Apache Derby Database Engine and Embedded JDBC Driver 10.17.1.0 · org.apache.derby.impl.sql.compile.ValueNode

Modifier and Type	Field and Description
private DataTypeDescriptor	dataTypeServices The data type for this node.
pack-priv boolean	transformed

Access	Constructor and Description
pack-priv	ValueNode(ContextManager cm)

Method Summary

Modifier and Type	Method and Description
pack-priv ValueNode	bindExpression(FromList fromList, SubqueryList subqueryList, List<AggregateNode> aggregates)
pack-priv ValueNode	Returns: The new top of the expression tree. bindExpression(FromList The FROM list to use for binding fromList, SubqueryList The SubqueryList we are building as we hit SubqueryNodes. subqueryList, List<AggregateNode> The aggregate list being built as we find AggregateNodes aggregates, boolean forQueryRewrite) Bind this expression.
pack-priv boolean	Returns: boolean Whether or not source.expression is a ColumnReference or a VirtualColumnNode. categorize(JBitSet JBitSet with bit map of referenced FromTables referencedTabs, boolean Whether or not to consider method calls, field references and conditional nodes when building bit map simplePredsOnly) Categorize this predicate.
pack-priv ValueNode	Returns: The modified expression changeToCNF(boolean Whether or not we are under a top level AndNode. underTopAndNode) Finish putting an expression into conjunctive normal form.
public ValueNode	Returns: bound coercion of this node to a builtin type as necessary checkIsBoolean() Bind time logic.
pack-priv void	checkTopPredicatesForEqualsConditions(int The tableNumber of the table from which the columns of interest come from. tableNumber, boolean[] Array of booleans for noting which columns are in = predicates without columns from the subquery block. May be null. eqOuterCols, int[] Array of table numbers in this query block. tableNumbers, JBitSet[] Array of bits for noting which columns are in = predicates for each table in the query block. May be null. tableColMap, boolean True if tableNumber is the table containing result columns resultColTable) Update the array of columns in = conditions with expressions without column references from the same table.
pack-priv boolean	Returns: True means this expression tree represents a constant value. constantExpression(PredicateList whereClause) Return whether or not this expression tree represents a constant value.
pack-priv void	copyFields(ValueNode The ValueNode to copy from. oldVN) Copy all of the "appropriate fields" for a shallow copy.
pack-priv ValueNode	Returns: The modified expression eliminateNots(boolean Whether or not we are under a NotNode. underNotNode) Eliminate NotNodes in the current query block.
pack-priv ValueNode	Returns: a constant representing the value to which this node is guaranteed to evaluate, or `this` if the value is not known evaluateConstantExpressions() If this node is known to always evaluate to the same value, return a node that represents that known value as a constant.
pack-priv ValueNode	Returns: The modified expression genEqualsFalseTree() Transform this into this = false.
pack-priv final void	generate(ActivationClassBuilder The ActivationClassBuilder for the class being built acb, MethodBuilder The method the expression will go into mb) Overrides org.apache.derby.impl.sql.compile.QueryTreeNode.generate. Do the code generation for this node.
pack-priv void	generateExpression(ExpressionClassBuilder The ExpressionClassBuilder for the class being built acb, MethodBuilder The method the expression will go into mb) Generate code for this calculation.
pack-priv ValueNode	Returns: The modified expression genIsNullTree(boolean if true, transform this into IS NOT NULL; otherwise, transform this into IS NULL notNull) Transform this into this IS NULL or IS NOT NULL.
pack-priv ValueNode	Returns: ValueNode The new tree. genSQLJavaSQLTree() Generate a SQL->Java->SQL conversion tree above the current node and bind the new nodes individually.
pack-priv ValueNode	Returns: ValueNode A clone of this node. getClone() Return a clone of this node.
pack-priv String	Returns: the default column name for an expression -- null. getColumnName() This is null so that the caller will substitute in the resultset generated name as needed.
pack-priv Object	Returns: An Object representing the bind time value of this expression tree. (null if not a bind time constant.) getConstantValueAsObject() Return an Object representing the bind time value of this expression tree.
protected final DataValueFactory	getDataValueFactory() Return the DataValueFactory
protected int	Returns: The variant type for the underlying expression. getOrderableVariantType() Return the variant type for the underlying expression.
pack-priv String	Returns: the default schema name for an expression -- null getSchemaName() This returns the user-supplied schema name of the column.
pack-priv ResultColumn	Returns: The source of this ValueNode, null if this node is not sourced by a column. getSourceResultColumn() Get the source for this ValueNode.
pack-priv String	Returns: the default table name for an expression -- null getTableName() This returns the user-supplied table name of the column.
pack-priv JBitSet	Returns: A bit map of table numbers referred to in this expression getTablesReferenced() Get a bit map of table references in this expression
pack-priv boolean	Returns: Whether or not this predicate has been transformed. getTransformed() Return whether or not this predicate has been transformed.
pack-priv final TypeCompiler	Returns: This ValueNode's TypeCompiler getTypeCompiler() Get the TypeCompiler from this ValueNode, based on its TypeId using getTypeId().
pack-priv TypeId	Returns: The TypeId from this ValueNode. This may be null if the node isn't bound yet. getTypeId() Get the TypeId from this ValueNode.
pack-priv DataTypeDescriptor	Returns: The DataTypeServices from this ValueNode. This may be null if the node isn't bound yet. getTypeServices() Get the DataTypeServices from this ValueNode.
pack-priv boolean	isBinaryEqualsOperatorNode() Returns true if this value node is a equals operator.
pack-priv boolean	Returns: Whether or not this node represents a false constant. isBooleanFalse() Does this represent a false constant.
pack-priv boolean	Returns: Whether or not this node represents a true constant. isBooleanTrue() Does this represent a true constant.
pack-priv boolean	Returns: boolean Whether or not this expression tree is cloneable. isCloneable() Return whether or not this expression tree is cloneable.
