pack-priv Class MaterializeSubqueryNode

Class Inheritance

java.lang.Object
org.apache.derby.impl.sql.compile.QueryTreeNode
org.apache.derby.impl.sql.compile.ResultSetNode
org.apache.derby.impl.sql.compile.MaterializeSubqueryNode

Imports

org.apache.derby.shared.common.error.StandardException, org.apache.derby.shared.common.reference.ClassName, org.apache.derby.iapi.services.classfile.VMOpcode, org.apache.derby.iapi.services.compiler.LocalField, .MethodBuilder, org.apache.derby.iapi.services.context.ContextManager

A MaterializeSubqueryNode is used to replace the nodes for a subquery, to facilitate code generation for materialization if possible. See beetle 4373 for details.

Field Summary

Modifier and Type	Field and Description
private LocalField	lf

Constructor Summary

Access	Constructor and Description
pack-priv	MaterializeSubqueryNode(LocalField lf, ContextManager cm)

Method Summary

Modifier and Type	Method and Description
pack-priv void	decrementLevel(int The amount to decrement by. decrement) Implements abstract org.apache.derby.impl.sql.compile.ResultSetNode.decrementLevel. Decrement (query block) level (0-based) for all of the tables in this ResultSet tree.
pack-priv void	generate(ActivationClassBuilder The ActivationClassBuilder for the class being built acb, MethodBuilder The method for the generated code to go into mb) Overrides org.apache.derby.impl.sql.compile.QueryTreeNode.generate. Do the code generation for this node.

Inherited from org.apache.derby.impl.sql.compile.ResultSetNode:: acceptChildren addNewPredicate adjustForSortElimination adjustForSortElimination assignResultSetNumber bindExpressions bindExpressionsWithTables bindNonVTITables bindResultColumns bindResultColumns bindTargetExpressions bindUntypedNullsToResultColumns bindVTITables changeAccessPath columnTypesAndLengthsMatch considerMaterialization enhanceRCLForInsert ensurePredicateList fillInReferencedTableMap flattenableInFromSubquery generateNormalizationResultSet generateResultSet genProjectRestrict genProjectRestrict genProjectRestrictForReordering getAllResultColumns getCandidateFinalCostEstimate getCostEstimate getCursorTargetTable getFinalCostEstimate getFromList getFromTableByName getMatchingColumn getNewCostEstimate getOptimizer getOptimizerImpl getRCLForInsert getReferencedTableMap getResultColumns getResultSetNumber getScratchCostEstimate isCursorTargetTable isInsertSource isNotExists isOneRowResultSet isOrderedOn isPossibleDistinctScan isStatementResultSet isUpdatableCursor LOJgetReferencedTables makeResultDescription makeResultDescriptors markAsCursorTargetTable markForDistinctScan markStatementResultSet modifyAccessPaths modifyAccessPaths notCursorTargetTable notFlattenableJoin numDistinctAggregates optimize parseDefault performMaterialization preprocess printQueryExpressionSuffixClauses printSubNodes projectResultColumns pushOffsetFetchFirst pushOrderByList pushQueryExpressionSuffix referencesTarget rejectParameters rejectXMLValues renameGeneratedResultNames replaceOrForbidDefaults returnsAtMostOneRow setCandidateFinalCostEstimate setCostEstimate setCursorTargetTable setInsertSource setOptimizer setReferencedTableMap setResultColumns setResultSetNumber setResultToBooleanTrueNode setScratchCostEstimate setTableConstructorTypes subqueryReferencesTarget toString updateTargetLockMode verifySelectStarSubquery

Field Detail

lf	back to summary
private LocalField lf

Constructor Detail

MaterializeSubqueryNode	back to summary
pack-priv MaterializeSubqueryNode(LocalField lf, ContextManager cm)

Method Detail

decrementLevel	back to summary
pack-priv void decrementLevel(int decrement) Implements abstract org.apache.derby.impl.sql.compile.ResultSetNode.decrementLevel. Doc from org.apache.derby.impl.sql.compile.ResultSetNode.decrementLevel. Decrement (query block) level (0-based) for all of the tables in this ResultSet tree. This is useful when flattening a subquery. Parameters decrement:int The amount to decrement by.

decrementLevel

back to summary

pack-priv void decrementLevel(int decrement)

Implements abstract org.apache.derby.impl.sql.compile.ResultSetNode.decrementLevel.

Doc from org.apache.derby.impl.sql.compile.ResultSetNode.decrementLevel.

Decrement (query block) level (0-based) for all of the tables in this ResultSet tree. This is useful when flattening a subquery.

Parameters

decrement:int: The amount to decrement by.

generate	back to summary
pack-priv void generate(ActivationClassBuilder acb, MethodBuilder mb) throws StandardException Overrides org.apache.derby.impl.sql.compile.QueryTreeNode.generate. Doc from org.apache.derby.impl.sql.compile.QueryTreeNode.generate. Do the code generation for this node. This is a place-holder method - it should be over-ridden in the sub-classes. Parameters acb:ActivationClassBuilder The ActivationClassBuilder for the class being built mb:MethodBuilder The method for the generated code to go into Annotations @Override Exceptions StandardException: Thrown on error

generate

back to summary

pack-priv void generate(ActivationClassBuilder acb, MethodBuilder mb) throws StandardException

Overrides org.apache.derby.impl.sql.compile.QueryTreeNode.generate.

Doc from org.apache.derby.impl.sql.compile.QueryTreeNode.generate.

Do the code generation for this node. This is a place-holder method - it should be over-ridden in the sub-classes.

Parameters

acb:ActivationClassBuilder: The ActivationClassBuilder for the class being built
mb:MethodBuilder: The method for the generated code to go into

Annotations

@Override

Exceptions

StandardException:: Thrown on error