Java Doc for GetCurrentConnectionNode.java in  » Database-DBMS » db-derby-10.2 » org » apache » derby » impl » sql » compile » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » db derby 10.2 » org.apache.derby.impl.sql.compile   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.apache.derby.impl.sql.compile.QueryTreeNode       org.apache.derby.impl.sql.compile.JavaValueNode          org.apache.derby.impl.sql.compile.GetCurrentConnectionNode GetCurrentConnectionNode final public class GetCurrentConnectionNode extends JavaValueNode (Code) This node represents a unary getCurrentConnection operator RESOLVE - parameter will always be null for now. Someday we may want to allow user to specify which of their connections they want. Assume that we will use a String. author:    Jerry Brenner Constructor Summary public   GetCurrentConnectionNode()      Method Summary public  JavaValueNode bindExpression(FromList fromList, SubqueryList subqueryList, Vector aggregateVector)       void bindParameter()      Bind a ? parameter operand of the char_length function. public  boolean categorize(JBitSet referencedTabs, boolean simplePredsOnly)      Categorize this predicate. public  void checkReliability(ValueNode sqlNode)      Check the reliability type of this java value. public  void generateExpression(ExpressionClassBuilder acb, MethodBuilder mb)      protected  int getOrderableVariantType()      Return the variant type for the underlying expression. public  void preprocess(int numTables, FromList outerFromList, SubqueryList outerSubqueryList, PredicateList outerPredicateList)      Preprocess an expression tree. public  JavaValueNode remapColumnReferencesToExpressions()      Remap all ColumnReferences in this tree to be clones of the underlying expression. Constructor Detail GetCurrentConnectionNode public GetCurrentConnectionNode()(Code) Constructor for a GetCurrentConnectionNode Method Detail bindExpression public JavaValueNode bindExpression(FromList fromList, SubqueryList subqueryList, Vector aggregateVector) throws StandardException(Code) Bind this operator Parameters:   fromList - The query's FROM list Parameters:   subqueryList - The subquery list being built as we find SubqueryNodes Parameters:   aggregateVector - The aggregate vector being built as we find AggregateNodes exception:   StandardException - Thrown on error bindParameter void bindParameter()(Code) Bind a ? parameter operand of the char_length function. categorize public boolean categorize(JBitSet referencedTabs, boolean simplePredsOnly)(Code) Categorize this predicate. Initially, this means building a bit map of the referenced tables for each predicate. If the source of this ColumnReference (at the next underlying level) is not a ColumnReference or a VirtualColumnNode then this predicate will not be pushed down. For example, in: select * from (select 1 from s) a (x) where x = 1 we will not push down x = 1. NOTE: It would be easy to handle the case of a constant, but if the inner SELECT returns an arbitrary expression, then we would have to copy that tree into the pushed predicate, and that tree could contain subqueries and method calls. RESOLVE - revisit this issue once we have views. Parameters:   referencedTabs - JBitSet with bit map of referenced FromTables Parameters:   simplePredsOnly - Whether or not to consider methodcalls, field references and conditional nodeswhen building bit map boolean Whether or not source.expression is a ColumnReferenceor a VirtualColumnNode. checkReliability public void checkReliability(ValueNode sqlNode) throws StandardException(Code) Check the reliability type of this java value. exception:   StandardException - Thrown on error See Also:   org.apache.derby.iapi.sql.compile.CompilerContext generateExpression public void generateExpression(ExpressionClassBuilder acb, MethodBuilder mb) throws StandardException(Code) See Also:   ConstantNode.generateExpression Parameters:   acb - The ExpressionClassBuilder for the class being built Parameters:   mb - The method the code to place the code exception:   StandardException - Thrown on error getOrderableVariantType protected int getOrderableVariantType()(Code) Return the variant type for the underlying expression. The variant type can be: VARIANT - variant within a scan (method calls and non-static field access) SCAN_INVARIANT - invariant within a scan (column references from outer tables) QUERY_INVARIANT - invariant within the life of a query (constant expressions) The variant type for the underlying expression. preprocess public void preprocess(int numTables, FromList outerFromList, SubqueryList outerSubqueryList, PredicateList outerPredicateList) throws StandardException(Code) Preprocess an expression tree. We do a number of transformations here (including subqueries, IN lists, LIKE and BETWEEN) plus subquery flattening. NOTE: This is done before the outer ResultSetNode is preprocessed. Parameters:   numTables - Number of tables in the DML Statement Parameters:   outerFromList - FromList from outer query block Parameters:   outerSubqueryList - SubqueryList from outer query block