pack-priv boolean	Returns: Whether or not this expression tree represents a constant expression. isConstantExpression() Return whether or not this expression tree represents a constant expression.
pack-priv abstract boolean	Returns: `true` if the two nodes are equivalent, `false` otherwise. isEquivalent(ValueNode the node to compare this ValueNode against. other) Tests if this node is equivalent to the specified ValueNode.
pack-priv boolean	isInListProbeNode() Returns true if this value node is an operator created for optimized performance of an IN list.
pack-priv boolean	isParameterNode() Returns TRUE if this is a parameter node.
pack-priv boolean	isRelationalOperator() Returns true if this ValueNode is a relational operator.
pack-priv boolean	Returns: `true` if `this` and `o` represent the same logical node type, i.e. kind. isSameNodeKind(ValueNode The other value node whose kind we want to compare with. other) Some node classes represent several logical node types (to reduce footprint), which we call kinds.
pack-priv boolean	optimizableEqualityNode(Optimizable the table being optimized. Column reference must be from this table. optTable, int the column number. One of the operands of this predicate must be the column number specified by optTable/columnNumber columnNumber, boolean if set to true we also consider IS NULL predicates; otherwise consider only = predicates. isNullOkay) Return true if the predicate represents an optimizable equality node.
pack-priv ValueNode	Returns: The modified expression preprocess(int Number of tables in the DML Statement numTables, FromList FromList from outer query block outerFromList, SubqueryList SubqueryList from outer query block outerSubqueryList, PredicateList PredicateList from outer query block outerPredicateList) Preprocess an expression tree.
pack-priv ValueNode	Returns: The modified expression putAndsOnTop() Do the 1st step in putting an expression into conjunctive normal form.
pack-priv ValueNode	Returns: ValueNode The remapped expression tree. remapColumnReferencesToExpressions() Remap all ColumnReferences in this tree to be clones of the underlying expression.
pack-priv boolean	Returns: Whether this node's type will be determined from the context requiresTypeFromContext() Returns TRUE if the type of this node will be determined from the context in which it is getting used.
public double	selectivity(Optimizable optTable) The default selectivity for value nodes is 50%.
public void	setCollationInfo(DataTypeDescriptor Type to take collation type and derivation from. collationInfoType) Set the collation type and derivation of this node based upon the collation information in the passed in type.
public void	setCollationInfo(int Collation type collationType, int Collation derivation collationDerivation) Set the collation type and derivation of this node based upon the collation information passed in. This may result in a different object being returned from getTypeServices().
protected final void	setCollationUsingCompilationSchema() Set the collation based upon the current schema with derivation type implicit.
protected final void	setCollationUsingCompilationSchema(int This can be StringDataValue#COLLATION_DERIVATION_IMPLICIT StringDataValue#COLLATION_DERIVATION_NONE StringDataValue#COLLATION_DERIVATION_EXPLICIT collationDerivation) There are many subclasses of ValueNode where we want the DataTypeDescriptor of the node to have the same collation type as the compilation schema's collation type.
public void	setNullability(boolean nullability) Set the nullability of this value.
pack-priv void	setTransformed() Mark this predicate has having been transformed (other predicates were generated from it).
pack-priv final void	setType(TypeId typeId, boolean isNullable, int maximumWidth) Set this node's type from type components.
pack-priv final void	setType(TypeId typeId, int precision, int scale, boolean isNullable, int maximumWidth) Set this node's type from type components.
pack-priv void	setType(DataTypeDescriptor The DataTypeServices to set in this ValueNode dataTypeServices) Set the DataTypeServices for this ValueNode.
private void	setValueCols(JBitSet[] Array of bitmaps for noting which columns are in = predicates with columns from each table tableColMap, boolean[] Array of booleans for noting which columns are in = predicates without columns from the subquery block. eqOuterCols, int The column to set colReference, int If -1 set all the bit for all the tables for that column; otherwise set the bit for the specified table resultTable) Set eqOuterCols and the column in all the tables for constants, parmeters and correlation columns The column in the tableColMap is set only for the current table if the table is the result column table.
public String	Returns: This object as a String toString() Overrides org.apache.derby.impl.sql.compile.QueryTreeNode.toString. Convert this object to a String.
public boolean	Returns: the default updatability for an expression - false updatableByCursor()
private void	updateMaps(JBitSet[] Array of bitmaps for noting which columns are in = predicates with columns from each table tableColMap, boolean[] Array of booleans for noting which columns are in = predicates without columns from the subquery block. eqOuterCols, int[] tableNumbers, int table number for which we are setting up the Maps tableNumber, int -1 if this table is not the result table; otherwise the index into tableNumbers for the result table resultTable, ValueNode one side of the = predicate arg1, ValueNode other side of the = predicate arg2) Set the correct bits in tableColMap and set the boolean value in eqOuterCols given two arguments to an = predicate tableColMap[t] - bit is set if the column is in an = predicate with a column in table t, or a bit is set if the column is in an = predicate with a constant,parameter or correlation variable (for all table t, if this tableColMap is not for the table with the result columns) eqOuterCols[c] - is true if the column is in an = predicate with a constant, parameter or correlation variable
pack-priv boolean	Returns: Boolean which reflects validity of the tree. verifyChangeToCNF() Verify that changeToCNF() did its job correctly.
pack-priv boolean	Returns: Boolean which reflects validity of the tree. verifyEliminateNots() Verify that eliminateNots() did its job correctly.
pack-priv boolean	Returns: Boolean which reflects validity of the tree. verifyPutAndsOnTop() Verify that putAndsOnTop() did its job correctly.

