org.apache.derby.impl.sql.compile
Class ReadCursorNode

java.lang.Object
  org.apache.derby.impl.sql.compile.QueryTreeNode
      org.apache.derby.impl.sql.compile.StatementNode
          org.apache.derby.impl.sql.compile.DMLStatementNode
              org.apache.derby.impl.sql.compile.ReadCursorNode

All Implemented Interfaces:

Visitable

Direct Known Subclasses:

CursorNode

abstract class ReadCursorNode

extends DMLStatementNode

A ReadCursorNode contains the logic to bind and generate a vanilla SELECT. This node is used for SELECT cursors

Author:

Jeff Lichtman

Field Summary

Fields inherited from class org.apache.derby.impl.sql.compile.DMLStatementNode

resultSet

Fields inherited from class org.apache.derby.impl.sql.compile.StatementNode

NEED_CURSOR_ACTIVATION, NEED_DDL_ACTIVATION, NEED_NOTHING_ACTIVATION, NEED_PARAM_ACTIVATION, NEED_ROW_ACTIVATION

Fields inherited from class org.apache.derby.impl.sql.compile.QueryTreeNode

AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX, beginOffset, endOffset

Constructor Summary

(package private)

ReadCursorNode()

Method Summary

QueryTreeNode	bind(DataDictionary dataDictionary) Bind this ReadCursorNode.
void	generate(ActivationClassBuilder acb, MethodBuilder mb) Do code generation for this ReadCursorNode
java.lang.String	statementToString()

Methods inherited from class org.apache.derby.impl.sql.compile.DMLStatementNode

accept, activationKind, bindExpressions, bindExpressionsWithTables, bindResultSetsWithTables, bindTables, generateParameterHolders, generateParameterValueSet, getResultSetNode, init, isAtomic, makeResultDescription, optimize, printSubNodes

Methods inherited from class org.apache.derby.impl.sql.compile.StatementNode

generate, lockTableForCompilation, toString

Methods inherited from class org.apache.derby.impl.sql.compile.QueryTreeNode

bind, convertDefaultNode, debugFlush, debugPrint, executeSchemaName, executeStatementName, formatNodeString, foundString, generateAuthorizeCheck, getBeginOffset, getClassFactory, getCompilerContext, getContextManager, getCursorInfo, getDataDictionary, getDependencyManager, getEndOffset, getExecutionFactory, getGenericConstantActionFactory, getIntProperty, getLanguageConnectionContext, getNodeFactory, getNodeType, getNullNode, getParameterTypes, getRowEstimate, getSchemaDescriptor, getSchemaDescriptor, getSPSName, getStatementType, getTableDescriptor, getTypeCompiler, init, init, init, init, init, init, init, init, init, init, init, init, init, isInstanceOf, isSessionSchema, isSessionSchema, makeConstantAction, makeTableName, needsSavepoint, nodeHeader, parseQueryText, printLabel, referencesSessionSchema, resolveTableToSynonym, setBeginOffset, setContextManager, setEndOffset, setNodeType, setRefActionInfo, treePrint, treePrint, verifyClassExist

Methods inherited from class java.lang.Object

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

Constructor Detail

ReadCursorNode

ReadCursorNode()

Method Detail

bind

public QueryTreeNode bind(DataDictionary dataDictionary)
                   throws StandardException

Bind this ReadCursorNode. This means looking up tables and columns and getting their types, and figuring out the result types of all expressions.

Overrides:

bind in class DMLStatementNode

Parameters:

dataDictionary - Namespace to bind against.

Returns:

The bound query tree

Throws:

StandardException - Thrown on error

generate

public void generate(ActivationClassBuilder acb,
                     MethodBuilder mb)
              throws StandardException

Do code generation for this ReadCursorNode

Overrides:

generate in class QueryTreeNode

Parameters:

acb - The ActivationClassBuilder for the class being built

mb - The method the generated code is to go into

Throws:

StandardException - Thrown on error

statementToString

public java.lang.String statementToString()

Specified by:

statementToString in class StatementNode