Parameters:   outerPredicateList - PredicateList from outer query block exception:   StandardException - Thrown on error remapColumnReferencesToExpressions public JavaValueNode remapColumnReferencesToExpressions()(Code) Remap all ColumnReferences in this tree to be clones of the underlying expression. JavaValueNode The remapped expression tree. Fields inherited from org.apache.derby.impl.sql.compile.JavaValueNode protected boolean forCallStatement(Code)(Java Doc) protected JSQLType jsqlType(Code)(Java Doc) Methods inherited from org.apache.derby.impl.sql.compile.JavaValueNode abstract JavaValueNode bindExpression(FromList fromList, SubqueryList subqueryList, Vector aggregateVector) throws StandardException(Code)(Java Doc) public void castToPrimitive(boolean booleanValue)(Code)(Java Doc) abstract public boolean categorize(JBitSet referencedTabs, boolean simplePredsOnly) throws StandardException(Code)(Java Doc) public void checkReliability(ValueNode sqlNode) throws StandardException(Code)(Java Doc) final protected void generate(ActivationClassBuilder acb, MethodBuilder mb) throws StandardException(Code)(Java Doc) abstract protected void generateExpression(ExpressionClassBuilder acb, MethodBuilder mb) throws StandardException(Code)(Java Doc) protected boolean generateReceiver(ExpressionClassBuilder acb, MethodBuilder mb) throws StandardException(Code)(Java Doc) final protected boolean generateReceiver(ExpressionClassBuilder acb, MethodBuilder mb, JavaValueNode receiver) throws StandardException(Code)(Java Doc) Object getConstantValueAsObject() throws StandardException(Code)(Java Doc) public JSQLType getJSQLType() throws StandardException(Code)(Java Doc) public String getJavaTypeName() throws StandardException(Code)(Java Doc) protected int getOrderableVariantType() throws StandardException(Code)(Java Doc) public String getPrimitiveTypeName() throws StandardException(Code)(Java Doc) final protected void getReceiverExpression(ExpressionClassBuilder acb, MethodBuilder mb, JavaValueNode receiver) throws StandardException(Code)(Java Doc) public boolean isPrimitiveType() throws StandardException(Code)(Java Doc) public TypeId mapToTypeID(JSQLType jsqlType)(Code)(Java Doc) public void markForCallStatement()(Code)(Java Doc) protected void markReturnValueDiscarded()(Code)(Java Doc) public boolean mustCastToPrimitive()(Code)(Java Doc) abstract public void preprocess(int numTables, FromList outerFromList, SubqueryList outerSubqueryList, PredicateList outerPredicateList) throws StandardException(Code)(Java Doc) abstract public JavaValueNode remapColumnReferencesToExpressions() throws StandardException(Code)(Java Doc) protected boolean returnValueDiscarded()(Code)(Java Doc) protected void returnValueToSQLDomain()(Code)(Java Doc) public void setClause(int clause)(Code)(Java Doc) public void setJavaTypeName(String javaTypeName)(Code)(Java Doc) protected boolean valueReturnedToSQLDomain()(Code)(Java Doc) Fields inherited from org.apache.derby.impl.sql.compile.QueryTreeNode final public static int AUTOINCREMENT_CREATE_MODIFY(Code)(Java Doc) final public static int AUTOINCREMENT_INC_INDEX(Code)(Java Doc) final public static int AUTOINCREMENT_IS_AUTOINCREMENT_INDEX(Code)(Java Doc) final public static int AUTOINCREMENT_START_INDEX(Code)(Java Doc) boolean isPrivilegeCollectionRequired(Code)(Java Doc) Methods inherited from org.apache.derby.impl.sql.compile.QueryTreeNode public Visitable accept(Visitor v) throws StandardException(Code)(Java Doc) public QueryTreeNode bind() throws StandardException(Code)(Java Doc) public DataValueDescriptor convertDefaultNode(DataTypeDescriptor typeDescriptor) throws StandardException(Code)(Java Doc) protected static void debugFlush()(Code)(Java Doc) public static void debugPrint(String outputString)(Code)(Java Doc) public void disablePrivilegeCollection()(Code)(Java Doc) public String executeSchemaName()(Code)(Java Doc) public String executeStatementName()(Code)(Java Doc) public static String formatNodeString(String nodeString, int depth)(Code)(Java Doc) public boolean foundString(String[] list, String search)(Code)(Java Doc) public GeneratedClass generate(ByteArray ignored) throws StandardException(Code)(Java Doc) protected void generate(ActivationClassBuilder acb, MethodBuilder mb) throws StandardException(Code)(Java Doc) void generateAuthorizeCheck(ActivationClassBuilder acb, MethodBuilder mb, int sqlOperation)(Code)(Java Doc) public int getBeginOffset()(Code)(Java Doc) final protected ClassFactory getClassFactory()(Code)(Java Doc) final protected CompilerContext getCompilerContext()(Code)(Java Doc) final public ContextManager getContextManager()(Code)(Java Doc) public Object getCursorInfo() throws StandardException(Code)(Java Doc) final public DataDictionary getDataDictionary()(Code)(Java Doc) final public DependencyManager getDependencyManager()(Code)(Java Doc) public int getEndOffset()(Code)(Java Doc) final public ExecutionFactory getExecutionFactory()(Code)(Java Doc) final public GenericConstantActionFactory getGenericConstantActionFactory()(Code)(Java Doc) protected int getIntProperty(String value, String