com.akiban.sql.parser
Class CurrentOfNode

java.lang.Object
  com.akiban.sql.parser.QueryTreeNode
      com.akiban.sql.parser.ResultSetNode
          com.akiban.sql.parser.FromTable
              com.akiban.sql.parser.CurrentOfNode

All Implemented Interfaces:

Visitable

public class CurrentOfNode
extends FromTable

The CurrentOf operator is used by positioned DELETE and UPDATE to get the current row and location for the target cursor. The bind() operations for positioned DELETE and UPDATE add a column to the select list under the statement for the row location accessible from this node. This node is placed in the from clause of the select generated for the delete or update operation. It acts much like a FromBaseTable, using the information about the target table of the cursor to provide information.

Field Summary

Fields inherited from class com.akiban.sql.parser.FromTable

correlationName, origTableName, tableProperties

Fields inherited from class com.akiban.sql.parser.QueryTreeNode

AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX

Constructor Summary

CurrentOfNode()

Method Summary

void	copyFrom(QueryTreeNode node) Fill this node with a deep copy of the given node.
String	getCursorName()
void	init(Object correlationName, Object cursor, Object tableProperties) Initialize a query tree node.
void	printSubNodes(int depth) Prints the sub-nodes of this object.
String	toString() Convert this object to a String.

Methods inherited from class com.akiban.sql.parser.FromTable

getCorrelationName, getExposedName, getOrigTableName, getTableName, init, setCorrelationName, setOrigTableName

Methods inherited from class com.akiban.sql.parser.ResultSetNode

getResultColumns, setInsertSource, setResultColumns

Methods inherited from class com.akiban.sql.parser.QueryTreeNode

accept, convertDefaultNode, debugFlush, debugPrint, formatNodeString, getBeginOffset, getDebugOutput, getEndOffset, getNodeFactory, getNodeType, getNullNode, getParserContext, getStatementType, getUserData, init, init, init, init, init, init, init, init, init, init, init, init, isInstanceOf, makeTableName, makeTableName, nodeHeader, printLabel, setBeginOffset, setDebugOutput, setEndOffset, setNodeType, setParserContext, setUserData, stackPrint, treePrint, treePrint, treePrint

Methods inherited from class java.lang.Object

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

Constructor Detail

CurrentOfNode

public CurrentOfNode()

Method Detail

init

public void init(Object correlationName,
                 Object cursor,
                 Object tableProperties)

Description copied from class: QueryTreeNode

Initialize a query tree node.

Overrides:

init in class QueryTreeNode

copyFrom

public void copyFrom(QueryTreeNode node)
              throws StandardException

Fill this node with a deep copy of the given node.

Overrides:

copyFrom in class FromTable

Throws:

StandardException

printSubNodes

public void printSubNodes(int depth)

Prints the sub-nodes of this object. See QueryTreeNode.java for how tree printing is supposed to work.

Overrides:

printSubNodes in class ResultSetNode

Parameters:

depth - The depth of this node in the tree

toString

public String toString()

Convert this object to a String. See comments in QueryTreeNode.java for how this should be done for tree printing.

Overrides:

toString in class FromTable

Returns:

This object as a String

getCursorName

public String getCursorName()