Inherited from org.apache.derby.impl.sql.compile.QueryTreeNode:: accept acceptChildren addTag addUDTUsagePriv addUDTUsagePriv bindOffsetFetch bindRowMultiSet bindUserCatalogType bindUserType checkReliability checkReliability convertDefaultNode copyTagsFrom createTypeDependency debugFlush debugPrint disablePrivilegeCollection formatNodeString generateAuthorizeCheck getBeginOffset getClassFactory getCompilerContext getContext getContextManager getDataDictionary getDependencyManager getEndOffset getExecutionFactory getGenericConstantActionFactory getIntProperty getLanguageConnectionContext getLongProperty getNullNode getOffsetOrderedNodes getOptimizerFactory getOptimizerTracer getParameterTypes getSchemaDescriptor getSchemaDescriptor getStatementType getTableDescriptor getTypeCompiler getUDTDesc isAtomic isPrivilegeCollectionRequired isSessionSchema isSessionSchema makeConstantAction makeTableName makeTableName nodeHeader optimizerTracingIsOn orReliability parseSearchCondition parseStatement printLabel printSubNodes referencesSessionSchema resolveTableToSynonym setBeginOffset setEndOffset setRefActionInfo stackPrint taggedWith treePrint treePrint verifyClassExist

public abstract Class ValueNode

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