org.eigenbase.rel
Class TableModificationRel

java.lang.Object
  org.eigenbase.rel.AbstractRelNode
      org.eigenbase.rel.SingleRel
          org.eigenbase.rel.TableModificationRelBase
              org.eigenbase.rel.TableModificationRel

All Implemented Interfaces:

Cloneable, RelNode

public final class TableModificationRel
extends TableModificationRelBase

TableModificationRel is like TableAccessRel, but represents a request to modify a table rather than read from it. It takes one child which produces the modified rows. (For INSERT, the new values; for DELETE, the old values; for UPDATE, all old values plus updated new values.)

Version:

$Id: //open/dev/farrago/src/org/eigenbase/rel/TableModificationRel.java#15 $

Nested Class Summary

Nested classes/interfaces inherited from class org.eigenbase.rel.TableModificationRelBase

TableModificationRelBase.Operation

Field Summary

Fields inherited from class org.eigenbase.rel.TableModificationRelBase

connection, table

Fields inherited from class org.eigenbase.rel.AbstractRelNode

digest, id, nextId, rowType, traits

Fields inherited from interface org.eigenbase.rel.RelNode

emptyArray

Constructor Summary

TableModificationRel(RelOptCluster cluster, RelOptTable table, RelOptConnection connection, RelNode child, TableModificationRelBase.Operation operation, List<String> updateColumnList, boolean flattened)

Method Summary

TableModificationRel

clone() Clones this RelNode.

Methods inherited from class org.eigenbase.rel.TableModificationRelBase

computeSelfCost, deriveRowType, explain, getConnection, getExpectedInputRowType, getOperation, getTable, getUpdateColumnList, isDelete, isFlattened, isInsert, isMerge, isUpdate

Methods inherited from class org.eigenbase.rel.SingleRel

childrenAccept, getChild, getInputs, getRows, replaceInput

Methods inherited from class org.eigenbase.rel.AbstractRelNode

cloneTraits, collectVariablesSet, collectVariablesUsed, computeDigest, getChildExps, getCluster, getCollationList, getConvention, getCorrelVariable, getDescription, getDigest, getId, getInput, getOrCreateCorrelVariable, getQuery, getRelTypeName, getRowType, getTraits, getVariablesStopped, inheritTraitsFrom, isAccessTo, isDistinct, isValid, onRegister, recomputeDigest, register, registerCorrelVariable, setCorrelVariable, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

TableModificationRel

public TableModificationRel(RelOptCluster cluster,
                            RelOptTable table,
                            RelOptConnection connection,
                            RelNode child,
                            TableModificationRelBase.Operation operation,
                            List<String> updateColumnList,
                            boolean flattened)

Method Detail

clone

public TableModificationRel clone()

Description copied from interface: RelNode

Clones this RelNode.

Traits of the RelNode must be explicitly cloned, using AbstractRelNode.inheritTraitsFrom(AbstractRelNode), as the RelNode may have traits of which it has no knowledge. Example implementation:

     public MyRelNode clone()
     {
         MyRelNode clone = new MyRelNode(...);
         clone.inheritTraitsFrom(this);
         return clone;
     }
 

N.B.: This method must be overridden whenever an existing, concrete RelNode is extended. Otherwise, calling clone() will produce a differently typed RelNode, resulting in invalid or incorrect query plans.

Specified by:

clone in interface RelNode

Specified by:

clone in class AbstractRelNode

Returns:

a clone of this RelNode