key) throws StandardException(Code)(Java Doc) final protected LanguageConnectionContext getLanguageConnectionContext()(Code)(Java Doc) final public NodeFactory getNodeFactory()(Code)(Java Doc) protected int getNodeType()(Code)(Java Doc) public ConstantNode getNullNode(TypeId typeId, ContextManager cm) throws StandardException(Code)(Java Doc) public DataTypeDescriptor[] getParameterTypes() throws StandardException(Code)(Java Doc) public long getRowEstimate()(Code)(Java Doc) public String getSPSName()(Code)(Java Doc) final SchemaDescriptor getSchemaDescriptor(String schemaName) throws StandardException(Code)(Java Doc) final SchemaDescriptor getSchemaDescriptor(String schemaName, boolean raiseError) throws StandardException(Code)(Java Doc) protected int getStatementType()(Code)(Java Doc) final protected TableDescriptor getTableDescriptor(String tableName, SchemaDescriptor schema) throws StandardException(Code)(Java Doc) final protected TypeCompiler getTypeCompiler(TypeId typeId)(Code)(Java Doc) public void init(Object arg1) throws StandardException(Code)(Java Doc) public void init(Object arg1, Object arg2) throws StandardException(Code)(Java Doc) public void init(Object arg1, Object arg2, Object arg3) throws StandardException(Code)(Java Doc) public void init(Object arg1, Object arg2, Object arg3, Object arg4) throws StandardException(Code)(Java Doc) public void init(Object arg1, Object arg2, Object arg3, Object arg4, Object arg5) throws StandardException(Code)(Java Doc) public void init(Object arg1, Object arg2, Object arg3, Object arg4, Object arg5, Object arg6) throws StandardException(Code)(Java Doc) public void init(Object arg1, Object arg2, Object arg3, Object arg4, Object arg5, Object arg6, Object arg7) throws StandardException(Code)(Java Doc) public void init(Object arg1, Object arg2, Object arg3, Object arg4, Object arg5, Object arg6, Object arg7, Object arg8) throws StandardException(Code)(Java Doc) public void init(Object arg1, Object arg2, Object arg3, Object arg4, Object arg5, Object arg6, Object arg7, Object arg8, Object arg9) throws StandardException(Code)(Java Doc) public void init(Object arg1, Object arg2, Object arg3, Object arg4, Object arg5, Object arg6, Object arg7, Object arg8, Object arg9, Object arg10) throws StandardException(Code)(Java Doc) public void init(Object arg1, Object arg2, Object arg3, Object arg4, Object arg5, Object arg6, Object arg7, Object arg8, Object arg9, Object arg10, Object arg11) throws StandardException(Code)(Java Doc) public void init(Object arg1, Object arg2, Object arg3, Object arg4, Object arg5, Object arg6, Object arg7, Object arg8, Object arg9, Object arg10, Object arg11, Object arg12) throws StandardException(Code)(Java Doc) public void init(Object arg1, Object arg2, Object arg3, Object arg4, Object arg5, Object arg6, Object arg7, Object arg8, Object arg9, Object arg10, Object arg11, Object arg12, Object arg13) throws StandardException(Code)(Java Doc) public void init(Object arg1, Object arg2, Object arg3, Object arg4, Object arg5, Object arg6, Object arg7, Object arg8, Object arg9, Object arg10, Object arg11, Object arg12, Object arg13, Object arg14) throws StandardException(Code)(Java Doc) public boolean isAtomic() throws StandardException(Code)(Java Doc) protected boolean isInstanceOf(int nodeType)(Code)(Java Doc) public boolean isPrivilegeCollectionRequired()(Code)(Java Doc) final boolean isSessionSchema(SchemaDescriptor sd)(Code)(Java Doc) final boolean isSessionSchema(String schemaName)(Code)(Java Doc) public ConstantAction makeConstantAction() throws StandardException(Code)(Java Doc) public ResultDescription makeResultDescription() throws StandardException(Code)(Java Doc) public TableName makeTableName(String schemaName, String flatName) throws StandardException(Code)(Java Doc) public boolean needsSavepoint()(Code)(Java Doc) protected String nodeHeader()(Code)(Java Doc) public QueryTreeNode optimize() throws StandardException(Code)(Java Doc) public static QueryTreeNode parseQueryText(CompilerContext compilerContext, String queryText, Object[] paramDefaults, LanguageConnectionContext lcc) throws StandardException(Code)(Java Doc) public void printLabel(int depth, String label)(Code)(Java Doc) public void printSubNodes(int depth)(Code)(Java Doc) public boolean referencesSessionSchema() throws StandardException(Code)(Java Doc) public TableName resolveTableToSynonym(TableName tabName) throws StandardException(Code)(Java Doc) public void setBeginOffset(int beginOffset)(Code)(Java Doc) public void setContextManager(ContextManager cm)(Code)(Java Doc) public void setEndOffset(int endOffset)(Code)(Java Doc) public void setNodeType(int nodeType)(Code)(Java Doc) public void setRefActionInfo(long fkIndexConglomId, int[] fkColArray, String parentResultSetId, boolean dependentScan)(Code)(Java Doc) public String toString()(Code)(Java Doc) public void treePrint()(Code)(Java Doc) public void treePrint(int depth)(Code)(Java Doc) String verifyClassExist(String javaClassName, boolean convertCase) throws StandardException(Code)(Java Doc) Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)