  extended by unity.query.LQNode
      extended by unity.query.LQDupElimNode
All Implemented Interfaces:
LQTreeConstants

public class LQDupElimNode
extends LQNode


Field Summary
 
Fields inherited from interface unity.query.LQTreeConstants
ADD, AGGREGATEFUNCTION, AND, APPEND, ARITH_OP, ARITHMETICFUNCTION, AS_IDENTIFIER, AS_TABLE, BAG_DIFFERENCE, BAG_INTERSECTION, BAG_UNION, BigDecimal, COMPARISON_OP, CONDITION, CONSTANTEXPRESSION, CROSSPRODUCT, DIFFERENCE, DISTRIBUTEDJOIN, DUPLICATE_ELIMINATION, DYNAMICHASHJOIN, EARLYHASHJOIN, EARLYHASHJOIN_NOBUFFER, EXPRESSION, FILTER, FULLOUTERJOIN, FUNCTION, GROUPBY, HAVING, IDENTIFIER, IN, INNERJOIN, INTEGER, INTERSECTION, JOIN, LEFTOUTERJOIN, MATCHFUNCTION, MERGE, MERGEJOIN, MINIMUM_JOIN_BUFFER_SIZE, MULT, MULT_OP, NESTEDLOOPJOIN, NOT, OR, ORDERBY, PRODUCT, PROJECTION, REAL, RIGHTOUTERJOIN, SELECTION, SQLPATTERN, STRING, TABLE, TABLE_IDENTIFIER, UNION, UNKNOWN, XOR
 
Constructor Summary
LQDupElimNode()
           
 
Method Summary
 Operator buildOperator(Operator[] children)
           
 java.lang.String generateSQL()
           
 int numTuples()
           
 java.lang.String toString()
           
 int tupleSize()
           
 
Methods inherited from class unity.query.LQNode
addChild, clone, containsChild, getAllExprNodes, getChild, getChild, getChildren, getContent, getNumChildren, getOperator, getOutputRelation, getParent, getReference, getRequiredFields, getType, hasChildren, indexOfChild, print, removeChild, removeChild, removeChild, replaceChild, setChild, setContent, setMemorySizeTuples, setOperator, setParent, setReference, setType, stripDBAttr, stripDBTable
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

LQDupElimNode

public LQDupElimNode()
Method Detail

generateSQL

public java.lang.String generateSQL()
Specified by:
generateSQL in class LQNode

toString

public java.lang.String toString()
Overrides:
toString in class java.lang.Object

buildOperator

public Operator buildOperator(Operator[] children)
                       throws java.sql.SQLException
Specified by:
buildOperator in class LQNode
Throws:
java.sql.SQLException

numTuples

public int numTuples()
Overrides:
numTuples in class LQNode

tupleSize

public int tupleSize()
Overrides:
tupleSize in class LQNode