|
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Objectorg.apache.derby.impl.sql.compile.QueryTreeNode
org.apache.derby.impl.sql.compile.ValueNode
org.apache.derby.impl.sql.compile.JavaToSQLValueNode
public class JavaToSQLValueNode
This node type converts a value from the Java domain to the SQL domain.
Field Summary | |
---|---|
(package private) JavaValueNode |
javaNode
|
Fields inherited from class org.apache.derby.impl.sql.compile.ValueNode |
---|
transformed |
Fields inherited from class org.apache.derby.impl.sql.compile.QueryTreeNode |
---|
AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX, isPrivilegeCollectionRequired |
Constructor Summary | |
---|---|
JavaToSQLValueNode()
|
Method Summary | |
---|---|
(package private) void |
acceptChildren(Visitor v)
Accept the visitor for all visitable children of this node. |
ValueNode |
bindExpression(FromList fromList,
SubqueryList subqueryList,
java.util.Vector aggregateVector)
Bind this expression. |
boolean |
categorize(JBitSet referencedTabs,
boolean simplePredsOnly)
Categorize this predicate. |
void |
disablePrivilegeCollection()
Triggers, constraints and views get executed with their definer's privileges and they can exist in the system only if their definers' still have all the privileges to creeate them. |
void |
generateExpression(ExpressionClassBuilder acb,
MethodBuilder mb)
Do code generation for this conversion of a value from the Java to the SQL domain. |
JavaValueNode |
getJavaValueNode()
Get the JavaValueNode that lives under this JavaToSQLValueNode. |
protected int |
getOrderableVariantType()
Return the variant type for the underlying expression. |
void |
init(java.lang.Object value)
Initializer for a JavaToSQLValueNode |
protected boolean |
isEquivalent(ValueNode o)
Tests if this node is equivalent to the specified ValueNode. |
ValueNode |
preprocess(int numTables,
FromList outerFromList,
SubqueryList outerSubqueryList,
PredicateList outerPredicateList)
Preprocess an expression tree. |
void |
printSubNodes(int depth)
Prints the sub-nodes of this object. |
ValueNode |
remapColumnReferencesToExpressions()
Remap all ColumnReferences in this tree to be clones of the underlying expression. |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
---|
JavaValueNode javaNode
Constructor Detail |
---|
public JavaToSQLValueNode()
Method Detail |
---|
public void init(java.lang.Object value)
init
in class QueryTreeNode
value
- The Java value to convert to the SQL domainpublic ValueNode preprocess(int numTables, FromList outerFromList, SubqueryList outerSubqueryList, PredicateList outerPredicateList) throws StandardException
preprocess
in class ValueNode
numTables
- Number of tables in the DML StatementouterFromList
- FromList from outer query blockouterSubqueryList
- SubqueryList from outer query blockouterPredicateList
- PredicateList from outer query block
StandardException
- Thrown on errorpublic void generateExpression(ExpressionClassBuilder acb, MethodBuilder mb) throws StandardException
generateExpression
in class ValueNode
acb
- The ExpressionClassBuilder for the class we're generatingmb
- the method the expression will go into
StandardException
- Thrown on errorpublic void printSubNodes(int depth)
printSubNodes
in class QueryTreeNode
depth
- The depth of this node in the treepublic JavaValueNode getJavaValueNode()
public void disablePrivilegeCollection()
QueryTreeNode
disablePrivilegeCollection
in class QueryTreeNode
QueryTreeNode.disablePrivilegeCollection()
public ValueNode bindExpression(FromList fromList, SubqueryList subqueryList, java.util.Vector aggregateVector) throws StandardException
bindExpression
in class ValueNode
fromList
- The FROM list for the query this
expression is in, for binding columns.subqueryList
- The subquery list being built as we find
SubqueryNodesaggregateVector
- The aggregate vector being built as we find AggregateNodes
StandardException
- Thrown on errorpublic ValueNode remapColumnReferencesToExpressions() throws StandardException
remapColumnReferencesToExpressions
in class ValueNode
StandardException
- Thrown on errorpublic boolean categorize(JBitSet referencedTabs, boolean simplePredsOnly) throws StandardException
categorize
in class ValueNode
referencedTabs
- JBitSet with bit map of referenced FromTablessimplePredsOnly
- Whether or not to consider method
calls, field references and conditional nodes
when building bit map
StandardException
- Thrown on errorprotected int getOrderableVariantType() throws StandardException
getOrderableVariantType
in class ValueNode
StandardException
- thrown on errorvoid acceptChildren(Visitor v) throws StandardException
acceptChildren
in class QueryTreeNode
v
- the visitor
StandardException
- on errorprotected boolean isEquivalent(ValueNode o)
This method provides basic expression matching facility for the derived class of ValueNode and it is used by the language layer to compare the node structural form of the two expressions for equivalence at bind phase.
Note that it is not comparing the actual row values at runtime to produce a result; hence, when comparing SQL NULLs, they are considered to be equivalent and not unknown.
One usage case of this method in this context is to compare the select column expression against the group by expression to check if they are equivalent. e.g.:
SELECT c1+c2 FROM t1 GROUP BY c1+c2
In general, node equivalence is determined by the derived class of ValueNode. But they generally abide to the rules below:
isEquivalent
in class ValueNode
o
- the node to compare this ValueNode against.
true
if the two nodes are equivalent,
false
otherwise.
|
Built on Thu 2010-12-23 20:49:13+0000, from revision ??? | ||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |